| 高丽营隧道围岩压力有限元-上限法计算方法研究 |
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| 引用本文： | 何玉珠,刘济遥,张智勇,曹豪荣,雷明锋.高丽营隧道围岩压力有限元-上限法计算方法研究[J].隧道建设,2020,40(Z1):209-215. |
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| 作者姓名： | 何玉珠 刘济遥 张智勇 曹豪荣 雷明锋 |
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| 作者单位： | （1. 中交第三航务工程局有限公司， 上海 200032； 2. 中南大学土木工程学院, 湖南 长沙 410075） |
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| 基金项目： | 中交第三航务工程局有限公司科技开发项目（RD08） |
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| 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。
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| 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 |
Study on Calculation Method of Surrounding Rock Pressure
of Gaoliying Tunnel Based on FEM Upper Limit
Solution |
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| HE Yuzhu,LIU Jiyao,ZHANG Zhiyong,CAO Haorong,LEI Mingfeng.Study on Calculation Method of Surrounding Rock Pressure
of Gaoliying Tunnel Based on FEM Upper Limit
Solution[J].Tunnel Construction,2020,40(Z1):209-215. |
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| Authors: | HE Yuzhu LIU Jiyao ZHANG Zhiyong CAO Haorong LEI Mingfeng |
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| Institution: | (1. CCCC Third Harbor Engineering Co., Ltd.,
Shanghai 200032, China; 2. School of Civil
Engineering, Central South University, Changsha 410075, Hunan, China) |
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| Abstract: | 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. |
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| Keywords: | shallow tunnel surrounding rock pressure limit analysis FEM nonlinear failure criterion upper limit method lateral pressure coefficient |
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