Abstract
The effects of wave-induced seepage on an impervious breakwater, resting on a submerged bed of sand, and constructed with an extended foundation base, are considered. The problem formulation and solution are developed for the general case of a sandy bed with finite thickness. Two-dimensional potential flow theory is used to obtain an exact analytical solution for the seepage pressure in the entire sand bed. By integration of the pressure distribution along the underside of the breakwater, simple expressions, in terms of tabulated functions, for the wave-induced uplift force and the overturning moment exerted on the breakwater are also obtained. The results for the force are compared with the theoretical results obtained by Liu 1 1 Liu, 1985. for a breakwater without a foundation base, by Durand and Monkmeyer 2 2 Durand and Monkmeyer, 1982. for a sea bed of infinite thickness and by Dias and Monkmeyer 3 3 Dias and Monkmeyer, 1986. for a breakwater reduced to its foundation.
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