New theoretical solution for soft soil consolidation under vacuum pressure via horizontal drainage enhanced geotextile sheets

Land reclamation is a major construction activity in Singapore and other Asian countries. When granular fills become scarce, soft materials have to be used for land reclamation. A new land reclamation and soil improvement method using vacuum preloading and horizontal drainage enhanced non-woven geot...

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Main Authors: Chen, Hao, Chu, Jian, Wu, Shifan, Guo, Wei, Lam, Kok Pang
Other Authors: School of Civil and Environmental Engineering
Format: Article
Language:English
Published: 2024
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Online Access:https://hdl.handle.net/10356/180367
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1803672024-10-15T01:08:17Z New theoretical solution for soft soil consolidation under vacuum pressure via horizontal drainage enhanced geotextile sheets Chen, Hao Chu, Jian Wu, Shifan Guo, Wei Lam, Kok Pang School of Civil and Environmental Engineering Engineering Vacuum preloading Soft soil Horizontal drains Horizontal drainage enhanced geotextile sheets Theoretical solution Finite element analyses Land reclamation is a major construction activity in Singapore and other Asian countries. When granular fills become scarce, soft materials have to be used for land reclamation. A new land reclamation and soil improvement method using vacuum preloading and horizontal drainage enhanced non-woven geotextile (HDeG) sheets for soft soil consolidation has been proposed to reduce consolidation time and save costs. This paper presents a new theoretical solution for analysing the consolidation process of soil under vacuum pressure via horizontal drainage enhanced geotextile sheets as such a solution is not available yet. To verify the proposed theoretical solution, model tests and finite element analyses (FEA) have also been conducted. The proposed analytical solution agrees well with the results from FEA and the model tests in settlement, average effective stress and degree of consolidation. Thus, this solution could be used for design and analysis for land reclamation with soft materials consolidated using vacuum preloading together with HDeG sheets or other horizontal drainage materials with an adequately high transmissivity. The prediction of the consolidation performance relies on the proper selection of the coefficient of consolidation based on the effective stress history of soil. Nanyang Technological University Singapore Maritime Institute (SMI) The authors would like to acknowledge gratefully the study presented in this paper is financial support provided through Grant No. SMI-2022-MTP-02 by Singapore Maritime Institute. The support from Centre for Urban Solutions, School of Civil and Environmental Engineering, Nanyang Technological University (NTU), Singapore, is also gratefully acknowledged. The first author is also grateful to the scholarship provided by NTU for his PhD. 2024-10-15T01:06:43Z 2024-10-15T01:06:43Z 2025 Journal Article Chen, H., Chu, J., Wu, S., Guo, W. & Lam, K. P. (2025). New theoretical solution for soft soil consolidation under vacuum pressure via horizontal drainage enhanced geotextile sheets. Geotextiles and Geomembranes, 53(1), 155-168. https://dx.doi.org/10.1016/j.geotexmem.2024.09.011 0266-1144 https://hdl.handle.net/10356/180367 10.1016/j.geotexmem.2024.09.011 1 53 155 168 en SMI-2022-MTP-02 Geotextiles and Geomembranes © 2024 Published by Elsevier Ltd. All rights reserved.
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering
Vacuum preloading
Soft soil
Horizontal drains
Horizontal drainage enhanced geotextile sheets
Theoretical solution
Finite element analyses
spellingShingle Engineering
Vacuum preloading
Soft soil
Horizontal drains
Horizontal drainage enhanced geotextile sheets
Theoretical solution
Finite element analyses
Chen, Hao
Chu, Jian
Wu, Shifan
Guo, Wei
Lam, Kok Pang
New theoretical solution for soft soil consolidation under vacuum pressure via horizontal drainage enhanced geotextile sheets
description Land reclamation is a major construction activity in Singapore and other Asian countries. When granular fills become scarce, soft materials have to be used for land reclamation. A new land reclamation and soil improvement method using vacuum preloading and horizontal drainage enhanced non-woven geotextile (HDeG) sheets for soft soil consolidation has been proposed to reduce consolidation time and save costs. This paper presents a new theoretical solution for analysing the consolidation process of soil under vacuum pressure via horizontal drainage enhanced geotextile sheets as such a solution is not available yet. To verify the proposed theoretical solution, model tests and finite element analyses (FEA) have also been conducted. The proposed analytical solution agrees well with the results from FEA and the model tests in settlement, average effective stress and degree of consolidation. Thus, this solution could be used for design and analysis for land reclamation with soft materials consolidated using vacuum preloading together with HDeG sheets or other horizontal drainage materials with an adequately high transmissivity. The prediction of the consolidation performance relies on the proper selection of the coefficient of consolidation based on the effective stress history of soil.
author2 School of Civil and Environmental Engineering
author_facet School of Civil and Environmental Engineering
Chen, Hao
Chu, Jian
Wu, Shifan
Guo, Wei
Lam, Kok Pang
format Article
author Chen, Hao
Chu, Jian
Wu, Shifan
Guo, Wei
Lam, Kok Pang
author_sort Chen, Hao
title New theoretical solution for soft soil consolidation under vacuum pressure via horizontal drainage enhanced geotextile sheets
title_short New theoretical solution for soft soil consolidation under vacuum pressure via horizontal drainage enhanced geotextile sheets
title_full New theoretical solution for soft soil consolidation under vacuum pressure via horizontal drainage enhanced geotextile sheets
title_fullStr New theoretical solution for soft soil consolidation under vacuum pressure via horizontal drainage enhanced geotextile sheets
title_full_unstemmed New theoretical solution for soft soil consolidation under vacuum pressure via horizontal drainage enhanced geotextile sheets
title_sort new theoretical solution for soft soil consolidation under vacuum pressure via horizontal drainage enhanced geotextile sheets
publishDate 2024
url https://hdl.handle.net/10356/180367
_version_ 1814777701899173888