地铁盾构施工对上部既有桥梁的影响分析

Analysis on Influence of Metro Shield Construction on Upper Existing Bridge

摘要:

以成都地铁1号线盾构施工下穿既有锦江大桥为研究对象，采用大型三维有限元软件ANSYS，分别对桥梁基础加固前后，地铁盾构施工对既有桥梁所产生的位移及应力进行数值模拟计算，对加固前后的结果进行比较分析，总结出有意义的结论，有关经验可供相关专业人员参考。

Abstract:

Taking the shield tunneling of Chengdu Metro Line 1 under the existing Jinjiang Bridge as the research object, the displacement and stress of the existing bridge caused by the metro shield construction are numerically simulated and calculated before and after the reinforcement of bridge foundation by using the large-scale three-dimensional finite element software ANSYS. The results before and after the foundation reinforcement are compared and analyzed. The significative conclusion is summarized. The relative experience can be referred for the similar projects.