Foundation design and installation of the Yolla A Platform

Research output: Chapter in Book/Conference paperConference paper

13 Citations (Scopus)

Abstract

The Yolla A Platform incorporates a new foundation concept, defined as an un-ballasted raft foundation, and was successfully installed in the Bass Strait of Australia in 2004. Soil conditions at the site comprise a complex sequence of normally consolidated calcareous silt, calcareous sand and calcareous clay, and required extensive soil interpretation to support the design process. The foundation is subject to extreme combinations of environmental loading and was designed using a combination of analytical and numerical design tools. Soil preloading using underbase suction was incorporated in the design to facilitate increases in foundation capacity and to limit post installation long term foundation displacements. Skirt penetration and subsequent suction preloading were issues requiring close attention during detailed design, as well as extensive monitoring and interpretation both during and after installation. This paper presents a general overview of the design and installation processes, and includes a summary of observations made during foundation installation.
Original languageEnglish
Title of host publicationProceedings of the 6th International Offshore Site Investigation and Geotechnics Conference: Confronting New Challenges and Sharing Knowledge
Place of PublicationLondon
PublisherSociety for Underwater Technology
Pages399-412
Number of pages14
ISBN (Print)978 0 906940 49 5
Publication statusPublished - 2007
Externally publishedYes
Event6th International Conference on Offshore Site Investigation and Geotechnics - London, United Kingdom
Duration: 11 Sep 200713 Sep 2007

Conference

Conference6th International Conference on Offshore Site Investigation and Geotechnics
CountryUnited Kingdom
CityLondon
Period11/09/0713/09/07

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Cite this

Watson, P. G., & Humpheson, C. (2007). Foundation design and installation of the Yolla A Platform. In Proceedings of the 6th International Offshore Site Investigation and Geotechnics Conference: Confronting New Challenges and Sharing Knowledge (pp. 399-412). London: Society for Underwater Technology.