JP4189940B2 - Fishway - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fishway provided in a river.
[0002]
[Prior art]
In the rivers where river fish such as salmon, mushrooms, etc. run up, when a structure that crosses the river, such as intake weirs or flooring works, is installed, a fishway where river fish can go up part of the structure Is required.
In general, there are a staircase type fishway and a slanted type fishway as a type of fishway that is widely adopted. These fishways have a staircase type pool by blocking the running water by providing a partition in a direction perpendicular to the running water in the flow path. It has a structure to be formed.
[0003]
For example, a stepped fishway will be described with reference to the drawings. FIG. 10 is a side sectional view, FIG. 11 is a plan view, and FIG. 12 is a front view of a partition wall. A fish passage 20 is formed by providing a notch on one side of each partition wall 18.
When constructing such a fishway, the formwork is assembled at the construction site, and concrete is poured into it to form each partition wall.
[0004]
[Problems to be solved by the invention]
According to such a conventional technique, it is necessary to assemble a formwork, place concrete, and cure it at the construction site, and the construction of the fishway requires enormous time and cost.
Moreover, there are many places where such a fishway is constructed, which is inconvenient and difficult to carry, and it is difficult to carry out such civil engineering work.
[0005]
[Means for Solving the Problems]
Therefore, the present invention provides a bulkhead body by forming a fish passage by lowering the height of the upper one side of a hollow body having a desired shape such as a substantially inverted U-shape or a rectangle in a cross-sectional shape. A fixing portion such as a flange or a tongue piece having a locking hole around both sides is formed to protrude, and the fixing portions are fixed to bolts and anchors provided on the river floor and side walls by bolts .
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a front view, FIG. 2 is a plan view, and FIG. 3 is a side view. In the figure, reference numeral 1 denotes a bulkhead body, which is a structure in which a bulkhead constituting a fishway is manufactured in advance in a factory and installed on site.
[0007]
The structure is basically the same although it differs somewhat depending on the material. The material may be a metal such as concrete or iron, a synthetic resin, or a composite material. As shown in FIG. 4, in the present embodiment, the illustrated one is a metal having a substantially inverted U-shaped cavity, and a flange or tongue having locking holes 2 on both sides in the lower longitudinal direction. A fixed part 3 such as a piece is formed so as to protrude and, if necessary, a bottom part 4 is also formed and reinforced. The cross-sectional shape is not limited to this, and may be any shape such as a trapezoid, a rectangle, or an asymmetric shape as shown in FIG. 5, and the upper end may be curved or flat. Further, the cavity width is determined by the material used, the conditions of the use location, and the like.
[0008]
Further, it is not always necessary to be a hollow body, and it may be a solid plate-like body, and its thickness and cross-sectional shape are also determined by the material used, the conditions of the use location, and the like.
On the upper side of the bulkhead body 1, a fish passage 5 is formed by lowering the height, and a fixing portion 7 such as a flange or a tongue piece having locking holes 6 is formed on the outer sides of both sides of the bulkhead body 1. It is.
[0009]
As shown in FIG. 4 , the outer peripheral surface of the partition wall body 1 is covered with a protective material 8 made of wear-resistant material such as rubber, synthetic resin, rubber asphalt, etc., so that stones, gravel, etc. that have flowed into the fishway It is possible to prevent or alleviate the collision of the bulkhead main body 1 with deformation or breakage of the bulkhead main body. In covering the protective material 8, the entire outer peripheral surface does not have to be exposed, and as shown in FIG.
[0010]
Further, as shown in FIG. 6, the protective material 8 is made of a resistance material such as natural fiber, synthetic fiber, metal fiber or a mixed fiber thereof in the wear-resistant material 13 such as rubber, synthetic resin or rubber asphalt. According to the material in which 14 is laminated and embedded, the protective effect is even greater.
In the bulkhead main body 1, a reinforcing member 9 such as a metal plate or a concrete plate may be provided as needed as shown in FIG. 1 to stabilize the shape. Further, although not shown, the same applies to the reinforcing material 9 by filling a cavity with a filler such as concrete or resin.
