How to install the set jig and base plate

Abstract

To facilitate fitting of a base plate to a support pillar constituting a capturing body.SOLUTION: A setting fixture 1 used for laying a support pillar erected in a capturing body installed in a dam so as to tilt in a flowing direction F of a river and fitting a base plate to the support pilar comprises: a pair of fitting parts 10 provided with the same interval 10D as that between at least two holes formed with equal intervals in the base plate in a peripheral direction; a connection part 20 that connects the fitting parts 10 to each other at one ends 10a with the interval 10D; and a level vial 30 provided in the connection part 20. The fitting parts 10 have bolts 11 inserted into the two holes at the other ends 10b. The level vial 30 measures whether the two holes are included in the same horizontal surface in a state where the bolts 11 are inserted into the two holes.SELECTED DRAWING: Figure 1A

Description

[Technical Field]

[0001] The present invention relates to a setting jig and a method for attaching a base plate, and in particular to a setting jig used to lay a support pillar that is erected at an angle to the direction of river flow of a capture body installed on a dam and attach a base plate to the support pillar, and a method for attaching a base plate using the setting jig. [Background technology]

[0002] As a measure against debris flows in rivers, sabo dams equipped with trapping bodies that capture debris, rocks, driftwood, etc. flowing from upstream are known. For example, a permeable sabo dam has a pair of sleeves that protrude from both sides of the river, with an opening between the sleeves to allow water to flow.

[0003] The trap is installed in the opening and traps debris, stones, driftwood, etc. while allowing sediment and water to pass through. The trap is arranged in a grid pattern on the upstream side using supports and beams, and traps debris, stones, driftwood, etc. in the grid squares. The trap has an upstream support made of steel pipe on the side facing upstream in the direction of river flow, and a downstream support made of steel pipe on the side facing downstream. Base plates are attached to the lower ends of the upstream and downstream supports and are embedded in a concrete foundation (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2017-040081 Summary of the Invention [Problem to be solved by the invention]

[0005] Fig. 4A is a perspective view showing a permeable sabo dam 100 equipped with a trapping body 200. Fig. 4B is a side view of the trapping body 200 shown in Fig. 4A. The support pillars 210 equipped to the trapping body 200 are formed of circular or nearly circular steel pipes. The support pillars include an upstream support pillar 210 erected on the upstream side and a downstream support pillar 220 erected on the downstream side. The upstream support pillar 210 and the downstream support pillar 220 are connected to each other.

[0006] For example, in the trap 200, five upstream support pillars 210 and three downstream support pillars 220 are erected on a concrete foundation 300 at predetermined intervals along the extension direction W of the sabo dam 100. The upstream support pillars 210 extend obliquely from the upstream side to the downstream side. The downstream support pillars 220 extend obliquely from the downstream side to the upstream side. The downstream support pillars 220 are connected to the upper ends of the upstream support pillars 210.

[0007] Meanwhile, on the side of the concrete foundation 300, the support posts 210, 220 of the capture body are firmly fixed to the concrete foundation 300 via, for example, anchor bolts 400. The locations where the anchor bolts 400 of the capture body 200 will be installed are marked out in advance on the concrete foundation 300 by marking out or the like. For example, four anchor bolts 400 are installed for each support post 210, 220. In the marking out work, two lines (dashed lines in FIG. 5 ) are drawn so that the anchor bolts 400 of the support posts 210, 220 installed in the extension direction W of the dam 100 (the width direction intersecting with the flow direction F) form two rows. The anchor bolts 400 for each support post 210, 220 are installed at predetermined positions on each line.

[0008] A base (not shown) is installed for the four anchor bolts 400 for each support pillar 210, 220, and each support pillar 210, 220, to which a base plate 500 (described later) is attached, is installed on each base. In this case, the tip of the anchor bolt 400 protruding from the base is inserted into an anchor bolt hole 510 formed in the base plate 500. Thereafter, the support pillars 210, 220 are connected to the anchor bolts 400 via the base plate 500 and the base, and concrete is poured to fill in the connected portions.

[0009] For example, the upstream support pillar 210 is erected so as to be inclined from the ground side toward the downstream side of the concrete foundation 300. Therefore, the ground side end face of the steel pipe used for the support pillar 210 is formed as an inclined end face that forms a predetermined angle with respect to an axis 210x that passes through the center of the support pillar 210. The support pillar 210 is erected on the concrete foundation 300 so that a leading end portion 211 that is located closest to the tip along the axis 210x on the inclined end face faces upstream, and a rear end portion 212 that is opposite in the radial direction faces downstream.

