钻探工程2024，Vol.51Issue(4)：101-110,10.DOI:10.12143/j.ztgc.2024.04.013
降雨条件下湖南省红层地区浅层土坡失稳机理研究
Study on instability mechanism of shallow soil slopes in the red beds of Hunan Province under rainfall conditions
摘要
Abstract
Red beds are typically considered as"prone-to-slide strata",and shallow soil landslides can easily occur under rainy conditions.Therefore,it is of great importance to study the stability of shallow soil slopes in red bed areas under rainfall conditions.In this research,the shallow soil slopes in the red bed areas of Hunan Province is taken as an example,the stability of shallow soil slopes in red bed areas under different slope gradients,rainfall intensities,saturated hydraulic conductivities,and initial water contents is investigated by employing the modified Green-Ampt infiltration model,the specific impact patterns of these factors on slope stability is also analyzed.When the slope gradient is less than 45°,the safety factor decreases as the slope increases;when the slope gradient is greater than 60°,the safety factor increases with the slope.The wetting front depth changes insignificantly with the rainfall intensity,and the safety factor changes insignificantly with the rainfall intensity;the depth of the wetting front increases and the safety factor of the slope decreases as the saturated hydraulic conductivity increases;the safety factor decreases as the initial water content increase.The results can provide a theoretical basis and practical guidance for slope protection engineering in red bed areas.关键词
红层/土质边坡/边坡稳定性/降雨入渗/修正Green-Ampt模型Key words
red bed/soil slope/slope stability/rainfall infiltration/modified Green-Ampt model分类
天文与地球科学引用本文复制引用
姚腾飞,徐跃冰,韩函,王璨..降雨条件下湖南省红层地区浅层土坡失稳机理研究[J].钻探工程,2024,51(4):101-110,10.基金项目
湖南省地质院科研项目"湖南省典型地质背景区地质灾害成灾模式及致灾因素评价体系研究"(编号:HNGSTP202202) （编号:HNGSTP202202）
