cfa piling -...

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METHOD STATEMENT

CFA Piling

00 23/06/2016 First issue

REV DATE STATUS / DESCRIPTION OF CHANGES

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CONTENTS

1.0 Introduction – Scope of Works ..................................................................................................... 4

2.0 Reference Documents ................................................................................................................... 4

3.0 Pre-commencement Requirements.............................................................................................. 4

3.1. Geology ...................................................................................................................................... 4

3.2. Existing Services ...................................................................................................................... 4

3.3. Working Platform ...................................................................................................................... 4

3.4. Access ........................................................................................................................................ 5

3.5. Setting-Out of Piles ................................................................................................................... 5

4.0 Resources ....................................................................................................................................... 5

4.1. Materials ..................................................................................................................................... 5

4.2. Plant ........................................................................................................................................... 5

4.3. Labour ........................................................................................................................................ 6

5.0 Methodology ................................................................................................................................... 7

5.1. Description of the Works ......................................................................................................... 7

5.2. Location Plan ........................................................................................................................... 12

5.3. Pile Schedule ............................................................................................................................ 12

5.4. Reinforcement ......................................................................................................................... 12

5.5. Testing Regime ....................................................................................................................... 13

6.0 Programme ................................................................................................................................... 13

7.0 Quality ........................................................................................................................................... 13

7.1. Safety Management System .................................................................................................. 13

7.2. Monitoring and Review ........................................................................................................... 14

8.0 Health and Safety ......................................................................................................................... 14

8.1. Induction .................................................................................................................................. 14

8.2. Daily Inspections..................................................................................................................... 14

8.3. PPE ........................................................................................................................................... 14

8.4. Records .................................................................................................................................... 15

8.5. Fire Extinguishers / First Aid ................................................................................................. 15

8.6. Risk Assessment .................................................................................................................... 15

8.7. Security .................................................................................................................................... 15

8.8. Welfare Facilities ..................................................................................................................... 15

8.9. Emergency Call-out ................................................................................................................ 15

9.0 Environment ................................................................................................................................. 16

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APPENDICES / ASSOCIATED RISK ASSESSMENTS

A. Risk Assessments

B. Pile Record and Checklist Sheet

C. Pile Rig Details

D. Lift Plan

E. Working Platform Certificate [FPS/WPC/4]

F. Multi Site Environmental Impacts Checklist

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1.0 Introduction – Scope of Works

The proposed work is the construction of CFA Bored Piles in accordance with the Contract

Specification and Drawings to form the proposed structure. Piles are 450mm in diameter

and are to be constructed using the CFA Piling Technique.

2.0 Reference Documents

1. Site Investigation: Jomas Site Investigation,

2. Drawings: - Pile Layout Drawing 152305-FSD-A2-PL-DR-S-0001,002,003 T1

3. Specification:- SPERW

4. SUB-CONTRACTOR Design Calculations

5. Institute of Civil Engineers Specification for Piling and Embedded Retaining Wall (SPERW) – Second Edition

6. Working Platforms for tracked plant: good practice guide to the design, installation, maintenance and repair of ground-supported working platforms – BRE 2004

7. LOLER – lifting operations and lifting equipment regulations 1998

8. PUWER – provision and use of work equipment regulations 1998

3.0 Pre-commencement Requirements

3.1. Geology

The Piling Operations Manager will have satisfied himself prior to the

commencement of the contract with regards to the geology of the site and any

effects it may have on the Works. The Principal Contractor has provided a Soil

Investigation Report, carried out by Jomas Site Investigation.

3.2. Existing Services

The Principal Contractor will carry out any inspections for existing services and

probe for existing sub-structures. These areas are to be removed or clearly marked

prior to any Piling Works.

An exclusion zone will be maintained around the Piling Rig in operation and around

recently cast Piles.

3.3. Working Platform

3.3.1. The Principal Contractor will provide the Piling Crew with a firm and level hard

standing Working Platform as specified, based upon the BRE load cases

provided by SUB-CONTRACTOR for the Rig to be used.

3.3.2. Attention needs to be given to the edges of Working Platforms: determine how

near the edge of the platform plant can be permitted while avoiding instability.

A minimum distance of half the machine width is usually required. Clear

marking of the working area is essential.

3.3.3. Sites where there have been cut and fill operations, or where plant is required

to operate near slopes or batters, will need to be checked for slope stability

with the additional loading of the plant in place. Sloping sites present

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particular problems for stability, which should be addressed in the design –

some plant may not be stable at 1 in 10.

3.3.4. This Working Platform will be maintained throughout the duration of the Piling

Works. If obstructions are removed, the mat must be properly reinstated in

accordance with the original Piling Mat Design

3.3.5. The Working Platform, including ramps and accesses, is to be used only by

plant for which it has been designed.

3.3.6. Any areas that do not form part of the Working Platform must be clearly

indicated to the Piling Supervisor.

3.3.7. The working platform certificate provided must be signed off before any

commencement of works.

3.3.8. Any parts of the Piling Mat deemed unacceptable by the Piling Foreman or

Site manager must be rectified straight away.

3.3.9. The Working Platform level must be provided before any Piling

commences.

3.4. Access

Access routes onto and off site will be as agreed with the Principal Contractor. The

CFA Piling Rig will be transported to site on a low loader capable of carrying the Rig.

The Rig will track itself off the low loader and will not be lifted off by means of a

crane. If necessary, a wide enough ramp will be constructed to provide a safe

access onto site for the Rig and timber boards/spreader plates placed to protect any

existing surfaced areas and kerbs, c/o the Principal Contractor.

3.5. Setting-Out of Piles

The qualified Setting-Out Engineer will set out the Pile positions.

Aitch Construction Ltd will carry out the setting out in accordance with the latest Pile

layout drawings received.

4.0 Resources

4.1. Materials

• Concrete – UKAS certified

• Reinforcing Steel – CARES certified

• COSHH as per assessments in Appendix I

4.2. Plant

The following equipment items are envisaged to be used for Piling operations:

Item Quantity

CFA Piling Rig 1

Excavator (C/o Aitch Construction Ltd) 1

Agitator 1

Concrete trailer pump and equipment 1

Single tool compressor and hose 1

Job box 1

Ready mix concrete wagons As required

Hiab delivery wagon As required

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All plant and equipment will be certified and maintained to PUWER 98 and where

applicable, LOLER 98.

