FLAC3D在深基坑工程开挖中的数值模拟分析  

Application of FLAC3D in Numerical Simulation Analysis for Deep Foundation Pit Excavation

作　　者：冯勇[1] 李平[2] 姜春艳[1] 

机构地区：[1]新疆农业大学水利与土木工程学院,新疆乌鲁木齐830052 [2]河海大学岩土工程科学研究所,江苏南京210098

出　　处：《水利与建筑工程学报》2013年第4期17-20,27,共5页Journal of Water Resources and Architectural Engineering

基　　金：新疆维吾尔自治区高校科研计划基金"细粒土在冻融循环下物理力学性质的研究及其应用"(XJEDU2009S41);新疆水利水电重点学科基金(XJSLSDZDXK2012-13)

摘　　要：使用FLAC3D三维快速拉格朗日差分程序,对中天广场深基坑支护工程的开挖与支护进行了数值模拟研究,模拟结果显示基坑内土体沉降随着基坑开挖深度的增加而加大,基坑底部隆起位移也是随着基坑开挖深度的增加而加大,基底中部的隆起量最大,靠近基坑壁处较小;基坑土体水平位移同样是随着基坑开挖深度的增加而加大,基坑壁向坑内的水平位移变化趋势仍然是中间部分最大,边角处最小,而且基坑壁的长边由于开挖的范围相对较大,其变形量相对于短边也增大,这充分体现了基坑开挖过程中的时空效应,数值模拟计算结果可以为工程设计提供指导和参考。The three-dimensional fast Lagrangian FLAC3D procedure is used here to simulate the deep foundation pit excavation and support of Zhongtian plaza.The simulation results show that the soil settlement is increased with the excavation depth,and the uplift displacement at the foundation bottom is also increased with the excavation depth.In the central basement,the uplift grows to the largest value,and near the foundation pit wall,it is smaller.At the same time,the horizontal displacement of soil excavation is increased with the excavation depth.The change trend of the horizontal displacement from the foundation pit wall to the inner is still largest in the center and smallest in the corner,and because the long side of the foundation pit wall is dug relatively in a large scope,its deformation is increased compared with the short side,which fully reflects the space-time effects in the process of the excavation.The calculation results can provide guidance and reference for the design of engineerings.

关 键 词：FLAC3D 深基坑 位移 数值模拟 

分 类 号：TU470.3[建筑科学—结构工程]