JP2020016070A - Installation method of catching body, and catching body - Google Patents

Abstract

To provide an installation method of a catching body and a catching body capable of installing simply and in a short period of time.SOLUTION: An installation method of a catching body 1 includes: a step of connecting a catching portion 3 catching a flowing object made to flow from an upstream side of a river with a heavy object 2 by a connecting member 4; a step of mounting the catching portion 3 on a river bed a; and a step of mounting the heavy object 2 on the river bed a.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a method for installing a capturing body and a capturing body.

  2. Description of the Related Art Conventionally, catchers have been installed on a riverbed in order to catch driftwood or the like flowing from an upstream of a river. As a method for installing such a capturing body, for example, a method described in Patent Document 1 is known. The installation method of the capturing body of Patent Document 1 includes an excavation step of excavating earth and sand deposited on an upstream side of an existing embankment along the extending direction of the embankment, and a concrete casting step of embedding concrete in the excavated hole. And a curing step of burying the lower end of the pillar portion forming the trapping body in the concrete until the poured concrete is solidified and curing the concrete until the concrete is solidified.

JP 2017-72020A

  In the method of installing the capturing body, the work of digging a digging hole for placing concrete and the work of laying concrete in the digging hole are required. There is a problem that it becomes longer.

  Then, this invention is made | formed based on the said subject, The objective is to provide the installation method of a capture body which can install a capture body easily and in a short period of time, and a capture body.

  The method of installing a capturing body according to the present invention, a step of connecting a capturing unit and a heavy object to capture a fluid flowing from an upstream of a river by a connecting member, and a step of mounting the capturing unit on a riverbed, Placing the heavy object on the riverbed.

  According to this configuration, the method of installing the capturing body includes a step of connecting the capturing unit that captures the fluid flowing from the upstream of the river and the heavy object by the connecting member. Therefore, since it is only necessary to place the capturing unit and the heavy object on the riverbed, it is possible to omit the work of preparing the mounting surface for mounting the capturing unit and the heavy object on the riverbed, and to easily and quickly capture the object. Body can be installed. Furthermore, even if the position of the heavy object or the capturing portion is displaced due to a change (for example, subsidence) in the riverbed due to river construction or the like, since the connecting member easily follows the displacement, the distortion caused by this displacement is suppressed. be able to. Therefore, the life of the capturing body can be extended.

  In the above configuration, the step of placing the heavy object on the riverbed includes disposing the heavy object at a position overlapping with the capturing unit or in an upstream side of the capturing unit in a direction orthogonal to the flow direction of the river. May be included.

  According to this configuration, since an external force due to collision of a fluid such as driftwood or a fluid force easily acts on the capturing unit in a direction away from the heavy object, the heavy object should be supported in a state where the capturing unit is pulled by the connecting member. Can be. Therefore, the position of the capturing unit is less likely to shift, and the installation state of the capturing unit is stabilized.

  The above configuration may include a step of connecting a second heavy object different from the heavy object and the capturing unit by a second connecting member.

  According to this configuration, since the capturing portion is supported by the second heavy object in addition to the heavy object, the capturing portion is less likely to flow even when the external force acting on the capturing portion is large. Therefore, the installation state of the capturing unit is stabilized.

  In the above configuration, a step of connecting the second capturing member to the second capturing member, which is a capturing section separate from the capturing section and captures a fluid flowing from an upstream of the river. May be included.

  According to this configuration, since the external force acting on the capturing portion and the second capturing portion is supported by the heavy object, the number of heavy objects installed is smaller than the total number of installed capturing portions and the second capturing portion. Therefore, the capturing body can be installed in a shorter time and at lower cost.

  In the above configuration, a heavy object having a coefficient of friction of 0.5 to 0.6 with the riverbed may be selected as the heavy object.

  According to this configuration, the heavy object becomes difficult to move with respect to the river bed due to the frictional force between the heavy object and the riverbed, so that the heavy object can more effectively support the external force acting on the capturing unit. Therefore, the installation state of the capturing unit is further stabilized.

  The method of installing a capturing body according to the present invention includes a step of connecting a capturing unit that captures a fluid flowing from an upstream of a river and a rug with a connecting member, and capturing the fluid flowing from an upstream of the river. Connecting the capturing unit and the rug with a connecting member, placing the capturing unit on a riverbed, placing the rug on the riverbed, and placing a heavy object on the rug. .

  According to this configuration, since the method of installing the capturing body includes connecting the capturing unit that captures the fluid flowing from the upstream of the river and the rug with the connecting member, the connecting member is connected to the heavy object. Compared with the case, a connection fitting for connecting to a hard heavy object such as a concrete block is not required. Further, in the method of installing the capturing body, since a heavy object is placed on the rug placed on the riverbed, rocks or the like at the site can be placed on the rug as a heavy object. Therefore, for example, an operation of preparing a product such as a concrete block can be omitted. Furthermore, since it is only necessary to place a heavy object on the rug placed on the riverbed, it is possible to omit the work of preparing the placement surface for placing the capturing unit and the rug on the riverbed. Therefore, the capturing body can be installed easily and in a short time as compared with the case where the heavy object and the connecting member are connected. Furthermore, even if the position of the catching part or the rug is shifted due to a change in the riverbed due to river construction (for example, subsidence), the connecting member can easily follow the shift, so that the distortion caused by this shift is suppressed. Can be. Therefore, the life of the capturing body can be extended.

