JP3791992B2 - Discharge method of sediment in the dam reservoir - Google Patents

Discharge method of sediment in the dam reservoir Download PDF

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Publication number
JP3791992B2
JP3791992B2 JP33469596A JP33469596A JP3791992B2 JP 3791992 B2 JP3791992 B2 JP 3791992B2 JP 33469596 A JP33469596 A JP 33469596A JP 33469596 A JP33469596 A JP 33469596A JP 3791992 B2 JP3791992 B2 JP 3791992B2
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sediment
earth
dam reservoir
sand
dam
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JPH10159066A (en
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勝敏 倉谷
忠臣 藤咲
秀浩 杉
道夫 後藤
光男 渋谷
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Fujita Corp
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Fujita Corp
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Description

【０００１】
【発明の属する技術分野】
本発明はダム貯水池の底に堆積する土砂の排出方法に関する。
【０００２】
【従来の技術】
ダム貯水池の底に堆積する土砂は、ダムの貯水量を減少させ、ダムの治水利水機能を低下させるだけではなく、ダム貯水池上流の河床の上昇や、ダム下流での河床の低下などを引き起こす恐れがあり、河川にも悪影響を与える。
そこで、ダム貯水池の底に堆積する土砂を排出するため、従来、ダム貯水池の水位を下げ、ダム貯水池の底を露出させて作業車により堆積土砂を掘削したり、あるいは、渇水等で水位が下がった時に露出するダム貯水池の底を作業車により掘削し、ダム貯水池外に排出するようにしている。
【０００３】
【発明が解決しようとする課題】
しかしながら、ダム貯水池の水位を下げ底を露出させてに堆積土砂を排出する方法では、ダム貯水池の貯水量や、各時期における水使用量等との関係からいつでも堆積土砂を排出できるとは限らず、また、渇水の場合に堆積土砂を排出する方法では、満水の状態が続くと堆積土砂を排出できない。
本発明は前記事情に鑑み案出されたものであって、本発明の目的は、ダム貯水池の貯水量や、水使用量等とは無関係にいつでも堆積土砂を排出できるダム貯水池の堆積土砂の排出方法を提供することにある。
【０００４】
【課題を解決するための手段】
前記目的を達成するため本発明は、ダム貯水池の底に堆積する土砂を排出する方法であって、ダム貯水池に筒体を、その下端をダム貯水池の堆積土砂中に打ち込むと共にその上端を水面の上方に突出させて立設し、前記筒体が堆積土砂中に打ち込まれた部分に開閉可能な複数の土砂取り入れ口を設け、前記ダム貯水池の外側に、下方に延在する土砂搬出路を設け、前記堆積土砂の下方の前記筒体の下部と前記土砂搬出路の下部を接続するスクリューコンベアを設け、前記土砂取り入れ口を開放し、前記土砂取り入れ口から堆積土砂を筒体の内部に流出させ、この堆積土砂を前記スクリューコンベアと前記土砂搬出路内に充填させ、次いで、前記土砂取り入れ口を閉塞し、堆積土砂を前記スクリューコンベアにより前記筒体の下部から前記土砂搬出路の下部に移送すると共に、土砂搬出路内の堆積土砂をバケットにより土砂搬出路の下部から上部へ移送し、ダム貯水池の外側で排出するようにしたことを特徴とする。
また、本発明は、前記土砂搬出路の下部にはポンプが配設され、前記バケットにより積み残された土砂が前記ポンプにより排出管を介してダム貯水池の外側に排出されることを特徴とする。
また、本発明は、前記筒体の上部が、上下方向に伸縮可能な伸縮部により構成され、前記伸縮部の上端に、該伸縮部の上端をダム貯水池の水面上に浮かせる浮体が設けられ、前記伸縮部の上端はダム貯水池の水位に応じて上下動することを特徴とする。
また、本発明は、前記筒体の下部と前記スクリューコンベアとの接続部に開閉弁が設けられていることを特徴とする。
また、本発明は、前記筒体がダム堤体の近傍に立設されることを特徴とする。
【０００５】
本発明では、土砂取り入れ口を開放して堆積土砂を筒体内に流し込み、筒体、スクリューコンベア、土砂搬出路に充填させる。
そして、土砂取り入れ口を閉塞し、スクリューコンベアにより堆積土砂を筒体から土砂搬出路へ移送し、バケットにより堆積土砂を土砂搬出路内の下部から上部へ移送し、ダム貯水池の外側で排出させる。
