| 乌鞘岭特长隧道复杂地质条件下断层带应力及变形现场监测分析 |
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| 引用本文： | 雷军,张金柱,林传年.乌鞘岭特长隧道复杂地质条件下断层带应力及变形现场监测分析[J].岩土力学,2008,29(5):1367-1371. |
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| 作者姓名： | 雷军 张金柱 林传年 |
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| 作者单位： | 1.北京交通大学 土木建筑工程学院，北京 100044；2.铁道部工程管理中心 乌鞘岭隧道建设指挥部，兰州 730000； 3.兰州大学 土木工程与力学学院，兰州 730000 |
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| 摘 要： | 乌鞘岭隧道是我国迄今为止已建成最长的单线铁路隧道，隧道总长约为20.05 km，而F7断层是乌鞘岭隧道中最长、地质条件最为复杂的活动断层，对隧道施工十分不利。根据F7断层特点及施工中遇到的问题，在乌鞘岭隧道岭脊地段F7断层区段，对洞室开挖后的围岩及支护衬砌结构进行各项应力监测和收敛变形监测，分析了围岩、衬砌系统受力及变形变化趋势，从而探究围岩挤压大变形的机制，掌握围岩应力释放与围岩压力的作用规律；并根据现场监测结果，提出对隧道穿越F7断层区段的断面采用动态优化设计方案及改进的施工措施，避免隧道出现大变形，从而保证隧道穿越F7断层区段安全、快速的进行。
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| 关 键 词： | 隧道工程 断层 应力监测 变形监测 隧道安全 |
| 文章编号： | 1000-7598-(2008)05-1367-05 |
| 收稿时间： | 2006-12-11 |
| 修稿时间： | 2006年12月11 |
Analysis of stress and deformation site-monitoring in fault zone of Wushaoling tunnel under complex geological conditions |
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| LEI Jun,ZHANG Jin-zhu,LIN Chuan-nian.Analysis of stress and deformation site-monitoring in fault zone of Wushaoling tunnel under complex geological conditions[J].Rock and Soil Mechanics,2008,29(5):1367-1371. |
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| Authors: | LEI Jun ZHANG Jin-zhu LIN Chuan-nian |
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| Institution: | 1. School of Civil Engineering & Architecture, Beijing Jiaotong University, Beijing 10044, China; 2. Wushaoling Tunnel Headquarters, Engineering Management Center of MOR, Lanzhou 730000, China; 3.School of Civil Engineering And Mechanics,LanZhou University,LanZhou,730000 |
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| Abstract: | Wushaoling tunnel is the longest single line railway tunnel in China up to now with the length of 20.50 km, and the F7 fault is the largest active fault, in which the geological conditions is highly complicated; it effects the tunnel construction badly. According to the characteristics of F7 fault and the problems met in tunnel construction, the stress and displacement of rock wall and lining structures were long term monitored after excavating in F7 fault section of Wushaoling tunnel. The trend of stress and displacement changing are analyzed based on the site monitoring results; and the mechanism of the extrusion large-deformation are explored so as to understand the regulation of stress releasing of rock wall and rock pressure. Furthermore, based on the site monitoring results, the optimized dynamic design and improved construction measure are proposed and adopted for the section at which the tunnel crosses the F7 fault. It not only avoided the large deformation occurrence, but also guaranteed tunnel drilling through the F7 fault section safely and quickly. |
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| Keywords: | tunnel engineering fault stress monitoring deformation monitoring tunnel safety |
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