【摘要】 以青海省南部省道红土山段滑坡为例,在分析区域地质概况和滑坡特征的基础上,对滑坡机理及影响滑坡的因素进行分析,确定滑坡滑动模式;选取合理的计算参数进行滑坡稳定性计算,根据计算结果对滑坡稳定性进行分析。得到以下结论:产生滑坡体病害的主要原因是滑坡所处区域冻土深度较大,区域冬夏温差大,地表水下渗后冻胀,次年夏初消融,这使粘性土及泥岩泥化,粘聚力降低,周而复始,滑体不断蠕动下滑。采用传递系数法对滑坡在不同工况下的稳定性进行计算,结果表明,在天然状态下滑坡浅层滑面处于蠕动变形状态,深层滑面基本稳定;在考虑暴雨和地震的条件下,滑坡处于不稳定状态。更多还原

【Abstract】 This paper takes a landslide in south Qinghai Province as an example,on the basis of the analysis of regional geology and landslide characteristics,analyzed the mechanism of landslide and factors influencing landslide,determined the sliding mode,selected rational parameters for landslide stability calculation,carried out analysis of landslide stability according to the calculation result,summarized the mechanism and reasons of landslide in the area,providing reference experiences for similar geological disaster management.Through the analysis and calculation it concludes: the cause for occurrence of landslide hazards is poor lithology,frozen soil depth in the area where landslide is located is larger,regional temperature difference between summer and winter is large,surface water is frozen in winter and melt in next summer,inducing muddy clay and shale as well as lower cohesion,sliding body creeps continuously and slides down.By using transfer coefficient method,the stability of landslide in different conditions is calculated.The results show that under the natural conditions,shallow sliding surface of landslide is in creep deformation condition,deep sliding surface is basically stable,in consideration of rainstorm and seismic conditions,the landslide is in unstable state.更多还原