上川岛三沙公路长湾段滑坡稳定性分析  

Stability Analysis of Landslide in Changwan Section of Sansha Highway in Shangchuan Island

作　　者：吴畅 WU Chang(Guangzhou Engineering Investigation&Survey Co.,Ltd.)

机构地区：[1]建材广州工程勘测院有限公司

出　　处：《广东建材》2025年第3期116-121,共6页Guangdong Building Materials

摘　　要：在对上川岛三沙公路长湾段滑坡的地质地貌、变形破坏进行深入调查的基础上,对滑坡的成因机理进行了分析得出结论:由于修建公路的人工开挖使得坡体的临空面高度和坡度的增大是滑坡产生的直接诱发因素,也是决定性因素,而长期的暴雨和降雨是主要的诱发因素。根据滑坡的地质环境条件,采用极限平衡法和数值模拟结合的方法对滑坡稳定性和变形破坏特征进行了计算和验证,结果表明,该滑坡目前处于欠稳定状态,在暴雨的情况下为不稳定状态,而数值模拟结果重现了滑坡的应力应变场特征、变形破坏特点和发展趋势。Based on the investigation of the geological environment characteristics and deformation and failure of the landslide in the Changwan section of the Sansha Highway in Shangchuan Island.The genetic mechanism of the landslide was analyzed.The limit equilibrium method and numerical simulation were used to calculate and verify the stability and deformation and failure characteristics of the landslide.The decisive factor of landslide is the increase of slope free face and slope caused by artificial excavation and construction of highway,and long-term rainstorm and rainfall are the main inducing factors.The calculation results show that the landslide is currently in an unstable state,and it is unstable in the case of heavy rain.The numerical simulation results reproduce the stressstrain field characteristics,deformation and failure characteristics and development trend of the landslide.

关 键 词：滑坡 极限平衡法 数值模拟 稳定性 应力应变 

分 类 号：P642.22[天文地球—工程地质学] U418.55[天文地球—地质矿产勘探]