Numerical Investigation on the Boiling Stability of Sheet Piles Supported Excavations in Cohesionless Soil

Dang, L; Khabbaz, H

Numerical Investigation on the Boiling Stability of Sheet Piles Supported Excavations in Cohesionless Soil

Dang, L Khabbaz, H

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Publisher:: SPRINGER-VERLAG SINGAPORE PTE LTD
Publication Type:: Conference Proceeding
Citation:: Lecture Notes in Civil Engineering, 2022, 203, pp. 401-410
Issue Date:: 2022-01-01

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Field	Value	Language
dc.contributor.author	Dang, L
dc.contributor.author	Khabbaz, H
dc.contributor.editor	Ha-Minh, C
dc.contributor.editor	Tang, AM
dc.contributor.editor	Bui, TQ
dc.contributor.editor	Vu, XH
dc.contributor.editor	Huynh, DVK
dc.date	2021-10-28
dc.date.accessioned	2023-04-06T03:11:13Z
dc.date.available	2023-04-06T03:11:13Z
dc.date.issued	2022-01-01
dc.identifier.citation	Lecture Notes in Civil Engineering, 2022, 203, pp. 401-410
dc.identifier.isbn	9789811671593
dc.identifier.issn	2366-2557
dc.identifier.issn	2366-2565
dc.identifier.uri	http://hdl.handle.net/10453/169285
dc.description.abstract	This paper presents the findings of numerical investigations on the boiling stability against seepage failure of a sheet piled cofferdam supported excavation in cohesionless soil. A numerical analysis based on the finite element method using both plane strain and three-dimensional model was conducted to investigate the influence of seepage force on the stability of supported excavation. The results of this numerical analysis were validated with the report data of a case study on seepage force induced boiling failure inside a sheet pile cofferdam in support of deep excavations. Subsequently, a parametric study was undertaken to evaluate further the influence of different design parameters, including size of excavations against excavated level and penetration depths, on the boiling stability by seepage force of sheet piled-cofferdam supported excavations in sand. The numerical results demonstrated that the cofferdam stability against seepage failure significantly improved with an increase in the cofferdam size. Meanwhile, shallower sheet-pile penetration and deeper excavation level in the cofferdam base were found to have a substantial influence on the excavation base stability when the size effect of cofferdam was taken into consideration. Consequently, possible and practical solutions to improve the boiling stability of sheet pile-supported excavations are also proposed in this investigation.
dc.language	en
dc.publisher	SPRINGER-VERLAG SINGAPORE PTE LTD
dc.relation.ispartof	Lecture Notes in Civil Engineering
dc.relation.ispartof	6th International Conference on Geotechnics, Civil Engineering and Structures (CIGOS)
dc.relation.ispartofseries	Lecture Notes in Civil Engineering
dc.relation.isbasedon	10.1007/978-981-16-7160-9_40
dc.rights	info:eu-repo/semantics/closedAccess
dc.title	Numerical Investigation on the Boiling Stability of Sheet Piles Supported Excavations in Cohesionless Soil
dc.type	Conference Proceeding
utslib.citation.volume	203
utslib.location.activity	Hanoi, VIETNAM
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
pubs.organisational-group	/University of Technology Sydney/Strength - CAMGIS - Centre for Advanced Modelling and Geospatial lnformation Systems
utslib.copyright.status	closed_access	*
dc.date.updated	2023-04-06T03:10:46Z
pubs.finish-date	2021-10-29
pubs.publication-status	Published
pubs.start-date	2021-10-28
pubs.volume	203

Abstract:

This paper presents the findings of numerical investigations on the boiling stability against seepage failure of a sheet piled cofferdam supported excavation in cohesionless soil. A numerical analysis based on the finite element method using both plane strain and three-dimensional model was conducted to investigate the influence of seepage force on the stability of supported excavation. The results of this numerical analysis were validated with the report data of a case study on seepage force induced boiling failure inside a sheet pile cofferdam in support of deep excavations. Subsequently, a parametric study was undertaken to evaluate further the influence of different design parameters, including size of excavations against excavated level and penetration depths, on the boiling stability by seepage force of sheet piled-cofferdam supported excavations in sand. The numerical results demonstrated that the cofferdam stability against seepage failure significantly improved with an increase in the cofferdam size. Meanwhile, shallower sheet-pile penetration and deeper excavation level in the cofferdam base were found to have a substantial influence on the excavation base stability when the size effect of cofferdam was taken into consideration. Consequently, possible and practical solutions to improve the boiling stability of sheet pile-supported excavations are also proposed in this investigation.

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http://hdl.handle.net/10453/169285