All lifting equipment will be certified and maintained to LOLER 98.

The following manpower is envisaged to be used for Piling operations:

Manpower Quantity

Foreman/Rig Driver (Certified Rig Operator) 1

Banksman (Certified Banksman / Slinger) 1/2

Excavator Operator C/O (Aitch Construction Ltd) 1/2

Pump Operator 1/2

4.3. Labour

Title Name Contact Phone Number

Operations Manager

Project Manager

Design Manager

Site

Foreman/Supervisor

Health & Safety Advisor

Group Health and Safety Department

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5.0 Methodology

This method statement provides a detailed description on CFA piling.

5.1. Description of the Works

The main risks associated with the Piling operations are:

i. Failure of Piling Rig

ii. Spoil removal during Piling operations

iii. Personnel falling into freshly concreted bores

iv. Collision and crushing by Piling Equipment

v. Lifting and placing reinforcement

vi. Working near railway viaduct not applicable to this project.

To overcome these potential risks, the following safety features will be implemented

to ensure a safe method of working: -

GENERAL Piles will be constructed with a diesel powered track mounted CFA Piling Rig.

WORKING Working hours will be as follows:

Monday to Friday 08.00 – 17.00 hrs.

- Workmanship will be consistent throughout the duration of the Piling works.

- All SUB-CONTRACTOR crew and subcontractors will be focused on their

work throughout the working day

- It is important that all SUB-CONTRACTOR staff take the breaks they are

entitled throughout the day.

- The quality of Piles, including steel cages and test cubes, will be to a

consistent high standard and this standard will not drop at any time i.e. end

of shift / week / last day before holiday period etc.

ACCESS Access to the Piling area will be as provided by Aitch

Contractors Ltd. Access ramps between working areas to be no

greater than 1:10 gradient.

LIGHTING Task lighting as fitted to plant will be provided and maintained

by SUB-CONTRACTOR. General/safety lighting for the access and

working area will be provided by Aitch Contractors Ltd. if necessary.

RIG

Mobilisation – The rig will be mobilised in a designated area where a permit to

dig is required before the mobilisation. The Piling equipment will be a diesel

powered track mounted CFA Piling rig. The mast of the Piling rig is

selferecting and during mobilisation, is lifted from the travelling horizontal

position to the vertical working through a series of rams positioned on the

mast and rig body.

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To install the augers onto the Piling rig, a MEWP will be used to access the

drilling head of the Piling rig and the auger flight connections. The banksman

will be secured to the MEWP with a safety harness when rig mobilisation is

taking place. To position the augers onto the rig, the lead auger will be lifted

using the auxiliary winch line and placed into the guide clamps on the front of

the machine. The banksman will close the clamps securing the lead auger

and remove the auxiliary line. The drilling head will be lowered and the drive

hex aligned and coupled up to the lead auger. The auger will then be drilled

into the ground by approximately 1m and the drill head then disconnected and

raised off the lead auger.

With the drilling head raised clear, the first of the 6m augers will be lifted with

the auxiliary winch line approximately two-thirds along its length so that when

lifted it hangs straight. The auxiliary line will have two sets of chains secured

to the auger when lifting into place. The first chain will be a single leg choke

chain double wrapped around the second flight on the auger. The second

chain will be a 4m choke chain secured to the third flight.

This will then be guided by the banksman and lowered onto the lead auger

locating the hex couplings. Prior to connecting the couplings and installing

the pins, the couplings will be ‘greased’ to ensure there is no issue when

connecting the augers. When the bottom coupling is in position, the rig will be

guided locating the drive hex into the top of the auger and the guide clamps

closed.

The banksman will assess the auger connection using the MEWP. When in

position, the auger pins will be installed into the bottom coupling and the

auxiliary line will be lowered off giving plenty of slack on the line and chain.

The auger will then be drilled into the ground with the banksman keeping a

close watch on the auxiliary line ensuring that it does not become tangled on

the auger (it will wind around the auger) until it is low enough that it can be

disconnected from the lifting chain and then unwound. The banksman will

also monitor both chains to ensure they remain secured to the auger when

lifted into place.

The auger will then continue to be drilled into the ground until the top coupling

is approximately 1m above ground level. The drilling head will then be raised

once more and the process repeated until all three augers are in position.

De-rigging –De-rigging will be carried out in a similar way, the De-rigging will

take place in a designated area and the permit to dig will be in place.

To remove the augers from the Piling rig a MEWP will be used to access the

drilling head of the Piling rig and the auger flight connections. The banksman

will be secured to the MEWP with a safety harness when De-rigging is taking

place. The couplings are ‘greased’ to ensure there is no issue when

disconnecting the augers.

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The ancillary winch will be connected to the auger being removed. There will

be two chains used to secure the augers, one single leg choke chain will be

double wrapped around the second flight and a secondary 4m choke chain is

put on the third flight should the single leg chain become loose. The

banksman will remove the auger pins when the ancillary winch is securely

fastened to the auger and when the pins are removed the auger is lifted onto

the ground using the ancillary winch.

The process is repeated until all auger flights have been removed from the

Piling rig. The MEWP will remain on site for the duration of the works, in the

event that there is a blockage in the concrete hose, it can be released without

delay.

Concrete Washout - Before commencement on each day, a ‘grout mix’ of

concrete and ‘prime a pump’ will be pumped through the concrete hoses and

hollow stem auger of the Piling Rig. This will ensure that the concrete hoses

and auger stems are ready for concrete to pump through the hoses / augers

without blockage.

At the end of each day the concrete hoses and augers are washed out after

Piling. This is carried out using a compressor to wash out any concrete

remaining in the concrete lines. The compressor is connected to the end of

the concrete hose and a pressure (8 bar) is built up to wash and blow out any

concrete. The excess concrete is then discharged through the bottom of the

hollow stem auger. This is in a controlled manner where blowout bins are

positioned at the bottom of the auger stem to contain the discharge. The

operatives will be notified when this sequence of events is occurring and no

site personnel will be in this area.

