JPH09151444A - Installation structure for bag type weir - Google Patents
Installation structure for bag type weirInfo
- Publication number
- JPH09151444A JPH09151444A JP33590395A JP33590395A JPH09151444A JP H09151444 A JPH09151444 A JP H09151444A JP 33590395 A JP33590395 A JP 33590395A JP 33590395 A JP33590395 A JP 33590395A JP H09151444 A JPH09151444 A JP H09151444A
- Authority
- JP
- Japan
- Prior art keywords
- weir
- water
- bag type
- bag
- upstream
- 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.)
- Pending
Links
Landscapes
- Barrages (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、河川に横断して設
け、上・下流水位を管理するようにした袋状堰の設置構
造に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag-like weir installation structure that is provided across a river to control the upstream and downstream water levels.
【0002】[0002]
【従来の技術】河川を横断して設けられる袋状堰はゴム
引き布(可撓膜)で製作され、通常、水路に対し直交方
向に直線状に堰体を配置する。貯水する場合は袋状堰を
堰上げ、上流水位が上がったときは袋状堰を倒伏して過
剰の水を流下させる。袋状堰は内部に流体を入れて膨張
させて堰上げ、倒伏させる場合は流体を排出する仕組み
になっている。袋状堰を堰上げ、貯溜水が多くなってく
ると、水流の上下流方向に力を発生するような水面の振
動が、堰体への大きな負荷となる。空気を充填する方式
においては、空気の膨張収縮率が水より大きく、水面の
振動等の外的要因の影響を受けやすい。したがって、越
流水深が堰高に対し20%を越えない範囲内で起立また
は倒伏させるようになっている。2. Description of the Related Art A bag-like weir provided across a river is made of a rubberized cloth (flexible membrane), and normally the weir body is arranged in a straight line in a direction orthogonal to a water channel. When storing water, the bag-like weir is raised, and when the upstream water level rises, the bag-like weir is laid down to allow excess water to flow down. The bag-like weir has a mechanism in which a fluid is put into the bag to expand and weir it, and when the bag is toppled, the fluid is discharged. When the bag-like weir is weired and the stored water increases, vibration of the water surface that generates a force in the upstream and downstream directions of the water flow causes a large load on the weir body. In the method of filling air, the rate of expansion and contraction of air is larger than that of water, and it is easily affected by external factors such as vibration of the water surface. Therefore, the overflow water depth is set to rise or fall within a range not exceeding 20% of the weir height.
【0003】[0003]
【発明が解決しようとする課題】しかしながら、上記条
件のため、上限の越流水深にさせないように、貯溜水の
最大水位が少しでも上限に近づいたら倒伏させるので常
時、越流水深を小さく維持することになり、また、倒伏
頻度が多いので、長期間、流水を貯溜することもできな
い。したがって、貯水の必要な時期にも倒伏させること
があり、上流での利水、水位の管理が不便である。ま
た、越流水深を小さく維持させているので、通常の全越
流量は少なくなるが、倒伏操作が多く、下流域での水位
の変動が激しいので管理が難しいものになる。However, because of the above conditions, the overflow water depth is kept at a small level at all times because the maximum overflow water depth of the stored water is laid down so that the overflow water depth does not reach the upper limit. In addition, since the lodging frequency is high, running water cannot be stored for a long period of time. Therefore, it may be overlaid even when water is needed to store water, and it is inconvenient to manage water use and water level upstream. In addition, since the overflow water depth is kept small, the normal total overflow is reduced, but there are many lodging operations and the water level changes in the downstream region are severe, which makes management difficult.
【0004】本発明は、堰体にかかる負荷を抑えて越流
量を多くした袋状堰の設置構造を提供することを目的と
する。It is an object of the present invention to provide a bag-like weir installation structure in which the load on the weir body is suppressed and the overflow amount is increased.
【0005】[0005]
【課題を解決するための手段】本発明は上記目的を達成
するために、河床に上流側に突出させて円弧状に止め具
を配置し、可撓膜を2つ折りにして合わせ部を密着さ
せ、袋状に形成した堰体の前記合わせ部を前記止め具に
よって固定したことを特徴とする。In order to achieve the above-mentioned object, the present invention arranges a stopper in an arc shape so as to project upstream in the river bed and fold the flexible membrane in two to bring the mating portion into close contact. The bag-shaped weir body is fixed by the stopper.
