A general description of the dynamics of porous media is given and discussed. Analytical solutions near interfaces are derived using Fourier transform. A finite element program, 'Titan', is developed, which links the phenomena of wave-propagation and consolidation. Non-linear behaviour of the skeleton is taken into account. A pile-driving simulator, a full-scale pile-driving test and a dynamical photoelastic experiment using oil-saturated crushed glass are described. The dynamical behaviour of a breakwater under wave-impact and the pile-driving simulator experiment are calculated using the finite element program Titan.

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