降雨型土质边坡稳定性三因素图谱评价方法研究

Study on evaluation method of three-factor atlas for stability of rain-type soil slope

降雨是边坡工程易发环境中一个重要的触发因素。以安溪县某边坡为例,采用有限元法和强度折减法相结合的方法,综合分析降雨强度、持续时间和边坡稳定性安全系数三因素之间的关系,建立三者之间的三维关系数据图谱。通过三维数据图谱,直观表达了降雨强度、持续时间和安全因素之间的复杂关系,为边坡稳定性分析提供了新的视角和理解。结果表明:降雨强度和持续时间,对边坡安全系数和边坡变形有显著影响。建立降雨强度和持续时间的多因子三维图谱,由安全系数划分出边坡在不同降雨工况下的评价等级,更直观地表达了数据之间的变化趋势和交互特征。

Rainfall is an important trigger factor in the prone environment of slope engineering.Taking a slope in Anxi County as an example,this paper comprehensively analyzes the relationship between rainfall intensity,duration and safety factor of slope stability by using finite element method and strength reduction method.The complex relationship between rainfall intensity,duration and safety factors is intuitively expressed through 3D data atlas,which provides a new perspective and understanding for slope stability analysis.The results show that:rainfall intensity and duration have significant effects on slope safety factor and slope deformation.The multi-factor three-dimensional map of rainfall intensity and duration was established,and the evaluation grade of slope under different rainfall conditions was divided by the safety factor,which more intuitively expressed the changing trend and interaction characteristics between the data.