4129 method statement 48 for sand compaction, hdpe sheet & armour rock ( sea side ) placing -...

TRANSMITTAL

(1) Contract No. : CPEPIICBIO 1 (2) Project Name : Colombo Port Expansion Project (3) Contractor : Hyundai Engineering & Construction Co., Ltd.

(4) To : CRE, Scott Wilson (5) COPY to : Project Director, Sri Lanka Ports Authority (6) Subject : Method Statement 48 for Sand Compaction, HDPE Sheet and

Amour Rock (Sea Side) Placing - Rev.1 (7) Conb.actors File No. : HDEC/CPEP/11/4 129

(12) Remarks : Further to our transmittal ref. No. HDEC/CPEP/1114078 dated 23rd February 2011. we hereby submit the revised "Method Statement for Sand Compaction,

The following islare submitted :

(1 3) Signed (14) Date : Osth March 201 1 (1 5) Name : Hvung Kim (1 6) Title : Proiect Director

Description (8) 1. Method Statement 48 for Sand

Compaction, HDPE Sheet and Amour Rock (Sea Side) Placing- Rev. 1

" Having checked this submission, I certifi that it confirms to the requirements o f the Contract in all respects, expect as otherwise indicated."

Transmittal No. (10) Document Date (9) 08'~ March 201 1

Employer's Representative's Comments/Response:

No. Copies (1 1) One (1) Copy

Attach additional sheets as necessary.

Signed : Date : Name : Title :

* Note :

M Management FI For information and by the Employer's Representative

D Design UR Upon Request

C Construction CR For Contract Records

E Environmental FS For Approval

S Survey FC For consent by the Engineer's Representative

Method Statement Register

HDECICPEPH012265 9.Jan.10 HDECICPEPH012451 10.Feb.10 Method Statements for CoreLoc Crack Repairing Using Epoxy

No Response

[Colombo Port Expansion Project IS r i Lanka]

HDECICPEP/l0/2280 12.Jan.10 Method Statements for Backfilling of Submarine Pipeline Trench t Method Statements for Submarine Pipeline Trench Badmlling for Hydro Test

No.

HDECICPEPHOR731 24.Mar.10 Method Statements for Demolition of Chain Link Fence

Method No. Method Description

No Response

HDECICPEPH012657 13.Mar.10 1 HDECICPEPHOR711 2O.Mar.10 1 No Response

I I 1 Wolk Finished

I I I Wolk Finished

Remarks

Submission I Revision

HDECICPEPH012750 27.Mar.10 Method Statements for Demolition of Existing SAGT Boundary Wall +-

0

No Resoonse -+

Ref. No. Date I Ref. No. Date I Ref. No. Date I Ref. No. Date

1

59

60

Conditionally Approved I 4

2

~e.~d statements for Secondary ~ ~ ~ k w a t ~ ~ ~ o c k placing (up to HDECICPEPHOI3178 10.Ju1.10

3

COLPOIMS1038

COLPO(MS1039

HDECICPEPH 114022 7.Feb.11 1 61 1 COLPOiMSRlO I Ch.5m, HIWi80101H140 5.Aug.10 I

62

63

HDECICPEPHOI3609 9.0ct.10 Method Statements for Quarry Run Filling under Wave Wall I 66 COLPOIMSB45 1 I

HIWI80102101252 10.Dec.10 Approved

Method Statements for Core-Loc Crack Repair Using Epoxy Filling

Method Statements for Secondary ~ e a b a t e r ~ u a y Wall ~ l m k Fabrication

65

Method Statements for Secondary Breakwater Construction (from

COLPOIMS,D41

C0LP01MS1042

C0LP01MS1043

Method Statement Register.xls - 4 1 4 - 201 1-03-08

HDECICPEPH012822 10Apr.10

HDECICPEPHOI3178 23.Jun.10

HIWI80101H 136 3.Aug.10

COLPOIMS1044

Method Statements for Secondary Breakwater Quay Wall Blod; Foundation

~ ~ t h ~ , j statements for ~ ~ ~ i l i t & ~ ~ of^^^^ ~~~d to secondary Breakwater Construction Site

