三峡大学学报（自然科学版）2024，Vol.46Issue(1)：30-35,6.DOI:10.13393/j.cnki.issn.1672-948X.2024.01.005
降雨-蒸发作用下土石坝渗流场及坝坡稳定性研究
Study on Seepage Field and Slope Stability of Earth-Rock Dam Under Rainfall-Evaporation
摘要
Abstract
In order to explore the influence of rainfall-evaporation on the seepage field and stability of unsaturated soil dam slope,the Geo-studio software was used to analyze the variation of pore water pressure and safety factor of a reservoir dam slope in South China under different rainfall types and boundary conditions.The results show that under the same rainfall level,the rising rate of pore water pressure increases with increasing rainfall type,decreases with the decreasing rainfall type,and first increases and then decreases with the concentrated rainfall type.The decreasing rate of stability safety factor is corresponding to the rising rate of pore water pressure.Under the same rainfall time,the variation range of pore water pressure and stability safety factor in descending order is:decreasing type＞concentrated type＞increasing type.Under the condition of rainfall and evaporation,the decrease rate of safety factor of decreasing rainfall type is the largest,which is the most unfavorable to the stability of dam slope.Under the boundary condition of land climate interaction,the growth rate of pore water pressure and the reduction rate of safety factor of each rainfall type are smaller than those of the unit flow boundary condition,but the safety factor is larger than that of the unit flow boundary condition.The seepage field and stability changes reflected under rainfall-evaporation are more in line with reality.关键词
降雨-蒸发作用/降雨类型/边界条件/孔隙水压力/安全系数Key words
rainfall-evaporation/rainfall type/boundary condition/pore water pressure/safety factor分类
建筑与水利引用本文复制引用
吴凡,王从锋,王云峰..降雨-蒸发作用下土石坝渗流场及坝坡稳定性研究[J].三峡大学学报（自然科学版）,2024,46(1):30-35,6.基金项目
国家自然科学基金项目(52079074) （52079074）
