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京沈客运专线在北京市密云境内跨越潮白河,根据桥址处自然环境,设计采用60 m+4×106 m+60 m预应力混凝土连续梁型式跨越潮白河,梁部采用单箱单室直腹板变截面箱形梁,设置三向预应力体系。简要介绍60 m+4×106 m+60 m预应力混凝土连续梁的结构设计和施工方法,通过结构计算分析表明该桥设计合理,各项设计指标均满足规范要求,可为此类客运专线长联大跨连续梁设计提供参考。
The Beijing-Shenyang Passenger Dedicated Line crosses the Chaobai River in Miyun, Beijing. According to the natural environment at the bridge site, a 60 m + 4 × 106 m + 60 m prestressed concrete continuous beam is designed to span the Chaobai River. Web box with variable cross-section beam, set three-way prestressed system. The structure design and construction method of 60 m + 4 × 106 m + 60 m prestressed concrete continuous beam are briefly introduced. The structural calculation and analysis show that the bridge is reasonable in design and all the design indexes meet the requirements of the specification. United Nations to provide reference for continuous beam design.