多年冻土区低填方斜坡路堤的稳定性分析

通过对青藏铁路多年冻土区斜坡路堤的稳定性状况调查发现,在运营期,低填方斜坡路堤为较易出现病害的路堤结构形式,且纵向裂缝为主要病害形式,直接影响到斜坡路堤的稳定.因此,就低填方斜坡路堤的变形破坏机理、影响因素以及其稳定性状况分析和评价等问题进行了研究,阐明了低填方斜坡路堤的内部作用机理.并通过现场典型工程断面的稳定性分析进行论证,对于运营期多年冻土区斜坡路堤工程的维修养护工作具有重要的应用价值.

Analysis on the Stability Status of Low-fill Slope Embankment in Permafrost Regions

Having investigated the stability status of slope embankment of Qinghai-Tibet railway in permafrost regions,something is found that,in the operating period,low-fill slope embankment is the structure which is prone to produce disease,and the longitudinal cracks which as the main disease forms,directly affects the stability of slope embankment.Therefore,the mechanism of deformation and failure of low-fill slope embankment,its influencing factors as well as its stability status analysis and evaluation are studied,then its internal mechanism is clarified. In the end,it is demonstrated by analyzing the stabdlty of the typical cross section in site. And it is very important to the maintenance and conservation works of the slope embankment in operating period in permafrost regions.