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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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. |
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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 |
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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. |
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School of Civil and Environmental Engineering |
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School of Civil and Environmental Engineering Chen, Hao Chu, Jian Wu, Shifan Guo, Wei Lam, Kok Pang |
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Article |
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Chen, Hao Chu, Jian Wu, Shifan Guo, Wei Lam, Kok Pang |
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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 |
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New theoretical solution for soft soil consolidation under vacuum pressure via horizontal drainage enhanced geotextile sheets |
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new theoretical solution for soft soil consolidation under vacuum pressure via horizontal drainage enhanced geotextile sheets |
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2024 |
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https://hdl.handle.net/10356/180367 |
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