JP2021042539A - Water channel - Google Patents

Abstract

To provide a water channel capable of holding a wale material stably.SOLUTION: A water channel 1 comprises: a water channel body 2 that is made of a steel plate and that is formed in an U-shape by a pair of side wall parts 21 and a bottom part 22; wale materials 3 that are separated from each other in a width direction Y orthogonal to an extending direction X of the water channel body 2 and are installed in upper ends 21a of the pair of side wall parts 21 and that extend in the extending direction; and a strut 4 for connecting the wale materials 3 separated in the width direction Y, with each other. The water channel body 2 has a flange part 23 formed by bending a steel plate, in each upper end 21a of the pair of side wall parts 21, and the wale materials 3 are placed on the flange parts 23 and are joined to the flange parts 23 by bolts.SELECTED DRAWING: Figure 4

Description

The present invention relates to waterways.

Conventionally, waterways such as irrigation canals, agricultural waterways, and industrial waterways are known. Such a channel is installed in a groove dug in the ground using a U-shaped steel plate. As a technique related to a waterway, disclosure techniques of Patent Documents 1 to 5 have been proposed.

The corrugated flume of Patent Document 1 is characterized in that a girder having a water-repellent coating and a cross section consisting of a top and an inclined portion following the top is attached to the upper edge of the corrugated flume body with the top facing up. To do.

The method for designing a corrugated steel sheet in Patent Document 2 constitutes a corrugated steel sheet flume having a corrugated steel sheet having a wave depth of H, having a U shape on both side walls and a bottom, and having a straight bottom length d. This is a method for designing the corrugated shape of a corrugated steel sheet.

The method for manufacturing a stainless steel channel material for an angle portion in Patent Document 3 is for an angle portion in a stainless steel channel formed by connecting a plurality of stainless steel channel materials made of corrugated stainless steel having a corrugated cross section in the flow path direction in the flow path direction. This is a method for manufacturing stainless steel channel materials.

The corrugated steel plate water channel member of Patent Document 4 is a corrugated steel plate water channel member using a corrugated steel material having a corrugated cross section along the flow path direction, and the corrugated steel material is stainless steel.

The water channel of Patent Document 5 is a water channel body made of a corrugated steel plate bent in a U shape in a direction orthogonal to the wavy direction, and a bellows attached to the upper edge of the water channel body along the longitudinal direction of the water channel body. In a water channel composed of a raising material and a girder attached between the raising materials, the raising material is characterized in that it is attached to the water channel main body via a cushioning member.

Jikkenhei 1-167487 International Publication 2013/2095 JP-A-2015-169506 JP-A-2018-162594 JP-A-2018-76659

In the disclosed techniques of Patent Documents 1 to 5, a raising member is attached to the upper end of the U-shaped steel plate, and a girder is attached to the raising members. The water channel in which such a steel plate is used is installed on soft ground where liquefaction and uneven settlement are likely to occur, and a steel plate having a relatively thin thickness that is relatively easy to bend is used so that it can follow the fluctuation of the soft ground. Then, the bending of the steel plate is reduced by increasing the rigidity by the raising material and the girder.

By the way, when constructing a waterway in a heavy snowfall area, a snow load acts on the girder. In order to reduce the influence of the snow load, the number of girders may be reduced to increase the distance between the girders and the cross-sectional area of the abdominal material may be increased. However, by connecting the raised material having a large cross-sectional area to the upper end of the corrugated steel sheet having a thin plate thickness, a large load acts on the side wall portion of the corrugated steel sheet. In the conventional water channel 9, as shown in FIG. 10, when the corrugated steel plate 92 and the raised material 93 are connected, the raised material 93 is formed on the side wall portion 921 extending in the vertical direction of the corrugated steel plate 92 via the angle material 96. Be connected. A bolt hole 94 for connecting to the angle member 96 is formed in the side wall portion 921 of the corrugated steel plate 92 having a thin plate thickness, and a bolt 97 extending in the horizontal direction is penetrated through the bolt hole 94 to penetrate the angle member 96 and the corrugated steel plate. The 92 is bolted. The bolt 97 is arranged on the lower side of the abdominal raising member 93, and is provided at a predetermined interval in the flow direction. Therefore, in addition to the shearing force due to the load of the raising member 93, the shearing force due to the deformation of the corrugated steel plate acts on the bolt 97 so as to follow the uneven settlement and the like. As a result, the corrugated steel plate 92 may be broken from the bolt hole 94 of the side wall portion 921, the abdominal member 93 may not be stably held, and the function as a water channel may not be exhibited.

