摘要
为研究浅埋隧道围岩压力的计算方法,依托高丽营隧道工程,采用有限元软件建模分析,并基于剪切应变判定准则得到浅埋隧道的失稳破坏形态。然后构建塑性极限分析上限法破坏模式和速度场,建立浅埋隧道围岩压力计算方法,对岩土体非线性破坏准则对浅埋隧道围岩压力的影响规律进行探讨。研究结果表明:1)无论是基于线性还是非线性破坏准则,侧压力系数的取值对计算结果均有很大影响,侧压力系数的增大,会引起竖向围岩压力的减小和水平围岩压力的增加;2)围岩压力随非线性系数的增加而逐渐减小。
In order to study the calculation method of surrounding rock pressure of shallow tunnel, the failure mode of Gaoliying shallow tunnel is studied by using finite element software modeling and shear strain criterion.Furthermore, the failure mode and velocity field of the upper limit method of plastic limit analysis are constructed, the calculation method of surrounding rock pressure of shallow tunnel is established, and the influence law of rock and soil mass nonlinear failure criterion on surrounding rock pressure of shallow tunnel is discussed.The results show that:(1) The value of lateral pressure coefficient has a great influence on the calculation results based on the linear or nonlinear failure criteria;and the vertical surrounding rock pressure decreases and horizontal surrounding rock pressure increases with the increase of lateral pressure coefficient.(2) The surrounding rock pressure decreases with the increase of nonlinear coefficient.
作者
何玉珠
刘济遥
张智勇
曹豪荣
雷明锋
HE Yuzhu;LIU Jiyao;ZHANG Zhiyong;CAO Haorong;LEI Mingfeng(CCCC Third Harbor Engineering Co.,Ltd.,Shanghai 200032,China;School of Civil Engineering,Central South University,Changsha 410075,Hunan,China)
出处
《隧道建设（中英文）》
北大核心
2020年第S01期209-215,共7页
Tunnel Construction
基金
中交第三航务工程局有限公司科技开发项目(RD08)
关键词
浅埋隧道
围岩压力
极限分析
有限元法
非线性破坏准则
上限法
侧压力系数
shallow tunnel
surrounding rock pressure
limit analysis
FEM
nonlinear failure criterion
upper limit method
lateral pressure coefficient
