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

作者：Jeng D S^*; Seymour B R; Li J

来源：International Journal for Numerical and Analytical Methods in Geomechanics, 2007, 31(1): 53-69.

DOI：10.1002/nag.547

• pore pressure accumulation
• shear stress
• cyclic loading
• liquefaction

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; 25:885907; 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; 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.

• 出版日期2007-1