Wave-motion reducing structure
A wave-motion reducing structure comprises wave-motion reducing means ( 30 ) suitable for being laid on a coastal bed and restraining means ( 20, 22 ) suitable for restraining the wave-motion reducing means on the coastal bed. The wave-motion reducing means ( 30 ) are arranged so as to be inclined, in use, against the direction of the sea current which strikes them. A wave-motion reducing system comprises a plurality of wave-motion reducing structures arranged in a row lengthwise and in a manner such that the wave-motion reducing means ( 30 ) adopt a substantially parallel configuration and oppose the motion of the current.
1. A wave-motion reducing system comprising a plurality of structures, each structure having a base disposed on a coastal bed and a panel, the base comprising elements for engagement with the panel, the structures being arranged to form a row lengthwise such that the panels adopt a configuration substantially parallel to one another and oppose the wave motion of a sea current, a plurality of rows of said structures being arranged side by side, with respective said panels arranged side by side to form a plurality of continuous panels.
2. A wave-motion system according to claim 1 , further comprising filter means.
3. A wave-motion system according to claim 2 , wherein the filter means alternate with the row of wave-motion reducing structures in a direction transverse to the wave motion.
4. A wave-motion system according to claim 3 , wherein the filter means comprise geo-textile material ballasted with a metal mesh which is plastics-coated.
5. A wave-motion system according to claim 4 , further comprising filter means arranged at edges of the rows of wave-motion reducing structures.
6. A wave-motion system according to claim 5 , wherein the filter means have a width of about 6 meters when the filter means alternate with the wave-motion reducing structures and a width comparable to that of the wave-motion reducing structures when the filter means are arranged at the edges of the wave-motion reducing structures, the system extending for about 100 meters in a direction transverse to the wave motion.
7. A wave-motion system according to claim 1 , further comprising two parallel projecting walls on the base, the walls being inclined to the vertical, the walls together defining a seat which houses one of said panels in use.
8. A wave-motion system according to claim 1 , wherein the base comprises a plurality of longitudinal blocks arranged parallel to one another and interconnected by transverse elements.
9. A wave-motion system according to claim 1 , wherein the panel comprises an upper portion and a lower portion, the lower portion being restrained on the coastal bed.
10. A wave-motion system according to claim 9 , wherein the panel is restrained on the coastal bed so as to be arranged at an inclination of between 30° and 90° to the horizontal.
11. A wave-motion system according to claim 10 , wherein the panel is restrained on the coastal bed so as to be arranged at an inclination of 45° to the horizontal.
12. A wave-motion system according to claim 10 , wherein the panel is restrained on the coastal bed so as to be arranged at an inclination of 60° to the horizontal.
13. A wave-motion system according to claim 1 , wherein the base is constituted by a single block of material.
14. A method of constructing a wave-motion reducing system, comprising the steps of:
providing a plurality of wave-motion reducing means, each wave-motion reducing means comprising a base and a panel,
arranging the wave-motion reducing means in a row lengthwise such that the respective panels adopt a substantially parallel configuration and oppose the wave-motion of a sea current, and
arranging a plurality of said rows side by side with respective panels of each row arranged side by side with one another to form a plurality of continuous panels.