Capturing body and dam

Abstract

To suppress production costs from drastically rising by reducing production labor while improving quality without increasing degree of difficulty in production.SOLUTION: A capturing body (3) includes an upstream unit (6) in which vertical members (61) and horizontal members (62) are connected via connecting members (63, 64), a downstream unit (7) in which vertical members (71) and horizontal members (72) are connected via connecting members (73, 74), and joining members (8) that join the upstream unit and the downstream unit. Each end of the upstream unit and the downstream unit is attached to a non-overflow section (1) constructed on both sides of the capturing body in the direction crossing the river, at least either the upstream unit or the downstream unit is bent so as to protrude toward the upstream side of the river, and the vertical members and connecting members, the vertical members and joining members, and the connecting members and joining members on the units bendingly formed are connected so that their axes form right angles to each other.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a trapping body and a weir.

Background Art

[0002] As a countermeasure for debris flow in a river, a weir (so-called permeable weir) equipped with a trapping body for trapping rocks, driftwood, etc. flowing from the upstream is known. The weir has a pair of non-overflow portions protruding from both banks of the river. An opening for passing water is provided between the non-overflow portions. The trapping body is provided at the opening, and while allowing sediment and water with a small diameter to pass through, it traps rocks, driftwood, etc. with a large diameter. The trapping body has an upstream unit facing the upstream side and a downstream unit facing the downstream side in the flow direction of the river, and the upstream unit and the downstream unit are connected. At least one of the upstream unit and the downstream unit is formed in an arch shape in order to successfully transmit the load acting on the trapping body due to debris flow to the base portion and the non-overflow portion (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When assembling an upstream unit and a downstream unit formed by connecting straight steel pipes in a lattice shape and bending them, at the connection portion between the vertical members and the horizontal members, it is necessary to connect them at different angles depending on the part, so there is a problem that the manufacturing difficulty is very high. Also, if the angles at which the steel pipes are connected vary depending on the part, the types of steel pipes required to manufacture each unit increase, resulting in an increase in the manufacturing effort, leading to problems such as a decrease in quality and an increase in manufacturing costs.

[0005] Therefore, the present invention has been made in view of the above problems, and even in the case of constructing by bending the capture body, it is possible to reduce the labor of production and improve the quality without increasing the difficulty of production, and to provide a technology capable of suppressing an increase in production cost.

Means for Solving the Problems

[0006] One aspect of the present invention is a capture body that allows flowing water flowing from the upstream of a river to pass through and captures objects contained in the flowing water. The capture body includes an upstream unit provided on the upstream side of the river, in which vertical members and horizontal members are connected via connecting members; a downstream unit provided on the downstream side of the river, in which vertical members and horizontal members are connected via connecting members; and a connecting member that connects the upstream unit and the downstream unit. Each end of the upstream unit and the downstream unit is attached to a non-overflow portion constructed on both sides in the direction crossing the river in the capture body. At least one of the upstream unit and the downstream unit is formed by bending so as to protrude toward the upstream side of the river. The vertical member, the connecting member, the vertical member and the connecting member, and the connecting member and the connecting member in the bent unit are connected such that their axes are perpendicular to each other.

[0007] Further, it is preferable that both the upstream unit and the downstream unit are formed by bending so as to protrude toward the upstream side of the river.

[0008] Further, the connecting member extends linearly, and it is preferable that all angles formed by the axes of adjacent connecting members in the direction crossing the river in the capture body are equal.

[0009] Further, a first connecting member that connects one adjacent horizontal member and a second connecting member that connects the other adjacent horizontal member are connected to the vertical member of each unit, and it is preferable that the axis of the first connecting member and the axis of the second connecting member are on the same straight line.

[0010] Also, it is preferable that the first connecting members and the second connecting members in each vertical member are all formed to have the same size.

[0011] Also, it is preferable that a plurality of the first connecting members and the second connecting members are provided in one vertical member.

[0012] Also, in the bent unit, it is preferable that all the horizontal members whose both ends are connected to the connecting members are formed to have the same size.

[0013] Also, the connecting member has a first connecting member whose one end is connected to the upstream unit and a second connecting member whose one end is connected to the downstream unit, and it is preferable that the first connecting member and the second connecting member are all formed to have the same size.

[0014] Also, all the connecting members extend linearly along the direction from the upstream to the downstream of the river, and it is preferable that the distances between the axes of the connecting members adjacent to each other in the direction crossing the river in the capture body are all equal.

[0015] Also, the upstream unit and the downstream unit are both bent so as to protrude toward the upstream side of the river, and it is preferable that all the horizontal members whose both ends are connected to the connecting members are formed to have the same size.

[0016] Also, the horizontal member has a pipe formed linearly and a joint provided at an end of the pipe and connected to the connecting member, and in the bent unit, it is preferable that the thickness of the joint is different so that the joint surface is perpendicular to the axis of the pipe.

[0017] Also, the horizontal member has a pipe formed linearly and a joint provided at an end of the pipe and connected to the connecting member, and the connecting member has a pipe formed linearly and a joint provided at an end of the pipe and connected to the horizontal member, and it is preferable that the joint of the horizontal member and the joint of the connecting member in the bent unit are connected via a spacer.

[0018] One aspect of the present invention relates to a weir, which is characterized by comprising a pair of non-overflow portions protruding from both banks of a river respectively, and the above-mentioned capture body provided at an opening between the pair of non-overflow portions.

Advantages of the Invention

[0019] According to one aspect of the present invention, even when the capture body is bent and constructed, it is possible to reduce the manufacturing labor and improve the quality without increasing the manufacturing difficulty, and suppress the increase in manufacturing cost.

Brief Description of the Drawings

[0020]

Figure 1

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Mode for Carrying Out the Invention

[0021] Preferred embodiments of the present invention will be described with reference to the drawings.

