JP2008157024A - Fish way forming overflow type partition wall block and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fish way forming overflow type partition wall block, easy in its construction, when forming a fish way. <P>SOLUTION: This fish way forming overflow type partition wall block 3 is arranged on a bottom surface 6 of a waterway 2 so as to extend between both wall parts 5 of the waterway 2. In this block, while an under surface 9 is formed as a flat surface, an upper part than the under surface 9 is set so as to expand outward in the radial direction toward the other side from one side in the extending direction. Thus, this overflow type partition wall block 3 not only effectively functions as an original overflow type partition wall with a shape of its upper part but also can secure installation stability of the overflow type partition wall block 3 by using a phenomenon of expanding the area of its under surface and increasing weight, toward the other side from one side in its extending direction. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a fishway-forming overflow type partition block used for forming a fishway and a method for manufacturing the same.

  Recently, “creating a river where fish can easily climb” has been promoted as a measure, and various fish paths have been proposed in response to this movement. For example, Patent Document 1 discloses that a water channel is formed by connecting water channel forming blocks, while an overflow type partition block for fishway formation is arranged at regular intervals in the water channel.

JP 11-315528 A

  However, in the above-mentioned fishway, since the overflow type partition block is narrow and the installation stability itself is not good, the overflow type partition block is sandwiched between the water channel forming blocks so as to cross the water channel. It is supposed to be. For this reason, construction must be performed in a state where the construction of the water channel by the block for forming the water channel and the installation construction of the overflow-type partition block are carried out. In addition to the need for more attention than the water channel forming block and the overflow type bulkhead block, the work of inserting the overflow type bulkhead block between the water channel forming blocks increases as a construction burden. It will be.

The present invention has been made in view of the above circumstances, and a first technical problem thereof is to provide an overflow partition wall block for forming a fishway that can facilitate the construction when the fishway is formed. There is to do.
A second technical problem is to provide a method for producing an overflow partition wall block for forming a fishway for producing the above overflow partition wall block for forming a fishway.

In order to achieve the first technical problem, the present invention (the invention according to claim 1)
In the overflow channel partition block for forming a fishway, which is disposed on the bottom surface of the water channel so as to extend between both side walls of the water channel,
The lower surface is formed into a flat surface,
The upper part of the lower surface is set so as to expand radially outward as it extends from one side to the other in the extending direction,
A stone is built in a surface layer portion above the lower surface. Preferred embodiments of the first aspect are as described in the second and third aspects.

In order to achieve the second technical problem in the present invention (the invention according to claim 4),
A mold in which the recess opened upwards extends straight and the inside of the recess expands in the radial direction from one side to the other in the direction of extension, and a frame that can be accommodated along the recess in the mold Prepare a stone holding unit with a stone attached to the mesh,
First, arrange the frame on the bottom of the waterway,
Next, the stone holding unit is attached to the frame body at a substantial portion that should be disposed to face the concave inner surface of the mold to form a reinforcing structure,
Next, the mold is put on the reinforcing structure with the opening side facing the water channel bottom surface, the mold is placed on the water channel bottom surface, and the reinforcing structure is set in the mold,
Next, the concrete is poured into the mold from above or from the side.
It is set as the structure made into the manufacturing method of the overflow type partition block for fishway formation characterized by this.

According to the invention described in claim 1, the overflow partition wall block has an area of the lower surface that increases and a weight that increases from one side to the other side in the extending direction. By using the area and weight, simply placing the overflow partition wall block on the bottom of the water channel, the overflow channel partition block can be installed on the bottom surface of the water channel with good installation stability regardless of the construction of the water channel. Become. For this reason, by using the overflow type partition block, the installation work load can be reduced, and the construction can be facilitated when forming the fishway.
Of course, if the overflow-type partition block is used, various speeds of different swimming power can be obtained by utilizing the fact that the speed of overflow water that flows on the outer peripheral surface after installation is different in the extending direction of the overflow-type partition block. You will be able to climb fish.

  Moreover, since the stone is built in the surface layer part in the upper part, the wear resistance can be improved, and the overflow type partition block can be used also in the upstream and middle flow areas.

  According to the invention described in claim 2, a frame body is built in the surface layer portion so as to extend over the entire extending direction, a mesh body is attached to the frame body, and a stone is attached to the mesh body. Therefore, the stone can be accurately arranged in the surface layer portion in the portion above the lower surface of the overflow type partition block, and the overflow type partition block according to the first aspect can be specifically provided.

