深圳地铁在建明挖隧道区间基坑工程施工过程数值模拟

在深圳地铁基坑工程的基础上,用ABAQUS数值计算分析方法,对地铁区间复杂的基坑周边环境进行分析,研究淤泥质黏土地层对基坑建设的影响。研究表明:基坑开挖后基坑底部会有比较明显的隆起现象,基坑塑性破坏区域主要集中于基坑底部与桩基相接触的位置,随着基坑的开挖施工,其周边岩土体介质均不存在较明显失稳破坏区域,对周边建筑物的正常运营影响较小。

Numerical Simulation of Deep Open Cut Foundation Pit Construction in Large Subway Station of Shenzhen Subway

In this paper ,the influence of silty clay stratum on the construction of foundation pit is studied by analyzing the complicated environment surrounding the foundation pit of the tunnel under the foundation of the foundation pit of the Shenzhen Metro .The results show that there are obvious uplift phenomena at the bottom of the foundation pit after exca -vation ,and the plastic damage area of the foundation pit is mainly concentrated in the position of the bottom of the foun -dation pit and the pile foundation .With the excavation of the foundation pit ,soil medium does not exist obvious damage to the destruction of the area ,and there is little impacts to the surrounding building as well .