万梁高速某滑坡降雨入渗稳定性及处治技术研究  

Study on Stability and Treatment Technology of Rainfall Infiltration in a Landslide of Wangzhou-Liangping Highway

作　　者：崔光耀 左奎现 张军徽 荆鸿飞 

机构地区：[1]北方工业大学土木工程学院,北京100144 [2]中铁第五勘察设计院集团有限公司,北京102600

出　　处：《灾害学》2018年第1期117-121,共5页Journal of Catastrophology

基　　金：国家自然科学基金(51408008;51478277);四川省应用基础研究计划项目(2014JY0090;2015JY0166);四川省交通科技项目(2013A1-5);北方工业大学科研创新团队(XN018007)

摘　　要：依托万梁高速某滑坡,利用有限差分数值模拟技术对其降雨时的稳定性及处治技术进行了研究。结果表明:当浅层滑体部分饱和时,浅层滑体的稳定性较好,不会沿滑面整体失滑;当浅层滑体饱和时,浅层滑体会产生变形滑移,最终全部失滑,而中层滑体不会发生变形滑移;当浅、中层滑体均饱和时,浅层滑体全部失滑,中层滑体仅产生较大位移,不会发生失稳现象;在设置支档结构后,浅层滑体和中层滑体在饱和静水压力下的稳定性均可以得到保障;浅层滑体始终在失稳滑移过程中占据主导地位;持续的降雨会使滑体中形成饱和静水压力,导致滑面岩土参数被弱化。研究成果可为类似滑坡的稳定性及处治技术的研究提供借鉴。Based on a landslide of Wangzhou-Liangping Highway,we study the stability and treatment technique of continuous rainfall by finite difference numerical simulation technique. It is shown that when the shallow slip body is partially saturated,the stability of the shallow slab is better and does not slip along the slippery surface,and when the shallow sliding body is saturated,the shallow sliding body produces deformation slip and finally all slip,and the middle layer does not occur deformation slip. When the shallow and middle slip is saturated,the shallow sliding bodies are all slippery,and the middle layer of the body only a large displacement and there will be no instability phenomenon. The shallow sliding body will slip under the effect of saturated hydrostatic pressure,and ultimately all slip,and the middle layer of the body only produce a large displacement,there will be no instability phenomenon. After setting the retaining structure,the stability of the shallow and middle sliding body can be guaranteed. Shallow slippers are always dominant in the process of unsteady slip. Continuous rainfall will form a saturated hydrostatic pressure in the body,resulting in weakening of the sliding geotechnical parameters. The research results can provide reference for the research of stability and treatment of landslide.

关 键 词：滑坡 降雨 稳定性 处治技术 

分 类 号：X43[环境科学与工程—灾害防治] P642[天文地球—工程地质学]