| 公路隧道特大塌方成因分析及综合处治方法研究 |
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| 引用本文： | 李志厚,杨晓华,来弘鹏,晏长根.公路隧道特大塌方成因分析及综合处治方法研究[J].工程地质学报(英文版),2008,16(6):806-812. |
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| 作者姓名： | 李志厚 杨晓华 来弘鹏 晏长根 |
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| 作者单位： | 1.长安大学公路学院 西安 710064 |
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| 摘 要： | 结合元磨高速公路大风垭口隧道工程在施工过程中下行线K255+283出现的特大塌方事故，论文综合分析认为该段位于断层突泥富水带且塌方发生前曾发生涌水、塌方，在此基础上提出地表与洞内处治相结合并加以洞内排水的综合处治措施，综合监测和评判结果表明，综合处治后，塌方断面附近初期支护及二次衬砌的受力及变形均未发生异常变化，有关应力和变形在经过一段时间的变化后最终趋于稳定，而且其相关变化值都在很大的允许范围内，证明处治措施不仅理论上可靠，而且现实中安全可行，对未来公路隧道施工塌方处治工作有所指导和借鉴作用。
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| 关 键 词： | 公路隧道，特大塌方，处治措施 |
A CASE STUDY ON THE CAUSE AND TREATMENT OF HUGE COLLAPSE OF HIGHWAY TUNNEL DURING CONSTRUCTION |
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| Institution: | 1.Highway School of Chang′an University, Xi′an |710064 2.Yunnan Highway Planning Prospecting and Design Institute, Kunming |650011 |
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| Abstract: | During construction,a huge collapse occurred between the down lines from K225 to K283 of the Fengyakou tunnel of Yuanmo highway in Yunnan Province.This paper analyses the reasons for the cause of the huge collapse.It is found that the collapse was due to the section located at a fault zone with rich groundwater and slurry often gushing.The paper provides the treatment measures including surface treating,underground treating and drainage in the collapsed tunnel.Monitored results showed that e the stress and deformation of the preliminary bracing and second lining of the tunnel cross section had no change,which indicate that the force and deformation were becoming stable,and the change was with in the limits.The monitored results also showed that the treatments were not only reliable in theory,but also sound in practice,and can be a good guide and reference for the treatment of similar highway tunnel collapses. |
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| Keywords: | Highway tunnel Huge collapse Treating measures Fault Groundwater Slurry |
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