Abstract
A three-dimensional short-crested wave system produced by waves reflecting obliquely from a breakwater is more conducive to soil instability in the porous seabed than the action of a two-dimensional progressive wave. The excess pore pressure induced within the sedimentary seabed can result in liquefaction and trench scouring; hence causing structural failure. General solutions are presented for soil response in a porous seabed induced by a partial short-crested wave formed by angled incident waves and partially reflected waves. The potential of liquefaction under the action of such a wave system is evaluated for the regions in the seabed fronting a breakwater. The effects of several pertinent wave and soil parameters on the liquefaction potential are then examined in detail—these including reflection coefficient, relative water depth, degree of soil saturation and soil permeability.
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