软土地区盾构隧道施工稳定性研究  

Numerical Simulation of Shield Tunneling in Soft Soil Stratum

作　　者：李平[1] 鹿庆蕊[1] 李栋伟 高金贺[1] 张敏思[1] LI Ping;LU Qingrui;LI Dongwei;GAO Jinhe;ZHANG Minsi(East China University of Technology,Nanchang,Jiangxi 330013,China)

机构地区：[1]东华理工大学,江西南昌330013

出　　处：《公路工程》2022年第4期70-77,110,共9页Highway Engineering

基　　金：国家自然科学基金项目(42061011,41977236,41672278);江西省自然科学基金项目(20192ACBL20002,20192BAB206044,20202BABL204055);新疆兵团科技计划项目(2020AB003);东华理工大学博士科研启动基金项目(DHBK2019229)。

摘　　要：以地铁绍兴一号线工程为例,采用大型通用有限元分析软件ABAQUS对EPB盾构在含有地下水的软土中开挖进行了非线性三维流体渗透/应力耦合分析。基于有限元模型,研究开挖面支护力对土体扰动影响,得到了不同支护比下盾构掘进过程洞周土体位移、孔压变化、地表沉降规律。利用ABAQUS软件进行参数化研究,评价了不同支护比下盾构侧穿秋瑾纪念碑的影响。研究结果可为类似软土区地铁工程施工提供一定参考建议。In this paper,Taking Shaoxing Metro Line 1 as an example,the nonlinear 3D coupled pore fluid diffusion/stress analysis of EPB shield tunneling in soft soil containing groundwater is carried out by using ABAQUS,a large-scale general finite element analysis software.Through the finite element model,the influence of excavation face support force on soil disturbance is studied,and the laws of soil displacement,pore pressure change and surface settlement around the tunnel under different support ratios are obtained.ABAQUS software is used to carry out parametric study,and the influence of shield passing through Qiujin monument at different support ratios is evaluated.The research results can provide some reference and suggestions for similar subway construction in soft soil area.

关 键 词：软土 支护比 孔压 沉降 

分 类 号：U455[建筑科学—桥梁与隧道工程]