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Components of suction caisson capacity measured in axial pullout tests |
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| Authors: | Adam M Alan F Roy E Elliott C |
| Institution: | aGroundwater Services, Inc., 2211 Norfolk, Suite 1000, Houston, TX 77098, USA;bFuller Mossbarger Scott & May Engineers, Inc., 1409 North Forbes Road, Lexington, KY 40511, USA;cDepartment of Civil Engineering, The University of Texas at Austin, 1 University Station C1792, Austin, TX 78712, USA;dFoundation Engineering, 7420 SW Hunziker Road, Suite A, Portland, OR 97223, USA |
| Abstract: | Suction caissons are the foundation of choice for offshore structures in deep water. Systematic study of caisson behavior is relegated to the laboratory due to the high cost of full-scale testing. Our laboratory caisson was installed in normally consolidated clay using dead weight and suction. Tensile axial capacity was measured with the top cap vented or sealed, and with the soil undrained or drained. For the common case of rapid pullout with a sealed top, the test results indicate an external side resistance factor (α) of 0.5–0.8 and a reverse end bearing factor (Nc) of 13–21. |
| Keywords: | Suction caissons Offshore foundations Pullout capacity Tensile loading Prototype tests Normally consolidated soil |
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