Numerical Back Analysis of Smear Zone Properties for Vertical Drain Assisted Preloading in Soft Soils

Parsa Pajouh, A; Fatahi, B; Khabbaz, H

Numerical Back Analysis of Smear Zone Properties for Vertical Drain Assisted Preloading in Soft Soils

Parsa Pajouh, A Fatahi, B

Khabbaz, H

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Publisher:: Curtin University
Publication Type:: Conference Proceeding
Citation:: ICAGE 2011 - Proceedings of the International Conference on Advances in Geotechnical Engineering, 2011, pp. 561 - 566
Issue Date:: 2011-01

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Field	Value	Language
dc.contributor.author	Parsa Pajouh, A	en_US
dc.contributor.author	Fatahi, B https://orcid.org/0000-0002-7920-6946	en_US
dc.contributor.author	Khabbaz, H https://orcid.org/0000-0001-6637-4601	en_US
dc.contributor.editor	Shahin, MA	en_US
dc.contributor.editor	Nikraz, HR	en_US
dc.date	2011-11-07	en_US
dc.date.issued	2011-01	en_US
dc.identifier.citation	ICAGE 2011 - Proceedings of the International Conference on Advances in Geotechnical Engineering, 2011, pp. 561 - 566	en_US
dc.identifier.isbn	978-0-646-55142-5	en_US
dc.identifier.uri	http://hdl.handle.net/10453/31278
dc.description.abstract	Installation of prefabricated vertical drains (PVDs) using a mandrel causes disturbance of the clay surrounding the drain, resulting in a smear zone of reduced permeability, which adversely affects consolidation process. There are two important parameters to characterize the smear effects, namely, the smear zone diameter and the permeability ratio. In this study, FLAC finites difference software has been employed to investigate the effects of smear zone characteristics on required time for preloading. The results of a fully instrumented trial embankment in Sunshine Motorway, Queensland, have been used to verify the model, and parametric studies have been conducted on the predicted ground settlement and pore water pressure. According to the results, changes in smear zone parameters can significantly affect the consolidation period. It is observed that the characteristics of smear zone namely size and permeability have a substantial impact on the preloading design to achieve a certain soil strength and stiffness satisfying both bearing capacity and settlement design criteria.	en_US
dc.publisher	Curtin University	en_US
dc.relation.ispartof	ICAGE 2011 - Proceedings of the International Conference on Advances in Geotechnical Engineering	en_US
dc.relation.ispartof	International Conference on Advances in Geotechnical Engineering	en_US
dc.title	Numerical Back Analysis of Smear Zone Properties for Vertical Drain Assisted Preloading in Soft Soils	en_US
dc.type	Conference Proceeding
utslib.location	Perth, Australia	en_US
utslib.location.activity	Perth, Australia	en_US
utslib.for	090501 Civil Geotechnical Engineering	en_US
dc.location.activity	Perth, Australia
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CBI - Centre for Built Infrastructure
utslib.copyright.status	closed_access
pubs.consider-herdc	true	en_US
pubs.finish-date	2011-11-09	en_US
pubs.place-of-publication	Perth, Australia	en_US
pubs.start-date	2011-11-07	en_US

Abstract:

Installation of prefabricated vertical drains (PVDs) using a mandrel causes disturbance of the clay surrounding the drain, resulting in a smear zone of reduced permeability, which adversely affects consolidation process. There are two important parameters to characterize the smear effects, namely, the smear zone diameter and the permeability ratio. In this study, FLAC finites difference software has been employed to investigate the effects of smear zone characteristics on required time for preloading. The results of a fully instrumented trial embankment in Sunshine Motorway, Queensland, have been used to verify the model, and parametric studies have been conducted on the predicted ground settlement and pore water pressure. According to the results, changes in smear zone parameters can significantly affect the consolidation period. It is observed that the characteristics of smear zone namely size and permeability have a substantial impact on the preloading design to achieve a certain soil strength and stiffness satisfying both bearing capacity and settlement design criteria.

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http://hdl.handle.net/10453/31278