| 软弱围岩条件公路连拱隧道施工方法数值分析 |
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| 引用本文： | 廖异,符文熹,杨敦才.软弱围岩条件公路连拱隧道施工方法数值分析[J].地质灾害与环境保护,2008,19(4):92-95. |
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| 作者姓名： | 廖异 符文熹 杨敦才 |
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| 作者单位： | 1. 四川大学水利水电学院,成都,610065
2. 中国水利水电第五工程局,成都,610066 |
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| 基金项目： | 四川大学青年科学基金资助项目(编号:07072) |
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| 摘 要： | 针对软弱围岩条件（Ⅳ级围岩）大跨度连拱隧道施工安全和围岩稳定问题，结合工程实际，采用非线性有限元法，对连拱隧道施工过程进行了数值计算分析，对比了中导洞一核心土和三导洞先墙后拱施工工艺下隧道的位移特征、点安全系数、二次衬砌应力、锚杆和钢拱架轴向应力。实际工程研究表明，中导洞一核心土施工工艺开挖软弱围岩条件大跨度公路连拱隧道是可行的，对类似软弱围岩条件的隧洞施工有一定参考价值。
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| 关 键 词： | 连拱隧道 施工方法 软弱围岩 数值仿真 |
NUMERICAL SIMULATION ANALYSIS ON THE CONSTRUCTION METHODS OF A MULT-ARCH ROAD TUNNEL IN WEAK SURROUNDING ROCKS |
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| LIAO Yi,FU Wen-xi,YANG Dun-cai.NUMERICAL SIMULATION ANALYSIS ON THE CONSTRUCTION METHODS OF A MULT-ARCH ROAD TUNNEL IN WEAK SURROUNDING ROCKS[J].Journal of Geological Hazards and Environment Preservation,2008,19(4):92-95. |
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| Authors: | LIAO Yi FU Wen-xi YANG Dun-cai |
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| Institution: | LIAO Yi , FU Wen-xi , YANG Dun-cai (1. School of Water Resource and Hydropower,Chengdu 610065,China; China Hydraulic and Hydroelectric Construction Group Corporation,Engineering Bureau 5,Chengdu 610066,China) |
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| Abstract: | The Construction safety and rock mass stability of shallow multi-arch tunnel in weak surrounding rocks are very critical in projects.Based on a multi-arch road tunnel,the nonlinear Fem is used to study the displacement,point safety factor,lining stress,stress of bolt and steel arch beam in the process of construction under two typical construction plans,including first center leading tunnel and then key rock soil construction plan,first center leading tunnel and then two sidewall leading tunnel construction... |
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| Keywords: | multi-arch tunnel construction plan weak surrounding rock numerical simulation |
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