New simplified stability analysis method of structuralized cemented slopes

Abstract

In recent years, structuralized cementation method has become a novel and promising method for reinforcement of coarse-grained soil slope, which has been proved by practical application. Nevertheless, structuralized cemented slopes with gradient material properties cannot be analyzed using the current methods. The structuralized cemented slope is divided into pure soil zone, variation zone, and solidification zone. The constitutive models of cemented soil in the three zones are proposed, respectively. Slip surfaces of structuralized cemented slopes are all assumed as circular arc shape. It is proved that the displacement compatibility rule is valid for the structuralized cemented slope. A new simple approach is proposed through extension of simplified Bishop slice approach for analyzing structuralized cemented slope stability degree with different cement distribution under various conditions. Our proposed approach involves few parameters examined by element tests. Through analyzing structuralized cemented slopes based on vertical loading and excavation conditions, our proposed method is validated, showing agreement with centrifuge model test analysis. Application of this approach to an actual slope based on excavation conditions reveals that an expanded solidification zone enhances slope safety and reduces shear deformation. Stability remains relatively constant once the solidification zone reaches a certain size. This result underscores the practical value of the proposed method in predicting and optimizing the stability of structuralized cemented slopes.