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Consolidation beneath circular skirted foundations

Consolidation beneath circular skirted foundations
Consolidation beneath circular skirted foundations

The effect of foundation embedment on consolidation has not been considered previously in a systematic manner, although this is of particular interest for offshore foundations, where embedment is provided by skirts that enclose a compressible soil plug. For skirted foundations, critical uncertainties include what to assume in terms of the degree of drainage at skirt tip level, and the relative time scales of consolidation within the soil plug and beneath the foundation. In this paper, results from small strain finite-element analyses are used to quantify the immediate and time-dependent response of circular skirted foundations to uniaxial vertical loading. Foundations with frictionless and fully rough skirt-soil interfaces with varying ratio of embedment depth to foundation diameter are considered and the responses compared with those for surface foundations. The findings show that both skirt-soil interface roughness and embedment ratio have a significant effect on the consolidation response.

Foundations, Offshore structures, Soil consolidation
1532-3641
22-29
Gourvenec, Susan
6ff91ad8-1a91-42fe-a3f4-1b5d6f5ce0b8
Randolph, Mark F.
75caa33a-e630-4ae8-84cd-758797bf9633
Gourvenec, Susan
6ff91ad8-1a91-42fe-a3f4-1b5d6f5ce0b8
Randolph, Mark F.
75caa33a-e630-4ae8-84cd-758797bf9633

Gourvenec, Susan and Randolph, Mark F. (2010) Consolidation beneath circular skirted foundations. International Journal of Geomechanics, ASCE, 10 (1), 22-29, [003001QGM]. (doi:10.1061/(ASCE)1532-3641(2010)10:1(22)).

Record type: Article

Abstract

The effect of foundation embedment on consolidation has not been considered previously in a systematic manner, although this is of particular interest for offshore foundations, where embedment is provided by skirts that enclose a compressible soil plug. For skirted foundations, critical uncertainties include what to assume in terms of the degree of drainage at skirt tip level, and the relative time scales of consolidation within the soil plug and beneath the foundation. In this paper, results from small strain finite-element analyses are used to quantify the immediate and time-dependent response of circular skirted foundations to uniaxial vertical loading. Foundations with frictionless and fully rough skirt-soil interfaces with varying ratio of embedment depth to foundation diameter are considered and the responses compared with those for surface foundations. The findings show that both skirt-soil interface roughness and embedment ratio have a significant effect on the consolidation response.

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More information

Published date: January 2010
Keywords: Foundations, Offshore structures, Soil consolidation

Identifiers

Local EPrints ID: 414553
URI: http://eprints.soton.ac.uk/id/eprint/414553
ISSN: 1532-3641
PURE UUID: ff91fb35-8aaa-4cfd-b991-217ac622c9ea
ORCID for Susan Gourvenec: ORCID iD orcid.org/0000-0002-2628-7914

Catalogue record

Date deposited: 04 Oct 2017 16:30
Last modified: 01 Oct 2019 00:25

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