论文部分内容阅读
在城市中施工地铁车站空间有限,采用盖挖逆作法施工,可降低其对周边环境的影响,基坑开挖过程中频繁的加、卸载作用,使围护结构不断发生内力重新分布,引发明显变形。该文以深圳地铁7号线盖挖逆作法施工的地铁车站基坑为研究对象,采用数值模拟和施工监测相结合的手段,对地下连续墙在整个施工过程中变形的时空分布规律进行分析,结果表明:数值计算结果与现场实测结果基本一致,所采用的有限元计算方法能够较为真实地模拟盖挖逆作法施工的情况,各监测数据均未超过控制值。
The construction of metro stations in the city has limited space and the construction of the subway station can reduce its impact on the surrounding environment. Frequent loading and unloading during the excavation of the foundation pits will cause the continuous redistribution of internal forces in the envelope structure, Deformation. In this paper, the foundation pit of metro station constructed by reverse excavation of Shenzhen Subway Line 7 is taken as the research object. By means of the combination of numerical simulation and construction monitoring, the spatial and temporal distribution of the diaphragm wall deformation during the whole construction process is analyzed. The results show that the numerical results agree well with the field measurements. The finite element method can simulate the actual construction of the overburden construction method, and the monitoring data do not exceed the control value.