Equipment and Material Delivery - All construction traffic including the Piling

Rig, delivery vehicles and concrete wagons will access the site works using

the designated Works Access’s only. On arrival to site all equipment and

material deliveries will report to the person in charge prior to off loading. All

deliveries will transit through the site with a Banksman present at all times.

No keys are to be left in unmanned machines.

Equipment and Material Storage - Equipment and materials will be stored

adjacent to the Piling area. At the end of each shift the Rig shall be left in a

safe and secure manner.

WORKING PLATFORM

Construction - The location of all services and monitoring installations in the

area shall be confirmed and highlighted/identified by Aitch Contractors Ltd.

Protective mats (ply sheets) necessary to minimise the risk of damage to

existing surfaces or third party property will be provided by Aitch Contractors

Ltd. All hoardings, fences, noise and splash barriers, statutory warnings,

flagmen etc as necessary to protect the works, plant, materials, personnel,

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third party property and the general public will be provided by Aitch

Contractors Ltd. This shall include protection from exhaust, oil, grease etc.

Any services or monitoring installations that may be affected by our works that

cannot be redirected, or removed, will be protected as required by Aitch

Contractors Ltd.

A permit to work/dig will be completed and signed by Aitch Contractors Ltd.

and the Piling Supervisor / Foreman and Operatives, on a basis agreed by

Aitch Contractors Ltd.

A suitable clear dry level safe working area shall be prepared for SUB-

CONTRACTOR plant and equipment prior to Piling operations commencing

(refer to ‘Working Platforms for tracked plant: good practice guide to the

design, installation, maintenance and repair of ground-supported working

platforms – BRE 2004).

The working platform will be REGULARLY INSPECTED, MAINTAINED,

MODIFIED, REPAIRED, and REINSTATED to the as-designed condition after

any excavation or damage, throughout the period when the Piling Rig and

equipment is on the site by Aitch Contractors Ltd.

A completed copy of the FPS Working Platform Certificate (FPS/WPC/4)

Appendix F signed by an authorised person from the Principal Contractor

shall be given to each user of the working platform prior to commencement of

any works on site and the Working Platform Regular Inspection Log is to be

maintained by the Principal Contractor in accordance FPS/WPC/4 Guidance

on Working Platforms for Tracked Plant 3.1-3.3. This is the responsibility of

Aitch Contractors Ltd.

PILING SEQUENCE

The Piling sequence will be generally as per agreed with Aitch Contractors

Ltd. The piles will be constructed in such a manner that no damage will be

caused to piles previously constructed i.e. cracking, clashing or disturbing.

PARTY WALL

Aitch Contractors Ltd. to have in place a procedure for Piling works adjacent

to Party Walls.

PILE BORING

The position of each Pile will be set out by Aitch Contractors Ltd. and

referenced with the Pile number prior to drilling.

The Piling Rig shall be erected at each Pile position and an expendable plug

shall be inserted to seal the hollow stem of the auger. Check that the auger

set up is within the plan and verticality tolerance.

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The Pile is bored using a continuous flight auger. Following initial penetration,

drilling is paused whilst the auger gates are released. Drilling shall proceed

until the design depth is reached or practical refusal of the auger is met,

whichever occurs first.

CONCRETING

Concrete of specified mix 35N, DC-2 shall be pumped through the hollow

stem and whilst slowly rotating the auger it shall be gradually withdrawn,

ensuring adequate auger embedment into the concrete at all times. During

the concreting phase, the auger shall be rotated in the direction of boring.

Concreting will stop on completion of auger withdrawal. The Rig shall be

moved off the Pile position to allow the attendant excavator to remove all the

spoil from the top of the Pile and the Banksman to shall locate and clean the

concrete at the top of the Pile until clean concrete is visible.

REINFORCEMENT

The reinforcement will be delivered in straight lengths of reinforcement bar

and helical links and placed in a designated area as agreed with Aitch

Contractors Ltd. site management team. All reinforcement will be kept off the

ground.

This steel fixing station will have ‘tressels’ where the reinforcement will be

placed as the cages are fixed by the competent steel fixers. The steel fixers

will be working under the supervision of SUB-CONTRACTOR and will have

the relevant training cards, and will be briefed on this SUB-CONTRACTOR

document with sign-off of same.

The Banksman will ensure that the reinforcement is placed on the ‘stands’ or

‘tressels’ in a safe manner so the steel fixer can commence cage fabrication.

The steel fixer will fix the cages as per the design schedule. The Piling

foreman will inspect the cages after fabrication.

The cages will be lifted via the attendant excavator and lifting apparatus to a

storage area agreed with Aitch Contractors Ltd. with a slinger / banksman

present. All lifting equipment including chains, slings etc will be fully certified.

The lifting procedure will be in accordance with the Lifting Plan.

The reinforcement cage shall be inserted centrally into the wet concrete using

self-weight or mechanical assistance where necessary. The cage shall be

pushed flush with the finished concrete, or to the Pile toe, whichever is the

shorter. The cage should always be visible at the head of the Pile.

Debonding foam will be placed on the reinforcement cage projection bars if

requested and allowed for. SUB-CONTRACTOR cannot be held responsible

for debonding foam that slides off the projection bars during the concreting

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operation. Debonding foam is placed to ease the breaking down of concrete;

concrete will still need to be broken down by hand for at least the final 300mm

above cut off level without debonding foam (The use of mechanical crunchers

may snap off reinforcement projection bars and fracture the Pile shaft).

Mushroom caps will be provided and fitted to the top of all protruding

reinforcement projection bars.

When Piling operations have been completed the process shall be repeated

at the next Pile position. An exclusion zone must be maintained around

recently cast Piles for safety reasons.

Once the Piles have been trimmed to cut-off level, integrity testing may be

undertaken.

Throughout the Pile construction process, the appropriate construction and

inspection records and activities will be maintained in accordance with the

Safety Management System, Works Procedures and the Specification.

5.2. Location Plan

Site Address: Rothbury Road, Fish Island Hackney Wick

5.3. Pile Schedule

Sub-Contractor Schedule & Pile Layout.