【0006】[0006]
【発明の実施の形態】本発明が対象とする袋状堰はゴム
引き布製であり、越流水深が大きくなると水の上下流方
向の振動が堰体に大きく影響し、特に、堰体内部に空気
を入れた場合はなおさらである。よって、越流水深の上
限を厳守する必要がある。一方、下流域での利水のため
越流量を多くすることは管理するうえでも便利である。
そこで、従来わずかな水位変動によって堰を倒伏させて
いたが、本発明では堰体形状を流れ方向に対して円弧状
に形成し、越流長を長くした。また、この形状により、
水流方向の振動による外力は水路幅方向に分散され、外
的要因に対しても剛性強度を増し越流水深の許容値は十
分維持され、全越流量が多くなる。また、水位変動が緩
くなるので倒伏回数も少なくなる。BEST MODE FOR CARRYING OUT THE INVENTION The bag-like weir targeted by the present invention is made of rubberized cloth, and when the overflow water depth increases, the vibration of water in the upstream and downstream directions greatly affects the weir body. Especially when air is added. Therefore, it is necessary to strictly observe the upper limit of overflow water depth. On the other hand, increasing the amount of overflow due to water utilization in the downstream area is convenient for management.
In view of this, conventionally, the weir was laid down by a slight change in the water level, but in the present invention, the shape of the weir body is formed in an arc shape in the flow direction to increase the overflow length. Also, due to this shape,
The external force due to the vibration in the water flow direction is dispersed in the water channel width direction, the rigidity strength is increased against external factors, the allowable value of the overflow water depth is sufficiently maintained, and the total overflow flow increases. In addition, since the fluctuation of the water level becomes gentle, the number of lodgings is reduced.
【0007】[0007]
【実施例】以下、本発明による実施例を添付図面に基づ
いて説明する。図1、図2に示すように、水路1の両側
には護岸2が構築され、護岸2の傾斜面と河床(幅W)
とに亙って袋状堰3の止め具4が、上流側に凸の円弧状
に配置され、ゴム引き布を2つ折りにした袋状堰3の合
わせ部3aを、止め具4で密着させて河床に固定させて
いる。2つ折りにしたゴム引き布の両端も護岸2に配し
た止め具4によって密着固定して袋状にされ、袋状堰3
は内部に流体を入れて膨らませるようにしている。Embodiments of the present invention will be described below with reference to the accompanying drawings. As shown in Fig. 1 and Fig. 2, seawalls 2 are constructed on both sides of the waterway 1, and the slope of the seawall 2 and the riverbed (width W)
The stoppers 4 of the bag-shaped weir 3 are arranged in a convex arc shape on the upstream side, and the stopper 4 is brought into close contact with the mating portion 3a of the bag-shaped weir 3 obtained by folding the rubberized cloth in two. Fixed on the riverbed. Both ends of the rubber-folded cloth folded in two are closely fixed by a stopper 4 arranged on the revetment 2 to form a bag, and the bag-like weir 3
Is designed to inflate the fluid inside.