  According to the invention described in claim 3, since the plurality of constituent blocks are configured by sequentially connecting in the extending direction, the number of the constituent blocks can be adjusted to adjust the width of the water channels. Will be able to respond accurately and promptly.

  According to the invention described in claim 4, the overflow type partition block according to claim 1 can be specifically formed directly on the bottom surface of the water channel using a mold.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 and 2, reference numeral 1 denotes a fishway according to the first embodiment, and the fishway 1 has an overflow channel partition block (hereinafter referred to as a partition block) 3 according to the embodiment in a water channel 2. It is set as the structure arrange | positioned at intervals L in the direction.

  The water channel 2 is formed of a bottom wall portion 4 extending with a constant width and a pair of side wall portions 5 standing on both sides of the bottom wall portion 4 in the width direction. The bottom wall 4 is inclined so that water flows, and the gradient is set to about 1:10 to 16 in the present embodiment. The bottom wall portion 4 has a riverbed surface (water channel surface) 8 formed by placing concrete or the like on the bottom surface 6 to form a finishing layer 7. The finishing layer 7 forms the partition block 3 on the bottom surface 6. After being placed on top, it is to be applied on the bottom surface 6 (see FIG. 6, in FIGS. 3 and 5, H2 indicates the depth at which the lower part of the partition block 3 is embedded in concrete or the like) . Each side wall 5 extends in the extending direction of the water channel 2 with a certain thickness, and in this embodiment, a connecting tool for connecting the partition block 3 is provided on the inner surface of each side wall 5. Not. By utilizing the weight and area of the partition block 3 and the engagement (described later) between the partition block 3 and the finishing layer 7, the partition block 3 can be sufficiently fixed at the installation position. This is because a sufficient degree of connection with the secondary concrete 32 is sufficient.

  As shown in FIGS. 1 and 2, each partition block 3 extends so as to straddle between a pair of side wall portions 5 of the water channel 2. The overall length B (for example, around 5 m) of the partition wall block 3 is substantially the same as the width interval between the pair of side wall portions 5 of the water channel 2, but the partition wall block 3 is interposed between the pair of side wall portions 5. The total length B of the partition wall block 3 is slightly shorter than the width interval between the pair of side wall portions 5 so that it can be inserted across the wall.

  As shown in FIGS. 1 and 4 to 6, each partition block 3 is formed in a substantially half-cone shape (a shape obtained by halving a conical shape) from concrete. In other words, the partition block 3 has a lower surface 9 formed as a flat surface over the entire length B in the extending direction as a surface to be contacted (installed) with the bottom surface 6 of the water channel 2, while being higher than the lower surface 9. In the portion, a substantially semi-cylindrical portion 11 and a substantially semi-conical portion 12 are continuously provided from one side in the extending direction (left side in FIGS. 3 and 4) to the other side (right side in FIGS. 3 and 4). Is formed.

As shown in FIG. 6, the substantially semi-cylindrical portion 11 has an outer edge of the top portion 11 a over the entire extending direction of the substantially semi-cylindrical portion 11 on the virtual surface 26 that is flush with the riverbed surface 8 during installation. A circular arc having a radius R1 (for example, set to about 300 mm in consideration of a minimum radius at which fish can easily climb and a minimum water level, etc.) is formed around the point O1, and the width direction of the arc-shaped top portion 11a (FIG. 6). One side (upstream or downstream) side surface 27 is connected to one side, and the other side (upstream or downstream) side surface 28 is connected to the other side in the width direction of the arcuate upper portion 11a. Yes. The one side surface 27 is inclined toward one side outward (left side in FIG. 6) in the width direction of the partition block 3 as it goes downward, and the other side surface 28 is the width of the partition block 3 as it goes downward. In this embodiment, the side surfaces 27 and 28 are symmetrically arranged. For this reason, the width direction length D1 of the lower surface 9 of the substantially semi-cylindrical portion 11 is slightly longer than twice the length of R1, for example, D1 = about 600 to 720 mm. Such a substantially semi-cylindrical part 11 is to extend by a certain length B1 (around 300 to 400 mm) while maintaining a constant height H1 (around 400 mm). A portion having a constant thickness H2 from 9 is a portion embedded by the finishing layer 7 (concrete or the like).
In FIG. 6, θ represents an angle between the virtual plane 26 and the arc formation limit point of the substantially semi-cylindrical portion 11, and is set to about 20 to 25 ° in the present embodiment. ing. For the substantially semi-conical portion 12 as well, the angle of the arc formation limit point with the horizontal plane passing through the apex of the substantially semi-cylindrical portion 11 as the reference plane is set to the same angle θ.