  In the above configuration, the step of placing the rug on the riverbed may include disposing the rug on a position overlapping with the capturing unit or in an upstream side of the capturing unit in a direction orthogonal to a flow direction of the river. Good.

  According to this configuration, since an external force due to collision of a fluid such as driftwood or a fluid force easily acts on the capturing unit in a direction away from the heavy object, the heavy object should be supported in a state where the capturing unit is pulled by the connecting member. Can be. Therefore, the position of the capturing unit is less likely to shift, and the installation state of the capturing unit is stabilized.

  In the above configuration, a step of connecting a second rug different from the rug and the capturing unit with a second connecting member, a step of placing the second rug on the riverbed, and a step of placing the second rug on the riverbed. Placing a second heavy object different from the heavy object on the second rug.

  According to this configuration, since the capturing portion is supported by the second heavy object in addition to the heavy object, the capturing portion is less likely to flow even when the external force acting on the capturing portion is large. Therefore, the installation state of the capturing unit is stabilized.

  In the above configuration, a step of connecting the second capturing member and the rug with a second capturing member, which is a capturing portion different from the capturing portion and captures a fluid flowing from an upstream of the river. May be included.

  According to this configuration, since the external force acting on the capturing unit and the second capturing unit is supported by the heavy object, the number of installation of the heavy object is smaller than the number of installation of the capturing unit and the second capturing unit. Few. Therefore, the capturing body can be installed in a shorter time and at lower cost.

  In the above configuration, the rug may have a coefficient of friction with the riverbed of 0.5 to 0.6.

  According to this configuration, the rug becomes difficult to move with respect to the riverbed due to the frictional force between the rug and the riverbed, so that the heavy object can more effectively support the external force acting on the capturing unit. Therefore, the installation state of the capturing unit is further stabilized.

  The method of installing a capturing body according to the present invention, a step of connecting a capturing unit and a rug for capturing a fluid flowing from an upstream of a river by a connecting member, and a step of placing the capturing unit on a riverbed, Burying at least a portion of the rug in the riverbed.

  According to this configuration, since the method of installing the capturing body includes burying at least a part of the rug, the rug is fixed by the sediment of the riverbed. Therefore, the capturing body can be installed even if there is no large heavy object such as rock at the site. Furthermore, even if the position of the catching part or the rug is shifted due to a change in the riverbed due to river construction (for example, subsidence), the connecting member can easily follow the shift, so that the distortion caused by this shift is suppressed. Can be. Therefore, the life of the capturing body can be extended.

  In the above configuration, the step of burying at least a part of the rug in the riverbed includes disposing the rug on a position overlapping with the capturing unit or in an upstream side of the capturing unit in a direction orthogonal to a flow direction of the river. May be included.

  According to this configuration, since the external force due to collision of a fluid such as driftwood or fluid force easily acts on the capturing portion in a direction away from the rug, the rug can be supported in a state where the capturing portion is pulled by the connecting member. . Therefore, the position of the capturing unit is less likely to shift, and the installation state of the capturing unit is stabilized.

  In the above configuration, the method may include a step of connecting a second rug different from the rug and the capturing unit with a second connecting member, and a step of burying at least a part of the second rug.

  According to this configuration, since the capturing portion is supported by the second rug in addition to the rug, even if the external force acting on the capturing portion is large, the capturing portion is less likely to flow. Therefore, the installation state of the capturing unit is stabilized.

  In the above configuration, a step of connecting the second capturing member and the rug with a second capturing member, which is a capturing portion different from the capturing portion and captures a fluid flowing from an upstream of the river. May be included.

  According to this configuration, since the external force acting on the capturing portion and the second capturing portion is supported by the rug, the number of rugs installed is smaller than the number of installed rugs combined with the capturing portion and the second capturing portion. Therefore, the capturing body can be installed in a shorter time and at lower cost.

  In the above configuration, the rug may be formed of rubber, a wire net, a chain woven in a net shape, or geotextile.

  According to this configuration, the rug can be formed in a short period of time because the rug is formed of generally available rubber, wire mesh, a chain woven in a net, or geotextile. For this reason, the capturing body can be installed more easily and in a shorter time, so that it becomes easier to cope particularly when the installation of the capturing body is urgently required in a flood or the like.

  In the above configuration, the connecting member may be a chain, a wire, or a rope.

  According to this configuration, since the connecting member is easily bent, it becomes easier to follow the displacement of the position of the heavy object, the capturing portion or the rug, and the distortion caused by this displacement can be further suppressed. .

  A capturing body according to the present invention is a heavy object placed on a riverbed, a capturing part having a plurality of pillar portions rising from the base portion and the base portion placed in a state lying on the riverbed, and the heavy object. And a connecting member connecting the capturing portion.

  According to this configuration, since the capturing body includes the connecting member that connects the heavy object and the capturing unit, the capturing unit can be installed simply by placing the capturing unit and the heavy object on the riverbed. Therefore, it is possible to omit the work of preparing the mounting surface for mounting the capturing unit and the heavy object on the riverbed, and it is possible to easily and quickly install the capturing body. Furthermore, even if the position of the heavy object or the capturing portion is displaced due to a change (for example, subsidence) in the riverbed due to river construction or the like, since the connecting member easily follows the displacement, the distortion caused by this displacement is suppressed. be able to. Therefore, the life of the capturing body can be extended.

