| 锚杆参数对围岩稳定性影响的数值分析 |
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| 引用本文： | 徐立功,李浩,陈祥林,陈军. 锚杆参数对围岩稳定性影响的数值分析[J]. 岩土工程学报, 2010, 0(Z2) |
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| 作者姓名： | 徐立功 李浩 陈祥林 陈军 |
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| 作者单位： | 中交公路规划设计院有限公司;江苏省交通规划设计院;上海交通大学船舶海洋与建筑工程学院; |
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| 摘 要： | 结合强度折减法对隧道开挖过程中围岩稳定性进行模拟分析,研究了随着折减系数的变化,隧道围岩塑性区的变化情况。对于不同的工况,通过对锚杆参数(锚杆长度、锚杆间距和锚杆直径)的模拟比较,得出锚杆长度对改善围岩稳定性效果最明显,其次是锚杆间距,最后是锚杆直径。结合后云台山隧道工程实例,分析后云台山隧道开挖后围岩稳定性变化,其稳定性良好,满足施工要求。
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| 关 键 词： | 强度折减法 锚杆支护 隧道开挖 围岩稳定 数值分析 |
Numerical analysis on the impact of rock bolt parameters on stability of surrounding rock |
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| XU Li-gong,LI Hao,CHEN Xiang-lin,CHEN Jun. Numerical analysis on the impact of rock bolt parameters on stability of surrounding rock[J]. Chinese Journal of Geotechnical Engineering, 2010, 0(Z2) |
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| Authors: | XU Li-gong LI Hao CHEN Xiang-lin CHEN Jun |
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| Affiliation: | XU Li-gong1,LI Hao2,CHEN Xiang-lin3,CHEN Jun3 (1.CCCC Highway Consultants Co.,Ltd.,Nanjing 210012,China,2.Jiangsu Traffic&Plan Design Institute,Nanjing 210005,3.School of Naval Architecture Ocean&Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240 China) |
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| Abstract: | Combined with the simulation of stability of surrounding rock based on strength reduction finite element method,the situation of plastic zone is studied varying with the discount factor.For different working conditions,comparing with different blot lengths,blot spacing distance and blot diameter,the result shows that rock bolt length is the most significant factor that influent the stability of surrounding rock,followed by the bolt spacing distance,and the last is blot diameter.Additionally,the regularity o... |
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| Keywords: | strength reduction method bolt support tunnel excavation stability of surrounding rock numerical analysis |
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