Medium-scale Laboratory Model of Mono-bucket Foundation for Installation Tests in Sand

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Abstract

This paper described medium scale test results for bucket foundation installation. The campaign includes both, the jacking and the suction installation tests in the sand. Results allow for better understanding of the interaction between the soil and the bucket skirt. Such observations are desired as there are many issues concerning the suction installation. The suction applied under the bucket lid results in seepage flow inside the surrounding sand. The seepage flow plays a pivotal role in the reduction of the penetration resistance and, therefore, allows for the full penetration despite of the initial large soil resistance. On the other hand, the loosening of inside soil plug might become problematic when the soil approaches its failure stage. The failure happens as a result of soil piping or due to extensive soil heave inside the bucket foundation. All aspects are still not fully understood and challenging, while capturing them into the design, therefore, they are addressed in this paper. Additionally, measurements of pore pressures around the bucket skirts are compared with results of numerical simulations. This allows for validation of the FE-model and enables the analysis of the soil behavior around the skirt.
OriginalsprogEngelsk
TidsskriftCanadian Geotechnical Journal
Vol/bind56
Udgave nummer8
Sider (fra-til)1142-1153
ISSN0008-3674
DOI
StatusUdgivet - 2019

Emneord

  • Bucket foundation
  • Dense sand
  • Suction
  • Seepage
  • Soil resistance

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