贵广铁路五拱水滑坡工程特性研究

Research on Engineering Characteristics of Wugongshui Landslide on Guiyang-Guangzhou Railway

结合贵广铁路五拱水滑坡工点,在完成详细的地质调绘、开展钻探、孔内取样试验等工作基础上,综合分析了该滑坡体的地质特征、成因机理和工程特性,并结合地质勘察情况对其稳定性进行了评价。研究表明:该滑坡为浅层牵引式土质滑坡,滑体物质为坡残积土层及基岩全风化层滑坡,目前整体处于暂时稳定状态,但稳定性差,在大暴雨等自然力的作用下,滑坡可能再次复活。考虑线路从其前缘通过,斜坡一旦失稳,将造成灾害,故需要进行必要的整治。经过评价其对铁路工程的危害,提出了相应的工程处理措施建议,即采用增设截排水沟、坡面清理以及设置抗滑桩工程等综合工程措施对其进行加固处理。

Based on detailed geology survey,drilling and sampling test in the hole,this paper analyzes the geological characteristics,formation mechanism and engineering features of WuGongShui landslide and estimates its stability combined with geological survey. The result of the analysis shows that the landslide is a shallow pull-type landslide. Because of poor whole stability,the landslide occurs probably again under the action of heavy rainstorm,which will be a huge disaster for the railway crossing in front of the landslide,thus it is necessary to take some corresponding engineering treatment measures for landslide. According to hazard assessment of landslide on railway engineering,some suggestions on the corresponding treatment measures are given,i. e. to setup interception and drainage ditch,clean slope surface and setup anti-sliding pile,etc. for reinforcement treatment.