Analytical Solution for One-dimensional Consolidation of Double-layered Soil Under Combined Action of Load and Electro-osmosis

被引：0

作者：

Zong M. ^{[1
,2
]}

Li C. ^{[3
]}

Wu W. ^{[1
,2
,4
]}

Tian Y. ^{[1
,2
]}

Liang R. ^{[1
,2
]}

Mei G. ^{[1
,4
]}

机构：

[1] Faculty of Eng., China Univ. of Geosciences, Wuhan

[2] Zhejiang Inst., China Univ. of Geosciences, Hangzhou

[3] Faculty of Civil Eng. and Mechanics, Jiangsu Univ., Zhenjiang

[4] College of Civil Eng. and Architecture, Guangxi Univ., Nanning

来源：

Gongcheng Kexue Yu Jishu/Advanced Engineering Sciences | 2022年 / 54卷 / 02期

关键词：

Analytical solution; Double-layered soil; Electro-osmosis; Load; One-dimensional consolidation;

D O I：

10.15961/j.jsuese.202100006

中图分类号：

学科分类号：

摘要：

In actual foundation treatment, electro-osmosis is often used in combination with preloading. In order to solve the deficiency in the theory about electro-osmotic consolidation solution considering both load action and layered configuration of soil, a one-dimensional consolidation equation of double-layered soil considering the combined action of load and electro-osmosis is established, by assuming that the flow velocity in soil can be superimposed by the flow velocity caused by hydraulic gradient and the flow velocity caused by potential difference. The analytical solutions for one-dimensional electro-osmotic consolidation of double-layered soil under constant and linear loading are obtained by using the feature function method. The effectiveness of the present solution is assessed by comparing against other existing analytical solutions and electro-osmotic consolidation test results. Based on the solution, the influences of soil parameters and load parameters on the consolidation characteristics of double-layered soil are discussed in detail. The results show that when the permeability of the subsoil is greater than that of the upper soil, in the early stage of consolidation, the amount of water flowing into the soil near the middle of the foundation is greater than the amount flowing out due to electro-osmosis, resulting in the phenomenon that the excess pore water pressure increases and the effective stress decreases in the early stage of consolidation. Reducing the compressibility of subsoil can improve the settlement rate and the excess pore water pressure dissipation rate of double-layered soil. Compared with the single electro-osmosis consolidation, the combined action of the load and electro-osmosis can not only improve the settlement rate of the double-layered soil, but also improve the strength of foundation after consolidation, which is more conducive to reducing the settlement after construction and speeding up the foundation treatment rate. Copyright ©2022 Advanced Engineering Sciences. All rights reserved.

引用

页码：170 / 179

页数：9

共 30 条

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