Analytical solution for one-dimensional consolidation in layered filled soil based on continuous boundary conditions

Zhang Yunpeng; Wang Zongqin; Zong Mengfan; Wu Wenbing; Wang Lixing

doi:10.19509/j.cnki.dzkq.2022.0171

Volume 42 Issue 3

May 2023

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Article Navigation > Bulletin of Geological Science and Technology > 2023 > 42(3): 38-45

Zhang Yunpeng, Wang Zongqin, Zong Mengfan, Wu Wenbing, Wang Lixing. Analytical solution for one-dimensional consolidation in layered filled soil based on continuous boundary conditions[J]. Bulletin of Geological Science and Technology, 2023, 42(3): 38-45. doi: 10.19509/j.cnki.dzkq.2022.0171

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Zhang Yunpeng, Wang Zongqin, Zong Mengfan, Wu Wenbing, Wang Lixing. Analytical solution for one-dimensional consolidation in layered filled soil based on continuous boundary conditions[J]. Bulletin of Geological Science and Technology, 2023, 42(3): 38-45. doi: 10.19509/j.cnki.dzkq.2022.0171

Citation:

Zhang Yunpeng, Wang Zongqin, Zong Mengfan, Wu Wenbing, Wang Lixing. Analytical solution for one-dimensional consolidation in layered filled soil based on continuous boundary conditions[J]. Bulletin of Geological Science and Technology, 2023, 42(3): 38-45. doi: 10.19509/j.cnki.dzkq.2022.0171

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Analytical solution for one-dimensional consolidation in layered filled soil based on continuous boundary conditions

doi: 10.19509/j.cnki.dzkq.2022.0171

a.
Faculty of Engineering, China University of Geosciences(Wuhan), Wuhan 430074, China
b.
Zhejiang Institute, China University of Geosciences(Wuhan), Hangzhou 311305, China

Received Date: 24 Dec 2021

Abstract

Abstract

The newly filled soil in reclamation areas shows a significant consolidation effect, resulting in severe ground settlements and inducing extremely adverse impacts on the stability of foundations on site. Based on the continuous boundary conditions, this paper establishes a one-dimensional filled soil-native seabed consolidation theory with consideration of the self-weight of the filled soil and the bedding characteristics of the seabed simultaneously, and derives an analytical solutions to the response of the excess pore water pressure and the consolidation degree through the eigenfunction method. The proposed solution is subsequently verified through the degradation of the boundary conditions and mathematical models. By virtue of the proposed solution, a parametric study is conducted to investigate the influence of the spatio-temporal impact factors (including the self-weight of the filled soil, moduli of the filled soil, time factor, and additional load at ground) on the consolidation. The main conclusions can be drawn as follows: ①The self-weight of the filled soil drives the consolidation of the newly filled ground and should not be ignored in practical engineering. ②The effect of the permeability coefficient on the dissipation of the excess pore water pressure is relatively complicated. In case of change in the penetrability of a certain soil layer, it will have opposite influences on the excess pore water pressure of the overlying and underlying soil layers. ③The volume compressibility of the soil has a significant influence on the excess water pressure. And the influence of the volume compressibility of the deeply buried soil is more significant. ④The additional load caused by, for instance, the stacking at the ground, will slow down the consolidation of the site.
- layered filled soil,
- one-dimensional consolidation,
- continuous drainage boundary,
- self-weigh,
- alytical solution

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