Model for tortuosity of soil considering geometric arrangement of particles

被引：0

作者：

Yan H. ^{[1
]}

Teng J.-D. ^{[1
,2
]}

Zhang S. ^{[1
,2
]}

Sheng D.-C. ^{[1
,2
]}

机构：

[1] Department of Geotechnical Engineering, Central South University, Changsha

[2] National Engineering Laboratory for High Speed Railway Construction, Changsha

来源：

Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | 2020年 / 42卷 / 01期

关键词：

Particle arrangement; Permeability; Porosity; Tortuosity;

D O I：

10.11779/CJGE202001023

中图分类号：

学科分类号：

摘要：

Tortuosity is an important parameter in studying the permeability of soil, which reflects the flow path of fluid in soil particles. In literatures, the tortuosity is considered to be solely related to the porosity of soil. However, the expressions for the tortuosity vary greatly in the previous studies. It may be caused by some other unconsidered factors. The physical model for fluid passing through square particles in laminar flow state is established in this study. The results show that the proposed model agrees well with the numerical simulation results and the experimental results in the literatures. Finally, the influences of particle arrangement and distribution on the tortuosity are analyzed, and the value region of the tortuosity is determined. It is concluded that the tortuosity of particles relates to the porosity of soil and the distribution of particles. © 2020, Editorial Office of Chinese Journal of Geotechnical Engineering. All right reserved.

引用

页码：195 / 200

页数：5

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