Influence And Analysis Of Anti-slide Pile And Slope Parameters On The Stability Of Mudstone Slope

By combining theoretical analysis and numerical simulation,the urumqi university slope stability was analyzed by using ABAQUS finite element software.The effects of anti-slide pile and slope parameters on slope stability were studied.The stability and reinforcement analysis of slope under different working conditions were discussed.(1)The width of the cross section of the anti-slide pile has the greatest influence on the safety factor while the anchorage depth of the anti-slide pile has the least influence.The influencing order is:the width of pile section>pile spacing>anchorage depth,and the optimal pile layout scheme is obtained.The safety factor decreases gradually with the increase of pile spacing.With the increase of cross section width of anti-slide pile,the safety factor keeps increasing.The change of anchorage depth has little influence on the safety coefficient of university roadside slope.When the anti-slide pile is set at the central position of the slope(S=58.5),the stability safety coefficient reaches the maximum.(2)In the natural,rainfall and seismic conditions,the influence of side slope Angle on safety coefficient is gradually decreased with the increase of slope Angle.Slope Angle has great influence on the safety factor of slope.The overall trend of the slope safety coefficient is:at different slope angles,the safety coefficient decreases with the increase of the slope thickness.(3)Under different rainfall conditions,the stability of highly weathered mudstone slope decreases slowly first and then sharply with the increase of water content of highly weathered mudstone.The moisture content of 9.1%is the critical point for the stability change of highly weathered mudstone slope,that is,from basic stability to less stability,and the sliding zone begins to soften.When the water content is higher than 9.1%and closer to 11.5%,the calcareous and argillaceous cement of highly weathered mudstone slip zone is broken by water and the slope is unstable.Under the conditions of different basic seismic intensity,with the increase of seismic horizontal acceleration,the slope stability coefficient is gradually decreasing,and it starts to show a linear downward trend.(4)After the anti-slide pile reinforcement,the highly weathered mudstone of the slope is in a stable state with a safety coefficient of 1.51 under the rainfall condition with a saturated moisture content of 11.5%.Under seismic conditions,when strongly weathered mudstone moisture content is natural(3.5%),the slope stability safety coefficient is 1.25,and the slope is in a stable state.When the strongly weathered mudstone of the slope reaches the saturation moisture content,and under the condition of 8 degree basic seismic intensity,the stability safety coefficient of the slope is 1.11.