JPH08226113A - Low reflective type floating wave dissipation revetment - Google Patents
Low reflective type floating wave dissipation revetmentInfo
- Publication number
- JPH08226113A JPH08226113A JP7058021A JP5802195A JPH08226113A JP H08226113 A JPH08226113 A JP H08226113A JP 7058021 A JP7058021 A JP 7058021A JP 5802195 A JP5802195 A JP 5802195A JP H08226113 A JPH08226113 A JP H08226113A
- Authority
- JP
- Japan
- Prior art keywords
- wave
- revetment
- float
- floating
- impingement
- 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.)
- Granted
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/11—Hard structures, e.g. dams, dykes or breakwaters
Landscapes
- Revetment (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、浮体式の消波堤に関
し、特に堤体の前面で反射される反射波の低減化をはか
った、低反射型浮体式消波堤に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floating breakwater, and more particularly to a low reflection floating breakwater designed to reduce reflected waves reflected on the front surface of the breakwater.
【0002】[0002]
【従来の技術】従来、浮体式消波堤として、図4(平面
図)および図5(側面図)に示すように、堤体01の複数
基を、各堤体01の長手方向を入射波の進行方向に直角に
なるように、かつ互いに一定間隔を保つように、係留索
3a,3b、シンカー4a,4bを用いて係留して構成
し、進入する波(入射波)2を堤体01によって堤体後方
へ透過することを妨げるようにしたものが提案されてい
る。符号6は平水面,符号10は透過波,符号11は水底を
示す。ここで、堤体01は、平面視長方形の浮体構造体で
形成されている。2. Description of the Related Art Conventionally, as a floating body type breakwater, as shown in FIG. 4 (plan view) and FIG. 5 (side view), a plurality of dam bodies 01 are arranged in the longitudinal direction of each dam body 01. The mooring lines 3a and 3b and the sinkers 4a and 4b are moored so as to be at right angles to the traveling direction and to keep a constant distance from each other. It has been proposed to prevent this from penetrating to the rear of the bank. Reference numeral 6 indicates a flat water surface, reference numeral 10 indicates a transmitted wave, and reference numeral 11 indicates a water bottom. Here, the bank 01 is formed of a floating body structure having a rectangular shape in plan view.
【0003】[0003]
【発明が解決しようとする課題】ところで、上述のよう
な従来の浮体式消波堤では、同消波堤を透過する波を減
少させることはできるが、堤体の前面が入射波を反射し
進入してきた方向へ反射させることになる。そしてこの
反射波が入射波と干渉しあって大きく乱れた波を造るこ
とになり、付近を航行する漁船等の小型船舶に悪影響を
与え、極端な場合は小型船舶の航行が不可能となるなど
の問題点がある。By the way, in the conventional floating body type breakwater as described above, the wave passing through the breakwater can be reduced, but the front surface of the breakwater reflects the incident wave. It will be reflected in the direction of approach. And this reflected wave interferes with the incident wave to create a greatly disturbed wave, which adversely affects small vessels such as fishing boats sailing in the vicinity, and in extreme cases it becomes impossible to navigate small vessels. There is a problem.
【0004】なお、浮体式消波堤における反射波につい
ては、実験等により、次のような事実が判明している。
すなわち、図6は波周期と反射率(=反射波高/入射波
高)との関係の実験結果を示すもので、図6の実線が図
4,5に示した従来の浮体式消波堤の場合を示してお
り、従来型は波周期が短いほど反射波が大きいことをこ
の実験結果は示している。The following facts have been found about the reflected waves in the floating breakwater by experiments.
That is, FIG. 6 shows the experimental results of the relationship between the wave period and the reflectance (= reflected wave height / incident wave height). The solid line in FIG. 6 is the case of the conventional floating body breakwater shown in FIGS. This experimental result shows that the shorter the wave period, the larger the reflected wave in the conventional type.
【0005】本発明は、従来の浮体式消波堤における上
述のような問題点の解決をはかろうとするもので、堤体
の前面における反射波の発生を抑制した低反射型浮体式
消波堤を提供することを目的とする。The present invention is intended to solve the above-mentioned problems in the conventional floating body type breakwater, and is a low reflection type floating type breakwater which suppresses the generation of reflected waves on the front surface of the body. The purpose is to provide a bank.
【0006】[0006]
【課題を解決するための手段】上述の目的を達成するた
め、本発明の低反射型浮体式消波堤は、浮体式消波堤に
おいて、浮力部を有するとともに平面視長方形に形成さ
れた堤体をそなえ、同堤体の複数基が、各堤体の長手方
向を入射波の進行方向に直角になるように、かつ互いに
一定間隔を保つように係留され、上記堤体の上記入射波
に対向する側に遊水空間部が形成され、同遊水空間部の
上記入射波に対向する前面にスリットが形成されるとと
もに、同遊水空間部の内部にフロートが配設されている
ことを特徴としている。In order to achieve the above object, the low reflection type floating breakwater of the present invention is a floating breakwater having a buoyancy portion and formed in a rectangular shape in plan view. A plurality of groups of the levee body are moored so that the longitudinal direction of each levee body is at right angles to the traveling direction of the incident wave and are kept at a constant interval from each other. A play water space portion is formed on the opposite side, a slit is formed on the front surface of the play water space portion facing the incident wave, and a float is arranged inside the play water space portion. I am trying.