Therefore, the present invention has been devised in view of the above-mentioned problems, and an object of the present invention is to provide a water channel capable of stably holding the abdominal material. ..

The water channel according to the first invention uses a steel plate, is provided at a water channel main body formed in a U shape by a pair of side wall portions and a bottom portion, and an upper end portion of the pair of the side wall portions, and is provided in an extension direction of the water channel main body. The water channel main body includes a pair of side wall portions, which are provided with a swelling member spaced apart from each other in the width direction orthogonal to the width direction, and a girder for connecting the swelling members separated from each other in the width direction. Each upper end portion has a flange portion formed by bending a steel plate, and the uplifting material is placed on the flange portion and bolted to the flange portion.

According to the first invention, the water channel according to the second invention is formed by bending a steel plate so that one flange portion and the other flange portion are bent toward the outside of the water channel body. It is a feature.

In the first invention, the water channel according to the third invention is formed by bending a steel plate so that one flange portion and the other flange portion are bent toward the inside of the water channel body. It is a feature.

The water channel according to the fourth invention is characterized in that, in the first to third inventions, the water channel main body has the flange portion formed by bending a steel plate in a horizontal direction.

Regarding the water channel according to the fifth invention, in the first to third inventions, the water channel main body is bent so that the steel plate is inclined in the horizontal direction by connecting the raising material and the cutting beam. The flange portion formed in the above direction extends along the horizontal direction.

According to the present invention, it is possible to provide a water channel capable of stably holding the abdominal raising material.

FIG. 1 is a perspective view showing an example of a water channel according to the first embodiment. FIG. 2 is a plan view showing an example of a water channel according to the first embodiment. FIG. 3 is a front view showing an example of a water channel according to the first embodiment. FIG. 4 is an enlarged view of part a in FIG. FIG. 5 is a cross-sectional view taken along the line AA of FIG. FIG. 6 is a perspective view showing an example of a water channel according to the second embodiment before the girders are connected. 7 (a) is an enlarged view of a portion b of FIG. 6, and FIG. 7 (b) is an enlarged view showing a water channel according to a second embodiment in which a girder is connected. FIG. 8 is a front view showing an example of the water channel according to the third embodiment. FIG. 9 is an enlarged view of part c of FIG. It is a figure which shows the connection part of the corrugated steel plate and the raising material in a conventional water channel.

Hereinafter, a mode for carrying out a water channel to which the present invention is applied will be described in detail with reference to the drawings.

(First Embodiment)
FIG. 1 is a perspective view showing an example of a water channel 1 according to the first embodiment. FIG. 2 is a plan view showing an example of the water channel 1 according to the first embodiment. FIG. 3 is a front view showing an example of the water channel 1 according to the first embodiment. Hereinafter, the vertical direction Z is defined, the direction orthogonal to the vertical direction Z is defined as the stretching direction X, and the direction orthogonal to the vertical direction Z and the stretching direction X is defined as the width direction Y.

The water channel 1 is provided on soft ground where uneven subsidence and liquefaction are likely to occur. The waterway 1 is provided in a heavy snowfall area or the like. The water channel 1 includes a water channel main body 2, an abdominal raising member 3, and a girder 4.

A steel plate is used for the water channel main body 2. As the steel plate, a corrugated steel plate such as a corrugated steel plate is used. The water channel main body 2 has a pair of side wall portions 21 and 21 and a bottom portion 22 connecting the pair of side wall portions 21 and 21. The water channel main body 2 is formed in a U shape in a cross section orthogonal to the stretching direction X by the pair of side wall portions 21, 21 and the bottom portion 22.

The water channel body 2 is formed so as to extend in the stretching direction X. In the water channel main body 2, two steel plates formed in an L shape are bolted at the bottom 22 to form a U shape in cross section. The water channel main body 2 has a steel plate joint portion 25 in which steel plates adjacent to each other in the stretching direction X are bolted to each other. As the water channel main body 2, a steel plate formed in a U-shaped cross section may be used, and a plurality of steel plates may be bolted and connected in the stretching direction X and may be formed so as to extend in the stretching direction X.

