江淮水利科技Issue(6)：1-6,12,7.DOI:10.20011/j.cnki.JHWR.202306001
干湿循环作用下黏性土堤坝裂缝形成机制研究
Study on the mechanism of crack formation in cohesive clay embankments under Dry-Wet cycling effects
摘要
Abstract
Dry-wet(D-W)cycle is one of the vital factors that contribute to the generation of cracks in cohesive soil.The morphology and depth of cracks are the main factors influencing the stability of embankments.Based on laboratory experiments and theoretical research,this paper explored the mor-phology and depth of cracks in cohesive soil under D-W cycle effects.Furthermore,it investigated and discussed how D-W cycling influences the mechanism of crack formation.The results showed that during the drying process,the matric suction of cohesive soil increased,causing the soil to transition gradually from a saturated state to an unsaturated state.The matric suction of cohesive soil was greatly influenced by the soil moisture content.During the desiccation process,significant tensile stress was generated,and when the moisture content of the unsaturated soil reached a critical value,it led to soil cracking.The study also showed that D-W cycle led to the formation of grid-like cracks in cohesive soil embankments.The depth of the crack zone was deeper at the crest of the embankment and shallower at the bottom.The influence of D-W cycle on the depth of cracks was a dynamic process,primarily influenced by climate change and the depth of groundwater burial.There was an approximate linear relationship between crack depth and groundwater depth in embankments.关键词
干湿循环/堤坝/裂缝/非饱和土Key words
D-W cycles/embankment/crack/unsaturated soil分类
建筑与水利引用本文复制引用
王理想..干湿循环作用下黏性土堤坝裂缝形成机制研究[J].江淮水利科技,2023,(6):1-6,12,7.基金项目
安徽省自然科学基金水科学联合基金项目(2208085US01) （2208085US01）
