JPS6192207A - Wave dissipating structure - Google Patents
Wave dissipating structureInfo
- Publication number
- JPS6192207A JPS6192207A JP21046784A JP21046784A JPS6192207A JP S6192207 A JPS6192207 A JP S6192207A JP 21046784 A JP21046784 A JP 21046784A JP 21046784 A JP21046784 A JP 21046784A JP S6192207 A JPS6192207 A JP S6192207A
- Authority
- JP
- Japan
- Prior art keywords
- wave
- footings
- dissipating structure
- dissipating
- precast
- 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
- 239000000463 material Substances 0.000 abstract description 15
- 229910000831 Steel Inorganic materials 0.000 abstract description 7
- 239000010959 steel Substances 0.000 abstract description 7
- 238000004873 anchoring Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 230000037431 insertion Effects 0.000 description 7
- 238000003780 insertion Methods 0.000 description 7
- 238000010276 construction Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 4
- 238000013016 damping Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/06—Moles; Piers; Quays; Quay walls; Groynes; Breakwaters ; Wave dissipating walls; Quay equipment
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Revetment (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は港湾における防波堤や＃壁の前面に設置しミ波
のエネルギーを消費させる消波構造体に関し、主として
地耐圧の比較的低い軟弱な地盤に設置するための消波構
造体に関する。Detailed Description of the Invention (Industrial Application Field) The present invention relates to a wave-dissipating structure installed in front of a breakwater or #wall in a port to consume the energy of microwave waves. This article relates to a wave-dissipating structure to be installed on the ground.
（従来の技術）
一般に岸壁や防波堤の前面等に設置する大型の消波構造
体に【よ、従来大型のコンクリートケーソンを使用し、
内部に空間を有し、前面に内部空ｒ１に通じる多数の道
孔をＷＡｏさせた形式のものが多数提案され、ｌ！Ｑ、
ｆｆ！されている。(Conventional technology) Conventionally, large concrete caissons have been used for large wave-dissipating structures installed in front of quays and breakwaters, etc.
Many models have been proposed that have a space inside and a number of holes in the front that lead to the internal space r1 in the form of WAo, and l! Q,
ff! has been done.
（発明が解決しようとする問題点）
このような従来のケーソンによる大型の消波構造体は、
ケーソンのｆｉｆｆｉにより波の衝撃に耐えるようにし
ているものであるため、波のエネルギーを最も効率よく
消費させたとしても、横転を防止するために自らの１ｕ
ｌｌを大きくしなければならず、従って海底への設置に
際し、耐圧力の大きい基礎が必要となり、特に軟弱地盤
では大がかりな基礎工事が必要となったり、地盤に対す
る単位面積当りの載荷重を減少させるために波の侵入方
向のケーソン幅を大きくしなければならないものであり
、工事費が大となり、しかも工期が長くなるという問題
があった。(Problems to be solved by the invention) Such a large wave-dissipating structure using a conventional caisson,
Because the caisson's fiffi is designed to withstand the impact of waves, even if wave energy is consumed most efficiently, the caisson's fiffi
Therefore, when installing on the seabed, a foundation with high pressure resistance is required, which may require large-scale foundation construction especially in soft ground, or reduce the load per unit area on the ground. Therefore, the width of the caisson in the wave intrusion direction had to be increased, which resulted in problems such as high construction costs and a long construction period.
本発明は上述の如き従来の問題にかんがみ全体が軽量で
、軟弱な海庭地盤上に設置しても沈下せずしかも波力に
よって転倒することなく、従来の大型ケーソンによる消
波構造体と同程戊の消波効果が得られる消波構造体の提
供を目的としたものである。In view of the above-mentioned conventional problems, the present invention is lightweight as a whole, does not sink even when installed on soft seaside ground, and does not fall over due to wave force, and is similar to the conventional wave-dissipating structure using large caissons. The object of the present invention is to provide a wave-dissipating structure that can obtain a wave-dissipating effect.