[0022] <Configuration of the Dam> As shown in FIGS. 1 to 3, the dam 100 is generally called a permeable dam, and includes a pair of non-overflow parts 1, an opening 2, a capture body 3, and a gantry 4. In the following, the vertical direction refers to the height direction of the dam 100 (the depth direction of the river), and the horizontal direction refers to the width direction of the dam 100 (the width direction of the river) perpendicular to the height direction of the dam 100.

[0023] The non-overflow part 1 is, for example, a wall formed of concrete. The pair of non-overflow parts 1 extend from both banks of the river toward the center of the river so as to cross the river. A predetermined interval is provided between the pair of non-overflow parts 1, and an opening 2 is formed. The non-overflow part 1 is constructed by pouring concrete upward into a foundation formed on the riverbed.

[0024] The opening 2 is a space formed between the pair of non-overflow parts 1, and the capture body 3 is installed therein. Thereby, while capturing large rocks and driftwood contained in the debris flow with the capture body 3, water, sand, gravel, etc. are allowed to pass through. A foundation 21 is formed at the bottom of the opening 2. The foundation 21 is formed on the riverbed and is formed of, for example, concrete.

[0025] The capture body 3 allows flowing water to pass through from the upstream of the river and captures objects such as large rocks and driftwood. At the opening 2, it is attached to the foundation 21 of the opening 2 and the side surfaces of the non-overflow parts 1 on both sides in the flowing direction of the river (both sides in the direction across the river). The capture body 3 is applied to, for example, a high dam. Here, the "high dam" refers to a dam with a height (dam height) of 15 m or more from the riverbed (bottom) where the foundation of the dam is installed to the upper end of the capture body 3. High dams are mainly provided on large rivers and rivers where a large amount of debris flow is predicted.

[0026] The capture body 3 includes an upstream unit 6, a downstream unit 7, and a connecting member 8. The upstream unit 6 is provided on the upstream side of the river and is a functional member that captures objects such as rocks and driftwood contained in the debris flow flowing from the upstream side of the dam 100. That is, the upstream unit 6 is the unit directly affected by the impact of the debris flow. When viewed in plan, the upstream unit 6 is provided along the direction across the river, and is bent so that the central part in its extending direction protrudes toward the upstream of the river. That is, the upstream unit 6 adopts a curved arch structure, and has a structure that reduces the combined stress degree with respect to the temperature stress of the upstream unit 6 (the internal stress generated in the structure due to temperature changes (for example, the stress associated with the expansion and contraction of each component due to changes in the outside air temperature, etc.)). The upstream unit 6 has a plurality of vertical members 61 and a plurality of horizontal members 62 connected via connecting members 63, 64.

[0027] The plurality of vertical members 61 are provided along the height direction of the dam 100 and are connected to the horizontally adjacent members 62. The plurality of vertical members 61 are arranged side by side along the width direction of the dam 100. The interval between adjacent vertical members 61 is preferably made smaller than the diameter of the rocks to be captured during the occurrence of debris flow. Also, the intervals between adjacent vertical members 61 are all the same along the extending direction of the upstream unit 6. The vertical member 61 is formed of, for example, a steel pipe (pipe material) formed in a cylindrical shape with the axis along the longitudinal direction being a straight line. In the capture body 3, a plurality of vertical members 61 are connected in the longitudinal direction, and each vertical member 61 is connected to each other via flange portions (joints) provided at the longitudinal ends. For example, the capture body 3 includes four types of vertical members 61. Note that each vertical member 61 may be connected by welding the ends to each other without providing flange portions, but considering the replacement work after a debris flow collision, connection using flange portions is preferable.

[0028] Each vertical member 61 includes a plurality of connecting members 63, 64 that connect to the cross member 62 between the longitudinal ends. All of the connecting members 63, 64 in the upstream unit 6 are formed in the same shape and size. As shown in FIG. 4, in the vertical member 611 that is disposed at the lowest position in the capture body 3 and whose lower end is buried in the foundation 21 of the opening 2, between the longitudinal ends, there is provided one first connecting member 63 that connects one adjacent cross member 62 and one second connecting member 64 that connects the other adjacent cross member 62. The paired first connecting member 63 and second connecting member 64 are provided at positions having the same height. The first connecting member 63 and the second connecting member 64 are formed in a cylindrical shape, for example, and have steel pipes (pipe materials) 63a, 64a with the axis along the longitudinal direction being a straight line, and flange portions (joints) 63b, 64b provided at both ends of the steel pipes 63a, 64a. The first connecting member 63 and the second connecting member 64 extend in a direction orthogonal to the longitudinal direction (axis direction) of the vertical member 611, one end is joined to the vertical member 611 by welding or the like, and flange portions 63b, 64b for connecting to the cross member 62 are provided at the other end. Note that one end of the first connecting member 63 and the second connecting member 64 may be connected to the vertical member 61 via a flange portion. Here, as shown in FIG. 4, the first connecting member 63 and the second connecting member 64 are provided on the vertical member 611 such that the angle θ1 formed by their respective axes is 180 degrees, that is, each axis exists on the same straight line.

[0029] As shown in FIG. 5, in the vertical member 612 disposed in the second stage from the bottom in the capturing body 3, one first connecting member 63 that connects one adjacent horizontal member 62 and one second connecting member 64 that connects the other adjacent horizontal member 62 are provided between the longitudinal ends. The paired first connecting member 63 and second connecting member 64 are provided at the same height position. The first connecting member 63 and the second connecting member 64 are formed, for example, in a cylindrical shape and have steel pipes (pipe materials) 63a and 64a whose axes along the longitudinal direction are straight lines, and flange portions (joints) 63b and 64b provided at both ends of the steel pipes 63a and 64a. The first connecting member 63 and the second connecting member 64 extend in a direction orthogonal to the longitudinal direction (axial direction) of the vertical member 612, one end is joined to the vertical member 612 by welding or the like, and flange portions 63b and 64b for connecting to the horizontal member 62 are provided at the other end. Note that one end of the first connecting member 63 and the second connecting member 64 may be connected to the vertical member 612 via a flange portion. Here, as shown in FIG. 5, the first connecting member 63 and the second connecting member 64 are provided on the vertical member 612 such that the angle θ2 formed by their respective axes is 180 degrees, that is, the respective axes exist on the same straight line.