  A capturing body according to the present invention is a rug, a capturing portion having a base portion placed in a state of lying on a riverbed and a plurality of pillar portions rising from the base portion, and a connecting member connecting the rug and the capturing portion. And.

  According to this configuration, since the capturing body includes the connecting member that connects the rug and the capturing unit, the capturing unit and the rug are placed on the riverbed, and a heavy object such as rock at the site is placed on the rug. Or simply bury the rug in the riverbed. Therefore, when placing a heavy object on the rug, it is possible to omit the work of preparing the capturing unit and the mounting surface for placing the rug on the riverbed, so that the capturing body can be easily and quickly installed. it can. On the other hand, when the rug is buried in the riverbed, the rug is fixed by the soil of the riverbed. Therefore, the capturing body can be installed even if there is no large heavy object such as rock at the site. Furthermore, even if the position of the catching part or the rug is shifted due to a change in the riverbed due to river construction (for example, subsidence), the connecting member can easily follow the shift, so that the distortion caused by this shift is suppressed. Can be. Therefore, the life of the capturing body can be extended.

  ADVANTAGE OF THE INVENTION According to this invention, the installation method of a capture body and the capture body which can install a capture body easily and in a short period of time can be provided.

It is a top view of a capture object concerning a 1st embodiment of the present invention. It is a side view of a capture object concerning a 1st embodiment of the present invention. It is a top view of a capture object concerning a modification of a 1st embodiment of the present invention. FIG. 9 is another plan view of a capturing body according to a modification of the first embodiment of the present invention. FIG. 9 is another plan view of a capturing body according to a modification of the first embodiment of the present invention. It is a top view of a capture object of a 2nd embodiment of the present invention. It is a top view showing the installation state of the capture object of a 2nd embodiment of the present invention. It is a side view which shows the installation state of the capturing body of 2nd Embodiment of this invention. It is a top view of a capture object concerning a modification of a 2nd embodiment of the present invention. FIG. 13 is another plan view of a capturing body according to a modification of the second embodiment of the present invention. It is a side view showing the installation state of the capture object concerning a 3rd embodiment of the present invention. It is a top view of a capture object concerning a modification of a 3rd embodiment of the present invention. FIG. 14 is another plan view of a capturing body according to a modification of the third embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, each drawing referred to below is a simplified illustration of main components necessary for explaining the capturing body 1 according to the embodiment of the present invention for convenience of explanation. Therefore, the capturing body 1 according to each embodiment of the present invention may include any components not shown in the drawings referred to in this specification.

(1st Embodiment)
Hereinafter, the capturing body 1 of the first embodiment will be described with reference to FIGS. The capturing body 1 is disposed in a river, and captures a fluid such as driftwood or debris flowing from an upstream of the river. The capturing body 1 includes a heavy object 2 mounted on a river bed a of a river, a capturing unit 3 mounted on the river bed a of the river, and capturing a fluid flowing from an upstream of the river, and a heavy object 2. And a connecting member 4 connecting the capturing section 3. In each plan view, the upper side is upstream and the lower side is downstream.

  The heavy object 2 is constituted by a concrete block. In the present embodiment, the weight 2 is formed in a rectangular parallelepiped shape having a square shape in plan view, but the shape is not particularly limited. The weight 2 has a connection fitting 5 attached to a side wall thereof and connected to the connection member 4. In the example of FIG. 1, four connecting fittings 5 are provided on the concrete block, but the number of connecting fittings 5 is not limited. The heavy object 2 is not limited to a concrete block, but is placed on a riverbed a when an external force (for example, a collision of a fluid such as driftwood or a fluid force such as a debris flow) is applied to the capturing unit 3. Any external force can be used as long as it can support the external force) and can connect the connecting member 4.

  The capturing unit 3 includes a base 6 placed on the river bed a of the river, a plurality of pillars 7 rising from the base 6, a horizontal beam member 12 connecting the pillars 7, and a pillar 7. And a resistance portion 8 extending from the base portion 6 to the opposite side of the pillar portion 7 and buried in the riverbed a.

  The base portion 6 includes a pair of base members 9 extending in parallel at a predetermined interval, and a pair of connection base members 10 connected to ends of the pair of base members 9 to connect the base members 9 to each other. And are formed in a substantially rectangular frame shape as a whole. In each embodiment, the direction in which the base material 9 is separated is defined as the width direction of the base portion 6.

  The pair of base materials 9 are formed by connecting steel pipes. Specifically, a flange portion 11 is formed at a terminal portion of the steel pipe, and the flange portion 11 is connected by fastening the flange portion 11 with a bolt or the like, but is not limited thereto. Each base substrate 9 may be constituted by one steel pipe. Each connection base material 10 is constituted by a steel pipe. Each connection base material 10 is connected by welding to the pair of base materials 9 in a posture substantially orthogonal to the direction in which the pair of base materials 9 extend.

  The plurality of pillars 7 are connected to the substantially central portions of the pair of base materials 9 so as to rise substantially at right angles, and catch the fluid by collision of fluid such as driftwood flowing from the upstream of the river. Things. In the present embodiment, two pillars 7 are connected to a pair of base materials 9. Each pillar 7 is formed by connecting steel pipes. In the example of FIG. 2, each column 7 is formed by fastening two steel pipes having the flange 14 with bolts or the like at the flange 14, but the present invention is not limited to this. Each pillar 7 may be constituted by one steel pipe.