FIG. 4 is an enlarged view of part a in FIG. The water channel main body 2 has a flange portion 23 formed by bending a steel plate at the upper end portion 21a of the side wall portion 21. One flange portion 23 and the other flange portion 23 separated from each other in the width direction Y are formed by being bent toward the outside of the water channel main body 2. The flange portion 23 is formed by extending a steel plate along the horizontal direction. When the end portion of the flange portion 23 on the side close to the side wall portion 21 is the base end portion 23a and the end portion on the side away from the side wall portion 21 is the tip portion 23b, the base end portion 23a and the tip portion 23b are formed. They are arranged at substantially the same height in the vertical direction Z. A through hole 24 is formed in the flange portion 23, and the bolt 8 is passed through the flange portion 23.

As shown in FIG. 3, the abdominal raising members 3 are placed in pairs on the flange portion 23 so as to be separated from each other in the width direction Y. For the abdominal raising material 3, for example, H-shaped steel is used. The abdominal raising material 3 may be an angle material formed in an L-shaped cross section, a C-shaped steel formed in a U-shaped cross section, or the like.

As shown in FIG. 4, the abdominal raising material 3 is formed with a through hole 31 through which the bolt 8 is penetrated. The abdominal raising member 3 is placed on the flange portion 23, and is bolted to the flange portion 23 of the water channel main body 2 by a bolt 8 penetrating through the through hole 24 and the through hole 31.

FIG. 5 is a cross-sectional view taken along the line AA of FIG. The girder 4 connects a pair of raising members 3 and 3 separated from each other in the width direction Y. For the girder 4, for example, a steel pipe is used. The girder 4 may be an angle member, a square steel pipe, a round steel, an H steel or the like formed in an L shape. The girder 4 is bolted to the abdominal member 3 via a mounting plate 41 made of a plate material.

According to the present embodiment, a steel plate is used, and a pair of a water channel main body 2 formed in a U shape by a pair of side wall portions and a bottom portion and a pair separated from each other in a width direction Y orthogonal to the extending direction X of the water channel main body 2. The water channel main body 2 includes a raising member 3 provided at the upper end portion 21a of the side wall portion 21 and a cutting beam 4 for connecting the raising members 3 separated from each other in the width direction Y. The upper end portion 21a has a flange portion 23 formed by bending a steel plate, and the raising member 3 is placed on the flange portion 23 and bolted to the flange portion 23. That is, the flange portion 23 of the water channel body 2 and the raising material 3 are directly bolted by the bolt 8 without interposing a member such as an angle member between the water channel main body 2 and the raising material 3. ..

As a result, it is sufficient to form a through hole 24 through which the bolt 8 is penetrated only in the flange portion 23, and it is not necessary to form a hole for fixing the angle member or the like in the portion extending in the vertical direction Z of the side wall portion 21. Therefore, the yield strength of the water channel main body 2 itself can be improved.

Even if the side wall portion 21 is deformed due to ground movement such as uneven subsidence, there is no hole for fixing the angle member or the like in the portion extending in the vertical direction Z of the side wall portion 21, so that the water channel main body 2 It is possible to suppress breakage of the side wall portion 21 and the like. Further, when the ground fluctuates, the deformation of the flange portion 23 is smaller than the deformation of the side wall portion 21, so that the bolt 8 can resist the shearing force between the abdominal member 3 and the flange portion 23, and the flange portion It is possible to suppress the breakage of 23. As a result, the abdominal raising material 3 can be stably held, and the function as a water channel can be exhibited.

Further, according to the present embodiment, the flange portion 23 of the water channel main body 2 and the raising member 3 are directly bolted together by the bolt 8. As a result, it is not necessary to interpose a member such as an angle member between the water channel main body 2 and the abdominal raising material 3, so that the work of connecting the water channel main body 2 and the abdominal raising material 3 can be performed in a short time. Therefore, it is possible to improve the workability.

Further, according to the present embodiment, the water channel main body 2 is formed by bending a steel plate in a direction in which one flange portion 23 and the other flange portion 23 are separated from each other. As a result, the water channel main body 2 can be stacked in the vertical direction Z. Therefore, when constructing the water channel 1, the water channel main body 2 can be stacked and transported in the vertical direction Z, and the workability can be improved.

(Second Embodiment)
FIG. 6 is a perspective view showing an example of the water channel 1 according to the second embodiment before the girder 4 is connected. 7 (a) is an enlarged view of a portion b of FIG. 6, and FIG. 7 (b) is an enlarged view showing a water channel 1 according to a second embodiment in which a cutting beam 4 is connected. FIG. 7B corresponds to the enlarged view of part b of FIG.

In the water channel 1 according to the second embodiment, the water channel main body 2 is formed by connecting the abdominal raising member 3 and the cutting beam 4 so that the steel plate is inclined and bent in the horizontal direction. Is different from the water channel 1 according to the first embodiment in that the water channel 1 extends along the horizontal direction.

