study on construction of metro rail station

e-ISSN: 2582-5208 International Research Journal of Modernization in Engineering Technology and Science

Volume:03/Issue:04/April-2021 Impact Factor- 5.354 www.irjmets.com

www.irjmets.com @International Research Journal of Modernization in Engineering, Technology and Science

[1321]

STUDY ON CONSTRUCTION OF METRO RAIL STATION

Shreenithis L*1, Vennila G*2 *1Final Year Student, Civil Engineering, K S Rangasamy College of Technology, Tiruchengode, Tamilnadu, India.

*2Professor, Civil Engineering, K S Rangasamy College of Technology, Tiruchengode, Tamilnadu, India.

E-mail: [email protected]

ABSTRACT

The project enables me to gain knowledge that is more practical and to acquire industry-based skills.

The Training consists of site supervision of various recent projects undertaken by the company in and around

the Chennai district. The company has ongoing construction works on two sites in Chennai region. The project

work undertaken by the company is the Construction of Chennai Central Square of plinth area 384 sq. m and

the second region is in Shenoy Nagar, In that area they where doing construction of park, parking and mall and

above the metro rail station the plinth area 20780 sq. m the work that was undergone during the period of

training. The works undergone are pile foundation on one side part work and another side concrete slab work

is going on. In this training period gained the knowledge about the actual conditions of the site, the problems

faced at site and the strategy used to deal the problems in practical.

I. INTRODUCTION

The site of construction is metro rail station at Chennai in this training period I have attained technical

knowledge during the course time, after which was able to compile as a report. The report consists of brief

study description of work in construction. The best to elaborate the actual site condition and problem faced at

the site and the tactics used to deal with them. The main objective of this report is to present a systematic text

on the execution of construction and added the summary of the training program and training schedule.

II. MODERN PLANS ADOPTED

Study Of Plan And Methodology

During the first 2 days study the key plan of diaphragm wall, pile foundation, the methodology and IS

codes has been used for pile foundation and the diaphragm wall and the reinforcement for the diaphragm wall

and pile foundation are given below. There have been 97 pile foundation of the as column as shown in the

figure 1

Figure 1: Columns Position

http://www.irjmets.com/

mailto:[email protected]




[1322]

Sequence For Plunge Column Installation Work

1. Prepare site for Rig moment

2. Fixe pile point by surveying

3. Bore drilling up to required depth (as per GFC)

4. Pile base cleaning by bailer (bucket)

5. Fabricate plunge column as per approved GFC drawing

6. Fabricate reinforcement cage as per approved GFC drawing

7. Lower rebar cage and hanging on casing

8. Lower plunge column with rebar cage (welded together )as per GFC drawing

9. Lower tremie (2 set ) outside plunge column

10. Place concrete –M40 up to 1 m above cut off level (-21.575)level

11. Back fill with M5 concrete from cut off level to B1 slab with sand from B1 ground floor level

12. In fit M70 concrete

Tools Used For Pile Foundation

1. BG 36 hydraulic rotary rig with casing adopter arrange met

2. RCD (reverse circulation drilling)

3. 150t and 50t crane with necessary hook arrangement

4. Polymer mixing unit

5. Slurry test equipment, 1) mud balance , 2) marsh cone ,3) PH meter

6. Cutting and bending machine

7. Welding machine ( MIG and stud )

8. Guide casing pipe

9. Total station

10. Vertical pump

11. Sounding chain

Rotary Drilling Rig

The rig that has been used to drilling the hole for the pile foundation there has been 97 plunge column

in that they been using for three types of drilling bit is been there

1. Soil bucket drilling

2. Auger drilling

3. Core barrel drilling

There has been taken photo and the reference photo is been given below as in figure 2 drill bit is been

going inside, in figure 3 taken out with the soil bucket ,in figure 4 there has been size of the rig and figure 5 rig

features of the rig

In this drilling we want to use the polymer the density has to been 1.00to 1.01 it has to be

concentration at the level of < 1.04 viscosity has to be 55 to 140 before concentration 50 to 140

