Method of forming an elevation partially or entirely under water, an elevation formed by this method and a boundary means to be used for the formation of the elevation

摘要

The invention relates to a method of constructing an underwater dam or other elevation by depositing sand fed under pressure. To that end a water-permeable, but sandtight membrane (1, 19) is placed on the seabed (2). The membrane (1, 19) is placed on the seabed (2) at a sharp angle therewith, which angle approximately corresponds to the angle of inclination of the natural slope of the dam. The method according to the invention is particularly suitable to be used for constructing an artificial island.