JP2615403B2 - Wave height attenuation device by flapboard - Google Patents
Wave height attenuation device by flapboardInfo
- Publication number
- JP2615403B2 JP2615403B2 JP30749792A JP30749792A JP2615403B2 JP 2615403 B2 JP2615403 B2 JP 2615403B2 JP 30749792 A JP30749792 A JP 30749792A JP 30749792 A JP30749792 A JP 30749792A JP 2615403 B2 JP2615403 B2 JP 2615403B2
- Authority
- JP
- Japan
- Prior art keywords
- wave height
- flapboard
- wave
- flap board
- attenuation device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Revetment (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、港湾における外郭施設
又は海岸における海岸保全施設としての利用に供するフ
ラップボードによる波高減衰装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wave height attenuating device using a flap board for use as an outer facility in a harbor or a coastal preservation facility on a shore.
【０００２】[0002]
【従来の技術】近年、港湾および海岸、海浜地域は市民
のための快適で潤いのある憩いの場としての役割が再認
識されている。現在そのための施策としてマリーナ、人
工ビーチ等が注目されてきている。マリーナにおいては
プレジャーボートの保管、保留のスペースとしての静穏
な海域の確保のため、防波堤等で海域を囲む方法が用い
られており、人工ビーチにおいては砂浜の安定のため、
沖合に離岸堤を設置して波浪の減殺が計られていた。又
堤体上で砕波を発生させ波のエネルギーを消散する異形
ブロック等を使用した透過物等が使用されていた。2. Description of the Related Art In recent years, the role of harbors, shores, and beaches as recreational and comfortable places for citizens has been re-recognized. Currently, marina, artificial beaches, etc. are attracting attention as measures for that. In the marina, the method of surrounding the sea area with breakwaters etc. is used for the storage of pleasure boats and for securing a calm sea area as a holding space, and for the stability of sandy beaches on artificial beaches,
An offshore breakwater was set up to reduce waves. In addition, a permeate using a deformed block or the like that generates wave breaking on the embankment body and dissipates wave energy has been used.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記の
方法では海に面する陸上からの視野を遮り、港湾や海浜
における景観を害するとともに、船の操舵も制限を受け
ることになる。又湾内は閉鎖性の海域となるため、海水
交換性能の低下に伴う水質の悪化や湾内水位の上昇、お
よびこれによって引き起こされる底層流の増大による砂
浜の浸食といった環境問題が生じていた。However, in the above-mentioned method, the view from the land facing the sea is obstructed, the scenery in the harbor and the beach is hindered, and the steering of the ship is also restricted. Also, since the bay is a closed sea area, environmental problems such as deterioration of water quality due to deterioration of seawater exchange performance, rise of water level in the bay, and erosion of the sandy beach caused by an increase in bottom flow caused by this have occurred.
【０００４】本発明は上記の点に鑑み考察されたもので
あって、波浪の減衰作用を得るために弾性又は浮力によ
る復元力をもった素材を用いた波浪制御海域構造物を提
供することを目的とするものである。The present invention has been made in view of the above points, and an object of the present invention is to provide a wave control marine structure using a material having a restoring force due to elasticity or buoyancy in order to obtain a wave damping action. It is the purpose.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
の本発明の要旨とするところは、フラップボード自体の
動きによって発生する波動と入射波との干渉作用、フラ
ップボード群の内部での渦又は乱れの起生による波のエ
ネルギーの消費、フラップボードが撓む為に消費される
波のエネルギー消費を特徴とするものである。SUMMARY OF THE INVENTION In order to achieve the above object, the gist of the present invention is to provide an interference action between a wave generated by the movement of the flap board itself and an incident wave, and a vortex inside the flap board group. Alternatively, it is characterized by energy consumption of waves due to occurrence of turbulence, and energy consumption of waves consumed by bending of the flap board.
