Abstract:Reinforced earth retaining wall is a widely used construction technique of retaining walls. Because of the rapid increase in traffic loads and the inherent defects associated with such a kind of reinforced earth retaining wall,many of them fail after operation for a period of time in China. A case study is carried out based on a failed reinforced earth retaining wall in overpass along Renmin road,Heze City of Shandong Province. The reasons of failure and its mechanical mechanism have been analyzed through numerical simulation. By comparison of a few reinforcement means,a comprehensive reinforcement scheme is determined,which frames the pressure grouting,the double directions and inclined applied prestressed anchorage,and the shotcrete with the wire mesh reinforcement. The reinforcement effects given by different techniques have been analyzed by using numerical step analysis method. The results indicate that the inclined applied prestressed anchorage restrains the vertical fractures developed in the upper part of the wall and shear band in the foot corners,providing a higher tensile strength,stiffness and a faster increase in resistance velocity as well. Meanwhile,the convex deformation in the side wall has been controlled by the shotcrete. The application of the reinforcement in site achieves the expectation regarding to the monitored results. It proves that the comprehensive reinforcement scheme has an extent value to the similar engineering.