JP2014043754A - Offshore undersea breakwater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an offshore wave dissipating breakwater for preventing corrosion and washout of a coast and damage on fishery facilities and coastal facilities due to wind-wave under a severe oceanographic condition without current-transforming (meandering) or shielding an ocean current(tidal current).SOLUTION: Foundation piles 5 are driven into a sea bottom surface of an area for installing an offshore wave dissipating breakwater; height adjustment leg bases 4 for installing a base plate 3 are set and fixed at an undersea position above the sea bottom; moreover, three circular cylinders 2 are assembled into a triangular pyramid leg on the base plate 3 of a foundation structure type in which the base plate 3 and the height adjustment leg bases 4 are assembled together; a hemispherical body 1 is arranged on an apex of each of a plurality of triangular pyramid legs to form wave dissipating blocks; and the wave dissipating blocks are assembled vertically and horizontally to construct the offshore wave dissipating breakwater of integrated structure.

Description

  The present invention relates to an offshore underwater wave fire breakwater of the present invention.

  In order to prevent erosion due to wind waves, ocean currents (tides), etc., and erosion damage due to rip currents, the national land of Japan, which is an island country surrounded by the sea on all sides, is a national project from the viewpoint of national land conservation. Polymorphic breakwaters and breakwaters have been constructed.

The basic foundation method at the beginning of the construction of the conventional breakwater and breakwater is the method of laying cobblestones, quarry stones, etc. on the bottom floor with the sea bottom leveled, the stone laying method with these stones put in a wire mesh, and the soft geological countermeasure method later The foundation floor has been maintained and constructed using various methods such as the sand mat method, asphalt mat method, train mat method, and top block block method, which were developed one after another.
(See Patent Documents 1 and 2)

  The place where the conventional breakwater has been installed is basically stacked in piles in close contact with various embankment members such as various types of wave-dissipating blocks on the foundation floor constructed by the method described in 0003. Due to the construction method, there is no choice but to build a shallow shallow water, and the bottom floor liquefied by wind wave scouring under severe sea conditions has caused sliding settlement and collapse due to runoff due to rip currents, etc. .

  In addition, as a result of the construction of the offshore dyke, sea current (tide) changes (meandering), erosion and loss to the new coast, damage to coastal facilities, etc. There are many burial cases in various places where the original functional purpose has not been achieved.

Japanese Patent Laid-Open No. 7-252813 JP 2004-244974 (P2004-244974A)

This invention is a regular integrated structure effective for reducing and eliminating the wave force caused by wind waves and waves, in view of the actual condition of the breakwater pier and the breakwater constructed by the conventional wave-dissipating block and the embankment method. The purpose of this project is to provide a solid underwater wave fire breakwater that creates a wide range of good sea areas by eliminating the causes of coastal unlandscapes, inconvenience, and various damages.

  The present invention deploys a base plate on the height adjustment platform on which the height adjustment platform is placed so as to be positioned in the sea above the bottom surface of the foundation pile on which the foundation pile is placed on the bottom surface of the installation sea area. In addition, as a solid offshore type underwater wave fire wave dam with an integrated structure in which a large number of wave-dissipating blocks forming a hemisphere at each end of a tripod on the base plate are vertically and horizontally combined. The problem is solved.

  The present invention provides a height adjustment platform for placing a base pile on the sea bottom of the installation sea area for constructing the foundation structure of the wave fire breakwater of the present invention and for installing a base plate at a position in the sea above the sea bottom. By placing the base plate on the pile and fixing it together in an integrated structure, there is no need to subsidize the submarine construction work that prevents large-scale subsidence even in soft geological zones without being constrained by restrictions such as water depth and seafloor topography and geology. It is a basic structure that requires cost reduction such as construction costs and maintenance costs.

  The wave-dissipating block of the offshore underwater wave fire breakwater of the present invention applies the infinite reflection directionality of the wind wave at the time of stormy weather and stirs the wave forces reversed from each circular block colliding with each other. The reinforced concrete wave-dissipating block according to the present invention has a structure in which the destructive force caused by the energy of wind waves is reduced and eliminated to bring it into a saturated state.

  The present invention describes the inner sea area of the wave fire wave dam with an integrated structure in which a plurality of wave-dissipating blocks as described in 0010 are combined vertically and horizontally on the base plate of the shore-breaking underwater wave fire wave dam described in 0009. ) Inflow and inflow without interruption (smoothness) and keeps the same water quality environment as the open ocean, and creates a good and wide-range sea area that is not damaged by wind waves during stormy weather.

