东江特大桥主桥二次张拉低回缩钢绞线竖向预应力设计与施工

Dongjiang Big Bridge Second Tensioning Shrinkage Steel Strand Vertical Prestress Design and Construction

东江特大桥是博深高速公路最大的一座特大桥,北接博罗苏村,南接惠州潼湖,跨越广东东江,全长2675.43m,其中东江特大桥属于博深高速公路第一合同,主桥采用连续刚构方案,并采用竖向预应力二次张拉设计与施工,本文介绍主桥竖向预应力设计与施工关键技术,希望对类似桥型的设计与施工起到借鉴与参考作用。

Dongjiang big bridge is the largest bridge of Boluo—Shenzhen highway.The north part of the highway is Luosu village;the south part is Tonghu of Huizhou,which crosses the Dongjiang.The overall length is 2675.43m.Dongjiang big bridge is No.1 contract segment of Boluo—Shenzhen highway.The bridge uses continuous rigid frame,and uses the design and construction of vertical prestressed second tensioning.The paper introduces the vertical prestress design and construction key technology,hoping to providing reference for design and construction of similar bridge.