~ ~ t h ~ d statements fw ~~~~~~l o f ~ ~ ~ , j ~ ~ t ~ r i ~ l ( ~ ~ ~ f 1 a 21 within Appmach Channel

HDECICPEPHOI3129 16.Jun.10

HIWi85107101147 10.Aug.10

HDECICPEPH013386 7.Aug.10

Method Statements for Secondary Breakwater Quay Wall Block Repair

Conditionally Approved


HDEC1CPEPfi013345 28.Ju1.10

HIWi80101101186 10.Sep.10

HDECICPEPHOl3405 11.Aug.10

HIW152iU1151 12.Aug.10

HDEClCPEPHOi3437 19.Aug.10

HIWI81102/01209 6.0ct.10

HDEC1CPEPH013438 lgAug.10 I

HDECICPEPHOI3439 19.Aug.10

HDECICPEPHOI3641 19.0ct.10

HIWi81102/01251 10.Dec.10

HIW180101101181 2.Sep.10

Rivision Requested


Approved

Add. Inform Required


Method Statements for

Sand Compaction, HDPE Sheet And Armour Rock (Sea Side) Placing

AHYUNDAI I W W E R ~ ) ~ ~ ~ T R C ~ M C O L T I I

Colombo Port Expansion Project Habour Infrastructure Works, Sri Lanka

Docu. No.

Rev. No.

Prepared Date.

Effective Date.

Method Statement for

Sand Compaction, HDPE Sheet and Armour Rock

(Sea Side) Placing

Department. : Planning I Construction Division.

Document No. : COLPOIMS1048 Rev.1 Date : 2011.03.08 Page : 1 of 31



(Sea Side) Placing

Document No. : COLPO/MS/048 Rev.1 Date : 2011. 03. 08 Page : 2 of 31

Revision Control Table.

Rev. Date Rev. No. Description of Revision. Remarks

2011.02.23. 0 First Issue.

2011.03.08 1 2.3.2 Grid of Vibro Compaction (page 9) – Grid pattern changed from isosceles triangle to equilateral triangle

2.4.8 (page 16) Field Welding Test changed into Field Welding Inspection

5.1 ITP (page 23,24) No. 2 & 4 Revised

5.1 ITP (page 25) No.9 Air pressure test changed into Field welding inspection



(Sea Side) Placing


CONTENTS

1 Introduction .................................................................................................................... 4

1.1 Purpose ........................................................................................................................................................ 4

2 Work Method ................................................................................................................. 5

2.1 Work Sequence .......................................................................................................................................... 5

2.2 Sand Compaction Sequence .................................................................................................................... 6

2.3 Sand Compaction Method ......................................................................................................................... 8

2.3.1 Deep Vibro Compaction .............................................................................................................. 8

2.3.2 Grid of Vibro Compaction ............................................................................................................ 9

2.3.3 Pattern of Probe Insertion and Pull-out ................................................................................... 10

2.3.4 Records........................................................................................................................................ 11

2.4 HDPE Sheet Placing ................................................................................................................................ 11

2.4.1 Preparation of Sand Slope and Geo-textile ............................................................................ 11

2.4.2 Roll Reception and Storage of HDPE Sheet .......................................................................... 12

2.4.3 Preparation of HDPE Sheet before Placing ........................................................................... 12

2.4.4 Deployment of HDPE Sheet Placing ....................................................................................... 13

2.4.5 Trial Welding ............................................................................................................................... 13

2.4.6 Field Welding – Fusion (Hot Wedge) Welding System ......................................................... 13

2.4.7 Field Welding – Extrusion Welding System ............................................................................ 15

2.4.8 Field Welding Inspection ........................................................................................................... 16