【0008】堰体内部に入れる流体は一般に水、空気で
あるが、一例として、図3に示すように、袋状堰3の内
部に送風機5からの送排気管6を連通することで、空気
を供給して膨張させ堰上げるようになっている。ゴム引
き布製の堰体内部に供給される空気によって堰体頂部は
略同じ高さの円弧状に形成されるので、水流に対して越
流水深Hはいずれの位置でもほぼ同じである。したがっ
て、従来直線状に設けた堰よりも堰体頂部が長くなり、
起立時においては堰体が湾曲しているので水流方向の振
動による外力は水路幅方向に分散され、堰体への負荷が
軽減され、直線状の堰よりも全越流量を増加させるもの
である。これにより、越流水深Hの変動も小さくなって
上・下流水位の管理を容易にすることができる。また、
堰体を円弧状にすることにより、従来の堰のイメージか
ら離れ、自然界の滝をイメージさせ、周囲環境との調和
をとる景観とすることも可能である。The fluid to be put into the weir body is generally water or air. As an example, as shown in FIG. 3, by connecting a blower / exhaust pipe 6 from a blower 5 to the inside of the bag-like weir 3, air is discharged. Is supplied to expand and weir it. Since the top of the weir body is formed in an arc shape having substantially the same height by the air supplied into the weir body made of rubberized cloth, the overflow water depth H is substantially the same at any position with respect to the water flow. Therefore, the top of the weir body becomes longer than the weir that was conventionally provided in a straight line,
Since the weir body is curved at the time of standing, the external force due to the vibration in the water flow direction is dispersed in the waterway width direction, the load on the weir body is reduced, and the overall flow rate is increased compared to the linear weir. . As a result, fluctuations in the overflow water depth H are reduced, and it is possible to easily manage the upstream and downstream water levels. Also,
By making the weir body into an arc shape, it is possible to create a landscape that is in harmony with the surrounding environment by imagining a waterfall in the natural world, away from the image of a conventional weir.
【0009】[0009]
【発明の効果】本発明は、以上のように構成したもので
あるので、湾曲した堰体頂部から水が流下し、越流水深
が低くても全越流量を多くすることができ、また、越流
水深の変動も小さくなるので、袋状堰の倒伏条件におい
て、貯溜水の最高水位が越流水深の上限に近づくことが
少なくなり、上・下流水位の管理が容易になる。EFFECTS OF THE INVENTION Since the present invention is configured as described above, water flows down from the curved top of the weir body, and the total overflow rate can be increased even when the overflow depth is low. Since the fluctuation of overflow water depth also becomes small, the maximum water level of stored water rarely approaches the upper limit of overflow water depth under the baggage weir collapse condition, which facilitates the management of upstream and downstream water levels.
【図1】本発明による実施例の、護岸が傾斜しているこ
とを示す断面を下部に呈した袋状堰の設置構造を示す平
面図である。FIG. 1 is a plan view showing an installation structure of a bag-like weir having a cross section showing that a revetment is inclined in the lower part, according to an embodiment of the present invention.
【図2】図1に示す袋状堰を下流側から見た水路の断面
図である。FIG. 2 is a cross-sectional view of the water channel of the bag-like weir shown in FIG. 1 viewed from the downstream side.
【図3】図1に示す袋状堰の側断面図である。FIG. 3 is a side sectional view of the bag-like weir shown in FIG.
3 袋状堰 3a 合わせ部 4 止め具 3 bag-like weir 3a mating part 4 stopper
Claims (1)
具を配置し、可撓膜を2つ折りにして合わせ部を密着さ
せ、袋状に形成した堰体の前記合わせ部を前記止め具に
よって固定したことを特徴とする袋状堰の設置構造。1. A stopper is arranged in an arc shape so as to project upstream from the river bed, and the flexible membrane is folded in two to bring the joints into close contact with each other. A bag-like weir installation structure characterized by being fixed by a tool.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP33590395A JPH09151444A (en) | 1995-11-30 | 1995-11-30 | Installation structure for bag type weir |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP33590395A JPH09151444A (en) | 1995-11-30 | 1995-11-30 | Installation structure for bag type weir |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH09151444A true JPH09151444A (en) | 1997-06-10 |
Family
ID=18293666
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP33590395A Pending JPH09151444A (en) | 1995-11-30 | 1995-11-30 | Installation structure for bag type weir |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH09151444A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005264586A (en) * | 2004-03-19 | 2005-09-29 | Mitsubishi Heavy Ind Ltd | Ground-installed membrane-type dike |
US9765495B2 (en) | 2001-07-09 | 2017-09-19 | Henry K. Obermeyer | Water control apparatus |
-
1995
- 1995-11-30 JP JP33590395A patent/JPH09151444A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9765495B2 (en) | 2001-07-09 | 2017-09-19 | Henry K. Obermeyer | Water control apparatus |
US10370813B2 (en) | 2001-07-09 | 2019-08-06 | Henry K. Obermeyer | Water control apparatus |
JP2005264586A (en) * | 2004-03-19 | 2005-09-29 | Mitsubishi Heavy Ind Ltd | Ground-installed membrane-type dike |
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