摘要
以黑龙江省松花江干流堤防采用高液限黏土作为筑堤材料为工程背景,在高液限黏土中按一定比例综合掺加细砂、水泥、石灰和粉煤灰等材料,通过直剪试验和渗透试验研究了3种配比固化土用于堤防填筑的改良效果.结果表明:固化土的黏聚力、内摩擦角和抗剪强度均明显优于素土;固化土的渗透系数均随压实度的增大而减小,但不同压实度范围内的固化土表现出不同的抗渗性能;养护龄期达到7 d后,增加养护龄期对减小渗透系数没有明显作用.
The modified high liquid limit clay was used as levee filling materials in Songhua River main stream of Heilongjiang Province. Fine sand, cement, lime and fly ash were subjected to the clay with different ratios. Then the modified clay was studied to determine the engineering performance using direct shear test and penetration test. The results show that the cohesion, internal friction angle and shear strength of modified clay are obviously superior to that of the original clay. The permeability coefficient of the modified clay decreases with an increase of compaction degree, whereas the modified clay has different impermeability for various ranges of compaction degrees. After 7 d curing age, the permeability of modified clay keeps unchanged basically with curing age.
作者
赵英爱
王远明
吴天前
朱盛
ZHAO Ying’ai;WANG Yuanming;WU Tianqian;ZHU Sheng(School of Civil and Architectural Engineering,Wuhan University,Wuhan 430072,China;Sanjiang Engineering Construction Administration Bureau of Heilongjiang Province,Harbin 150006,China)
出处
《武汉大学学报（工学版）》
CAS
CSCD
北大核心
2019年第7期581-586,共6页
Engineering Journal of Wuhan University
基金
湖北省自然科学基金资助项目(编号:2016CFB115)
黑龙江省三江工程建设管理局科研项目(编号:SGZL/KY-15)
关键词
高液限黏土
堤防
固化土
抗剪强度
渗透系数
high liquid limit clay
levee
modified clay
shear strength
permeability coefficient