【０００６】
【発明の実施の形態】
次に本発明の実施例について説明する。
図１は本発明方法が実施されるダム貯水池の断面側面図、図２は同平面図を示す。
２はダム貯水池、４は堤体、６は堤体４に設けられた放流口、８はダム貯水池２の上流側の周囲箇所に設けられた土砂処理設備を示し、土砂処理設備８は沈殿池８０２と濁水処理設備８０４により構成されている。
本発明による堆積土砂の排出方法では、筒体１２と、スクリューコンベア１４と、土砂搬出路１６と、バケットエレベータ１８等が用いられる。
【０００７】
前記筒体１２は、堆積土砂（シルト）２０が最も溜り易い堤体４の近傍で上下に立設され、前記筒体１２として、例えば、鋼管が用いられ、前記筒体１２の下部は、ダム貯水池２の底に堆積した堆積土砂２０中に打ち込まれている。
本実施例では、筒体１２の上部が、上下にスライド可能にかつ水密に結合された複数の筒状分割体１２０２から上下に伸縮可能に構成されている。
そして、最も上端に位置する筒状分割体１２０２Ａの上部の外周部に環状の浮体２２が取着され、前記筒状分割体１２０２の上端がダム貯水池２の水位の変動に対応して上下動し、前記筒状分割体１２０２の上端が常に水面上に位置するように構成されている。
このように筒体１２の上部を伸縮可能に構成すると、伸縮可能に構成しない場合に較べて、水位が下がった場合に、筒体１２が露出しないので外観上見栄えが良く、有利となる。尚、筒体１２の上部を上下に伸縮させる構成は種々考えられ、例えば、蛇腹状のゴムホース等を用いても構成することが可能である。
また、前記筒体１２が堆積土砂２０中に埋設された部分およびその近傍部分には複数の土砂取り入れ口２４が周方向及び上下方向に間隔をおいて複数設けられ、各土砂取り入れ口２４は、筒体１２の内周面或は外周面に配設された蓋板（不図示）により開閉可能である。
【０００８】
前記土砂搬出路１６は前記ダム貯水池２の上流側の周囲箇所でかつ沈殿池８０２の近傍で下方に鉛直に掘削された立坑により構成されている。
前記スクリューコンベア１４はダム貯水池２の底の下方に埋設され、水平に延在して前記筒体１２の下部と土砂搬出路１６の下部を接続している。
前記筒体１２の下部とスクリューコンベア１４が接続される部分には開閉可能な開閉弁２６が設けられている。
前記スクリューコンベア１４は、管体１４０２と、回転軸１４０４と、回転軸１４０４に取着された螺旋状の羽根１４０６から構成され、不図示のモータ等の動力源により回転軸１４０４、羽根１４０６が回転し、堆積土砂２０を筒体１２の下部から土砂搬出路１６の下部へ移送するように構成されている。
【０００９】
前記土砂搬出路１６にはバケットエレベータ１８が設置されている。
前記バケットエレベータ１８は、土砂搬出路１６内に設置されたフレーム１８０２と、フレーム１８０２に沿って配設されたチェーン（不図示）と、チェーンの長手方向に間隔をおいて取着されたバケット１８０４と、チェーンを駆動するモータ等の動力源により構成されている。
前記フレーム１８０２は、土砂搬出路１６の下端から土砂搬出路１６の上方に鉛直に延在する縦部１８０２Ａと、縦部１８０２Ａの上端から土砂処理設備８側に水平に延在する横部１８０２Ｂで構成され、前記チェーンの駆動により、各バケット１８０４がフレームの縦部１８０２Ａの下端から上端へ、上端から横部１８０２Ｂの上面を通って横部１８０２Ｂの先端に、横部１８０２Ｂの先端から横部１８０２Ｂの下面を通って縦部１８０２Ａの上端へ、縦部１８０２Ａの上端から縦部１８０２Ａの下端へと循環するように構成されている。
【００１０】
更に、土砂搬出路１６の下端には、土砂排出用ポンプ３０が配設され、土砂排出用ポンプ３０の駆動により管体３００２を介して、土砂搬出路１６の下端の堆積土砂２０が前記沈殿池８０２に排出されるように構成されている。
【００１１】
次に、上述のような筒体１２と、スクリューコンベア１４と、土砂搬出路１６と、バケットエレベータ１８等を用いて、ダム貯水池２の底に堆積した土砂を排出する手順について説明する。
まず、堆積土砂２０中に位置する土砂取り入れ口２４と、開閉弁２６を開放する。これにより、流動状或は半流動状の堆積土砂２０が土砂取り入れ口２４から筒体１２内に流れ込み筒体１２の下部からスクリューコンベア１４へ、スクリューコンベア１４から土砂搬出路１６へと流入し、筒体１２、スクリューコンベア１４、土砂搬出路１６に充填される。
そして、筒体１２の上部が大気に開放されていることから、筒体１２内の流動状或は半流動状の堆積土砂２０の上面と、土砂搬出路１６内の流動状或は半流動状の堆積土砂２０の上面とが、貯水池２の水面とほぼ同一になるまで堆積土砂が充填される。
このように堆積土砂が筒体１２、スクリューコンベア１４、土砂搬出路１６に充填されたならば、土砂取り入れ口２４を閉塞する。
次に、スクリューコンベア１４とバケットエレベータ１８を駆動し、スクリューコンベア１４によりスクリューコンベア１４内の堆積土砂２０を土砂搬出路１６の下端へ移送し、バケットエレベータ１８の多数のバケット１８０４により土砂搬出路１６内の堆積土砂２０を下方から上方へ移送し、次いで、土砂搬出路１６の上方の地上において水平に移送し、沈殿池８０２に排出する。
