Unsaturated hydraulic conductivity of densely compacted Gaomiaozi bentonite under unconfined conditions

被引：5
|
作者：
Ye W. [1 ,2 ]
Niu W. [1 ]
Chen B. [1 ]
Chen Y. [1 ]
机构：
[1] Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education, Tongji University
[2] United Research Cent. for Urban Environment and Sustainable Development of the Ministry of Education
来源：
Tongji Daxue Xuebao/Journal of Tongji University | 2010年 / 38卷 / 10期
关键词：
GMZ01; bentonite; Transient profile method; Unconfined swelling conditions; Unsaturated permeability;
D O I：
10.3969/j.issn.0253-374x.2010.10.007
中图分类号：
P57 [矿物学];
学科分类号：
070901 ;
摘要：
The unsaturated permeability of compacted Gaomiaozi-bentonite was tested under unconfined conditions on the basis of the instantaneous profile method. Results show that under unconfined conditions, the unsaturated permeability of Gaomiaozi bentonite ranges from 1.0 × 10-12 to 1.0 × 10-15 m · s-1 and groups around 1.0 × 10-14 m · s-1, and the maximum value reaches when the specimen is saturated. Compared to the confined conditions, the unsaturated permeability under confined conditions is lower than that under unconfined conditions, and the shapes of curves between unsaturated permeability and suction under different confining conditions are different. This may because that the swelling mechanism is different under different confining conditions.
引用
收藏
页码：1439 / 1443
页数：4
相关论文
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