The Influence Of Slope Morphology On Slope Stability

A large number of field survey statistics show that the intersection of the convex slope and the main ditch and the supporting trench in loess area is more prone to landslide.In order to study the relationship between the stability of the slope and slope of hill in this article,through numerical simulation,model test and theoretical analysis,studied the stability of the slope under the different horizontal curvature and the longitudinal curvature conditions,through the analysis of slope in the plastic zone distribution of the conditions of different curvature,the characteristics of stress strain distribution,the maximum displacement size,slope surface curvature were analyzed on how to affect the slope stability.This paper mainly obtained the following results:(1)Lateral slope curvature and longitudinal curvature was presented in this paper,and a method for determining the side slope according to the cut slope cutting entrance,export and the minimum radius of circular arc formation(R_S)with the corresponding distance(L_S)cut into the cut export ratio to determine the longitudinal curvature(?_S);Based on the boundary of the ramp and the minimum radius of the circular arc on the slope of the slope and the radius of circular arc formation(R_L),the ratio of the distance between the sides of the slope(L_L)is determined to determine the curvature of the curvature(?_L).(2)Based on statistical analysis of slope characteristics in loess area,a numerical model was established using Flac3D software.The model slope is 120m,and the slope is 37.The boundary ranges from the top of the slope to the left edge of 300m,the slope to the right end of the 400m,and the total height of the model is 220m.(3)The relationship between longitudinal curvature and stability of slope shows that the longitudinal curvature is from-1.33 to 0,and the number of damage units is increasing,and the position of damage is gradually changed from slope shoulder to whole slope.The maximum shear strain shows a step-down,the slope slope is close to the straight slope,the maximum shear strain fluctuates as the curvature increases.The longitudinal curvature ranges from 0 to 1.33,and the number of units that damage the slope decreases,and the location of the damage is changed from the whole slope to the lower part of the slope.The maximum shear strain rises with the steps,and with the increase of curvature,the maximum shear strain rises rapidly and then stays steady.The displacement in the X direction(i.e.,along the slope direction)is the main direction of slope displacement.The displacement value of the X direction is the opposite of the percentage change of the total displacement.The larger the displacement value in the X direction,the smaller the percentage of the total displacement.At the same time,the safety coefficient of convex slope is always smaller than that of concave slope.(4)The relation between horizontal curvature and slope stability study showed that as the horizontal curvature change,slope of plastic failure unit increases first,at 0.1,maximum security coefficient,and then fluctuation decreases;while the position of shear strain has no obvious change.The variation trend of slope safety factor,maximum shear strain and maximum displacement was in accordance with the trend of plastic failure unit.