Abstract
The growing pressure for jack-up rigs to relocate during more challenging metocean conditions for offshore wind turbine installation and maintenance has increased the risk of dynamic leg loading during the set down of the spudcan footings into the seabed. To better understand the rapid sand-spudcan interaction, this study presents experimental results of a model spudcan
jacked at a range of penetration rates into dry and saturated sand at both 1g and 50g gravitational acceleration. In order to achieve a wide range of consolidation conditions, the sand was saturated using both water and a viscous pore fluid (methocel cellulose ethers) with kinematic viscosity 680 times higher than water in the 50g centrifuge tests. The results indicated up to 120% increase in spudcan penetration resistance due to the dilatancy-induced suction when the
onsolidation response changes from drained to undrained. This change in
spudcan penetration resistance is quantified using a proposed backbone curve framework.
jacked at a range of penetration rates into dry and saturated sand at both 1g and 50g gravitational acceleration. In order to achieve a wide range of consolidation conditions, the sand was saturated using both water and a viscous pore fluid (methocel cellulose ethers) with kinematic viscosity 680 times higher than water in the 50g centrifuge tests. The results indicated up to 120% increase in spudcan penetration resistance due to the dilatancy-induced suction when the
onsolidation response changes from drained to undrained. This change in
spudcan penetration resistance is quantified using a proposed backbone curve framework.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the 4th International Symposium on Frontiers in Offshore Geotechnics (ISFOG) |
| Place of Publication | USA |
| Publisher | Deep Foundations Institute |
| Pages | 2238-2247 |
| Publication status | Published - 2020 |
| Event | 4th International Symposium on Frontiers in Offshore Geotechnics - Austin, United States Duration: 8 Nov 2020 → 11 Nov 2020 Conference number: 4 https://www.isfog2020.org/proceedings |
Conference
| Conference | 4th International Symposium on Frontiers in Offshore Geotechnics |
|---|---|
| Abbreviated title | ISFOG 2020 |
| Country/Territory | United States |
| City | Austin |
| Period | 8/11/20 → 11/11/20 |
| Internet address |