2.5 Bedding Layer, Rock (0.3~1.0 ton) and Armour Rock (3.5~6.5 ton) Placing ................................... 17

2.5.1 Material Requirement ................................................................................................................ 17

2.5.2 Bedding Layer and Rock (0.3~1.0 ton) Placing ..................................................................... 18

2.5.3 Armour Rock (3.5~6.5 ton) Placing ......................................................................................... 18

3 Quality Control ............................................................................................................. 19

4 Safety .......................................................................................................................... 20

4.1 General Safety .......................................................................................................................................... 20

4.2.1 Heavy Equipments. .................................................................................................................... 20

4.2.2 Vibrators / Generators / Water Pumps / Power Tools ........................................................... 20

5 Inspection & Test Plan ................................................................................................. 22

5.1 Inspection & Test Plan ............................................................................................................................. 23

Attachment #. 1 ............................................................................................................... 27

Attachment #. 2 ............................................................................................................... 29



(Sea Side) Placing


1 Introduction

1.1 Purpose This document outlines the work methods for sand compaction for road construction up to main breakwater Ch.4,200 and, HDPE sheet & armour rock (sea side) placing.



(Sea Side) Placing


2 Work Method

2.1 Work Sequence Below is a flow chart of normal work procedure for sand compaction, HDPE sheet and armour rock placing.

HDPE Sheet Placing

Start of Work

Sand Compaction (Vibro-Hammer)

Bedding Layer Placing

Rock (3.5~6.5 ton) Placing

Rock (0.35~1.0 ton) Placing

Process Finish

Preparation of Sand Slope

Compaction Test



(Sea Side) Placing


2.2 Sand Compaction Sequence The compaction is required within the road boundary of breakwater up to Ch.4,216 which is consist of wide road and narrow road as shown in Fig.2-1. The wide road section is up to Ch.2,000 and the narrow road section is from Ch.2,000 to Ch.4,216.

[ Fig. 2-1 ] Plan of Breakwater and Compaction Sequence The subgrade and fill material beneath the pavement should be compacted up to required degree of compaction to support traffic load on the pavement and prevent additional long term settlement. The hatched compaction areas in Fig. 2-2 and Fig. 2-3 sufficiently cover the traffic load distribution area beneath the load area. The compaction will be carried out in the order described in Fig. 2-1 ① Ch.800 ~ Ch.1,500 ② Ch.1,500 ~ Ch.1,900 ③ CWA ~ Ch.800 ④ Ch.1,900 ~ Ch.3,100 ⑤ Ch.3,100 ~ Ch.4,216



(Sea Side) Placing


[ Fig. 2-2 ] Sectional View of Compaction Area for Wide Road (~Ch.2,000)

[ Fig. 2-3 ] Sectional View of Compaction Area for Narrow Road (Ch.2,000~Ch.4,216) For Area 1 (Sequence ① and ②), the area is filled with sand up to around +4.5 m ~ +5.0 m level and used for the access road. As for each 100 meters from Ch.1,500 toward Ch.800, one half (sea side) of full width will compacted and the other half (land side) will be used for access road. After sea side half is compacted, it will be used for access road and land side will be compacted contrarily. It will be repeated by turns for each 100 meter. For Area 2 (CWA~Ch.800, Sequence ③), the area is filled up to +3.0 m and the Core-Loc units are stored at both sides of access road. The stored units will be removed from existing location for placing before the compaction of area 1 is finished.



(Sea Side) Placing


Then sand which was pumped and stored within CWA will be transported by dump truck and the sand embankment will be prepared for compaction up to the level below the final road surface by 0.2 m for one half of the full width. After the compaction for one half up to Ch.800 is finished, the other half will be filled with sand up to the level below the final road surface by 0.2 m and compacted. For Area 3 and 4 (Sequence ④ and ⑤), there are rock stockpiles along the road line. When the stored rock is removed, the sand will be filled up to the required level by pumping of dredgers. When the sand embankment is prepared, it will be compacted.