[0010] As described above, the installation direction of the upstream support 210 relative to the concrete foundation 300 (the direction inclining from the upstream side to the downstream side) and the installation positions of the anchor bolts 400 are fixed. When connecting one upstream support 210 to the anchor bolt 400 installed in the concrete foundation 300 via the base plate 500, it is not arbitrary but fixed as to which anchor bolt 400 is inserted into which anchor bolt hole 510 of the base plate 500.

[0011] 5 is a plan view showing a base plate portion attached to the upstream support column 210. The base plate 500 attached to each upstream support column 210 is formed in a circular or approximately circular shape in plan view, and has four anchor bolt holes 510 around an axis 500x passing through the center. When attached to the upstream support column 210, the four anchor bolt holes 510 are provided at equal intervals (equal angles of 90°) around the axis 500x of the base plate 500 on the outer periphery of the upstream support column 210.

[0012] Each anchor bolt hole 510 formed in the base plate 500 is adapted to align with an anchor bolt 400 installed in the concrete foundation 300. For this purpose, the base plate 500 is attached to the upstream support 210 so that the anchor bolt hole 510, through which the anchor bolt 400 is inserted, is located at a position sandwiched between the front end 211 and the rear end 212 of the upstream support 210 (indicated by the dashed line in FIG. 5 ).

[0013] 6 is a diagram illustrating a conventional method for attaching a base plate 500 to a support column 210, and is a view of the support column 210 as viewed from the end face on the ground side. When attaching the base plate 500 to the support column 210, the support column 210 is laid on a surface plate 600 so that the leading end 211 and the trailing end 212 are on the same or approximately the same horizontal plane. In this state, the base plate 500, which is suspended by a crane C or the like via the two upper anchor bolt holes 510 in the vertical direction, is brought close to the support column 210.

[0014] With the base plate 500 in contact with the support 210, for example, the distance 600D between the two upper anchor bolt holes 510 and the surface plate 600 is measured using a convex meter. If the distances 600D between the upper anchor bolt holes 510 and the surface plate 600 are not the same, it is necessary to adjust the height position of the lower anchor bolt hole 510 on the base plate 500 by operating the crane C. After the adjustment, it is necessary to measure the distance 600D again using the convex meter. Furthermore, the work of attaching the base plate 500 to the support 210 can take time depending on the worker due to misreading of the convex meter scale or differences in the measurement position depending on the worker performing the measurement.

[0015] Therefore, the present invention has been made in consideration of the above-mentioned problems, and has an object to provide a technique that makes it easy to attach a base plate to a support that constitutes a capture body. [Means for solving the problem]

[0016] The setting jig of the present invention, which solves the above problem, is a setting jig used to attach a base plate to a support pillar that is erected at an angle to the flow direction of a river, of a capture body to be installed on a dam, and is provided with a pair of mounting portions that are spaced apart at the same distance as the distance between at least two holes that are formed equally spaced circumferentially on the base plate, a connecting portion that connects the pair of mounting portions to each other at one end while maintaining the distance, and a spirit level provided on the connecting portion, wherein each of the pair of mounting portions has an insertion portion at the other end that is inserted into the two holes, and the spirit level measures whether the two holes are included in the same horizontal plane when the insertion portion is inserted into the two holes.

[0017] In the setting jig according to one aspect of the present invention, the surface of the connecting portion on which the level is provided and an imaginary plane including the axes of the two insertion portions are parallel to each other.

[0018] A setting jig according to one aspect of the present invention is used when attaching the base plate to the end face of the support column on the ground side, which is inclined with respect to the axis of the support column.

[0019] Furthermore, a base plate mounting method according to the present invention for solving the above-mentioned problems is a base plate mounting method for mounting a base plate to a support pole of a capture body installed on a dam, which is erected at an angle to the flow direction of a river, by laying the base plate on the support pole, the method comprising: an approaching step of bringing the base plate close to the support pole in a laid-down state; a measuring step of measuring whether at least two holes formed in the base plate in the circumferential direction on either side of the support pole are on the same horizontal plane; and a step of attaching the base plate to the support pole when the two holes are on the same horizontal plane. and an attachment process, wherein the measuring process uses a setting jig that includes a pair of attachment parts spaced the same (including approximately the same) as at least two holes formed at equal intervals in the circumferential direction on the base plate, a connecting part that connects the pair of attachment parts at one end while maintaining the spacing, and a spirit level provided on the connecting part, and inserts insertion parts provided on the other end of each of the pair of attachment parts into the holes, and when the insertion parts are inserted into the holes, measures using the spirit level whether the two holes are included in the same horizontal plane.

