Abstract: Disclosed is a crest element in an armor layer assembly of a breakwater. The crest element includes: a central part; two wings extending from the central part in opposing directions along, when placed on a breakwater, the length direction of the breakwater; and a nose extending from the central part in a forward direction transverse to the length direction of the breakwater. The backside of the central part is a vertically oriented, back face facing in a backward direction opposite to the forward direction. The crest element may in particular be used as crest element for armor layers including armor elements of the type having a central part from which: two wings extend in opposing directions, and a tail and nose extend in opposing directions transverse to the direction of extension of the wings. Also disclosed is an armor layer, a breakwater and methods using the crest elements.

Abstract: Disclosed is a crest element in an armor layer assembly of a breakwater. The crest element includes: a central part; two wings extending from the central part in opposing directions along, when placed on a breakwater, the length direction of the breakwater; and a nose extending from the central part in a forward direction transverse to the length direction of the breakwater. The backside of the central part is a vertically oriented, back face facing in a backward direction opposite to the forward direction. The crest element may in particular be used as crest element for armor layers including armor elements of the type having a central part from which: two wings extend in opposing directions, and a tail and nose extend in opposing directions transverse to the direction of extension of the wings. Also disclosed is an armor layer, a breakwater and methods using the crest elements.

Abstract: Disclosed is a concrete cover element for a breakwater or jetty construction. The cover element includes a plate portion and two noses. The plate portion lies in the xy-plane and has a thickness. The two noses project in opposite directions from the plate portion and form a single part with the plate portion. The plate portion is to be imagined as being formed from a quadrangular plate whose two opposite plate edges are incised in the middle to form a plate recess, and whose corners located on the first plate diagonal are both cut off along a first secant. The plate portion has a first dimension measured along the first plate diagonal and a second dimension measured along the second plate diagonal. The first dimension is smaller than the second dimension.

Abstract: Disclosed is a concrete cover element for a breakwater or jetty construction. The cover element includes a plate portion and two noses. The plate portion lies in the xy-plane and has a thickness. The two noses project in opposite directions from the plate portion and form a single part with the plate portion. The plate portion is to be imagined as being formed from a quadrangular plate whose two opposite plate edges are incised in the middle to form a plate recess, and whose corners located on the first plate diagonal are both cut off along a first secant. The plate portion has a first dimension measured along the first plate diagonal and a second dimension measured along the second plate diagonal. The first dimension is smaller than the second dimension.

Abstract: A water-retaining element (2) for forming a temporary water-retaining structure (1) includes a bottom (6), a plurality of side walls (8, 10), and connections (20). The plurality of side walls are immovably connected to the bottom and extend upwards from the bottom to form a water-fillable container (12). The connections connect the water-retaining element in a water-retaining manner to least one adjacent water-retaining element. The water-fillable container (12) is open at the top to receive a second water-retaining element (2) during transport and/or storage.

Abstract: A protective element for a breakwater or wave-retarding construction comprises a body that has at least two opposing projections. The projections are on either side of a flat base and extend transversely thereto. The periphery of the base is non-circular, so that rolling of the protective element under the influence of the beating of the waves is resisted.

Abstract: A wave protection structure is intended for a slope, such as the slope of a breakwater or a bank, which slope merges into a bed at the location of a toe. The wave protection structure comprises wave protection elements and toe elements. The wave protection elements are each provided with a plurality of projections for engaging in one another and are provided on the slope in a substantially regular imaginary grid, with a horizontal grid spacing between the centers of gravity of the wave protection elements. The toe elements extend along the toe and their shape differs from the shape of the wave protection elements. The centers of gravity of the toe elements are provided at substantially the horizontal grid spacing from one another. As a result of the toe elements being provided at the grid spacing of the wave protection elements, it is easier to position the toe elements. This also allows the use of larger blocks and means that it is no longer necessary to stack the wave protection elements.

Abstract: A water-retaining element (2) for forming a temporary water-retaining structure (1) comprises a bottom (6), a plurality of side walls (8, 10), and connecting means (20). The plurality of side walls are immovably connected to the bottom and extend upwards from the bottom to form a water-fillable container (12). The connecting means are designed to connect the water-retaining element in a water-retaining manner to least one adjacent water-retaining element. The water-fillable container (12) is open at the top to receive a second water-retaining element (2) during transport and/or storage.

Abstract: A wave protection structure is intended for a slope, such as the slope of a breakwater or a bank, which slope merges into a bed at the location of a toe. The wave protection structure comprises wave protection elements and toe elements. The wave protection elements are each provided with a plurality of projections for engaging in one another and are provided on the slope in a substantially regular imaginary grid, with a horizontal grid spacing between the centres of gravity of the wave protection elements. The toe elements extend along the toe and their shape differs from the shape of the wave protection elements. The centres of gravity of the toe elements are provided at substantially the horizontal grid spacing from one another. As a result of the toe elements being provided at the grid spacing of the wave protection elements, it is easier to position the toe elements. This also allows the use of larger blocks and means that it is no longer necessary to stack the wave protection elements.

Abstract: A protective element for a breakwater or wave-retarding construction comprises a body that has at least two opposing projections. The projections are on either side of a flat base and extend transversely thereto. The periphery of the base is non-circular, so that rolling of the protective element under the influence of the beating of the waves is resisted.