（問題点を解決するための手段）
而して、本発明は上述の如き問題点を解決するため、略
半円筒状をしたアーチ型壁体と、該アーチ型型体の両端
に一体に備えられたフーチングとを有するとともに前記
アーチ型壁体に、その頂部を境にして一方側に多数の透
孔を形成した消波用プレキャストブロックを、前記透孔
を有する側を波の進行方向に対向させて海底に順次並べ
て多数設置し、その各プレキャストブロック間を連結し
て連続した半円筒状の消波壁と内部空間とを形成して消
波構造体を構成したのである。(Means for Solving the Problems) Therefore, in order to solve the above-mentioned problems, the present invention includes an arch-shaped wall body having a substantially semi-cylindrical shape, and integrally provided at both ends of the arch-shaped wall body. A wave-dissipating precast block having a footing formed in the arch-shaped wall body and having a large number of through holes formed on one side of the arch-shaped wall body with the top thereof as a boundary, the side with the through holes facing in the direction of wave propagation. A wave-dissipating structure was constructed by sequentially installing a large number of precast blocks on the seabed and connecting the precast blocks to form a continuous semi-cylindrical wave-dissipating wall and an internal space.
（作用）
そして、この消波構造体は連続した半円筒状であるため
、前面に打ち寄せられた波による衝撃力は円筒の曲率中
心方向に作用し、従って、円筒の底面の全体に分散され
て転倒方向への作用が小さくなり、全体が１台でも充分
な消波効果が１！７られるものである。(Function) Since this wave-dissipating structure has a continuous semi-cylindrical shape, the impact force caused by waves hitting the front surface acts in the direction of the center of curvature of the cylinder, and is therefore distributed over the entire bottom surface of the cylinder. The effect in the direction of overturning is reduced, and a sufficient wave dissipating effect can be achieved even with just one unit.
（実施例） 次に本発明の実施の一例を図面について説明する。(Example) Next, an example of implementation of the present invention will be described with reference to the drawings.
図中１はこの実施例の消波構造体を構成する消波用プレ
キャストブロックである。このプレキャストブロックは
矩形状をした板材を弓状に湾曲させた形状に成形した略
半円筒状をしたアーチ型壁体１ａを有し、そのアーチ型
壁体１ａにはその頂部を境にしてその一方側位置に多数
の透孔２が表裏に貫通させて形成されている。このアー
チ型壁体１の両端部にはその曲率半径方向に向けて内外
に突出させた略平板状のフーチング１ｂ、１ｂが一体に
成形されている。更にこのフーチング１ｂ。In the figure, numeral 1 is a wave-dissipating precast block constituting the wave-dissipating structure of this embodiment. This precast block has an arched wall 1a that is approximately semi-cylindrical and is formed by forming a rectangular board into an arched shape. A large number of through holes 2 are formed on one side so as to pass through the front and back sides. At both ends of the arch-shaped wall 1, substantially flat footings 1b, 1b are integrally formed, which project inwardly and outwardly in the direction of the radius of curvature. Furthermore, this footing 1b.
１ｂには上下に貫通して複数の支持杭挿入孔３が成形さ
れているとともに、この両フーチング１ｂ。A plurality of support pile insertion holes 3 are formed vertically through the footing 1b, and both footings 1b.
１ｂには互いに同・−中心線配置にＰＣ鋼材挿通孔４が
貫通開口され、更にフーチングｌｂ、１ｂ及びアーチ型
壁体１ａの幅方向に向けて、多数のＰｃｔｔｌＩ材挿通
孔５が貫通ｎ口されている。1b, PC steel material insertion holes 4 are opened through them in the same center line arrangement, and a large number of PCTTI material insertion holes 5 are also penetrated in the width direction of the footing lb, 1b, and the arched wall 1a. has been done.
