JPH0921127A - Discharge method and equipment of sediment in dam reservoir - Google Patents
Discharge method and equipment of sediment in dam reservoirInfo
- Publication number
- JPH0921127A JPH0921127A JP17072395A JP17072395A JPH0921127A JP H0921127 A JPH0921127 A JP H0921127A JP 17072395 A JP17072395 A JP 17072395A JP 17072395 A JP17072395 A JP 17072395A JP H0921127 A JPH0921127 A JP H0921127A
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- JP
- Japan
- Prior art keywords
- dam
- sediment
- pipe
- sand
- reservoir
- 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.)
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ダム貯水池の堆積
土排出方法及びその装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for discharging sediment from a dam reservoir.
【０００２】[0002]
【従来の技術】ダムには、発電用、灌漑用、洪水調節用
など種々のものがあるが、いずれのダムでも堆砂が発生
し、貯水量の低下を招いており、場合によっては、ダム
本来の機能が消滅する事態も生じている。2. Description of the Related Art There are various types of dams for power generation, irrigation, flood control, etc. However, sedimentation of all dams leads to a decrease in the amount of stored water. There is also a situation where the original function disappears.
【０００３】また、ダムに堆砂することによって、下流
の河川の河床が洗掘され、橋梁基礎や堤防護岸に悪影響
が生じたり、細粒分の流出による動植物への悪影響も発
生し、さらに、海岸においても砂の供給量が減少するこ
とで海岸線の後退による砂浜の消失や護岸の破壊などが
発生する。Further, by depositing sand on the dam, the riverbed of the downstream river is scoured, which adversely affects the bridge foundation and bank protection shore, and the outflow of fine particles also adversely affects plants and animals. A decrease in the sand supply at the coast also causes the beach to disappear due to the retreat of the coastline and the revetments to be destroyed.
【０００４】そこで、ダム湖内の堆砂を排出する必要が
あるが、その方法として、従来は、浚渫機械を使用して
機械的にダム湖底の土砂を汲み上げて陸上の適当な場所
に埋め立てたり、採取した土石材をコンクリート用の骨
材として利用するなどしていた。Therefore, it is necessary to discharge the sediment in the dam lake. Conventionally, as a method therefor, a dredging machine is used to mechanically pump up the sediment at the bottom of the dam lake to reclaim it at an appropriate place on land. The collected earth and stone materials were used as aggregates for concrete.
【０００５】[0005]
【発明が解決しようとする課題】ダム湖底の堆積土は排
出され、貯水量の低下は解消されるが、排出した土砂は
陸上に埋め立てたりされるため、前記のような下流河川
や海岸で発生している問題の解決はなされない。[Problems to be Solved by the Invention] Although the sediment at the bottom of the dam lake is discharged and the decrease in the amount of stored water is eliminated, the discharged sediment is landfilled on land, so it is generated in the downstream rivers and coasts as described above. There is no solution to the problem.
【０００６】本発明の目的は、前記従来例の不都合を解
消し、ダムの貯水量の低下を防ぐことはもちろんのこ
と、ダム下流の河川での河床の洗掘、橋梁基礎や堤防護
岸に及ぼす悪影響、細粒分の流出による動植物への悪影
響などや、海岸線の後退による砂浜の消失や護岸の破壊
など海岸での問題にも対処でき、しかもそのための装置
も簡単で確実に作動するダム貯水池の堆積土排出方法及
びその装置を提供することにある。The object of the present invention is not only to solve the disadvantages of the above-mentioned conventional example and to prevent the decrease of the water storage amount of the dam, but also to the scouring of the riverbed in the river downstream of the dam, the bridge foundation and the bank protection bank. It is possible to deal with adverse effects such as adverse effects on flora and fauna due to the outflow of fine particles, and beach problems such as the disappearance of sand beaches and the destruction of revetments due to the receding coastline, and the equipment for doing so is simple and reliable. It is intended to provide a method and an apparatus for discharging accumulated soil.
【０００７】[0007]
【課題を解決するための手段】本発明は、前記目的を達
成するため、堆積土排出管の一端の吸い込み部をダム貯
水池の上流の湖底に開口し、他端の放水部をダム下流の
河川に開口し、サイホン作用によりダム貯水池内の水と
土砂を汲み上げ、ダム下流に流下させること、及びダム
貯水池内の水と土砂のダム下流への排出は、降雨時に行
うことを要旨とするものである。[Means for Solving the Problems] In order to achieve the above object, the present invention opens a suction part at one end of a sediment discharge pipe to the lake bottom upstream of a dam reservoir and a discharge part at the other end to a river downstream of the dam. The main purpose is to pump water and sediment in the dam reservoir by siphoning and let it flow down the dam, and discharge water and sediment in the dam reservoir to the downstream of the dam at the time of rainfall. is there.
【０００８】また、ダム本体に形成した孔に途中を貫通
させた排砂管の一端の吸い込み部をダム貯水池の上流の
湖底に開口し、該吸い込み部の近傍に水中ポンプを設
け、排砂管の他端の放水部にバルブを設け、該放水部を
ダム下流の河川に開口し、排砂管の一端に形成される吸
い込み部である吸い込み管は、水深の変化に対応できる
よう上下伸縮自在に形成するとともに、フロートによる
作業基地を設け、該作業基地にエアコンプレッサーを配
設し、さらに排砂管は、途中の適宜箇所にフロート及び
水中ポンプを配設することを要旨とするものである。Further, a suction part at one end of a sand discharging pipe penetrating through a hole formed in the dam body is opened at the lake bottom upstream of the dam reservoir, and a submersible pump is provided in the vicinity of the suction part. A valve is provided on the water discharge part at the other end of the sand discharge port, the water discharge part is opened to the river downstream of the dam, and the suction pipe, which is the suction part formed at one end of the sand discharge pipe, can be expanded and contracted vertically to accommodate changes in water depth. In addition to forming a float, a work base is provided with a float, an air compressor is arranged at the work base, and the sand discharge pipe is further provided with a float and a submersible pump at appropriate places on the way. .
【０００９】請求項１記載の本発明によれば、堆積土排
出管の一端の吸い込み部をダム貯水池の上流の湖底に開
口し、他端の放水部をダム下流の河川に開口し、サイホ
ン作用によりダム貯水池内の水と土砂を汲み上げ、ダム
下流に流下させることで、機械的方法ではなく、自然エ
ネルギーを利用してダム貯水池内の水と土砂を排出でき
るから、容易である。また、排出した水と土砂は下流の
河川に放出するから、下流河川や海岸での問題にも対処
できる。According to the first aspect of the present invention, one end of the sediment discharge pipe is opened to the lake bottom upstream of the dam reservoir, and the other end of the discharge pipe is opened to the river downstream of the dam to perform siphon action. By pumping water and sediment in the dam reservoir and flowing it down the dam, it is easy to discharge the water and sediment in the dam reservoir using natural energy instead of using a mechanical method. In addition, the discharged water and sediment are released to downstream rivers, so problems in downstream rivers and coasts can be addressed.
【００１０】請求項２記載の本発明によれば、前記作用
に加えて、ダム貯水池内の水と土砂のダム下流への排出
は、河川の濁り発生を必然的に伴うが、自然に濁りが発
生する降雨時に放出を行うことで、人為的な原因のみに
よる濁り発生を防げる。According to the second aspect of the present invention, in addition to the above-mentioned action, the discharge of water and sediment in the dam reservoir to the downstream of the dam inevitably causes turbidity in the river, but naturally causes turbidity. By releasing it at the time of rainfall that occurs, it is possible to prevent the occurrence of turbidity due to only artificial causes.
