Numerical analysis of rainfall saturated-unsaturated seepage and stability of expansive soil slope with fissures

Dinggui Hou, Zhigang Tao, Zhenli Hao, Jiamin Wang
2015 Proceedings of the 2015 International Conference on Structural, Mechanical and Material Engineering   unpublished
The existence of fissures is an important factor in expansive soil slope landslide under rainfall conditions. In order to explore the changes characteristic of expansive soil slope seepage field and its stability under rainfall conditions, considering the fissures, the finite element numerical simulation of saturated unsaturated seepage in expansive soil slope under rainfall is carried out, obtaining the time and space distribution of pore water pressure and transient saturation area. Then
more » ... ion area. Then import the analysis results into FLAC3D software which based on the finite difference method, finally assignment of physical and mechanical parameters in saturated unsaturated, this achieves stability analysis under the presence of fissures, and also reflects the water softening influence on the stability of expansive soil slope. Through the example analysis shows that, the existence of fissures in expansive soil slope has remarkable influence the rainfall infiltration and pore water pressure distribution, the numerical simulation study conclusions are consistent with the existing results, it is proved that this method is effective and practical, the research findings have certain reference significance of the analysis of slope stability and its saturated unsaturated seepage.
doi:10.2991/icsmme-15.2015.24 fatcat:dw3kwltxj5em5d2go6xwmciy7e