【００１２】
このようにして堆積土砂２０を排出し、筒体１２内の土砂がスクリューコンベア１４へ排出されたならば、開閉弁２６を閉塞し、スクリューコンベア１４とバケットエレベータ１８により、スクリューコンベア１４内と土砂搬出路１６内の堆積土砂を移送し、沈殿池８０２へ排出させ、スクリューコンベア１４内と土砂搬出路１６内の堆積土砂が排出されたならば、スクリューコンベア１４とバケットエレベータ１８を停止させる。
そして、バケット１８０４により排出されず、土砂搬出路１６の下部に残留した堆積土砂２０を、土砂排出用ポンプ３０を駆動することで管体３００２を介して沈殿池８０２に排出し、作業を終了する。
このように、筒体１２、スクリューコンベア１４、土砂搬出路１６内の堆積土砂を取り除いた後、前記と同様に、土砂取り入れ口２４と開閉弁２６を開いて土砂取り入れ口２４から堆積土砂を筒体１２内に流出させ、前記と同様な作業を繰り返して行なう。
なお、土砂処理設備８において、沈殿池８０２の土砂はダンプトラック等により適宜箇所に運搬され、また、濁水は濁水処理設備８０４により浄化され、浄化された水がダム貯水池２の上流箇所に放流される。
【００１３】
従って、本実施例によれば、筒体１２と、スクリューコンベア１４と、土砂搬出路１６と、バケットエレベータ１８等を用いてダム貯水池２の底に堆積した土砂を排出するので、ダム貯水池２の貯水量や、水使用量等とは無関係に、いつでも堆積土砂２０を確実に排出することが可能となる。
そして、堆積土砂２０を排出するための筒体１２と、スクリューコンベア１４と、土砂搬出路１６と、バケットエレベータ１８等からなる設備は、ダムの新設時に設置してもよく、或は、既存のダムにも設置することが可能で、新設、既存を問わずに全てのダムに広く適用可能である。
【００１４】
【発明の効果】
以上の説明で明らかなように本発明は、ダム貯水池の底に堆積する土砂を排出する方法であって、ダム貯水池に筒体を、その下端をダム貯水池の堆積土砂中に打ち込むと共にその上端を水面の上方に突出させて立設し、前記筒体が堆積土砂中に打ち込まれた部分に開閉可能な複数の土砂取り入れ口を設け、前記ダム貯水池の外側に、下方に延在する土砂搬出路を設け、前記堆積土砂の下方の前記筒体の下部と前記土砂搬出路の下部を接続するスクリューコンベアを設け、前記土砂取り入れ口を開放し、前記土砂取り入れ口から堆積土砂を筒体の内部に流出させ、この堆積土砂を前記スクリューコンベアと前記土砂搬出路内に充填させ、次いで、前記土砂取り入れ口を閉塞し、堆積土砂を前記スクリューコンベアにより前記筒体の下部から前記土砂搬出路の下部に移送すると共に、土砂搬出路内の堆積土砂をバケットにより土砂搬出路の下部から上部へ移送し、ダム貯水池の外側で排出するようにした。
そのため、ダム貯水池の貯水量や、水使用量等とは無関係に、いつでも堆積土砂を確実に排出することができ、また、筒体と、スクリューコンベアと、土砂搬出路と、バケットエレベータ等を用いて堆積土砂を排出するので、堆積土砂排出のための設備は、ダムの新設時に設置してもよく、或は、既存のダムにも設置することが可能で、全てのダムに広く適用可能である。
【図面の簡単な説明】
【図１】本発明方法が実施されるダム貯水池の断面側面図である。
【図２】本発明方法が実施されるダム貯水池の平面図である。
【符号の説明】
２ ダム貯水池
４ 堤体
８ 土砂処理設備
１２ 筒体
１４ スクリューコンベア
１６ 土砂排出路
１８ バケットエレベータ
２０ 堆積土砂
２４ 土砂取り入れ口
２６ 開閉弁
３０ 土砂排出用ポンプ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for discharging sediment deposited on the bottom of a dam reservoir.
[0002]
[Prior art]
Sediment deposited at the bottom of the dam reservoir not only reduces the amount of water stored in the dam and lowers the water control function of the dam, but also may cause an increase in the river bed upstream of the dam reservoir and a decrease in the river bed downstream of the dam reservoir. There is also an adverse effect on rivers.
Therefore, in order to discharge the sediment deposited on the bottom of the dam reservoir, conventionally, the water level of the dam reservoir is lowered, the bottom of the dam reservoir is exposed and the sediment is excavated with a work vehicle, or the water level is lowered by drought, etc. The bottom of the dam reservoir exposed at the time is excavated with a work vehicle and discharged outside the dam reservoir.
