| 基于双剪统一强度理论的地下圆形洞室稳定性的研究 |
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| 引用本文： | 徐栓强,俞茂宏,胡小荣. 基于双剪统一强度理论的地下圆形洞室稳定性的研究[J]. 煤炭学报, 2003, 28(5): 522-526 |
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| 作者姓名： | 徐栓强 俞茂宏 胡小荣 |
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| 作者单位： | 1. 西安交通大学,建筑工程与力学学院,陕西,西安,710049;西安工业学院,建筑工程系,陕西,西安,710032
2. 西安交通大学,建筑工程与力学学院,陕西,西安,710049 |
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| 摘 要： | 采用双剪统一强度理论，利用衬砌与围岩的位移协调条件对地下圆形洞室进行了弹塑性分析，获得了圆形洞室围岩应力场、位移场及塑性区半径的分析解，这些解推广了以往的Fenner及Kastner公式，可以合理地考虑中间主应力效应，适用于各种不同的工程材料．分析表明，中间主应力对围岩应力场、位移场、塑性区半径及支护反力均有影响．
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| 关 键 词： | 圆形洞室 弹塑性分析 双剪统一强度理论 |
| 文章编号： | 0253-9993(2003)05-0522-05 |
| 修稿时间： | 2002-12-31 |
The stability analysis of circular tunnel based the twin shear unified strength theory |
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| XU Shuan qiang ,,YU Mao hong ,HU Xiao rong. The stability analysis of circular tunnel based the twin shear unified strength theory[J]. Journal of China Coal Society, 2003, 28(5): 522-526 |
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| Authors: | XU Shuan qiang YU Mao hong HU Xiao rong |
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| Affiliation: | XU Shuan qiang 1,2,YU Mao hong 1,HU Xiao rong 1 |
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| Abstract: | The elasto plastic analysis for a circular tunnel is carried out by use of the condition of displacement coordinate between lining and ground based on the unified strength theory. The solutions for stress field, the displacement field and the extent of plastic zone of the ground for a circular tunnel are derived, which expend and complete the Fenner's formulas and the Kastner's formulas. The present solutions can take account of the effect of the intermediate principal stress, and are suitable for a wide range of materials. The present study shows clearly the effect of the intermediate principal stress on the stress field, the displacement field and the extent of plastic zone, so it is necessary to take account of the effect of the intermediate principal stress in elasto plastic analysis of tunnels. |
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| Keywords: | circular tunnel elasto plastic analysis unified strength theory |
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