Interface friction angles of a marine clay from interface ring shear and interface shear box tests
Interface friction angles of a marine clay from interface ring shear and interface shear box tests
Most driven pile designs for offshore renewable energy projects in clay rely on the ICP design methods, which are based on interface friction angles. Similarly, pipe-soil interaction studies for offshore oil and gas pipeline projects are based on interface friction angles between seabed and pipeline. These interface friction angles are commonly measured by interface ring shear and interface shear box tests. In this study, a series of comparison test results from Bromhead ring shear and interface shear box tests on a Gulf of Mexico clay are presented. Three surface roughness values, i.e., 0.02, 10, 20 micrometer and two normal stresses, i.e., 5 kPa and 50 kPa are selected to represent driven piles and offshore pipeline materials and design conditions. Overall, the drained residual shear strengths and interface friction angles from the different test methods agreed well, especially when the normal stress was 50 kPa. The measured interface friction angles increased with surface roughness values when the normal stress was 50 kPa. The interface friction angles were high when the normal stress was 5 kPa, compared to the normal stress of 50 kPa case.
Jeong-Yun Won; Maiely Minozzo
5th International Symposium on Frontiers in Offshore Geotechnics (ISFOG2025)
2 - Site characterization, in-situ and laboratory testing, measurement
https://doi.org/10.53243/ISFOG2025-601
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