[0003]
[Problems to be solved by the invention]
However, the method of discharging sedimentary sediment by lowering the water level of the dam reservoir and exposing the bottom may not always discharge sedimentary sediment due to the amount of water stored in the dam reservoir and the amount of water used in each period. Moreover, in the method of discharging sedimentary sediment in the case of drought, sedimentary sediment cannot be discharged if the state of full water continues.
The present invention has been devised in view of the above circumstances, and the object of the present invention is to discharge sediment sediment in a dam reservoir that can discharge sediment sediment at any time regardless of the amount of water stored in the dam reservoir, the amount of water used, etc. It is to provide a method.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, the present invention is a method for discharging sediment deposited on the bottom of a dam reservoir, wherein a cylinder is placed in the dam reservoir, its lower end is driven into the sediment of the dam reservoir, and its upper end is A plurality of earth and sand intakes that can be opened and closed are provided at the portion where the cylinder is driven into the sediment, and an earth and sand carry-out passage extending downward is provided outside the dam reservoir. A screw conveyor for connecting the lower part of the cylindrical body below the sedimentary sediment and the lower part of the sediment transport path, opening the sediment intake, and allowing the sediment to flow out into the cylinder from the sediment intake. The sediment is filled into the screw conveyor and the sediment transport path, the sediment intake is then closed, and the sediment is removed from the bottom of the cylinder by the screw conveyor. While transferring the bottom of Detchi, the sediment in the sediment discharge line transferred from the bottom of the sediment discharge line to the top by a bucket, characterized by being adapted to discharge outside the dam reservoir.
