基于有限差分法的高边坡偏压基坑支护受力特征研究

Study on the Mechanical Characteristics of Foundation Pit Support for High Slope Eccentric Pressure Based on Finite Difference Method

为了研究有反压回填土和无反压回填土下基坑支护的应力及位移变化规律,论文以深圳地铁10号线凉帽山车辆基地工程为实例,通过有限差分软件FLAC 3D对比分析了高边坡偏压基坑不同开挖层次工况下支护的应力及位移变化,有反压回填土和无反压回填土对支护受力、位移及边缘塑性区变化的影响,为以后基坑工程的施工提供参考。

In order to study the law of stress and displacement variation of foundation pit support with and without backpressure backfill,this paper takes the project of Liangmaoshan vehicle base of Shenzhen metro line 10 as an example. Based on FLAC3 D software, the stress and displacement changes of support under different excavation levels of high slope eccentric pressure foundation pit are analyzed. And the influence of backfill on the force, displacement and edge plastic zone changes of support are analyzed, to provide reference for the construction of foundation pit project.