このように構成されたプレキャストブロックを使用して
本発明に係る消波構造体を構築するものであり、まず、
構築現場の海底地盤上に捨石１０を投入し、その表面を
均平化する。なお、この捨石１０の投入は従来のケーソ
ン堤の構築のように強固な塁礎マウンドを形成するので
はなく、海底表面を均平化する程度に並べる。The wave-dissipating structure according to the present invention is constructed using the precast blocks configured as described above, and first,
Rubble stones 10 are thrown onto the seabed ground at the construction site and the surface is leveled. Note that the rubble stones 10 are not thrown in to form a strong foundation mound as in the construction of a conventional caisson embankment, but are arranged so as to level the seabed surface.
一方プレキヤスドブロックはその両端のフーチング１ｂ
、Ｉｂ間に柱状のコンクリートプレキャスト部材からな
るストラット１１を介在させ両フーチング１ｂ、１ｂ及
びストラット１１にあらかじめ貫通開口させた各ＰＣｍ
Ｃｍ通挿通孔続させてＰＣＩ材１２を挿通し、フーチン
グ１ｂの外側において、このｐｃｍ材１２の両端を緊張
定着し、全体にプレストレスを付与しておく。このよう
にして、フーチングｉｂ、ｉｂ間にプレストレスを付与
した後、そのプレキャストブロック１を船上より吊り下
げて前述した捨石１０上に設置する。On the other hand, the precast block has footings 1b at both ends.
, each PCm in which a strut 11 made of a columnar concrete precast member is interposed between Ib and both footings 1b, 1b and the strut 11 are opened in advance.
The PCI material 12 is inserted through the Cm insertion hole, and both ends of the PCM material 12 are tensioned and fixed on the outside of the footing 1b to apply prestress to the entire material. After applying prestress between the footings ib and ib in this manner, the precast block 1 is suspended from a ship and installed on the rubble 10 described above.
設置後、両フーチング１ｂ、Ｉｂの支持杭挿入孔３に貫
通させて海底地盤へ支持杭１３を打込みプレキャストブ
ロック１を滑り止めする。After installation, the support piles 13 are driven into the seabed ground through the support pile insertion holes 3 of both footings 1b and Ib to prevent the precast block 1 from slipping.
このようにして順次プレキャストブロック１゜１・・・
を拾石１０上に並べて設置し、各プレキャストブロック
１．１・・・のＰＣｍ材禅通孔５．５・・・に連続させ
てＰＣｄＭ材１４を挿通し、複数のプレキ ・ヤスドブ
ロックを一単位にまとめて緊張定着する。In this way, precast blocks 1゜1...
are placed side by side on the picking stones 10, and the PCdM material 14 is continuously inserted into the PCm material hole 5.5... of each precast block 1.1..., and the plurality of precast/yasd blocks are placed in one place. Tension is established in units.
なお、各プレキレストブロック間の緊張定着は隣接する
もの間を順次連結し、全てのプレキャストブロック１．
１・・・間を一体化させてもよいものである。また前述
したＰＣ鋼材１２．１４はその端部が外面に露出しない
ようにコンクリートをもって埋め込むとどもに各ＰＣＷ
４材挿通孔内にはグラウトを注入し、海水の侵入を防止
する。In addition, tension fixing between each precast block connects adjacent ones sequentially, and all precast blocks 1.
1... The space may be integrated. In addition, the PC steel materials 12 and 14 described above are buried with concrete so that their ends are not exposed to the outside, and each PCW
Grout is injected into the four material insertion holes to prevent seawater from entering.
このようにして、前面に多数の透孔２，２．・・・が開
口された円弧状の透過壁部Ａと、その背面内部に略半円
筒形状をした遊水部Ｂを有する消波構造体を構築する。In this way, a large number of through holes 2, 2. A wave-dissipating structure is constructed that has an arc-shaped transparent wall section A with openings, and a water retarding section B that is approximately semi-cylindrical inside the back surface thereof.
なお図中１５は根固め用ブロックである。Note that 15 in the figure is a block for hardening the roots.
