大跨度中承式提篮拱桥梁体吊装方案比选研究

Research on Comparison and Selection of Hoisting Schemes for Large-span Halfthrough X-style Arch Bridge

某大跨度中承式提篮拱桥采用先拱后梁的施工方法。文章对该桥建立全桥空间有限元模型,从主拱肋的变形和受力、预制块定位的难易程度等方面,对该桥梁体在两种不同施工吊装方案(由中至边对称逐块吊装与间隔对称吊装)下的变形和受力状态进行了综合比选分析,推荐了最优方案。

A large-span half-through x-style arch bridge adopts the construction method of the arch first and then the beam.This article established the full-bridge spatial finite element model for this bridge,then,from the aspects of the deformation and force of main arch rib,and the difficulty extend of positioning the precast block,it conducted the comprehensive compared and analyzed the deformation and stress state of this bridge beam under two different hoisting construction schemes(one by one symmetrical lifting from middle to side and interval symmetrical lifting),and recommended the optimal solution.