| 岩溶隧道掘进时地下附属结构的监测分析 |
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| 引用本文： | 刘辉,李波,彭川,吴从师,吴羡.岩溶隧道掘进时地下附属结构的监测分析[J].公路交通科技,2010,27(4). |
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| 作者姓名： | 刘辉 李波 彭川 吴从师 吴羡 |
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| 作者单位： | 1. 长沙理工大学,土木与建筑学院,湖南,长沙,410076
2. 广东清连高速发展有限公司,广东,清远,511500 |
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| 基金项目： | 湖南省自然科学基金资助项目(08JJ3102) |
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| 摘 要： | 岩溶地区修建公路隧道时,把溶洞的处理和施工监测工作放在首要位置,准确掌握围岩沉降、收敛规律以及支护压力的变化,便于及时调整支护和施工参数。针对隧道穿过特大溶洞边墙的情况,采取上下台阶法施工并施做了支顶结构和临时支撑墙确保在隧道开挖过程中围岩的稳定性及施工安全。通过对白须公特大溶洞隧道的溶洞支顶结构的应力应变以及老虎嘴处临时支撑结构承受上部围岩压力在施工过程时间变化特性分析,探讨不同的隧道开挖方式对围岩的扰动影响,并分析了地下附属结构物的回应。通过对结构物的监测分析可以看出:溶洞对支顶结构的影响主要表现为水平推力,竖直压力较小;老虎嘴上部岩层中软弱夹层对围岩整体稳定影响较小,没有产生过大松动压力。
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| 关 键 词： | 隧道工程 监测分析 附属结构 溶洞 |
Analysis of Monitoring Underground Accessory Structure during Tunnel Excavation in Karst Area |
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| LIU Hui,LI Bo,PENG Chuan,WU Congshi,WU Xiang.Analysis of Monitoring Underground Accessory Structure during Tunnel Excavation in Karst Area[J].Journal of Highway and Transportation Research and Development,2010,27(4). |
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| Authors: | LIU Hui LI Bo PENG Chuan WU Congshi WU Xiang |
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| Institution: | 1.School of Bridge and Structure Engineering;Changsha University of Sciences and Technology;Changsha Hunan 410076;China;2.Guangdong of Qingyuan-Lianzhou Expressway Development Co.;Ltd.;Qingyuan Guangdong 511500;China |
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| Abstract: | Limestone cave treatment and construction monitoring are critical for highway tunnel construction in karst area.Accurate controlling surrounding rock settlement,convergence regularity and changes of support pressure in the process of tunnel excavation are helpful for timely adjustment of support and construction parameters.In view of the tunnel traversing the side wall of a grand karst cave,the benching tunneling method was applied and the reacting wall as well as the temporary supporting wall were added du... |
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| Keywords: | tunnel engineering monitoring analysis accessory structure karst cave |
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