上述した実施例は単独の防波堤とした場合を示している
が本発明は岸壁の護岸用として使用してもよく、この場
合は第６図に示すようにプレキャストブロック１の頂部
に防波壁体１Ｃを一体に成形しておき、透孔２′！ｒ海
側に向けて前述と同様にして浦波構造体を構築し、頂部
の防波壁体１Ｃから陸側に盛土Ｃを施して消波構造体そ
のものを岸壁となす。Although the above-mentioned embodiment shows the case where a single breakwater is used, the present invention may also be used as a breakwater for a quay wall. In this case, a breakwater body is attached to the top of the precast block 1 as shown in FIG. 1C is molded in one piece, and the through hole 2'! r A Uranami structure is constructed in the same manner as described above toward the sea side, and an embankment C is applied from the top breakwater wall 1C to the land side, thereby making the wave-dissipating structure itself a quay.
このように構成される消波構造体は、その前面に波が打
ち寄せた場合第６図に示すように透過壁部Ａは円筒形の
曲面を有しているため、波の作用力Ｐは一部が垂直力と
して働き、かつ、垂直分力Ｐｌと水平分力Ｐ２の合力は
円筒の曲率中心に向けて作用することになる。In the wave-dissipating structure constructed in this way, when a wave crashes on the front surface of the structure, as shown in FIG. 6, since the transparent wall portion A has a cylindrical curved surface, the acting force P of the wave is The force acts as a vertical force, and the resultant force of the vertical component Pl and the horizontal component P2 acts toward the center of curvature of the cylinder.
（発明の効果）
本発明の消波構造体は上述の如く構成され、半円筒状を
した壁体の前面に透過孔が形成された構造となっている
ため、これに対する波の作用力は垂直方向の分力が消波
構造体全体の自重と同様の分布で海底面に作用すること
となり、しかもこの作用力は波のエネルギーの大きさに
応じて発生する。従って、消波構造体に対して転倒力と
して作用する水平方向の分力が小さくなる。また打ち寄
せる波のエネルギーは、透過壁部に衝突した場合 ゛に
消波構造体の曲率中心に作用するため、応力は底面全体
に分散され、底面全体でエネルギーに対抗することにな
り、その結果、消波構造体全体が軽量でしかも比較的幅
が小さい場合であっても転倒することがなくなり、この
ため、地盤の支圧力が小さい場合でも特別に地盤改良や
強固な基礎を構築することなく構築し得る。(Effects of the Invention) The wave-dissipating structure of the present invention is constructed as described above, and has a structure in which a transmission hole is formed in the front face of a semi-cylindrical wall, so that the force of waves acting on it is perpendicular. The component force in this direction acts on the seabed surface in a distribution similar to the weight of the entire wave-dissipating structure, and this acting force is generated in accordance with the magnitude of wave energy. Therefore, the horizontal component force acting on the wave-dissipating structure as an overturning force is reduced. In addition, when the energy of the crashing waves collides with the transparent wall, it acts on the center of curvature of the wave-dissipating structure, so the stress is dispersed over the entire bottom surface, and the entire bottom surface counteracts the energy. Even if the entire wave-dissipating structure is lightweight and has a relatively small width, it will not fall over, so even if the bearing force of the ground is small, it can be constructed without special ground improvement or building a strong foundation. It is possible.
更に、透過孔を有する透過壁部は円筒形状をしているた
め、従来の直立した透過壁部を有するものに比べて面積
を広くでき、従って、従来と同様の消波効果が得られる
。Further, since the transmission wall portion having the transmission hole has a cylindrical shape, the area can be made larger than that of a conventional one having an upright transmission wall portion, and therefore, the same wave-damping effect as in the prior art can be obtained.
更にまた、半円筒状をしたアーチ型壁体とフーチングか
うなるプレキャストブロックを連結して構築するもので
あるため、従来の大型ケーソンに比べ一個のプレキャス
トブロックが軽量であり、従って、取り扱いが容昌とな
り、工事が短期間で行なわれる等の効果がある。Furthermore, since it is constructed by connecting precast blocks with semi-cylindrical arched walls and footings, each precast block is lighter than conventional large caissons, making it easy to handle. This has the effect of allowing construction work to be completed in a short period of time.
