Prevention and Control Measures and Analysis of Bedding Landslides in Marl Slopes in Guilin City

Bedding-parallel landslides in marl slopes in the Guilin area are prone to occur under the combined effects of dip-slope structural conditions, rainfall infiltration, and engineering disturbances, exhibiting significant structural control characteristics and distinct regional engineering geological features. Taking bedding landslides in marl slopes of Guilin as the research object, this study analyzes the fundamental characteristics of marl and the failure features of bedding rock slopes, and further investigates the main controlling factors of landslide formation. The results indicate that the development of weathering-induced fractures, unfavorable dip-slope topographic conditions, continuous rainfall-induced softening, and slope excavation disturbances are the primary factors triggering slope instability. On this basis, commonly used prevention and control measures, including slope cutting and unloading, retaining structures, combined reinforcement, vegetation protection, and drainage systems, are systematically summarized. Furthermore, two treatment schemes—anchor bolt with wire mesh and shotcrete support, and prestressed anchor cable frame beam with vegetation—are proposed based on engineering practice. A comprehensive comparison between the two schemes is conducted in terms of stability, construction conditions, economic efficiency, and ecological compatibility. The results show that Scheme I exhibits better overall stability and long-term support performance, whereas Scheme II has certain advantages in economic efficiency and environmental compatibility. It is suggested that the treatment of bedding landslides in marl slopes in Guilin should follow an integrated approach of “drainage-reinforcement-protection-monitoring”, so as to provide a reference for landslide prevention and control in similar regions.