5.4. Reinforcement

As detailed in SUB-CONTRACTOR Pile design calculations.

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5.5. Testing Regime

One set of 4no. Concrete cubes will be made per day for each Piling Rig by SUB-

CONTRACTOR. The Principal Contractor will supply an 110V outlet for the concrete

curing tank; failure to do so may result in low cube strength results.

Holliday Concrete Testing Ltd will perform the testing of concrete cubes and hold

UKAS testing accreditation.

Pile Integrity Testing - All Piles will be integrity tested after completion. No

Pile integrity testing shall take place under 5 days from the time of cast, and

may only be performed after the Pile has been satisfactorily trimmed for

testing purposes. The trimming is required to remove surface latency from

the Pile and should result in minimum damage to the piles.

(Main Contractor) is to arrange the integrity testing through Sub-Contractor

giving at least 48 hours notice.

6.0 Programme

The work will proceed generally in accordance with the Aitch Contractors Ltd.

Programme.

7.0 Quality

7.1. Safety Management System

The works shall be carried out compliant with the Safety Management System

(SMS). The SMS is a documented set of policies, and procedures which when

implemented satisfactorily will enhance safety performance thus leading to higher

efficiency and fewer accidents. The Safety Management System describes how the

Group Safety Structure works and is therefore a key to the success of the business.

The Safety Management System (SMS) is certified to the Occupational Health and

Safety Management System Specification OHSAS 18001:2007, which has been

developed to be compatible with ISO 9001:2008 Quality, and ISO 14001:2004

Environmental management system standards, in order to facilitate the integration of

Safety, Quality and Environmental management systems.

Parts of the Group Safety System also include Environmental and/or Quality

Management System requirements, and are therefore already ‘integrated’.

The Group is fully committed to supporting Industry and Client led Health,

Safety and Welfare programmes wherever they are established. The Group Safety

Management System will wherever possible, reflect those Health, Safety and Welfare

programmes.

The Board of Directors give their full support to the Safety Management System

(SMS) as it regards the Health and Safety of all people employed by the Group and

anybody else who may be affected by our activities, as being of paramount

importance. The SMS is defined in full in: Group Safety Manual

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7.2. Monitoring and Review

The responsibility for co-ordinating and implementing this Method Statement is that

of the Piling Project Manager, with the supporting supervisory personnel at the

activities monitoring the ongoing Piling processes and reflecting any changes

required throughout the contract duration. The Piling foreman and operatives will be

briefed by the Piling Project Manager prior to commencement of works.

Any non-conforming items identified during the contract period shall be addressed

as appropriate by non-conformance reports. Where corrective actions are

necessary, the Piling Project Manager shall be notified to ensure timely completion

of the contract stages to the agreed schedule.

8.0 Health and Safety

8.1. Induction

All labour will attend a Site Induction prior to work on the project. SUB-

CONTRACTOR will also hold internal inductions prior to work commencing. When

particular methods of working or additional hazards are identified for particular

locations additional inductions or Toolbox Talks will be held prior to work

commencing.

8.2. Daily Inspections

The nominated Site Supervisor shall complete checklists and working documents,

which shall be checked by the Piling Project Manager for their completeness and

accuracy. These are: - • Daily Rig Inspections

• Daily Plant and Machinery Inspections

• Daily Lifting Equipment Inspections

8.3. PPE

Correct types of branded PPE for all site employees shall be provided and worn as

required, they include:

• Hard hats, mandatory

• Hi-visibility vests, mandatory

• Safety Footwear, mandatory

• Safety Glasses, mandatory

• Gloves, mandatory/appropriate to the task

• Hearing protection

• Any other PPE deemed applicable to the works

When changing auger teeth, inserting auger, pins into auger head & saw cutting

heavy duty glasses will be worn. The operatives will have all of this PPE provided for

them by Sub-Contractor and each operative will be responsible for their own

particular PPE.

Additional items of PPE may be required for specific operations. Those items will be

identified and a briefing given as required. All PPE will to be fit for purpose.

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Correct issue and use of PPE for steel fixers is the responsibility of the

subcontracted company but will be monitored by SUB-CONTRACTOR.

8.4. Records

A copy of this Method Statement will be retained on site for inspection and will be

briefed to all site personnel, by the Piling Project Manager.

A record of all briefings will be kept on site in the Safety File.

8.5. Fire Extinguishers / First Aid

Fire extinguishers will be located in the Piling Rig and first aid kits located in the Site

Cabin.

8.6. Risk Assessment

8.7. Security

A specific risk assessment for the Piling works is detailed in Appendix B.

Security arrangements will be drawn up in conjunction with Aitch Contractors Ltd.

8.8. Welfare Facilities

Welfare facilities at the work will be provided by Aitch Contractors Ltd.

8.9. Emergency Call-out

Communication and emergency plans will be drawn up in line with Aitch Contractors

Ltd.

In the event of an emergency, the Site Manager will be informed immediately,

followed by the Group Health & Safety Department on.

• First aiders – First aider by Aitch Contractors Ltd.

• Emergency Contact for Environment Agency (0800) 80 70 60

• (Main Contractor) Site Environmental Manager – TBC

• If talking to the Emergency Services the site is at:

• Nearest Hospital with Casualty Department: Homerton University Hospital,

Homerton Row, London, E9 6SR.

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9.0 Environment

• Skips, water bowser and licensed carriers will be provided by Aitch Contractors

Ltd.

• Piling operations should take place only within specified working hours.

• General waste shall be deposited into designated skips.

• Hazardous waste, such as oil contaminated materials, used spill kits etc. shall be

disposed of by a licensed carrier.

• All vehicles shall not be run unnecessarily. Engines shall be turned off when not

in use.

• Fuel / oil spills shall be prevented. Drip trays and emergency spill kits shall be

used to catch and clean the spills / leaks.

• Concrete trucks will be washed out into a plastic lined concrete washout area

which will be replaced as required or emptied when 75% full by Aitch Contractors

Ltd. The location of these concrete washout areas will be advised at a later date.

