Stability analysis of high slopes and design of stabilization schemes for blocky slabbed rock bodies

Abstract

Ensuring high slope stability has become a critical technical challenge that threatens construction safety, restricts project progress, and affects safe operation. This research utilizes 3DEC software to establish the slope model, analyze the stability of high slopes with down-layer and anti-dip slab-cracked rock bodies using the discrete element method and strength reduction method, and investigate the influence of each feature of the slab-cracked rock body on the stability of the slab-cracked structure slope. Then, a slope was designed with the reinforcement scheme of “anchor anti-slip pile + prestressed anchor cable + drainage + slope protection” as an example to analyze the effectiveness of slope reinforcement under different anti-slip pile positions and sizes and to verify the effectiveness of the slope reinforcement scheme through the displacement changes of the slope. The results show that the slope safety coefficient is positively correlated with the rock mass, thickness, and strength of the cracked body. The most obvious effect is the rock mass, and the safety coefficients of the two kinds of cracked slopes when the rock mass is the highest are 4.464 and 6.714, respectively. The displacements in the X direction and the Z direction are reduced by 78.04% and 60.34%, respectively, and the reinforced design has played the role of limiting the decline of slopes. To some extent, it can ensure the effectiveness of the slope-reinforced scheme. The design of reinforcement plays an effective role in limiting slope decline, which can provide the stability of the slope to a certain extent.