A new approximation for pore pressure accumulation in marine sediment due to water waves

• Published in: International Journal for Numerical and Analytical Methods in Geomechanics
• Main Authors: Jeng, D.‐S., Seymour, B. R., Li, J.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Wiley 2006
• Subjects: Arctic
• Online Access: http://dx.doi.org/10.1002/nag.547; https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fnag.547; https://onlinelibrary.wiley.com/doi/pdf/10.1002/nag.547

Abstract The residual mechanism of wave‐induced pore water pressure accumulation in marine sediments is re‐examined. An analytical approximation is derived using a linear relation for pore pressure generation in cyclic loading, and mistakes in previous solutions ( Int. J. Numer. Anal. Methods Geomech. 2001; 25 :885–907; J. Offshore Mech. Arctic Eng. (ASME) 1989; 111 (1):1–11) are corrected. A numerical scheme is then employed to solve the case with a non‐linear relation for pore pressure generation. Both analytical and numerical solutions are verified with experimental data ( Laboratory and field investigation of wave– sediment interaction . Joseph H. Defrees Hydraulics Laboratory, School of Civil and Environmental Engineering, Cornell University, Ithaca, NY, 1983), and provide a better prediction of pore pressure accumulation than the previous solution ( J. Offshore Mech. Arctic Eng. (ASME) 1989; 111 (1):1–11). The parametric study concludes that the pore pressure accumulation and use of full non‐linear relation of pore pressure become more important under the following conditions: (1) large wave amplitude, (2) longer wave period, (3) shallow water, (4) shallow soil and (5) softer soils with a low consolidation coefficient. Copyright © 2006 John Wiley & Sons, Ltd.