中国工程科学Issue(2)：73-78,6.
掺砂率及初始干密度对改良膨胀土无荷膨胀率影响研究
Experimental research on the mixed sand ratio and initial dry density of weathered sand improved expansive soil free load swelling rate
摘要
Abstract
Through the indoor free load swelling rate test,Yichang City,a section of a high-way reconstruction project of expansive soil were studied. Key analysis free load swelling rate of a non-load time,the proportion of mixed sand,the relationship between the initial dry densi-ty,experimental studies have shown that:Free load swelling rate is mainly divided into rapid expansion,slow expansion and eventually stabilize in three stages;during the initial dry densi-ty is constant,weathered sand soil free load swelling rate will increase the proportion of sand mixed with the rapid decrease slowly after the first lower,weathered sand soil modified free load swelling rate is not sensitive to the amount of sand mixed;in the same mixed sand ratio, weathered sand soil free load swelling rate increases with increasing initial dry density increases rapidly between them have a good linear correlation,expansive soil subgrade construction in progress when control of the initial dry density,to help reduce its swelling deformation,ensur-ing the stability of embankment.关键词
膨胀土/风化砂/初始干密度/掺砂比例/无荷膨胀率Key words
expansive soils/weathered sand/initial dry density/mixing sand ratio/free load swelling rate分类
建筑与水利引用本文复制引用
杨俊,杨志,张国栋,唐云伟,陈红萍..掺砂率及初始干密度对改良膨胀土无荷膨胀率影响研究[J].中国工程科学,2014,(2):73-78,6.基金项目
湖北省教育厅自然科学研究重点项目 （）