[0030] As shown in FIG. 6, in the vertical member 613 disposed in the third to fifth stages from the bottom in the capturing body 3, two first connecting members 63 that connect one adjacent horizontal member 62 and two second connecting members 64 that connect the other adjacent horizontal member 62 are provided between the longitudinal ends. The paired first connecting member 63 and second connecting member 64 are provided at the same height position. The first connecting member 63 and the second connecting member 64 are formed, for example, in a cylindrical shape and have steel pipes (pipe materials) 63a and 64a whose axes along the longitudinal direction are straight lines, and flange portions (joints) 63b and 64b provided at both ends of the steel pipes 63a and 64a. The first connecting member 63 and the second connecting member 64 extend in a direction orthogonal to the longitudinal direction (axial direction) of the vertical member 613, one end is joined to the vertical member 613 by welding or the like, and flange portions 63b and 64b for connecting to the horizontal member 62 are provided at the other end. Note that one end of the first connecting member 63 and the second connecting member 64 may be connected to the vertical member 613 via a flange portion. Here, as shown in FIG. 6, the first connecting members 63 and the second connecting members 64 are provided on the vertical member 613 such that the angle θ3 formed by their respective axes is all 180 degrees, that is, each axis exists on the same straight line.

[0031] As shown in FIG. 7, on the vertical member 614 disposed at the uppermost position in the capturing body 3, between the longitudinal ends, there are provided two first connecting members 63 that connect one adjacent cross member 62 and two second connecting members 64 that connect the other adjacent cross member 62. The paired first connecting members 63 and second connecting members 64 are provided at the same height position. The first connecting members 63 and the second connecting members 64 are formed, for example, in a cylindrical shape, and have steel pipes (pipe materials) 63a, 64a whose axes along the longitudinal direction are straight lines, and flange portions (joints) 63b, 64b provided at both ends of the steel pipes 63a, 64a. The first connecting members 63 and the second connecting members 64 extend in a direction orthogonal to the longitudinal direction (axis direction) of the vertical member 614, one end is joined to the vertical member 614 by welding or the like, and flange portions 63b, 64b for connecting to the cross member 62 are provided at the other end. Note that one end of the first connecting members 63 and the second connecting members 64 may be connected to the vertical member 614 via a flange portion. Here, as shown in FIG. 7, the first connecting members 63 and the second connecting members 64 are provided on the vertical member 614 such that the angle θ4 formed by their respective axes is all 180 degrees, that is, each axis exists on the same straight line.

[0032] The plurality of cross members 62 are provided along the direction crossing the river, and are arranged side by side along the height direction of the dam 100. It is preferable that the interval between adjacent cross members 62 is made smaller than the diameter of the rocks to be captured when a debris flow occurs. Also, the interval between adjacent cross members 62 may be the same throughout from the upper end to the lower end of the capturing body 3, or can be freely changed according to the assumed scale of the debris flow, such as narrowing the interval only above the capturing body 3. As shown in Fig. 8, the cross member 62 has, for example, a steel pipe (pipe material) 62a formed in a cylindrical shape with a straight axis along the longitudinal direction, and flange portions (joints) 62b provided at both ends of the steel pipe 62a. Each cross member 62 is connected to the flange portions 63b and 64b of the first connecting member 63 and the second connecting member 64 of the vertical member 61 via the flange portion 62b provided at the longitudinal end. Note that each cross member 62 may be connected by welding the ends to each other without providing a flange portion, but considering the replacement work after a debris flow collision, connection using a flange portion is preferred. Also, the angle formed by the axis of the steel pipe 62a and the flange surfaces of the flange portions 63b and 64b is not a right angle so that the first connecting member 63, the second connecting member 64, and the cross member 62 form an arch shape. In other words, both ends of the steel pipe 62a are cut so as to be inclined rather than perpendicular to the axis of the steel pipe 62a. Therefore, the axis of the steel pipe 62a and the axes of the flange portions 63b and 64b are not parallel. All the cross members 62 provided in the upstream unit 6 are formed in the same shape and size. Among the cross members 62, the cross members 62 arranged on the outermost side in the river width direction have one longitudinal end attached to the side wall of the non-overflow portion 1 facing each other. Specifically, as shown in Fig. 3, the ends of the cross member 62 are connected to the gantry 4, and by embedding this gantry 4 in the non-overflow portion 1, each cross member 62 is fixed to the non-overflow portion 1.

[0033] The downstream unit 7 is provided on the downstream side of the river as viewed from the upstream unit 6, and the impact load of the debris flow acting on the upstream unit 6 is transmitted via the connecting member 8 to support the capture body 3. The downstream unit 7 is provided along the direction crossing the river when viewed in plan view of the weir 100, and is bent so that the central portion in its extending direction protrudes toward the upstream unit 6. That is, the downstream unit 7 adopts a curved arch structure and is a structural member that supports the impact load of the debris flow transmitted from the upstream unit 6 via the connecting member 8 with a compressive force. The downstream unit 7 is formed so as to extend along the upstream unit 6. The downstream unit 7 has a plurality of vertical members 71 and a plurality of horizontal members 72 connected via connecting members 73, 74. Here, the downstream unit 7 includes vertical members 71, a first connecting member 73, and a second connecting member 74 having the same shape, size, and arrangement as the vertical member 61, the first connecting member 63, and the second connecting member 64 in the upstream unit 6, and only the horizontal member 72 is different. That is, the downstream unit 7 is configured to be able to share the vertical member 61, the first connecting member 63, and the second connecting member 64 that make up the upstream unit 6.

