金温铁路大溪大桥1-112 m提篮拱系梁安全检算

摘要

金温铁路大溪大桥主跨采用112 m提篮拱横跨大溪，支架现浇施工。施工过程中因连续暴雨，上游泄洪导致部分支架被洪水冲毁影响系梁结构安全。对部分支架损毁后的系梁受力状态进行有限元分析，通过对结构进行适当假定，模拟系梁产生变形后，系梁内部受力情况的变化。计算结果满足规范各项指标要求，并根据施工现状提出合理的施工建议。%The Daxi Bridge of Jinhua-Wenzhou Railway is located at Liandu district in Lishui City of Zhejiang Province.The Cast-in-place main span uses 112 meters-span X-Style Arch Bridge crossing the Daxi River.As the continuous rainstorm,the element of bridge falsework destroyed by the upper valley sluice impacts the bridge safety during the construction period.This paper based on the finite element analysis of the damaged bridge falsework,through the proper assumption of the structure the change of the force inside the collar beam is simulated in the case of collar beam deformation.The re-sults meet standard index requirements,and reasonable construction suggestions are put forward.