Critical suction pressure during installation of suction caissons in sand

Panagoulias, B.F.J. van Dijk, T. Drummen, Amin Askarinejad, F. Pisano

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

Abstract

When instalhng suction caissons in sand, the suction process will induce an upward flow, which reduces the effective stress in the soil inside the caisson. The suction pressure cannot be increased indefinitely. I f a critical suction pressure is exceeded, liquefaction, boiling and/or piping occurs. This will halt the installation process. This paper presents results from a novel laboratory upward flow test (LUFT), to investigate the soil mechanisms affecting the critical suction pressure. The LUFT apparatus is based on a conventional permeameter. As suggested by the results of published full/small scale installation tests, LUFT results confirm that, in dense to very dense sand, most conventional critical suction prediction models underestimate the values observed in reality. It is argued that soil arching contributes to the achievable high values for critical
suction pressure. Higher allowable suction pressures may be cost effective.
Original languageEnglish
Title of host publicationProceedings of the 8th Offshore Site Investigation and Geotechnics International Conference, 12-14 September 2017
Subtitle of host publicationOffshore site investigation and geotechnics. Smarter Solutions for Future Offshore Developments London, UK
Pages570-577
Publication statusPublished - 2017
Event8th Offshore Site Investigation and Geotechnics International Conference: Smarter Solutions for Future Offshore Developments - The historic Royal Geographical Society, London, United Kingdom
Duration: 12 Sep 201714 Sep 2017
Conference number: 8
http://www.sutconnects.com/

Conference

Conference8th Offshore Site Investigation and Geotechnics International Conference
Abbreviated titleOSIG 2017
CountryUnited Kingdom
CityLondon
Period12/09/1714/09/17
Internet address

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    Panagoulias, van Dijk, B. F. J., Drummen, T., Askarinejad, A., & Pisano, F. (2017). Critical suction pressure during installation of suction caissons in sand. In Proceedings of the 8th Offshore Site Investigation and Geotechnics International Conference, 12-14 September 2017: Offshore site investigation and geotechnics. Smarter Solutions for Future Offshore Developments London, UK (pp. 570-577)