2.3 Sand Compaction Method Deep compaction by vibrating H-beam will be carried out at the formation level after hydraulic filling. There are several factors affecting efficiency of vibro-compaction such as capacity of vibro-hammer, frequency of vibration, shape of vibrating probe, time period of vibration, number of penetration and extraction, spacing of compaction point and so forth. In order to determine the factors, the trial compaction was carried and proposal for compaction method and alternative acceptance criteria of sand compaction was submitted with transmittal No. HDEC/CPEP/11/4103. Top 45 cm surface layer will be compacted by vibrating roller at formation level. The requirement of insitu density for this layer will be discussed further with the Engineer. The capacity of roller and number of trips also will be decided through trial compaction and discussion with the Engineer. CPT (Cone Penetration Test) will be used to check the degree of compaction for deep sand compaction area. The correlation between the cone tip resistance (qc) of CPT and relative density was developed through trial compaction and proposed as a alternative acceptance criteria of sand compaction. 2.3.1 Deep Vibro Compaction The deep vibro compaction work will be carried out using land based equipment as follows and in the photograph below;

Vibro-hammer : weight 11 ton, electric power capacity 340 kW Crawler Crane : 70 ton Generator : 200 kVA Water Pump : 3” H-Beam : 55 X 64 X 13, 6 m



(Sea Side) Placing


2.3.2 Grid of Vibro Compaction At the beginning, the compaction work will be carried out with 2.5m spacing in equilateral triangular patterns as below.

[ Fig. 2-4 ] Grid of Vibro Compaction

Vibro-Hammer

Crane

H-Beam

Generator

Water Supply



(Sea Side) Placing


To form a vibro compaction point, the H-beam gripped with vibro-hammer will be placed over the selected position by means of a crawler crane. After starting the motor of the vibro-hammer, water will be discharged from 4 pipes which are installed on each side of the H-beam and the beam will be slowly lowered. In the immediate vicinity of the beam head, the sand will be saturated with water inducing local and temporary liquefaction of the soil under the influence of the vibration. 2.3.3 Pattern of Probe Insertion and Pull-out When the desired depth of penetration is reached, the downward movement of the beam will be stopped and upward movement started. When the embedded length of beam reaches 1 m, downward movement of beam will resume and pulled out after beam touches the desired depth. The patter of probe insertion and pull-out is given in the sketch below.

[ Fig. 2-5 ] Pattern of Probe Insertion and Pull-out The compaction duration at each compaction point will be min. 4 minutes and the water will be jetted continuously during compaction. Generally the effect of the compaction becomes visible at the ground surface in the form of a cone shaped depression. The depression formed around the compaction point will be leveled by trimming and grading up to the level slightly higher than the sand formation (+4.5m) and compacted with vibro-roller.



(Sea Side) Placing


For the proper compaction of both slope areas, there will be additional filling by 0.5m width and it will be trimmed to the design profile by back-hoe after vibro compaction is finished. 2.3.4 Records Daily report and daily compaction record will be kept and submitted to the Engineer for information and review. Daily compaction record form is attached as attachment #.1

2.4 HDPE Sheet Placing 2.4.1 Preparation of Sand Slope and Geo-textile The surface will be prepared with back-hoe, prior to the HDPE sheet installation, according to the executive design guidelines. The surface shall be smooth and free of sharp objects and stones, free of all foreign and organic material and debris of any kind.