That is, in the water channel main body 2 in the second embodiment, as shown in FIGS. 6 and 7 (a), the flange portion 23 is the tip portion 23b before the abdominal raising member 3 and the cutting beam 4 are connected. Is formed by bending the steel plate at an angle with respect to the horizontal direction so that the steel sheet is arranged above the base end portion 23a in the vertical direction Z. The flange portion 23 is formed by bending a steel plate in a direction away from each other.

Then, as shown in FIG. 7B, when the pair of raising members 3 separated in the width direction Y are connected by the cutting beam 4, the water channel main body 2 is connected to the raising member 3 in the horizontal direction by the raising member 3. The inclined flange portion 23 extends along the horizontal direction.

According to the present embodiment, in the water channel main body 2, the flange portion 23 formed by bending the steel plate inclined with respect to the horizontal direction by connecting the raising member 3 and the cutting beam 4 is formed in the horizontal direction. It will extend along. As a result, a force acts on the flange portion 23 to return to the original shape inclined with respect to the horizontal direction. Therefore, a force acts on the pair of raising members 3 separated in the width direction Y in the inner direction of the water channel main body 2, and this force is transmitted to the cutting beam 4. As a result, since the pair of abdominal members 3 are held constant by the girder 4, the abdominal members 3 can be held more stably.

(Third Embodiment)
FIG. 8 is a front view showing an example of the water channel 1 according to the third embodiment. FIG. 9 is an enlarged view of part c of FIG.

In the water channel 1 according to the third embodiment, the water channel body 2 is formed by bending a steel plate toward the inside of the water channel body 2 so that one flange portion 23 and the other flange portion 23 are formed from each other. 1 It is different from the water channel 1 according to the embodiment.

According to the present embodiment, the water channel main body 2 is formed by bending a steel plate from one flange portion 23 and the other flange portion 23 toward the inside of the water channel main body 2. As a result, the center of the load of the abdominal raising member 3 is arranged inside the water channel main body 2. Therefore, the pair of abdominal raising members 3 separated from each other in the width direction Y act as the pair of side wall portions 21 try to move toward the inside of the water channel body 2 with each other. The cutting beam 4 resists the force in the inward direction of the beam 4. As a result, since the pair of abdominal members 3 are held constant by the girder 4, the abdominal members 3 can be held more stably.

Although some of the embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. Moreover, these embodiments can be carried out in combination as appropriate. Furthermore, the present invention can be implemented in various novel embodiments in addition to the above-mentioned some embodiments. Therefore, each of the above-mentioned several embodiments can be omitted, replaced, or changed in various ways without departing from the gist of the present invention. Such novel forms and modifications are included in the scope and gist of the present invention, as well as in the scope of the invention described in the claims and the equivalent of the invention described in the claims.

1: Waterway 2: Waterway body 21: Side wall 21a: Upper end 22: Bottom 23: Flange 23a: Base end 23b: Tip 24: Through hole 25: Steel plate joint 3: Raising material 31: Through hole 4: Cutting beam 41: Mounting plate 8: Bolt 9: Water channel 92: Corrugated steel plate 921: Side wall part 93: Raising material 94: Bolt hole 96: Angle material 97: Bolt X: Stretching direction Y: Width direction Z: Up and down direction

Claims (5)

A water channel body in which a steel plate is used and formed in a U shape by a pair of side wall portions and a bottom portion,
A pair of abdominal raising members provided at the upper ends of the side wall portions and spaced apart from each other in the width direction orthogonal to the extending direction of the water channel body.
A girder for connecting the abdominal members separated in the width direction is provided.
The water channel body has a flange portion formed by bending a steel plate at the upper end portion of each of the pair of side wall portions.
A water channel characterized in that the abdominal raising material is placed on the flange portion and bolted to the flange portion. The water channel according to claim 1, wherein the water channel body is formed by bending a steel plate toward the outside of the water channel body so that one flange portion and the other flange portion are formed. The water channel according to claim 1, wherein the water channel body is formed by bending a steel plate toward the inside of the water channel body so that one flange portion and the other flange portion are formed. The water channel according to any one of claims 1 to 3, wherein the water channel body has the flange portion formed by bending a steel plate in a horizontal direction. In the water channel main body, the flange portion formed by bending the steel plate at an angle with respect to the horizontal direction extends along the horizontal direction by connecting the raising material and the girder. The water channel according to any one of claims 1 to 3, wherein the water channel is characterized in that.

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