JPH11131457A - Water intake and fishway juxtaposition dam - Google Patents

Abstract

(57) [Summary] [Problem] To provide a high dam with a selective water intake device and a fishway device that follows upstream water level fluctuations. SOLUTION: An intake gate 15 for connecting a door body in an interdigitated manner is provided at a lower part of an operation room 12 protruding on an upstream side of a high dam,
A circular passage 34 opened at the lower part of the operation room 12 and connected to the inside of the intake gate 15 is connected to the lower part of the circular passage. The hot water whose surface is withdrawn by the automatic constant flow rate device 74 is caused to flow down the fishway, and the upper part of the guide frame extending from the water storage surface is also opened to the operation room. Transport cage 36 for storing fish
Will be moved inside the circular aisle, the control room and the guide frame to support upstream and descending fish. As a result, since both devices are installed side by side, construction costs are saved, and heavy equipment is also used.
Maintenance after construction can be concentrated and workability is good. In addition, the attracting action of the fish by the hot water intake flow and the jet flow is obtained, and the movement of the fish is supported by the appropriate gradient and the transport cage.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION Conventionally, it has been recommended to install a fishway when constructing a dam. In addition, an intake gate, a water control gate, and the like are provided as the original water intake device for dam storage water, and a fishway, a water intake gate, a water control gate, and the like have been independently developed. The present invention relates to a water intake and fishway juxtaposition dam having an intake facility and a fishway.

[0002]

2. Description of the Related Art As a water intake system for a dam with a high levee (high dam), the depth of the water stored in the dam is used to secure the quality of the stored water.
Selective water intake device that draws water from any water level as required from each layer of fresh water), middle layer (for cold water, turbidity measures during floods), and lower layer (water intake for turbid water measures and eutrophication measures during floods). May be added.

Conventionally, there are a linear multistage gate and a semicircular multistage gate as a selective water intake device. In these, a door is continuously installed in the vertical direction to form a gate, and water can be taken by opening a space between any doors. For example, as shown in FIGS. 25 and 26, two opening / closing devices 2 are provided at the upper end of the embankment body 1, and the wires 4 wound around the respective drums 3 of the opening / closing device 2 hang down to form five-stage doors. Body a, b, c,
Among d and e (hereinafter, a,...), they are connected to the door a and the door e. Further, a screen 5 is stretched on the reservoir side of the door body (a,...). Further, the opening and closing device 2 is provided above a pair of piers 6 protruding toward the reservoir, and a door stop 7 is formed inside the pair of piers 6, and the door body (a,...)
I support. Reference numeral 8 is a water control gate, and reference numeral 9 is a security gate.

In order to take water from such a dam, as an example, the upper layer water is taken by the opening / closing device 2 so that the entire door (a,.
・). For water intake of the middle layer, the doors a, b, c, d are lowered to the middle layer intake position, and water is taken from there. In addition, the lower layer water intake moves the lowermost door body e upward to take the lower layer water from the upper surface of the civil engineering structure and the space at the lower end of the door body e. When the water level decreases, the door a is lowered while keeping the overflow water depth constant, and upper layer water is taken.

[0005] On the other hand, as an example of a fishway attached to a dam, there is a fixed step-type fishway. In this method, a plurality of partition walls are installed at regular intervals in the fishway, and the slope is adjusted to be suitable for going up. The water surface of the fishway has a stepped shape. Therefore, the slope of the fishway is gentle, and in the case of a high dam, the passage length of the fishway becomes long, so that sufficient installation space is secured. The fishway shown in FIG. 27 uses a fixed staircase type fishway 10, a power chute fishway 11 is provided on the upstream side, and an operation room 12 is provided.
The opening / closing device 2 for operating the water control gate 8 and the spare gate 13 is provided. In this fishway, even if the water level of the dam reservoir 14 fluctuates, the gradient of the power chute fishway 11 automatically changes, so that the fish does not hinder the run-up.
In addition, as a fishway to be installed at the dam, a transport cage for storing fish is hung with wires, and the transport cage is moved up and down to support fish going upstream (cableway type, elevator type).
Etc.

[0006]

The provision of a fishway facility in a high dam has been proposed by Japanese Patent Application No. 8-334729, but this fishway facility has a fixed step-type fishway in a bank. It is a combination of elevator-type fishways provided continuously. According to this fishway facility, it is possible to support the ascent and descent of fish even if the water level fluctuation of the storage water surface is large. However,
Since the dam's original water intake equipment is assembled using a frame at a different location, if the fishway equipment is constructed separately, the construction period will be prolonged and construction costs will increase. Therefore, the common part of the water intake equipment and the fishway equipment is used to shorten the construction and reduce the cost.

It is an object of the present invention to provide a water intake and fishway juxtaposition type dam at a high bank dam.

[0008]

According to the present invention, in order to achieve the above object, the invention according to claim 1 is provided with a pier projecting toward a reservoir of a dam embankment, and supported by the pier for fish transportation. A closed cross-section passage body and an open cross-section passage body capable of accommodating and elevating the cage are respectively arranged in a vertical direction, and a lower end of the passage of the closed cross-section passage body is connected to a fish passage in a bank open downstream of the dam, and an upper end is formed of the pier. The lower end of the passage of the open section passage body is fixed to the concrete foundation slab under the pier, the upper end is connected to the operation room, and the hoisting traveling device provided in the operation room is connected to the operation room provided above. The two passages are communicated with each other through the pier, and an intake gate is provided in parallel with the pier, and a part of the intake water of the intake gate is caused to flow down to the fishway in the embankment.

