JP2522800B2 - Wave-dissipating wall - Google Patents
Wave-dissipating wallInfo
- Publication number
- JP2522800B2 JP2522800B2 JP62191959A JP19195987A JP2522800B2 JP 2522800 B2 JP2522800 B2 JP 2522800B2 JP 62191959 A JP62191959 A JP 62191959A JP 19195987 A JP19195987 A JP 19195987A JP 2522800 B2 JP2522800 B2 JP 2522800B2
- Authority
- JP
- Japan
- Prior art keywords
- wave
- dissipating
- wall
- tube
- breaking
- 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 - Fee Related
Links
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- Revetment (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は防波堤などの消波壁に関する。TECHNICAL FIELD The present invention relates to a breakwater wall such as a breakwater.
従来の技術 従来における防波堤などの消波壁として、たとえば特
願昭61-214918号に開示されるように、一端側の開口が
湾外側に位置するとともに他端側の開口が湾内側に位置
する消波用のパイプ状構造物を上下左右に複数積み上げ
たものが知られている。ここで、パイプ状構造物は四角
柱状のコンクリートブロックの内部に、鋳鉄などにて異
形断面に形成された消波管を埋設したものが一般的であ
る。このような構成によれば、湾外側から進行してきた
波は、消波管内を通過するときに、この消波管内におけ
る通路断面積の変化などにより減衰を受けることとな
る。2. Description of the Related Art As a conventional breakwater such as a breakwater, for example, as disclosed in Japanese Patent Application No. 61-214918, the opening on one end side is located outside the bay and the opening on the other end side is located inside the bay. It is known that a plurality of pipe-shaped structures for wave-dissipation are stacked vertically and horizontally. Here, the pipe-shaped structure is generally one in which a wave-dissipating pipe having a modified cross section made of cast iron or the like is embedded inside a square-shaped concrete block. According to such a configuration, when the wave traveling from the outside of the bay passes through the wave-dissipating tube, the wave is attenuated due to a change in the passage cross-sectional area in the wave-dissipating tube.
発明が解決しようとする問題点 しかし、従来のような構成では、消波壁の壁面に向け
て進行して来た波のうち、消波管の内部に入り込まなか
ったものが、コンクリートブロックの端面に衝突して、
湾外側へ向かう大きな反射波が生じやすいという問題が
あった。However, in the conventional configuration, among the waves traveling toward the wall surface of the wave-eliminating wall, the one that did not enter the interior of the wave-eliminating pipe is the end surface of the concrete block. Collided with
There was a problem that a large reflected wave toward the outside of the bay was likely to occur.
本発明は上記問題点を解決するもので反射波の発生を
抑制する消波壁を提供することを目的とする。SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and to provide a wave breaking wall that suppresses the generation of reflected waves.
問題点を解決するための手段 上記問題点を解決するため、本発明は、一端側の開口
を波浪の伝播方向に向けて形成され、前面側の水域と背
面側の水域とを連通する消波孔が、軸心を波浪の伝播方
向の下流に向けて上勾配で水平に対して10度以上30度以
下に傾斜させながら複数段に設けられた構成としたもの
である。Means for Solving the Problems In order to solve the above problems, the present invention is directed to a wave breaker which is formed with an opening on one end side directed in the direction of wave propagation and which communicates a water area on the front side with a water area on the back side. The holes are arranged in a plurality of stages while inclining the shaft center toward the downstream in the wave propagation direction with an upward gradient from 10 degrees to 30 degrees with respect to the horizontal.
作用 上記構成において、消波孔に向けて進行して来た波浪
は、一端側の開口から消波孔内に伝播する。この時、消
波孔の軸心が上勾配で傾斜しているので、波浪と消波孔
の内壁との摩擦力が増大されて、消波孔の消波作用が促
進されるとともに、反射波も低減される。Action In the above structure, the waves traveling toward the wave-eliminating hole propagate into the wave-eliminating hole through the opening on the one end side. At this time, since the axis of the wave breaking hole is inclined with an upward slope, the frictional force between the wave and the inner wall of the wave breaking hole is increased, the wave breaking action of the wave breaking hole is promoted, and the reflected wave Is also reduced.
実施例 以下、本発明の一実施例を図面に基づいて説明する。
第１図において、消波孔を形成する消波管１は異形断面
の鋳鉄管より成り、一端側の開口1aを波浪２の伝播方向
に向けて配置されており、その軸心３は波浪２の伝播方
向の下流に向けて上勾配に傾斜し、かつ軸心３と水平４
との成す傾斜角は10度以上30度以下に成されている。そ
して、複数の消波管１がコンクリート６で固められてユ
ニット７に形成されており、各ユニット７は積み重ねた
時に、それぞれに埋込まれた消波管１が連通可能に形成
されている。そして、複数のユニット７をマウンド８上
に積み重ねて消波壁９が構築されている。また、消波壁
９の上端部を形成するユニット10は、他のユニット７と
は別途に形成されており、消波管１が途中で跡切れるこ
とがないように形成されている。Embodiment An embodiment of the present invention will be described below with reference to the drawings.
In FIG. 1, a wave breaking pipe 1 forming a wave breaking hole is made of a cast iron pipe having an irregular cross section, and an opening 1a on one end side is arranged in the propagation direction of the wave 2, and its axial center 3 is a wave 2 Of the axis 3 and the horizontal 4
The tilt angle formed by and is 10 degrees or more and 30 degrees or less. A plurality of wave-dissipating pipes 1 are solidified with concrete 6 to form a unit 7. When each unit 7 is stacked, the wave-dissipating pipes 1 embedded in each unit 7 are formed so as to be able to communicate with each other. Then, a plurality of units 7 are stacked on the mound 8 to construct the wave-dissipating wall 9. Further, the unit 10 forming the upper end of the wave-dissipating wall 9 is formed separately from the other units 7, and is formed so that the wave-dissipating tube 1 will not be cut off midway.
