摘要
采用MIDAS/GTS软件建立三维有限元模型,针对基坑群施工对既有地铁隧道影响进行数值分析。通过对比隧道内同步实测结果与当前开挖步的计算结果,验证模型的有效性,再进一步仿真模拟后续施工步,分析群坑开挖对隧道的耦合效应,并提出了优化设计、施工方案的有效措施,对保证基坑群施工时既有地铁运营安全具有一定的指导意义。
This paper presents the results of three dimensional finite element analysis model using MIDAS-GTS commercial software. The effect of multiple deep excavations on the existing metro tunnel is numerically simulated. During the foundation excavation, the numerical results are verified simultaneously with the instrumented values that made in the tunnel. The subsequent foundation excavation on the metro tunnels can therefore be predicted and the design and construction can be optimized. This approach provides a safe guard for the foundation excavation construction and the operation of the subways.
出处
《土工基础》
2014年第4期73-77,共5页
Soil Engineering and Foundation
基金
广东省交通运输厅科研项目(2012-02-059)
关键词
三维有限元
基坑群
既有地铁隧道
耦合
Three-dimensional Finite Element Analysis
Multiple Deep Excavations
Existing Metro Tunnels
Deep Excava-tion-Tunnel Coupling