  The present invention is improved by eliminating the cause of other damages caused by wind waves and waves, as well as unlandscape and inconvenience on the coast where the breakwater pier and breakwater were built by the conventional construction method. This is an offshore underwater wave fire breakwater of the present invention that has an effective integrated structure, and the conventional offshore breakwater becomes unnecessary by constructing the offshore underwater wave fire breakwater of the present invention.

Outline perspective view of the offshore underwater wave fire breakwater of the present invention Basic type perspective view of a reinforced concrete wave-dissipating block of the present invention Combination outline perspective view of reinforced concrete wave-dissipating block of the present invention Outline sectional view of the offshore wave firefighting pier of the present invention

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a rip-off type wave firefighting pier according to the present invention will be described below according to examples shown in the drawings.

  FIG. 1 and FIG. 4 are diagrams showing an overall view of a shore breaker type firefighting pier according to the present invention, in which a foundation pile 5 is placed on the sea bottom 6 of the sea area to be installed, and the base is located at a position in the sea above the sea floor. The height adjustment table 4 for installing the plate 3 is fixed on the foundation pile 5, and the height adjustment table 4 and the base plate 3 are assembled and fixed in an integrated structure to prevent subsidence. 1 and FIG. 1 are combined with a large number of reinforced concrete hemispherical wave-dissipating blocks 1 shown in FIG. 2 on a base plate 3 of a basic structure type that does not block or flow (meander). As shown in FIG. 4, this is a firm offshore underwater wave fire breakwater of the present invention which is arranged vertically and horizontally and is regularly assembled and formed into an integral structure to a predetermined scale.

  The formation of the wave-dissipating block is a diagram based on a regular triangle in which three cylinders 2 are assembled in a leg shape of regular triangle, each of which has a hemispherical wave-dissipating block 1 at its apex, 3 is a wave-dissipating block made of reinforced concrete according to the present invention having a structure in which the shape of a right circular cylinder shown in FIG. 2 can be changed to a curved circular cylinder.

  A cylindrical convex trapezoid is formed at the center of the hemispherical upward circular plane of the basic wave-dissipating block 1 shown in FIGS. 2A and 2B, and a concave circular trapezoidal coupling is formed on the hemispherical downward circular plane. 3 is a reinforced concrete wave-dissipating block according to the present invention which can be assembled and assembled as shown in FIGS.

  The wavy line 8 shown in FIG. 4 is a state in which the sea wave (tidal current) flows into the inner sea area of the wave firefighting dam while the wavy waves pushed toward the wave firefighting quay from the direction of the arrow 9 indicating the offshore direction disappear by the wave-dissipating block of the present invention. The sea level horizon 7 is a schematic cross-sectional view of the offshore wave firefighting pier according to the present invention, showing a calm sea surface state.

  The inner sea area where the offshore underwater wave fire breakwater of the present invention is installed creates artificial dredging in the sandy sea that was not considered by conventional common sense, such as development of large-scale oceanic aquaculture business and other fishery development, The development of the aquaculture industry double business of salmon, sea urchin and kelp can be expected.

Future energy policy issues in Japan include coal, fossil-fired thermal power generation, and hydroelectric power generation as a whole. Especially, the shift from dependence on nuclear power generation to various renewable energies is the most important energy issue as a national policy project. is there.
One solution to the problem of renewable energy is to develop an offshore wind power generation project on a large scale and at low cost in the inner area of the breakwater where the offshore underwater wave firefighting pier of the present invention is installed. It is possible.

  In the past, many public works projects, such as offshore pons and breakwater construction, have had a low economic effect and have not been able to obtain profits that match the investment amount. By doing so, the local economy and local production for local consumption associated with the development of renewable energy and new business development can be expected to have economic effects commensurate with public investment and further promote the improvement of depopulation problems.

DESCRIPTION OF SYMBOLS 1 Hemispherical wave-dissipating block 2 Cylinder 3 Base plate 4 Height adjustment footrest 5 Foundation pile 6 Sea bottom 7 Sea surface horizontal line 8 Wavy line 9 Offshore direction arrow 10 Bolt

Claims (1)

  Place a foundation pile on the bottom of the sea in the installation sea area, place a height adjustment base on the foundation pile so that it is located in the sea above the sea bottom, and deploy a base plate on the height adjustment base, An offshore underwater wave fire breakwater comprising a plurality of wave-dissipating blocks that are combined with each other vertically and horizontally on the base plate to form a hemisphere on each end of a tripod.

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