中南大学学报（自然科学版）2011，Vol.42Issue(3)：765-771,7.
降雨入渗对粗粒土路堤变形与稳定性的影响
Effect of rainfall infiltration on additional settlement and stability debasement of granular soil fillings embankment
摘要
Abstract
The rainfall infiltration mechanism analysis for the granular soil embankment was executed, and the metric suction and shearing strength was generalized when the grain diameter were fixed. The law for granular soil's metric suction and shearing strength attenuation was obtained and the rainfall infiltration depth calculation formulas were discussed. According to unsaturated soil's strength attenuation law, the strength discount method was used for the rainfall infiltration effects simulation, and the embankment additional settlement and stability debasement resulting from rainfall infiltration was stimulated by the embankment numerical computation model. The computation results show that rainfall infiltration has effect on the embankment additional settlement, and the additional settlement increases with the increase of the infiltration depth incensement. While the first time infiltration depth reaches 2 m, the additional settlement can reach 1.30 cm. The embankment stability is obviously affected by rainfall infiltration, which expands the plastic zones in the embankment numerical model and thus reduces the stability coefficient.关键词
降雨入渗/入渗深度/附加变形/路堤稳定性/粗粒土分类
建筑与水利引用本文复制引用
陈晓斌,徐望国,刘小平..降雨入渗对粗粒土路堤变形与稳定性的影响[J].中南大学学报（自然科学版）,2011,42(3):765-771,7.基金项目
国家自然科学基金资助项目(50908233) （50908233）
中国博士后科学基金资助项目(20080440996) （20080440996）
