Stability Analysis Of Dump In Slope Under Rainfall

In Guang-zhong Sun wrote his book "Chinese typical landslide" lists more than 90 landslide as an example, more than 90% of landslide and rainfall have close relationship. Rainfall is a major factor in hair slope instability, the majority of slope failure was mainly due to landslides caused by rainfall infiltration, the main failure mechanism is aggravated due to the rains led to the slope and slope matrix suction decreased, resulting skid force is less than sliding force. In this paper, based on Kunyang Phosphate Dump Slope for the study, using the Geo-Studio software to simulate the stability of different intensities of rainfall dump slope. This paper mainly studies the following aspects:(1)Researched on different permeability coefficient of dump slope in the process of rainfall, slope table change laws of pore water pressure and volumetric water content; researched on rainfall process and rain stop phase, the rainwater seepage law in the process of slope infiltration.(2)Used the SEEP/W and SLOPE/W of GEO-Studio software module to calculate the dump slope stability under different rainfall conditions by calculated limit equilibrium method.(3)Used the SEEP/W and SLOPE/W of GEO-Studio software module to calculate the dump slope failure probability under different rainfall conditions by Monte Carlo method.(4)Used sensitivity analysis principle study Dump deposits of bulk density, cohesion and internal friction angle of impact factor of safety.