【００１１】請求項３記載の本発明によれば、排砂管の
他端の放水部に設けたバルブを閉じ、吸い込み部の近傍
に設けた水中ポンプを作動することで、簡単な装置で排
砂管内を水で充満でき、サイホン作用を容易に発生させ
られる。According to the present invention as set forth in claim 3, the valve provided at the water discharge portion at the other end of the sand discharging pipe is closed, and the submersible pump provided near the suction portion is operated, so that the drainage can be performed with a simple device. The sand pipe can be filled with water, and siphon action can be easily generated.
【００１２】請求項４記載の本発明によれば、前記作用
に加えて、吸い込み部である吸い込み管は、上下伸縮自
在に形成したから、水深の変化に対応でき、常時湖底の
水と土砂を有効に排出できる。According to the fourth aspect of the present invention, in addition to the above-mentioned action, the suction pipe which is the suction portion is formed to be vertically expandable and contractible, so that it is possible to cope with changes in water depth, and it is possible to constantly remove water and sediment from the lake bottom. It can be effectively discharged.
【００１３】請求項５記載の本発明によれば、前記作用
に加えて、吸い込み管にフロートによる作業基地を設
け、該作業基地にエアコンプレッサーを配設すること
で、過去の渇水などが原因で固化した土砂をエアコンプ
レッサーで攪拌して粉砕すると同時にエアーリフト効果
を発揮させることができ、排土効果が高まる。According to the fifth aspect of the present invention, in addition to the above action, a work base by a float is provided in the suction pipe, and an air compressor is arranged in the work base. The solidified earth and sand can be stirred by an air compressor and crushed, and at the same time, the air lift effect can be exerted, and the soil discharge effect is enhanced.
【００１４】請求項６記載の本発明によれば、排砂管の
途中の適宜箇所に水中ポンプを配設することで、管内の
動水勾配を高め所要の流量を確保できる。よって、貯水
池面積が大きく、排砂管延長が長くなって、管内の動水
勾配が低下しても、これに対処できる。According to the sixth aspect of the present invention, by disposing the submersible pump at an appropriate position in the middle of the sand discharge pipe, the hydraulic gradient in the pipe can be increased and a required flow rate can be secured. Therefore, even if the reservoir area is large and the length of the sand discharge pipe is long and the hydraulic gradient in the pipe is reduced, this can be dealt with.
【００１５】[0015]
【発明の実施の形態】以下、図面について本発明の実施
の形態を詳細に説明する。図１は本発明のダム貯水池の
堆積土排出装置の実施形態を示す説明図で、図中１は排
砂管を示し、ダム本体２の上部に穿設した孔３にその途
中を貫通させ、一端の吸い込み部をダム貯水池４の上流
の湖底に開口し、他端の放水部をダム下流の河川５に開
口する。Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an explanatory view showing an embodiment of a sediment reservoir discharging device for a dam reservoir according to the present invention, in which 1 is a sand discharging pipe, and a hole 3 formed in an upper part of a dam body 2 is penetrated in the middle thereof. The suction part at one end opens to the lake bottom upstream of the dam reservoir 4, and the discharge part at the other end opens to the river 5 downstream of the dam.
【００１６】孔３の形成高さは、施工性、維持管理の容
易性と、サイホン作用の有効性を考慮して、洪水吐の高
さのやや下方、例えばΔｈ＝３〜５ｍに設定した。The formation height of the holes 3 is set slightly below the height of the spillway, for example, Δh = 3 to 5 m, in consideration of the workability, the ease of maintenance and the effectiveness of the siphon action.
【００１７】排砂管１は、途中の適宜箇所に必要に応じ
てフレキシブル管１ａを接続し、先端の吸い込み部を形
成する吸い込み管６が上流の適当な位置に配置できるよ
うに図２に示すように全体を配管する。The sand discharging pipe 1 is shown in FIG. 2 so that a flexible pipe 1a is connected to an appropriate place on the way, if necessary, and a suction pipe 6 forming a suction portion at the tip can be arranged at an appropriate upstream position. So that the whole pipe.
