Abstract
The effect of wave forces on the stability of a sloping seabed is investigated, using linear wave theory and Biot's theory of poroelasticity. The wave forces on the slope, the wave induced effective stresses and pore pressures are all computed by the boundary element method. The Mohr-Coulomb failure criterion is used to determine the approximate extent of the failure zone. It is found that wave-induced stresses must be analysed throughout an entire wave cycle in order to assess the likelihood of failure, and also that the stability of a slope under waves is strongly dependent on the initial stress distribution.
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