[0011]
The bulkhead body 1 thus formed is fixed to the anchor portion 3 formed on the bottom of the river bed 16 and the side wall 17 that is formed of cocrete, which is an installation location, or embedded in the rock. The locking holes 2 and 6 are combined and fixed with bolts 11.
Each of the locking holes 2 and 6 may be recessed about the height of the head of the bolt 11 as shown in FIG. 8 so that the bolt 11 does not protrude from the surface of each fixing portion, or the head of the bolt 11 as shown in FIG. A spacer 15 is arranged around the part so that the head of the bolt 11 is not exposed and protected from the collision of stones and gravel.
[0012]
Further, as shown in FIG. 7, the fixing portions 3 and 7 are installed so as to be fitted in the recesses formed in the river bed 16 and the side wall 17 and fixed by anchors, and further, the fixing portions 3 and 7 are protected. By covering with a mortar 12 so as to cover it, the entire surface of each fixing portion 3, 7 and the bolt 11 can be protected and protected from the collision of stones and gravel, and damage to the fixing portions 3, 7 and the bolt can be prevented. . Moreover, you may coat | cover with the mortar 12 so that only the periphery of the volt | bolt 11 may be covered depending on the case. In addition, when it coat | covers with the mortar 12, it is not necessary to coat | cover the protective material 8 on the outer peripheral surface part of the partition main body 1 of the part covered with this mortar 12. FIG.
[0013]
In addition, the above-described anchor fixing is based on the same concept in which anchor bolts are installed on the river bed and side walls, which are the installation locations, and the anchor holes 2 and 6 are fastened with nuts through the anchor bolts and fixed.
The bulkhead body described above is made of concrete. However, as described above, the material may be metal, synthetic resin, various composite materials, or the like. The shape is different. The fixing portion has an arbitrary structure such as a discontinuous state in which a plurality of independent tongue pieces forming a locking hole are arranged as described above. In any case, any structure may be used as long as the bulkhead body molded in advance in the factory can be installed and fixed on site.
[0014]
In addition, although said description demonstrated the partition of a fishway, you may use this partition main body as a river side wall, and a side wall can be formed by arrange | positioning along a river bank.
[0015]
【The invention's effect】
According to the present invention described in detail above, the fish passage is formed by lowering the height on one side of the upper part, the fixing parts are formed to protrude on both sides in the lower longitudinal direction, and the fixing parts are formed to protrude on the outer sides of both sides. By making the bulkhead main body and fixing the bulkhead body to the floor and side walls of the river on the site via its fixing part, the effect of being able to complete the fishway with very short time construction and low cost is there.
[0016]
Moreover, it has the effect that the fish path with the strength and durability as designed can be reliably constructed.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment. FIG. 2 is a plan view. FIG. 3 is a side view. FIG. 4 is a sectional view of a partition wall body. ] Cross-sectional explanatory diagram showing an example of protective material [FIG. 7] explanatory diagram of the state where the bulkhead body is installed [FIG. 8] explanatory diagram of the bolt mounting state [FIG. 9] explanatory diagram of the bolt mounting state [FIG. [Figure 11] Plan view [Fig. 12] Front view of the bulkhead [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Bulkhead body 2 Locking hole 3 Fixing part 4 Bottom part 5 Fish passage 6 Locking hole 7 Fixing part 8 Protective material 9 Reinforcing material 11 Bolt

Claims (3)

The cross-sectional shape of the hollow body of the desired shape, such as a roughly inverted U-shape or rectangle, is lowered on the upper side to form a fish passage to form a bulkhead body, which is locked around the front and rear lower ends and both sides of the bulkhead body. A fishway characterized in that a fixing portion such as a flange having a hole or a tongue piece protrudes and is fixed to an anchor provided on a river floor and a side wall with bolts . The fishway according to claim 1, wherein the outer peripheral surface of the partition wall body is covered with a protective material made of an abrasion-resistant material. The fishway according to claim 1, wherein a bottom portion is provided on the partition wall main body.

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