黄土地区地铁深基坑围护结构变形特性的FLAC软件模拟分析

FLAC Numerical Simulation of Deep Foundation Pit Retaining Structure Deformation Characteristicsin Loess Area

以西安地铁2号线韦曲南站深基坑工程为对象,通过FLAC软件模拟计算及现场监测得出黄土地区该地铁车站深基坑围护桩桩体位移变化特征、钢支撑轴力变化特征,分析监测数据得出黄土湿陷性对该基坑围护结构的影响程度。所得结果可为西安黄土地区车站深基坑围护结构优化及监测方案的制定提供参考。

Based on the deep foundation pit engineering of South Weiqu Station on Xi＇ an metro Line 2, and through FLAC numerical simulation software and on-site monito- ring, the pile displacement variation and the steel support axial force variation of the deep foundation pit in the col- lapsible loess area are obtained. By analyzing the monitored data,the deformation law of retaining structure influenced by collapsible loess is founded. This research will provide a reference for the optimization of deep foundation pit sup- port structure and formulation of monitoring program in the collapsible loess around Xi＇an railway stations.