[0034] The plurality of vertical members 71 are provided along the height direction of the weir 100, and the horizontal members 72 adjacent in the height direction are connected. The plurality of vertical members 71 are arranged side by side along the width direction of the weir 100. It is preferable that the interval between adjacent vertical members 71 is smaller than the diameter of the rocks to be captured when a debris flow occurs. Also, the intervals between adjacent vertical members 71 are all the same along the extending direction of the downstream unit 7. The vertical member 71 is formed, for example, in a cylindrical shape and is made of a steel pipe (pipe material) whose axis along the longitudinal direction is a straight line. In the capture body 3, a plurality of vertical members 71 are connected in the longitudinal direction, and each vertical member 71 is connected to each other via flange portions (joints) provided at the longitudinal ends. For example, the capture body 3 includes four types of vertical members 71. Each vertical member 71 may be connected by welding the ends to each other without providing flange portions, but considering the replacement work after a debris flow collision, connection using flange portions is preferable.

[0035] Each vertical member 71 includes a plurality of connecting members 73, 74 that connect to the horizontal member 72 between the longitudinal ends. The connecting members 73, 74 in the downstream unit 7 are all formed in the same shape and size. As shown in FIG. 4, in the capturing body 3, a vertical member 711, which is disposed at the lowermost position and has its lower end embedded in the foundation 21 of the opening 2, is provided with a first connecting member 73 for connecting one adjacent horizontal member 72 and a second connecting member 74 for connecting the other adjacent horizontal member 72 between the longitudinal ends. The paired first connecting member 73 and second connecting member 74 are provided at the same height position. The first connecting member 73 and the second connecting member 74 are formed, for example, in a cylindrical shape and have steel pipes (pipe materials) 73a, 74a whose axes along the longitudinal direction are straight lines, and flange portions (joints) 73b, 74b provided at both ends of the steel pipes 73a, 74a. The first connecting member 73 and the second connecting member 74 extend in a direction orthogonal to the longitudinal direction (axis direction) of the vertical member 711, one end is joined to the vertical member 711 by welding or the like, and flange portions 73b, 74b for connecting to the horizontal member 72 are provided at the other end. Note that one end of the first connecting member 73 and the second connecting member 74 may be connected to the vertical member 71 via a flange portion. Here, as shown in FIG. 4, the first connecting member 73 and the second connecting member 74 are provided on the vertical member 711 such that the angle θ1 formed by their respective axes is 180 degrees, that is, each axis exists on the same straight line.

[0036] As shown in Fig. 5, in the vertical member 712 disposed in the second stage from the bottom in the capturing body 3, between the longitudinal ends, there is provided one first connecting member 73 for connecting one adjacent horizontal member 72 and one second connecting member 74 for connecting the other adjacent horizontal member 72. The paired first connecting member 73 and second connecting member 74 are provided at the same height position. The first connecting member 73 and the second connecting member 74 are formed, for example, in a cylindrical shape, and have steel pipes (pipe materials) 73a, 74a whose axes along the longitudinal direction are straight lines, and flange portions (joints) 73b, 74b provided at both ends of the steel pipes 73a, 74a. The first connecting member 73 and the second connecting member 74 extend in a direction orthogonal to the longitudinal direction (axis direction) of the vertical member 712, one end is joined to the vertical member 712 by welding or the like, and flange portions 73b, 74b for connecting to the horizontal member 72 are provided at the other end. Note that one end of the first connecting member 73 and the second connecting member 74 may be connected to the vertical member 712 via a flange portion. Here, as shown in Fig. 5, the first connecting member 73 and the second connecting member 74 are provided on the vertical member 712 such that the angle θ2 formed between their respective axes is 180 degrees, that is, the respective axes exist on the same straight line.

[0037] As shown in Fig. 6, in the vertical member 713 disposed in the third to fifth stages from the bottom in the capturing body 3, between the longitudinal ends, there are provided two first connecting members 73 for connecting one adjacent horizontal member 72 and two second connecting members 74 for connecting the other adjacent horizontal member 72. The paired first connecting member 73 and second connecting member 74 are provided at the same height position. The first connecting member 73 and the second connecting member 74 are formed, for example, in a cylindrical shape, and have steel pipes (pipe materials) 73a, 74a whose axes along the longitudinal direction are straight lines, and flange portions (joints) 73b, 74b provided at both ends of the steel pipes 73a, 74a. The first connecting member 73 and the second connecting member 74 extend in a direction orthogonal to the longitudinal direction (axis direction) of the vertical member 713, one end is joined to the vertical member 713 by welding or the like, and flange portions 73b, 74b for connecting to the horizontal member 72 are provided at the other end. Note that one end of the first connecting member 73 and the second connecting member 74 may be connected to the vertical member 713 via a flange portion. Here, as shown in FIG. 6, the first connecting members 73 and the second connecting members 74 are provided on the vertical member 713 such that the angle θ3 formed between their respective axes is 180 degrees in all cases, that is, each axis exists on the same straight line.

[0038] As shown in FIG. 7, on the vertical member 714 disposed at the uppermost position in the capturing body 3, two first connecting members 73 for connecting one adjacent cross member 72 and two second connecting members 74 for connecting the other adjacent cross member 72 are provided between the longitudinal ends. The paired first connecting members 73 and second connecting members 74 are provided at the same height position. The first connecting members 73 and the second connecting members 74 are formed, for example, in a cylindrical shape and have steel pipes (pipe materials) 73a, 74a whose axes along the longitudinal direction are straight lines, and flange portions (joints) 73b, 74b provided at both ends of the steel pipes 73a, 74a. The first connecting members 73 and the second connecting members 74 extend in a direction orthogonal to the longitudinal direction (axis direction) of the vertical member 714, one end is joined to the vertical member 714 by welding or the like, and flange portions 73b, 74b for connecting to the cross member 72 are provided at the other end. Note that one end of the first connecting members 73 and the second connecting members 74 may be connected to the vertical member 714 via a flange portion. Here, as shown in FIG. 7, the first connecting members 73 and the second connecting members 74 are provided on the vertical member 714 such that the angle θ4 formed between their respective axes is 180 degrees in all cases, that is, each axis exists on the same straight line.

