基于Midas GTS的深基坑开挖支护三维数值分析

3D Numerical Simulation Analysis of Deep Foundation Pit Support Based on Midas GTS

以海南省三亚市天涯区某酒店地下室深基坑为研究对象,根据场地工程地质和环境条件,利用有限元软件Midas GTS建立三维数值模型,进行基坑分步开挖的数值模拟分析。通过提取基坑的水平和竖向变形以及桩锚的内力值,得出基坑开挖过程中土体发生最大沉降的位置以及坑底隆起和桩锚受力情况。数值分析结果均满足相应规范的要求,表明基坑支护设计具有合理性,其相关数据可为基坑实际开挖提供信息反馈。

Taking the deep foundation pit of a hotel in Tianya District,Sanya,Hainan Province as the research object,based on the site engineering geology and environmental conditions,the three-dimensional numerical model is established by finite element software Midas GTS,and the numerical simulation analysis is carried out for the excavation of the foundation pit. By extracting the horizontal and vertical deformations of the foundation pit and the internal forces of the pile anchors,the location of the maximum settlement of the soil in the excavation process of the foundation pit and the uplift of the bottom of the foundation pit and the stress of the pile anchor are obtained. The results of numerical analysis meet the requirements of corresponding codes,which indicates that the design of foundation pit support is reasonable,and the relevant data can provide information feedback for actual excavation of foundation pit.