Numerical study on lateral wall displacement of deep excavation supported by IPS earth retention system  

作　　者：Tugen Feng Long Liu Tao Tong Mi Zhou 

机构地区：[1]Key Laboratory of M inistry of Education for Geomechanics and Embankment Engineering,Jiangsu Research Center for Geotechnical Engineering Technology,Hohai University,1 Xikang Rd,Nanjing 210098,China [2]Survey and Design Research Institute of Jiangxi Province,169 Zhiyang Rd,Nanchang 330095,China [3]School of Civil and Transportation Engineering,State Key labor atory of Subtropical Building Science,South China University of Techmnology,381 Wushan Road,Guangzhou 510640,China

出　　处：《Underground Space》2017年第4期259-271,共13页地下空间（英文）

基　　金：undertaken with sup-port from National Nature Science Foundation of China(No.51009054);Jiangsu Province Nature Science Founda-tion of China(No.bk2010513);China funding Science and Technology Project of POWERCHINA Huadong Engi-neering Corporation Limited(SD2013-10);the Water Resource Science and Technology Innovation Program of Guangdong Province(2015-17);the Fundamental Research Funds for the Central Universities of China(D2171820);Major project research funding of the Science and Technology of the Ministry of Education of China(No.109077).

摘　　要：The objective of this study is to investigate the 3D behavior characteristics of an excavation supported by an innovative prestressed support(IPS)earth retention system.A numerical simulation was conducted in order to provide insight into the IPS system behavior by using the FLAC3D package.Prior to the parametric study,validation work was conducted by means of a comparison of the deformation between thefield test data and numerical analysis results,and strong agreement was obtained.The reasonable excavation location,lay-ered excavation thickness,and blocked excavation sequence are presented according to variable parameter analysis.In view of the pre-viousfindings,certain measurements are proposed in order to control the foundation pit deformation.The results indicate that prestress compensation has a significant effect on the IPS system behavior,while an optimized excavation sequence slightly improves its behavior.With the conclusion proposed based on the numerical results,the aim is to provide reference data for optimization design and the construction sequence.

关 键 词：FLAC3D IPS system Prestress compensation Layered excavation Blocked excavation Deformation control 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]