• Wheel washing of vehicles will be carried out by Aitch Contractors Ltd.

• The Divisional Environmental Plan and Group Environmental Procedure –

Incidents and Non-conformances are in place to deal with any environmental

incidents and non-conformances.

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APPENDICES

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a. Risk Assessments

Piling Risk Assessment

Page 1 of 6

Location Rothbury Road Fish island Hackney Wick

RA # 00

Contract No. PPI0701 Revision 00

Activity affecting ( X appropriate box )

Employee X Third party X Vehicle X Plant X Property X CONTROL = LIKELIHOOD X SEVERITY

TASK / ACTIVITY

Hazard POSSIBLE CONSEQUENCES

PRE- CONTROL

CONTROL MEASURES RESPONSIBILITY

POST- CONTROL

ACCESS & GROUND

General Piling / setting up /

Boring

-Unstable Platform -Poor Work Area -Ramps

-Toppling of plant causing injury or death to persons in the working area. -Damage to nearby structures/buildings. -Falling due to trip hazards from uneven mat causing injuries. -Damage to Nearby trees

25

-Proper installation and maintenance of the piling mat C/O Aitch Construction Ltd, installed as per the piling platform design. -Piling platform to be designed to the BRE loadcases supplied, by a competent person. . WPC4 to be signed off prior to work commencing. -Mat to be visually inspected before work daily. Inspection to be recorded. -Avoid unnecessary tracking alongside existing structures and trees -all persons to hold relevant CPCS cards (tracked over 15 tonne piling machine) -Refer to method statement for all MANDATORY PPE on JM Piling sites.

Aitch Construction Ltd

/ SUB-CONTRACTOR

5

General Piling / setting up /

Boring

-Buried services -overhead services

-Auger or piling rig coming into contact with buried or overhead cables relating in serious injury or Death -Piercing a Gas pipe releasing harmful gases resulting in air pollution and inhaling Gas

15

-Live services survey to be carried out before piling commences/ C/O Aitch Construction Ltd. -All live services to be clearly marked and diverted if necessary C/O Aitch Construction Ltd -Barriers or Bunting to be in place to reduce the possibility of the piling rig from getting to close to overhead lines. Safe distances can be obtained by the power owners. -If a Gas main is pierced, site personnel are to follow Aitch Construction Ltd emergency evacuation procedures. -Refer to method statement for all MANDATORY PPE on JM Piling sites.


5

UNLOADING & DELIVERIES


Page 2 of 6

Offloading HIAB Lorries and arranging storage areas

-Plant movements -Lifting -Storage -Manual Handling

-Being struck / crushed by moving plant possibly causing fatalities. -Danger of slung equipment become uncontrolled and injuring personnel -Lifting without Mechanical Help possibly causing serious injury

15

-All person not involved in lifting/ unloading duties to be clear of lifting area -Qualified and competent Slinger only to attached and detach loads - lifting equipment to be certified and visual inspection carried out prior to use -All plant movements on site to be supervised by Slinger signaler -Any load that is deemed too heavy to lift shall be lifted using attendant excavator/HIAB. -Lifting to be carried out in conjunction with the Lift Plan -If lift cannot be carried out in conjunction with the Lift Plan the AP is to be contacted.

SUB-CONTRACTOR

5

Bringing

deliveries / Concrete

Wagons into and out of site

-Plant movements

- General public and site personnel being struck / crushed by moving plant possibly causing fatalities. -Vehicles being struck by moving plant

10

-All deliveries/concrete to be bought onto and out of site to be accompanied by Slinger Signaler at all times -Deliveries to enter site in accordance with the traffic management plan. - Aitch Construction Ltd to have in place traffic management plan and gate persons if necessary.

SUB-CONTRACTOR /


5

SITE WELFARE Site Cabins

-Cabin condition -Live power to the Cabin -Accessories in Cabin

-Inhaling harmful gasses causing sickness -Being electrocuted by live electricity possibly causing injury or death -Sustaining Cuts/Lacerations due to sharp edges. -Weils disease

10

-Facilities provided must be clean and appropriate for use -Cabins must be in well-kept conditions and be inspected regularly -All electrical appliances must be PAT tested before use. -All services to cabins must be properly installed and inspected C/O Aitch Construction Ltd to ensure no accidents occur. -All site welfare to be locked over night to ensure nothing gets tampered with when site is unoccupied - Aitch Construction Ltd to provide site welfare. -Ensure hands are washed before eating and keep all cuts covered up to reduce the chance contracting weils disease.


/SUB-CONTRACTOR

5

ENVIRONMENT


Page 3 of 6

Refueling / Greasing / Storage of

harmful materials

-Gas/Oil/Fuel

-potential run-off of harmful chemicals used in refueling and maintenance of the piling rig and equipment affecting the surrounding ground -chemicals running into watercourses resulting in water course pollution. -Leaking fuel bowsers/ COSHH stores resulting in harmful pollution

16

-Ensure the use of drip trays under all plant and materials that could develop a drip/leaks of harmful materials e.g. Fuel bowser, Agitator, Pump etc. -make sure field bowsers are visually inspected DAILY to identify any leaks or damage that could cause a leak. -Ensure all materials are kept as far away from standing water/ flood water/ rivers as possible to reduce risk of contamination. -Spill Kits must be in near vicinity to equipment that has the potential to cause a hazardous spill. -COSHH assessments must be consulted and the crew briefed before the task is undertaken COSHH assessments will outline the PPE required for the task.

SUB-CONTRACTOR

4

General / Pile Boring

-Noise -Working hours

-Noise of machinery can cause serious damage to hearing -noise in a sensitive community can cause disruption among local neighbors.