[0039] The plurality of cross members 72 are provided along the direction crossing the river, and are arranged side by side along the height direction of the weir 100. It is preferable that the interval between adjacent cross members 72 is made smaller than the diameter of the rocks to be captured when a debris flow occurs. Also, the interval between adjacent cross members 72 may be the same throughout from the upper end to the lower end of the capturing body 3, or can be freely changed according to the assumed scale of the debris flow, such as narrowing the interval only above the capturing body 3. As shown in FIG. 9, the cross member 72 has, for example, a steel pipe (pipe material) 72a formed in a cylindrical shape with the axis along the longitudinal direction being a straight line, and flange portions (joints) 72b provided at both ends of the steel pipe 72a. Each cross member 72 is connected to the flange portions 73b and 74b of the first connecting member 73 and the second connecting member 74 of the vertical member 71 via the flange portions 72b provided at the longitudinal ends. Note that each cross member 72 may be connected by welding the ends to each other without providing flange portions, but considering the replacement work after a debris flow collision, connection using flange portions is preferable. Also, the angles formed between the axis of the steel pipe 72a and the flange surfaces of the flange portions 73b and 74b are not perpendicular so that the first connecting member 73, the second connecting member 74, and the cross member 72 form an arch shape. In other words, both ends of the steel pipe 72a are cut so as to be inclined rather than perpendicular to the axis of the steel pipe 72a. Therefore, the axis of the steel pipe 72a and the axes of the flange portions 73b and 74b are not parallel. All the cross members 72 provided in the downstream unit 7 are formed in the same shape and size. Among the cross members 72, the cross members 72 arranged on the outermost side in the river width direction have one longitudinal end attached to the side walls of the non-overflow portion 1 facing each other. Specifically, as shown in FIG. 3, the ends of the cross members 72 are connected to the gantry 4, and by embedding this gantry 4 in the non-overflow portion 1, each cross member 72 is fixed to the non-overflow portion 1. The cross members 72 in the downstream unit 7 are formed shorter than the cross members 62 in the upstream unit 6.

[0040] The connecting member 8 connects the upstream unit 6 and the downstream unit 7. The connecting member 8 connects the vertical members 61 (611 to 614) of the upstream unit 6 and the vertical members 71 (711 to 714) of the downstream unit 7 that face each other. That is, similar to the cross members 62 and 72, the connecting member 8 is arranged side by side along the height direction of the weir 100. Therefore, the interval between adjacent connecting members 8 is provided to be smaller than the diameter of the rocks to be captured when a debris flow occurs. Also, similar to the cross members 62 and 72, the interval between adjacent connecting members 8 may be the same throughout from the upper end to the lower end of the capturing body 3, or can be freely changed according to the assumed scale of the debris flow, such as narrowing the interval only above the capturing body 3. The connecting member 8 has a first connecting member 81 whose one end is connected to the vertical member 61 of the upstream unit 6 by welding or the like, and a second connecting member 82 whose one end is connected to the vertical member 71 of the downstream unit 7 by welding or the like. The first connecting member 81 has, for example, a steel pipe (pipe material) 81a formed in a cylindrical shape with an axis along the longitudinal direction being a straight line, and a flange portion (joint) 81b provided at the other end of the steel pipe 81a. The first connecting member 81 is connected to the vertical member 61 such that its axis is orthogonal to the axis of the vertical member 61. The first connecting member 81 is connected to the vertical member 61 such that its axis is orthogonal to the axes of the connecting members 63 and 64. The second connecting member 82 has, for example, a steel pipe (pipe material) 82a formed in a cylindrical shape with an axis along the longitudinal direction being a straight line, and a flange portion (joint) 82b provided at the other end of the steel pipe 82a. The second connecting member 82 is connected to the vertical member 71 such that its axis is orthogonal to the axis of the vertical member 71. The second connecting member 82 is connected to the vertical member 71 such that its axis is orthogonal to the axes of the connecting members 73 and 74. All of the first connecting member 81 and the second connecting member 82 provided on the capturing body 3 are formed in the same shape and size, and by connecting the flange portions 81b and 82b of each other, they constitute a connecting member 8 that is connected and extends in a straight line. At this time, the angles θ formed by the axes of the adjacent connecting members 8 in the direction crossing the river in the capturing body 3 are all equal. Note that the first connecting member 81 and the second connecting member 82 are not necessarily limited to the connection using flange portions, and may be joined by welding or the like.

[0041] The pedestal 4 is erected on the foundation of the non-overflow section 1. The pedestal 4 is connected to the capture body 3 and is buried in the non-overflow section 1 in a state of being connected to the capture body 3 when the weir 100 is completed. The pedestal 4 is used to firmly fix the capture body 3 to the non-overflow section 1. For one non-overflow section 1, the pedestal 4 is provided at positions facing the end of the cross member 62 of the upstream unit 6 and at positions facing the end of the cross member 72 of the downstream unit 7. A plurality of pedestals 4 are connected along the height direction of the non-overflow section 1 and are provided at positions where the cross members 62 and 72 of the capture body 3 can be connected. The pedestal 4 includes a plurality of vertical portions 41, a plurality of horizontal portions 42, and a plurality of connecting portions 43.

[0042] The plurality of vertical portions 41 are provided along the height direction of the weir 100. The vertical portion 41 is formed, for example, in a cylindrical shape and is formed from a steel pipe whose axis along the longitudinal direction is a straight line. Flange portions are provided at both ends of the vertical portion 41. The axial direction ends of the respective vertical portions 41 are connected to each other via the flange portions. The lowermost vertical portion 41 is directly provided on the foundation of the non-overflow section 1 and is buried in the foundation. As a result, the lower end portion of the pedestal 4 is erected on the foundation.

