水利水电技术2017，Vol.48Issue(2)：138-142,5.DOI:10.13928/j.cnki.wrahe.2017.02.023
裂隙和土体软化效应双重影响下膨胀土边坡的稳定性分析
Analysis on stability of expansive soil slope under dual impact from fissure and soil mass softening effect
摘要
Abstract
Natural expansive soil has the properties of over-consolidation and more fissures through long term drying-wetting cycles and repeated swelling and shrinking.The impact from the common effect of both the properties mentioned above on the slope stability must be considered in the analysis of expansive soil slope stability.A stability analysis on the expansive soil slope under the common impact from different locations of fissure-planes and soil mass softening effect is made with the bilinear strain-hardening/softening ubiquitous-joint model in FLAC3D.The result shows that the stability of the expansive soil slope can be significantly lowered by the existence of fissure-plane.Along with the decrease of the included angle between the fissure-plane and the horizontal positive direction,the safety coefficient of the slope shows a wave-relationship of up-down-up-down-up,while the peak safety coefficients appear at 20° and 115° and the valley safety coefficients appear at 80° and 160°.The slope stability is considered to be further lowered under the dual impact from both the location of the fissure-plane and the soil mass softening effect,in which the soil mass softening effect on the slope stability is less than that from the fissure-plane.Moreover,the reversed inclined fissure-plane with small inclined angle can enhance the whole stability of the slope to a certain extent,which is closely correlated to the strength parameter and the soil mass softening effect of the fissure-plane.关键词
膨胀土/裂隙/软化/稳定性/FLAG3DKey words
expansive soil/fissure/softening/stability/FLAC3D分类
土木建筑引用本文复制引用
杨小明,张理平,吴珺华,朱海琴,张鸿,旷聿函..裂隙和土体软化效应双重影响下膨胀土边坡的稳定性分析[J].水利水电技术,2017,48(2):138-142,5.基金项目
国家自然科学基金项目(51408291) （51408291）
江西省科技厅重点研发计划项目(20151BBG70060) （20151BBG70060）
江西省交通运输厅重点科技项目(2013C0006,2013C0009,2013C00010,2013C00013) （2013C0006,2013C0009,2013C00010,2013C00013）