【0007】[0007]
【作用】上述の本発明の低反射型浮体式消波堤では、進
入する波が浮消波堤の入射波側に設けられたスリットを
通り遊水空間部へ入ることにより波くずれを生じる。さ
らにこの波によりフロートが上下することにより波エネ
ルギーの方向が変化する。これらの波くずれおよび波エ
ネルギーの方向の変化により、入射波のエネルギーの吸
収が行なわれ、反射波が減少する。In the above-mentioned low reflection type floating wave breakwater of the present invention, the wave entering the water breaks through the slit provided on the incident wave side of the floating breakwater and enters the water retaining space. Furthermore, the direction of the wave energy changes as the float moves up and down due to this wave. Due to these wave breaks and changes in the wave energy direction, the energy of the incident wave is absorbed, and the reflected wave is reduced.
【0008】[0008]
【実施例】以下、図面により本発明の一実施例としての
低反射型浮体式消波堤について説明すると、図1はその
側面図、図2はその平面図で図1のA−A矢視図,図3
はその正面図で図1のB−B矢視図である。なお図1〜
3中図4,5と同じ符号はほぼ同一の部材を示してい
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A low reflection type floating breakwater as an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side view thereof, and FIG. Figure, Figure 3
FIG. 2 is a front view of the B-B arrow in FIG. 1. 1 to
3, the same reference numerals as those in FIGS. 4 and 5 indicate almost the same members.
【0009】この実施例の浮体式消波堤も、内部に浮力
部としての中空部をそなえるとともに平面視長方形に形
成された堤体5の複数基が、各堤体5の長手方向を入射
波2に直角になるように、かつ互いに一定の間隔を保つ
ように、係留索3a,3b,シンカー4a,4b等を用
いて係留されて、構成されている。堤体5の入射波2に
対向する側に、前面(波入射面)にスリット(格子)7
を有する遊水空間部8が形成され、遊水空間部8の内部
に、4個のフロート9a〜9dが、波(水位)の変化に
より上下方向へ動揺可能に、配設されている。In the floating body type breakwater of this embodiment, a plurality of ridge bodies 5 each having a hollow portion as a buoyancy portion and formed in a rectangular shape in plan view have incident waves in the longitudinal direction of each ridge body 5. It is moored by using mooring lines 3a, 3b, sinkers 4a, 4b, etc. so as to be perpendicular to 2 and keep a constant distance from each other. A slit (grating) 7 is formed on the front surface (wave incident surface) on the side facing the incident wave 2 of the bank body 5.
Is formed, and four floats 9a to 9d are arranged inside the water retention space 8 such that the floats 9a to 9d can sway vertically due to changes in the wave (water level).
【0010】上述の構成において、入射波2は堤体5の
消波効果により減衰した形で透過波10として浮体式消波
堤を通過していく。また入射波2の一部はスリット7を
通り遊水空間部8へ入り、遊水空間部8へ入ることによ
り、波くずれを生じる。さらにこの波によりフロート9
a〜9dが上下して、波エネルギーの方向を変化させ
る。In the above structure, the incident wave 2 passes through the floating breakwater as a transmitted wave 10 in a form attenuated by the wave breaking effect of the bank 5. Further, a part of the incident wave 2 enters the play water space portion 8 through the slit 7 and enters the play water space portion 8 to cause wave waviness. This wave also floats 9
a to 9d move up and down to change the direction of wave energy.
【0011】上述の波のくずれおよび波エネルギーの方
向の変化により、入射波2のエネルギーの吸収が行なわ
れるため、従来のものとほぼ同等の消波効果を保ちなが
ら、反射波を減少させることができる。Since the energy of the incident wave 2 is absorbed by the above-described wave collapse and the change in the direction of the wave energy, the reflected wave can be reduced while maintaining the same wave-dissipating effect as the conventional one. it can.
【0012】図6の点線がこの実施例の低反射型浮体式
消波堤の反射率の実験結果を示している。図6の実験結
果から、この実施例の低反射型浮体式消波堤では、特に
波周期の短い入射波に体して有効であることが理解でき
る。The dotted line in FIG. 6 shows the experimental results of the reflectance of the low reflection type floating breakwater of this embodiment. From the experimental results of FIG. 6, it can be understood that the low-reflection floating-type breakwater of this example is particularly effective for an incident wave having a short wave period.