According to a second aspect of the present invention, in the first aspect of the present invention, a priming pipe for discharging running water to an inlet of a fishway in the embankment is connected to an intake section of the intake gate via an automatic constant flow rate device. A water pipe connected to a steel damper installed upstream of the fishway in the embankment is connected.

According to a third aspect of the present invention, in the first aspect of the present invention, a floating block is connected to the open sectional passage body in contact with the water surface of the reservoir so as to be vertically movable on the left and right construction surfaces,
The floating block is equipped with a fish collecting device such as an illumination lamp and flushing watering, and the downstream side door of the fish transport cage is provided with a device for generating horizontal jet water.

According to a fourth aspect of the present invention, there is provided a pair of piers protruding toward the reservoir of the dam embankment, an intake gate provided between the piers, and a fish transport cage supported by one of the piers. Closed cross-section passage bodies that can be raised and lowered are arranged side by side in the vertical direction,
The lower end of the passage of the closed cross-section passage body is connected to a fish passage in the levee opening to the downstream of the dam, and the upper end is connected to an operation room provided on the pier, and the other pier supports a cage for transporting fish and moves up and down. Possible open section passage bodies are vertically arranged side by side, and the lower end of the passage of the open section passage body is fixed to a concrete foundation slab under the pier, and the upper end is connected to the operation room, and the winding provided in the operation room. Connecting the two passages via the upper traveling device, constructing an L-shaped wall surface immediately before the intake gate and forming an L-shaped bypass water passage, accommodating the open-section passage body in the bypass water passage, An underwater mixer pump that follows water level fluctuations is provided at the downstream end of the bypass water channel.

As described above, in the fishway intended for the high dam, by coping with the height difference and by being prevented from being affected by the fluctuation of the water level on the upstream side, in the present invention, the fixed stair-type system is provided in the embankment. By installing a fishway, the installation space is not required on the outside ground, and by combining the elevator type fishway and the hoisting traveling device, the fish transport cage moves along the reverse U-shaped path of ascending, traversing, descending, It enables round-trips to fluctuating altitudes. In addition, a floating block is provided upstream for fish falling, and fish collection is facilitated by sprinkling or horizontal jet flow with the fish transport cage stopped at the surface of the reservoir. Furthermore, since the selective water intake facilities are provided in parallel, since there is a common part in construction, heavy equipment can be shared with each other, and the maintenance and inspection points are located next to each other, so that efficiency is improved. In addition, a flow that is effective in attracting fish is generated by water intake, and can be adapted to the fish ecosystem by hot water intake.

[0013]

Embodiments of the present invention will be described below with reference to the accompanying drawings. First, the outline of the high dam will be described with reference to FIGS. As shown in FIGS. 1 and 2, an operation room 12 is provided above a pier 6 protruding toward the reservoir 14 of the embankment 1 constituting the high dam, and the intake gate 15 is opened by the switchgear 2 installed inside the operation room 12. It is designed to open and close. As shown in FIGS. 7 and 8, the intake gate 15 is a semi-circular multi-stage type. In the embodiment, doors a, b, c, and d (four stages) having a semi-circular cross section are used. Intake gate 1
A screen frame 16 is provided around 5, and a dustproof screen 17 is provided. Reference numeral 16a is a scaffold for maintenance and inspection.

As shown in FIG. 4, FIG. 5, and FIG. 7, a drainage pipe 18 disposed downstream is provided in the embankment body 1 at a lower portion inside the water intake gate 15 and the pier 6. A water control gate (repair gate) 8 is attached. The water control gate 8 is operated by the hoist 2b in the operation room 12. The security gate 9 provided outside the lower part of the pier 6
It is moved up and down by the hoisting machine 2c arranged in the operation room 12 (see FIG. 10). A discharge water channel 19 is formed continuously on the downstream side of the water discharge pipe 18, a water discharge facility 20 is provided at a connection between the water discharge pipe 18 and the discharge water path 19, and a main gate 21 and a sub-gate 22 are provided. Have been.

Normally, the water control gate 8 is hung by a rest hook below the floor of the operation room 12 to perform maintenance and inspection of the water discharge pipe 18, the water discharge facility 20, and the discharge water channel 19 provided downstream of the water intake section. Then, it is lowered from the rest position, and the drinking water outlet pipe 18 is closed. The security gate 9 has a built-in gate 9a that opens automatically when the difference between the inside and outside water levels of the water intake section becomes larger than a design value. When the water level difference between inside and outside reaches the specified value, it is automatically shut off and the design water level difference is maintained. Reference numeral 26 denotes a low water intake gate. At the time of maintenance and inspection of the water discharge facility 20, in order to secure water for river maintenance,
A bypass pipe 23 (see FIGS. 5 and 9) that bypasses the main / sub gates 21 and 22 is provided side by side. In addition, bypass pipe 2
3 is provided with main / sub valves 24 and 25. In addition,
Reference numeral 54 in FIGS. 4 and 5 denotes an air tube.

In addition to the intake gate 15 at the high dam,
Since a fishway is provided, its outline will be described with reference to FIGS.

As shown in FIGS. 1 and 2, a fixed step-type fishway 10 having a rectangular cross section is formed in the embankment body 1, and the fishway entrance of the step-type fishway 10 is upstream of a damping work 27 downstream of the high dam. And enters the embankment body 1 at an angle to the flow guide wall of the energy damper 27. In addition, a secondary dam 28
Is provided and a water flow is formed in the tunnel portion. In addition, construction cost can be suppressed by forming the stairs type fishway 10 with a circular lined steel pipe. In addition, a priming pipe 29 is disposed in parallel with the stepped fishway 10 so that priming water is discharged at the fishway entrance.

A fishway control gate 30 is provided near the entrance of the fishway. The waterway (fishway) is curved further upstream to form a straight waterway upstream. Further, the waterway is connected to a fish collecting tank 31 arranged at the lower center in the embankment body 1 through two curved portions. The stairway fishway is provided with partition walls 32 at regular intervals, the fishway slope is set at an angle suitable for fish going up, and illumination lights 33 are installed at regular intervals on the ceiling over the entire length. The upstream side of the fish collecting tank 31 is connected to a vertical passage 35 (see FIG. 4) formed in the foundation concrete below the circular transfer passage (closed passage member) 34 arranged in parallel with the intake gate 15. That is, as shown in FIGS. 2 and 7A, the circular passage 34 and the vertical passage 35 are provided vertically in the center of the inside of the intake gate 15, and the inside of the passage has a fish transport cage 36. Is designed to move up and down. The route to the lower part of the circular passage 34 of the stepped fishway 10 is determined in consideration of the strength of the embankment.

As shown in FIGS. 1 and 4, a fish collecting tank 31 is provided on a lower side surface of the vertical passage 35, and a steel energy damper 37 is installed opposite to the fish collecting tank 31. The upper end of the circular passage 34 opens into the operation room 12.

As shown in FIG. 2, FIG. 3, and FIG. 10, the operation room 12 protrudes toward the reservoir, the floor surface is at the same level as the top of the dam, and the intake gate 15 and the cage 36 are transported below the dam. Guide frames (open-section passage bodies) 38 are juxtaposed and vertically mounted. Further, a hoisting traveling device 39 is provided in the operation room 12. The hoisting traveling device 39 includes a carriage 41 on which a hoist of the cage 36 is mounted, and rails 40 necessary for moving the cage 36 below the carriage 41 between the center of the circular passage 34 and the guide frame 38. . The guide frame 38 is extended to the lower part of the embankment body 1, and a floating block (floating body) 42 is freely attached to a position corresponding to the water surface so as to follow the water level.

Next, details of the intake gate 15 and its surroundings will be described. As shown in FIGS. 4, 6, and 7A,
The uppermost door body a, the middle door bodies b and c, and the lowermost door body d overlap between the pair of piers 6 in order from the inside, and the rollers 43 of each door body are laid in the rail 44 embedded in the bank body 1. Is engaged. As shown in FIGS. 4 and 6, the mouth (water intake plate) 45 of the uppermost door body a of the intake gate 15 has a bell mouth shape (surrounding wall is outward (centrifugal direction)) that creates a hydraulically good flow. (In the form of a bent arc), and in this case, the minimum water level L. W. L
To the intake board 45 is the intake depth h. The intake gate 15 follows the water level fluctuation while always maintaining the intake depth h. In addition, pulleys 46 are provided on the left and right of the lower part of the water intake plate on the uppermost door body a, and a lifting hook 48 is provided outside the pulley 46 to be engaged with the lowermost door body d (pin 47). An automatic fitting / unloading counterweight 49 is provided.

As shown in FIG. 6, an upper stiffening girder 50 and a lower stiffening girder 51 are formed on each door body.
A watertight rubber 52 is attached to the lower part of. Normally, the lower door stiffening girder 51 of the uppermost door a is attached to the middle door b.
The upper stiffening girder 50 is hooked, and the upper stiffening girder 50 of the next middle door c is hooked on the lower stiffening girder 51 of the door body b in the middle. Door c in the middle
The upper stiffening girder 50 of the lowermost door body d is hooked on the lower stiffening girder 51, and is arranged in an interdigital shape as a whole shape.
As shown in FIGS. 6 and 7B, the watertight state is such that the lower end watertight rubber 52 of the lowermost door body d contacts the door stop 53 buried in the foundation concrete, and the door body is located between the door bodies. Inter-watertight rubber 52a, side watertight rubber 52b, door stop side watertight rubber 5
2c, the door stop 53a and the inter-door groove closing plate 53b.

Next, details of the fishway and its surroundings will be described. The cage 36 is made of a steel plate, and as shown in FIGS. 14 to 17, arc-shaped side doors 54 are provided on both side walls corresponding to the upper and lower surfaces, and an opening / closing device 55 of the side door 54 is attached to the upper frame of the cage. Is provided. A water sprinkling device 56, a fish collecting lamp 57, and a pulley 58 are provided on the upper frame of the cage, and a horizontal jet injection pipe 59 is provided on the downstream side wall door 54.