以下、上記構成における作用について説明する。ま
ず、消波壁９に向けて進行して来た波浪２は、消波管１
の一端側の開口1aより消波管１内に伝播する。そして、
消波管１内において、波浪２は流路断面積の変化による
圧力損失等により減衰されて消波される。この時、消波
管１の軸心が上勾配で傾斜しているので、波浪２と消波
管１の内壁との摩擦力が増大されて、消波管１の消波作
用が促進されるとともに、反射波も低減される。ちなみ
に、第１表に傾斜角と反射率および透過率の関係を示す
ものである。ただし、波高:3.5m、消波管１の長さ:6m、
消波壁９の壁面における消波管１の開口率12％の条件下
におけるものである。The operation of the above configuration will be described below. First of all, the wave 2 traveling toward the wave breaking wall 9 is the wave breaking tube 1.
Propagates into the wave-dissipating tube 1 through the opening 1a on one end side thereof. And
In the wave-eliminating tube 1, the waves 2 are attenuated and extinguished by pressure loss or the like due to a change in the flow passage cross-sectional area. At this time, since the axis of the wave-dissipating tube 1 is inclined upward, the frictional force between the wave 2 and the inner wall of the wave-dissipating tube 1 is increased, and the wave-dissipating function of the wave-dissipating tube 1 is promoted. At the same time, the reflected wave is also reduced. By the way, Table 1 shows the relationship between the inclination angle and the reflectance and transmittance. However, wave height: 3.5m, length of wave-eliminating tube 1: 6m,
This is under the condition that the aperture ratio of the wave-breaking tube 1 on the wall surface of the wave-breaking wall 9 is 12%.
第１表から明らかなように、傾斜角度が増加するにした
がって反射率が低下する。しかし、透過率が傾斜角度の
増加に伴なって低下することと、30°以上に傾斜させて
も、反射率を変化せず透過率のみが低下することを考慮
すると、10°以上30°以下の傾斜角度が適当なものと判
断される。 As is clear from Table 1, the reflectance decreases as the tilt angle increases. However, considering that the transmittance decreases as the tilt angle increases and that the transmittance does not change even when tilted to 30 ° or more, only 10 ° or more and 30 ° or less. The inclination angle of is determined to be appropriate.
第２図は本発明の他の実施例を示すものであり、先の
実施例と同様な作用を有する部材は同一番号を付して説
明を省略する。すなわち、この実施例においては、各ユ
ニット11が先のものに較べてさらに細分化されており、
このために、ユニット11の１単体としての重量が低減さ
れ、取扱いが容易なものとされている。FIG. 2 shows another embodiment of the present invention. Members having the same operations as those of the previous embodiment are designated by the same reference numerals and the description thereof will be omitted. That is, in this embodiment, each unit 11 is further subdivided as compared with the previous one,
Therefore, the weight of the unit 11 as a single unit is reduced and the unit 11 is easy to handle.
発明の効果 以上述べたごとく本発明によれば、消波孔を、その軸
心を傾斜させて設けることにより消波孔の消波作用を促
進させるとともに、反射率の低減を図ることが出来る。EFFECTS OF THE INVENTION As described above, according to the present invention, by providing the wave-eliminating hole with its axis inclined, the wave-eliminating action of the wave-eliminating hole can be promoted and the reflectance can be reduced.
第１図は本発明の一実施例を示す全体構成図、第２図は
本発明の他の実施例を示す全体構成図である。 １……消波管、２……波浪、３……軸心、４……水平、
５……傾斜角、7,10,11……ユニット。FIG. 1 is an overall configuration diagram showing an embodiment of the present invention, and FIG. 2 is an overall configuration diagram showing another embodiment of the present invention. 1 ... Wave breaker tube, 2 ... Wave, 3 ... Shaft center, 4 ... Horizontal,
5 …… Inclination angle, 7,10,11 …… Unit.
Claims (1)
成され、前面側の水域と背面側の水域とを連通する消波
孔が、軸心を波浪の伝播方向の下流に向けて上勾配で水
平に対して10度以上30度以下に傾斜させながら複数段に
設けられたことを特徴とする消波壁。1. A wave-dissipating hole, which is formed with an opening on one end side facing the propagation direction of waves and connects the water area on the front side and the water area on the back side, has its shaft center directed downstream in the propagation direction of the waves. A wave-dissipating wall characterized by being installed in multiple stages while inclining to an angle of 10 degrees or more and 30 degrees or less with respect to the horizontal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62191959A JP2522800B2 (en) | 1987-07-30 | 1987-07-30 | Wave-dissipating wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62191959A JP2522800B2 (en) | 1987-07-30 | 1987-07-30 | Wave-dissipating wall |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6436809A JPS6436809A (en) | 1989-02-07 |
| JP2522800B2 true JP2522800B2 (en) | 1996-08-07 |
Family
ID=16283292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62191959A Expired - Fee Related JP2522800B2 (en) | 1987-07-30 | 1987-07-30 | Wave-dissipating wall |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2522800B2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5321735U (en) * | 1976-07-30 | 1978-02-23 |
-
1987
- 1987-07-30 JP JP62191959A patent/JP2522800B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6436809A (en) | 1989-02-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |