Comparison between predicted and observed settlement of vertical drain treated road embankment on soft clay

Prefabricated Vertical Drain (PVD) with surcharge preloading is one of the most widely used techniques to accelerate the process of consolidation. In practice it is sometime difficult to choose proper design parameters in PVD design. Backanalysis from field records is a good method to verify the des...

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Main Author:	Ahmad, Mohd. Redzuan
Format:	Thesis
Language:	English
Published:	2006
Subjects:	TA Engineering (General) Civil engineering (General)
Online Access:	http://eprints.utm.my/id/eprint/3708/1/MohdRedzuanAhmadMFKA2006.pdf
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id	my-utm-ep.3708
record_format	uketd_dc
spelling	my-utm-ep.37082018-01-10T04:11:04Z Comparison between predicted and observed settlement of vertical drain treated road embankment on soft clay 2006-05 Ahmad, Mohd. Redzuan TA Engineering (General). Civil engineering (General) Prefabricated Vertical Drain (PVD) with surcharge preloading is one of the most widely used techniques to accelerate the process of consolidation. In practice it is sometime difficult to choose proper design parameters in PVD design. Backanalysis from field records is a good method to verify the design parameters. This study was undertaken to compare the predicted and monitored settlement of a road embankment on soft clay treated with PVD. Back-calculation of the design parameters was performed based on the available monitoring records. Magnitude of settlement was calculated using the classical one-dimensional consolidation theory. The monitored settlement was then evaluated using Asaokaâ€™s method. Terzaghi- Hansboâ€™s solution was adopted in predicting the time-rate of consolidation with the application of PVD. The analysis and comparison between field and laboratory (or theoretical) value of the settlement design parameters show that the coefficient of volume compressibility mvlab=1.25mvfield, compression ratio CRlab=1.19CRfield, and the ratio of coefficient of horizontal to the vertical consolidation ch/cv= 1.6. ch from piezocone dissipation test was found to be 3 times larger than the back-calculated ch value. The study also suggests that smear effect is a factor which cannot be ignored in the design of PVD 2006-05 Thesis http://eprints.utm.my/id/eprint/3708/ http://eprints.utm.my/id/eprint/3708/1/MohdRedzuanAhmadMFKA2006.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) Ahmad, Mohd. Redzuan Comparison between predicted and observed settlement of vertical drain treated road embankment on soft clay
description	Prefabricated Vertical Drain (PVD) with surcharge preloading is one of the most widely used techniques to accelerate the process of consolidation. In practice it is sometime difficult to choose proper design parameters in PVD design. Backanalysis from field records is a good method to verify the design parameters. This study was undertaken to compare the predicted and monitored settlement of a road embankment on soft clay treated with PVD. Back-calculation of the design parameters was performed based on the available monitoring records. Magnitude of settlement was calculated using the classical one-dimensional consolidation theory. The monitored settlement was then evaluated using Asaokaâ€™s method. Terzaghi- Hansboâ€™s solution was adopted in predicting the time-rate of consolidation with the application of PVD. The analysis and comparison between field and laboratory (or theoretical) value of the settlement design parameters show that the coefficient of volume compressibility mvlab=1.25mvfield, compression ratio CRlab=1.19CRfield, and the ratio of coefficient of horizontal to the vertical consolidation ch/cv= 1.6. ch from piezocone dissipation test was found to be 3 times larger than the back-calculated ch value. The study also suggests that smear effect is a factor which cannot be ignored in the design of PVD
format	Thesis
qualification_level	Master's degree
author	Ahmad, Mohd. Redzuan
author_facet	Ahmad, Mohd. Redzuan
author_sort	Ahmad, Mohd. Redzuan
title	Comparison between predicted and observed settlement of vertical drain treated road embankment on soft clay
title_short	Comparison between predicted and observed settlement of vertical drain treated road embankment on soft clay
title_full	Comparison between predicted and observed settlement of vertical drain treated road embankment on soft clay
title_fullStr	Comparison between predicted and observed settlement of vertical drain treated road embankment on soft clay
title_full_unstemmed	Comparison between predicted and observed settlement of vertical drain treated road embankment on soft clay
title_sort	comparison between predicted and observed settlement of vertical drain treated road embankment on soft clay
granting_institution	Universiti Teknologi Malaysia, Faculty of Civil Engineering
granting_department	Faculty of Civil Engineering
publishDate	2006
url	http://eprints.utm.my/id/eprint/3708/1/MohdRedzuanAhmadMFKA2006.pdf
_version_	1747814466331869184

Comparison between predicted and observed settlement of vertical drain treated road embankment on soft clay

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