Influence of salt in site soils on permeability and pore diameter

被引：6

作者：

Chen W. ^{[1
,2
]}

Lü H. ^{[1
,2
]}

Wu G. ^{[3
]}

Zhang J. ^{[1
,2
]}

机构：

[1] Key Laboratory of Mechanics on Disaster and Environment in Western China, Ministry of Education, Lanzhou University, Lanzhou

[2] School of Civil Engineering and Mechanics, Lanzhou University, Lanzhou

[3] Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering, Gansu Province, Lanzhou University of Technology, Lanzhou

来源：

Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2016年 / 47卷 / 08期

关键词：

Mercury injection test; Particular salts; Permeability; Pore structure; Soil of sites;

D O I：

10.11817/j.issn.1672-7207.2016.08.028

中图分类号：

学科分类号：

摘要：

In order to explore the influence of salt content on permeability in site soils, based on the laboratory water saturated permeability test, with the addition of two soluble salts with the gradient of 0.2%(mass fraction) of NaCl and Na2SO4 in the desalination soil, the change of permeability coefficient in the soils with particular content and category saline was tested. At the same time, the internal pore structure of salt samples by mercury injection test was tested in order to conform the results of permeability test from the microscopic. The results show that the permeability coefficient of salt samples decreases with the increase of salt content and the both accord with good negative exponential correlation. The pore size distribution curve of salt samples gradually shifted to the left with the increase of salt content. The peaks of the pore size distribution curve present the form of index decreasing with the increase of salt content, corresponding to penetration test results. The internal pore structure of salt samples is directly related to its permeability, and the existence of salt has the effect of a certain degree of congestion and filling to the internal pore structure, affecting the permeability of soils. © 2016, Central South University Press. All right reserved.

引用

页码：2747 / 2751

页数：4

共 17 条

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