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

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.

[1]  M. Biot.  General Theory of Three‐Dimensional Consolidation , 1941 .

[2]  B. Sumer,et al.  Solutions of pore pressure build up due to progressive waves , 2001 .

[3]  Hans Sellmeijer,et al.  On the response of a poro-elastic bed to water waves , 1978, Journal of Fluid Mechanics.

[4]  Chiang C. Mei,et al.  Wave-induced responses in a fluid-filled poro-elastic solid with a free surface : A boundary layer theory , 1981 .

[5]  Dong-Sheng Jeng,et al.  Wave-induced soil response in a nearly saturated sea-bed of finite thickness , 1996 .

[6]  H. Bolton Seed,et al.  Closure of "Sand Liquefaction in Large-Scale Simple Shear Tests" , 1976 .

[7]  A. Mynett,et al.  Wave-induced stresses in a saturated poro-elastic sea bed beneath a rectangular caisson , 1982 .

[8]  Hajime Mase,et al.  Boundary-layer theory for anisotropic seabed response to sea waves , 1999 .

[9]  Dong-Sheng Jeng,et al.  Spring‐neap tide‐induced beach water table fluctuations in a sloping coastal aquifer , 2005 .

[10]  H. Bolton Seed,et al.  Wave‐induced pore pressure in relation to ocean floor stability of cohesionless soils , 1978 .

[11]  W. G. McDougal,et al.  Wave-Induced Pore Water Pressure Accumulation in Marine Soils , 1989 .

[12]  S. Okusa,et al.  Wave-induced stresses in unsaturated submarine sediments , 1985 .

[13]  B. Sumer,et al.  The mechanics of scour in the marine environment , 2002 .

[14]  Hajime Ishida,et al.  Simplified Solutions for Wave-Induced Response of Anisotropic Seabed , 2002 .

[15]  Shinji Sassa,et al.  Progressive solidification of a liquefied sand layer during continued wave loading , 2004 .

[16]  O. Madsen,et al.  Wave-induced pore pressures and effective stresses in a porous bed , 1978 .

[17]  H. Sekiguchi,et al.  Analysis of wave-induced liquefaction of sand beds , 2001 .

[18]  Osamu Okamoto,et al.  Response of Poro-Elastoplastic Beds to Standing Waves. , 1995 .

[19]  Shinji Sassa,et al.  Wave-induced liquefaction of beds of sand in a centrifuge , 1999 .

[20]  D. Jeng,et al.  Wave-induced soil response in an unsaturated anisotropic seabed of finite thickness , 1994 .

[21]  Shinji Sassa,et al.  Analysis of progressive liquefaction as a moving-boundary problem , 2001 .