Stability analysis of loess slope under earthquake
In the Loess Plateau area,soil slope instability caused by earthquakes occurs from time to time,ac-companied by incalculable property losses and casualties,so it is particularly important to analyze the stability of the loess slope under the action of earthquakes.Based on FLAC3D finite element numerical simulation software,this paper analyzes the principle of loess slope failure under earthquake based on the engineering background of the slope in Sanyuan Village,Kaole Township.Based on the homogeneous loess slope model,the changes of horizontal displacement of slopes with elevation and horizontal displacement with different positions of slope surface under earthquake action by different internal friction angles and cohesion were analyzed,and the following conclusions were drawn:(1)At different heights in the same vertical direction inside the soil slope,the elevation has an am-plifying effect on the displacement of the monitoring point,and through the analysis of the horizontal displacement of the monitoring point of the loess slope surface,it is concluded that the displacement of the slope foot is the lar-gest and the most unstable,so when the slope is reinforced and treated,The reinforcement and protection of slope feet should be considered;(2)The horizontal displacement of the loess slope has an amplification effect from left to right in the same horizontal direction,and the amplification effect is more obvious the closer to the slope,so when designing the slope for seismic protection,special attention should be paid to the seismic design of the slope;(3)Based on the shear strain cloud and the soil slope displacement cloud map,it is concluded that the liquefaction of the soil body without considering the action of earthquake mainly occurs in the circular arc—shaped shallow land-slide cut from the foot of the slope.(4)For the Malan loess slope,under the action of earthquake,the maximum displacement of the slope decreases with the increase of internal friction angle and cohesion,and the influence rela-tionship between cohesion and internal friction angle on slope strength is mutual inhibition.
万方数据
维普
