Seawalls and methods for making seawalls are disclosed. A seawall may include a concrete footing, with a first plurality of anchorages disposed in the concrete footing. A plurality of precast concrete tee beams may include single-tee beams and/or double-tee beams. Flanges of the tee beams may be positioned to form seaward and landward faces of the wall, and stems of the tee beams may be coupled to the footing between the seaward and landward faces. A second plurality of anchorages may be disposed at tops of the stems. Elongate steel components extend through the stems, and are tensioned between the first plurality of anchorages and the second plurality of anchorages. Interior fill may be disposed between the seaward and landward faces. One or more wave deflectors may be disposed above the tee beams.

A system for impeding shore erosion includes a sea-facing barrier wall penetrated by large holes that allow water with entrained sand to enter the apparatus. Smaller holes provided in a rear wall allow the water to drain into an underlying reservoir after the entrained sand has settled. An extension can be abutted to a top of the barrier wall to enhance sand collection during a storm. Water that flows over the barrier wall is caused to flow over a top of the extension, whereby water with entrained sand falls through openings in the extension top. Sand collected by the extension remains on the shore when the extension is removed. The apparatus can include plywood, metal, or plastic. Embodiments can be disassembled and/or folded for transport and storage. Internal reinforcing partition walls can extend between the barrier and rear walls. The apparatus can be further anchored by stakes.

A system for impeding shore erosion includes a sea-facing barrier wall penetrated by large holes that allow water with entrained sand to enter the apparatus. Smaller holes provided in a rear wall allow the water to drain into an underlying reservoir after the entrained sand has settled. An extension can be abutted to a top of the barrier wall to enhance sand collection during a storm. Water that flows over the barrier wall is caused to flow over a top of the extension, whereby water with entrained sand falls through openings in the extension top. Sand collected by the extension remains on the shore when the extension is removed. The apparatus can include plywood, metal, or plastic. Embodiments can be disassembled and/or folded for transport and storage. Internal reinforcing partition walls can extend between the barrier and rear walls. The apparatus can be further anchored by stakes.

In summation, the invention is a design to connect float modules (2) to each other and/or to assembly units and/or to the superstructure. In a preferred embodiment, the invention is applied for pontoons (1) constructed of concrete float modules (2), where prismatic float modules (2) minimally include a monolithic upper plate (3), side walls (4) and/or frame units (6) arranged along the edges (5) of the float module (2) and float modules (2) are fixed to each other by means of longitudinal tension units (15) led through said float modules (2). For tension units (15), boreholes (8) are created in the side walls (4) or the frame units (6) of the float module (2) minimum at the edges (5) of the upper plate of the prism, intersecting the prism and running parallel with the edges (5). In particular cases, directional recesses (14) are created around the exit holes (9) of boreholes (8) with skew axes (Tx, Ty, Tz), running in different directions and meeting in the corners of float modules (2). Into the directional recesses (14) between the float modules (2), resilient directional spacers (16) are inserted. Directional spacers (16) have boreholes that contain the relevant tension units (15). In present invention, at least the surfaces with the boreholes (8) for the tension units (15) are equipped with rigid corner elements (11) at the corners of the float module (2) where the impact resistance and compressive strength of the material of the corner elements (11) exceed those of the material of the float module (2); boreholes (13) are created for the exit holes (9) in the corner elements (11); the directional recesses (14) sunk into corner elements (11) are shaped as truncated cones tapering inwards and the envelope of directional spacers (16) has the same shape as that of the directional recess (14), two truncated cones with their bases facing each other.

A shoreline protection dike includes a plurality of juxtaposed protection devices each including a front face which is curved so as to deflect the water from each wave upwards and back in the direction of ebbing. The front face includes a concave curved shape formed by lines parallel to one another and extending between lower and upper edges of the front face, each line resting on a curved line which extends in a plane perpendicular to the lower and upper edges, the curved line including a first sector which forms a first arc and at least a second sector which forms a second arc.

A shoreline protection dike includes a plurality of juxtaposed protection devices each including a front face which is curved so as to deflect the water from each wave upwards and back in the direction of ebbing. The front face includes a concave curved shape formed by lines parallel to one another and extending between lower and upper edges of the front face, each line resting on a curved line which extends in a plane perpendicular to the lower and upper edges, the curved line including a first sector which forms a first arc and at least a second sector which forms a second arc.

A transportable wave suppressor and sediment collection system for suppressing wave action along the shore of a body of water, which includes a plurality of interconnected sections, each section including a base, a forward wall, and a rear wall, and having a plurality of flow pipes extending from the forward wall to the rear wall, and further including a plurality of shelves on the forward wall for dispersing wave energy, while redirecting and using the wave energy to allow water and sediment to flow into the flow pipes and for collecting sediment that is not carried into the flow pipes and settles on the shelves for being contacted by a following wave to carry the sediment into the flow pipes. In some deeper water embodiments, the sections may include a base portion, a top portion and one or more spacer portions to enable raising or changing the height of the system.

A transportable wave suppressor and sediment collection system for suppressing wave action along the shore of a body of water, which includes a plurality of interconnected sections, each section including a base, a forward wall, and a rear wall, and having a plurality of flow pipes extending from the forward wall to the rear wall, and further including a plurality of shelves on the forward wall for dispersing wave energy, while redirecting and using the wave energy to allow water and sediment to flow into the flow pipes and for collecting sediment that is not carried into the flow pipes and settles on the shelves for being contacted by a following wave to carry the sediment into the flow pipes. In some deeper water embodiments, the sections may include a base portion, a top portion and one or more spacer portions to enable raising or changing the height of the system.

Disclosed is a fast-laid floating breakwater, which belongs to the field of ocean engineering and includes a foldable net cage, box-type rubber airbags, a counterweight system and a mooring system. The foldable net cage includes frames and a flexible net, and the frames divide the net cage into cabins. An air valve is provided at the upper part of each box-type rubber airbag and connected to the net, and the airbags are fixed in the cabins. The counterweight system is provided at the bottoms of the frames. The mooring system includes pull rings, mooring chains and anchors; the pull rings are connected to two sides of the lower end of each frame. The immersion depth of the breakwater can be regulated through weights of the frames and the counterweights, thereby fastening the breakwater laying.

A system and method for maintaining a connection between a floating dock and a fixed piling during a flood event. The system includes a piling sleeve that is adapted to telescopically and slidably fit over and around a fixed piling, wherein the piling is fixed into the ground below the surface of the water, and extends upwardly through an opening in a floating dock. The piling sleeve includes a catch mechanism attached to an upper portion of the piling sleeve. The catch mechanism is designed to “catch” or engage the floating dock when the dock rises with the water to a pre-determined level. The piling sleeve may freely slide upwardly and downwardly with respect to both the piling and floating dock, and when flood waters rise, the catch mechanism causes the sleeve to rise with the dock while maintaining an extended connection to the piling.