[ Fig. 2-6 ] Preparation of Sand Slope



(Sea Side) Placing


The geotextile shall be unfolded and spread over the slope. The length of geotexte spread on the slope shall be more than one (1) meter. One recommends that the HDPE sheet be installed immediately after slope preparation to avoid deterioration caused by rain, wind, lost of moisture or local traffic. 2.4.2 Roll Reception and Storage of HDPE Sheet The rolls unloading shall be done with equipment that ensures its security transportation. When the rolls delivered and unloaded at the site, they will be inspected visually. The external roll side shall be free of holes, tears and bubbles. The technical data of HDPE sheet (Geomembrane) is attached as Attachment #.2 The rolls shall be stored on the smooth ground without excessively hot or moist condition. Sharp objects or anything which may puncture the sheet shall be removed. Under standard weather condition, the storage of HDPE sheet does not require special treatment. 2.4.3 Preparation of HDPE Sheet before Placing The required length of each chainage of breakwater is summarized as below;

ChainageKerb

Level

Kerb

Height

HDPE

upper

level

HDPE

lower

level

HDPE

Height

HDEP

Slope

Length

HDPE

upper

Length

HDPE

LengthRemarks

Ch.0 ~ Ch. 1,100 5.00 0.575 4.425 1.5 2.925 5.896 0.7 6.596

Ch. 1,100 ~ Ch. 1,780 5.00 0.575 4.425 1.5 2.925 5.896 0.7 6.596

Ch. 1,780 ~ Ch. 2,570 5.83 0.575 5.255 1.0 4.255 8.576 0.7 9.276

Ch. 2,570 ~ Ch. 4,250 5.50 0.575 4.925 2.0 2.925 5.896 0.7 6.596 The width of HDPE sheet delivered to the site is 6 meter. Therefore, before placing the sheet on the slope, additional length shall be welded at the storage yard or on the embankment near the slope. The HDPE sheet will be delivered with 7 meter length in the future to minimize welding joint.



(Sea Side) Placing


2.4.4 Deployment of HDPE Sheet Placing Initially, the HDPE sheet will be placed at 30m interval, longitudinally and the interval may be adjusted later. All machines or equipment to be used for HDPE sheet placing shall be in appropriate manner to prevent the sheet from any damage, extension or wrinkles. Adequate temporary anchoring (sand bags or tires), that cause no damage to the HDPE sheet, may be placed to prevent uplift by the wind. Welding should be performed as soon as possible after the sheet is placed. 2.4.5 Trial Welding Trial welding will be done to verify the equipment and the operator. This verification shall be made prior to the main field welding. Trial welding will be done under the same conditions as actual welding. The trial welding will be carried out under the supervision of manufacture. The welding overlap shall be over 10 cm for hot wedge welding and over 7.5 cm for extrusion welding. In cases of “fish mouths” or wrinkles at the seam overlaps, they shall be cut along the ridge of the wrinkle, in order to achieve a flat overlap. The HDPE sheet portion cut shall be welded and any portion where overlap is inadequate shall be patched with an oval or round patch of the same HDPE sheet, extending a minimum of 15cm beyond the cut in all directions. 2.4.6 Field Welding – Fusion (Hot Wedge) Welding System There are several different types of field welding equipment available. The fusion (hot wedge) and the extrusion welding methods are used for HDPE sheet welding. Hot wedge welding is the primary method for panel seam and extrusion for HDPE insert liners and repairs. Fusion (Hot Wedge) welding is the primary welding method. Hot metal wedge shall be heated to the required temperature and used to melt the overlapped facing surfaces then they are pressed together with two nip/drive rollers to create a permanent bonding structure. Welding temperature setting is recommended at 325~400℃, upon the thickness of HDPE sheet. Weather condition (e.g. temperature, sunshine, and wind) shall be taken into consideration as well.



(Sea Side) Placing


Turn off the motor before placing the overlap in the wedge and roller. After the overlap to be welded is properly positioned, turn on the motor and lock the seam in position. The welding machine shall be aligned and set to the adequate temperature, the travel speed of welding machine is set depending on the thickness of sheet and weather condition.

