This paper gives the details of the load testing of the bridges through a case study of second Thane Creek in Mumbai.
Description of Bridge
The second Thane Creek bridge, Mumbai has two independent carriageways (namely north and south) and was constructed in the year 1994. General view of the bridge is shown in Fig.1. The length of north carriageway of the bridge is 1837.09 m. It has 23 spans which comprises of six units and each unit consists of four continuous spans as shown in Fig.2 and Fig.3. The carriageway width is 11 m with 600 mm wide footpath on upstream (U/S) side and 890 mm central median on downstream (D/S) side. The superstructure consisting of single cell prestressed concrete box girder cross-section (refer Fig.4) of 6.5m width and varying depth 7.0m at support, reducing to 3.5m at mid-span was constructed by the free cast in-situ cantilever construction method. The superstructure of each unit is supported over POT-PTFE bearings (four POT-PTFE bearings) on the fixed pier (central) and a combination of POT-PTFE sliding and guide bearings on the remaining four piers. Finger type expansion joints have been provided in superstructure of the bridge.