JP3170649U - Tsunami breakwater - Google Patents

Tsunami breakwater Download PDF

Info

Publication number
JP3170649U
JP3170649U JP2011004084U JP2011004084U JP3170649U JP 3170649 U JP3170649 U JP 3170649U JP 2011004084 U JP2011004084 U JP 2011004084U JP 2011004084 U JP2011004084 U JP 2011004084U JP 3170649 U JP3170649 U JP 3170649U
Authority
JP
Japan
Prior art keywords
tsunami
land
levee
breakwater
energy
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
Application number
JP2011004084U
Other languages
Japanese (ja)
Inventor
聡一朗 東
聡一朗 東
Original Assignee
聡一朗 東
聡一朗 東
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 聡一朗 東, 聡一朗 東 filed Critical 聡一朗 東
Priority to JP2011004084U priority Critical patent/JP3170649U/en
Application granted granted Critical
Publication of JP3170649U publication Critical patent/JP3170649U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Landscapes

  • Revetment (AREA)

Abstract

【課題】浅い海域に設置され、津波のエネルギーを減衰して沿岸における津波被害を少なくするようにした津波防波堤を提供する。【解決手段】浅い海域に複数の堤体10等を相互に船舶の通行を許容する間隔をあけかつ津波50の進行方向に対して直交するように多段に設け、複数の各堤体は想定された波高の津波の越波を阻止し得る堤高さを有し、津波が衝突する側の壁面10Aは津波を跳ね返すように側面円弧状に形成する。複数の堤体うち、陸上に近い堤体は、両側が陸上から離れる方向に折り曲げるのがよい。【選択図】図3The present invention provides a tsunami breakwater that is installed in a shallow sea area and attenuates tsunami energy to reduce tsunami damage on the coast. A plurality of levee bodies 10 and the like are provided in multiple stages in a shallow sea area so as to be spaced apart from each other to allow the passage of a ship and orthogonal to the traveling direction of a tsunami 50. The wall surface 10A on the side where the tsunami collides is formed in a side arc shape so as to bounce off the tsunami. Of the plurality of levee bodies, the dam body near the land is preferably bent in a direction in which both sides are separated from the land. [Selection] Figure 3

Description

本考案は津波防波堤に関し、特に浅い海域に設置され、津波のエネルギーを減衰して沿岸における津波被害を少なくするようにした防波堤に関する。   The present invention relates to a tsunami breakwater, and more particularly to a breakwater that is installed in a shallow sea area and attenuates tsunami energy to reduce tsunami damage on the coast.

我国は四方を海で囲まれている関係で、地震発生時における津波の被害が繰り返されてきた。津波は浅い海域で急激に波高が大きくなって、巨大なエネルギーのまま陸上にはい上がり(遡上)、陸上の家屋などを破壊しつくすなど、被害は甚大である。津波の波高は奥方が狭い湾岸地域だけでなく、海底が遠浅である地域でも非常に高くなることが知られている。   Since our country is surrounded by the sea on all sides, the tsunami damage at the time of the earthquake has been repeated. The tsunami has a tremendous amount of damage, including a sudden increase in wave height in shallow waters, ascending to the land (upward) with enormous energy, and destroying houses on the land. It is known that the tsunami wave height is very high not only in the narrow bay area but also in the shallow sea area.

津波の被害が懸念される地域では、例えば防潮堤によって津波の遡上を抑制することが行われている。防潮堤は過去の津波の波高などから堤高さが決定されているが、堤高さは安全確保の観点から、どんどん高くなり、それに伴って防潮堤の基礎も大きくなり、巨大な構造物となる傾向にある。   In areas where tsunami damage is a concern, tsunami run-up is suppressed, for example, by seawalls. The height of the seawall is determined from the wave height of past tsunamis, etc., but the height of the seawall is getting higher from the viewpoint of ensuring safety. Tend to be.

他方、浅い海域に、津波の越波を許容する堤高さの複数の堤体を津波の進行方向に直交するように多段に設置し、陸上に達する津波のエネルギーを減衰させるようにした津波防波堤が提案されている(特許文献1)。   On the other hand, there are tsunami breakwaters that are installed in multiple stages in shallow water so that the height of the tsunami that allows tsunami overtopping is perpendicular to the direction of the tsunami, so that the energy of the tsunami reaching the land is attenuated. It has been proposed (Patent Document 1).

