地铁换乘站基坑变形流固耦合数值分析研究

Numerical Analysis of Excavating Deformation of Metro Transfer Station with Fluid and Solid Coupling Effect

摘要:

地铁换乘站基坑在施工过程中要严格控制其变形及对周边环境产生的影响。尽管流固耦合与非流固耦合分析结果有一定差异，但现有地铁换乘站基坑开挖变形计算中较少考虑流固耦合作用。本文针对济南长途汽车站地铁换乘站进行基坑变形分析，建立了考虑流固耦合的三维有限元模型，根据模拟结果，确定出地连墙最大侧向位移及地面沉降最大值发生的位置，并对地铁换乘站基坑变形规律进行了总结和分析。本文研究成果可以为类似地下工程基坑分析计算和施工设计提供有益参考与借鉴。

Abstract:

The effect of the excavating deformation on the surrounding environment should be extremely limited in the excavation of metro transfer station. Although there are some differences between the analysis results with and without fluid and solid coupling effect, few studies focus on the excavating deformation of the transfer station with considering the fluid and solid coupling effect. In this paper, a threedimensional finite element model with the fluid and solid coupling effect has been established aimed to perform analysis of simulation results based on the background of the metro transfer station at Ji'nan Long Distance Bus Station. The locations of maximum lateral displacement of diaphragm wall and the maximum ground settlement are determined according to the simulation results. Furthermore, the deformation law of the foundation pit of the metro transfer station has been summarized and analyzed. It will provide useful references for the analysis and calculation in similar underground engineering excavation and construction design.