台风暴雨下某建筑边坡稳定性分析研究

Stability Analysis of a Building Slope under Typhoon and Rainstorm

福建省由于独特的地理和气候条件,经常遭遇台风暴雨,导致滑坡灾害频发。基于强度折减理论,采用FLAC^(3D)软件,对福建龙岩市受2023年9月台风“海葵”中影响的某建筑边坡进行稳定性分析。考虑自重和台风暴雨2种工况,分析边坡的变形破坏机理。结果表明,在自重条件下边坡安全系数为1.676,处于稳定状态;台风暴雨后,安全系数下降至1.230,低于规范值,显示出失稳破坏的风险。台风季节的滑坡风险显著增加,边坡截面中塑性贯通破坏区域约5.0 m^(2),与实际滑坡面积相比误差为11.1%,为极端天气条件下的边坡稳定性评估提供了重要参考。

Due to its unique geographical and climatic conditions,Fujian Province often encounters typhoons and rainstorms,resulting in frequent landslide disasters.Based on the strength reduction theory,FLAC^(3D) software is used to analyze the stability of a building slope affected by Typhoon Haikui in September 2023 in Longyan City,Fujian Province.The results show that the safety factor of slope is 1.676 under the condition of self-weight,which is stable.After the typhoon rainstorm,the safety factor dropped to 1.230,below the norm value,indicating the risk of instability and damage.Landslide risk increases significantly during typhoon season.The plastic through failure area of slope section is about 5.0 m^(2),and the error is 11.1%of compared with the actual landslide area,which provides an important reference for slope stability assessment under extreme weather conditions.