【００１８】排砂管１の配管は、途中にフロート７を設
けてダム貯水池４の水上に浮設するとともに、途中の適
宜箇所をアンカーで湖底に係留する。The sand removal pipe 1 is provided with a float 7 on the way to float above the water of the dam reservoir 4, and an appropriate place on the way is anchored to the bottom of the lake by an anchor.
【００１９】排砂管１の飲み口部付近に高圧のタービン
ポンプなどによる水中ポンプ10を設置し、また、排砂管
１の延長が長い場合は、必要に応じて排砂管１の中間部
にも水中ポンプを配設する。一方、排砂管１の他端の放
水部11にはバルブを設ける。なお、水中ポンプ10の電源
は発電機または売電を用いる。If a submersible pump 10 such as a high-pressure turbine pump is installed near the mouth of the sand removal pipe 1, and if the extension of the sand removal pipe 1 is long, an intermediate part of the sand removal pipe 1 may be provided as necessary. Also install a submersible pump. On the other hand, a valve is provided at the water discharge part 11 at the other end of the sand discharge pipe 1. The submersible pump 10 is powered by a generator or power sale.
【００２０】先端の吸い込み管６は、フロートで構成す
る作業基地８を貫通させて先端をダム貯水池４の湖底の
堆砂９に接するように開口する。該吸い込み管６は、水
深の変化に対応できるように上下に伸縮自在に形成し、
ウインチ操作などによって伸縮させる。また、吸い込み
管６が水平移動できるように作業基地８に、扇型に移動
できる旋回装置を設置する。なお、この作業基地８は、
陸上に設置したアンカーを利用して、ウインチ操作によ
って設置位置を決定する。The suction pipe 6 at the tip is penetrated through the work base 8 composed of a float, and the tip is opened so as to come into contact with the sediment 9 on the lake bottom of the dam reservoir 4. The suction pipe 6 is formed so as to be vertically expandable and contractible so as to respond to changes in water depth,
Expand and contract by winch operation. In addition, a swivel device that can move in a fan shape is installed at the work base 8 so that the suction pipe 6 can move horizontally. In addition, this work base 8
An anchor installed on land is used to determine the installation position by winch operation.
【００２１】また、排砂管１の飲み口部付近に、流木や
その他の障害物の吸い込みを防ぐためのスクリーンを設
ける。In addition, a screen for preventing inhalation of driftwood and other obstacles is provided near the mouth of the sand discharging pipe 1.
【００２２】作業基地８に、堆砂を攪拌するためのエア
コンプレッサと動水勾配を高めるための高圧タービンポ
ンプなどによる水中ポンプを設置する。An air compressor for agitating sediment and a submersible pump such as a high-pressure turbine pump for increasing a hydraulic gradient are installed at the work base 8.
【００２３】次にかかる装置を使用してダム貯水池の堆
積土を排出する方法について説明する。排砂管１の放水
部11に設けたバルブを閉じ、飲み口部付近に設けた高圧
のタービンポンプなどによる水中ポンプ10を作動して、
排砂管１内に水を供給して、管内を水で充満させる。Next, a method for discharging the accumulated soil in the dam reservoir by using such a device will be described. The valve provided in the water discharge part 11 of the sand discharge pipe 1 is closed, and the submersible pump 10 such as a high-pressure turbine pump provided near the mouth part is operated,
Water is supplied into the sand discharge pipe 1 to fill the pipe with water.
【００２４】こうして管内のエアを除去した後、水中ポ
ンプ10の作動を停止し、先端の放水部11のバルブを開け
ば、サイホン作用によってダム貯水池４の水と砂が吸い
込み管６から吸い上げられて、排砂管１を通って、放水
部11から下流の河川５に排水される。After the air in the pipe is removed in this way, the operation of the submersible pump 10 is stopped and the valve of the water discharge part 11 at the tip is opened, and the siphon action causes the water and sand in the dam reservoir 4 to be sucked up from the suction pipe 6. The water is discharged from the water discharge part 11 to the downstream river 5 through the sand discharge pipe 1.
