CONSOLIDATION INTEGRATED BUOYANCY EQUATION FOR SOFT GROUND IMPROVED WITH LIGHTWEIGHT POLYURETHANE FOAM

Consolidation settlement occurs when a saturated soil is subjected to an increase in overburden pressure that causes a volume change in the soil. When a lightweight material is used as a ground improvement, the stress is reduced as the soft soil is partially removed and replaced by the lightweight m...

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Published in:IIUM Engineering Journal
Main Author: Lat D.C.; Jais I.B.M.; Ali N.; Yunus N.Z.M.; Norzarin N.H.W.; Zainuddin A.N.
Format: Article
Language:English
Published: International Islamic University Malaysia-IIUM 2022
Online Access:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85126384567&doi=10.31436%2fIIUMEJ.V23I1.1781&partnerID=40&md5=36b418bacde2fad64705d8d66a021892
id 2-s2.0-85126384567
spelling 2-s2.0-85126384567
Lat D.C.; Jais I.B.M.; Ali N.; Yunus N.Z.M.; Norzarin N.H.W.; Zainuddin A.N.
CONSOLIDATION INTEGRATED BUOYANCY EQUATION FOR SOFT GROUND IMPROVED WITH LIGHTWEIGHT POLYURETHANE FOAM
2022
IIUM Engineering Journal
23
1
10.31436/IIUMEJ.V23I1.1781
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85126384567&doi=10.31436%2fIIUMEJ.V23I1.1781&partnerID=40&md5=36b418bacde2fad64705d8d66a021892
Consolidation settlement occurs when a saturated soil is subjected to an increase in overburden pressure that causes a volume change in the soil. When a lightweight material is used as a ground improvement, the stress is reduced as the soft soil is partially removed and replaced by the lightweight material. In addition, the improved ground with lightweight material has a potential to uplift due to the buoyancy of lightweight material. The uplift force reduces the stress imposed on the underlying soil as it acts in the upward direction, thus further reducing the consolidation settlement. This study is executed to produce an alternative equation for consolidation settlement incorporating the buoyancy effect for lightweight polyurethane (PU) foam as a ground improvement method. A Rowe Cell consolidation laboratory test was conducted on untreated marine clay soil as well as on improved marine clay with different thicknesses of lightweight PU foam. Validation of the laboratory test results was done by finite element analysis, PLAXIS 2D. The thickness of PU foam governs the buoyancy and the hydrostatic pressure of water displaced by PU foam, which is incorporated in the alternative equation. The alternative consolidation settlement equation is applicable for ground improved with lightweight polyurethane foam and found to be more economical and practical as the buoyancy is taken into account in the equation © 2022, IIUM Engineering Journal. All Rights Reserved.
International Islamic University Malaysia-IIUM
1511788X
English
Article
All Open Access; Gold Open Access
author Lat D.C.; Jais I.B.M.; Ali N.; Yunus N.Z.M.; Norzarin N.H.W.; Zainuddin A.N.
spellingShingle Lat D.C.; Jais I.B.M.; Ali N.; Yunus N.Z.M.; Norzarin N.H.W.; Zainuddin A.N.
CONSOLIDATION INTEGRATED BUOYANCY EQUATION FOR SOFT GROUND IMPROVED WITH LIGHTWEIGHT POLYURETHANE FOAM
author_facet Lat D.C.; Jais I.B.M.; Ali N.; Yunus N.Z.M.; Norzarin N.H.W.; Zainuddin A.N.
author_sort Lat D.C.; Jais I.B.M.; Ali N.; Yunus N.Z.M.; Norzarin N.H.W.; Zainuddin A.N.
title CONSOLIDATION INTEGRATED BUOYANCY EQUATION FOR SOFT GROUND IMPROVED WITH LIGHTWEIGHT POLYURETHANE FOAM
title_short CONSOLIDATION INTEGRATED BUOYANCY EQUATION FOR SOFT GROUND IMPROVED WITH LIGHTWEIGHT POLYURETHANE FOAM
title_full CONSOLIDATION INTEGRATED BUOYANCY EQUATION FOR SOFT GROUND IMPROVED WITH LIGHTWEIGHT POLYURETHANE FOAM
title_fullStr CONSOLIDATION INTEGRATED BUOYANCY EQUATION FOR SOFT GROUND IMPROVED WITH LIGHTWEIGHT POLYURETHANE FOAM
title_full_unstemmed CONSOLIDATION INTEGRATED BUOYANCY EQUATION FOR SOFT GROUND IMPROVED WITH LIGHTWEIGHT POLYURETHANE FOAM
title_sort CONSOLIDATION INTEGRATED BUOYANCY EQUATION FOR SOFT GROUND IMPROVED WITH LIGHTWEIGHT POLYURETHANE FOAM
publishDate 2022
container_title IIUM Engineering Journal
container_volume 23
container_issue 1
doi_str_mv 10.31436/IIUMEJ.V23I1.1781
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85126384567&doi=10.31436%2fIIUMEJ.V23I1.1781&partnerID=40&md5=36b418bacde2fad64705d8d66a021892
description Consolidation settlement occurs when a saturated soil is subjected to an increase in overburden pressure that causes a volume change in the soil. When a lightweight material is used as a ground improvement, the stress is reduced as the soft soil is partially removed and replaced by the lightweight material. In addition, the improved ground with lightweight material has a potential to uplift due to the buoyancy of lightweight material. The uplift force reduces the stress imposed on the underlying soil as it acts in the upward direction, thus further reducing the consolidation settlement. This study is executed to produce an alternative equation for consolidation settlement incorporating the buoyancy effect for lightweight polyurethane (PU) foam as a ground improvement method. A Rowe Cell consolidation laboratory test was conducted on untreated marine clay soil as well as on improved marine clay with different thicknesses of lightweight PU foam. Validation of the laboratory test results was done by finite element analysis, PLAXIS 2D. The thickness of PU foam governs the buoyancy and the hydrostatic pressure of water displaced by PU foam, which is incorporated in the alternative equation. The alternative consolidation settlement equation is applicable for ground improved with lightweight polyurethane foam and found to be more economical and practical as the buoyancy is taken into account in the equation © 2022, IIUM Engineering Journal. All Rights Reserved.
publisher International Islamic University Malaysia-IIUM
issn 1511788X
language English
format Article
accesstype All Open Access; Gold Open Access
record_format scopus
collection Scopus
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