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Components of Suction Caisson Capacity Measured in Axial Pullout Tests
Laboratory experiments are being conducted to study the behavior of suction caissons used for deep offshore moorings. Results from nine caisson pullout tests were used to quantify the components of axial capacity. Tests with a 100-mm diameter caisson prototype, installed using dead weight or suction, were performed in a 1.1-m thick deposit of kaolinite. Large tanks of normally consolidated clay, selected to simulate common seafloor conditions, were prepared by consolidating a kaolinite slurry. Axial pullout tests were carried out on caissons inserted using dead weight only or dead weight plus suction pressure, on caissons pulled with a vented or sealed top cap, and with rapid (undrained) versus slow (drained) pullout. Measured axial capacities are interpreted in terms of the weight of extracted soil, side resistance on the caisson walls, and reverse end bearing capacity at the tip. For rapid pullout with a sealed top cap, the test results indicate an external side resistance factor (α) of 0.5 to 0.8 and a reverse end bearing factor (N'c) of 13 to 21.
Components of Suction Caisson Capacity Measured in Axial Pullout Tests
Laboratory experiments are being conducted to study the behavior of suction caissons used for deep offshore moorings. Results from nine caisson pullout tests were used to quantify the components of axial capacity. Tests with a 100-mm diameter caisson prototype, installed using dead weight or suction, were performed in a 1.1-m thick deposit of kaolinite. Large tanks of normally consolidated clay, selected to simulate common seafloor conditions, were prepared by consolidating a kaolinite slurry. Axial pullout tests were carried out on caissons inserted using dead weight only or dead weight plus suction pressure, on caissons pulled with a vented or sealed top cap, and with rapid (undrained) versus slow (drained) pullout. Measured axial capacities are interpreted in terms of the weight of extracted soil, side resistance on the caisson walls, and reverse end bearing capacity at the tip. For rapid pullout with a sealed top cap, the test results indicate an external side resistance factor (α) of 0.5 to 0.8 and a reverse end bearing factor (N'c) of 13 to 21.
Components of Suction Caisson Capacity Measured in Axial Pullout Tests
Luke, Adam M. (author) / Rauch, Alan F. (author) / Olson, Roy E. (author) / Mecham, Elliott C. (author)
International Symposium on Deepwater Mooring Systems ; 2003 ; Houston, Texas, United States
Deepwater Mooring Systems ; 1-12
2003-09-25
Conference paper
Electronic Resource
English
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