【００２５】この場合、ダム貯水池４の面積が大きく、
排砂管１の延長が長くなると、管内の摩擦損失や曲がり
などの損失が大きくなり、その結果、管内の動水勾配が
低下し、サイホン作用だけでは所要の排水量を確保出来
ないときは、吸い込み部や中間部に設けた水中ポンプを
適宜作動して、管内の動水勾配を高め、所要の流量を確
保する。In this case, the area of the dam reservoir 4 is large,
If the length of the sand removal pipe 1 becomes long, the friction loss and bending loss inside the pipe will increase, and as a result, the hydraulic gradient inside the pipe will decrease, and if the siphon action alone cannot secure the required amount of drainage, suction The submersible pump provided in the middle part and the middle part is operated as appropriate to increase the hydraulic gradient in the pipe and secure the required flow rate.
【００２６】また、細粒分の多い堆砂９の場合は、過去
の渇水などが原因でこれが固化していることが多く、粒
径の大きい土砂が混入することもあり、かかる場合は、
排砂効率が極端に低下するおそれがある。これに対して
は、エアコンプレッサを作動して水中に圧縮空気を噴出
させ攪拌させるとともに、エアーリフト効果を発揮させ
土砂の排出効果を高め、管内の摩擦抵抗を低減させて排
砂管１の摩擦による消耗を低減する。Further, in the case of the fine sand 9 containing a large amount of fine particles, this is often solidified due to past drought and the like, and soil with a large particle size may be mixed in. In such a case,
The sand removal efficiency may be extremely reduced. On the other hand, the air compressor is operated to jet and stir the compressed air into the water, and at the same time, the air lift effect is exerted to enhance the sand and sand discharging effect and reduce the friction resistance in the pipe to reduce the friction of the sand discharging pipe 1. Reduce wear due to.
【００２７】同時に水中ポンプ10も作動し、土砂の排出
効果を高める。なお、高圧ウォーターポンプとエアコン
プレッサとの機能を併せ持つ併用ジェット装置を使用
し、または、海域工事の浚渫で使用している浚渫機械を
転用することも可能である。At the same time, the submersible pump 10 also operates to enhance the effect of discharging earth and sand. In addition, it is also possible to use a combined jet device that has both the functions of a high-pressure water pump and an air compressor, or to use a dredging machine that is used for dredging in sea area construction.
【００２８】作業の進行にともない、吸い込み管６の先
端の開口位置を上下にまた水平方向に移動して、また、
作業基地８そのものをウインチで移動して、湖底の堆砂
９を順次排出する。湖底に沈殿している流木その他の障
害物は吸い込み管６に設けたスクリーンで除去され、排
砂管１内に吸い込まれることはない。As the work progresses, the opening position of the tip of the suction pipe 6 is moved vertically and horizontally, and again.
The work base 8 itself is moved by a winch, and the sediment 9 at the bottom of the lake is sequentially discharged. Driftwood and other obstacles that have settled on the bottom of the lake are removed by the screen provided on the suction pipe 6, and are not sucked into the sand discharge pipe 1.
【００２９】かかる下流の河川５への排砂により、下流
の河川５では一時的に濁りが発生するが、自然に濁りの
発生する降雨時に排砂することで、人為的な原因のみに
よる濁りの発生を阻止でき、下流側住民に対して及ぼす
影響を最小限に止めることができる。The sand discharged to the downstream river 5 causes temporary turbidity in the downstream river 5. However, when the sand is discharged during the rainfall when the turbidity naturally occurs, the turbidity is caused only by an artificial cause. The occurrence can be stopped, and the impact on the downstream people can be minimized.
【００３０】また、ひとつの河川で複数のダムが存在す
る場合は、各ダム毎に排砂管１を配置し、直列的に排砂
する。When a plurality of dams exist in one river, the sand discharging pipe 1 is arranged for each dam and sand is discharged in series.