The fish collecting tank 31 is provided at a fixed length as shown in FIG. 4, and serves as a place for gathering and resting the fish that have gone up the stairs-type fishway 10. As shown in FIGS. 4 and 18, a pair of rails 61 of the hunting device 60 are provided on the edge formed on both sides of the upper surface of the fish collecting tank 31. On the carriage 62 of the driving device 60, an insertion device 64 for putting the driving net 63 into the water of the fish collecting tank 31 is mounted.

The inside of the circular passage 34 is constructed to be safe against vertical loads, hydraulic loads and seismic loads. That is, as shown in FIGS. 7 and 8, the steel floor plate 65 is always placed at a position higher than the full water level (upper part of the screen frame 16).
Between the circular passage 34 and the upper portion of the circular passage 34.
The circular passage 34 is fixed to the middle part 4 by a steel connecting member 66 having a streamlined flat cross section so as not to disturb the flow of the intake flow. The steel floor plate 65 also serves as a scaffold for maintenance and inspection of the intake gate 15 and the water control gate 8. Behind the circular passage 34 (on the downstream side with respect to the water flow), a symmetrical rectifying plate 67 having a vertical surface formed of a lining steel plate on the outer periphery and connecting the downstream end thereof is provided. And a concrete bell filled with concrete.
Further, as described above, the lower portion of the circular passage 34 is fixed with the foundation concrete.

A guide frame 38 juxtaposed to the intake gate 15
Has four erected main pillars, and has a truss structure using steel pipes, and a cage 36 can move up and down inside the truss structure. As shown in FIG.
8 are hooked to the main pillars on both sides of the upstream side of the frame, and hook rails 69 of the artificial water channel for fish 68 are welded, and guide rails 70 for connection of the floating block 42 are attached to both main pillars on the left and right sides of the frame of the guide frame 38. Is welding. On both main pillars on the upstream side of the frame, a flat circular tube 38a is used as a horizontal connecting member, and rails 71 are provided on the left and right at the center inside the guide frame 38,
The vertical movement of the cage 36 is stabilized. Further, a fish guiding net 72 is attached to the left and right inside the frame upstream surface.

As shown in FIG. 1, FIG. 2, FIG. 5, and FIG. 9, an inspection corridor 73 is provided in the embankment 1, and an automatic constant flow rate device 74 is provided on the edge of the inspection corridor 73. Water discharge facility 20 is provided. The automatic constant flow device 74 is provided with a supply pipe 75 (see FIG.
And a pump 76, a flow setting valve,
Cylinder and pressure regulating valve are installed side by side.
The effluent from is connected to a steel damper 37 by a water guide pipe 77, and the water guide pipe 77 branches before connecting to the steel damper 37 and is connected to a priming pipe 29.

As shown in FIG. 9 and FIG.
Penetrates the left bank side wall of the lowermost box-shaped chamber 78 of the steel energy dissipator 37 in which the box-shaped chamber 78 of 4 to 5 steps is formed in the height direction. Is closed. As shown in FIGS. 12 and 13, the water pipe 77 penetrating the box-shaped chamber 78 has an orifice hole 79 at an intermediate position between upper, lower, left and right in the circumferential direction. As shown in FIG. 11, the steel energy dissipator 37 has an arc-shaped side wall 80, and a baffle plate 81 having orifice holes 79 formed at a constant vertical and horizontal pitch is attached to the ceiling of the lowermost box-shaped chamber 78. (See FIG. 11 (a).) Further, orifice holes 79 are arranged on the baffle plate 81 at a position shifted by 1/2 pitch alternately (see FIG. 11 (b)).
reference). In this way, a plurality of baffle plates 81 are mounted with the orifice holes 79 shifted by ピ ッ チ pitch. In addition,
A drain hole 82 is formed at the edge of the baffle plate 81.

The floating block 42 has a steel floating structure and is connected to a guide rail 70 of a guide frame 38 by a hook 83 attached to the floating block so as to be vertically movable, as shown in FIGS. Have been.
Thereby, the floating block 42 follows the water level fluctuation and is positioned on the water surface. A fish collecting lamp 57 and a submersible pump 84 are provided on the upper surface of the floating block 42, and a branch member 85 provided on the floating block 42 is a horizontally rotatable cantilever truss frame. A water pipe 86 is supported and the sprinkling position can be changed. The fish intrusion prevention wire mesh 87 (see FIG. 19) provided on the downstream side of the floating block 42 has a guide frame 3.
It is provided in order to prevent fish entering the space between the ridge 8 and the embankment 1 from entering and to prevent dust from being trapped.

Next, the operation of the intake gate 15 will be described. i) Upper layer water intake (takes clear water and warm water from the water storage surface) Normally, the water intake gate 15 keeps the mouth 45 of the uppermost door body a at a position obtained by subtracting a specified water intake depth h from the water storage surface. The upper stiffening girder 50 is hooked on the lower stiffening girder 51 of each of the door bodies (a, b, c, d) as described above, and is arranged in a “blind shape”, and the lower end of the lowermost door body d is buried in the bottom concrete surface. The door stop 53 is in contact. Door body a as the water level fluctuates up and down
By operating the switchgear 2 through a water level gauge provided on the embankment body water storage surface side, it follows the fluctuation while maintaining the specified water intake depth h, and takes in the planned water intake from the inlet (water intake board) 45. ii) Intake of middle and lower layers In the case of middle layer intake, lower the intake 45 of the door a to the middle position of the reservoir water depth to take in the stored water at the middle position. In the case of lower layer water intake, a series of "bordered" doors (a, b, c, d) are wound up from the bottom concrete surface to a required height, and water is taken in from the bottom of the door d.

When the water intake gate 15 is constantly raised to a level higher than the full water level for maintenance and inspection, as shown in FIG. 6, the counterweight 49 is manually set in the fitting direction, and the uppermost door body a is lowered. The pin (a, b, c, d) is automatically fitted to the pin 47 provided on the upper part of the lowermost door d, and the doors (a, b, c, d) are lifted up to the maintenance level floor in a state where they are collectively springed, and maintenance inspection is performed. After the maintenance, the door (a,
When moving b, c, d), counter weight 4
When the lower end of the lowermost door body d is landed on the concrete surface at the bottom, the lifting hook 48 is disengaged from the pin 47 by the fitting and removing mechanism.
After the lifting hook 48 comes off the pin 47, the wire 4
, The lowermost door body d has landed, and the uppermost door body a rises with the intermediate door bodies b and c suspended.
It can be stopped at the required level to take a specified amount of water.

In the case of a conventional semicircular or straight multi-stage gate, a straightening plate is provided just above the uppermost gate to prevent air suction generated at the time of water intake. In the present invention, a circular passage structure is provided at the center of the mouth. This arrangement can avoid such an air suction phenomenon. In addition, by providing the rectifying plate symmetrically behind the circular passage structure, the water flow can be smoothly guided to the mouth of the water discharge pipe 18.

Next, the operation of the fish dam device for a high dam will be described. According to the present invention, a fish transport facility is provided at a high dam which is a hindrance to the movement of fish going up and down, and fish that have gone up the stairs-type fishway 10 inside the embankment are securely released to the cage 36 and released to the upstream reservoir.
Further, the descending fish is invited into the cage 36 through the floating block 42 having a means for collecting and guiding fish, and is released to the fish collecting tank 31 of the fishway in the embankment by the transporting means.
Flow down the dam downstream along the zero flow.

In the step-type fishway 10, a flow rate suitable for ascending and descending fishes and a good hydraulic flow are created by a steel energy dissipator 37.
On the other hand, at the entrance of the fishway, in order to stimulate the countercurrent of the fish and further enhance the run-up ability, flowing water having a high flow velocity in parallel with the fishway is discharged from the priming pipe 29 as priming water. The flowing water is introduced from the water intake section of the water intake gate 15, and the warm water in the upper layer of the reservoir flows into the automatic constant flow rate device 74 (see Japanese Patent Application No. 8-334729). Hot water is supplied to the water pipe 7 of the automatic constant flow rate device 74.
The required flow rate is flowed down from 7. Hot water streams are best suited for fish ecosystems and do not require separate hot water intakes to avoid cold water intake.

In the steel dissipator 37, pressure water is jetted from the orifice hole 79 of the water guide pipe 77, and the jetted water flows out of the orifice hole 79 provided in the baffle plate 81 immediately above, and further flows out of the baffle. After passing through the orifice hole 79 of the plate 81, the energy is gradually reduced and becomes a still water surface at the uppermost water surface, and the still water falls from the notch in the surrounding side wall. Then, the water flows out of the dam embankment through the stepped fishway 10.

On the reservoir side, the floating block 42
Flush-type sprinkling of fish to cage 3 against upstream fish
Although there is an effect of inducing water from the inside of the reservoir 6 to the reservoir 14 side, the position of the water sprinkling pipe 86 is changed, a flush-like watering is performed on the upstream surface of the guide frame 38 to attract fish descending, and guidance from the reservoir 14 to the cage 36 is performed. You can collect fish. At night,
The fish collecting lamp 57 is also used. Further, the jet stream jetted from the horizontal jet jet pipe 59 provided on the downstream side wall of the cage 36 has an effect of collecting fish descending into the cage 36, and the water sprinkling device 56 and the fish collecting lamp 5 provided at the upper part of the cage.
7 has the same effect.

Next, the procedure for storing and transporting upstream fish will be described. First, the ascending fish is attracted to the priming water injected from the priming pipe 29 at the entrance of the fishway, and goes up the stair-type fishway 10 in the embankment. In the staircase type fishway 10, it is assumed that swimming is promoted by the illumination light 33 on the ceiling, and the lower part of the vertical passage 35 communicating with the fish collecting tank 31 and the circular passage 34 is swimming and staying. At this time, the automatic constant flow device 74 allows hot water to flow from the water intake section of the water intake gate 15, and the flow and priming caused by the falling water from the upper part of the energy damper 37 are always created. In such a situation, the cage 36 is landed, the downstream side door 54 is pulled up, and a state is established in which the vehicle can communicate with the fish collecting tank 31. The hunting device 60 is disposed at a position downstream of the fish tank 31, and pulls up the hunting net 63.

After a lapse of a predetermined time, the driving net 63 is immersed in water, and the truck 62 is moved to the upstream position. And
The downstream side door 54 is closed, and the upstream fish is forcibly housed in the cage 36. After being housed, the cage 36 is
Is pulled up to the operation room 12, the carriage 41 is traversed and stopped at the center position of the guide frame 38. Next, the cage 36 is pulled down and stopped in line with the water level of the reservoir, and the upstream side door 54 is pulled up to allow traffic with the reservoir 14.