9

-Hearing protection must be worn when in the specified vicinity of the rigs (specified by noise assessments) -Working hours to be agreed with site Management

SUB-CONTRACTOR / Main Contractor

2

RIGGING UP / DE-RIGGING

Erecting the Piling Rig

-Machinery -Failure of the piling rig or its components resulting in serious injuries or death -getting trapped in moving parts causing serious injury

20

-The Piling Rig must be erected as stated in the manufacturers manual by competent persons -An experienced and CPCS qualified piling rig operative will be the only person permitted to operate the Piling rig. -12 monthly Thorough inspection certificates must be checked to ensure the test is in date. -The Rig pre-start checklist and daily/weekly checklist must be filled out and up to date -Any previous defects in the rig to be amended before commencement of work. -CPCS banksman must be present at all times

SUB-CONTRACTOR

5

Working at height

-Falling from height -when erecting the rig, the piling operative could fall from height and cause serious injury and endanger others around them

16

-Safety harnesses must be used when working at height and attached to a sturdy place. -A restraint lanyard must be used to restrict the piling operative coming to close to the edge of the rig -Harnesses must be thoroughly inspected and checked prior to use -Harnesses must be of correct fit

SUB-CONTRACTOR

8


Page 4 of 6

Working from MEWP

-Working from height -Falling objects -Toppling of Plant -Failure of MEWP

-Risk of falling from height causing Death or serious injury -Dropping objects onto people below MEWP causing serious injury -MEWP toppling causing serious injury/Death and damage to plant and nearby structures -Failure of MEWP causing toppling of plant, potentially crushing or trapping personnel

25

-MEWP must be tested every 6 months -Before use, test certificates and checks shall be carried out recorded daily inspection/prior to use inspection -All handrails shall be locked into place.- -If any damage to MEWP do not use and contact supplier -MEWP only to be used on firm level ground (piling mat area) -Harness to be used with fall restrain lanyard. -Harness to be used at all times and attached to the dedicated harness point. -If MEWP fails when a person is stuck at height emergency services should be called for rescue -Competent person only to operate MEWP - In case of MEWP failing whist carrying personnel. Somebody must be deemed competed to lower MEWP from the controls at ground level. If unable to do so 999 must be called to ask for fire and rescue.

SUB-CONTRACTOR

5

Replacing Teeth and

inserting Pins into Auger

Heads

-splinters of metal coming off Augers and teeth

-Tungsten may fracture when struck and seriously injure personnel.

16

-all changes to auger teeth/pins to be carried out using the following equipment; High impact eye protection, copper hammers, -all PPE must be worn correctly

SUB-CONTRACTOR

4

BORING OF PILES Operation of

Rig

-Improper operation of Piling Rig -moving rig unsupervised

-Improper operation of the piling Rig could cause serious damage to equipment and serious injury or death to personnel -Failure of the Piling Rig causing Damage to property or serious injury/Death -Crushing or making contact with people working around Rig

25

-Ensure all personnel operating the piling rig are CPCS qualified and deemed competent -Banksman to be clearly visible to Rig operative at all times -Piling rig to be Operated in conjunction with the operator manual -Banksman to be the only person to signal the movement of the Rig

SUB-CONTRACTOR

5

Open Bores

-Deep excavations -Open bores

-Falling down an open or recently concreted pile could cause serious injury or death. -Machinery toppling over after driving over an open bore

25

-All recently bored and concreted piles are to be covered with grates -Personnel not involved with piling should be segregated from the piling mat area. - Machine drivers shall back fill the open bore with hardcore to make them safe at the end of every day

SUB-CONTRACTOR

5

General Piling/Boring

-Uncontrolled personnel -Working near pathways -Public highways

-Injury to the public -Serious damage to nearby equipment/structures -Other tradesmen

12

-The site will have hoarding extending the full length of the affected area or, other methods of segregating plant from the public - Aitch Construction Ltd to have splash guards in place if there is a significant risk of falling debris to nearby buildings/pathways. -Safe systems of work to be identified in the method statement if working next to busy roads.


6

CONCRETING AND REINFORCING PILES


Page 5 of 6

Lifting reinforcement

cage

-Lifting of cages -Proximity of nearby buildings -uncontrolled personnel -Slinging of the load

-Piling operatives and/or uncontrolled personnel under slung loads -failure of lifting gear causing serious injury or death -Failure of piling rig Causing serious injury or death -Improper use of lifting gear causing loads to fall -Damage to nearby equipment and structures

20

-Operatives must refer to the lift plan before any lifts take place -If the lift cannot be carried out in accordance with the lift plan the AP must be contacted -Piling rig only to lift reinforcement cages -All other lifts to be carried out by attendant excavator and HIAB -See Method Statement for lifting tension reinforcement.


/ SUB-CONTRACTOR

5

Pouring and pumping concrete

-Concrete burns -Failure of Pump/Hoses

-If concrete comes into contact with skin it can cause serious injuries -If a concrete pipe were to burst it would cause serious damage to property, and could cause serious injury to personnel

16

-Consult method statement and COSHH assessments for working with concrete to get correct PPE. -Concrete pump shall be checked for the inspection records and test certificates -Concrete hoses and fittings should be visually inspected daily to check for any slices or damage to the outside -Concrete hoses to be double bagged. - The concrete pump shall be segregated from any persons not dealing with the concreting works -Vehicles shall not drive over concrete hoses

SUB-CONTRACTOR

8

GENERAL Welding /

cutting

-Welding equipment -Hot works -Abrasive wheels

-Welding equipment is extremely hot and can cause serious burns -Areas of rig being worked on can also become very hot and cause serious Burns -Due to the nature of the work a Fire could be caused resulting in serious injury or death -Mounting of abrasive wheels by untrained persons causing wheel to detach -Wheel guards being damaged or removed causing serious injury

20

-CITB and coded welder only -Correct PPE must be Worn (Fireproof overalls/welding mask) along with mandatory PPE requirements outlined in method statement. -When carrying out cutting or welding works are must be segregated and screened off. -Correct fire extinguisher to be kept in the near vicinity at all times -gas and oxygen to be stored separately -Trained operatives only to use Abrasive wheels -Ensure equipment is properly maintained and fit for purpose -Ensure correct type of blades are being used for the job -Ensure people around you are aware of areas being worked on

SUB-CONTRACTOR

5

Refueling / Cleaning /

Lubricating /

-Hazardous Materials

-Spillages can cause Serious burns / sickness / Headaches / breathing problems -Spillages(refer to environmental)

12

-Refer and comply with COSHH assessments provided in method statement, assessment to be briefed to all by foreman. -Wear correct PPE as identified in the COSHH assessment SUB-