また、天端面に津波の一部を越波させる開口を形成した堤体を浅い海域に設置し、開口の底面及び側面を粗面とし、陸上に達する津波のエネルギーを開口を通過させることによって減衰させるようにした津波防波堤が提案されている(特許文献2)。   In addition, a levee body with an opening that allows a part of the tsunami to pass over the top surface is installed in a shallow sea area, and the bottom and side surfaces of the opening are roughened, and the energy of the tsunami reaching the land is attenuated by passing through the opening. Such a tsunami breakwater has been proposed (Patent Document 2).

特開平07−113219号公報Japanese Patent Laid-Open No. 07-113219 特開平07−113216号公報Japanese Patent Laid-Open No. 07-113216

しかし、特許文献1、2記載の津波防波堤では越波によって津波のエネルギーを減衰させるようにしているので、巨大な津波に対しては津波のエネルギーをあまり減衰させることができず、津波の遡上による被害を軽減することができない。   However, in the tsunami breakwater described in Patent Documents 1 and 2, the tsunami energy is attenuated by overtopping. Therefore, the tsunami energy cannot be attenuated so much for a huge tsunami. Damage cannot be reduced.

本考案はかかる問題点に鑑み、巨大な津波であっても津波のエネルギーを確実に減衰して津波の被害を少なくできるようにした津波防波堤を提供することを課題とする。   In view of such problems, an object of the present invention is to provide a tsunami breakwater that can attenuate tsunami energy and reduce tsunami damage even if it is a huge tsunami.

そこで、本考案に係る津波防波堤は、浅い海域に複数の堤体が相互に船舶の通行を許容する間隔をあけかつ津波の進行方向に対して直交するように多段に設けられ、上記複数の各堤体は想定された波高の津波の越波を阻止し得る堤高さを有し、津波が衝突する側の壁面は津波を跳ね返すように側面円弧状に形成されていることを特徴とする。   Therefore, the tsunami breakwater according to the present invention is provided in multiple stages so that a plurality of levee bodies allow mutual passage of the ship in a shallow sea area and are orthogonal to the traveling direction of the tsunami. The levee body has a levee height that can prevent the tsunami of the assumed wave height from overtopping, and the wall surface on the side where the tsunami collides is formed in a side arc shape so as to bounce off the tsunami.

本考案の特徴の1つは複数の堤体を船舶が通行できる間隔をあけて多段に設け、複数の各堤体の堤高さを十分な高さとし、壁面を側面円弧状に形成するようにした点にある。   One of the features of the present invention is that a plurality of levee bodies are provided in multiple stages at intervals that allow a ship to pass, the height of each of the plurality of levee bodies is set to a sufficient height, and the wall surface is formed in a side arc shape. It is in the point.

これにより、沖合から進んできた津波は堤体に衝突して跳ね返され、次の津波と衝突して津波のエネルギーを相互に打ち消し合う。また、隣接する堤体の間を進行した津波は次段の堤体に向けて進行する。次段の堤体でも同様のことが起こる。このような働きが繰り返されて津波のエネルギーは次第に小さくなり、陸上に遡上して被害を発生させるおそれを少なくできる。   As a result, the tsunami that has traveled from offshore collides with the embankment and bounces off, collides with the next tsunami and cancels the energy of the tsunami. In addition, the tsunami that has traveled between adjacent levee bodies proceeds toward the next levee body. The same thing happens in the next levee. The tsunami energy gradually decreases as these functions are repeated, reducing the possibility of damage going up to land.

また、堤体は2段以上設ければよい。特に、複数のうち、陸上に近い堤体は、両側を陸上から離れる方向に折り曲げた形状とすると、陸上近くの堤体に衝突して進行方向を横に変えた津波は堤体両側の部分によって案内されて陸上から離れる方向に進行するので、陸上への遡上をより一層少なくできる。   Moreover, what is necessary is just to provide two or more levee bodies. In particular, if the shape of the dam body near the land is bent in the direction away from the land, the tsunami that collided with the dam body near the land and changed the direction of travel sideways was caused by the parts on both sides of the dam body. Since it is guided and travels away from the land, it is possible to further reduce the run-up to the land.

本考案に係る津波防波堤の好ましい実施形態を示す概略平面図である。It is a schematic plan view which shows preferable embodiment of the tsunami breakwater which concerns on this invention. 上記実施形態における作用を模式的に示す図である。It is a figure which shows typically the effect | action in the said embodiment. 上記実施形態における要部を模式的に示す図である。It is a figure which shows typically the principal part in the said embodiment.