【００３１】さらに、ダム規模が大きく、湖水面が大き
くなって排砂管１の延長も５〜１０Ｋｍと長くなると、
サイホン作用を働かせにくくなるが、このような場合
は、ダム貯水池４内の適当な箇所、浚渫用のポンプ船で
浚渫した土砂を例えばダム上流５００ｍ以内まで運搬仮
置きし、洪水時にサイホン原理を用いて一気に排出する
こともできる。Furthermore, when the dam scale is large, the lake surface is large, and the length of the sand removal pipe 1 is 5 to 10 km,
Although it becomes difficult to activate the siphon action, in such a case, the appropriate location in the dam reservoir 4 and the sediment dred by the dredging pump ship should be transported and placed temporarily, for example, within 500 m upstream of the dam, and the siphon principle should be used during flooding. It can also be discharged all at once.
【００３２】なお、土砂を排出するために必要な流速
は、開水路における限界掃流力の式を流用することによ
り下記のようにして求める。The flow velocity required to discharge the earth and sand is determined as follows by applying the formula of the limit scavenging force in the open channel.
【００３３】今排出する土砂の最大粒径を拳大（約10cm
径）と想定する。 限界掃流力流連ＶｃThe maximum particle size of the earth and sand discharged now is the size of a fist (about 10 cm
Diameter). Limiting sweep force Vc
【数１】 ここに Ｖｃ：限界掃流流速（cm/sec) β：常数( β≒0.06) ｆ：摩擦常数（ｆ≒0.03) ρO ：土砂の密度（ρO ＝2.60) ρW ：水の密度（ρO ＝1.00) ｇ：重力の加速度（ｇ＝980cm/sec2) ｄ：土砂の粒径（ｄ＝10cm)[Equation 1] Where Vc: Critical flow velocity (cm / sec) β: Constant (β ≈ 0.06) f: Friction constant (f ≈ 0.03) ρ O : Sediment density (ρ O = 2.60) ρ W : Water density (ρ O = 1.00) g: acceleration of gravity (g = 980cm / sec 2 ) d: particle size of earth and sand (d = 10cm)
【数２】 したがって、拳大の土砂を排出するには管内流速をＶｃ
＝5.0m/sec以上を確保する必要がある。[Equation 2] Therefore, in order to discharge fist-sized earth and sand, the pipe flow velocity should be Vc.
= 5.0m / sec or more must be secured.
【００３４】仮に土砂径をｄ＝2.0cm 程度とすると流速
は以下のようになる。If the soil diameter is d = 2.0 cm, the flow velocity is as follows.
【数３】 (Equation 3)
【００３５】管内流速はマニングの式によって求める。 ここに Ｖ：平均流速（m/sec) ｎ：粗度係数（ｎ＝0.015) Ｒ：径深（ｍ） Ｉ：動水勾配 有効落差 サイホンの原理を有効に利用するため、有効落差は ΔＨ＝8.0 ｍ とする。The flow velocity in the pipe is obtained by the Manning equation. Where: V: Average flow velocity (m / sec) n: Roughness coefficient (n = 0.015) R: Diameter depth (m) I: Hydraulic gradient effective head Effective head is ΔH = to effectively use the siphon principle. It will be 8.0 m.
【００３６】 [0036]
【００３７】以上の計算結果から、管内流速をＶ＝5.0
ｍ以上を確保しようとすると配管延長はＬ＝500 ｍ程度
で管径φ2.0mが必要となる。このような条件に適合する
箇所を捜すのは非常に難しいので排出土砂としてはφ2.
0cm 程度を目標にすると配管延長約２kmで管径φ1,500m
m が必要となる。From the above calculation results, the flow velocity in the pipe is V = 5.0.
In order to secure more than m, the pipe extension is L = 500 m and the pipe diameter φ2.0 m is required. Since it is very difficult to find a place that meets such conditions, the diameter of the discharged sand is φ2.
If the target is about 0 cm, the pipe length is about 2 km and the pipe diameter is φ1,500 m.
m is required.
