摘要
围绕泥水盾构开挖面上极限支护应力与开挖面破坏形式的关系,采用数值软件模拟不同支护作用下开挖面的破坏状态。结果表明:开挖面破坏可分为稳定、屈服、破坏3个阶段,利用应力位移曲线可得到开挖面的极限支护应力;开挖面土体发生主动破坏时,滑裂面从开挖面底部延伸至地表,而发生被动破坏时滑裂面则从开挖面中部发展至地表;不同支护作用下开挖面的极限支护应力可作为泥水盾构气压及泥浆压力大小设置的参考。
This paper focuses on relationship between ultimate support stress and failure mode of excavation face of slurry shield,numerical software is used to simulate failure state of excavation face under different support.The results show that:the failure of excavation face can be divided into three stages:stability,yield and failure.The ultimate support stress of excavation face can be obtained by using stress displacement curve.When soil mass is damaged actively,the sliding face extends from bottom of excavation face to surface,when passive failure occurs,the sliding face develops from middle of excavation face to surface.The ultimate support stress of excavation face under different support actions can be used as a reference for setting pressure and slurry pressure of slurry shield.
作者
徐静波
刘杰
俞超杰
XU Jing-bo;LIU Jie;YU Chao-jie(Survey and Design Institute of China Railway Tunnelling Bureau Group Co.Ltd,Guangzhou 510000,China;CCCC Second Harbour Engineering Company Ltd.,Wuhan 430040,China;College of Civil and Transportation Engineering,Hohai University,Nanjing 210098,China)
出处
《工程建设与设计》
2020年第4期106-108,共3页
Construction & Design for Engineering
关键词
泥水盾构
极限支护应力
开挖面
slurry shield
ultimate support stress
excavation face