  The substantially semi-conical portion 12 is set so as to gradually expand outward in the radial direction from one side to the other side in the extending direction. Specifically, the substantially semi-conical portion 12 has a top portion 12 a formed in an arc shape over the entire extending direction of the substantially semi-conical portion 12, and the arc shape is a radius of the substantially semi-cylindrical portion 11. It is formed with the same radius R1 as R1. The height of the arcuate top portion 12a increases toward the other side in the extending direction, and one side (upstream side or upstream side) of the arcuate top portion 12a in the width direction (the left-right direction in FIG. 6). The downstream side surface 29 is continuous, and the other side (upstream side or downstream side) side surface 30 is connected to the other side in the width direction of the arcuate top portion 12a. The one side surface 29 is inclined toward one side outward (left side in FIG. 6) in the width direction of the partition block 3 as it goes downward, and the one side surface 29 extends toward the other side in the extending direction. 3 is to spread slightly outwardly on one side in the width direction. Similarly, the other side surface 30 is inclined toward the other side in the width direction (right side in FIG. 6) of the partition block 3 as it goes downward, and the other side surface 30 is directed to the other side in the extending direction. Accordingly, the partition wall block 3 is somewhat expanded outwardly on the other side in the width direction.

Such a partition block 3 is more compact than the partition block 3 whose diameter is increased substantially in a circular arc outward in the radial direction toward the other side in the extending direction. That is, the outer edge of the substantially circularly expanded diameter outwardly in the radial direction toward the other side in the extending direction is suspended from the arbitrary vertex of the substantially semi-conical portion 12 to the virtual surface 26 to the virtual surface. 26, the drooping length can be obtained by drawing an imaginary circle 31 with a radius R2, but the one side surface 29 and the other side surface 30 of the partition block 3 according to the present embodiment can be obtained. Both are supposed to fit within the virtual circle 31 and are compact. In FIG. 6, the vertex at the other end surface in the extending direction of the partition block 3 is set as an arbitrary vertex, and the drooping length is radiused around the point O1 that hangs from the vertex to the virtual surface 26 and intersects the virtual surface 26. The virtual circle 31 is drawn by setting it as R2.
Thereby, it is possible to make the river flow easy to climb upstream as a continuous flow that flows along the outer peripheral surface of the substantially semi-conical portion 12 while achieving compactness.

  Such a partition block 3 is to be disposed on the bottom surface 6 of the water channel 2 at a predetermined installation position as shown in FIGS. It has become. In this case, the partition block 3 is formed such that the lower surface 9 is formed in a flat surface, and the substantially semi-cylindrical portion 11 and the substantially semi-conical portion 12 which are the upper part of the lower surface 9 have a diameter that increases from one side to the other in the extending direction. Since the partition block 3 is set so as to expand in the direction, the area of the lower surface thereof increases and the weight increases as it extends from one side to the other side in the extending direction. By simply placing the partition block 3 on the bottom surface 6, the partition block 3 can be installed (fixed) on the bottom surface 6 of the water channel 2 with good stability (area and weight).

In addition, in the present embodiment, after the partition block 3 is disposed on the bottom surface 6 of the water channel 2, concrete or the like is cast to form the finishing layer 7, and the side surface of the substantially semi-cylindrical portion 11 in the partition block 3. The lower portion 11b and the lower side surface 12b of the substantially semi-conical portion 12 are engaged with the finishing layer 7 made of concrete or the like, and the movement of the partition block 3 is regulated not only by the weight but also by the engagement relationship. It will be.

  Further, in the present embodiment, as described above, the secondary concrete 32 is filled between the both end surfaces in the extending direction of the partition block 3 and the side walls 5 of the water channel 2, but preferably as shown in FIG. A groove 23 extending in the vertical direction is formed on the end surface in the extending direction of the partition block 3, and a water stop plate 14 projecting from the side wall 5 of the water channel 2 is accommodated in the groove 23. It is preferable to fill the secondary concrete 32 so that the water stop plate 14 is buried between the direction end surface and the side wall 5 of the water channel 2. Thereby, while being able to restrict | limit that a water moves between the extending direction end surface of the partition block 3 and the side wall part 5, it can control more reliably that the partition block 3 moves to a flow direction.

Thus, when the partition block 3 is installed in the water channel 2 and arranged as shown in FIGS. 1 and 2, the water is based on the inclined surface of the partition block 3 (inclination of the top portion 12a (see FIG. 3)). Flows while meandering from the upstream side to the downstream side while overflowing (the flow of water is indicated by the symbol WS in FIG. 2). Along with this, the fish f climbs from the downstream side to the upstream side against the flow, as is apparent from the symbol fs indicating the movement of the fish (see FIG. 1). At this time, in the partition block 3, the speed of overflow water differs depending on the inclination in the extending direction, and even a fish with weak swimming ability can climb upstream. Further, in the water channel 2, a stagnation portion S that is not affected by the flow is formed by the partition block 3, and the fish f can rest in the stagnation portion S.
In addition, in installation of this partition block 3, the depth Wd from the top part 11a of the substantially semicylindrical part 11 to the water surface WL is set to about 20 cm, Therefore, between the adjacent partition blocks 3 The interval L and the like are adjusted as appropriate.

  Further, as each partition block 3 is made compact, not only can the amount of material (concrete amount) used for the partition block 3 be reduced, but also the residence space between adjacent partition blocks 3 can be increased. Thus, the flow velocity of the water flowing through the water channel 2 can be reduced.

9 to 12 show the second embodiment, FIGS. 13 to 15 show the third embodiment, and FIG. 16 shows the fourth embodiment. In each embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

The second embodiment shown in FIGS. 9 to 12 shows a structure in which natural stone 18 as a stone is incorporated in the surface layer portion above the lower surface 9 of the partition block 3 in order to improve the wear resistance. Yes. More specifically, a frame 15 in which the shape of the partition wall block 3 is made slightly smaller is built in the partition wall block 3 made of concrete, and a wire mesh 17 as a mesh body is attached to the frame 15, and the wire mesh 17 is naturally A stone 18 is attached.

In order to manufacture the partition block 3 according to the second embodiment, a mold 21 having the frame body 15 and a recess 22 that can accommodate the frame body 15 along the inside thereof, that is, the recess 22 in advance. A mold 22 in which the inside of the recess 22 extends straight outward in the extending direction from one side to the other in the extending direction, and a stone holding unit 16 in which a natural stone 18 is attached to a metal mesh 17 are prepared. To do.
First, as shown in FIG. 11, the stone holding unit 16 is attached to the frame body 15 at a portion to be disposed facing the inner surface of the recess 22 to form the reinforcing structure 19.
Next, as shown in FIG. 12, the reinforcing structure 19 is stored in the mold 21 along the inner surface of the mold 21, and then the concrete 20 is filled in the mold 21.
As a result, the entire interior of the mold 21 is filled with the concrete 20 using the mesh of the metal mesh 17, and if the mold is taken out after waiting for its hardening, the partition block according to the second embodiment is obtained.

In the third embodiment shown in FIGS. 13 to 15, the partition block 3 is configured by sequentially connecting a plurality of constituent blocks 3 a to 3 e. That is, in each of the constituent blocks 3a to 3e, a groove 24 extending in the vertical direction is formed to face each other on the end face of the adjacent constituent block, and the groove 24 between the adjacent constituent blocks 3a to 3e is a hole 25. Is forming. The holes 25 are filled with mortar, and the structural blocks 3a to 3e adjacent to each other are connected by the hardening of the mortar, and the partition block 3 is obtained. Of course, in this case, instead of filling the mortar, a metal strength member may be press-fitted as a kind of key.
In the present embodiment, the overall length B of the partition block 3 is 5 m, and the axial length LP of one constituent block 3a (3b to 3e) is set to about 1000 mm.

  The fourth embodiment shown in FIG. 16 shows a modification of the first embodiment. In this embodiment, the standing inclination of the one side surface 29 is set larger than the standing inclination of the other side surface 30. This is because the flow of water is not significantly affected by the shape (inclination) of the upstream side surface, while the shape (inclination) of the downstream side surface has a great influence on the flow of water. Is used as the upstream side surface so that the standing inclination is larger than that of the other side surface 30.

  As a result, the amount of material used for the partition block 3 can be further reduced than in the case of the first embodiment, the partition block 3 can be made compact, and the water retention space between the adjacent partition blocks 3 can be increased. (The flow rate of water can be reduced as the residence space increases).

