Settlement analysis of prefabricated vertical drain by finite element analysis for treated road embankment

Prefabricated vertical drains with incorporated with preloading has been used widely as a ground improvement technique in geotechnical engineering. Prefabricated vertical drains would be essential to speed up the settlement of subsoil in embankment and soft ground construction. The prediction in the...

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Main Author:	Mohamad, Khairul Anuar
Format:	Thesis
Language:	English
Published:	2017
Subjects:	TA Engineering (General) Civil engineering (General)
Online Access:	http://eprints.utm.my/id/eprint/78649/1/KhairulAnuarMohamadMFKA20171.pdf
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spelling	my-utm-ep.786492018-08-29T07:35:37Z Settlement analysis of prefabricated vertical drain by finite element analysis for treated road embankment 2017-06 Mohamad, Khairul Anuar TA Engineering (General). Civil engineering (General) Prefabricated vertical drains with incorporated with preloading has been used widely as a ground improvement technique in geotechnical engineering. Prefabricated vertical drains would be essential to speed up the settlement of subsoil in embankment and soft ground construction. The prediction in the embankment settlement is a critically important issue for serviceability of road, especially the pre-construction settlement. In this study, Finite Element Analysis was done for analysing viability of PVD modelling in subsoil using Plaxis 2D 2016 software. Asaoka’s method were used to analyse the field monitoring data that was gathered at a location of an embankments. This method is used to determine ultimate settlement and back calculated coefficient for the horizontal consolidation at a certain location of the embankments. The settlement prediction and the actual measurement at a case study in terms of time to reach 90% consolidation were compared with the field instrumentation results in order to verify the design approach used. Subsequently, the effect of smear disturbance was considered in the parametric study. Various equivalent diameter of influence zone of the PVD are simulated in the modelling of embankment to study the effect of consolidation degree to the drain spacing. Based on the performed analysis, the installation of PVD is proved to improve the rate of settlement and the dissipation of pore water pressures. The rate of settlement decreases as the smear disturbance and drain spacing increase. Modelling of PVD with smear ratio kh/ks of 6.0 and drain spacing of 1.0 m shows good agreement with the field measurement. 2017-06 Thesis http://eprints.utm.my/id/eprint/78649/ http://eprints.utm.my/id/eprint/78649/1/KhairulAnuarMohamadMFKA20171.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:111333 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) Mohamad, Khairul Anuar Settlement analysis of prefabricated vertical drain by finite element analysis for treated road embankment
description	Prefabricated vertical drains with incorporated with preloading has been used widely as a ground improvement technique in geotechnical engineering. Prefabricated vertical drains would be essential to speed up the settlement of subsoil in embankment and soft ground construction. The prediction in the embankment settlement is a critically important issue for serviceability of road, especially the pre-construction settlement. In this study, Finite Element Analysis was done for analysing viability of PVD modelling in subsoil using Plaxis 2D 2016 software. Asaoka’s method were used to analyse the field monitoring data that was gathered at a location of an embankments. This method is used to determine ultimate settlement and back calculated coefficient for the horizontal consolidation at a certain location of the embankments. The settlement prediction and the actual measurement at a case study in terms of time to reach 90% consolidation were compared with the field instrumentation results in order to verify the design approach used. Subsequently, the effect of smear disturbance was considered in the parametric study. Various equivalent diameter of influence zone of the PVD are simulated in the modelling of embankment to study the effect of consolidation degree to the drain spacing. Based on the performed analysis, the installation of PVD is proved to improve the rate of settlement and the dissipation of pore water pressures. The rate of settlement decreases as the smear disturbance and drain spacing increase. Modelling of PVD with smear ratio kh/ks of 6.0 and drain spacing of 1.0 m shows good agreement with the field measurement.
format	Thesis
qualification_level	Master's degree
author	Mohamad, Khairul Anuar
author_facet	Mohamad, Khairul Anuar
author_sort	Mohamad, Khairul Anuar
title	Settlement analysis of prefabricated vertical drain by finite element analysis for treated road embankment
title_short	Settlement analysis of prefabricated vertical drain by finite element analysis for treated road embankment
title_full	Settlement analysis of prefabricated vertical drain by finite element analysis for treated road embankment
title_fullStr	Settlement analysis of prefabricated vertical drain by finite element analysis for treated road embankment
title_full_unstemmed	Settlement analysis of prefabricated vertical drain by finite element analysis for treated road embankment
title_sort	settlement analysis of prefabricated vertical drain by finite element analysis for treated road embankment
granting_institution	Universiti Teknologi Malaysia, Faculty of Civil Engineering
granting_department	Faculty of Civil Engineering
publishDate	2017
url	http://eprints.utm.my/id/eprint/78649/1/KhairulAnuarMohamadMFKA20171.pdf
_version_	1747818037365440512

Settlement analysis of prefabricated vertical drain by finite element analysis for treated road embankment

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