[0043] The plurality of horizontal portions 42 are provided so as to intersect (orthogonally) the vertical portion 41 in the middle of the axial direction of the vertical portion 41 and are arranged side by side along the height direction of the weir 100. The horizontal portion 42 is formed, for example, in a cylindrical shape and is formed from a steel pipe whose axis along the longitudinal direction is a straight line. Each horizontal portion 42 is connected to the cross members 62 and 72 of the capture body 3 via a flange portion provided at one end in the axial direction thereof. Each horizontal portion 42 is provided so as to penetrate a part of the vertical portion 41 and is joined to the vertical portion 41 at the intersection portion. That is, the pedestal 4 is configured as an integrated cross pipe that is formed by joining the steel pipe constituting the vertical portion 41 and the steel pipe constituting the horizontal portion 42 to each other and that is substantially cross-shaped in a front view. Each horizontal part 42 is provided such that one end in the longitudinal direction is exposed from the non-overflow part 1 to the opening part 2, and is arranged so as to be connectable to the horizontal members 62 and 72 at this one end. Each connecting part 43 connects the horizontal parts 42 at the same height. The connecting parts 43 are arranged side by side along the height direction of the weir 100. The connecting part 43 is formed, for example, in a cylindrical shape and is formed from a steel pipe whose axis along the longitudinal direction is a straight line. The pedestal 4 is embedded in the non-overflow part 1 except for the connecting part of the horizontal part 42 with the horizontal members 62 and 72 of the capturing body 3. By embedding the pedestal 4 in the non-overflow part 1, the ends of the respective horizontal members 62 and 72 are fixed to the non-overflow part 1 via the pedestal 4, and the capturing body 3 is fixed to the side wall of the non-overflow part 1. The pedestal 4 extends in the height direction of the non-overflow part 1 by connecting a plurality of ends of the vertical parts 41 to each other.

[0044] According to the capturing body 3 and the weir 100 as described above, even when the capturing body 3 is bent and constructed, the vertical members 61 and 71, the connecting members 63, 64, 73, and 74, the vertical members 61 and 71 and the connecting member 8, and the connecting members 63, 64, 73, and 74 and the connecting member 8 are connected such that their axes are perpendicular to each other. Therefore, angle management, which is extremely difficult during connection, is not required, and production using jigs at the manufacturing site can be performed in the same manner as normal production. In addition, since the connecting members 63, 64, 73, and 74 and the connecting member 8 at the connecting part between the vertical members 61 and 71 and the horizontal members 62 and 72 can be made common, the types of members to be manufactured can be significantly reduced, and reduction of manufacturing costs, improvement of quality, improvement of manufacturing efficiency, and simplification of inventory management can be achieved. In addition, since the member configuration at the connecting part between the vertical members 61 and 71 and the horizontal members 62 and 72 can be made common, all the horizontal members 62 and 72 in each unit 6 and 7 can also be formed in the same shape and size. In addition, the connecting member 8 is connected so as to extend linearly, and since the angles formed by the axes of the respective connecting members 8 adjacent to each other in the direction crossing the river in the capturing body 3 are all equal, the load acting on the capturing body 3 can be more evenly dispersed. Therefore, without increasing the difficulty of manufacturing the bent capture body 3, the manufacturing effort can be reduced, the quality can be improved, and the increase in manufacturing cost can be suppressed. In addition, since the capture body 3 is attached to the non-overflow part 1, even if the rocks and driftwood contained in the debris flow climb over the upper ends of the upstream unit 6 and the downstream unit 7 and fall below the capture body 3, it is difficult for the fallen rocks and driftwood to collide with the capture body 3, and damage to the capture body 3 can be suppressed. In addition, since the capture body 3 is connected to the gantry 4 embedded in the concrete for constructing the non-overflow part 1, the capture body 3 is firmly fixed to the non-overflow part 1. Thereby, the impact load due to the collision of the debris flow acting on the capture body 3 can be efficiently transmitted to the non-overflow part 1, and the resistance of the capture body 3 against punching and pulling out is improved.

[0045] <Modification Example 1> Moreover, a dam 200 provided with a capture body 3A as shown in FIG. 10 may be used. The capture body 3A is obtained by arranging all the connecting members 8 along the flow direction of the river (the direction from the upstream to the downstream of the river) in the capture body 3 shown in FIGS. 1 to 3, and changing the shape of the cross member accordingly. Hereinafter, the differences between the capture body 3A and the capture body 3 will be described, and the same reference numerals will be given to the common points and the description will be omitted. As shown in FIG. 10, the capture body 3A includes an upstream unit 6A, a downstream unit 7A, and a connecting member 8. The upstream unit 6A is bent so as to protrude toward the upstream side of the river. The upstream unit 6A is not formed to be curved in an arc shape in plan view like the upstream unit 6 described above, but is formed to be bent in a polygonal line shape in plan view. The upstream unit 6A includes a vertical member 61, a cross member 62A, and connecting members 63 and 64. Similar to the upstream unit 6 described above, the vertical member 61, the connecting members 63 and 64, the vertical member 61 and the first connecting member 81, and the connecting members 63 and 64 and the first connecting member 81 are connected such that their axes are perpendicular to each other. All the first connecting members 81 extend linearly along the flow direction of the river (the direction from the upstream to the downstream of the river), and are arranged such that the distances L between the axes of each adjacent first connecting member 81 in the direction crossing the river in the capture body 3 are all equal. Therefore, each first connecting member 81 is arranged with its position shifted along the flow direction of the river. For this reason, the vertical member 61 and the connecting members 63 and 64 to which the first connecting member 81 is connected are also arranged with their positions shifted along the flow direction of the river. At this time, each first connecting member 81 is shifted by the same distance in the flow direction of the river from the adjacent first connecting member 81. The cross member 62A connects the connecting members 63 and 64 in the adjacent vertical member 61. One end of the steel pipe (pipe material) 62Aa constituting the cross member 62A is offset in the direction along its end face with respect to the other end. That is, the cross member 62A extends in a direction obliquely intersecting the width direction when the upstream unit 6A is viewed in plan. The flange portions (joints) 62Ab provided at both ends of the steel pipe 62Aa are provided such that their joint surfaces intersect obliquely with respect to the axis of the steel pipe 62Aa. When the flange portion 62Ab and the connecting members 63 and 64 are connected, their butting surfaces are along the flow direction of the river. As a result, all the cross members 62A are formed in the same shape and size.