【０００６】[0006]
【作用】以上のごとく構成された本発明のフラップボー
ド装置は弾性板を多数直立させている構成のため透水性
が高く、海水交換機能が著しく良くなる。又水産的な面
からも魚類にとって生息しやすい環境を提供する。更に
天端が水面下にある没水構造のため陸上からの景観を損
なわない。尚、本発明では上記構造のフラップボードを
海底に固定する方法として、基台に取り付ける方法や杭
のような根入れによる支持の方法が考えられるが、ここ
ではフラップボードの設置方法、および構成される素材
について限定されるものではない。The flapboard apparatus of the present invention constructed as described above has a structure in which a number of elastic plates are erected, so that the water permeability is high and the seawater exchange function is remarkably improved. It also provides an environment where fish can easily live in terms of fisheries. Furthermore, the view from the land is not impaired due to the submerged structure where the top is below the water surface. Incidentally, in the present invention, as a method of fixing the flapboard having the above structure to the seabed, a method of attaching to a base or a method of supporting by embedding such as a pile can be considered. The material is not limited.
【０００７】[0007]
【実施例】以下、本発明の実施例を図面に基づいて説明
する。図１は発明の一実施例を示す斜視図で、図２は平
面図である。図３〜図６は水理模型実験の結果を示す図
である。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of the present invention, and FIG. 2 is a plan view. 3 to 6 are diagrams showing the results of hydraulic model experiments.
【０００８】フラップボードの波浪減衰性能を決定する
要因としては、フラップボードの形状、設置位置、波浪
条件が挙げられる。以下にフラップボードの水理特性を
水理模型実験において説明する。Factors that determine the wave attenuation performance of the flap board include the shape, installation position, and wave conditions of the flap board. Hereinafter, the hydraulic characteristics of the flapboard will be described in a hydraulic model experiment.
【０００９】フラップボードの形状は、断面形状、長
さ、天端水深、設置密度、設置延長で決定されるもので
ある。今回の実験においてはフラップボードの模型は硬
質ゴムを使用し、長さは現地において３ｍ、厚み６ｃ
ｍ、幅６０ｃｍの内部にピアノ線を入れ剛性を強くして
いる。天端水深は水面に近くする程波高減衰効果が発揮
され、実験では水面下２ｍのものと比較すると、４０ｃ
ｍのものが効果が大きくなった。設置密度は高くするほ
ど効果があるものの、一定の密度以上は変わらなくな
る。実験においては、０、６４本／ｍ２（現地換算）と
した。[0009] The shape of the flap board is determined by the cross-sectional shape, length, top water depth, installation density, and installation extension. In this experiment, the model of the flapboard used hard rubber, the length was 3m on site and the thickness was 6c.
A piano wire is inserted inside the m, 60 cm wide to increase rigidity. The wave height attenuating effect is exerted as the top water depth is closer to the water surface.
m increased the effect. The higher the installation density is, the more effective it is, but it does not change beyond a certain density. In the experiment, it was set to 0, 64 lines / m 2 (local conversion).
【００１０】設置延長は、長くするほど効果は上がる
が、図６に示すように入射波高はフラップボードの設置
上で延長方向にほぼ指数的に減少し、使用にあたっては
必要とする波高減衰効果によって設置延長の選定が可能
である。実験においては、現地３０ｍの設置延長で透過
率（透過波高と入射波高の波高比）が、０．４以下が得
られている。フラップボードの設置位置は、設置方法に
よっては水深の深いところでも可能である。減衰条件に
関しては、波の周期に対する効果の違いはあまりなく、
今回の実験では周期４．５〜６．７ｓｅｃにおいてほぼ
一定した波高減衰特性を持つことが確認された。波高に
関しては、波高が大きくなるほど、天端水深と水面との
距離が相対的に小さくなり波高減衰効果が増大する。Although the effect of the installation extension increases as the length increases, the incident wave height decreases almost exponentially in the extension direction when the flapboard is installed as shown in FIG. Installation extension can be selected. In the experiment, the transmittance (the ratio of the transmitted wave height to the incident wave height) of 0.4 or less was obtained by extending the installation at 30 m on site. Depending on the installation method, the flap board can be installed at a deep place. Regarding the damping condition, there is not much difference in the effect on the wave period,
In this experiment, it was confirmed that the sample had a substantially constant wave height attenuation characteristic in a period of 4.5 to 6.7 sec. As for the wave height, as the wave height increases, the distance between the top water depth and the water surface becomes relatively small, and the wave height damping effect increases.
