高速公路装配式空心板桥桥面铺装破坏加固新方法

A New Remedy Method for Deck Damage of Expressway Prefabricated Cellular Slab Bridge

采用施加横向预应力体系的方法,将原空心板间横向铰接构造变为刚接,增加了空心板间的横向联结能力,部分提高了装配式板桥的承载能力.工程实例桥的成功应用,证明了该加固方法的可行性与可靠性.

The prefabricated cellular slab bridge deck and rabbet joint damage,slot-filling concrete falling off are universal early bridge damage in expressway.Some serious of these kinds damage render the transverse coupling capability of prefabricated cellular slab lost nearby wheel trace,even conduce cellular slab completely independently bearing the wheel load.These damages endanger the bridge structure safety.In this paper,the new remedy method is put forward.In which,the transverse pre-stress system is adopted to enhance the transverse coupling capability of prefabricated cellular slab,because this measure change the cellular slab transverse joint from gemel to rigid,and this will partially improve the carrying capacity finally.The instance engineering successful application validate that this remedy method is feasible and reliable.