図面は本発明の実施例を示すもので、第１図は本発明に
使用する消波用プレキャストブロックの平面図、第２図
は同側面図、第３図は同正面図、第４図は消波構造体の
部分圧゛面図、第５図は的板断面図、第６図は他の実施
例？縦断面図で璃る。
１・・・・・・消波用プレキャストブロック゛り、１ｂ
・・・・・・アーチ型壁体、１ｂ・・・・・・フーチン
グ、２・・・・・・透孔、３・・・・・・支持杭挿入孔
、４．５・・・・・・ＰＣｍＣｍ通挿通孔０・・・・・
・捨石、１１・・・・・・ストラット、１２．１４・・
・・・・ＰＣＭ材、１３・・・・・・支持杭。The drawings show embodiments of the present invention; FIG. 1 is a plan view of a wave-dissipating precast block used in the present invention, FIG. 2 is a side view of the same, FIG. 3 is a front view of the same, and FIG. A partial pressure sectional view of the wave-dissipating structure, FIG. 5 is a cross-sectional view of the target plate, and FIG. 6 is another example. It is shown in a longitudinal cross-sectional view. 1... Precast block for wave dissipation, 1b
...Archied wall, 1b...Footing, 2...Through hole, 3...Support pile insertion hole, 4.5...・PCmCm through hole 0...
・Rubbish, 11...Strut, 12.14...
...PCM material, 13...Support pile.
Claims (1)
端に一体に備えられたフーチングとを有するとともに前
記アーチ型壁体に、その頂部を境にして一方側に多数の
透孔を形成した消波用プレキャストブロックを、前記透
孔を有する側を波の進行方向に対向させて海底に順次並
べて多数設置し、その各プレキャストブロック間を連結
して連続した半円筒状の消波壁と内部空間とを形成して
なる消波構造体。The arched wall has a substantially semi-cylindrical shape, and footings are integrally provided at both ends of the arched wall, and the arched wall has a large number of through holes on one side of the arched wall with the top thereof as the boundary. A large number of wave-dissipating precast blocks with the above-mentioned perforated holes facing the direction of wave propagation are sequentially arranged on the seabed, and each of the precast blocks is connected to form a continuous semi-cylindrical wave-dissipating wave-dissipating block. A wave-dissipating structure consisting of a wall and an internal space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21046784A JPS6192207A (en) | 1984-10-09 | 1984-10-09 | Wave dissipating structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21046784A JPS6192207A (en) | 1984-10-09 | 1984-10-09 | Wave dissipating structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6192207A true JPS6192207A (en) | 1986-05-10 |
| JPH0125843B2 JPH0125843B2 (en) | 1989-05-19 |
Family
ID=16589817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21046784A Granted JPS6192207A (en) | 1984-10-09 | 1984-10-09 | Wave dissipating structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6192207A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63130808A (en) * | 1986-11-19 | 1988-06-03 | Unyusho Kowan Gijutsu Kenkyusho | Wave control structure |
| JPH01247608A (en) * | 1988-03-30 | 1989-10-03 | Unyusho Kowan Gijutsu Kenkyusho | Wave controlling structural body |
| FR3123925A1 (en) * | 2021-06-15 | 2022-12-16 | Azote | Reef-forming underwater structure system. |
-
1984
- 1984-10-09 JP JP21046784A patent/JPS6192207A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63130808A (en) * | 1986-11-19 | 1988-06-03 | Unyusho Kowan Gijutsu Kenkyusho | Wave control structure |
| JPH01247608A (en) * | 1988-03-30 | 1989-10-03 | Unyusho Kowan Gijutsu Kenkyusho | Wave controlling structural body |
| FR3123925A1 (en) * | 2021-06-15 | 2022-12-16 | Azote | Reef-forming underwater structure system. |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0125843B2 (en) | 1989-05-19 |
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