  The horizontal rail member 12 is configured by a steel pipe extending in the width direction of the base portion 6. The horizontal rail member 12 is connected to the column part 7 by welding both ends of the horizontal rail member 12 to the column part 7 in a posture orthogonal to the direction in which the column part 7 extends. In the example of FIG. 2, three horizontal rail members 12 are provided at predetermined intervals in the direction in which the pillar portions 7 extend, but the number is not limited. Further, the horizontal rail member 12 may be omitted.

  The support portion 13 has one end on a surface opposite to the weight portion 2 at the upper end of the column portion 7 or a surface opposite to the weight portion 2 at an intermediate portion between the upper end and the lower end of the column portion 7. In addition to being connected, the other end is connected to a position away from the column 7 in the base substrate 9 in a direction opposite to the weight portion 2, thereby supporting the column 7 so as not to fall. In the present embodiment, two support portions 13 are provided to support each column 7. In the example of FIGS. 1 and 2, each support portion 13 includes a steel pipe bent in a substantially L shape and a steel pipe extending in a direction inclined toward the column 7 with respect to the base material 9. 15 are connected by bolts or the like in a state where they are attached to each other. Each of the support portions 13 is connected by welding one end to the column portion 7 and connected by welding the other end to the base member 9. In addition, each support part 13 may be comprised by one steel pipe. Further, each support portion 13 may be omitted.

  The resistance portion 8 is connected to the base member 9 so as to extend in a substantially central portion of the base member 9 on a side opposite to the column portion 7, and extends from the leg portion 18 in the width direction of the base portion 6. And a crosspiece member 16. The resistance part 8 suppresses the movement of the base part 6 placed on the riverbed a in the flowing direction of the river water by being buried in the riverbed a. For example, when a fluid such as driftwood flowing from the upstream of the river collides with the column 7, and the base portion 6 receives a force in the flowing direction of the river water through the column 7, the resistance portion 8 becomes Since the resistance is generated in the riverbed a, the movement of the base portion 6 can be suppressed.

  The leg portion 18 is connected to the base member 9 by welding in a posture orthogonal to the direction in which the base member 9 extends. In the present embodiment, two legs 18 are provided on each base substrate 9 at intervals in the direction in which the base substrate 9 extends (see FIG. 2), but the number of the legs 18 is not limited thereto. Never. The legs 18 may be omitted. The horizontal rail member 16 is connected to a pair of leg portions 18 facing each other in the width direction of the base portion 6. Note that the horizontal rail member 16 may be omitted. When the leg 18 is omitted, the horizontal rail member 16 is omitted together with the leg 18.

  The connecting member 4 is formed of a member that is easily bent such as a chain. The connecting member 4 may be, for example, a wire or a rope as long as it is easily bent and can be connected to the capturing portion 3 and the heavy object 2.

  One end of the connecting member 4 is wound around the connecting base 10 opposite to the supporting portion 13 with respect to the column portion 7 of the capturing portion 3 and is fixed in this state. The other end of the connecting member 4 is fixed to the heavy object 2 by being hooked on a connection fitting 5 attached to a side wall of the heavy object 2. In this embodiment, four connecting members 4 are provided at regular intervals in the width direction of the base portion 6, but the number of the connecting members 4 is not limited.

  An installation method of the capturing body 1 according to the first embodiment configured as described above will be described.

  First, a preparation step of preparing the heavy object 2 and preparing the capturing unit 3 is performed. In the preparation process, the operator selects, as the heavy object 2, a heavy object having a friction coefficient of 0.5 to 0.6 with the riverbed a. In the present embodiment, a concrete block having a coefficient of friction with the riverbed a of 0.5 to 0.6 is selected. Next, the worker attaches the connection fitting 5 to the side wall of the concrete block as the heavy load 2. In this embodiment, the worker attaches the four connection fittings 5 to the side wall of the concrete block at regular intervals.

  Next, a connection step of connecting the capturing portion 3 and the heavy object 2 by the connection member 4 is performed. In the present embodiment, as shown in FIGS. 1 and 2, connection is performed using four connection members 4. Specifically, first, the worker winds one end of the connecting member 4 around the connecting base 10 opposite to the supporting portion 13 with respect to the pillar portion 7 of the capturing portion 3, and in this state, connects the connecting member 4. Is hooked on the connecting member 4. Thereby, the connecting member 4 is connected to the capturing unit 3. Next, the worker connects the connecting member 4 to the heavy object 2 by hooking the other end of the connecting member 4 to the connecting fitting 5 attached to the side wall of the concrete block as the heavy object 2. In the present embodiment, the connection between the capturing portion 3 and the heavy object 2 by the connecting member 4 is performed at four locations at a predetermined interval in the width direction of the base portion 6.

  When the connecting step is completed, the capturing unit mounting step of mounting the capturing unit 3 on the riverbed a and the heavy object mounting step of mounting the heavy object 2 on the riverbed a are performed simultaneously. In the heavy load placing step, the heavy load 2 is placed upstream of the capturing section 3 (see FIG. 1). When placing the capturing unit 3 on the riverbed a, the operator simply fills the resistance unit 8 of the capturing unit 3 with earth and sand by manual operation or the like. When the resistance section 8 is omitted, the operation of filling the resistance section 8 with earth and sand is omitted. Further, the heavy object 2 may not only be placed on the riverbed a, but may be partially buried in the riverbed a (see FIG. 2). In addition, when placing the capturing unit 3 and the heavy object 2 on the riverbed a, the worker simply levels the riverbed a so that the capturing unit 3 and the heavy object 2 can be easily placed on the riverbed a. Is also good.

