基于Midas的双层内支撑深基坑有限元分析  

Finite Element Analysis of a Deep Foundation Pit with Double-layer Internal Support Based on Midas

作　　者：董桂红[1,2,3] 钱雪鑫 DONG Guihong;QIAN Xuexin(Yunnan Institute of Building Research,Kunming 650223,China;Kunming Key Laboratory of Building Structure Safety and New Technology,Kunming 650223,China;Yunnan Key Laboratory of Building Structure and New Materials,Kunming 650223,China)

机构地区：[1]云南省建筑科学研究院,云南昆明650223 [2]昆明市建筑工程结构安全和新技术重点实验室,云南昆明650223 [3]云南省建筑结构与新材料企业重点实验室,云南昆明650223

出　　处：《人民珠江》2020年第2期117-123,共7页Pearl River

基　　金：云南省科技计划青年项目(2016FD132)

摘　　要：以昆明市某内支撑深基坑为研究对象,根据基坑周围环境、工程地质条件及水文地质条件,利用有限元软件Midas GTS NX建立基坑开挖三维数值模型,对基坑开挖过程中的变形以及支撑内力进行分析,并且与现场监测数据进行对比。结果表明:土体位移和支护桩位移的数值模拟结果与监测数据基本趋于一致,内支撑内力监测数据最大值未超过模拟计算结果,有限元模拟分析具有一定可靠性,可为基坑监测提供参考依据。Taking a deep foundation pit with internal support in Kunming as the research object,and according to the environment,geological engineering conditions and hydrogeological conditions around the foundation pit,this paper establishes a three-dimensional numerical model for excavation of the foundation pit by the finite element software of Midas GTS NX to analyze the deformation and support force of the foundation pit during excavation,and compares the simulation results with the data monitored on site.The results show that the numerical simulation results of soil displacement and support pile displacement are consistent with the monitoring data.And the maximum monitoring data of support force does not exceed the simulation results.Therefore,with good reliability,the finite element simulation and analysis can provide reference for foundation pit monitoring.

关 键 词：深基坑 有限元分析 支撑内力 土体位移 监测分析 

分 类 号：TU473[建筑科学—结构工程]