基于FLAC的复合土钉墙支护深基坑数值模拟

基于FLAC-3D建立了某深基坑复合土钉墙支护形式的数值模型，对开挖过程进行了三维动态模拟，并与现场监测数据作了对比分析，力求为深基坑复合土钉墙支护的设计和施工提出合理的建议。分析表明，土体地表位移随着开挖深度的变化而变化，土体最大沉降量发生在距基坑坡顶开挖边线一定距离的地表；沿深度方向，土体水平位移向坑内偏移，且水平位移最大值位于基坑坑壁中部偏下位置。

Research on deep foundation pit supported by composite soil-nailing wall based on FLAC

With the help of numerical model of a deep foundation pit supported by soil-nailing wall,a three-dimensional dynamic simulation on excavation is conducted based on FLAC-3D.Meanwhile,the comparison and analysis of numerical results and in-situ monitoring data are made,the results can be used for the design and construction of this key earth retaining structure.According to the analysis,as the depth of the excavation increases,the surface displacement of soil also varies.The largest settlement appears at the ground surface where some distance away from the slope line.The horizontal displacement reaches its maximum value in the middle and some downward place of the pit slope,with an inward offset tendency to the foundation pit.