Although the embodiment has been described above, the present invention includes the following aspects.
1) As for the stone holding unit 16 used for manufacturing the partition block 3 containing stones, pseudo stones and the like can be used as stones in addition to natural stones. A synthetic resin having a structure, a reinforcing bar, or the like can be appropriately used. Furthermore, various things, such as an adhesive agent and a connection tool (anchor, a seat board, a shackle, etc.), can be used for attachment of a stone and a net-like body.
2) The inside of the partition block 3 can be made hollow, and if necessary, a heavy object can be built in the hollow.
3) A groove extending in the vertical direction can be formed on the inner surface of the side wall 5 of the water channel 2, and the ends in the extending direction of the partition block 3 can be fitted into the groove from above to connect the both 5 and 3 together.
4) The partition block 3 can also be formed directly on the bottom surface 6 of the water channel 2 using the mold 21. That is, if the opening side of the mold 21 is directed to the bottom surface of the water channel 2 and concrete is poured into the mold 21 from above or from the side, and the concrete is hardened and then demolded, the partition block 3 is formed on the bottom surface 6. Will be. Of course, it goes without saying that it is preferable to store the reinforcing structure 19 in the mold 21 in advance from the viewpoint of wear resistance.
5) In the case where the partition block 3 is configured by connecting a plurality of constituent blocks 3a to 3e, a bottom wall portion is integrally provided below the respective constituent blocks 3a to 3e, and both ends of the partition block 3 in the extending direction. The side walls 5 are provided in the constituent blocks 3a and 3e in FIG. 3 and the plurality of constituent blocks 3a to 3e are connected to form the partition block 3 and to form part of the water channel 2 (part in the flow direction) be able to.

  It should be noted that the object of the present invention is not limited to what is explicitly described, but includes provision of what is substantially preferable or corresponding to what is listed as an advantage.

Explanatory drawing which shows the fishway which concerns on 1st Embodiment. The top view which shows the fishway which concerns on 1st Embodiment. The front view which shows the partition block which concerns on 1st Embodiment. The top view which shows the partition block which concerns on 1st Embodiment. The left view of FIG. Explanatory drawing explaining the partition block which concerns on 1st Embodiment. Explanatory drawing explaining the flow of the water in the fishway which concerns on 1st Embodiment. Explanatory drawing which shows the preferable example of a connection with the side wall part of a waterway, and a partition block. The perspective view which shows the partition block which concerns on 2nd Embodiment. XX sectional drawing of FIG. The figure explaining the manufacturing process of the partition block which concerns on 2nd Embodiment. The figure explaining the manufacturing process following FIG. The top view which shows the partition block which concerns on 3rd Embodiment. The front view which shows the partition block which concerns on 3rd Embodiment. The left view of FIG. Explanatory drawing explaining the partition block which concerns on 1st Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fishway 2 Waterway 3 Overflow type partition block 5 Side wall part of waterway 6 Bottom surface 7 Finishing layer 9 Lower surface 12 Substantially half-conical part 12b Lower side part 15 Frame body 16 Stone holding unit 17 Wire net 18 Natural stone 19 Reinforcement structure 21 Type 22 Concave Location 24 Groove 25 Hole 29 One side surface of substantially semi-conical portion 30 Other side surface of substantially half-conical portion

Claims (4)

In the overflow channel partition block for forming a fishway, which is disposed on the bottom surface of the water channel so as to extend between both side walls of the water channel,
The lower surface is formed into a flat surface,
The upper part of the lower surface is set so as to expand radially outward as it extends from one side to the other in the extending direction,
In the surface layer part in the upper part than the lower surface, stones are incorporated,
An overflow-type partition block for forming a fishway. In claim 1,
In the surface layer portion, a frame is incorporated so as to extend over the entire extending direction,
A net is attached to the frame,
The stone is attached to the mesh body;
An overflow-type partition block for forming a fishway. In claim 1 or 2,
A plurality of constituent blocks are configured by sequentially connecting in the extending direction.
An overflow-type partition block for forming a fishway. A mold in which the recess opened upwards extends straight and the inside of the recess expands in the radial direction from one side to the other in the direction of extension, and a frame that can be accommodated along the recess in the mold Prepare a stone holding unit with a stone attached to the mesh,
First, arrange the frame on the bottom of the waterway,
Next, the stone holding unit is attached to the frame body at a substantial portion that should be disposed to face the concave inner surface of the mold to form a reinforcing structure,
Next, the mold is put on the reinforcing structure with the opening side facing the water channel bottom surface, the mold is placed on the water channel bottom surface, and the reinforcing structure is set in the mold,
Next, the concrete is poured into the mold from above or from the side.
A method for producing an overflow-type partition block for forming a fishway.

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