Performance prediction of prefabricated vertical drains beneath embankment on soft ground by finite element analysis

Preloading and prefabricated vertical drain (PVD) is a commonly employed ground improvement technique to expedite consolidation process by means of shortening the drainage path. Advancement in finite element method (FEM) analysis has enabled modeling of PVD in finite element program to acquire settl...

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Main Author:	Gopalan, Thanath
Format:	Thesis
Language:	English
Published:	2010
Subjects:	TA Engineering (General) Civil engineering (General)
Online Access:	http://eprints.utm.my/id/eprint/11420/4/ThanathGopalanMFKA2010.pdf
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id	my-utm-ep.11420
record_format	uketd_dc
spelling	my-utm-ep.114202017-09-20T08:08:01Z Performance prediction of prefabricated vertical drains beneath embankment on soft ground by finite element analysis 2010-07 Gopalan, Thanath TA Engineering (General). Civil engineering (General) Preloading and prefabricated vertical drain (PVD) is a commonly employed ground improvement technique to expedite consolidation process by means of shortening the drainage path. Advancement in finite element method (FEM) analysis has enabled modeling of PVD in finite element program to acquire settlement magnitudes and time rate of consolidation. Monitoring results in particular settlement data from two adjacent zones were analyzed using Asaoka (1978) method estimating the total settlement and back-calculated coefficient of horizontal consolidation of the soil. Thereon, using the back analyzed coefficient of consolidation, computer program PLAXIS v.8 was used to estimate the total settlement and rate of consolidation by means of finite element method (FEM). Reasonable agreement of settlement curves were obtained between the FEM analysis and actual field settlement of the PVD treated ground. However, in FEM analysis, it was observed that the ultimate settlements predicted were less than those determined by Asaoka method, but the degree of consolidation achieved were higher. The horizontal coefficient of consolidation was determined to be in the range of 1.4 m2/yr to 2.6 m2/yr which generally encompasses the conventional design ch/cv ratio of 2. Sensitivity study of the soil horizontal permeability to smeared zone permeability, kh/ks ratio generally indicates that as the ratio exceeds 4, the predicted settlement is underestimated significantly. 2010-07 Thesis http://eprints.utm.my/id/eprint/11420/ http://eprints.utm.my/id/eprint/11420/4/ThanathGopalanMFKA2010.pdf application/pdf en public masters Universiti Teknologi Malaysia, Faculty of Civil Engineering Faculty of Civil Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TA Engineering (General) Civil engineering (General)
spellingShingle	TA Engineering (General) Civil engineering (General) Gopalan, Thanath Performance prediction of prefabricated vertical drains beneath embankment on soft ground by finite element analysis
description	Preloading and prefabricated vertical drain (PVD) is a commonly employed ground improvement technique to expedite consolidation process by means of shortening the drainage path. Advancement in finite element method (FEM) analysis has enabled modeling of PVD in finite element program to acquire settlement magnitudes and time rate of consolidation. Monitoring results in particular settlement data from two adjacent zones were analyzed using Asaoka (1978) method estimating the total settlement and back-calculated coefficient of horizontal consolidation of the soil. Thereon, using the back analyzed coefficient of consolidation, computer program PLAXIS v.8 was used to estimate the total settlement and rate of consolidation by means of finite element method (FEM). Reasonable agreement of settlement curves were obtained between the FEM analysis and actual field settlement of the PVD treated ground. However, in FEM analysis, it was observed that the ultimate settlements predicted were less than those determined by Asaoka method, but the degree of consolidation achieved were higher. The horizontal coefficient of consolidation was determined to be in the range of 1.4 m2/yr to 2.6 m2/yr which generally encompasses the conventional design ch/cv ratio of 2. Sensitivity study of the soil horizontal permeability to smeared zone permeability, kh/ks ratio generally indicates that as the ratio exceeds 4, the predicted settlement is underestimated significantly.
format	Thesis
qualification_level	Master's degree
author	Gopalan, Thanath
author_facet	Gopalan, Thanath
author_sort	Gopalan, Thanath
title	Performance prediction of prefabricated vertical drains beneath embankment on soft ground by finite element analysis
title_short	Performance prediction of prefabricated vertical drains beneath embankment on soft ground by finite element analysis
title_full	Performance prediction of prefabricated vertical drains beneath embankment on soft ground by finite element analysis
title_fullStr	Performance prediction of prefabricated vertical drains beneath embankment on soft ground by finite element analysis
title_full_unstemmed	Performance prediction of prefabricated vertical drains beneath embankment on soft ground by finite element analysis
title_sort	performance prediction of prefabricated vertical drains beneath embankment on soft ground by finite element analysis
granting_institution	Universiti Teknologi Malaysia, Faculty of Civil Engineering
granting_department	Faculty of Civil Engineering
publishDate	2010
url	http://eprints.utm.my/id/eprint/11420/4/ThanathGopalanMFKA2010.pdf
_version_	1747814852720590848

Performance prediction of prefabricated vertical drains beneath embankment on soft ground by finite element analysis

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