CONTRACTOR

6


Page 6 of 6

General

-Fire -General Housekeeping

-Fire can cause serious injuries or death to personnel and damage equipment/structures inside and outside of site -Slips trips and fall can occur if work areas are left untidy. -Areas left untidy can also encourage fire

20

-Ensure correct fire extinguishers are supplied and in good working condition. If unsure of correct type for task, ask site management. -Ensure fire extinguishers are in date and fit for purpose. -Ensure all work areas are tidied throughout the day and at the end of every day -Ensure all rubbish is placed in correct bins at the end of every day

SUB-CONTRACTOR

8

General -Security of equipment and plant

-Unauthorized use of Piling equipment -tools left unattended could be picked up and used by unauthorized personnel

8

-Tools must be stored away properly when not in use and while on lunch/tea breaks -Ensure tools are not left anywhere where public can pick them up -Use cable mats where cables cross paths -Piling rig to be left Locked when not in use -No keys to be left in the Piling rig at anytime

SUB-CONTRACTOR

4

Steel fixing -Untidy work area -Manual Handling -Sharp edges

-An untidy area can cause slips trips and falls resulting in serious injury -Lifting heavy loads can cause injuries -Cuts and lacerations can be obtained from shard or protruding steel

16

-The work area should be cleared of obstructions and trip hazards -Collect excessive tying wire -Steel fixing tressels should be laid on firm level ground. -Stack reinforcement in agreed lay down areas. -Use barriers to segregate from other works -Use mechanical aids to lift steel bundles and heavy cages

SUB-CONTRACTOR

5

Setting out -Plant movement -Untidy work areas -Spray markers -Hammering in pins

-plant movement in the vicinity could seriously injure or cause a fatality -Slips trips and falls could occur if area is untidy -Fumes released from spray paint could cause headaches and sickness

20

-Ensure yourself and your EDM are in clear view and out of the route of moving plant. -Make plant operators aware that you are working in the area -Keep work area tidy at all times -Refer to COSHH for working with spray paint -Ensure Lump hammer is in good condition and that the head is secured.

SUB-CONTRACTOR

5


Page 7 of 6

NOTE:

Should any new scenarios arise that are not covered in this risk assessment, site management should be contacted

immediately and the task not be carried out until a specific risk assessment has been completed, issued and understood.

Severity of Hazard and Consequences

1 2 3 4 5

Likelihood of Occurrence

Extremely Remote – unlikely to occur 1 1 2 2 4 5

Remote – small chance that it will occur in time 2 2 4 6 8 10

Possible – chance that it may occur 3 3 6 9 12 15

Reasonable Probable – probably will occur in time

4 4 8 12 16 20

Almost Certain – likely to occur immediately or soon

5 5 10 15 20 25

b. Pile Record and Checklist Sheet

Pile No. Pile

Diameter Bored Depth

Concreted Depth Reinforcement

Depth of Casing Concrete Ticket Number

Standing Time (time & Reason) REMARKS

Total M Total Conc. Change in specified strata:

Digger in assist SIGNED FOR BY PRINCIPLE CONTRACTOR:

Yes:

reason:

No:

If 'no' give

c. Pile Rig Details

d. Lift Plan

Project Name

Work area covered by this certificate

(A sketch or marked up pile layout drawing may be attached to this certificate. Include haul roads and gridlines.)

Part 1 – WORKING PLATFORM DESIGN

Equipment to be used on site.

Soilmec SF50 CFA Piling Rig

Maximum plant loading

BRE Load Case 1: qlk = 167kPa, L1 = 2.24m, W1 = 0.7 m BRE Load Case 2: q2k = 277kPa, L2 = 1.27m, W2

= 0.7 m. (Note: BR470 ’Working Platforms for Tracked Plant: Good practice guide to the design, installation, maintenance and repair

of ground-supported platforms’ is available from IHS BRE Press – Tel 01344 328 038)

Designer Name

Tel No.

Designer Organisation

Is Testing Specified? Yes / No If ‘Yes’ Give Details:

Part 2 – VERIFICATION BY PRINCIPAL CONTRACTOR

The working platform detailed above has been designed, installed to the design and, if specified, tested to safely support the equipment detailed in Part 1 above. The limits of the platform have been clearly identified on site as necessary.

The working platform will be REGULARLY INSPECTED, MAINTAINED, MODIFIED, REPAIRED, and REINSTATED to the as-designed condition after any excavation or damage, throughout the period when the equipment is on the site. A completed copy of this certificate signed by an authorised person from the Principal Contractor shall be given to each user of the working platform prior to commencement of any works on site.

Name & Position

Date

Organisation

Signature

Working Platform Certificate (FPS/WPC/4)

Working Platform Regular Inspection Log The working platform has been inspected. All necessary maintenance, modification, repair or re-instatement of the working platform is to the asdesigned installed condition. If necessary, a revised Working Platform Layout Drawing has been issued to the specialist contractor.

Date Organisation Name & Position Signature Comments (include key details of alteration,

modification, maintenance, repair, date of next inspection, and whether or not revised

drawing issued etc. as appropriate)

Guidance on working platforms for tracked plant 1. Design

1.1. The HSWA 1974 and CDM Regulations 2007 require the Principal Contractor to appoint competent

Designers in respect of Working Platform design. This legislation explains how competence can be

assessed by reference to professional qualifications or professional memberships and by reference

to practical experience of the design of working platforms. Principal Contractors must be satisfied

that a competent Designer has been appointed by them in accordance with the relevant legislation

before they complete and sign the WPC. 1.2. The stability of tracked plant is fundamentally dependent upon the provision of a suitable and

sufficient working platform. It must be properly designed and installed to a recognised standard.

