One-dimensional consolidation analysis considering exponential flow and self-weight based on continuous drainage boundary

被引：0

作者：

Zong M. ^{[1
]}

Ye C. ^{[1
]}

Liang R. ^{[1
,2
,3
]}

Mei G. ^{[1
,2
,3
]}

Yang X. ^{[1
]}

Wu W. ^{[1
,2
,3
]}

机构：

[1] Faculty of Engineering, China University of Geosciences, Wuhan

[2] College of Civil Engineering and Architecture, Guangxi University, Nanning

[3] Key Laboratory of Disaster Prevention and Structural Safety, Ministry of Education, Guangxi University, Nanning

来源：

Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2021年 / 52卷 / 10期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Continuous drainage boundary; Exponential flow; One-dimensional consolidation; Self-weight; Time-dependent loading;

D O I：

10.11817/j.issn.1672-7207.2021.10.024

中图分类号：

学科分类号：

摘要：

Based on the continuous drainage boundary condition under time-dependent loading, the problem of one-dimensional consolidation of saturated soil considering self-weight and exponential flow with time-dependent loading was studied. The numerical solution was obtained by using finite difference method and its correctness was verified by comparing it with the existing solutions. Based on the present solution, the consolidation behavior of soil was detailedly analyzed by adjusting the interface parameter, the exponential flow parameters, self-weight and time-dependent loading. The results show that, the larger the interface parameter value, the faster the soil consolidation, and the solution with continuous drainage boundary is closer to the solution with Terzaghi drainage boundary. The soil consolidation rate increases with the increase of the self-weight coefficient or the ratio of the equivalent head of external loading to the soil thickness (qh). The self-weight coefficient mainly affects the early stage of soil consolidation, while the value of qh mainly affects the middle and later stages of soil consolidation. In engineering, when the external loading increases slowly, the consolidation drainage boundary is designed according to the continuous drainage boundary, which can not only save materials, but also achieve the effect of complete drainage design. In addition, compared with the Terzaghi boundary, the difference between the solution considering exponential flow and the solution considering Darcy flow is smaller with continuous drainage boundary. © 2021, Central South University Press. All right reserved.

引用

页码：3613 / 3622

页数：9

共 24 条

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