[ Fig. 2-7 ] Typical double fusion hot wedge weld detail The welding operator shall take care of welding machine for temperature and speed control to maintain a consistent weld. A small amount of squeeze-out is a good indication that the proper welding temperature has been set. The melted material will lately be extruded out of the welding area. If there appears an excessive amount of hot extrusion, it indicates that the temperature or pressure is too high and needs adjustment. For the 1mm or less thickness sheet, if there shows a long, low, sinusoidal wavelength pattern in the direction of the welding, it indicates the proper seaming. If the wave peaks are too close, the seaming speed shall be increased until an acceptable pattern appears. The absence of the wave length indicates that the seaming speed shall be decreased. There will be no wave pattern for the thickness greater than 1mm because of the inherent stiffness. Nip/Drive roller marks will always show on the welding track surface, they are noticeable and slightly embossed.



(Sea Side) Placing


Daily checking and cleaning of welder are required. 2.4.7 Field Welding – Extrusion Welding System Extrusion welding is primarily used for repairs, details (e.g. piping or trench) and T welding. The welding rods, with 4mm or 5mm diameter, which are made of the same material as the HDPE sheet, are extruded by the extrusion welder and pasted along the overlapped seam. Preheating of the sheet in the welding area is performed by the extrusion welder.

[ Fig. 2-7 ] Typical Extrusion weld detail The welding area shall be dry and clean. The HDPE sheet surface shall be slightly ground to remove the oxidized layer or other foreign materials. Grinding depth shall not exceed 10% of sheet thickness. Grinding width shall match extruder, and not exceed either side of the extruded. Welding shall be conducted right after grinding, no more than 30 minutes. Use hot air welder or other equipment to tack two sheets binding together. Excess heat could damage the upper sheet and shall be avoided. The extrusion welder shall purge all degraded material in the barrel for approximately 30 seconds before welding. The purge material shall not be discharged on the surface of the sheet.



(Sea Side) Placing


The overlap thickness shall be approximately twice of the sheet thickness, measuring from the upper surface of the bottom sheet to the top of the extrusion. A small amount of squeeze-out appearing on two sides of welding track is allowed. If the amount of squeeze-out is too much, lower the extrusion welder temperature setting or increase the welding speed. If interruption is necessary during the welding process, trial-off the extrusion shall be applied gradually instead of stopping instantly. To re-launch the welding process, the continued area shall be ground before welding. To perform repairs, piping, other accessories, T welding and Y welding, follow the above procedures. The welding shall be done vertically up and down the slope. The overlaps between panels shall be over 10 cm for fusion welding and over 7.5 cm for extrusion welding. Before welding start the overlaps shall be dry and clear. 2.4.8 Field Welding Inspection All field welding shall be inspected by the engineer visually. The clear nip/drive roller marks certify the quality of welding and the Engineer can check the roller marks run out of the overlap edge.



(Sea Side) Placing


2.5 Bedding Layer, Rock (0.3~1.0 ton) and Armour Rock (3.5~6.5 ton) Placing

After HDPE sheet is placed and tested, remaining rock such as bedding layer, rock (0.3~1.0 ton) and armour rock (3.5~6.5 ton) will placed as per the drawing and specification.

[ Fig. 2-9 ] Rock Placing Sequence 2.5.1 Material Requirement Quarried rock to be used in armour, underlayers shall be free from any defects which could lead to breakage during loading, unloading or placing. All Quarry stones shall be prismoidal in shape. Within each class, no stones shall have a length to thickness (l/d) ratio greater than 3 and not more than 50% of stones shall have a l/d ration greater than 2, where the length (l) is defined as the greatest distance between two points in the stone and the thickness (d) as the minimum distance between two parallel straight lines between which the stone can just pass. Quarried rock to be used in armour, underlayers shall be subject to the following limits;

Apparent Relative Density (BS812 : Part 2) > 2,650 kg/m3



(Sea Side) Placing


Water Absorption (BS812 : Part 2) < 2 % Soundness (BS812 : Part 121) MgSO4 < 12 % Either : Aggregate Abrasion (BS 812 : Part 113) < 15 % Or : Los Angeles Abrasion (ASTM C-535) < 18 %