The fish in the cage 36 is stimulated by the water sprayed from the water pipe 86 of the floating block 42 and moves from the cage 36 to the reservoir 14 side. At this time, if the artificial water channel 68 for fishes is connected to the guide frame 38, the upstream fish can be moved further away and over the aver (dustproof device) to the upstream side. By repeating this cycle operation, the upstream fish can be moved upstream. After a certain period of time, the upstream side door 54 will be completely closed. If the falling fish is swimming at that time, the falling fish will be stored in the cage 36. After a certain period of time has elapsed, the cage 36 is moved to the lower bottom of the circular passage 34 in the reverse of the above-described procedure to prepare for accommodation of upstream fish. At this time, if the falling fish is accommodated in the cage 36, the falling fish is discharged to the fish collecting tank 31.

Next, the procedure for storing and transporting the falling fish will be described. Before explaining the transport procedure, flush water drops from the floating block 42 connected to the guide frame 38 to the water storage surface, and fish descend and swim in the water area in front of the cage 36 stopped according to the water surface of the reservoir. Shall be In addition, during the night, the fish collecting lamp 57 attached thereto is also turned on. Next, open the upstream side wall door 54 and spray water,
And, the horizontal jet injection pipe 59 of the downstream side wall door 54
A horizontal jet is spouted from. Fish collection lamp 5 at night
7 is turned on. By continuing this state for a certain period of time,
The fish can be further stimulated and attracted into the cage 36.

After a lapse of a predetermined time, the upstream side door 54 is closed and the cage 36 is wound up with the fish falling therein, moved in the operation room 12 and lowered in the circular passage 34 to land on the lower bottom surface. Then, the downstream side wall door 54 of the cage 36 is lifted, and the fish is released to the fish tank 31 having a flow. Then, the descending fish moves downstream of the embankment through the stepped fishway 10 in the embankment. By repeating this cycle operation, it is possible to move the falling fish downstream. Furthermore, the downstream side wall door 54 will be completely closed after a certain period of time,
If the upstream fish is swimming at that time, the upstream fish will be accommodated in the cage 36. The cage 36 descends the guide frame 38 by a procedure, stops at the water surface of the reservoir, and raises the upstream side wall door 54. At this time, if the upstream fish is contained, the upstream fish will be released to the reservoir.

Also, a scaffold 16a provided in a normal water intake facility
The steel slab 65 and the steel floor slab 65 can secure a sufficient area for maintenance and inspection of various gates, and at the same time, the steel slab 65 and the connecting member 66 make the circular passage 34 firm. In addition, by providing a flow straightening plate 67 having a structure in which the inside is filled with reinforced concrete or a steel plate welded with a sibel and filled with concrete, a flow straightening plate 67 is provided downstream of the circular passage 34, thereby improving the flow of the intake flow and increasing the rigidity of the circular passage 34, The strength can be secured against the load at the time of the earthquake in the water flow direction.

Further, since the stepped fishway 10 penetrating through the embankment from the lower part of the circular passage 34 to the starting point of the dam main body energy-reducing work 27 is provided, outside of the embankment, it is necessary to wrap around the dam at a gradient suitable for going up. The length of the fishway is significantly shorter than the concrete fishway to be constructed, and the construction cost of the fishway can be reduced. As described above, by constructing the fishway in the embankment by continuously assembling the inner tube-shaped lined steel pipe, the civil engineering construction cost can be reduced.

In the high dam according to the embodiment, the cage 36 is moved up and down inside the guide frame 38 so that the case where the water level fluctuation of the reservoir water level is very large, for example, even about 22 m, can be handled. That is, a large width can be taken. In addition, the conventional sector fishway (Fig. 27)
If you try to follow the water level fluctuations in (1), it is necessary to provide a fishway waterway with a height equivalent to the fluctuation width plus the margin in the embankment, and the strength of the embankment will be affected depending on the height of the waterway. . Therefore, the setting fluctuation range is naturally limited. This is the advantage of the present invention.

Further, in the present invention, an automatic constant flow rate device 74 is provided so that even if the water level of the reservoir 14 fluctuates, the set flow rate is made to flow down steadily. The fishway 10 flows down and is used as priming water. Further, since the hot water can be guided from the water intake section of the water intake gate 15 to the automatic constant flow rate device 74, the swimming power of the fish due to the cold water is prevented from being reduced.

In the case where the water intake device and the fishway device are installed together with the dam, in the embodiment, the water intake section of the water intake gate 15 and the upstream structure of the fishway are installed in one block section (usually 15 m wide, the space between the horizontal seams). Therefore, there is an advantage that the influence on the main body placing schedule is smaller than when each is installed alone. In addition, the shape of the device protruding upstream of the embankment is 1
Since there are only several places, the landscape design will be made without disturbing the surrounding landscape. Furthermore, both elements to be installed and constructed are concentrated in one section, and the elements are installed in order from inside to outside, so that the moving distance of the heavy equipment is short and the scaffolding can be diverted at short distances. Yes, installation efficiency can be reduced if work is performed with good work efficiency and attention to safety.

