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:
Online Access:http://eprints.utm.my/id/eprint/11420/4/ThanathGopalanMFKA2010.pdf
http://eprints.utm.my/id/eprint/11420/
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Institution: Universiti Teknologi Malaysia
Language: English
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spelling my.utm.114202017-09-20T08:08:01Z http://eprints.utm.my/id/eprint/11420/ Performance prediction of prefabricated vertical drains beneath embankment on soft ground by finite element analysis 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 NonPeerReviewed application/pdf en http://eprints.utm.my/id/eprint/11420/4/ThanathGopalanMFKA2010.pdf Gopalan, Thanath (2010) Performance prediction of prefabricated vertical drains beneath embankment on soft ground by finite element analysis. Masters thesis, Universiti Teknologi Malaysia, Faculty of Civil Engineering.
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
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
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
publishDate 2010
url http://eprints.utm.my/id/eprint/11420/4/ThanathGopalanMFKA2010.pdf
http://eprints.utm.my/id/eprint/11420/
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