2.5.2 Bedding Layer and Rock (0.3~1.0 ton) Placing After HDPE sheet is placed and the test result is accepted, the 0.5 m thick bedding layer and 1.0 m thick rock (0.3~1.0 ton) will be placed by back-hoe from sand embankment layer by layer. The HDPE sheet shall not be damaged during the bedding layer and rock placing. The profile of each layer will be inspected respectively. 2.5.3 Armour Rock (3.5~6.5 ton) Placing After Rock (0.3~1.0 ton) profile is accepted, the armour rock (3.5~6.5 ton) will placed. Initially, armour rock will be supplied to the placing location, over the surface of rock (0.3~1.0 ton) layer by crane using wire net. Then, standard back-hoe will climb over the armour rock and place the armour rock as per the drawing.



(Sea Side) Placing


3 Quality Control

The construction engineer will be responsible for maintaining QA/QC aspect and he will manage overall construction according to the approved drawings, specifications, method statement and programme. Prior to every special activity, Inspection/surveying will be arranged for the consent to approval of Engineer’s representative.



(Sea Side) Placing


4 Safety

The Contractor has submitted “Health and Safety Plan” and will carry out safety control according to the health and safety plan

4.1 General Safety

All land-based equipment to be used at the site shall have obtained a suitable certificate. All personnel will be instructed in safe working procedures by the Safety Officers. The Construction Engineer is responsible for the implementation of the approved safety procedures throughout the construction period and ensures that all personnel are issued with the proper safety gears/instructions. Safety Supervisor will be nominated to ensure the implementation of safety aspects by all employees when performing their duties.

4.2 Sand Compaction

4.2.1 Heavy Equipments.

All construction equipment and vehicles will be inspected before each use

and all deficiencies corrected, prior to operate. Safe working Loads, recommended operating speed within HDEC and

special hazard warning will be conspicuously posted on all equipment and be visible from the operator’s station.

Prior to initial use and on a daily basis, all lifting accessories will be inspected and defected equipment removed from service immediately.

Where manual (hand) signals may be used, only one person will be designated to give signals to the operator and called rigger.

A flag person (signalman) will be provided when operations or equipments on or adjacent to a highway create a traffic hazards.

4.2.2 Vibrators / Generators / Water Pumps / Power Tools

Tools having defects or render those unsafe will be removed from service. Portable power tools require industrial socket. Completed electrical installations must be inspected and tested prior to use Ensure all power supply systems are completely safe.



(Sea Side) Placing


Earthling rods, must be used to prevent electrical shock from the cables of

machines

4.3 HDPE Sheet placing

All welding equipment will be inspected daily. Defective equipment will be removed from site.

High temperature works (Hot Work) will be supervised by Safety Staff and permission must be obtained from the HSE manager.

Each welding or cutting will be equipped with compatible fire extinguishers. Suitable eye protection will be worn to prevent eye injuries while welding

and cutting.

4.4 Amour (Rock Sea Side ) Placing

All outside dump truck may be good condition. All personnel working near shoreline will wear the life jacket. When transporting amour rock loads they will be adequately secured

against displacement. Established job site speed limits, posted speed limits and traffic control

signs will be strictly obeyed. All vehicles and equipment must have a back up alarm installed. A flagman (signalman) is required to aid in reversing vehicles or equipment.



(Sea Side) Placing


5 Inspection & Test Plan

Inspection and Test Plan for sand compaction, HDPE sheet and armour rock placing is attached as below.



(Sea Side) Placing

Document No. : COLPO/MS/048 Rev.1 Date : 2011. 03. 08 Pate : 23 of 31

5.1 Inspection & Test Plan ITP reference: Revision: Date of issue: Page

TITLE: DRAWING Nos/ DOCUMENT REFERENCES:

Test and Inspection Codes:

Method Statement and the Specification

S = Surveillance – Record as Diary Entry etc.I =Inspection – work continues – Signed Record

WORK BY: W = Witness inspection or test – Signed Record H = Hold Point – Stop work until seen – Signed Record

R = Records Review – Signed Record per package

OP. No.