  Note that the heavy object placing step may be performed before performing the connecting step. In this case, the operator first places the heavy object 2 on the riverbed a (the above-mentioned heavy object placing step), and then places the capturing unit 3 on the riverbed a (the capturing unit placing step). After that, the connecting member 4 is connected to the capturing portion 3 and also to the heavy object 2 (the above connecting step). Further, in this case, the capturing portion placing step may be performed before performing the heavy load placing step.

  According to the installation method of the capturing body 1, in the connecting step, the capturing unit 3 and the heavy object 2 are connected by the connecting member 4, so that the capturing unit 3 and the heavy object 2 are placed on the riverbed a. It only needs to. Therefore, the work of preparing the mounting surface for mounting the capturing unit 3 and the heavy object 2 on the riverbed a can be omitted or simplified, so that the capturing body can be installed easily and in a short time. Furthermore, even if the position of the heavy object 2 or the capturing portion 3 is shifted due to a change (for example, subsidence) of the riverbed a due to river construction or the like, the connecting member 4 can easily follow the shift, and the shift occurs. Distortion can be suppressed. Therefore, the life of the capturing body 1 can be extended.

  According to the installation method of the capturing body 1, in the heavy-loading step, the heavy object 2 is mounted on the upstream side of the capturing unit 3, so that an external force due to collision of a fluid such as driftwood or fluid force is generated. Since it becomes easier to act on the capturing unit 3 in a direction away from the heavy object 2, the heavy object 2 can be supported in a state where the capturing unit 3 is pulled by the connecting member 4. Therefore, the position of the capturing unit 3 is less likely to shift, and the installation state of the capturing unit 3 is stabilized.

  According to the installation method of the capturing body 1, since a heavy object having a friction coefficient of 0.5 to 0.6 with respect to the riverbed a is selected as the heavy object 2, the heavy object 2 and the riverbed a are connected to each other. The heavy load 2 is hard to move with respect to the riverbed a due to the frictional force therebetween. Therefore, the weight 2 can effectively support the external force acting on the capturing unit 3, and the installation state of the capturing unit 3 is stabilized.

  According to the installation method of the capturing body 1, since the connecting member 4 is formed of a chain, it is easily bent. Therefore, it is easy to follow the displacement of the position of the heavy object 2 or the capturing portion 3, and the distortion caused by the displacement can be effectively suppressed.

  The installation method of the capturing body 1 of the first embodiment described above is an embodiment of the present invention, and the specific configuration can be appropriately changed without departing from the spirit of the present invention. Hereinafter, a modification of the first embodiment will be described.

  In the method for installing the capturing body 1 according to the first embodiment, in the heavy-loading step, the heavy load 2 is placed on the upstream side of the capture unit 3, but as shown in FIG. It may be placed at a position overlapping the capturing unit 3 in a direction perpendicular to the direction.

  In the installation method of the capturing body 1 of the first embodiment, the capturing portion 3 and the heavy object 2 are connected by the connecting member 4 in the connecting step, but as shown in FIG. The second weight 21 and the capturing unit 3 may be further connected by the second connecting member 22. The second weight 21 has the same configuration as the weight 2. The second connecting member 22 has the same configuration as the connecting member 4. In this case, the connection between the second heavy object 21 and the capturing unit 3 by the second connection member 22 is performed by the same method as the above-described connection step. The second heavy object 21 is mounted on the riverbed a by the same method as the above-described heavy object mounting step.

  With this configuration, the capturing unit 3 is supported by the second heavy object 21 in addition to the heavy object 2, so that even if the external force acting on the capturing unit 3 is large, the capturing unit 3 is difficult to flow. Therefore, the installation state of the capturing unit 3 is stabilized. The method for installing the capturing body of this modification is particularly preferable when the fluid force of the river is large.

  In the installation method of the capturing body 1 according to the first embodiment, the capturing portion 3 and the heavy object 2 are connected by the connecting member 4 in the connecting step, but as shown in FIG. The second capturing member 22 may further connect the second capturing member 23 to the second capturing member 23, which is a capturing unit and captures the fluid flowing from the upstream of the river. The second capturing unit 23 has the same configuration as the capturing unit 3 described above. In this case, the connection between the second capturing portion 23 and the heavy object 2 by the second connecting member 22 is performed by a method similar to the above-described connecting step. The second capturing unit 23 is mounted on the riverbed a by the same method as the capturing unit mounting step.

  In this case, since the external force acting on the capturing section 3 and the second capturing section 23 is supported by the heavy object 2, the weight of the heavy article 2 is larger than the total number of the capturing sections 3 and the second capturing section 23. 2. The number of installations is small. Therefore, the capturing body can be installed in a shorter time and at lower cost. The method for installing the capturing body of this modification is particularly preferable when the fluid force of the river is small.

(2nd Embodiment)
Next, a capturing body 31 according to a second embodiment will be described. As shown in FIG. 6, the capturing body 31 of the second embodiment has a rug 32, the connecting member 4 is connected to the rug 32 instead of the heavy material 2, and the heavy material 2 is omitted. , Is different from the capturing body 1 of the first embodiment. Elements corresponding to the capturing body 1 of the first embodiment are denoted by the same reference numerals as in the first embodiment, and description thereof will be omitted.