[0046] The downstream unit 7A is formed by bending so as to protrude toward the upstream of the river. The downstream unit 7A is not formed to be curved in an arc shape in plan like the downstream unit 7 described above, but is formed by bending in a polygonal line shape in plan. The downstream unit 7A includes a vertical member 71, a cross member 72A, and connecting members 73 and 74. Similar to the downstream unit 7 described above, the vertical member 71, the connecting members 73 and 74, the vertical member 71 and the second connecting member 82, and the connecting members 73 and 74 and the second connecting member 82 are connected such that their axes are perpendicular to each other. All the second connecting members 82 extend linearly along the flow direction of the river (the direction from the upstream to the downstream of the river), and are arranged such that the distance L between the axes of adjacent second connecting members 82 in the direction crossing the river in the capture body 3 is all equal. Therefore, each second connecting member 82 is arranged with its position shifted along the flow direction of the river. For this reason, the vertical member 71 and the connecting members 73 and 74 to which the second connecting member 82 is connected are also arranged with their positions shifted along the flow direction of the river. At this time, each second connecting member 82 is shifted by the same distance in the flow direction of the river from the adjacent second connecting member 82. The horizontal member 72A connects the connecting members 73 and 74 in the adjacent vertical member 71. One end of the steel pipe (pipe material) 72Aa constituting the horizontal member 72A is offset in the direction along its end face with respect to the other end. That is, the horizontal member 72A extends in a direction obliquely intersecting the width direction when the upstream unit 7A is viewed in plan. The flange portions (joints) 72Ab provided at both ends of the steel pipe 72Aa are provided such that their joint surfaces intersect obliquely with respect to the axis of the steel pipe 72Aa, and when the flange portion 72Ab and the connecting members 73 and 74 are connected, their butting surfaces are along the flow direction of the river. As a result, all the horizontal members 72A are formed in the same shape and size. Also, since the intervals between the connecting members 8 are equal, all the horizontal members 62A with both ends connected to the connecting members 63 and 64 and the horizontal members 72A with both ends connected to the connecting members 73 and 74 are formed in the same shape and size.

[0047] The first connecting member 81 and the second connecting member 82 constituting the connecting member 8 are connected so as to extend linearly along the flow direction of the river. The upstream unit 6A and the downstream unit 7A are connected to the gantry 4, and the gantry 4 is buried in the non-overflow portion 1.

[0048] According to the capture body 3A and the dam 200 as described above, even when the capture body 3A is bent and constructed, the vertical members 61, 71 and the connecting members 63, 64, 73, 74, the vertical members 61, 71 and the connecting member 8, and the connecting members 63, 64, 73, 74 and the connecting member 8 are connected such that their axes are perpendicular to each other. Therefore, angle management, which is extremely difficult during connection, becomes unnecessary, and production using jigs at the manufacturing site can be carried out in the same way as normal production. In addition, since the connecting members 63, 64, 73, 74 and the connecting member 8 at the connecting portions between the vertical members 61, 71 and the horizontal members 62A, 72A can be made common, the types of members to be manufactured can be significantly reduced, and it is possible to reduce manufacturing costs, improve quality, improve manufacturing efficiency, and simplify inventory management. In addition, since the member configurations at the connecting portions between the vertical members 61, 71 and the horizontal members 62A, 72A can be made common, the horizontal members 62A, 72A in each unit 6A, 7A can all be formed in the same shape and size. In addition, all the connecting members 8 extend linearly along the direction from the upstream to the downstream of the river, and the distances L between the axes of the adjacent connecting members 8 in the direction crossing the river in the capture body 3A are all equal. Therefore, the horizontal members 62A of the upstream unit 6 and the horizontal members 72A of the downstream unit 7 can all be formed in the same shape and size and made common. As a result, more members can be made common than in the above-described embodiment, the types of members to be manufactured can be further reduced, and it is possible to reduce manufacturing costs, improve quality, improve manufacturing efficiency, and simplify inventory management. Therefore, without increasing the difficulty of manufacturing the bent capture body 3A, it can be carried out in the same way as normal manufacturing, reducing the labor of manufacturing and improving quality, and suppressing the increase in manufacturing costs. In addition, since the capture body 3A is attached to the non-overflow portion 1, even if the rocks and driftwood contained in the debris flow cross over the upper ends of the upstream unit 6A and the downstream unit 7A and fall below the capture body 3A, the fallen rocks and driftwood are less likely to collide with the capture body 3A, and damage to the capture body 3A can be suppressed. In addition, since the capture body 3A is connected to the pedestal 4 embedded in the concrete constructing the non-overflow section 1, the capture body 3A is firmly fixed to the non-overflow section 1. Thereby, the impact load caused by the collision of the debris flow acting on the capture body 3A can be efficiently transmitted to the non-overflow section 1, and the resistance of the capture body 3A against punching and pulling out is improved.

[0049] <Modified Example 2> Also, as shown in FIGS. 11 and 12, in the upstream unit 6 formed by bending, the flange portions 62b provided at both ends of the steel pipe 62a of the cross member 62 may have different thicknesses so that the flange surfaces (joint surfaces) can be connected at right angles to the axis of the steel pipe 62a. In this case, as shown in FIG. 12, since the thicknesses of the flange portions 62b are different depending on the connection portions with the connecting members 63 and 64, although the lengths of the bolts B used for connection are different, the steel pipe 62a of the cross member 62 can be abutted against the flange surface of the flange portion 62b at a right angle and attached by welding or the like, so that the assembly work of the capture body 3 can be facilitated. Note that, not limited to the flange portion 62b of the cross member 62, the joint surfaces of the flange portions 63b and 64b of the connecting members 63 and 64 may have different thicknesses so as to be at right angles to the axis of the steel pipe 62a. Of course, the same configuration can be applied to the downstream unit 7.

