JPH0881945A - Denier type fabricated fishway - Google Patents

Abstract

PURPOSE: To improve efficiency in execution of work by a method wherein a U-shaped body is formed of a baffle plate and side walls extending in bending from both sides of the baffle plate, and another U-shaped body is attached at its free ends on the side walls to the baffle plate of the U-shaped body and fixed with bolts and nuts. CONSTITUTION: A plurality of U-shaped bodies 1 are arranged with their baffle plates 2 tilted toward the downstream side. Then, bent parts 4 of one U-shaped body 1 are butted against both of vertical sides on the baffle plate 2 of another U-shaped body 1 and connected with bolts and nuts 7 through bolt holes 6. Then, a waterway structural body 10 is placed on a concrete foundation in a ditch for a fishway constructing part. Then, concrete is placed, or covering with soil is made, to both sides of the structural body 10. In the case where a curved fishway is constructed, spacers are interposed to each of one sides on the connecting parts, and the U-shaped bodies 1 are connected with one another in biased positions. Thereby, transportation and fabrication become easy without the need for welding works while being easily constructible in curved structure, and component parts can be standardized, being available for supply at low cost.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a denier type assembled fishway in which baffles are arranged at appropriate intervals.

[0002]

2. Description of the Related Art A denier type fishway is introduced in "Design of a fishway (Hokkaido)", page 314 and subsequent pages edited by the dam water source environment maintenance center. According to this document, in the denier type fishway, as shown in FIG. 8, a large number of baffle plates 22 are arranged at appropriate intervals in a U-shaped waterway 20, and there are plugs at various places in the waterway. Switchback 2
3 is provided and the water channel is formed by being bent in plural. The baffle plate 22 has a substantially U-shape in which a flow port 24 that is opened upward is formed in the center of the baffle plate 22. Further, the baffle plate 2 is not limited to a substantially U-shaped one, but may be a substantially b-shaped one having a hole formed in the center. All baffles 2 should be installed in the waterway inclined in the direction of water flow,
Alternatively, they can be mounted in an orthogonal state. Baffle 2 is 25
Since they are attached at intervals of about 0 to 300 mm, steel plates are often used mainly due to conditions such as structural strength, durability, and construction. As a method of fixing the baffle plate 22 in the waterway,
As shown in FIG. 9, a large number of vertical grooves 20B are provided at appropriate intervals on opposing side walls 20A in the water channel 20, and fixed by inserting a baffle plate 22 into each vertical groove 20B, or as shown in FIG. As shown, the baffle plate 22 and the side wall of the water channel 20 are fixed by welding.

[0003]

In the conventional denier type fishway, it is necessary to manufacture the waterway structure in which the side wall and the baffle plate are integrated by dividing the waterway structure into a size and a weight that can be transported in a factory. was there. Even when the baffle plate is inserted, since welding is required as in the case where the baffle plate is directly welded to the side wall, both can be divided to the same extent. If the waterway of the fishway is to be bent or curved due to other structures, the baffle plate should be 20.
Since they are arranged at an interval of 0 to 300 mm, the production of the bent portion of the water channel structure is extremely complicated work.

According to the present invention, the size and weight for carrying from the factory to the site can be arbitrarily set, and a denier type structure having a structure that does not require welding requiring specialized technology. The purpose of the present invention is to provide an assembled fishway, and furthermore, a denier that can easily manufacture and construct a bent portion of a waterway.
It provides a le-assembled fish path.

[0005]

In order to achieve the above object, the present invention forms a U-shaped body by a baffle plate and side walls bent and extended from both sides of the baffle plate. A plurality of U-shaped bodies are continuously connected by fixing a free end edge of the side wall portion of the U-shaped body to the baffle plate of another U-shaped body or the vicinity thereof by bolts and nuts. It is configured to do.

The invention according to claim 2 is characterized in that the free end edge of the side wall portion of the U-shaped body is bent inward, and the bent portion is connected to the baffle plate. It is configured.

In the invention according to claim 3, when the free end edge of the side wall portion of the U-shaped body is bent inward and the bent portions are connected to both sides of the baffle plate, respectively, A spacer is inserted on one side to form a bent fish path.

[0008]

According to the invention described in claim 1, the U-shaped body is carried to the site as it is, or it is carried to the site while being connected by a plurality of bolts and nuts, and the U-shaped body is further connected at the site. , Can be completed as a water channel structure in which baffles are arranged at equal intervals. Then, the waterway structure is embedded in the groove formed from the upstream side to the downstream side through the side part of the dam constructed in the river to form the fishway.

In addition to the above-mentioned effects, the invention according to claims 2 and 3 is such that every time the U-shaped bodies are connected to each other or a spacer is provided on one side of the U-shaped bodies in an appropriate range. By inserting the −, it is possible to bend the whole or part of the water channel structure. If you adjust the width of the spacer to be inserted properly,
A desired degree of curvature is also selected.

[0010]

An embodiment of the present invention will be described below with reference to FIGS. First, the U-shaped body 1 is formed by the baffle plate 2 and the side wall portions 3 bent and extended from both side portions 2A of the baffle plate 2. In this embodiment, the free edge 3 of the side wall 3 of the U-shaped body 1
B is bent inward to form a bent portion 4.