Further, the present invention is characterized in that a pump is disposed in a lower part of the earth and sand carrying-out path, and earth and sand left by the bucket are discharged to the outside of the dam reservoir through the discharge pipe by the pump. .
Further, in the present invention, the upper part of the cylindrical body is configured by an elastic part that can be expanded and contracted in the vertical direction, and a floating body that floats the upper end of the elastic part on the water surface of the dam reservoir is provided at the upper end of the elastic part. The upper end of the telescopic part moves up and down according to the water level of the dam reservoir.
Further, the present invention is characterized in that an opening / closing valve is provided at a connection portion between the lower portion of the cylindrical body and the screw conveyor.
Further, the present invention is characterized in that the cylindrical body is erected in the vicinity of a dam dam body.
[0005]
In the present invention, the earth and sand intake is opened to allow sedimentary earth and sand to flow into the cylinder, and the cylinder, screw conveyor, and earth and sand carry-out path are filled.
Then, the earth and sand intake is closed, the sedimentary sediment is transferred from the cylinder to the sediment transport path by the screw conveyor, the sediment is transferred from the lower part to the upper part in the sediment transport path by the bucket, and discharged outside the dam reservoir.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Next, examples of the present invention will be described.
FIG. 1 is a sectional side view of a dam reservoir in which the method of the present invention is carried out, and FIG. 2 is a plan view thereof.
2 is a dam reservoir, 4 is a dam body, 6 is a discharge port provided in the dam body 4, 8 is an earth and sand treatment facility provided at the upstream side of the dam reservoir 2, and an earth and sand treatment facility 8 is a sedimentation basin 802 and muddy water treatment equipment 804.
In the sediment discharge method according to the present invention, the cylinder 12, the screw conveyor 14, the sediment transport path 16, the bucket elevator 18, and the like are used.
[0007]
The cylindrical body 12 is erected up and down in the vicinity of the dam body 4 where sediment sediment (silt) 20 is most likely to accumulate. As the cylindrical body 12, for example, a steel pipe is used, and a lower portion of the cylindrical body 12 is a dam. It is driven into the sediment 20 deposited at the bottom of the reservoir 2.
In the present embodiment, the upper portion of the cylindrical body 12 is configured to be vertically extendable from a plurality of cylindrical divided bodies 1202 that are slidable in the vertical direction and are joined in a watertight manner.
And the annular floating body 22 is attached to the outer periphery of the upper part of the cylindrical divided body 1202A located at the uppermost end, and the upper end of the cylindrical divided body 1202 moves up and down in response to the fluctuation of the water level of the dam reservoir 2. The upper end of the cylindrical divided body 1202 is always positioned on the water surface.
If the upper portion of the cylindrical body 12 is configured to be extendable / retractable in this manner, the appearance of the external appearance is good and advantageous because the cylindrical body 12 is not exposed when the water level is lowered, compared to a case where the upper portion of the cylindrical body 12 is not configured to be expandable / reducible. Various configurations for extending and contracting the upper portion of the cylindrical body 12 are conceivable. For example, the configuration can be configured by using a bellows-like rubber hose or the like.
In addition, a plurality of earth and sand intakes 24 are provided at intervals in the circumferential direction and the vertical direction in the portion where the cylindrical body 12 is embedded in the sedimentary earth and sand 20 and the vicinity thereof. The cylindrical body 12 can be opened and closed by a cover plate (not shown) disposed on the inner peripheral surface or the outer peripheral surface.