  The rug 32 is formed of a wire net formed in a rectangular shape, and the heavy object 2 is placed thereon. The connection member 4 is connected to the rug 32 by hooking the other end of the connection member 4 to the edge of the rug 32. In the present embodiment, the four connecting members 4 are connected to the rug 32 at regular intervals in the width direction of the base 6 of the capturing unit 3, but the number of connecting members 4 is not limited. Note that the rug 32 is not limited to a wire mesh, and is capable of placing the heavy object 2 thereon, as long as the connecting member 4 can be connected thereto, for example, rubber, a chain woven in a net shape, or the like. It may be formed by geotextile.

  Next, a method of installing the capturing body 31 according to the second embodiment configured as described above will be described. The method of installing the capturing body 31 according to the second embodiment differs from the first embodiment in that, in the above-described preparation step, the operation of preparing the rug 32 is performed instead of the operation of preparing the heavy object 2 being omitted. ing. Furthermore, the method of installing the capturing body 31 of the second embodiment is different from that of the first embodiment in that a rug heavy load placing step is performed instead of the heavy load placing step. The description of the same parts as those in the method of installing the capturing body 1 of the first embodiment is omitted.

  First, the worker performs an operation of preparing the rug 32 in the preparation process. At this time, the worker selects a rug 32 having a friction coefficient of 0.5 to 0.6 with the riverbed a. In the present embodiment, as the rug 32, a wire mesh having a friction coefficient of 0.5 to 0.6 with the riverbed a is selected.

  When the preparation step is completed, a connection step of connecting the capturing unit 3 and the rug 32 with the connection member 4 is performed. Specifically, the worker connects the connecting member 4 to the rug 32 by hooking the other end of the connecting member 4 to the edge of the rug 32. In the present embodiment, four connecting members 4 are connected to the rug 32. Note that the method of connecting the connecting member 4 and the capturing portion 3 by the connecting member 4 is the same as in the first embodiment, and a description thereof is omitted.

  When the connecting step is completed, a capturing section placing step of placing the capturing section 3 on the riverbed a, and a rug heavy article placing step of placing the rug 32 on the riverbed a and placing the heavy article 2 on the rug 32 And are performed simultaneously. At this time, as shown in FIG. 7, the rug 32 is placed on the upstream side of the capturing unit 3. When placing the capturing unit 3 and the rug 32 on the riverbed a, the worker may simply level the riverbed a so that the capturing unit 3 and the rug 32 can be easily placed on the riverbed a. .

  After placing the rug 32 on the riverbed a, the operator places the heavy object 2 on the rug 32. At this time, rocks and the like at the site are placed on the rug 32 as the heavy loads 2. The weight 2 may be a concrete block prepared in advance as in the first embodiment. Further, not only the heavy object 2 is placed on the rug 32, but also a part of the heavy object 2 may be buried in the riverbed a (see FIG. 8).

  In addition, a rug heavy-loading process may be performed before performing a connection process. In this case, first, the worker places the rug 32 on the riverbed a, and places the heavy object 2 on the rug 32 (the above-described rug heavy object placement step). Next, the capturing unit 3 is mounted on the riverbed a (the capturing unit mounting step). After that, the connecting member 4 is connected to the capturing unit 3 and to the rug 32. In this case, the capturing unit placing step may be performed before the rug heavy load placing step.

  According to the method of installing the capturing body 31 of the second embodiment, since the capturing section 3 and the rug 32 are connected by the connecting member 4 in the connecting step, the first connecting the connecting member 4 to the heavy object 2 is performed. Compared with the embodiment, a connection fitting 5 for connecting to a hard heavy object 2 such as a concrete block is unnecessary. Further, in the method of installing the capturing body 31 according to the second embodiment, since the heavy object 2 is placed on the rug 32 placed on the riverbed a, the rock or the like at the site is placed on the rug 32 as the heavy object 2. be able to. Therefore, for example, an operation of preparing a product such as a concrete block can be omitted. Furthermore, since it is only necessary to place the heavy object 2 on the rug 32 placed on the riverbed a, the work of preparing the placement surface for placing the capturing unit 3 and the rug 32 on the riverbed a is omitted or simplified. be able to. Therefore, compared with the first embodiment in which the heavy object 2 and the connecting member 4 are connected, the capturing body can be installed easily and in a short time. Furthermore, even if the position of the capturing portion 3 or the rug 32 is displaced due to a change (for example, subsidence) of the riverbed a due to river construction or the like, the connecting member 4 can easily follow the displacement, and thus the distortion generated due to this displacement. Can be suppressed. Therefore, the life of the capturing body can be extended.

  According to the method of installing the capturing body 31 of the second embodiment, the rug 32 is placed on the upstream side of the capturing unit 3 in the rug heavy load placing step, so that collision or flow of a fluid such as driftwood occurs. External force due to physical force easily acts on the capturing portion 3 in a direction away from the heavy object 2. Therefore, since the heavy object 2 can be supported in a state where the capturing unit 3 is pulled by the connecting member 4, the position of the capturing unit 3 is hardly shifted, and the installation state of the capturing unit 3 is stabilized.

  According to the installation method of the capturing body 31 of the second embodiment, as the rug 32, one having a coefficient of friction between the riverbed a and 0.5 to 0.6 is selected. The rug 32 is less likely to move with respect to the riverbed a due to the frictional force between the two. For this reason, the heavy object 2 can more effectively support the external force acting on the capturing unit 3, and the installation state of the capturing unit 3 is further stabilized.

