INDUSTRIAL TRAINING

REPORT

COMPANY NAME : DELHI METRO RAIL CORPORATION LIMITED.

DURATION : 18, May 2016 to 21, June 2016

NAME : DEEPAK KUMAR

ROLL NUMBER : 1301011044

DEPARTMENT OF CIVIL ENGINEERING

DIT UNIVERSITY

Project Name-Design and construction of tunnel &

underground metro stations from Janakpuri West to

Botanical Garden(CC-32) and (CC-34)

Client DMRC

Location Delhi

Contract Type Design and construction basis.

Contractor HCC-Samsung JV (Share 50 : 50) and HCC is leader

Completion period 46 months (18 Feb. 2013 ~ 01 Dec. 2016)

Contract Value 865.98 Cr. (A = 812.04, B = 41.18, C = 12.76)

Scope of work Design and construction of

Twin tunnel between ch. 830.912 and 4591.63 by shield TBM. (4.363

KM Each)

0.113 km and 0.158KM long Crossovers on either side of Janakpuri

station by C/C Method.

U/G Stations at Janakpuri West, Dabri Mor and Dashrathpuri

including architectural finishing of stations.

Interchange facilities between old and new Metro station

at Janakpuri.

SITE LOCATION

SITE MAP1. Site map of CC32

2. SITE MAP OF CC33

SAFETY INDUCTIONIn safety induction safety engineer told us about the use of safety equipment and PPE (Personal

Protective Equipment) at construction site.

PPE(Personal Protective Equipment)

Safety Helmet

Safety shoes

Safety Gloves

Safety Jacket

Safety Glasses

Bottom Up construction Method(JANAKPURI

STATION)Bottom up construction involves

Excavation & Soil Stabilization

Construction of Base slab, Concourse slab & Roof slab

Construction of Columns and Retaining wall.

Waterproofing of structure

Filling Operations

TUNNEL OVERVIEW

KEY POINTS ABOUT TUNNEL:-

Tunnels are constructed with the help of TBM (tunnel Boring Machine)

The type of tunnel is “twin tunnel”.

Inner diameter of tunnel is 5.8m

Outer diameter is 6.5m

There are 6 segment key in one ring of thickness 275mm and length 1.4m

A cross passage is provided after every 200 rings for emergency exit.

The lowermost of the tunnel is 20m below the ground surface.

TBM (Tunnel Boring Machine)A tunnel Boring machine also known as “mole“, is a machine used to excavate tunnels with a circular cross section through

a variety of soil and rock strata. They can bore through anything from hard rock to sand. Tunnel diameter can range from a

meter (done with micro-TBM) to 19.25 meter to date.

Tunnel boring machine are used as an alternative to drilling and blasting methods in rock and conventional “hand mining “in

soil. TBM have the advantages of limiting the disturbance to the surrounding ground and produced a smooth tunnel wall.

The major disadvantage is the upfront cost. TBMs are expensive to construct, and can be difficult to transport. However, as

modern tunnels become longer, the cost of tunnel boring machines versus drill and blast is actually less.

WATER PROOFING

Chemicals used for Waterproofing

-For Priming Purpose

Master Seal M2525(Provided In two component A & B)

-Waterproofing Layer

Master Seal M800(Provided In two component A & B)

Master Seal M2525-Master Emaco 2525 is a solvent free, high-performance, versatile epoxy binder that can be used to produce a range of epoxy resin based mortars.

Several application stages:

Surface preparation

Pre-Application condition

Preparation for Primer coat

Spraying of MasterSeal M 800 membrane

Surface Test

BACKFILLING

The backfill material used shall be suitable earth / fine sand

complying with the required specification.

Compaction of soil layer is done using rammer, plate compactor

and manual compaction will be done. Special care is taken

during the the compaction such that utilities are not damaged

during the compaction.

Dumping, spreading and compaction of soil are done in layer of

@ 200 mm compacted thicknesses until the desired compaction

level is achieved.

The soil is compacted till 95% compaction is achieved for each

layer and testing requirement shall be as per criteria specified.

BLOCK

WORKSDimension of Block– 400*200*200

Mortar-Cement sand mortar with ratio 1:4

Block Strength- 7.5 N/mm2

MIX –M15

Thickness of the bond-10mm

Joint Type-Basic English Bond(1 block thick)

BLOCK WORK IN

FRONT OF

RETAINING WALL

CONCOURSE

SLAB

ROOF SLAB

INITIAL LAYER OF BLOCK

WORK

RETAINING WALL

METHOD FOR CONCRETING

Placing of concrete

Compaction of concrete

Curing of concrete

Various methods involves in concrete work

REBARING

Mostly HILTI chemical are used for rebaring

Steps involved:-

Drilling in the existing structure as per drawing

Cleaning of holes by ELE blower

Filling of chemical in well cleaned holes

Then inserting bars slowly inside the holes

Rebaring is the method of insertion of steel bars when:-•There is change in design or there is some extension of present structure.

•When steel rod as per has been not installed and to install the same rebaring is used.

QUALITY ASSURANCE & QUALITY CONTROL

TESTS ON CEMENT

TESTS ON AGGREGATES

WATER ABSORPTION

TESTS ON CONCRETE

CONCLUSION

It was a wonderful learning experience at Delhi Metro Rail Corporation Ltd.

for 5 weeks at CC32(UG-3) and CC34(UG-5). I gained a lot of insight

regarding several aspect of site. I was given exposure in almost all the

departments at the site. The friendly welcome from all the employees is

appreciating, sharing their experience and

giving their peace of wisdom which they have gained in long journey of work.

I am very much thankful for the wonderful accommodation facility from

DMRC. I hope this experience will surely help me in my future and also in

shaping my career.

THANKYOU