摘要
以软土地区深基坑工程为研究案例,利用PLAXIS3D有限元软件分析不同围护结构形式下,基坑开挖对围护结构位移以及隧道变形的影响。结果表明采用钻孔灌注桩与地下连续墙结合方案相较于采用钻孔灌注桩围护结构方案侧向水平位移减小0.64mm,隧道位移减小0.02mm;与刚度最大的地下连续墙相比,围护结构侧向位移增加10.9mm,隧道位移增加0.055mm;三种方案的围护结构最大位移均发生在坑底。研究结果为软土地区工程围护结构选型提供了参考。
This paper takes deep foundation pit project in soft soil area as a research case and uses PLAXIS3D finite element software to analyze the effect of foundation excavation on displacement of enclosure structure and tunnel deformation under different forms of enclosure structure.The results show that the lateral horizontal displacement of the combination scheme of bored pile and diaphragm wall is reduced by 1.22mm and the tunnel displacement is reduced by 0.02mm compared with the enclosure scheme of bored pile;compared with the diaphragm wall with the largest stiffness,the lateral displacement of the retaining structure increases by 1.29mm and the tunnel displacement increases by 0.055mm;the maximum displacement of the retaining structure of the three schemes occurs at the bottom of the pit.The research results provide a reference for the selection of engineering enclosure structures in soft soil areas.
作者
杨东雷
黄汉祥
张海亮
曹生辉
朱忠宁
姚伟康
叶科
YANG Donglei;HUANG Hanxiang;ZHANG Hailiang;CAO Shenghui;ZHU Zhongning;YAO Weikang;YE Ke(China Railway First Group Co.,Ltd.,Xi’an 710054,China;Hangzhou Metro Group Co.,Ltd.,Hangzhou 310020,China;Zhejiang University of Technology,Hangzhou 310034,China)
出处
《建筑结构》
CSCD
北大核心
2022年第S01期2608-2613,共6页
Building Structure
关键词
深基坑
围护结构
隧道变形
有限元模拟
deep foundation pit
exterior-protected construction
tunnel deformation
finite element simulation
