Loess Slope Stability Prediction Of The Important Section In Yicheng County Of Shanxi Province

Shanxi is one of the most widely distributed loess areas in China.Due to the special mountain terrain,and the bad engineering properties of loess,the loess landslide and the collapse disaster are the most threatening geological disasters to the villages and towns in Shanxi mountainous area.Based on “the detailed investigation of geological disasters in Shanxi Yicheng”,taking the important slope section of Tangxing town as the research object,using the Slope / W and SEEP / W modules in Geo-studio software to quantitatively evaluate the stability of the loess slope under natural conditions ? rainstorm conditions,earthquake conditions and heavy rain + earthquake conditions.Get the following main understanding:1?The front of Dongguan slope is steep,the slope degree is 50-70 °,height is 15-29 m,length is 30 m and width is 400 m.The slope is composed by the upper pleistocene Ma Lan loess.According to the slope direction ?slope degree and the characteristics of slope,the slope is divided into four sections.The first and the second section of the slope are latively low,the third section and the fourth section high and steep,stability of the fourth section was the worst.2?Under the natural condition,the stability coefficient of the first section is1.393,second section is 1.532,third section is 1.185,in stable state;the stability coefficient of the fourth section 5-5' profile position stability coefficient is 1.019,5-5' profile position is 1.008,in understable state,possible destruction mode is landslide.3?Under the rainstorm condition,the stability coefficient of the first section is1.362,second section is 1.476,in stable state;the stability coefficient of the third is1.113,in basically stable state;the stability coefficient of the fourth section 5-5'profile position stability coefficient is 0.976,5-5' profile position is 0.960,in unstable state,possible destruction mode is collapse.4?Under earthquake condition,the stability coefficient of the first section is1.307,second section is 1.378,in stable state;the stability coefficient of the third section is 1.049,in basically stable state;the stability coefficient of the fourth section 5-5' profile position stability coefficient is 0.936,5-5' profile position is0.882,in unstable state,possible destruction mode is landslide.5?Under earthquake + rain conditions,the stability coefficient of the first section is 1.241,second section is 1.362,in stable state;the stability coefficient of the third section is 1.026,in basically stable state;the stability coefficient of the fourth section 5-5' profile position stability coefficient is 0.916,5-5' profile position is 0.841,in unstable state,possible destruction mode is landslide.