水力发电2024，Vol.50Issue(7)：31-37,7.
不同降雨类型循环下二元边坡渗流场及稳定性分析
Analysis of Seepage Field and Stability of Binary Slope under Different Rain Type Cycles
摘要
Abstract
In order to study the impact of different rainfall conditions on binary slopes,taking a highway slope project in Fujian as the study object,based on the saturated-unsaturated seepage theory,the Geo-Studio software is used to simulate the effects of different types of rainfall on the seepage field and stability of binary slopes,for studying the changes in seepage field and safety factor of binary slopes under different rain pattern circulation conditions.The research results show that,(a)there are significant differences in pore water pressure change caused by rainfall between the surface soil and internal rock layers of the slope,and there is a potential sliding surface at the soil-rock contact surface;(b)when the total rainfall is the same,the change curve of pore water pressure of the surface soil is convex in the early stage,linear in the middle stage and uniform type,and concave in the later stage;(c)the pore water pressure curves at the top and surface of the lower rock layer remain unchanged in the early stage of rainfall cycle,and suddenly increase to the saturated state in the later stage of the cycle,and the change trend of pore water pressure in the rock layer at slope foot is consistent with that of the surface soil;(d)the change of safety factor is consistent with the rainfall time distribution and has obvious hysteresis;and(e)when the rainfall is the most unfavorable,the potential sliding surface moves upward from the inside of slope to the soil-rock contact surface and the internal rock layer contact surface.关键词
降雨入渗/二元边坡/稳定性分析/饱和-非饱和渗流/潜在滑动面/安全系数Key words
rainfall infiltration/binary slope/stability analysis/saturated-unsaturated seepage/potential sliding surface/safety factor分类
建筑与水利引用本文复制引用
查文华,杨晗,许涛,赵志豪,黄仁贵..不同降雨类型循环下二元边坡渗流场及稳定性分析[J].水力发电,2024,50(7):31-37,7.基金项目
2023年江西省研究生创新专项资金项目(YC2023-S588) （YC2023-S588）
