Shallow Stability Analysis of Red Clay Slope Considering the Influence of Fissure
HUANG Lihua1,LIU Shunqing2
1.School of Civil Engineering , Hexi University , Zhangye 734000, China;2.School of Architecture and Civil Engineering , Jiangsu University of Science and Technology , Zhenjiang 212100, China
The shear strength and residual shear strength parameters under different water contents of red clay are measured by direct shear tests. The depth of fissure of red clay slope is determined by using humidity coefficient, field grooving test and statistical data of fissures. The shallow stability of red clay slope considering the influence of fissure is analyzed by using the two-dimensional finite element analysis software Midas Soilworks. The computing results are compared with the shallow safety factor without considering fissures. The computing results indicate that the sliding surfaces of red clay slopes gradually change from deep to shallow with the increase of water contents, and finally the sliding surface is in the range of the depth of fissure. The shallow safety factor of the red clay slope is the most obvious before the saturation of the red clay. Compared with the red clay slopes without fissures, the absolute attenuation rate of the shallow safety factor is between 20.4% and 32.0%.