以下、本考案を図面に示す具体例に基づいて詳細に説明する。図1ないし図3は本考案に係る津波防波堤の好ましい実施形態を示す。図において、湾20の例えば水深25mより浅い海底には複数の堤体10、11が津波の進行方向に対してほぼ直角になるように、かつ相互に船舶が通行し得る間隔W0、W1をあけて多段に設置され、各堤体10、11の両端には夜間における船舶の通行を案内する照明灯(図示せず)が設けられ、又陸上には海と家屋などの建造物13との間に防潮堤12が構築されている。   Hereinafter, the present invention will be described in detail based on specific examples shown in the drawings. 1 to 3 show a preferred embodiment of a tsunami breakwater according to the present invention. In the figure, on the seabed shallower than the depth of 25 m of the bay 20, for example, a plurality of levee bodies 10 and 11 are substantially perpendicular to the tsunami traveling direction, and intervals W0 and W1 through which ships can pass each other are opened. The levee bodies 10 and 11 are provided with multi-stage lighting lamps (not shown) at both ends of the levee bodies 10 and 11, and on the land, between the sea and a building 13 such as a house. A seawall 12 is constructed.

堤体10は基礎杭10Bを海底30下方の岩盤31に到達するように打ち込み、基礎杭10B上には堤体10が例えば鉄筋コンクリートを用い、想定される津波50の越波を阻止し得る堤高さに形成されている。この堤体10の前壁面には満潮時の海面を挟むように側面円弧凹状の壁面10Aが形成され、想定される波高の津波50が衝突したときに跳ね返すようになっている。   The levee body 10 drives the foundation pile 10B so as to reach the bedrock 31 below the seabed 30, and the levee body 10 uses, for example, reinforced concrete on the foundation pile 10B, and the height of the levee that can prevent the expected tsunami 50 from overtopping. Is formed. On the front wall surface of the levee body 10 is formed a side wall-arc concave wall surface 10A so as to sandwich the sea surface at the time of high tide, and it will rebound when a tsunami 50 having an assumed wave height collides.

また、陸上に近い堤体11は堤体10と同様の側面円弧凹状の壁面に形成されるとともに、両側部分が前方に折り曲げられた平面形状をなし、衝突した津波50の一部を斜め前方に送り出すようになっている。   Further, the dam body 11 near the land is formed on a side arc-shaped concave wall surface similar to the dam body 10 and has a planar shape in which both side portions are bent forward, and a part of the collided tsunami 50 is obliquely forward. It is designed to send out.

さらに、堤体10、11の背後には魚介類が繁殖するように石が積み上げられて漁礁10Cが形成され、漁礁10Cを覆うように消波ブロック10Dが積み上げられ、越波した津波を消波ブロック10Dに衝突させ、エネルギーを減衰させるようになっている。   Further, behind the dam bodies 10, 11, stones are piled up so that seafood breeds to form a fish reef 10C, and a wave-dissipating block 10D is piled up so as to cover the fish reef 10C. It is made to collide with 10D and attenuate energy.

沖合の海底で地震が発生し、津波50が湾20に向けて向けて押し寄せると、最初の段の堤体10に衝突する。すると、津波50は堤体10の円弧凹状の壁面10Aに衝突して跳ね返され、跳ね返された波50Aは押し寄せる津波50と衝突し、津波50の前方に押し寄せようとするエネルギーを減衰させる。   When an earthquake occurs on the offshore seabed and the tsunami 50 rushes toward the bay 20, it collides with the first stage levee body 10. Then, the tsunami 50 collides with the arc-shaped concave wall surface 10 </ b> A of the levee body 10 and is bounced back, and the bounced wave 50 </ b> A collides with the tsunami 50 that pushes down and attenuates energy that pushes forward to the tsunami 50.

他方、隣接する堤体10の間を進んだ津波50は次段の堤体10の壁面10Aに衝突し、最小の段の堤体10に衝突した津波50と同様に津波のエネルギーが減衰される。このような働きが繰り返され、津波50のエネルギーは大幅に減衰され、波高はそれほど高くなることはない。   On the other hand, the tsunami 50 traveling between the adjacent levee bodies 10 collides with the wall surface 10A of the next-stage levee body 10, and the tsunami energy is attenuated in the same manner as the tsunami 50 collided with the lowest-stage dam body 10. . Such a function is repeated, the energy of the tsunami 50 is greatly attenuated, and the wave height does not become so high.

たとえ、海岸線に達しても防潮堤12が設置されているので、家屋などの建造物13が被害を受けることは少ない。   Even if the coastline is reached, since the seawall 12 is installed, the building 13 such as a house is rarely damaged.

