| 高地应力软岩隧道不同施工方法数值模拟变形分析研究 |
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| 引用本文： | 黄俊,梁庆国,岳琳琳,樊纯坛.高地应力软岩隧道不同施工方法数值模拟变形分析研究[J].铁道标准设计通讯,2018(5). |
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| 作者姓名： | 黄俊 梁庆国 岳琳琳 樊纯坛 |
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| 作者单位： | 土木工程国家级实验教学示范中心(兰州交通大学);甘肃省道路桥梁与地下工程重点实验室;兰州交通大学土木工程学院 |
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| 摘 要： | 结合木寨岭隧道的实际施工方法,采用三维有限元软件Midas/GTS,分别对隧道的4种施工方法进行数值模拟,4种施工方法分别为全断面法、二台阶法、三台阶法和超前导洞扩挖法。选取适当的物理力学参数进行数值建模,从模拟结果中提取拱顶沉降、水平收敛、隧道应力、塑性区等数据进行对比分析,从而得出最优的施工方法,即适用于高地应力软岩隧道的施工方法,以及相应的支护措施。并在讨论部分引用类似状况隧道实测数据进行对比分析,验证数值模拟的合理性和正确性,可以为高地应力软岩隧道设计施工提供一定的参考。
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| 关 键 词： | 高地应力 软岩 数值模拟 施工方法 变形 |
Numerical Simulation Analysis of High Ground Stress Soft Rock Tunnel Deformation Subject to Different Construction Methods |
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| Institution: | ,National Demonstration Center for Experimental Civil Engineering Education (Lanzhou Jiaotong University),School of Civil Engineering,Lanzhou Jiaotong University |
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| Abstract: | Combined with the actual construction method of the Muzhailing tunnel,the three-dimensional finite element analysis software MIDAS-GTS is used to simulate and analyze four different tunnel construction methods,which are full face method,two-step method,three-step method,pilot heading and expanding excavation method. Appropriate physical and mechanical parameters are selected to establish the model,from which data are extracted such as vault settlement,horizontal convergence,tunnel stress,plastic zone to obtain the optimal construction method suitable for high ground stress soft rock tunnel construction and corresponding support measures. Similar tunnel test data are quoted and compared to verify the rationality and correctness of the numerical simulation,which may serve as reference for design and construction of high ground stress tunnels. |
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| Keywords: | High ground stress Soft rock Numerical simulation Construction method Deformation |
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