Treatment measures for complex engineering slope problems based on typical cases

HAN Xiaoyu; ZHANG Wenju; TANG Dong

doi:10.3969/j.issn.1000-1123.2025.22.009

Abstract：Slope support is usually an important part to ensure engineering safety and normal operation.To further study the mechanism,influencing factors,and treatment measures for slope stability problems,this paper analyzes the characteristics and applicable conditions of different treatment measures for engineering slope problems.Taking the Centianhe irrigation project as a case study,it delves into slope problems,including landslides,rock mass fragmentation,cracking,severe weathering,discontinuous deformation,and high-fill erosion.Numerical simulations of a typical cross-section were employed to analyze the impact of excavation and rainfall on slope stability.According to the analysis of mechanical parameters and safety factors under different working conditions(including original state,excavation,excavation with backfilling,and excavation with rainfall),the strength parameters are modified by FLAC3D interpolation,and the strength reduction method is used to calculate the safety factor of excavated slopes.The research shows that in the natural state,the safety factor of the slope is 1.2;the excavation condition and excavation with backfilling condition have little impact on the slope;the excavation with rainfall condition has a significant impact,resulting in a maximum deformation displacement of 16.6 cm and reducing the safety factor to 1.01,which fails to meet the stability requirements.The research results indicate that rainfall is the main cause of landslides.After adopting anchor spray support measures,the safety factor under the most unfavorable condition of excavation combined with rainfall is increased to 1.15,meeting the requirements of the slope design specifications for water conservancy and hydropower projects.Furthermore,the study proposes slope stability treatment measures and optimization strategies,aiming to offer insights for addressing similar engineering challenges.