| 隧道围岩强度不均地段塌方成因及其处理方法 |
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| 引用本文： | 吴旻硕,李晓.隧道围岩强度不均地段塌方成因及其处理方法[J].力学学报,2008,16(5):672-676. |
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| 作者姓名： | 吴旻硕 李晓 |
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| 作者单位： | 中国矿业大学(北京)力学与建筑工程学院 清华大学水利系，100084 |
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| 基金项目： | 国家重点基础研究发展规划(9730项目(2002CB412702) . |
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| 摘 要： | 采用微面模型理论和损伤力学方法，建立了节理岩体的弹塑性损伤耦合微面模型. 在节理岩体的微
面上，将岩体视为由节理面与岩石组成的二元介质，以节理连通率作为岩体沿该方向的面积
损伤变量，考虑微面法向拉应力和压应力下的不同塑性变形和损伤耦合作用机制，基于塑性
理论建立了节理岩体的微面塑性损伤增量本构关系. 采用微面物理量与宏观物理量的几何约
束模型，根据微面方向积分导出了节理岩体的宏观弹塑性增量本构关系. 编制了节理岩体微
面模型的MARC有限元子程序，对节理岩体的单轴拉伸、压缩试验和泥浆压力作用下的井壁稳
定问题进行了数值模拟研究. 数值计算结果表明，该模型能很好地揭示载荷作用下节理岩体
的各向异性非弹性变形和次生节理演化过程.
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| 关 键 词： | 隧道塌方 围岩强度不均 工字钢梁 超前注浆导管 |
| 收稿时间： | 2007-03-07 |
| 修稿时间： | 2008-07-28 |
CAUSES AND COUNTER - MEASURES FOR COLLAPSE OF ROAD TUN2 NEL IN HARD AND SOFT ROCKS |
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| WU Minshuo,LI Xiao.CAUSES AND COUNTER - MEASURES FOR COLLAPSE OF ROAD TUN2 NEL IN HARD AND SOFT ROCKS[J].chinese journal of theoretical and applied mechanics,2008,16(5):672-676. |
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| Authors: | WU Minshuo LI Xiao |
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| Institution: | Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China |
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| Abstract: | Because of tectonic movement and weathering, a tunnel wall section can have different surrounding rockswith different strengths. Such phenomenon was encountered during the construction of the Lamaling road tun2 nel in 2006. The different rocks can cause p roblems for tunnel construction. They are one of the reasons leading to the tunnel collap se. During the construction of the Lamaliang Tunnel along Hanguo road, a large scale of tunnel collap se occurred. The collap se just happened in soft and hard joint tunnel zone. Based on investigating at the tun2 nel construction site, the I - beam and leading injected condulet are adop ted to treat the condition of hard and soft joint wall rocks. |
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| Keywords: | Tunnel collap se Hard rock Soft rock Hanguo road Geotechnical design Case studies |
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