| 碎石土隧道自稳性的三维离散元分析 |
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| 引用本文： | 魏龙海,王明年.碎石土隧道自稳性的三维离散元分析[J].岩土力学,2008,29(7):1853-1860. |
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| 作者姓名： | 魏龙海 王明年 |
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| 作者单位： | 西南交通大学 土木工程学院，成都 610031 |
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| 摘 要： | 随着国家对基础设施建设投资力度的不断加大，一些需要穿越碎石土体的隧道不断涌现。针对铁路、公路建设中遇到的碎石土隧道的自稳问题，利用改进后的三维离散元模型及编制的计算软件，对碎石土隧道的自稳性进行了模拟分析，探讨了粒径与隧道自稳性之间的关系，研究了粒径分别为0.1，0.2，0.35，0.5，1，2 m等碎石土隧道能够自稳时的最大跨度，并模拟分析了碎石土隧道塌落量与跨度之间的关系。使用的方法和得出的结论对类似工程有一定的参考意义。
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| 关 键 词： | 三维离散元 碎石土 隧道自稳跨度 粒度 |
| 收稿时间： | 2006-10-09 |
Stability analysis of gravel soil tunnel by three-dimensional discrete element method |
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| WEI Long-hai,WANG Ming-nian.Stability analysis of gravel soil tunnel by three-dimensional discrete element method[J].Rock and Soil Mechanics,2008,29(7):1853-1860. |
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| Authors: | WEI Long-hai WANG Ming-nian |
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| Institution: | School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China |
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| Abstract: | In recent years, some gravel soil tunnels avalanche along with the continual increase of base-building investment by the government. The stabilities of surrounding rocks of gravel soil tunnels which appearanced on the stocks of railway and highway were computed by using improved discrete element method software. Firstly, the self-stability of surrounding rock was analysed. Secondly, the relations between tunnel-stability and gravel diameter were discussed; and the limited-dig-span of tunnel of gravel diameters of 0.1 m, 0.2 m, 0.35 m, 0.5 m, 1 m, 2 m were studied respectively. Finally, the relation between tunnel span and collapse quantity was computed.The method and result can give reference to the similar engineering. |
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| Keywords: | three-dimensional discrete element method gravel soil tunnel self-stability span granularity |
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