【００３８】[0038]
【発明の効果】以上述べたように本発明のダム貯水池の
堆積土排出方法及びその装置は、ダムの貯水量の低下を
防ぐことはもちろんのこと、ダム貯水池内の堆砂をダム
下流の河川に排出することで、ダム下流の河川での河床
の洗掘、橋梁基礎や堤防護岸に及ぼす悪影響、細粒分の
流出による動植物への悪影響などや、海岸線の後退によ
る砂浜の消失や護岸の破壊など海岸での問題にも対処で
き、しかもそのための装置もサイホン作用を利用する簡
単なもので足り、確実に作動するものである。INDUSTRIAL APPLICABILITY As described above, the method and the apparatus for discharging the accumulated soil of the dam reservoir of the present invention not only prevent the decrease of the amount of water stored in the dam, but also prevent the sediment in the dam reservoir from flowing into the river downstream of the dam. Discharge to the river, scouring the riverbed in the river downstream of the dam, adversely affecting the bridge foundation and dike protection shore, adversely affecting flora and fauna due to the outflow of fine particles, etc. It is possible to deal with problems on the beach, etc., and a simple device using the siphon action is sufficient, and it works reliably.
【図１】本発明のダム貯水池の堆積土排出装置の実施形
態を示す説明図である。FIG. 1 is an explanatory diagram showing an embodiment of a sediment discharge device for a dam reservoir according to the present invention.
【図２】本発明のダム貯水池の堆積土排出装置の実施形
態を示す平面図である。FIG. 2 is a plan view showing an embodiment of a deposited soil discharge device for a dam reservoir according to the present invention.
【図３】本発明のダム貯水池の堆積土排出装置の実施形
態を示す要部である吸い込み管の正面図である。FIG. 3 is a front view of a suction pipe, which is a main part, showing an embodiment of the accumulated soil discharge device for a dam reservoir according to the present invention.
１…排砂管 １ａ…フレキシブル
管 ２…ダム本体 ３…孔 ４…ダム貯水池 ５…河川 ６…吸い込み管 ７…フロート ８…作業基地 ９…堆砂 10…水中ポンプ 11…放水部1 ... Sand removal pipe 1a ... Flexible pipe 2 ... Dam body 3 ... Hole 4 ... Dam reservoir 5 ... River 6 ... Suction pipe 7 ... Float 8 ... Work base 9 ... Sediment 10 ... Submersible pump 11 ... Water discharge part
Claims (6)
貯水池の上流の湖底に開口し、他端の放水部をダム下流
の河川に開口し、サイホン作用によりダム貯水池内の水
と土砂を汲み上げ、ダム下流に流下させることを特徴と
するダム貯水池の堆積土排出方法。1. A suction port at one end of the sediment discharge pipe is opened at the lake bottom upstream of the dam reservoir, and a discharge part at the other end is opened at the river downstream of the dam, and siphon action is used to remove water and sediment in the dam reservoir. A method of discharging sediment from a dam reservoir, which is characterized by pumping it up and flowing it down the dam.
排出は、降雨時に行う請求項１記載のダム貯水池の堆積
土排出方法。2. The method for discharging accumulated sediment from a dam reservoir according to claim 1, wherein the water and sediment in the dam reservoir are discharged downstream of the dam during rainfall.
た排砂管の一端の吸い込み部をダム貯水池の上流の湖底
に開口し、該吸い込み部の近傍に水中ポンプを設け、排
砂管の他端の放水部にバルブを設け、該放水部をダム下
流の河川に開口することを特徴とするダム貯水池の堆積
土排出装置。3. A sand drainage pipe is provided with a suction part at one end of a sand discharge pipe penetrating through a hole formed in a dam main body, opened at the lake bottom upstream of a dam reservoir, and an underwater pump is provided in the vicinity of the suction part. A valve is provided at the water discharge part at the other end of the dam, and the water discharge part is opened to a river downstream of the dam, and the accumulated soil discharging device for dam reservoir.