【００１１】港内の水位の上昇に関しては、閉鎖性の防
波堤や潜堤では、水位上昇が問題となる事例が多いのに
対し、実験によるとフラップボード装置は図４及び図５
に示すように、フラップボード無しの状態における水位
上昇とほぼ同じ結果が得られ、フラップボード上では水
位上昇が起きないことが確認された。Regarding the rise of the water level in the port, there are many cases where the rise of the water level poses a problem in closed breakwaters and submerged breakwaters.
As shown in the figure, almost the same result as the rise in the water level without the flap board was obtained, and it was confirmed that the rise in the water level did not occur on the flap board.
【００１２】[0012]
【発明の効果】以上説明してきた如く本発明の使用によ
り、美観・景観に対して水没型のため構造物の存在を感
じさせず、周辺景観をそのまま保つことができる。又構
造物は水面下に没しており、材料が弾性のあるゴム等で
作られているため、特にヨットのセンターボードに当た
っても自在に変形するため船に損傷を与えない。人工海
浜の前面に設置する場合、本発明は水面上昇が生じるこ
と無く、又フラップボード内では水は自由に通過するた
め、人工ビーチ内に水流が発生しにくく、海洋レジャー
の安全が保たれる。又海水の透過性に優れているため、
海水交換性能が高く、港内の水質を保全できる。同時に
漁礁的な機能を持ち、水産的な効果が期待できる等、多
大な効果を奏するものである。As described above, the use of the present invention makes it possible to keep the surrounding landscape as it is because the aesthetic appearance and the landscape do not feel the existence of the structure due to the submerged type. Further, since the structure is submerged under the water surface and made of elastic rubber or the like, the structure is freely deformed even when it hits the center board of the yacht, so that the ship is not damaged. When installed in front of an artificial beach, the present invention does not cause a rise in the water level, and since water freely passes through the flapboard, a water flow hardly occurs in the artificial beach, and the safety of marine leisure is maintained. . Also, because it has excellent seawater permeability,
Seawater exchange performance is high, and the water quality in the port can be preserved. At the same time, it has a reef-like function and can be expected to have a marine effect.
【図１】本発明の一実施例を示す斜視図である。FIG. 1 is a perspective view showing an embodiment of the present invention.
【図２】本発明の一実施例を示す正面図である。FIG. 2 is a front view showing one embodiment of the present invention.
【図３】実験の水路諸元を示す図である。FIG. 3 is a diagram showing waterway specifications of an experiment.
【図４】波高分布、フラップボード有り、無しの比較を
しめす図である。FIG. 4 is a diagram showing a comparison between a wave height distribution and presence / absence of a flap board.
【図５】波高分布、フラップボード有り、無しの比較を
しめす図である。FIG. 5 is a diagram showing a comparison between a wave height distribution, with and without a flap board;
【図６】フラップボードの設置延長に対する透過率を示
す図である。FIG. 6 is a diagram showing the transmittance with respect to the installation extension of the flap board.
１ フラップボード ２ 基台 1 flapboard 2 bases
Claims (1)
する装置を有する帯状の弾性体を流体の移動方向と直角
に複数個直立させたことを特徴とするフラップボードに
よる波高減衰装置1. A wave height attenuating device using a flap board, wherein a plurality of band-shaped elastic bodies having a device for fixing a lower end thereof in a fluid below a surface of the fluid are erected at right angles to a moving direction of the fluid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30749792A JP2615403B2 (en) | 1992-10-05 | 1992-10-05 | Wave height attenuation device by flapboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30749792A JP2615403B2 (en) | 1992-10-05 | 1992-10-05 | Wave height attenuation device by flapboard |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08128024A JPH08128024A (en) | 1996-05-21 |
| JP2615403B2 true JP2615403B2 (en) | 1997-05-28 |
Family
ID=17969800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30749792A Expired - Lifetime JP2615403B2 (en) | 1992-10-05 | 1992-10-05 | Wave height attenuation device by flapboard |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2615403B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6997497B2 (en) * | 2018-01-15 | 2022-01-17 | 芦森工業株式会社 | Tsunami control method and equipment |
-
1992
- 1992-10-05 JP JP30749792A patent/JP2615403B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08128024A (en) | 1996-05-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |