JP3211024B2 - Vertical fishway and its construction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical fishway provided in a dam, a sabo dam, or the like, which facilitates fish run-up, and a method of constructing the same.

[0002]

2. Description of the Related Art In rivers and the like, a dam is provided to form a reservoir, a sabo dam is provided, and a floor consolidation work is performed to prevent damage to the riverbed due to water discharge from the reservoir. In some cases, steps may occur due to embankments and floor consolidation works. Fish such as sweetfish have the habit of going upstream toward the flow, but if there is such a step, the upstream of the fish will be interrupted, the ecosystem of the fish will change, and the natural environment will be destroyed. Is done. For this reason, conventionally, a fishway having a gentle gradient from the downstream side to the step portion is formed, and a number of barriers are erected in the fishway in a zigzag manner to adjust the flow slowly, and the fish F pass through the fishway. Is able to run up.

[0003] However, since the conventional fishway has a gentle slope, the length of the fishway becomes longer, and the number of barriers increases accordingly. There is a problem that costs are high. Applicants have previously filed US Pat. No. 2,527,694 and US Pat.
The fishway which solved these problems was completed in 7704.

[0004]

However, in the fishway described above, a concrete formwork is directly attached to the dam, and concrete is poured into the formwork to complete the fishway. Production efficiency is not so good because it is a work. Therefore, there is a problem that the construction period becomes long. In particular, in recent years, the demand for fishways has increased, and it has been desired to be able to carry out work efficiently and shorten the construction period.

[0005] The present invention has been made in view of the above circumstances, and an object thereof is to complete a fishway by transporting parts manufactured in a well-equipped factory to the site and attaching the parts to a dam. Accordingly, it is an object of the present invention to provide a vertical fishway capable of shortening the construction period and a method for constructing the same.

[0006]

According to the first aspect of the present invention, the inflow
Side and outflow side, with a specified spacing on the side of the dam
A first water storage chamber attached in a plurality of stages,
It is configured symmetrically in two rows on the left and right at a predetermined distance from the water storage chamber.
And are attached to the side of the dam at multiple
And a second reservoir chamber, and electrical water passage bottom introducing water stored in the dam is secured to the inflow side attachment portion of the water storage chamber, vertically it has a mounting portion, the mounting portion of the upper end upper A place provided with a run-up gutter fixed to the outflow side mounting portion of the water storage chamber, the lower end mounting portion being fixed to the inflow side mounting portion of the lower water storage chamber, and allowing water passing through the water storage chamber to flow down to the lower water storage chamber. It has features.

According to a second aspect of the present invention, the water storage chamber has an inflow portion and an outflow portion.
It is characterized in that it is composed of a part and a turning part connecting these parts .

According to a third aspect of the present invention, the first and second water storage chambers are provided.
Is characterized in that it is formed in a semicircular shape .

According to a fourth aspect of the present invention, the inner surface of the turning portion has a water control.
It has a feature in that the protrusion is provided .

According to a fifth aspect of the present invention, the first and second water storage chambers are provided.
The mounting portion is provided outside the concave and semicircular peripheral wall and
The placement part on which the run-up gutter is placed and the semicircular peripheral wall
It is composed of a fitting part provided at the center ,
The part is provided with a fitted part fitted to the fitting part of the water storage chamber.
And the outer surface is formed in an arc shape concentric with the fitted portion.
This is characterized in that it corresponds to the peripheral wall of the water storage chamber .

According to a sixth aspect of the present invention, there is provided a headrace which is provided with a plurality of water storage chambers having mounting portions on an inflow side and an outflow side on a side surface of a bank at predetermined intervals to introduce water from the bank. Is fixed to the inflow side mounting part of the water storage chamber, the upper end of the run-up gutter is fixed to the outflow side mounting part of the upper water storage chamber, and the lower end is fixed to the inflow side mounting part of the lower water storage chamber. This is a vertical fishway construction method.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a vertical fishway according to claims 1 to 5 of the present invention and a method for constructing the same according to claim 6 will be described below with reference to FIGS. First, in FIGS. 1 and 2, a water discharge channel 11 is formed in a bank 10, and a water guide groove 11 a is formed therein. Water storage room 21
Are mounted in a plurality of stages in two rows on the left and right sides at predetermined intervals at positions separated laterally from the water discharge channel 11.

The first water storage chambers 21A are arranged in a plurality of stages in the right-hand row, have a U-shape with an open upper surface, and have an inflow portion 22 and an outflow portion 23 arranged in parallel with each other.
And a turning portion 24 connecting the ends of the inflow portion 22 and the outflow portion 23 in a semicircular shape. A plurality of water control projections for reducing the flow velocity are provided on the inner surface of the turning portion 24. 24a
Are protruding. Of the inflow portion 22 and the outflow portion 23, the wall surface on the bank 10 side is inclined according to the gradient of the bank 10.

The second water storage chamber 21B is provided with the first water storage chamber 21B.
It is arranged in a plurality of stages at a predetermined interval on the left side of A, is configured symmetrically with respect to the first water storage chamber 21A, and is mounted at a slightly lower position. This also includes an inflow portion 22, an outflow portion 23, and a turning portion 24, and a mounting portion 25 and a mounting portion 26 are provided at respective outer ends.

As shown in FIG. 3, the first water storage chamber 21A and the second water storage chamber 21B can be directly fixed by penetrating the wall surface with anchor bolts 27 embedded in the side wall of the bank 10, as shown in FIG. As shown in the figure, a support 28 is fixed to the side surface of the bank 10 with anchor bolts 27, and this support 2
8 or, as shown in FIG.
It is mounted on a support table 28 fixed to the side surface of the “0”, and is attached by a method such as lifting the upper surface with a support beam 29.

At the outer end of the inflow section 22, a mounting section 25 is provided. This mounting portion 25 is shown in FIGS.
As shown in the figure, a mounting portion 25a protruding horizontally outward,
A vertical inflow wall 25b connected to the end of the inflow section 22 and a side wall 25c protruding from the inflow section 22 so as to surround both ends of the mounting section 25a. The outer surface of the inflow wall 25b is formed in a semicircular and concave shape, and a fitting projection 25d as a fitting portion protrudes from the mounting portion 25a near the center of the arc radius.

At the outer end of the outflow portion 23, a mounting portion 26 similar to the mounting portion 25 of the inflow portion 22 is provided. The mounting portion 26 also includes a mounting portion 26a, a vertical overflow wall 26b connected to the outflow portion 23, a side wall 26c surrounding both ends of the mounting portion 26a, and a fitting protrusion 26d. In addition, the outflow part 23
The height of the overflow wall 26b regulates the water level of the overflow, and is set lower than the height of the inflow wall 23b of the inflow portion 23. The bottom of the water storage chamber 21A may be formed as an inclined surface.

When attaching the first water storage chamber 21A and the second water storage chamber 21B, the distance between the fitting projection 25a and the fitting projection 26a of both of them should be kept uniform in correspondence with the run-up gutter 41. preferable.

The water conduit 31 has a gutter shape with an open upper surface, and has a plurality of partition walls 32 protruding at an intermediate portion.
The lower end of the mounting portion 33 has an arcuate outer surface, and a lower surface is formed with a fitting hole 33a as a fitted portion.
The water conduit 31 has an upper end connected to the water discharge channel 11 of the dam 10, and a lower end mounting portion 33 is mounted to the uppermost water storage chamber 21, for example, the first water storage chamber 21A.

That is, as shown in FIGS. 6 and 7, the fitting portion 33 is attached to the mounting portion 25a while the fitting hole 33a is fitted to the fitting projection 25d of the mounting portion 25 of the first water storage chamber 21A. Put on. The mortar 3 is placed between the inflow wall 25b and the side wall 25c so as to surround the upper surface of the mounting portion 25a and the mounting portion 33.
Pack 4 Further, the side surface may be fixed to the bank 10 and the upper end may be connected to the water guide groove 11 a of the water discharge channel 11.

The run-up gutter 41 has a gutter shape with an open upper surface, and connects the mounting portion 42 at the upper end and the mounting portion 43 at the lower end in an inclined manner. The mounting portions 42 and 43 have the same configuration as the mounting portion 33 of the water conduit 31, the outer end surface of which is arc-shaped and convex, and the arc portion is the water storage chamber 21A,
21B corresponds to the concave mounting portion 25 and the mounting portion 26. In addition, the radius of the arc part of the mounting parts 33, 42 and 43 is
It is preferable that the radius is slightly smaller than the concave radii of the mounting portions 25 and 26. Fitting holes 42a and 43a are formed near the center of the arc portion as fitting portions. A plurality of partition walls 44 are provided upright on the run-up gutter 41 as necessary.

As shown in FIGS. 6 and 7, the run-up gutter 41 fits the fitting hole 42a of the mounting portion 42 at the upper end with the fitting projection 26d of the outflow portion 23 of the upper water storage chamber 21. The fitting hole 43a of the lower mounting portion 43 is fitted to the fitting projection 25d of the inflow portion 22 of the lower water storage chamber 21. And headrace 3
As in the case of the fixing of No. 1, the mortar 34 filled between the mounting portions is fixed. When this operation is repeated, the vertical waterway is completed by being connected from the uppermost water storage chamber 21 to the lowermost water storage chamber 21 by the run-up gutter 41.

In the above description, the upflow gutter 41 is simply attached to the upper water storage chamber 21 and the lower water storage chamber 21. However, at the top, the right row of water storage chambers 21A is connected to the upper water storage chamber 21A. Water storage room 21B in the left row
Corresponds to the lower water storage chamber 21, but for the next run-up gutter 41, the left water storage chamber 21 </ b> B corresponds to the upper water storage chamber 21, and the right water storage chamber 21 </ b> A corresponds to the lower water storage chamber 21. The left and right water storage chambers 21A and 21B are alternately switched to the upper and lower tiers.

Incidentally, the slope of the bank 10 may change depending on the height. That is, in the above-described first embodiment, when the gradient changes, for example, as shown in FIG. 8, the positions before and after one of the water storage chambers 21B, 21B ', and 21B''relatively change. In the embodiment, since the run-up gutters 41, 41 ′, 41 ″ automatically adjust the mounting angle with the water storage chambers 21B, 21B ′, 21B ″ around the fitting portion, the interval between the joining portions is reduced. It is kept even and does not hinder its installation. At this time, the fitting holes 42a, 43a of the run-up gutter 41 are fitted to the fitting projections 26d, 25 of the water storage chamber 21.
Since it is fitted to d, the run-up gutter 41 does not come off from the water storage chamber 21. In addition, the attaching parts 42 and 43 of the run-up gutter 41
Are formed in an arc shape, so that the water storage chambers 21B, 21B
The distance between B ′ and 21B ″ is kept substantially equal.

In the above-mentioned first embodiment, the fitting protrusion is provided in the water storage chamber, and the fitting hole is provided in the headrace and the run-up gutter. However, the present invention is not limited to this. The fitting projection may be provided on the water conduit and the run-up gutter.

Next, the process in which a fish goes upstream will be described. The water that has flowed into the water channel 31 from the water channel 11 a of the water discharge channel 11 is stored in the water channel 31 between the partition walls 32. Then, the water overflowing from the partition wall 32 passes through the inflow wall 25b, enters the inflow section 22 of the water storage chamber 21, and is stored therein.
4, the flow velocity is reduced by the water control projection 24 a, and the water flows out of the outflow portion 23 to the run-up gutter 41. Water is also stored between the partition walls 44 in the run-up gutter 41, and overflowing water flows into the lower water storage chamber 21 sequentially. Then, this process is repeated in each of the water storage chambers 21 and finally flows out to the downstream side of the river.

When the fish arrives at the lower end of the fishway, the fish goes back up the inside of the run-up gutter 41 against the water overflowing from the run-up gutter 41. Since water is stored in the partition wall 44, it is possible to temporarily take a break. In addition, some of the fish continue to run back to the water overflowing the partition wall 44 and into the upper water storage chamber 21. Water storage room 21
Inside, a water flow is formed from the inflow portion 22 to the outflow portion 23. The fish travels in the opposite direction and travels into the upstream run-up gutter 41. By repeating this, finally, it is possible to go upstream from the headrace channel 31 through the water discharge channel 11 to the upstream side.

According to the first embodiment, the following effects can be obtained. 1. Since the water storage chamber 21, the water channel 31, and the run-up gutter 41 can be produced in a factory equipped with production facilities, productivity can be significantly improved, costs can be reduced, and the construction period can be shortened. 2. Since work on site only requires attaching existing parts to the bank 10, the work efficiency is good and the construction period can be shortened. 3. Since water is stored between the partition walls also in the water storage chamber 21, the water channel 31, and the run-up gutter 41, it is possible to rest the fish going up, and the run-up is ensured even when the amount of water is small. Can be done.

4. Since the water storage chamber 21 is installed at a position distant from the water discharge channel 11 to the side, even if a large amount of earth and sand flows down the water discharge channel 11 during a flood, the water storage chamber 21 is not damaged. 5. By appropriately selecting the mounting position and the number of stages of the water storage chamber 21, the fish can easily and surely run up even in the high bank 10. 6. Since the water control projection 24a is provided in the water storage chamber 21, no vortex or turbulence occurs even when the amount of water is large. Therefore,
The fish does not erroneously move in the upstream direction due to bubbles or the like, and the upstream of the fish F is easily and reliably performed. 7. A fitting portion is provided in each mounting portion, and the end face of the run-up gutter 41 is formed in an arc shape, so that the mounting angle can be automatically adjusted even when the gradient of the bank 10 changes, and the mounting to the water storage chamber 21 can be performed. Can be significantly simplified.

FIG. 9 shows a second embodiment applied to a case where a water discharge hole 11b is provided in the middle of the bank 10. This is one in which the headrace 31 connected to the water discharge hole 11b is connected to the middle water storage chamber 21. This water outlet 1
1b is provided with a stop valve (not shown) on the upstream side, so that when the water level becomes high, the water discharge hole 11b is closed. And when the water level is low,
The water flowing out of the water discharge hole 11b flows into the middle water storage chamber 21 from the headrace channel 31. The fish goes upstream from the middle water storage chamber 21 through the water discharge hole 11b.

FIG. 10 shows the mounting portions 42, 43 of the run-up gutter 41.
This is a third embodiment in which is changed. In the third embodiment, the fitting holes 42a and 43a
43 is penetrated to the upper end. In the third embodiment, the fitting projections 25d and 26d are
a and 43a, the fitting operation can be easily performed.

FIG. 11 shows the mounting portions 25 and 26 of the water storage chamber 21.
4th using the bolt 45 attached to the
This is an embodiment of the invention. In this embodiment, after the fitting holes 42 a and 43 a are fitted to the bolt 45, the run-up gutter 41 is fixed via the nut 46.

FIG. 12 shows the mounting portions 42, 43 of the run-up gutter 41.
This is a fifth embodiment in which is changed. In the fifth embodiment, the mounting portion 43 is placed on the upper surface of the inflow wall 25b. The fitting projection 46 protruding from the mounting portion 43 is fitted into the fitting hole 47 of the inflow wall 25b. The same effects as those of the first embodiment can be obtained in the second to fourth embodiments.

FIGS. 13 and 14 show a sixth embodiment of the present invention in which the structure of the water discharge channel 11 is changed. In the sixth embodiment, the bottom face 11c of the water discharge channel 11 is
The side is set high and the other side is set low. An obstruction fence 51 is attached diagonally to the bottom surface 11c.
A prevention fence 52 is also attached to the opening on the upper surface of 1a. The prevention fence 52 may be a lid member that closes the opening. In the sixth embodiment, the falling pebbles and the earth and sand flow down in the direction of the arrow due to the inclination of the bottom surface 11c or the action of the preventing fences 51 and 52. Does not flow into the water guide groove 11a and the water guide channel 31 and is not buried.

FIGS. 15 and 16 show a seventh embodiment. The difference from the first embodiment is that the headrace 31 penetrates the bank 10 and communicates with the upstream side. A lighting part 53 having a large opening area is formed on a side surface of the bank 10. According to the seventh embodiment, the headrace 31
Since the opening area on the upstream side is small, there is an effect that the influence of the inflow of the earth and sand is small. Also, the part of the headrace channel 31 passing through the bank 10 tends to be dark,
The light from the fish does not reduce the activity of the fish. The daylighting unit 53 may be formed by a hole penetrating the bank 10 as shown in FIG.

FIG. 17 shows an eighth embodiment applied to a sabo dam. In the eighth embodiment, the drain hole 1 penetrating the dam 60 from the water storage chamber 21 at the middle level is used.
Culverts 61, 62 communicating with 1d, 11e, 11f
63 are provided. The sabo dam 60 is provided to dam the earth and sand flowing out from the upstream, and does not store water unlike a general dam. Initially,
The bottom of the river is low because no sediment is deposited. And when sediment is deposited over a long period of time, the river bottom rises gradually. In the seventh embodiment, the fish can also run up in the sabo dam 60.

That is, when the riverbed is low, the water level is at the height of H1. Then, the water flows into the water storage chamber 21 located at the middle stage through the culvert 61. Then, it flows downstream through the above-described process. The fish that has gone upstream goes from the water storage chamber 21 to the upstream side of the sabo dam 60 through the culvert 61. When the sediment on the riverbed is deposited and the culvert 61 is buried, the water level becomes H2
To rise. Then, the water flows into the water storage chamber 21 located at the middle stage through the culvert 62.

Further, when the culvert 62 is filled, the water level rises to H3, and the water flows through the culvert 63 into the water storage chamber 21 located at the middle stage. When the culvert 63 is filled, the water level rises to H4, and the water flows through the headrace 31 and flows into the uppermost water storage chamber 21. Culvert 61
The shape of 62 and 63 is not limited to a cylindrical shape, and may be a square tubular shape or the like.

In the seventh embodiment, even in this sabo dam 60, the effect is achieved that the fish can always go up regardless of the height of the sediment deposited.

FIG. 18 shows a ninth embodiment. This construction method is different from the first embodiment according to claim 6 in that it is a construction method for providing a fishway in the existing dam 10, and concrete is cast on the front of the existing dam 10 to form the foundation base 64. And the water storage chamber 21, the water conduit 31, and the run-up gutter 41 are attached to the base 64. Installation of the water storage chamber 21
The first embodiment may be the same as the first embodiment, or a buried portion (not shown) may be provided integrally with the water storage chamber 21 and buried in the base 64.

According to this construction method, since the foundation 64 is provided separately from the existing dam 10, there is no need to process the existing dam 10 and the effect is obtained that the work can be easily carried out.

[0042]

According to the first aspect of the present invention, an inflow side and an outflow side are provided.
It has a mounting part and has a predetermined interval on the side of the bank
A first water storage chamber attached to the first water storage chamber, and
It is configured symmetrically in two rows on the left and right at intervals, and the side of the dam
Second water storage chambers attached to a plurality of stages at predetermined intervals
And a headrace channel for introducing water stored in the dam and having a lower end fixed to the inflow-side mounting portion of the water storage chamber, and upper and lower mounting portions, and an upper-end mounting portion having an outflow-side mounting portion of the upper water storage chamber. Fixed to
The lower end mounting part is fixed to the inflow side mounting part of the lower water storage chamber.
Since a run-up trough which Ru is flowing down passing through the water storage chamber water in the lower part of the reservoir chamber, the reservoir chamber, headrace, each part of the run-up trough,
Since production can be carried out in a factory equipped with production facilities, productivity can be significantly improved, costs can be reduced, and the construction period can be shortened. In addition, since the work in the field only needs to attach the existing parts to the dam, the work efficiency is excellent, and the construction period can be shortened.

The invention according to claims 2 , 3 and 4 provides the first and second inventions .
The water storage chamber has an inflow section, an outflow section, and a turning section connecting these
The turning part is formed in a semicircular shape, and the inside of the turning part is
Is provided with a water control projection, so that the water flow is slowed down and fish
Run-up is easy.

According to a fifth aspect of the present invention, the first and second water storage chambers are provided.
The mounting portion is provided outside the concave and semicircular peripheral wall and
The placement part on which the run-up gutter is placed and the semicircular peripheral wall
It is composed of a fitting part provided at the center,
The part is provided with a fitted part fitted to the fitting part of the water storage chamber.
And the outer surface is formed in an arc shape concentric with the fitted portion.
Therefore, even if the position of the water storage chamber changes, the mounting position can be automatically adjusted, and the operation can be remarkably simplified.

According to a sixth aspect of the present invention, there is provided a water headrace having a plurality of water storage chambers having mounting portions on an inflow side and an outflow side on a side surface of a bank at predetermined intervals to introduce water from the bank. The lower end is fixed to the inflow side mounting part of the water storage chamber, the upper end of the run-up gutter is fixed to the outflow side mounting part of the upper water storage chamber, and the lower end is fixed to the inflow side mounting part of the lower water storage chamber. Since production can be performed at a well-equipped factory, productivity can be significantly improved, costs can be reduced, and the construction period can be shortened. In addition, since the work in the field only needs to attach the existing parts to the dam, the work efficiency is excellent, and the construction period can be shortened.

[Brief description of the drawings]

FIG. 1 is a perspective view of a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of the first embodiment.

FIG. 3 is a longitudinal sectional view showing a state where a water storage chamber is attached to a bank.

FIG. 4 is a longitudinal sectional view showing a state where a water storage chamber is attached by different means.

FIG. 5 is a longitudinal sectional view showing a state where a water storage chamber is attached by other means.

FIG. 6 is a plan view showing a connection state of a water storage chamber and a run-up gutter in the attachment portion.

FIG. 7 is a longitudinal sectional view taken along line VII-VII in FIG.

FIG. 8 is a plan view showing a mounting state when the inclination of the bank changes.

FIG. 9 is a perspective view of a second embodiment.

FIG. 10 is a longitudinal sectional view showing a mounting state of the third embodiment.

FIG. 11 is a longitudinal sectional view showing an attached state of a fourth embodiment.

FIG. 12 is a longitudinal sectional view showing a mounting state of the fifth embodiment.

FIG. 13 is a plan view of a sixth embodiment.

FIG. 14 is a sectional view of a water discharge channel according to a sixth embodiment.

FIG. 15 is a perspective view of a seventh embodiment.

FIG. 16 is a cross-sectional view illustrating a lighting unit according to a seventh embodiment.

FIG. 17 is a perspective view of the eighth embodiment.

FIG. 18 is a perspective view of a ninth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Weir 11 Drainage channel 11a Water channel 21 Water storage room 21A First water storage room (right column) 21B Second water storage room (left column) 22 Inflow portion 23 Outflow portion 24 Turning portion 25 Mounting portion 25a placement portion 25b Inflow wall 25d fitting projection (fitting part) 26 mounting part 26a mounting part 26b flood wall 26d fitting projection (fitting part) 31 water conduit 33 mounting part 33a fitting hole (fitted part) 41 run-up gutter 42 mounting Part 42a Fitting hole (fitted part) 43 Mounting part 43a Fitting hole (fitted part) 45 Bolt (fitting projection) 46 Fitting projection 47 Fitting hole 53 Daylighting part 60 Sabo dam 61 Drainage culvert 62 Water discharge Culvert 63 Drainage culvert 64 Foundation

Claims (6)

(57) [Claims] 1. A dam having a mounting portion on an inflow side and an outflow side.
The first storages attached in a plurality of stages at predetermined intervals on the side surface
The water chamber and the first water storage chamber are symmetrical in two rows on the left and right at a predetermined interval.
And a plurality of steps at predetermined intervals on the side of the dam
And a second reservoir chamber which is attached, and conductive water passage bottom introducing water stored in the dam is secured to the inflow side attachment portion of the water storage chamber, the attachment portion up and down, mounting of the upper end Part is fixed to the outflow side mounting part of the first or second water storage chamber, and the lower end mounting part is fixed to the inflow side mounting part of the lower second or first water storage chamber, and the water passing through the water storage chamber is lower. A vertical fishway provided with a run-up gutter for flowing down into a water storage room. 2. The first water storage chamber and the second water storage chamber have an inflow port.
Part, outflow part and turning part connecting these parts
The vertical fishway according to claim 1, wherein 3. The turning part of the first and second water storage chambers is semicircular.
3. The method as claimed in claim 1, wherein the second member is formed at a center.
Vertical fishway. 4. A water control projection is provided on the inner surface of the turning portion.
The vertical type according to claim 1, 2, or 3,
Fishway. 5. The mounting portion of the first and second water storage chambers has a concave shape.
In addition, the run-up gutter provided outside the semicircular peripheral wall is placed.
Mounting portion and the semi-circular peripheral wall provided substantially at the center.
And a fitting part of the run-up gutter is fitted to the fitting part of the water storage chamber.
A mating portion is provided and the outer surface is a circle concentric with the fitted portion.
It is characterized in that it is formed in an arc shape so as to correspond to the peripheral wall of the water storage chamber.
The vertical fishway according to claim 1, 2, 3, or 4, which is a feature . 6. A plurality of water storage chambers having attachment portions on an inflow side and an outflow side on a side surface of the dam are provided in a plurality of stages at predetermined intervals, and a lower end of a headrace for introducing water of the dam is attached to an inflow side of the water storage chamber. A vertical fishway construction method characterized in that the upper end of the run-up gutter is fixed to the outflow-side mounting part of the upper water storage chamber and the lower end is fixed to the inflow-side mounting part of the lower water storage chamber.