Wave-induced pore pressure around a buried pipeline in Gibson soil: Finiteelement analysis

The water wave-induced pore pressure on a pipeline buried in a porous seabe d is investigated. Unlike conventional investigations, shear modulus of the seabed is considered to vary with soil depth in this study. The boundary v alue problem describing soil stresses as well as pore water pressure under periodical wave loading is solved numerically by using a Finite Element Met hod. Employing the principle of repeatability, the lateral boundary conditi ons are obtained first and verified with previous analytical solutions. The n, the wave-sealed-pipe interaction problem can be solved to obtain the wav e-induced soil response. The effects of variable shear modulus, geometry of the pipe and the degree of saturation on the wave-induced pore pressure ar e found to be significant. Copyright (C) 1999 John Wiley & Sons, Ltd.