ある吸い込み管は、水深の変化に対応できるよう上下伸
縮自在に形成した請求項３記載のダム貯水池の堆積土排
出装置。4. The sediment discharge device for a dam reservoir according to claim 3, wherein a suction pipe, which is a suction portion formed at one end of the sand discharge pipe, is formed so as to be vertically expandable and contractible so as to cope with a change in water depth.
地を設け、該作業基地にエアコンプレッサーを配設する
請求項４記載のダム貯水池の堆積土排出装置。5. The sediment discharge device for a dam reservoir according to claim 4, wherein the suction pipe is provided with a work base for floats, and the work base is provided with an air compressor.
び水中ポンプを配設する請求項３記載のダム貯水池の堆
積土排出装置。6. The sediment discharge device for a dam reservoir according to claim 3, wherein the sand discharge pipe is provided with a float and an underwater pump at appropriate places on the way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17072395A JPH0921127A (en) | 1995-07-06 | 1995-07-06 | Discharge method and equipment of sediment in dam reservoir |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17072395A JPH0921127A (en) | 1995-07-06 | 1995-07-06 | Discharge method and equipment of sediment in dam reservoir |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0921127A true JPH0921127A (en) | 1997-01-21 |
Family
ID=15910204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17072395A Pending JPH0921127A (en) | 1995-07-06 | 1995-07-06 | Discharge method and equipment of sediment in dam reservoir |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0921127A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004316275A (en) * | 2003-04-17 | 2004-11-11 | Toa Harbor Works Co Ltd | Disposal method of dam sedimentary sand and soil |
| CN100460602C (en) * | 2005-11-08 | 2009-02-11 | 四川希望深蓝电力有限公司 | Sand discharging construction for diversion tunnel forebay |
| JP2010134618A (en) * | 2008-12-03 | 2010-06-17 | Okayama Univ | Sand bypassing selection support method and sand bypassing selection support apparatus |
| CN102168413A (en) * | 2010-02-26 | 2011-08-31 | 浙江大学 | Water gate structure used in reclamation of land from sea and dam construction and exchanging method of water body in reclaimed area of dam |
| JP2014169602A (en) * | 2013-03-05 | 2014-09-18 | Ohbayashi Corp | Sand discharging method and sand discharging apparatus |
| JP2015135056A (en) * | 2010-12-22 | 2015-07-27 | 大成建設株式会社 | Device and method for accumulating dam sediment |
| CN105887771A (en) * | 2016-04-14 | 2016-08-24 | 西北农林科技大学 | Construction method for flood storage and sediment ejection siphoning type labyrinth weir |
| JP2017137752A (en) * | 2016-01-29 | 2017-08-10 | 株式会社山辰組 | Siphon water supply device and siphon water supply method |
-
1995
- 1995-07-06 JP JP17072395A patent/JPH0921127A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004316275A (en) * | 2003-04-17 | 2004-11-11 | Toa Harbor Works Co Ltd | Disposal method of dam sedimentary sand and soil |
| CN100460602C (en) * | 2005-11-08 | 2009-02-11 | 四川希望深蓝电力有限公司 | Sand discharging construction for diversion tunnel forebay |
| JP2010134618A (en) * | 2008-12-03 | 2010-06-17 | Okayama Univ | Sand bypassing selection support method and sand bypassing selection support apparatus |
| CN102168413A (en) * | 2010-02-26 | 2011-08-31 | 浙江大学 | Water gate structure used in reclamation of land from sea and dam construction and exchanging method of water body in reclaimed area of dam |
| JP2015135056A (en) * | 2010-12-22 | 2015-07-27 | 大成建設株式会社 | Device and method for accumulating dam sediment |
| JP2014169602A (en) * | 2013-03-05 | 2014-09-18 | Ohbayashi Corp | Sand discharging method and sand discharging apparatus |
| JP2017137752A (en) * | 2016-01-29 | 2017-08-10 | 株式会社山辰組 | Siphon water supply device and siphon water supply method |
| CN105887771A (en) * | 2016-04-14 | 2016-08-24 | 西北农林科技大学 | Construction method for flood storage and sediment ejection siphoning type labyrinth weir |
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