| 岩溶尺寸对隧道围岩稳定性影响的模型试验研究 |
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| 引用本文： | 赵明阶,敖建华,刘绪华,王彪.岩溶尺寸对隧道围岩稳定性影响的模型试验研究[J].岩石力学与工程学报,2004,23(2):213-217. |
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| 作者姓名： | 赵明阶 敖建华 刘绪华 王彪 |
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| 作者单位： | 1. 重庆交通学院河海建筑工程系,重庆,400074
2. 湖北省恩施州交通规划设计院,恩施,445000 |
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| 基金项目： | 重庆市重点科技攻关项目(2001-25-03)，湖北省恩施州318国道朝东岩隧道项目部(20010101)资助项目 |
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| 摘 要： | 利用公路隧道结构与围岩综合试验系统，对石灰岩地区大断面隧道开挖过程中，不同大小溶洞对隧道围岩稳定性的影响进行相似模型试验研究，并运用ANSYS软件进行了弹塑性有限元数值分析：三维动态施工过程模拟与试验结果均表明，溶洞对围岩的变形有较大影响，随着溶洞尺寸的增加，开挖前的围岩先期位移和开挖瞬间的释放位移均有较大幅度的增长，同时，溶洞区的开挖对无溶洞区的围岩变形有放大作用。
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| 关 键 词： | 隧道围岩 稳定性 岩溶 公路隧道 石灰岩 弹塑性 模型试验 数值分析 |
| 文章编号： | 1000-6915(2004)02-0213-05 |
| 收稿时间： | 2002-4-16 |
| 修稿时间： | 2002-6-18 |
MODEL TESTING RESEARCH ON INFLUENCE OF KARST CAVE SIZE ON STABILITY OF SURROUNDING ROCKMASSES DURING TUNNEL CONSTRUCTION |
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| Zhao Mingjie,Ao Jianhua,Liu Xuhua,Wang Biao.MODEL TESTING RESEARCH ON INFLUENCE OF KARST CAVE SIZE ON STABILITY OF SURROUNDING ROCKMASSES DURING TUNNEL CONSTRUCTION[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(2):213-217. |
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| Authors: | Zhao Mingjie Ao Jianhua Liu Xuhua Wang Biao |
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| Affiliation: | Zhao Mingjie1,Ao Jianhua2,Liu Xuhua2,Wang Biao2 |
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| Abstract: | Based on the comprehensive testing system for structure and surrounding rockmasses of highway tunnel (CTSSSRH),taking Chaodongyan Tunnel as an example,a test concerning the influence of karst cave size on stability of surrounding rockmasses during tunnel construction is carried out through physical and numerical modeling. The ANSYS software is used for 3D elastic-plastic FE analysis,and the yield initiation is assumed to occur following Druck-Prager failure criterion. The results of physical model testing and numerical analysis show that the deformation of surrounding rockmasses of tunnel varies with increase of the karst cave size. The excavation of tunnel with karst caves will amplify the deformation of the surrounding rockmasses of tunnel without karst caves. |
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| Keywords: | tunneling engineering karst caves surrounding rockmasses of tunnel model testing numerical analysis |
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