Study on dynamic stability of grillage flexible slope supporting structure with prestressed anchors under rainfall infiltration

Abstract

Many slope stability studies have indicated that the rainfall infiltration can reduce the stability of slope, and its mechanism has gradually become clear. However, there is little study about the dynamic stability of grillage flexible supporting structure with prestressed anchors under rainfall infiltration. Taking the soil volume water content as control variable, the calculation model of soil transient state volume water content considering rainfall infiltration is established. Based on the strength theory of unsaturated soil and the simple circular sliding slice method, the dynamic analysis model for the stability of grillage flexible supporting structure with prestressed anchors is founded, in which the influence of rainfall infiltration is considered. Then the corresponding computational program is written with the program MATLAB. The project example indicates that the stability of unsaturated loess slope supported by grillage flexible supporting structure with prestressed anchors considering rainfall infiltration is obvious duty. When rainfall is frequent and rainfall intensity is heavy in loess region, in the design of slope engineering, the effect of the change of water content caused by rainfall infiltration on the whole stability of grillage flexible supporting structure with prestressed anchors should be taken into account. The stability safety factor should be enhanced. Especially the design of the top of supporting structure should be attached enough importance in order to prevent the shallow slide failure of slope under heavy rainfall.