The Numerical Simulation Of Sliding About Contact Surface Between Loess And Mudstone In Inner Mongolia Autonomous Region

Loess landslide is of great harm, which causes a large number of casualties andproperty losses every year. Mechanism and stability of loess landslide are importantresearch topics. If the research results can be used to guide construction, landslideprotection and reduction in disasters of landslide is significant.In this paper, research is based on loess located in QingShuiHeXian Inner Mongoliaautonomous region and analysis in interface of loess-mudstone sliding mechanism is alsostudied to control and prevent engineering accidents. Research methods mainly utilizeFLAC2D numerical simulation and indoor experiments. The basic physical parameters ofloess are determined through experiment and FLAC2D software is used to calculate theslopes from three aspects for stabilities of slope. First of all, simulations are done only bychanging the angle of slope, second the intensity of rainfall changes with which the angleof the slope is constant, finally situations of the human activities or natural damage aresimulated (such as digging slope toe, stacking at surface of the slope, fissures of slopesurface, etc). And through horizontal displacement, shear strain, shear stress, normal stress,pore pressure and developmental parameters of plastic zone are used to analyse reasonswhich lead to landslide of mechanism. In the engineering protection, protective measuressuch as the retaining wall and anchor cable are applied. Digging toe of25degrees slope issimulated, and horizontal displacement is analyzed through the influence of rainfall. All ofthe work achieves good effects.