  According to the installation method of the capturing body 1, the rug 32 is formed of a generally available wire mesh, so that the rug 32 can be created in a short time, and the capturing body can be installed more easily and in a shorter time. can do. For this reason, it becomes easy to cope particularly when it becomes necessary to install a capturing body urgently in a flood or the like.

  Next, a modification of the second embodiment will be described.

  In the method for installing the capturing body 31 according to the second embodiment, in the above-described rug heavy load placing step, the rug 32 is placed on the upstream side of the capturing unit 3, but in a direction perpendicular to the flow direction of the river (FIG. 7 may be placed at a position overlapping the capturing unit 3 in the left-right direction.

  In the installation method of the capturing body 31 of the second embodiment, the capturing portion 3 and the rug 32 are connected by the connecting member 4 in the connecting step, but as shown in FIG. A step of connecting the second rug 33 and the capturing unit 3 with the second connecting member 22 may be performed. The second rug 33 has the same configuration as the rug 32. On the second rug 33, a second heavy object 21 different from the heavy object 2 is placed. In this case, the connection between the second rug 33 and the capturing unit 3 by the second connecting member 22 is performed by a method similar to the above-described connecting step. The placement of the second rug 33 on the riverbed a is performed in the same manner as in the rug heavy load placement step. The placing of the second heavy article 21 on the second rug 33 is performed by the same method as the above-mentioned rug heavy article placing step.

  With this configuration, the capturing unit 3 is supported by the second heavy object 21 in addition to the heavy object 2, so that even if the external force acting on the capturing unit 3 is large, the capturing unit 3 is difficult to flow. Therefore, the installation state of the capturing unit 3 is stabilized. The method for installing the capturing body according to this modification is particularly preferable when the fluid force of the river is large.

  In the installation method of the capturing body 31 according to the second embodiment, in the connecting step, a step of connecting the capturing unit 3 and the rug 32 with the connecting member 4 is performed. However, as shown in FIG. 3, a step of connecting the second capturing member 23 and the rug 32, which captures the fluid flowing from the upstream of the river, with the second connecting member 22, may be performed. . The connection between the second capturing portion 23 and the rug 32 by the second connecting member 22 is performed by a method similar to the above-described connecting step. The second capturing unit 23 is mounted on the riverbed a by the same method as the capturing unit mounting step.

  In this case, since the external force acting on the capturing section 3 and the second capturing section 23 is supported by the heavy object 2, the weight of the heavy article 2 is larger than the total number of the capturing sections 3 and the second capturing section 23. 2. The number of installations is small. Therefore, the capturing body can be installed in a shorter time and at lower cost. The method of installing the capturing body according to this modification is particularly preferable when the fluid force of the river is small.

(Third embodiment)
Next, a method of installing the capturing body 31 according to the third embodiment will be described. The method of installing the capturing body 31 of the third embodiment is the same as that of the second embodiment in that the capturing body 31 of the second embodiment shown in FIG. 6 is used. As shown in FIG. 11, the second embodiment is different from the second embodiment in that an embedding step of embedding a rug 32 in a riverbed a is performed. Portions corresponding to the second embodiment are denoted by the same reference numerals as in the second embodiment, and description thereof is omitted.

  In the method of installing the capturing body 31 according to the third embodiment, first, a preparation step, a coupling step, and a capturing unit mounting step similar to those in the second embodiment are performed.

  Next, the worker performs an embedding process of embedding the rug 32 on the riverbed a. In the embedding step, the rug 32 is buried at a position upstream of the capturing unit 3 (in FIG. 11, the right is upstream and the left is downstream). At this time, the worker excavates a portion where the rug 32 is to be buried in the riverbed a, and completely fills the rug 32 with the soil of the riverbed a in this excavated portion. As a result, the rug 32 is in a state where the earth and sand are accumulated, and is fixed by the earth and sand on the riverbed a.

  Note that a part of the rug 32 may be exposed from the riverbed a with the rug 32 buried in the riverbed. In this case, the connecting step may be performed after the burying step is performed. That is, first, the worker embeds the rug 32 in the riverbed a (the embedding step), and then places the capturing unit 3 on the riverbed a (the capturing unit mounting step). Then, after that, the worker connects the connecting member 4 to the capturing unit 3 and also connects to the portion of the rug 32 that is exposed from the riverbed a. In this case, the capturing unit placing step may be performed before performing the embedding step.

  According to the installation method of the capturing body 31 of the third embodiment, the rug 32 is buried in the riverbed a, and thus is fixed by the earth and sand of the riverbed a. Therefore, the capturing body 31 can be installed even if there is no large heavy object 2 such as a rock at the site. Furthermore, even if the position of the capturing portion 3 or the rug 32 is displaced due to a change (for example, subsidence) of the riverbed a due to river construction or the like, the connecting member 4 can easily follow the displacement, and thus the distortion generated due to this displacement. Can be suppressed. Therefore, the life of the capturing body 31 can be extended.

  According to the method of installing the capturing body 31 of the third embodiment, the rug 32 is buried in the riverbed a at a position upstream of the capturing part 3 in the burying step. Therefore, an external force due to collision of a fluid such as driftwood or a fluid force easily acts on the capturing unit 3 in a direction away from the rug 32, so that the rug 32 can support the capturing unit 3 while being pulled by the connecting member 4. it can. Therefore, the position of the capturing unit 3 is less likely to shift, and the installation state of the capturing unit 3 is stabilized.

  Next, a modification of the third embodiment will be described.

