A seawall comprising a base with a top, a plurality of extensions on the top of the base, and an adhesive or sealant securing the extensions to the base. Each extension comprises a plurality of spaced apart rubber poles extending generally in a direction horizontal to the sea floor, and an outer rubber covering surrounding the poles. A method of increasing the height of a seawall comprising the steps of placing a plurality of the extensions on top of the seawall with the poles extending substantially parallel to the sea floor, and securing the extensions to the top of the seawall.

A seawall comprising a base with a top, a plurality of extensions on the top of the base, and an adhesive or sealant securing the extensions to the base. Each extension comprises a plurality of spaced apart rubber poles extending generally in a direction horizontal to the sea floor, and an outer rubber covering surrounding the poles. A method of increasing the height of a seawall comprising the steps of placing a plurality of the extensions on top of the seawall with the poles extending substantially parallel to the sea floor, and securing the extensions to the top of the seawall.

A dock stabilizing pile guide device includes a frame attached to a floating dock and enclosing a respective piling. The frame carries a plurality of rollers that rotatably interengage the piling and guide the dock upwardly and downwardly along the piling as the depth of the underlying water changes.

A tsunami-wave structure is provided for installation in the bottom of the sea/ocean in the near-shore area which is exposed to the air at the time of a low tide that precedes the arrival of tsunami. Normally, the structure is immersed in water and when exposed to air before arrival of the tsunami wave assumes a tsunami-wave dampening position under the effect of its own gravity. This is achieved by making the structure in the form of a two-lever mechanism having two lever arms separated by a fulcrum point with a counterweight attached to the end of one the lever arms and a tsunami-wave breaker pivotally connected to the end of the other lever arm so that when the structure is exposed to the air the tsunami-wave breaker is turned down and allows the counterweight to outweigh the tsunami-wave breaker and to raise it to the operation position.

A tsunami-wave structure is provided for installation in the bottom of the sea/ocean in the near-shore area which is exposed to the air at the time of a low tide that precedes the arrival of tsunami. Normally, the structure is immersed in water and when exposed to air before arrival of the tsunami wave assumes a tsunami-wave dampening position under the effect of its own gravity. This is achieved by making the structure in the form of a two-lever mechanism having two lever arms separated by a fulcrum point with a counterweight attached to the end of one the lever arms and a tsunami-wave breaker pivotally connected to the end of the other lever arm so that when the structure is exposed to the air the tsunami-wave breaker is turned down and allows the counterweight to outweigh the tsunami-wave breaker and to raise it to the operation position.

A movable tsunami buffer dam has a unit configured such that a plurality of separate units, each of which having a shape in which a frame made of a light material is sandwiched by a pair of plates made of a light material, is stacked with said plates disposed in a pile; and a locking member for locking said unit to a ground surface such that said unit can rise up from said ground surface and collapse onto said ground surface. The separate units has a structure in which water from a tsunami can advance into a space formed between said plates by said frame.

A required thickness is ensured due to said unit being configured such that said separate units are stacked, and the manufacturing cost is reduced to a greater extent than in the case of a dam configured from a single separate unit of said required thickness, because the big size lumber for obtaining the units is very expensive. The unit is installed in a state of being collapsed on said ground surface at normal times, and when a tsunami arrives, said unit rising up due to the force of the tsunami and the buoyancy of the seawater, resisting the passage of the tsunami and reducing the power of the tsunami.

A movable tsunami buffer dam has a unit configured such that a plurality of separate units, each of which having a shape in which a frame made of a light material is sandwiched by a pair of plates made of a light material, is stacked with said plates disposed in a pile; and a locking member for locking said unit to a ground surface such that said unit can rise up from said ground surface and collapse onto said ground surface. The separate units has a structure in which water from a tsunami can advance into a space formed between said plates by said frame.

A required thickness is ensured due to said unit being configured such that said separate units are stacked, and the manufacturing cost is reduced to a greater extent than in the case of a dam configured from a single separate unit of said required thickness, because the big size lumber for obtaining the units is very expensive. The unit is installed in a state of being collapsed on said ground surface at normal times, and when a tsunami arrives, said unit rising up due to the force of the tsunami and the buoyancy of the seawater, resisting the passage of the tsunami and reducing the power of the tsunami.

Disclosed are wave dissipation systems, modular units for use in wave dissipation systems and methods of constructing the same. Embodiments of the present disclosure are directed to the construction of breakwater systems using a plurality of modular elements which can be interlocked to form an elongated breakwall. Each module unit includes a base unit and a lid element. The base unit has a bottom wall, a rear wall, laterally opposed side walls and a front wall which in combination define an energy dissipation chamber. The lid element covers the energy dissipation chamber of the base unit and is disposed on top of the base unit at angle with respect to the bottom wall.

Disclosed are wave dissipation systems, modular units for use in wave dissipation systems and methods of constructing the same. Embodiments of the present disclosure are directed to the construction of breakwater systems using a plurality of modular elements which can be interlocked to form an elongated breakwall. Each module unit includes a base unit and a lid element. The base unit has a bottom wall, a rear wall, laterally opposed side walls and a front wall which in combination define an energy dissipation chamber. The lid element covers the energy dissipation chamber of the base unit and is disposed on top of the base unit at angle with respect to the bottom wall.

A flexible dock connector for connection between two floating dock structures. In example forms, the flexible dock connector includes a first eye bolt, a second eye bolt, a dampening material and a pair of plates. The first and second eye bolts include an eye portion and a bolt portion extending from the eye portion. The eye portions of the first and second eye bolts are coupled together, and the dampening material substantially covers the eye portions of the first and second eye bolts. The pair of plates each include a central opening for receiving the bolt portions of the first and second eye bolts, respectively, and wherein the dampening material is generally sandwiched between the pair of plates.