Exploring the Lateral Capacity of Squat Piles in Soft Clay Through Geotechnical Centrifuge Modelling: OCEANS 2017 19-22 June 2017

Kirstyn Hein, Giovanna Biscontin, Francisco Grajales, Charles P Aubeny, Ryan D Beemer

    Research output: Chapter in Book/Conference paperConference paper

    Abstract

    Many offshore structures currently in use are supported by piles with large length-to-diameter aspect ratios, because it is well known that such foundations can hold large forces and moments. In environments where long piles are not suitable, structures will use foundations with very low aspect ratios such as skirts and mats. Capacity of long piles has been studied for decades and is well documented, whilst more recent tests have also addressed the behaviour of skirts, mats, and other low-aspect ratio foundations. The vertical and lateral capacity of mid-size foundations, with aspect ratios between one and five, has generally been thought too low for the requirements of most offshore structures. However, in recent years, structures of increasingly different shapes and sizes have been used in offshore environments, such as water-based renewable energy sources or marginal oil and gas platforms. In many of these cases, the usage of a low aspect ratio foundation could significantly reduce installation and transportation costs. Limited studies have been performed on such foundations, and most of the existing work uses only analytical and numerical solutions. Geotechnical centrifuge tests and corresponding numerical analyses were started at Texas A&M University and were continued at the University of Cambridge on the lateral capacity of piles with an aspect ratio of two in normally consolidated clay. Piles were loaded under both pure rotation and a mix of rotation and translation. This work is relevant to offshore structures requiring foundations that are strong but easily installed and cost-efficient, specifically structures secured with piles that experience point loads either through or above the water. It is also of interest for structures in difficult environments, such as areas too shallow or sedimentary for long piles or too fragile for skirts and mats.
    Original languageEnglish
    Title of host publicationIEEE Conference Publications
    PublisherIEEE, Institute of Electrical and Electronics Engineers
    ISBN (Electronic)9781509052783
    ISBN (Print)9781509052790
    DOIs
    Publication statusPublished - 2017
    EventOCEANS 2017 - Aberdeen , United Kingdom
    Duration: 19 Jun 201722 Jun 2017

    Conference

    ConferenceOCEANS 2017
    CountryUnited Kingdom
    CityAberdeen
    Period19/06/1722/06/17

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  • Cite this

    Hein, K., Biscontin, G., Grajales, F., Aubeny, C. P., & Beemer, R. D. (2017). Exploring the Lateral Capacity of Squat Piles in Soft Clay Through Geotechnical Centrifuge Modelling: OCEANS 2017 19-22 June 2017. In IEEE Conference Publications [17290812] IEEE, Institute of Electrical and Electronics Engineers. https://doi.org/10.1109/OCEANSE.2017.8084973