Figure 2: Polymer Poring Figure 3: Soil Bucket





[1323]

Figure 4 RIG BG 36 Length, Width And Height

Figure 5: RIG BG 36 Parts and Power

Reverse Circulation Drilling Rig

The RCD (reverse circulation drilling) is been used for the fastest drilling bit than the normal drilling

rig and it has three type of drilling bit in this they use the air pressure and water for the rotation in this method

we don’t need of the polymer the three type of drilling bits

1. Tooth cutter

2. TCI button cutter

3. TCI button disc cutter

There has been taken photos and the reference photo is been given below as in figure 6 types of drill

pit is given, in figure 7 the main drill bit putting inside of the casing, in figure 8 the RCD is on the first stage on

the casing and figure 9 RCD type and features is given





[1324]

Figure 6 RCD Drill Bit Size Is Used

Figure 7: Main Drill Bit Going Inside Figure 8: RCD Drill

Figure 9: RCD Drill Types





[1325]

Ground Floor Concreting

In this concreting they were leveling the soil and they were using plain cement concrete as for the base

and then they use 12mm thickens of plywood for separating the plain cement and ordinary cement concrete

and they were using lap joint as coupler

Step That Have Been Processed

1. They have been using bending machine and cutting machine form steel reinforcement

2. As size of design they form the reinforcement

3. In that point they want joint more they use threading machine and coupler joint as lap joint

4. By using air pressure pumping machine the clean the concreting inside area

5. By using the concrete pumping and mix of concrete they poor concrete

In given below figure 10 pump that has been used for concreting and in figure 11 lap joint and coupler

and threated steel bar

Figure 10 Concrete Machine Figure 11 Threaded Area

And Coupler

Site 2 Plan And Two Wings

The site 2 plan is been divided in two wings as mirror the total 20870 sq.m the plan have 800mm

thickness of diaphragm wall as 912 RMT there were 102 piles is been there and 627 soil anchors it is been start

in 31 July 2018 it is been construction on shenoy metro station is been running under ground as for services in

the two wings there been divided in to four zone in figure 12 is been called as the east wing of the upper

basement in figure 13 its been called as the west wing upper basement in this project value is been taken as

170 cores project, project finish date as per addendum 29 May 2021.

Figure 12: East Wing Column Position





[1326]

Figure 13: West Wing Column Position

Soil Anchors

It is been used for structures support it has been 627 is been added on basement for 60 m depth on the

sand the components is been used for the soil anchors it is been constructed by the reference IS code (IS

10270:1982)

By using the MGJ 50 machine fix that machine in the soil anchor area and drilling inner and outer

casing in to the ground as vertical for every 2m they has to be extend the inner and outer casing pipe and filling

grout through inner casing in to bore hole by doing this they remove the inner casing of every 2m and installing

the tendons then remove of outer casing while pressure grouting the fixed anchor length were testing and pre

stressing of anchor there has been elongation after 24 hrs they check the elongation as per the calculation In

figure 14 the steel standard, anchor wedges, anchor key plate and base plat and the given figure 15 is been

taken from site of east wing

Figure 14 Parts Of Soil Anchor Figure 15 One Of The Soil Anchors

PT SLAB

PT slab is been used in the Shenoy Nagar as the main slab it been used for the reducing of the steel in

the concreting slab it will give more strength than the steel reinforcement in figure 16 the concreting of post

tension slap and vibrator used and in figure 17 the layout of the post tension strand and form work for strand

for pretending concrete going inside

Sequance For PT Slab Concreting

1. Formwork that been called as the temporary molds for the permanent concrete

2. Reinforcing steel that has been added bottom and top reinforcement





[1327]

