大连理工大学学报Issue(6)：618-624,7.DOI:10.7511/dllgxb201506009
初始含水率对风化砂改良膨胀土有荷膨胀率影响研究
Study of impact of initial water content on loaded expansion ratio of expansive soil improved by weathered sand
摘要
Abstract
Using weathered sand as improved materials, the feasibility of suppressing swelling characteristics of expansive soil and the improvement effects were explored,the impact of weathered sand content on the expansion ratio of expansive soil was studied,and the impacts of different contents of water and weathered sand on the loaded expansion ratio were analyzed.The research results show that the weathered sand can effectively suppress swelling of expansive soils,and with the increasing of the weathered sand dosage,the decreasing magnitude of swelling index is enhanced.At the same initial water content,within 0 to 10% of weathered sand content,the decreasing magnitude of the loaded expansion ratio is the largest.The loaded expansion ratio decreases as exponential function with the increasing of initial water content,and when the initial water content is less than the optimum water content,the loaded expansion ratio decreases obviously with the increasing of the initial water content.When the initial water content is larger than the optimum water content,there is no obvious decreasing of loaded expansion ratio with the increasing of the initial water content. When the initial water content is the same,the larger the overlying loads are,the better the suppressing effect is for loaded expansion mixed with weathered sand.关键词
膨胀土/风化砂/初始含水率/有荷膨胀率Key words
expansive soil/weathered sand/initial water content/loaded expansion ratio分类
建筑与水利引用本文复制引用
杨俊,刘世宜,张国栋,唐云伟,谢支钢..初始含水率对风化砂改良膨胀土有荷膨胀率影响研究[J].大连理工大学学报,2015,(6):618-624,7.基金项目
湖北省教育厅自然科学研究重点项目(D20131304) （D20131304）