Normally, it is necessary to discharge running water having a water temperature suitable for the ecosystem of fish into the fishway, but in the present invention, by combining both devices, it is possible to guide the upper layer of warm water from the water intake section to the fishway. In addition, a separate hot water intake device is not required. In the present invention, the opening / closing device 2 and the hoisting / conveying device 39 of both devices are arranged in the operation room, and the intake gate 15 is provided on the upstream surface of the embankment.
The circular passage 34 and the guide frame 38 are adjacent to each other, and the water discharge facility 20 and the automatic constant flow rate device 74
At the upstream end of the fishway in the embankment, a steel damper 37 and a driving device 6 are installed.
Since 0 is installed adjacently, these can be centrally managed, and maintenance and inspection become easy.

Next, a high dam in which a water intake portion is arranged between a pair of piers 6 and a circular passage 34 and a vertical passage (guide frame 38) are arranged on both sides will be described with reference to FIGS.
A linear multi-stage gate is provided between the piers 6, and the door body (a,
b,. A circular passage 34 is formed inside the pier 6 on the left bank (upper position in the drawing) of the pier 6, and the fish collecting tank 31 and the stepped fishway 10 are connected to each other. A vertical passage 88 (guide frame 38) is provided along the side wall on the right bank (lower position in the drawing) of the pier 6. In addition, description of components that can be installed in common with the above embodiment, such as a driving device, will be omitted.

A floating block 42 is provided on the left bank of the pier 6 in common with the dams shown in FIGS. 23 and 24. The submersible pump 84 and the water pipe 86 are provided to flush and sprinkle water to attract fish descending. In addition, a lamp 57 for fish collection
Is also attached.

As shown in FIG. 23, the upstream surface of the pier 6 is provided with a water intake screen 17 at the center, and has a one-surface structure as a whole. The L-shaped concrete surface 8 is located along the upstream surface of the intake screen 17 and faces the upstream surface of the right bank.
9 to create a bypass flow in a direction perpendicular to the intake water flow at the intake port. The L-shaped concrete surface 89 is connected to the bank 1 by connecting members 89a at several places in the height direction. The bypass waterway 90 is formed by the side wall of the pier and the L-shaped concrete surface 89, a floating block 91 is provided at the waterway outlet, and the underwater mixer pump 92 is mounted on the floating block 91. By operating the submersible mixer pump 92, a water flow is generated in the bypass water passage 90.

A vertical passage 88 for elevating and lowering the cage 36 intersects the bypass water passage 90, and the cage 36 is fixed at a position of the vertical passage 88 located on the water surface of the reservoir. The cage 36 raises the upper and downstream side wall doors 54, and the cage 3
6, the flowing water passes through. A wire mesh 93 for preventing the fish from escaping is attached to the downstream side wall door 54 at a position that does not hinder the movement of the cage 36 along the vertical path.

The flow in the bypass waterway 90 is for surely catching the descending fish in the cage 36, and after a certain period of time, the descending fish gather at the front of the wire mesh 93, and the upstream and downstream streams are collected. The side door 54 is closed and fish is stored in the cage 36. Thereafter, the sheet is conveyed to the circular path 34 by the hoisting traveling device 39. In this case, since the descending fish is considered to descend along the flow, the downstream side wall door 54 is not provided with a horizontal jet flow pipe. The combination of the flow passing through the intake screen 17 and the bypass water channel 90 provided in a direction perpendicular to the flow has an effect of lowering the falling fish more reliably.

On the other hand, without constructing the L-shaped concrete surface 89, as shown in FIG. 24, the guide frame 38 is provided on the side wall of the pier 6, and the rails 94 are provided on the main pillars of the guide frame 38 and the embankment 1 to perform the flow. The chining block 95 is arranged so as to be able to move up and down, and a rectifying side steel plate 96 is attached upstream of the floating block 95 to form a substantially L-shaped bypass water passage 90. In this case, the submersible mixer pump 92 is connected to the floating block 9.
Mounted on the embankment side of No. 5 and placed underwater. From the viewpoint of the landscape, the fishway shown in FIG. 24 has a shape in which the protruding portion from the upstream surface of the embankment is small and is adapted to the upstream surface of the embankment. Further, when the guide frame 38 is separated from the pier due to construction reasons, a side steel plate is extended from the embankment body and connected to the main pillar of the guide frame 38. Further, since the length of the guide frame 38 is up to the low level of the water level fluctuation, the weight burden is small and the moving installation is not so difficult. Further, since the inlet of the bypass waterway 90 is separated from the water intake, the straightening side steel plate 96 is extended or the bypass waterway 90 is omitted.

[0054]

The present invention is constructed as described above, and is provided between a pair of piers (a standard horizontal seam interval of a bank, for example, 1
(Corresponding to about 5m), the water intake and fishway equipment will be installed, so that the original construction plan can be set in accordance with the dam completion date without affecting the embankment and other block installation schedules. In addition, since the water intake device and the fishway device are provided side by side, the installation heavy equipment can be operated with high efficiency, can be moved close to a scaffold, etc., and the workability is good and the construction cost can be reduced. Also, after the device is completed, since both are arranged at one place, centralized management such as maintenance and inspection can be performed. Furthermore, since there is only one structure protruding from the upstream surface of the embankment, it can conform to the surrounding civil engineering structure shape, resulting in a landscape design.