3. They were laying the strand as vertical and horizontal as per the design there has been some grouting pipe

that has been extended from the strand

4. Concrete that has been used as M45 grade for the slab

5. Then using vibrator spreading of the concrete without void

6. They using the anchor casting and split pocket former before the stressing

7. By using the stress jack they stress the tendon tail for the elongation length as per design before stressing

it has to minimum strength attain as 28N/ mm2

8. After 24 hrs they check the elongation length is correct or not

9. Then fill the gap by using the extended pipes mix ratio 20 litre water, 50kg of cement and 225 gm cebex

100

Figure 16: Concrete For Pt Slab Figure 17: Strand Laid Position

DEWATERING

In this dewatering there has been two types of dewatering method id been used one is bottom

level dewatering and another type is been using is top level dewatering in this both used for protection of water

that has been going inside of the concrete and the structure

Bottom Level Dewatering

In this bottom level dewatering there has been used of the water stopper pad as the 12mm

thickness on the PCC concrete as 75 mm thickness level has been layer on the concrete and then they lay 12 mm

thickness of water stopper pad and they put M45 concrete is been used for the concrete in figure 18 there has

been normal PCC layer has been there and role of 12 mm thickness water stopper and in figure 19 you can

see that there has been layer on the normal PC concrete

Figure 18: Normal PCC In Bottom Figure 19: 12mm Thick Water Stopper





[1328]

Top Level Dewatering

In this top level there has been using chemical polymer paint to stop the water penetrating inside the

concrete and the building they use polymer as painting on the top of the concrete as like paint and the next day

they fill up the area of 7 cm high on the concrete for 28 days is there any leakage in that they drill and grout the

hole inside with pressure and they repeat the process to check it. In figure 20 they were applying on the wall

and the ground and figure 21 they mixed polymer is been

Figure 20: Applying The Water Stopper Figure 21: Mix Of Water Stopper

CONCRETING PCC ON SAND

Leveling of the concrete is main purpose for the concrete they use PCC for the main concreting

erosion protection they used leveling machine for the sand and they put concrete for 75 mm thickness of

normal PCC concrete in figure 22 sand leveling machine

Figure 22: Ground Leveling Machine

REINFORCING OF RETAINING WALL In this retaining wall is been acted as the compound wall of the Chennai square building and

sand retaining wall they used M45 grade concrete for the retaining wall they were reinforcing the wall by given

diagram details in figure 23 reinforcing of the steel bars is been given and in figure 24 that wall is been ready

for the concreting

Figure 23 Reinforcement Bar Retaining Wall Figure 24: Ready For Concreting





[1329]

III. CONCLUSION

This report is a description of practical knowledge from the site of Chennai Central square and in the

Shenoy Nagar.Various methodologies were studied and they were proceeded in the site method as solvingl

problem faced at site

During this Training period, the following conclusions attained,

❖ In this training period I gain knowledge of the construction machinery used in the site.

❖ The training period in Shenoy Nagar how they distributed the workers and timed period.

❖ The various climatic conditions problem as the rainy and sunny time

❖ There have been safety processed by the safety department they been checking of noise, air polution, and

they been checking for by more than 5 safety engineers .

IV. REFERENCES [1] IS 2911 part 1 / Section 2 – code practice for design and construction for piles

[2] IS 2062 ( E350BR) – Structural steel

[3] IS 10262 – code of practice for concrete design

[4] IS 516 – method of test for strength of concrete

[5] IS 816 – code of practice for use of metal ARC welding for general construction in mild steel

[6] IS 822- Code procedure for inspection of welds

[7] IS 2502 – code of practice for bending and fixing of bars

[8] IS 456 2000 – code of practice for plain and reinforcement concrete

[9] IS 14268 : 1995 – pre stressed concrete specification

[10] IS 12269: 1987 – specification for high strength deformed steel and wire

[11] M S Shetty, “Concrete Technology”, S.Chand Publishing company ltd., New Delhi.

[12] M L Gambhir, (Fifth Edition) “Concrete Technology”, Tata McGraw-Hill Publishing company ltd., New

Delhi.

[13] “NATIONAL BUILDING CODE 2016” (Volume-I)

[14] Krishna Raju, “Design of Reinforced Concrete Structures”, CBS Publishers and Distributors, New Delhi.

[15] Dr.M.P.R.M.Ramasamy “VAASTHU SASTHIRAM”.,Chennai


study on construction of metro rail station

Documents