[0050] Also, as shown in FIG. 13, in the upstream unit 6 formed by bending, the cross member 62 and the connecting members may be connected by sandwiching spacers S having different thicknesses between the flange portions 62b provided at both ends of the steel pipe 62a of the cross member 62 and the flange portions 63b and 64b of the connecting members 63 and 64. The spacer S is formed so as to have different thicknesses depending on the part, and the inclination angle of the inclined surface Sa formed at one end of the spacer S is the angle formed by the axes of the cross member 62 and the connecting members 63 and 64. The spacer S is formed with bolt insertion holes h communicating from one end to the other end. As described above, by connecting the cross member 62 and the connecting members 63 and 64 using the spacer S, the flange portions 62b of the cross member 62 and the flange portions 63b and 64b of the connecting members 63 and 64 can use normal flange portions. Therefore, only by preparing the spacer S, no special design or processing is required for other constituent members.

[0051] <Others> Although the preferred embodiments of the present invention have been described, the present invention is not limited to the above embodiments, and includes all aspects included in the concept and scope of claims of the present invention. Also, each configuration may be appropriately and selectively combined so as to achieve at least a part of the above-described problems and effects. For example, the shape, material, arrangement, size, etc. of each constituent element in the above embodiments may be appropriately changed according to the specific usage mode of the present invention. For example, although the case where the capture body 3 is provided on the dam 100 called a high dam has been described, it may be provided on a dam that is not a high dam.

Explanation of reference numerals

[0052] 1 Non-overflow part 2 Opening 21 Foundation 3, 3A Capture body 4 Gantry 41 Vertical part 42 Horizontal part 43 Connecting part 6, 6A Upstream unit 61 Vertical member 62 Cross member 62a Steel pipe 62b Flange part 63 First connecting member 63a Steel pipe 63b Flange part 64 Second connecting member 64a Steel pipe 64b Flange part 7, 7A Downstream unit 71 Vertical member 72 Cross member 72a Steel pipe 72b Flange part 73 First connecting member 73a Steel pipe 73b Flange portion 74 Second connecting member 74a Steel pipe 74b Flange portion 8 Connecting member 81 First connecting member 82 Second connecting member 100, 200 Dams S Spacer

Claims

1. A capturing body that allows flowing water flowing from the upstream of a river to pass through and captures objects contained in the flowing water, An upstream unit provided on the upstream side of the river, in which vertical members and horizontal members are connected via connecting members, A downstream unit provided on the downstream side of the river, in which vertical members and horizontal members are connected via connecting members, A connecting member that connects the upstream unit and the downstream unit, and is provided with, Each end of the upstream unit and the downstream unit is attached to a non-overflow portion constructed on both sides in the direction crossing the river in the capturing body, At least one of the upstream unit and the downstream unit is formed by being bent so as to protrude toward the upstream side of the river, The vertical member, the connecting member, the vertical member and the connecting member, and the connecting member and the connecting member in the bent unit are connected such that their axes are perpendicular to each other. A capturing body characterized by that.

2. The capturing body according to claim 1, characterized in that both the upstream unit and the downstream unit are formed by being bent so as to protrude toward the upstream side of the river.

3. The connecting member extends linearly, The capturing body according to claim 1 or 2, characterized in that all the angles formed by the axes of the connecting members adjacent to each other in the direction crossing the river in the capturing body are equal.

4. A first connecting member that connects one adjacent horizontal member and a second connecting member that connects the other adjacent horizontal member are connected to the vertical member of each unit, The capturing body according to claim 1 or 2, characterized in that the axis of the first connecting member and the axis of the second connecting member are on the same straight line.

5. The capturing body according to claim 4, characterized in that the first connecting member and the second connecting member in each vertical member are all formed in the same size.

6. The capturing body according to claim 4, characterized in that a plurality of the first connecting members and the second connecting members are provided on one vertical member.

7. In the bent unit, the horizontal members whose both ends are connected to the connecting members are all formed in the same size. The capturing body according to claim 1 or 2, characterized by that.

8. The connecting member has a first connecting member whose one end is connected to the upstream unit and a second connecting member whose one end is connected to the downstream unit, The capturing body according to claim 1 or 2, characterized in that the first connecting member and the second connecting member are all formed in the same size.

9. All connecting members extend linearly along the direction from the upstream to the downstream of the river, The capture body according to claim 1 or 2, characterized in that the distances between the axes of the connecting members adjacent to each other in the direction crossing the river in the capture body are all equal.

10. Both the upstream unit and the downstream unit are bent so as to protrude toward the upstream side of the river, The cross members whose both ends are connected to the connecting members are all formed in the same size, the capture body according to claim 9.

11. The cross member has a pipe formed linearly, and a joint provided at an end of the pipe and connected to the connecting member, The joint in the unit formed by bending is characterized in that the thickness is different so that the joint surface forms a right angle with respect to the axis of the pipe, the capture body according to claim 1 or 2.

12. The cross member has a pipe formed linearly, and a joint provided at an end of the pipe and connected to the connecting member, The connecting member has a pipe formed linearly, and a joint provided at an end of the pipe and connected to the cross member, The capture body according to claim 1 or 2, characterized in that the joint of the cross member and the joint of the connecting member in the unit formed by bending are connected via a spacer.

13. A pair of non-overflow portions protruding from both banks of the river respectively, The capture body according to any one of claims 1 to 12 provided in the opening between the pair of non-overflow portions, A weir characterized by comprising.

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