The foundation concrete of the intake gate and the support member for the scaffold and the circular passage are shared, and the rigidity can be increased. Can be prevented from lowering the water temperature and lowering the swimming ability of the fish. In addition, the transport cage for storing fish is aligned with the water storage surface adjacent to the intake of the intake section, and stops and waits. By acting on the falling fish, the falling fish can be easily stored in the cage.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a water intake and fishway juxtaposition type dam according to the present invention.

FIG. 2 is a top view of the dam shown in FIG.

FIG. 3 is a front view of the dam shown in FIG.

FIG. 4 is a side sectional view showing a main part of a water intake and a fishway of the dam shown in FIG. 1;

FIG. 5 is a side sectional view showing a right-side continuation portion of FIG. 4;

FIG. 6 is a main part side view showing an upper end of a door body of the intake gate;

FIG. 7 is a cross-sectional view showing an intake gate and a circular passage according to (a) and (b).

FIG. 8 is a plan view of an upper part of an intake gate.

FIG. 9 is a plan view of a fish collecting tank and a water discharge facility inside the dam.

FIG. 10 is a plan view of an operation room of a dam.

FIGS. 11A and 11B are plan views showing differences in the positions of orifice holes at the upper and lower portions of a baffle plate of a steel energy-dissipating member, as shown in FIGS.

FIG. 12 is a side sectional view of a steel energy damper.

FIG. 13 is a front view of a steel energy damper.

FIG. 14 is a side view of a cage for transporting fish.

FIG. 15 is a front view of a horizontal jet injection pipe provided on a downstream side door of a fish transport cage.

16 is a top view of the horizontal jet injection pipe shown in FIG.

FIG. 17 is a side view of the horizontal jet injection pipe shown in FIG.

FIG. 18 is a sectional view of a fishway constructed in a dam.

19 is a plan view of the guide frame shown in FIG.

FIG. 20 is a side view of a floating block provided on a guide frame.

FIG. 21 is a front view of a floating block provided on a guide frame.

FIG. 22 is a top view of a guide frame and an artificial waterway.

FIG. 23 is a cross-sectional view showing a modification of the dam in which the positions of the intake gate and the circular passage are changed.

FIG. 24 is a cross-sectional view showing a modification of the bypass channel of the dam shown in FIG. 23.

FIG. 25 is a sectional view of a conventional selective water intake device.

FIG. 26 is a top view of the apparatus of FIG. 25.

FIG. 27 is a perspective view of a conventional sector fishway.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dam embankment body 6 Pier 10 Embankment fishway (stairway fishway) 12 Operation room 14 Reservoir 15 Intake gate 29 Priming pipe 33,86 Fish collecting device 34 Closed section passageway (circular passageway) 36 Fish transport cage 37 Steel reduction Force 38 Open-section passage body (guide frame) 39 Hoisting traveling device 42 Floating block 54 Downstream side door 59 Horizontal jet water generator 74 Automatic constant flow device 77 Water pipe 89 L-shaped wall surface 90 Bypass channel 92 Underwater Mixer pump

Claims (4)

[Claims] A pier projecting from the dam bank to the reservoir is provided, and a closed cross-section passage body and an open cross-section passage body which are supported by the pier, accommodate a fish transport cage, and are capable of ascending and descending are vertically arranged in parallel. The lower end of the passage of the closed-section passage body is connected to a fish passage in the levee opening to the downstream of the dam, and the upper end is connected to an operation room provided on the pier. The upper end is fixed to the base slab, the upper end communicates with the operation room, the two paths are communicated via a hoisting traveling device provided in the operation room, and the water intake gate is provided in parallel with the pier, A water intake and fishway juxtaposition type dam, characterized in that a part of the intake water of the gate flows down to the fishway in the embankment. 2. A priming pipe for ejecting flowing water to an inlet of a fish passage in an embankment through an automatic constant flow device to an intake portion of an intake gate, and a steel energy dissipating device provided upstream of the fish passage in the embankment. The water intake and fishway juxtaposition type dam according to claim 1, wherein a water pipe communicating with the waterway is connected. 3. A floating block is connected to the left and right sides of the open passageway body in contact with the reservoir water surface so as to be able to move up and down, and the floating block is equipped with an illumination lamp, a fish collecting device such as flushing watering, and the like. The water intake and fishway juxtaposition dam according to claim 1, characterized in that the downstream side wall door of the fish transport cage is provided with a device for generating horizontal jet water. 4. A closed cross-section passage which is provided with a pair of piers protruding toward the reservoir side of the dam embankment, provided with an intake gate between the piers, and supported by one of the piers to accommodate a fish transport cage and to be able to ascend and descend. The bodies are arranged side by side in the vertical direction, the lower end of the passage of the closed cross-section passage body is connected to the fish passage in the levee that opens downstream of the dam, the upper end is connected to the operation room provided on the pier, and supported by the other pier. An open section passage body that can accommodate a fish transport cage and can be raised and lowered is vertically arranged side by side, and the lower end of the open section passage body is fixed to the concrete foundation slab under the pier, and the upper end is connected to the operation room. Then, both paths are communicated via a hoisting traveling device provided in the operation room, and an L-shaped wall is constructed immediately before the water intake gate, and L
A water intake and fishway juxtaposition dam, wherein a U-shaped bypass waterway is formed, the open-section passage body is accommodated in the bypass waterway, and a submersible mixer pump that follows the water level fluctuation is disposed at the downstream end of the bypass waterway. .