As a method of manufacturing the U-shaped body 1, a steel plate is punched into a shape as shown in FIG. 2, a flow path 5 having an effective width is bored in a central rectangular portion thereof, and the punched plate is then cut. The baffle plate 2, the side wall part 3, and the bent part 4 are integrally formed by bending inward 90 degrees at four places X in the longitudinal direction, and the baffle plate is formed on the bottom side. 2 becomes the inclined U-shaped body 1. Bolt holes 6 are formed in the longitudinal direction on both sides of the baffle plate 2 and on the bent portion 4.

The plurality of U-shaped bodies 1 thus configured are aligned so that the baffle plate 2 is inclined toward the downstream side. The bent portions 4 of the other U-shaped body 1 are abutted against both longitudinal sides of the plate 2 and are connected by bolts and nuts 7 using bolt holes 6 provided therein (FIG. 3). The waterway structure 10 constructed in this manner is placed on a flat concrete foundation struck at the bottom of a trench dug in the vicinity of a dam where construction of a denier fishway is desired. After that, concrete is struck from both sides of the waterway structure 10 and the soil is covered to complete the fishway.

Further, as shown in FIG. 4, the U-shaped bodies 1 are connected to each other by leaving the free end of the side wall 3 in a flat plate state without forming the bent portion 4 at the free end of the side wall 3. The bolt holes 6 may be formed along the base edge and the free edge of the side wall 3. In this case, the free end of the side wall 3 of the U-shaped body 1 is slightly widened and overlapped with the base edge of the side wall 3 of the other U-shaped body 1, the respective bolt holes 6 are aligned, and this portion is bolted. Fastened with nuts to form the water channel structure 10.

FIG. 5 shows an example in which the denier fishway of the present invention is provided in a river in which the rubber weir 12 is installed.
FIG. 5A is a sectional view taken along the line AA of FIG.

As shown in FIG. 5, the fishway has a bent or curved portion, and in this portion, as shown in FIG. 7, the bent portions 4 of the pair of side wall portions 3 of the U-shaped body 1. When each of the other baffle plates 2 is connected to both sides of the baffle plate 2, if a spacer 11 is inserted on one side, the other c-shaped body 1 is horizontally aligned with respect to one U-shaped body 1. Can be connected in a distorted state. The channel structure can be bent or bent as desired by appropriately changing the thickness or the insertion position of the spacer 11. The spacer 11 is preferably made of steel, rubber or synthetic resin and has a wedge shape.

[0016]

[Effect] Since the present invention is constructed as described above, it is only necessary to carry the U-shaped body and the bolts and nuts, and even if a part is assembled, it is not bulky and easy to carry. The U-shaped body has a simple structure, and since it is only necessary to manufacture one type, it can be supplied at a low cost, the stock can be easily stored, and the product can be standardized. Since it can be assembled with a U-shaped body and bolts and nuts, welding, which requires a high degree of skill, can be dispensed with, and speeding up of the work can be expected. A curved or bent denier type fishway can be easily constructed simply by using a spacer.

[Brief description of drawings]

FIG. 1 is a perspective view of a U-shaped body that constitutes the present invention.

FIG. 2 is a plan view of a punching plate for explaining a manufacturing procedure of the U-shaped body shown in FIG.

FIG. 3 is a plan view of a water channel structure constituted by connecting U-shaped bodies of the present invention.

FIG. 4 is a view similar to FIG. 1, showing another embodiment of the U-shaped body according to the present invention.

FIG. 5 is a plan view of a river provided with a denier type fishway.

FIG. 6 is a sectional view taken along the line AA of FIG.

FIG. 7 is an explanatory view of means for bending or bending the fishway in constructing the denier type fishway of the present invention.

FIG. 8 is a perspective view for explaining a conventional denier type fishway.

FIG. 9 is a view showing a state in which a baffle plate is attached to a side wall by a groove in a conventional denier type fishway.

FIG. 10 is a view showing a state where a baffle plate is attached to a side wall by welding in a conventional denier type fishway.

[Explanation of symbols]

 1 U-shaped body 2 Baffle plate 3 Side wall 4 Bent part 5 Flow path 6 Bolt hole 7 Bolt nut 10 Water channel structure 11 Spacer

Claims (3)

[Claims] 1. A U-shaped body is formed by a baffle plate and side wall portions bent and extended from both sides thereof, and a free end edge of one side wall portion of one U-shaped body is formed into another U-shaped body. A denier-type assembled fishway characterized in that a plurality of U-shaped bodies are connected in series by being fixed to the baffle plate of the body or in the vicinity thereof with bolts and nuts. 2. The denier according to claim 1, wherein a free end edge of the side wall portion of the U-shaped body is bent inward, and the bent portion is connected to the baffle plate. Type assembly fishway. 3. When the free end edge of the side wall portion of the U-shaped body is bent inward and the bent portions are connected to both sides of the baffle plate, a spacer is provided on one side. The denier-type assembled fishway according to claim 1, wherein the fishway is inserted and bent.