Stability of the Rock Mass Reserved in front of Anti-slide Piles

Abstract

To study the stability evaluation method and failure mode of reserved rock masses, the Yueyang landslide project was taken as the research object. First, based on the limit equilibrium method and elastic mechanics, the formulas for calculating the stability of a reserved rock mass were analyzed. Second, the failure modes of the reserved rock mass were tested by the experiment model. The results show that the failure modes of the reserved rock mass can be divided into three modes: upward sliding failure, downward sliding failure and tensile crack failure, which are mainly related to the strength and width of the reserved rock mass. Therefore, it is unreasonable to regard a reserved rock mass as a unified failure form in the design of anti-slide pile reinforcement. In addition, although both moderate-strength and strong-strength reserved rock masses exhibit tensile crack failure, moderate-strength rock masses under triangular loading are prone to tension-sliding failure, while strong-strength rock masses under parabolic loading are prone to tension-overturning failure. Finally, the displacement and stress monitoring results in the experiment are basically consistent with the theoretical analysis, indicating that the theoretical analysis results have high reliability. Landslide treatmentAnti-slide pile reinforcement Reserved rock Sliding failure Factor of safety

Shear performance and reinforcement mechanism of MICP-treated single fractured sandstone

“…Therefore, the reinforcement and treatment of the fractured rock mass is a necessary means to prevent the occurrence of disasters. At present, the main prevention methods mainly include bolt reinforcement (Zhu et al, 2018), prestressed anchor cable reinforcement (Jiang et al, 2019), chemical grouting reinforcement (Benmokrane et al, 1996), and anti-sliding pile reinforcement (Zhu et al, 2021). These reinforcement measures can improve the mechanical properties of fractured rock mass to a certain extent and reduce the possibility of disasters.…”