brts durgapura

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4/30/2012 1



About BRTS & JDA

BRTS

“BRTS” service provides rapid

transportation to the people.

JDA

JDA is the principal agency which is

responsible for the sustainable

development of JAIPUR.

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About “DURGAPURA ELEVATED BRIDGE PROJECT”

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The Durgapura Chauraha is one of the busiest intersection due to traffic

congestion by high volume of traffic, for reducing the possibilities of

accidents and for smooth movement of traffic development of grade

separated intersection was found necessary.

Detail of Project

Name of the work = Durgapura elevated bridge

Department = Jaipur Development Authority

Agency = ARSS Infrastructure Pvt. Limited.

Cost of Project =190,000,00000 cr.

Date of Started = 13.10.2008

Duration = 18 Month



Detail of bridge

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Total Length of bridge = 1.10 K.m.

Approach Slope = 1:40

Divider Width = 2.80 meter..

Segments width =15m

Anchor pile:-

Width of footpath on both side = 0.6 meter

Metro & Brts pier:-

No. of piers of Brts = 28nos.

No. of piles of metro =37nos.

Span of Brts pier = 30mc/c

Span b/w metro pier and brts pier=15m c/c



Material for construction

There are many of the materials but the main materials are given below:-

Cement

Aggregate

Sand

Bentonite

Reinforcement

Concrete etc……

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Component of a bridge

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Pile

Pile cap

PierPier cap

segment

Pedestal

Bearing

Panels

Re-WallGirder

Pre cast slab



Pile

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Pile may be defined as a column support type of foundation which may be cast in situ.

The load of the structure is transmitted by the piles to the hard stratum below or it resist by

the friction developed on the side of pile.



Pile cap

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The loads are usually transferred to the pile group through a reinforced concrete slab,

structurally tied to the pile tops such that the piles act as one unit. The slab is known as apile cap.



Pier

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Pier is the part of the sub structure. It upper part of the pile& below part of the pier caps

the load. The load on the pier by through the pier cap & superstructure. Pier transfer theload on the pile cap & pile.



Pedestals

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Pedestals are provided on the top of pier cap, to give a base to girders to rest. In the reinforcement

of pedestals TMT bars of dia 12mm is used. Recess of 6mm in the pedestal is provided for

neoprene bearing. The size of pedestal is 700mm x 550mm.

Bearings

Synthetic rubber like polychloroprene have found wide acceptance for making bearing for

concrete structure, it is accepted that in countries where natural rubber is abundantly available,the bearing made out of suitable compounded NR will be more economical, even through NR is

relatively poor against and may call for earlier replacement.



Reinforced Earth wall

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Retained Earth walls are in use for highway projects, bridge abutments, material storage

facilities and grade separation structures. The flexibility of the system, which allows for some

movement and settlement without cracking the facing panel, makes the system well suited to

seismic zones and areas with poor foundation conditions.



Para web

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High strength polyester based strip used to replace steel as the reinforcement element within

reinforced earth wall structures.

Para web consists of discrete bundles of closely packed high

strength synthetic fibres, lying parallel to each other, encased in a tough and durable polymeric

sheath. Girder

A girder in general, is a bridge built of girder placed on bridge abutments and foundation piers.

In turn, a bridge deck is built on top of the girders in order to carry traffic.



Fig:- Preparation of cover block4/30/2012 14



Detail of pile cage

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There are three types of pile cage:-

Bottom pile

Middle pile

Top pile

Bottom pile

length = 10m

8 bars of 20mm

12 bars of 16mm

59 bars of 8mmClear cover = 75mm

Maximum spacing = 175mm

Ring spacing = 150mm

Master ring spacing = 2.17m

Master ring = 16mm dia

8mm bar spacing = 150mm



Fig:- Pile cage4/30/2012 16



Middle pile

Length = 10.5m

8 bars of 20mm

12 bars of 16mm

59 bars of 8mm

Clear cover = 75mm

Maximum spacing = 175mmRing spacing = 150mm

Master ring spacing = 2.17m



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Top pile

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Length = 11.5m

20 bars of 20mm

59 bars of 8mm

Clear cover = 75mm

Maximum spacing = 175mm

Ring spacing = 150mmMaster ring spacing = 2.17m





Fig:- Pile cage4/30/2012 19



Gantry girder

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Gantry girders are laterally unsupported beams to carry heavy loads from place to place at the

construction sites, mostly these are of steel material.



Tests conducts for quality control

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Moisture content of sand (sand)

Sieve analysis (aggregate)

Compressive strength of concrete

Aggregate impact test

Test of workability (slump)

Pile load test



THANK YOU

Quarries

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