【0013】[0013]
【発明の効果】以上詳述したように、本発明の低反射型
浮体式消波堤によれば、従来の浮体式消波堤の消波効果
を損なうことなく、反射波を減少させることができる。
これにより入射波と反射波とが干渉しあって大きく乱れ
た波を造ることが少なくなり、付近を航行する船舶等に
悪影響を与えることがなくなる。As described above in detail, according to the low reflection type floating breakwater of the present invention, the reflected waves can be reduced without impairing the wave breaking effect of the conventional floating breakwater. it can.
As a result, the incident wave and the reflected wave interfere with each other and a wave that is greatly disturbed is less likely to be generated, and a ship or the like traveling in the vicinity is not adversely affected.
【図1】本発明の一実施例としての低反射型浮体式消波
堤の平面図。FIG. 1 is a plan view of a low reflection type floating breakwater as an embodiment of the present invention.
【図2】同平面図(図1のA−A矢視図)。FIG. 2 is a plan view of the same (viewed along the line AA in FIG. 1).
【図3】同正面図(図1のB−B矢視図)。FIG. 3 is a front view of the same (a view taken along the line BB of FIG. 1).
【図4】従来の浮体式消波堤の平面図。FIG. 4 is a plan view of a conventional floating breakwater.
【図5】同側面図。FIG. 5 is a side view of the same.
【図6】本発明の浮体式消波堤における反射成績図。FIG. 6 is a reflection performance chart of the floating breakwater of the present invention.
01 堤体 2 入射波(進入波) 3a〜3d 係留索 4a〜4d シンカー 5 堤体 6 平水面 7 スリット 8 遊水空間部 9a〜9d フロート 10 透過波 11 水底 01 Embankment 2 Incident wave (incoming wave) 3a to 3d Mooring line 4a to 4d Sinker 5 Embankment 6 Level surface 7 Slit 8 Reservoir space 9a to 9d Float 10 Transmission wave 11 Water bottom
Claims (1)
をそなえ、 同堤体の複数基が、各堤体の長手方向を入射波の進行方
向に直角になるように、かつ互いに一定間隔を保つよう
に係留され、 上記堤体の上記入射波に対向する側に遊水空間部が形成
され、 同遊水空間部の上記入射波に対向する前面にスリットが
形成されるとともに、同遊水空間部の内部にフロートが
配設されていることを特徴とする、低反射型浮体式消波
堤。1. A floating body type breakwater having a buoyancy portion and a levee body formed in a rectangular shape in plan view, and a plurality of the levee bodies have a longitudinal direction of each levee body in a traveling direction of an incident wave. They are moored so as to form a right angle and keep a certain distance from each other, and a water retaining space is formed on the side facing the incident wave of the bank, and a front surface of the water retaining space facing the incident wave is formed. A low-reflection type floating breakwater, in which a slit is formed and a float is arranged inside the water storage space.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP05802195A JP3244993B2 (en) | 1995-02-22 | 1995-02-22 | Low reflection type floating breakwater |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP05802195A JP3244993B2 (en) | 1995-02-22 | 1995-02-22 | Low reflection type floating breakwater |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH08226113A true JPH08226113A (en) | 1996-09-03 |
JP3244993B2 JP3244993B2 (en) | 2002-01-07 |
Family
ID=13072314
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP05802195A Expired - Fee Related JP3244993B2 (en) | 1995-02-22 | 1995-02-22 | Low reflection type floating breakwater |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3244993B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006335187A (en) * | 2005-06-01 | 2006-12-14 | Mitsubishi Heavy Ind Ltd | Low reflection type wave-dissipating structure for large float |
CN114215004A (en) * | 2021-12-09 | 2022-03-22 | 中交第三航务工程勘察设计院有限公司 | Floating breakwater structure with wave dissipation chamber and wave blocking plate and construction method thereof |
CN114235338A (en) * | 2021-12-17 | 2022-03-25 | 武汉理工大学 | Towing tank wave absorption device |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102587318B (en) * | 2012-02-08 | 2014-04-30 | 郑先斌 | Multihole floating breakwater with wave energy weakened in multiple stages |
-
1995
- 1995-02-22 JP JP05802195A patent/JP3244993B2/en not_active Expired - Fee Related
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006335187A (en) * | 2005-06-01 | 2006-12-14 | Mitsubishi Heavy Ind Ltd | Low reflection type wave-dissipating structure for large float |
CN114215004A (en) * | 2021-12-09 | 2022-03-22 | 中交第三航务工程勘察设计院有限公司 | Floating breakwater structure with wave dissipation chamber and wave blocking plate and construction method thereof |
CN114235338A (en) * | 2021-12-17 | 2022-03-25 | 武汉理工大学 | Towing tank wave absorption device |
CN114235338B (en) * | 2021-12-17 | 2024-04-30 | 武汉理工大学 | Wave absorbing device of towing tank |
Also Published As
Publication number | Publication date |
---|---|
JP3244993B2 (en) | 2002-01-07 |
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Legal Events
Date | Code | Title | Description |
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A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20011003 |
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LAPS | Cancellation because of no payment of annual fees |