| 层状岩体围岩变形破坏特征及稳定性评价 |
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| 引用本文： | 夏彬伟,陈果,康勇,周东平. 层状岩体围岩变形破坏特征及稳定性评价[J]. 水文地质工程地质, 2010, 37(4): 48-52 |
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| 作者姓名： | 夏彬伟 陈果 康勇 周东平 |
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| 作者单位： | 重庆大学西南资源开发及环境灾害控制工程教育部重点实验室;重庆锦程工程咨询有限公司; |
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| 基金项目： | 中央高校基本科研业务费资助，国家创新研究群体基金 |
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| 摘 要： | 层状岩体是地下工程中经常遇到的一种岩体,具有明显的各向异性力学性质,其变形破坏特征与均值岩体相比表现得更为复杂。根据共和隧道地质调查和地应力量测的资料分析,隧道围岩偏压现象与地应力和岩性有极大的相关性。通过对隧道初期支护开裂段围岩位移收敛、围岩接触压力、锚杆轴向力监测和松动圈探测,其结果表明,围岩变形及应力和松动圈都在右拱肩处最大,即靠河侧大于靠山侧,与初始地应力的最大主应力方向不一致。因此,通过现场监测提前了解围岩-支护结构的变形及受力状况,及时修改了支护参数,避免了隧道垮塌等恶性事件的发生,从而有效指导了隧道施工和设计。
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| 关 键 词： | 层状岩体 围岩变形特征 稳定性评价 |
Deformation characteristic and stability analyses of layered rockmass |
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| XIA Bin-wei,CHEN Guo,KANG Yong,ZHOU Dong-ping. Deformation characteristic and stability analyses of layered rockmass[J]. Hydrogeology and Engineering Geology, 2010, 37(4): 48-52 |
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| Authors: | XIA Bin-wei CHEN Guo KANG Yong ZHOU Dong-ping |
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| Affiliation: | 1.China Education Ministry’s Key Lab.for the Exploitation of South West Resources and the Environmental Disaster Control Engineering,Chongqing University,Chongqing 400044,China;2.Chongqin Jincheng Engineering Consulting Co.LTD,Chongqin 401147,China |
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| Abstract: | Layered rockmass which is always met in underground engineering has obvious anisotropic mechanical properties.Compared with the isotropic rockmass,its failure features are more complicated.According to the geologic reconnaissance and in-situ stress measurement of Gonghe tunnel,the tunnel rockmass bias pressure has close relationship with in-situ stress and lithology.By the monitoring and detecting of the convergence displacement of surrounding rock in section of failure of primary support,surrou... |
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