骡坪隧道洞口山体滑坡稳定性分析及治理措施研究  

Study on Stability and Control Measures of Landslide at Entrance of Luoping Tunnel

作　　者：林承华[1] 胡志平[1] 吴银亮[1] LIN Chenghua;HU Zhiping;WU Yinliang(CCCC Second Highway Consultants Co., Ltd., Wuhan 430056, China)

机构地区：[1]中交第二公路勘察设计研究院有限公司,武汉430056

出　　处：《路基工程》2019年第2期225-229,共5页Subgrade Engineering

基　　金：交通运输部2009年行业联合科技攻关项目:宜巴高速公路特殊岩土体对工程的影响与防治的关键技术研究(2009353342540)

摘　　要：骡坪隧道洞口山体边坡因暴雨影响出现裂缝,沿隧道顶上方横向贯通发生滑坡,通过地质勘探研究工程地质条件,分析滑坡变形特征及变形原因,使用勘查数据进行滑坡稳定性分析,并确定了治理措施。结果表明:斜坡治理前,天然工况和降雨工况下滑坡的安全系数分别为1.167,1.025;采用削坡、坡体注浆、锚索框架等治理措施后,山体滑坡在天然工况和降雨工况下的安全系数分别为1.360,1.210,降低了边坡地下水位,减小了渗水压力,改善了边坡稳定条件,提高了边坡稳定性,达到设计安全要求。For the influence of rainstorm on the slope of the entrance of the Luoping tunnel, cracks started appearing and the landslide was transversely occured through the top of the tunnel. The engineering geological condition was found out by geological exploration. The landslide deformation characteristics, deformation reasons and landslide stability are analyzed by using exploration data and the control measures are determined. The results show that before the slope treatment, the safety factor of landslide under natural and rainfall conditions is 1.167 and 1.025 respectively, and the safety factor of landslide is 1.360 and 1.210 respectively under natural and rainfall conditions after cutting slope, slope grouting, anchor frame and other measures. The measures have reduced the underground water level of the slope, reduced the seepage pressure, improved the stability condition of the slope, improved the stability of the slope, and achieved the safety requirements of the design, providing reference and reference for similar projects.

关 键 词：隧道洞口 山体边坡 滑坡成因 稳定性 治理措施 

分 类 号：U416.14[交通运输工程—道路与铁道工程]