Design and Construction of ROB on DCM Railway Crossing at Kota, Rajasthan.
Client :
Urban Improvement Trust, Kota
Cost of Work :
Rs.251.59 Million.
Year of Completion :
May 2009
Description of Work :
The ROB total length 590 m incl. Approaches
Foundation :19 nos. of RCC Footing having depth 1.5 m (600 mm in hard rock)
Substructure : RCC Circular Pier (1800 mm dia)
Superstructure :Width of the bridge 17.2 m (without Footpath)
Span Arrangement :2 x 24 m (PSC I Beam) + 1 x 24 m (PSC Solid Slab) + 1 x 36 m (PSC Box Girder) + 13 x 18 m ( RCC Solid Slab) + 1 x 16 m ( RCC Solid Slab)
Approaches :RE Structure and Retaining Wall
Ramp :Width 11.2 m and 300 m length
Retaining Wall Footing Rock Excavation
Rock Excavation Footing
View of Substructure
Staging arrangement for casting superstructure.
RE Panel Casting Yard
Casting of superstructure
View of a partially completed bridge
Casting of ROB Portion superstructure over electrified track in a running train condition
ROB Portion of Superstructure
View of Jaipur Arm of the bridge
View of DCM end of the bridge
View of DCM end of the bridge
Remarks
:
This ROB is constructed across one of the busiest level crossing on trunk route between Mumbai and Delhi. The portion of the bridge within Railway limit was constructed over Electrified Railway Track.
The girders were cast at a height of about 2 metres above a bed block over a temporary staging. The temporary staging was erected during traffic and electric blocks of Railway. After casting / first stage prestressing, girders were lowered in position by hydraulic jacks, observing utmost safety for the running train. This challenging job involving 16 girders and 4 deck slabs were completed in a period of about 60 days.
The approaches were constructed with Reinforced Earth wall / Retaining Wall.
