期刊
SPRINGERPLUS
卷 5, 期 -, 页码 -出版社
SPRINGER INTERNATIONAL PUBLISHING AG
DOI: 10.1186/s40064-016-2472-2
关键词
Hydraulic conductivity; Sand; Gradation; Shape
Hydraulic conductivities of sands with different gradation and grain shape were estimated experimentally at a relative density (D-r) of about 40 % and a 22 +/- 2 degrees C of constant temperature. Narli Sand (NS) with 0.67 of sphericity (S) and 0.72 of roundness (R), and Crushed Stone Sand (CSS) with 0.55 of S and 0.15 of R values were artificially graded into sixteen different grain-size fractions (4.75-2,2-1.18, 1.18-0.6, 0.6-0.425, 0.425-0.3, 0.3-0.075, 4.75-0.075,2-0.075, 1.18-0.075, 0.6-0.075, 0.425-0.075, 4.75-0.6, 2- 0.6, 4.75- 0.425, 2- 0.425, 1.18- 0.425 mm). Hydraulic conductivities of the NS estimated by use of constant head test ranged from 1.61 to 0.01 cm/s, whilst those of the CSS estimated by the same test ranged from 2.45 to 0.012 cm/ s. It was observed that the hydraulic conductivity values of the NS are lower than those of the CSS samples, which is likely to be the result of differences in shape, particularly in R values. The results clearly demonstrated that the hydraulic conductivity can be significantly influenced by grading characteristics ( d(10), d(20), d(30), d(50), d(60), c(u), c(C), n, I-O). Furthermore, comparisons between results obtained in the present study and hydraulic conductivity estimated with other formulas available in the literature were made. The comparisons indicated that the best estimation of hydraulic conductivity changes based on the gradation and shape properties of the sands tested.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据