摘要
为研究降雨对煤系地层路堑边坡稳定性影响,以晴兴高速K16滑坡为例,通过工程地质调绘、钻探等手段查明滑坡基本特征,采用数值模拟计算分析,研究降雨入渗对滑坡作用机理及稳定性影响。结果显示,降雨入渗是引发滑坡失稳的关键诱因,滑坡前、后缘的孔隙水压力随降雨持续而增大,整体呈“S”形,滑坡中部受地形、地质条件影响,孔隙水压力呈缓慢增长趋势;滑坡稳定型系数随降雨持时的增加而不断降低,并在后期呈现快速下降趋势。
In order to study the influence of rainfall on the stability of cutting slope in coal measure strata,K16 landslide of Qingxing expressway is taken as an example,through engineering geological mapping,drilling and other means to identify the basic characteristics of the landslide,using numerical simulation calculation and analysis,to study the effect of rainfall infiltration on the mechanism and stability of the landslide.The results show that rainfall infiltration is the key inducement of landslide instability,the pore water pressure at the front and back edge of landslide increases continuously with rainfall,which is S-shaped as a whole,the pore water pressure in the middle part of landslide increases slowly under the influence of topography and geological conditions.The stability coefficient of landslide decreases continuously with the increase of rainfall,and decreases rapidly in the later period.
作者
曾耀
王琦
李春峰
姜波
曹俊
Yao Zeng;Qi Wang;Chunfeng Li;Bo Jiang;Jun Cao(Guizhou Transportation Planning Survey and Design Academe Co.,Ltd.,Guiyang 550001,China)
出处
《青海交通科技》
2020年第2期74-79,共6页
Qinghai Transportation Science and Technology
关键词
煤系地层
降雨
孔隙水压力
稳定性
数值模拟
coal measure strata
rainfall
pore water pressure
stability
numerical simulation