地铁隧道两侧深基坑维护结构有限元分析

Finite Element Analysis of Maintenance Structure of Deep Foundation Pit on Both Sides of Subway Tunnel

【目的】分析地铁沿线深基坑维护结构在不同施工工况下的受力及变形特征,为工程施工提供指导。【方法】结合工程实例,对地下连续墙进行力学特性分析,应用有限元软件对地下连续墙围护结构内力与变形计算分析,分析不同工况下的受力与变形状态。【结果】通过有限元模拟计算,对地下连续墙维护进行力学特性和变形分析,找出逆作法施工中基坑维护结构的危险状态。【结论】结合实际施工情况,验证了模拟计算的有效性,对地铁线路、临近建筑物、地下管线等起到了良好的保护作用,保证施工安全。

[Purposes]The stress and deformation characteristics of the deep foundation pit maintenance str-ucture along the subway in different construction conditions are analyzed to provide guidance for engineering construction.[Methods]Combined with engineering examples,the mechanical characteristics of the diaphragm wall are analyzed,the internal force and deformation of the diaphragm wall envelope are calculated and analyzed by using finite element software,and the stress and deformation state under different working conditions are analyzed.[Findings]Through finite element simulation calculation,the mechanical characteristics and deformation of underground diaphragm wall are analyzed,and the dangerous state of foundation pit maintenance structure in reverse construction is found out.[Conclusions]Combined with the actual construction situation,the validity of the simulation calculation is verified,which plays a good role in protecting the subway lines,adjacent buildings,underground pipelines,etc.,and ensures the construction safety.