また、本例では陸上に近い堤体11の両側部分を前方に折り曲げているので、津波50の一部50Bは側方にガイドされ、建造物13の被害を更に少なくできる。   In this example, since both sides of the dam body 11 close to the land are bent forward, a part 50B of the tsunami 50 is guided to the side, and damage to the building 13 can be further reduced.

なお、上記では陸上に近い堤体11の両側を前方に折り曲げるようにしたが、真っ直ぐのままでもよい。   In the above description, both sides of the dam body 11 near the land are bent forward, but they may be kept straight.

10、11 堤体
10A 側面円弧凹状の壁面
20 湾
50 津波
10, 11 Dike body 10A Side wall circular concave wall 20 Bay 50 Tsunami

Claims (2)

浅い海域に複数の堤体(10、11)が相互に船舶の通行を許容する間隔をあけかつ津波(50)の進行方向に対して直交するように多段に設けられ、上記複数の各堤体(10、11)は想定された波高の津波(50)の越波を阻止し得る堤高さを有し、津波(50)が衝突する側の壁面(10A)は津波を跳ね返すように側面円弧状に形成されていることを特徴とする津波防波堤。   In the shallow sea area, a plurality of levee bodies (10, 11) are provided in multiple stages so as to be spaced apart from each other to allow passage of the ship and orthogonal to the traveling direction of the tsunami (50). (10, 11) has an embankment height that can prevent the tsunami (50) of the assumed wave height from overtopping, and the wall surface (10A) on the side where the tsunami (50) collides is a side arc shape so as to bounce the tsunami. Tsunami breakwater characterized by being formed in. 上記複数のうち、陸上に近い堤体(11)は、両側が陸上から離れる方向に折り曲げられている請求項1記載の津波防波堤。   The tsunami breakwater according to claim 1, wherein the dam body (11) near the land among the plurality is bent in a direction in which both sides are separated from the land.
JP2011004084U 2011-07-14 2011-07-14 Tsunami breakwater Expired - Fee Related JP3170649U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2011004084U JP3170649U (en) 2011-07-14 2011-07-14 Tsunami breakwater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2011004084U JP3170649U (en) 2011-07-14 2011-07-14 Tsunami breakwater

Publications (1)

Publication Number Publication Date
JP3170649U true JP3170649U (en) 2011-09-22

Family

ID=54881089

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2011004084U Expired - Fee Related JP3170649U (en) 2011-07-14 2011-07-14 Tsunami breakwater

Country Status (1)

Country Link
JP (1) JP3170649U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013113001A (en) * 2011-11-29 2013-06-10 Yoji Akutsu Tsunami protection breakwater and arrangement structure thereof
CN105862662A (en) * 2016-04-21 2016-08-17 重庆大学 Curved-edge arched wave prevention dam

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013113001A (en) * 2011-11-29 2013-06-10 Yoji Akutsu Tsunami protection breakwater and arrangement structure thereof
CN105862662A (en) * 2016-04-21 2016-08-17 重庆大学 Curved-edge arched wave prevention dam

Similar Documents

Publication Publication Date Title
CN202175933U (en) Novel breakwater
JP5135487B1 (en) Wave-dissipating inversion-induced curved column waterway structure and its arrangement structure
JP3170649U (en) Tsunami breakwater
JP2013060769A (en) Breakwater for seismic sea wave
JP2009114636A (en) Wave dissipating structure
JP2006257841A (en) Tidal wave sluice
JP6286193B2 (en) Revetment structure
JP2013159952A (en) Breakwater
JP2013234545A (en) Tsunami/tidal wave protection embankment
JPH07113219A (en) Multistage tsunami breakwater
JP2006193981A (en) Littoral transport control structure
JP5090060B2 (en) Coastal erosion prevention methods
JP2014020188A (en) Apparatus for mitigating mass transportation energy of tsunami
JP5949643B2 (en) Reinforcement structure of caisson type hybrid bank and method for constructing the reinforcement structure
JP2013124536A (en) Breakwater structure
JP2006125102A (en) Block for shore
JP2018048441A (en) Wave-dissipating block
JP2008223446A (en) Route burial preventing method and port facility preventing burial
JP5234415B2 (en) Sea area control structure
JP7557685B2 (en) Submerged breakwater structure
CN216739499U (en) Diversion channel structure
JP4413719B2 (en) Submarine
JP2013002061A (en) Highly stable offshore breakwater
JPWO2013031001A1 (en) Seawall
JP2012097542A (en) Revetment structure

Legal Events

Date Code Title Description
R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140831

Year of fee payment: 3

LAPS Cancellation because of no payment of annual fees