Intelligent monitoring, stability evaluation, and landslide treatment of a carbonaceous mudstone and shale slope in guangxi, China

Abstract

Carbonaceous mudstone and shale (CMS) slopes are prone to disintegration, instability, and other engineering diseases. This calls for a suitable method to evaluate the slope stability and eliminate the hazards. However, the traditional slope monitoring system is slow in alarm and response, and inaccurate in stability analysis. Based on the BeiDou Navigation Satellite System (BDS), this paper designs a novel automatic monitoring and early warning system. In the system, the limit equilibrium method was combined with the SlopeSR finite-element method that satisfies the inequality relationship to evaluate the slope stability. The reliability of the proposed system was verified through an example analysis on a CMS landslide slope in Guangxi, China. Through field survey on the slope, the geological conditions of the slope were identified, so were the features of slip mass, slip band, and slip bed. Finally, the comprehensive treatment plan was designed for the slope. The results show that: (1) Under natural condition, the slope is temporarily stable. If heavy rainfall occurs in the study area, the slope is very likely to slide on a large scale. (2) The maximum residual sliding force of A main-A main' section was 54.861kN/m. The calculated displacement meets the development trend of the landslide slope, as evidenced by the results of SlopeSR finite-element simulation. (3) The CMS slope became safe and stable after being fortified with anchor-cable lattice beam + anti-slide pile + gravity concrete retaining wall + drainage measures + monitoring measures.