| 岩质隧道开挖稳定性脆弹塑性损伤分析 |
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| 引用本文： | 谢红强,徐家始,邵江.岩质隧道开挖稳定性脆弹塑性损伤分析[J].红水河,2005,24(3):53-56,68. |
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| 作者姓名： | 谢红强 徐家始 邵江 |
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| 作者单位： | 1. 西南交通大学土木工程学院,四川,成都,610031
2. 重庆市水利投资(集团)有限公司,重庆,401147 |
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| 摘 要： | 岩质隧道的施工过程是典型的卸载力学过程.由于岩体在加载和卸载条件下应力路径的不同,仅采用加载条件下所建立的力学模型来研究隧道的开挖稳定性问题是不适合的.笔者从隧道围岩的力学性能及破坏机理出发,引入损伤力学理论,建立三维非线性脆弹塑性损伤有限元模型,研究在加、卸载条件作用下隧道施工全过程的围岩稳定性,为实际工程提供理论指导作用.
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| 关 键 词： | 岩质隧道 开挖稳定性 卸载条件 损伤力学 脆弹塑性 有限元分析 |
| 文章编号： | 1001-408X（2005）03-0053-04 |
| 收稿时间： | 2005-05-19 |
| 修稿时间： | 2005-05-192005-07-13 |
Analysis of Excavation Stability in Hard Rock Tunnel by Brittle Elastoplasticity Damage FEM |
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| XIE Hong-qiang,XU Jia-shi,SHAO Jiang.Analysis of Excavation Stability in Hard Rock Tunnel by Brittle Elastoplasticity Damage FEM[J].Hongshui River,2005,24(3):53-56,68. |
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| Authors: | XIE Hong-qiang XU Jia-shi SHAO Jiang |
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| Affiliation: | 1. School of Civil Engineering, Southwest Traffic University, Chengdu 610031, China; 2. Chongqing Water Conservancy Investment Group Co., Ltd., Chongqing 401147, China |
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| Abstract: | Construction process of rock tunnels is a typical unloading mechanical process. Due to the difference in stress paths between the loading and unloading conditions, it is unsuitable to apply mechanical model under loading condition to stability of tunnel excavation. Based on mechanical behavior of surrounding rock and its failure mechanism, introducing the theory of damage mechanics, this paper establishes a 3D nonlinear elastoplastic damage FEM model under unloading conditions, which is used to study the stability of surrounding rock during excavating tunnel under combined effect of loading and unloading actions so as to provide directions for practical engineering problems. |
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| Keywords: | rock tunnel stability of excavation unloading condition damage mechanics elastoplasticity finite element analysis |
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