Field Study on Rectangular Inclined Deep Foundation Excavation in Soft Soils

Rao, P; Meng, J; Cui, J; Nimbalkar, S

Field Study on Rectangular Inclined Deep Foundation Excavation in Soft Soils

Rao, P Meng, J Cui, J Nimbalkar, S

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Publisher:: Springer
Publication Type:: Journal Article
Citation:: Geotechnical and Geological Engineering, 2024, 42, (3), pp. 2151-2168
Issue Date:: 2024-01-01

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Field	Value	Language
dc.contributor.author	Rao, P
dc.contributor.author	Meng, J
dc.contributor.author	Cui, J
dc.contributor.author	Nimbalkar, S https://orcid.org/0000-0002-1538-3396
dc.date.accessioned	2025-03-18T00:02:13Z
dc.date.available	2025-03-18T00:02:13Z
dc.date.issued	2024-01-01
dc.identifier.citation	Geotechnical and Geological Engineering, 2024, 42, (3), pp. 2151-2168
dc.identifier.issn	0960-3182
dc.identifier.issn	1573-1529
dc.identifier.uri	http://hdl.handle.net/10453/185943
dc.description.abstract	Due to the twofold influence of irregular excavation and geometric effect, the deformation mechanism of foundation pits is complicated. To investigate the impact of uneven excavation and geometric differences on the deformation characteristics of deep foundation pits, a long tunnel Phase IV deep foundation pit project in Suzhou is used as a case. Through the field measured data, the special effects of inclined pit bottom and rectangular shape are analyzed, and the deformation characteristics of the pit are summarized, as well as compared against the statistical data. The results indicate that the overall deformation of the pit is small since the pit is in a semi-excavated state. The excavation depth has a significant impact on pit deformation, and irregular excavation will cause the distribution of pit deformation to be skewed towards the deeper side of the excavation depth. As a result of the uneven excavation, the actual working condition of each portion of the foundation trench is inconsistent, causing the unexcavated portion to disturb the excavated portion, resulting in an ongoing process of cumulative deformation. Under the influence of the geometric effect of the rectangular pit, the deformation distribution pattern along the longitudinal section of the pit is parabolic with peaks at the centre and minimal towards the ends. The results of this study can provide a reference for the excavation design of the same type of pit and the study of pit deformation characteristics.
dc.language	English
dc.publisher	Springer
dc.relation.ispartof	Geotechnical and Geological Engineering
dc.relation.isbasedon	10.1007/s10706-023-02666-4
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0905 Civil Engineering
dc.subject.classification	Geological & Geomatics Engineering
dc.subject.classification	4005 Civil engineering
dc.subject.classification	4019 Resources engineering and extractive metallurgy
dc.title	Field Study on Rectangular Inclined Deep Foundation Excavation in Soft Soils
dc.type	Journal Article
utslib.citation.volume	42
utslib.for	0905 Civil Engineering
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/UTS Groups
pubs.organisational-group	University of Technology Sydney/UTS Groups/Transport Research Centre (TRC)
pubs.organisational-group	University of Technology Sydney/UTS Groups/Centre for Advanced Modelling and Geospatial lnformation Systems (CAMGIS)
pubs.organisational-group	University of Technology Sydney/UTS Groups/Centre for Built Infrastructure Resilience (CBIR)
utslib.copyright.status	closed_access	*
pubs.consider-herdc	false
dc.date.updated	2025-03-18T00:02:09Z
pubs.issue	3
pubs.publication-status	Published
pubs.volume	42
utslib.citation.issue	3

Abstract:

Due to the twofold influence of irregular excavation and geometric effect, the deformation mechanism of foundation pits is complicated. To investigate the impact of uneven excavation and geometric differences on the deformation characteristics of deep foundation pits, a long tunnel Phase IV deep foundation pit project in Suzhou is used as a case. Through the field measured data, the special effects of inclined pit bottom and rectangular shape are analyzed, and the deformation characteristics of the pit are summarized, as well as compared against the statistical data. The results indicate that the overall deformation of the pit is small since the pit is in a semi-excavated state. The excavation depth has a significant impact on pit deformation, and irregular excavation will cause the distribution of pit deformation to be skewed towards the deeper side of the excavation depth. As a result of the uneven excavation, the actual working condition of each portion of the foundation trench is inconsistent, causing the unexcavated portion to disturb the excavated portion, resulting in an ongoing process of cumulative deformation. Under the influence of the geometric effect of the rectangular pit, the deformation distribution pattern along the longitudinal section of the pit is parabolic with peaks at the centre and minimal towards the ends. The results of this study can provide a reference for the excavation design of the same type of pit and the study of pit deformation characteristics.

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http://hdl.handle.net/10453/185943