[0008]
The earth and sand carry-out path 16 is constituted by a vertical shaft that is vertically excavated in the vicinity of the upstream side of the dam reservoir 2 and in the vicinity of the sedimentation tank 802.
The screw conveyor 14 is buried below the bottom of the dam reservoir 2 and extends horizontally to connect the lower part of the cylindrical body 12 and the lower part of the earth and sand carrying-out path 16.
An open / close valve 26 that can be opened and closed is provided at a portion where the lower portion of the cylindrical body 12 and the screw conveyor 14 are connected.
The screw conveyor 14 includes a tubular body 1402, a rotating shaft 1404, and a spiral blade 1406 attached to the rotating shaft 1404. The rotating shaft 1404 and the blade 1406 are rotated by a power source such as a motor (not shown). The sediment 20 is transferred from the bottom of the cylinder 12 to the bottom of the sediment transport path 16.
[0009]
A bucket elevator 18 is installed in the earth and sand carry-out path 16.
The bucket elevator 18 includes a frame 1802 installed in the sediment transport path 16, a chain (not shown) disposed along the frame 1802, and a bucket 1804 attached at intervals in the longitudinal direction of the chain. And a power source such as a motor for driving the chain.
The frame 1802 includes a vertical portion 1802A that extends vertically from the lower end of the sediment transport passage 16 and above the sediment transport passage 16, and a horizontal portion 1802B that extends horizontally from the upper end of the vertical portion 1802A to the sediment treatment facility 8 side. By driving the chain, each bucket 1804 moves from the lower end to the upper end of the vertical portion 1802A of the frame, from the upper end through the upper surface of the horizontal portion 1802B to the tip of the horizontal portion 1802B, and from the tip of the horizontal portion 1802B to the horizontal portion 1802B. The upper portion of the vertical portion 1802A is circulated from the upper end of the vertical portion 1802A to the upper end of the vertical portion 1802A.
[0010]
Further, a sediment discharge pump 30 is disposed at the lower end of the sediment transport path 16, and the sediment sediment 20 at the lower end of the sediment transport path 16 passes through the pipe body 3002 when the sediment discharge pump 30 is driven. It is configured to be discharged to 802.
[0011]
Next, a procedure for discharging the sediment deposited on the bottom of the dam reservoir 2 using the cylinder 12, the screw conveyor 14, the sediment transport path 16, the bucket elevator 18 and the like as described above will be described.
First, the earth and sand intake port 24 located in the sedimentary earth and sand 20 and the on-off valve 26 are opened. Thereby, the fluidized or semi-fluid accumulated sediment 20 flows into the cylinder 12 from the sediment intake 24 and flows from the lower part of the cylinder 12 to the screw conveyor 14 and from the screw conveyor 14 to the sediment transport path 16. The cylindrical body 12, the screw conveyor 14, and the earth and sand carry-out path 16 are filled.
Since the upper part of the cylindrical body 12 is open to the atmosphere, the fluidized or semi-fluid sedimentary sediment 20 in the cylindrical body 12 and the fluidized or semifluidized condition in the sediment transport path 16 are provided. The sediment is filled until the top surface of the sediment 20 is substantially the same as the water surface of the reservoir 2.
In this way, when the accumulated sediment is filled in the cylindrical body 12, the screw conveyor 14, and the sediment transport path 16, the sediment intake port 24 is closed.
Next, the screw conveyor 14 and the bucket elevator 18 are driven, the accumulated sediment 20 in the screw conveyor 14 is transferred to the lower end of the sediment transport path 16 by the screw conveyor 14, and the sediment transport path 16 by the multiple buckets 1804 of the bucket elevator 18. The accumulated sediment 20 is transferred from below to above, and then horizontally transferred on the ground above the sediment transport path 16 and discharged to the settling basin 802.
[0012]
When the sediment 20 is discharged in this way and the sediment in the cylinder 12 is discharged to the screw conveyor 14, the on-off valve 26 is closed, and the screw conveyor 14 and the bucket elevator 18 are used to close the interior of the screw conveyor 14 and the sediment. The accumulated sediment in the carry-out path 16 is transferred and discharged to the settling basin 802. If the accumulated sediment in the screw conveyor 14 and the sediment transport path 16 is discharged, the screw conveyor 14 and the bucket elevator 18 are stopped.