Operation to be inspected or tested

Operation Controlled

by: (position)

Accept / Reject Criteria Frequency of inspection or test

Reference to Standard,

Specification, Procedure,

Method Statement etc.

Quality Records required

(Certifying document)

Test/ Inspection Codes

HYUNDAI SCOTT WILSON

1 Approval of Vibrating hammer

Hyundai

Minimum weight – 11 tons, Minimum electric power capacity – 340kW

Before initial use Method Statement

Manual of the machine H I

2 Marking of the grid before compaction

Hyundai

2.5m x 2.5m equilateral triangle

Every section before compaction

Method statement

RISC

I I

3 Time recording during compaction Hyundai

Minimum of 240 seconds

Every point Method statement

Recording sheetI S



(Sea Side) Placing


OP. No.



by: (position)









4 CPT for check the compaction (+0.40m - +4.05m)

Hyundai

Depth(m) qc (Mpa)

0.5~1.0 6.0 1.0~2.0 8.0 2.0~3.0 10.0 3.0~4.0 12.0 4.0~5.0 15.0

For wide road 1 test for 18.82m x 30m section

For narrow road 1 test for 18.14m x 30m section

Method statement

RISC, and test report

H I

5 Compaction check at Top 0.45m layer Hyundai

To be decided To be decided - RISC and Test reports H I

6 Preparation of sand slope before placing HDPE sheet Hyundai

Slope should be 7:4

Free from sharp objects

HDPE sheet to be placed in every section

Design Drawings and Method statements

RISC

H I

7 Geo-textile placing over the slope before HDPE sheet placing Hyundai

Spread on slope more than 1 m

Every section Method statements

RISC

H I

8 Overlap for sheet welding

Hyundai

For Hot wedge welding – Over 10 cm

For Extrusion welding – Over 7.5 cm

Every welding section

Method statements

RISC

H I



(Sea Side) Placing


OP. No.



by: (position)









9 Field Welding Inspection (Visual)

Hyundai

Clear nip/drive roller marks certify the quality

Method statements

RISC

H I

10 Armour Rock Material Approval

Hyundai

Grading Test Shape Test Density > 2650 Kg/m3 Water absorption<2.5%

Point load >5 Mpa

LAAV<18%

MBA < 0.7/100g

Soundness < 12%

Every 25000 ton Every 5000 ton Every 25000 ton

Every 50000 ton

Every 50000 ton

Every 25000 ton

Every 50000 ton

Every 50000 ton

Specification

7.031

Test Report and RISC

H I

11 Final Inspection of Bedding material layer

Hyundai

Slope and thickness according to the design Drawings

Every section before proceed next step

Design Drawings

RISC

H I

12 Final inspection of 0.35~1.0 ton layer

Hyundai



Design Drawings

RISC

H I



(Sea Side) Placing

Document No. : COLPOIMS1048 Rev.1 Date : 2011.03.08 Pate : 26 of 31

Accept I Reject Criteria



by: (position)

Hyundai


13

Approved by:

J. S. Kim

Date:

~b*f+

Construction Manager .

Final inspection of 3.5-6.5 ton layer

Prepared by:

J.S. Yu

Date:

/ Construction Engineer

Frequency of inspection or test


Checked by:

K.C. Kim

4 Date: 06 pflc -11

Quality Control Manager


specification, Procedure,


Design Drawings

Quality Test1 Inspection Codes

Records required

(Certifying document) HYUNDAI SCOTT WILSON

RlSC

H I



(Sea Side) Placing


Attachment #. 1

Daily Compaction Record Form



(Sea Side) Placing




(Sea Side) Placing


Attachment #. 2

HDPE Sheet Technical Sheets



(Sea Side) Placing


4129 method statement 48 for sand compaction, hdpe sheet & armour rock ( sea side ) placing -...

Documents

method description

response method statements

d41 method statements

colpoims1038 method

revised method statement

mcoltii method statement

hydro test method statements

document date