摘要
采用的试验材料是南京市西南长江下游的江心洲洲头的自然产生的淤泥,对水泥掺量的淤泥进行了固化处理,通过一步流动法试验获得固化淤泥的持水特征曲线和非饱和渗透系数.并通过压汞试验分析各因素对固化淤泥孔径分布的影响,从而分析各因素对固化淤泥渗透性的影响.试验表明:水泥掺量增加,使得固化淤泥中的大孔隙数量减少,小孔隙数量增加;同一基质吸力下,固化淤泥的非饱和渗透系数随着水泥掺量的增加而减小.
We used the silt as the dredged material in the central bar of Yangtze river in the southwest of Nanjing in this study. Conducting the different cement content of silt in the curing process,the unsaturated permeability coefficient of dredged material were obtained by one-step outflow method. Mercury injection experiment were done to analysis the pore distribution and penetration of solidified mud. The experiments demonstrated that under the same matrix suction,the unsaturated permeability coefficient of solidified mud decreased with the increase of cement content. Less macro-pores and more micro-pores were found in cement-treated samples with higher cement content.
作者
郭洪喜
赵仲辉
张亚灿
乔兵
江超
Guo Hongxi;Zhao Zhonghui;Zhang Yacan;Qiao Bing;Jiang Chao(Geotechnical Research Institute,Hohai University,Nanjing 210098,China;Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Hohai University,Nanjing 210098,China;Zhongtian Construction Group Co. Ltd.,Shanghai 201100,China)
出处
《河南科学》
2017年第1期111-115,共5页
Henan Science
基金
国家自然科学基金资助(51178161)
关键词
疏浚淤泥
非饱和土渗透
水泥固化
孔隙尺寸分布
dredging silt
unsaturated soil permeability
cement solidification
core size distribution