Then, the accumulated sediment 20 that is not discharged by the bucket 1804 but remains in the lower portion of the sediment transport path 16 is discharged to the sedimentation basin 802 via the pipe body 3002 by driving the sediment discharge pump 30, and the operation is completed. .
In this manner, after removing the accumulated sediment in the cylinder 12, the screw conveyor 14, and the sediment transport path 16, the sediment intake port 24 and the opening / closing valve 26 are opened and the accumulated sediment is removed from the sediment intake port 24 in the same manner as described above. It is caused to flow into the body 12 and the same operation as described above is repeated.
In the sediment treatment facility 8, the sediment in the sedimentation basin 802 is transported to a suitable location by a dump truck or the like, and muddy water is purified by the turbid water treatment facility 804, and the purified water is discharged to a location upstream of the dam reservoir 2. The
[0013]
Therefore, according to the present embodiment, the sediment deposited on the bottom of the dam reservoir 2 is discharged using the cylinder 12, the screw conveyor 14, the earth and sand carry-out path 16, the bucket elevator 18, and the like. Regardless of the amount of water stored, the amount of water used, etc., it is possible to reliably discharge the sediment 20 at any time.
And the installation which consists of the cylinder 12, the screw conveyor 14, the sediment transport path 16, the bucket elevator 18 etc. for discharging sediment earth and sand 20 may be installed at the time of new construction of a dam, or existing It can also be installed in dams, and can be widely applied to all dams, whether new or existing.
[0014]
【The invention's effect】
As is apparent from the above description, the present invention is a method for discharging sediment deposited on the bottom of a dam reservoir, in which a cylinder is placed in the dam reservoir and its lower end is driven into the sediment sediment of the dam reservoir and its upper end is A sediment carrying-out path extending downwards on the outside of the dam reservoir, provided with a plurality of earth and sand intakes that can be opened and closed at the portion where the cylinder is driven into the sedimentary sediment. A screw conveyor for connecting the lower part of the cylindrical body below the sedimentary sediment and the lower part of the sediment transport path, opening the sediment intake, and depositing sediment from the sediment intake into the cylinder The sediment is filled in the screw conveyor and the sediment transport path, the sediment intake is then closed, and the sediment is removed from the bottom of the cylinder by the screw conveyor. While transporting the bottom of the sand-out path, the sediment in the sediment discharge line transferred from the bottom of the sediment discharge line to the top by a bucket, and to discharge outside the dam reservoir.
Therefore, regardless of the amount of water stored in the dam reservoir, the amount of water used, etc., sedimentary sediment can be reliably discharged at any time, and the cylinder, screw conveyor, sediment transport path, and bucket elevator are used. Therefore, facilities for discharging sediment sediment can be installed at the time of new dam construction, or can be installed in existing dams, and can be widely applied to all dams. is there.
[Brief description of the drawings]
FIG. 1 is a cross-sectional side view of a dam reservoir in which the method of the present invention is implemented.
FIG. 2 is a plan view of a dam reservoir in which the method of the present invention is implemented.
