| 隧洞地表稳定性监测及计算分析 |
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| 引用本文： | 贾剑青,王宏图,刘大鹏,安龙奇.隧洞地表稳定性监测及计算分析[J].岩土力学,2009,30(12):3765-3770. |
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| 作者姓名： | 贾剑青 王宏图 刘大鹏 安龙奇 |
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| 作者单位： | 1.兰州交通大学 交通运输学院，兰州 730070；2.重庆大学 西南资源开发及环境灾害控制工程教育部重点实验室，重庆 400044 |
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| 基金项目： | 兰州交通大学'青蓝'人才工程基金资助计划资助，国家自然科学基金，国家重点基础研究发展规划(973)项目，国家自然科学创新群体基金 |
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| 摘 要： | 李子坝隧洞埋深较浅，进出口围岩较软弱，隧洞上方房屋密布，且有一居民用水塔。根据工程实际，隧洞初期支护采用超前管棚+工字钢架+喷射混凝土进行联合支护；隧洞底部灌浆并施作仰拱；二次支护采用钢筋混凝土直边墙半圆拱。为确保施工安全及施工过程中地表建筑物的稳定，对隧洞稳定性进行理论计算，求得在此状态下，最危险断面处隧洞的稳定性系数为1.9；施工过程中对地表房屋、水塔、隧洞拱顶及边墙的变形及沉降情况进行监测。监测结果表明，地表建筑物沉降量均较小；水塔沉降量小且各点下沉协调一致，则水塔不会倾倒；隧洞拱顶及边墙变形均较小。
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| 关 键 词： | 隧道 稳定性 监测 沉降 |
| 收稿时间： | 2008-05-22 |
Monitoring and analysis of tunnel surface stability |
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| JIA Jian-qing,WANG Hong-tu,LIU Da-peng,AN Long-qi.Monitoring and analysis of tunnel surface stability[J].Rock and Soil Mechanics,2009,30(12):3765-3770. |
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| Authors: | JIA Jian-qing WANG Hong-tu LIU Da-peng AN Long-qi |
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| Institution: | 1. School of Traffic and Transportation, Lanzhou Jiaotong University, Lanzhou 730070, China; 2.Key Laboratory for the Exploitation of Southwestern Resources & the Environmental Disaster Control Engineering, Ministry of Education, Chongqing University, Chongqing 400044, China |
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| Abstract: | The buried depth of Liziba tunnel is shallow, and surrounding rocks at entrance and exit are soft. Many houses and one water tower have been constructed over the tunnel. According to the engineering condition, the ahead ductile, I-steel and shotcrete are used in the first support, grounting and inverted arch are constructed at tunnel bottom, and the semicircular arch of reinforced concrete is used in the second lining. To ensure the construction safety and the building stability during construction, the stability of the most dangerous section is calculated, and the calculated stability factor is 1.9. The settlements of the surface, the water tower and the houses are monitored, and the arch settlement and horizontal convergence of the side-wall are monitored, too. The results show that settlements of the surface and the houses are little, the settlement of water tower goes down equably, and the deformations of arch and side-wall are little, too. |
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| Keywords: | tunnel stability monitoring settlement |
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