Design of High-Rise Pier and Long Span Continuous Girder Bridge of Jiangjinshan Bridge

The main bridge of the Jiangjinshan Bridge consists of a 32-m span prestressed concrete(PC) T-girder bridge and a PC continuous girder bridge with span arrangement(60.75+4×100+60.75) m.The main girder of the continuous girder bridge employs the variable cross section box girder having single cell single box and vertical webs and the girder is provided with three-way prestressing system and with reverse precamber in terms of sum of the deflection resulting from dead load and 1/2 live load.At each movable bearing,the horizontal pre-offsetting amount is set longitudinally along the bridge.The piers of the bridge are designed as the round-end piers,of which the pier No.1 is the solid pier while the piers No.2~6 are the hollow piers,all resting on group pile foundations.The software BSAS V3.76 is used to analyze the planar static force of the main girder and the software Bridge Doctor is used to analyze the transverse forces in the cross sections of the box girder and to calculate the spatial dynamic response of vehicle-bridge system of three types of the vehicles that will pass through the bridge.The results of the calculation demonstrate that the design of the bridge can satisfy the relevant requirements in the codes,the bridge has good dynamic performance,train traveling capacity and the safety and passenger comfort when trains travel through the bridge can meet the requirements as well.