[Explanation of symbols]
2 Dam Reservoir 4 Embankment 8 Sediment Processing Equipment 12 Tube 14 Screw Conveyor 16 Sediment Discharge Channel 18 Bucket Elevator 20 Sediment Sediment 24 Sediment Intake 26 On-off Valve 30 Sediment Discharge Pump

Claims (5)

ダム貯水池の底に堆積する土砂を排出する方法であって、
ダム貯水池に筒体を、その下端をダム貯水池の堆積土砂中に打ち込むと共にその上端を水面の上方に突出させて立設し、
前記筒体が堆積土砂中に打ち込まれた部分に開閉可能な複数の土砂取り入れ口を設け、
前記ダム貯水池の外側に、下方に延在する土砂搬出路を設け、
前記堆積土砂の下方の前記筒体の下部と前記土砂搬出路の下部を接続するスクリューコンベアを設け、
前記土砂取り入れ口を開放し、前記土砂取り入れ口から堆積土砂を筒体の内部に流出させ、この堆積土砂を前記スクリューコンベアと前記土砂搬出路内に充填させ、
次いで、前記土砂取り入れ口を閉塞し、堆積土砂を前記スクリューコンベアにより前記筒体の下部から前記土砂搬出路の下部に移送すると共に、土砂搬出路内の堆積土砂をバケットにより土砂搬出路の下部から上部へ移送し、ダム貯水池の外側で排出するようにした、
ことを特徴とするダム貯水池の堆積土砂の排出方法。A method for discharging sediment deposited on the bottom of a dam reservoir,
Put the cylinder into the dam reservoir, and erected the lower end of the cylinder into the sediment of the dam reservoir and project the upper end above the water surface.
Provide a plurality of earth and sand intakes that can be opened and closed in the portion where the cylinder is driven into the sediment,
On the outside of the dam reservoir, a sediment transport path extending downward is provided,
A screw conveyor is provided for connecting a lower portion of the cylindrical body below the sedimentary sediment and a lower portion of the sediment transport path,
Open the earth and sand intake, let the sediment earth and sand flow out from the earth and sand intake to the inside of the cylindrical body, and let this sediment earth and sand fill the screw conveyor and the earth and sand carry-out path,
Next, the earth and sand intake is closed, and the sediment is transferred from the lower part of the cylinder to the lower part of the earth and sand carrying-out path by the screw conveyor, and the earth and sand in the earth and sand carrying-out path is transferred from the lower part of the earth and sand carrying-out path by the bucket. Moved to the top and discharged outside the dam reservoir,
A method for discharging sedimentary sediment from a dam reservoir. 前記土砂搬出路の下部にはポンプが配設され、前記バケットにより積み残された堆積土砂が前記ポンプにより排出管を介してダム貯水池の外側に排出される請求項１記載のダム貯水池の堆積土砂の排出方法。The sediment in the dam reservoir according to claim 1, wherein a pump is disposed at a lower portion of the sediment transport path, and sediment sediment left by the bucket is discharged to the outside of the dam reservoir through a discharge pipe by the pump. Discharge method. 前記筒体の上部は、上下方向に伸縮可能な伸縮部により構成され、前記伸縮部の上端に、該伸縮部の上端をダム貯水池の水面上に浮かせる浮体が設けられ、前記伸縮部の上端はダム貯水池の水位に応じて上下動する請求項１記載のダム貯水池の堆積土砂の排出方法。The upper part of the cylindrical body is constituted by an elastic part that can be expanded and contracted in the vertical direction, and a floating body that floats the upper end of the elastic part on the water surface of the dam reservoir is provided at the upper end of the elastic part. The method for discharging sediment sediment in a dam reservoir according to claim 1, wherein the sediment is moved up and down according to the water level of the dam reservoir. 前記筒体の下部と前記スクリューコンベアとの接続部に開閉弁が設けられている請求項１記載のダム貯水池の堆積土砂の排出方法。The method for discharging sedimentary sediment in a dam reservoir according to claim 1, wherein an opening / closing valve is provided at a connection portion between the lower portion of the cylindrical body and the screw conveyor. 前記筒体がダム堤体の近傍に立設される請求項１記載のダム貯水池の堆積土砂の排出方法。The method for discharging sediment sediment in a dam reservoir according to claim 1, wherein the cylindrical body is erected in the vicinity of the dam dam body.
JP33469596A 1996-11-28 1996-11-28 Discharge method of sediment in the dam reservoir Expired - Fee Related JP3791992B2 (en)

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KR100805159B1 (en) 2007-08-13 2008-02-21 (주)우주엔지니어링 Dam easy to discharge deposit
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JP6394001B2 (en) * 2014-02-24 2018-09-26 株式会社大林組 Earth and sand discharge system and earth and sand discharge method
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