  In the method for installing a capturing body according to the third embodiment, the rug 32 is buried upstream of the capturing unit 3 in the burying step, but in a direction orthogonal to the flow direction of the river (the left-right direction in FIG. 11). It may be buried in a position overlapping with the capturing unit 3.

  In the installation method of the capturing body 31 according to the third embodiment, the capturing portion 3 and the rug 32 are connected by the connecting member 4 in the connecting step, but as shown in FIG. The second rug 33 and the capturing section 3 may be connected by the second connecting member 22. In this case, the second rug 33 is buried in the riverbed a by the same method as the rug 32 in the embedding step.

  In this case, since the capturing portion 3 is supported by the second rug 33 in addition to the rug 32, the capturing portion 3 is less likely to flow even when the external force acting on the capturing portion 3 is large. Therefore, the installation state of the capturing unit 3 is stabilized. The method for installing the capturing body according to this modification is particularly preferable when the fluid force of the river is large.

  In the installation method of the capturing body of the third embodiment, the capturing unit 3 and the rug 32 are connected by the connecting member 4 in the connecting step, but as shown in FIG. However, the second capturing member 23 that captures the fluid flowing from the upstream of the river and the rug 32 may be further connected by the second connecting member 22. In this case, the second capturing unit 23 is mounted on the riverbed a by the same method as the capturing unit 3 in the capturing unit mounting step.

  In this case, since the external force acting on the capturing section 3 and the second capturing section 23 is supported by the rug 32, the number of the rugs 32 is larger than the number of the capturing sections 3 and the second capturing section 23. The number of installations is small. Therefore, the capturing body can be installed in a shorter time and at lower cost. The method of installing the capturing body according to this modification is particularly preferable when the fluid force of the river is small.

DESCRIPTION OF SYMBOLS 1 Capture body 2 Heavy object 3 Capture part 4 Connecting member 21 Second heavy object 22 Second connecting member 23 Second capturing part 32 Rug 33 Second rug a Riverbed

Claims (18)

A step of connecting a capturing part for capturing a fluid flowing from the upstream of the river and a heavy object by a connecting member, a step of mounting the capturing part on a riverbed, and a step of mounting the heavy substance on a riverbed And a method of installing a capturing body. The step of placing the heavy object on the riverbed includes arranging the heavy object at a position overlapping with the capturing part or in an upstream side of the capturing part in a direction orthogonal to a flow direction of the river. The method for installing the capturing body according to the above. The method for installing a capturing body according to claim 1, further comprising a step of connecting a second heavy object different from the heavy object and the capturing unit by a second connecting member. The capturing section, which is separate from the capturing section, includes a step of connecting a second capturing section that captures a fluid flowing from an upstream of the river and the heavy object by a second connecting member. 3. The method for installing a capturing body according to 1 or 2. The method for installing a capturing body according to any one of claims 1 to 4, wherein a heavy object having a coefficient of friction with the riverbed of 0.5 to 0.6 is selected as the heavy object. A step of connecting a catching part and a rug for catching the fluid flowing from the upstream of the river with a connecting member, a step of placing the catching part on the riverbed, placing the rug on the riverbed, and placing the rug on the riverbed; Placing a heavy object on the trapping body. The step of placing the rug on the riverbed includes arranging the rug in a position overlapping with the capturing unit or in an upstream side of the capturing unit in a direction orthogonal to the flow direction of the river. How to install the capturing body. A step of connecting the second rug different from the rug and the capturing unit by a second connecting member;
Placing the second rug on the riverbed;
The method according to claim 6, further comprising: placing a second heavy object different from the heavy object on the second rug placed on the riverbed. 7. A step of connecting a second catching unit, which is a catching unit different from the catching unit, which catches a fluid flowing from an upstream of the river with the rug, by a second connecting member. Or the installation method of the capturing body of 7. The method of installing a capturing body according to any one of claims 6 to 9, wherein the rug is selected to have a coefficient of friction with the riverbed of 0.5 to 0.6. A step of connecting a catching part and a rug for capturing a fluid flowing from an upstream of a river by a connecting member, a step of placing the catching part on a riverbed, and embedding at least a part of the rug in the riverbed. And a method of installing a capturing body. The step of burying at least a part of the rug in the riverbed includes arranging the rug at a position overlapping with the capturing unit or in an upstream side of the capturing unit in a direction orthogonal to a flow direction of the river. The method for installing the capturing body according to the above. A step of connecting the second rug different from the rug and the capturing unit by a second connecting member;
The method according to claim 11, further comprising: burying at least a part of the second rug. 12. A capturing section separate from the capturing section, the method including a step of connecting a second capturing section for capturing a fluid flowing from an upstream of the river to the rug by a second connecting member. Or the installation method of the capturing body according to 12. The installation method of the capturing body according to any one of claims 6 to 14, wherein the rug is formed of rubber, a wire net, a chain woven in a net shape, or a geotextile. The installation method of the capturing body according to any one of claims 1 to 15, wherein the connection member is one of a chain, a wire, and a rope. Heavy objects placed on the riverbed,
A capturing portion having a base portion placed in a state lying on the riverbed and a plurality of pillar portions rising from the base portion;
A capturing body comprising: a connecting member that connects the heavy object and the capturing unit. A rug and a capturing portion having a base portion placed on the riverbed and a plurality of pillar portions rising from the base portion;
A capturing body comprising: a connecting member that connects the rug and the capturing unit.

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