Whilst the same type of rig may be operated by different companies, the design bearing pressures

may differ due to the specific operating configuration of the rig and/or any modifications. Details of

the plant to be used and bearing pressures will be provided by the specialist contractor in advance

of work commencing. 1.3. Working platform design is extremely sensitive to the bearing pressure and type of fill used in the

platform. (For example, changing the angle of friction of the fill from 35 degrees to 45 degrees can

halve the platform thickness.) It is therefore advised that the Designer may have to adopt

conservative/cautious estimates of platform shear strength unless higher values can be

demonstrated by testing or with reference to appropriate published data. 1.4. The working platform must be free draining to prevent the build up of water and slurry. In the case

of fine-grained sub-grades, a separation/filter membrane should be installed beneath the platform

material to inhibit ‘pumping’ and infiltration of the fine-grained soils up into the platform material

during wet weather (which can impair platform performance and increase maintenance costs). 1.5. Proof testing of the platform can be carried out with a suitably sized circular plate subjected to the

maximum design loading. Such testing, as part of an appropriately designed testing regime, should

highlight any gross inconsistencies in platform performance. Potentially, significant savings in

platform thickness and cost may be realised by adopting a more detailed testing strategy. 1.6. The working platform must have a specified design life which starts before delivery of the piling

equipment and ends on completion of all piling works. This includes load testing, integrity testing,

investigation of non conformances and any remedial works.

1.7. The specialist contractor is to advise the Principal Contractor at the earliest practicable opportunity

should the specialist contractor become aware of any circumstances relating to the working platform

that renders it unsafe.

2. Installation 2.1. The FPS Working Platform Certificate is mandatory for all sites where a rig or attendant plant

operates. It must be signed by an authorised representative of the Principal Contractor. This

signature confirms that the legal duties required under CDM have been carried out. 2.2. If the working platform is to be constructed or removed in phases while piling works are ongoing,

then the extent of the platform must be clearly defined on the certificate and, in accordance with

good practice, physically on site. This is particularly important where the platform material is

removed from an area previously made available to the specialist contractor. 2.3. The working platform provides access for all plant deliveries, sub-contractors and personnel

associated with the specialist operations. Properly designed and installed the working platform

could also provide suitable and safe access for following trades for the whole project. 2.4. Poor definition of the edge of the working platform is a major cause of tracked plant instability. It is

good practice that the working platform should extend at least 2m beyond the pile position/edge of

the building to ensure sufficient safe working area for the specialists personnel and attendant plant.

Where having to work within this 2m zone is unavoidable the Designer is to be informed of the

requirement to design the platform for working up to its edge. 2.5. Where access ramps are used to move between working levels these must be of sufficient gradient

and width to allow the plant to move safely with the stability constraints of the machine. Ramps must

be in a straight line between working areas.Rigs and cranes cannot change direction on ramps.

Where a change in direction is required, this must be on a flat level platform.

3. Maintenance, modification, repair and reinstatement 3.1. The working platform must be kept free draining. Water and slurry which is allowed to build up on

the working platform can hide such hazards as recently constructed piles, trip hazards, uneven or

unstable ground, services and excavations. Slurry can be transferred to work equipment which

increases the risk of slips on steps as well as difficult handling of work tools.

3.2. Obstructions encountered during installation of the piling works will generally require excavation to

remove them. This can create a ‘soft spot’ which can result in the rig overturning. It is essential,

therefore, that any excavations made in the working platform are reinstated to the designed

standard, including any reinforcement and separation filter/membrane.

3.3. The working platform shall be subject to regular inspection by a competent individual appointed by

the Principal Contractor (e.g. the Temporary Works Co-ordinator) throughout its design life and after

any reinstatement or any works which might have modified it. Any damaged or inadequate areas

identified must be reinstated to the designed standard. Following the regular inspection, the Working

Platform Regular Inspection Log shall be signed by an authorised representative of the Principal

Contractor and issued to the specialist contractor with a layout drawing of the working platform

amended as appropriate.

4. Working Platform Layout 4.1. Items that must be included and properly located on the working platform layout drawing and be

notified by the Principal Contractor to the specialist contractor would include: detail of platform edges and 2m delineation, trial pits, services or voids, areas of backfilling, known underground basements; areas that are covered by the certificate or permit, test locations (if specified by the Designer of the platform) and any other feature that may affect the safety of operations.

f. Multi Site Environmental Impacts Checklist

or

If yes – what to do:

WATER:

Will any of the works be in, over, under or within 10 metres of watercourses or affect flood defences or a canal and/ or a towpath?

Contact Environmental Adviser. Consent is required. *

Will any wastewater (including from dewatering) be discharged to a river, stream, ditch, canal, pond, surface water drain or foul sewer.


Will any water be discharged onto grassland? Obtain landowners consent.

Inform Environmental Adviser.

Will water be taken from a watercourse, ditch, canal or pond? Contact Environmental Adviser. Consent is required. *

Will any polluted water need to be dewatered/ discharged? Contact Environmental Adviser.

Are there any watercourses, canals, ditches or ponds nearby that the works could affect?

Contact Environmental Adviser Environmental Do’s & Don’t’s.

WILDLIFE:

Will the works impact on a Site of Special Scientific Interest? Contact Environmental Adviser. Consent is required. *

Will the works affect any trees/ hedges? Will any hedgerows have to be removed?

Contact Environmental Adviser. Consent may be required. *

Are any nesting birds or other wildlife present or is there evidence of them? (badgers, bats, etc)

Contact Environmental Adviser. Consent may be required. *

Any invasive plants nearby? (eg Japanese Knotweed / Giant Hogweed) Contact Environmental Adviser Environmental Do’s & Don’t’s.

WASTE:

Anything being done with waste other than putting it back in the excavation or taking it off site for disposal at a licensed facility? (eg use of tarmac on third party land, chipping vegetation, crushing concrete etc)


NOISE:

Will there be any noisy activities in evenings, at night or weekends in a residential area?

Implement controls given in the: Environmental Do’s & Don’t’s.

CONTAMINATED LAND:

Does it look like contaminated land is present? (Badly discoloured soil or smells?)

Contact Environmental Adviser Environmental Do’s & Don’t’s.

ARCHAEOLOGY & HERITAGE:

Will the works affect a Listed Building/ Conservation Area/ Scheduled Ancient Monument or Area of Archaeological Importance?


CLIENT REQUIREMENTS:

Any specific environmental controls/ restrictions as a result of consents/ constraints imposed on Client?

Brief site staff and ensure they comply with these requirements.