| 穿越断层破碎带隧道支护结构受力特性分析 |
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| 引用本文： | 刘洋,赖孝辉,李永林,牟力,王浩,杨文波.穿越断层破碎带隧道支护结构受力特性分析[J].路基工程,2021,0(3):235-240. |
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| 作者姓名： | 刘洋 赖孝辉 李永林 牟力 王浩 杨文波 |
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| 作者单位： | 西南交通大学交通隧道工程教育部重点实验室,成都 610031;四川藏区高速公路有限责任公司,成都 610041 |
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| 基金项目： | 国家自然科学基金资助项目（51678499）；四川省科技计划项目（2019YFG0001） |
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| 摘 要： | 依托雅康高速公路紫石隧道，建立三维数值模型，运用有限差分软件分析围岩施工期的应力和变形特征，研究穿越断层破碎带隧道的支护结构受力特性。结果表明:断层破碎带处围岩和衬砌的变形相对普通断面均较大；在断层破碎带与普通岩体交界处会产生非均匀变形，导致衬砌结构出现压应力集中现象；隧道二衬达到受力稳定状态需要较长时间，且安全系数较低。
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| 关 键 词： | 隧道工程 断层破碎带 支护结构 数值分析 现场监测 |
| 收稿时间： | 2020-08-13 |
Analysis on the Mechanical Characteristics of Tunnel Supporting Structure Passing through Fault Fracture Zone |
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| Abstract: | Based on the Zishi tunnel of Yakang (Ya'an—Kangding) Expressway, through the establishment of a three-dimensional numerical model, the stress and deformation characteristics of surrouding rock during the construction are analyzed by using the finite difference software.The mechanical characteristics of the tunnel supporting structure passing through the fault rupture zone are studied. The results show that the deformation of surrounding rock and lining in the fault fracture zone is larger than that in the normal section. Non-uniform deformation occurs at the junction of fault fracture zone and normal rock mass, which results in compressive stress concentration of lining structure. It takes a relatively long time for the second lining of the tunnel to reach the stable state of force with a rather low safety factor. |
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