[0020] In a base plate mounting method according to one aspect of the present invention, the setting jig is used when mounting a base plate to a support pillar having an end face to which the base plate is mounted that is inclined with respect to the axis of the support pillar. [Effects of the Invention]

[0021] According to the present invention, it is possible to easily attach the base plate to the support pole that constitutes the capture body. [Brief explanation of the drawings]

[0022] [Figure 1A] FIG. 2 is a front view of a setting jig according to the present invention. [Figure 1B] FIG. 2 is a side view of a setting jig according to the present invention. [Figure 2] 10 is a flowchart of a method for attaching a base plate. [Figure 3]FIG. 10 is a schematic view showing a state in which the setting jig according to the present invention is set on a base plate. [Figure 4A] FIG. 1 is a perspective view showing a permeable sabo dam equipped with a trapping body. [Figure 4B] FIG. 4B is a side view of the capture body shown in FIG. 4A. [Figure 5] FIG. 10 is a plan view showing the base plate portion attached to the support. [Figure 6] FIG. 10 is a diagram illustrating a conventional method for attaching a base plate to an upstream support pole, as viewed from the end face side of the support pole on the ground side. DETAILED DESCRIPTION OF THE INVENTION

[0023] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that in the following description, the drawings are schematic, and the dimensional relationships and ratios of elements may differ from the actual ones. The dimensional relationships and ratios may differ between the drawings.

[0024] The jig according to the present invention is a setting jig 1 used to attach a base plate 500 to the supports 210, 220 of a capture body 200 in a permeable sabo dam 100, and is applied to attaching the base plate 500 to the supports 210, 220 that are erected at an angle to the flow direction F (see FIG. 4A) in the capture body 200. FIG. 1A is a front view of the setting jig 1 according to the present invention. FIG. 1B is a side view of the setting jig 1 according to the present invention.

[0025] The jig according to the present invention is a set jig 1 used to lay down upright supports 210, 220 of a capture body 200 to be installed on a dam 100, the supports being inclined with respect to the river flow direction F, and to attach a base plate to the supports 210, 220. The set jig includes a pair of mounting portions 10 spaced apart at a distance 10D that is the same as the distance between at least two anchor bolt holes 510 formed at equal intervals in the circumferential direction of the base plate 500, a connecting portion 20 that connects the pair of mounting portions 10 at one end 10a while maintaining the distance 10D, and a level 30 provided on the connecting portion 20, wherein the pair of mounting portions 10 each have a bolt (insertion portion) 11 at the other end 10b that is inserted into the two anchor bolt holes 510, and the level 30 measures whether the two anchor bolt holes 510 are included in the same horizontal plane when the bolt 11 is inserted into the two anchor bolt holes 510. The set jig 1 will be described in detail below.

[0026] The setting jig 1 is formed of, for example, steel, and includes a pair of mounting members (mounting portions) 10, a connecting member (connecting portion) 20, a spirit level 30, a reinforcing member 40, and a gripping member 50.

[0027] The mounting members 10 are long, rectangular plate materials in a plan view. The pair of mounting members 10 are connected to each other at one end (one end) 10a in the longitudinal direction by a connecting member 20. The pair of mounting members 10 and the connecting member 20 form a right angle or a nearly right angle with each other. The mounting members 10 and the connecting member 20 are connected to each other by fasteners such as bolts and nuts. When the setting jig 1 is attached to the base plate (hereinafter also referred to as the "attached state"), the connecting member 20 is connected to the surface of the mounting member 10 facing away from the base plate.

[0028] The mounting member 10 has a bolt 11 at the other end 10b. Of the four anchor bolt holes 510 formed in the base plate 500, the bolts 11 are inserted into the lower two anchor bolt holes 510 when the mounting member 10 is suspended by the crane C. The mounting member 10 has through holes (not shown) at the other end 10b, and a bolt 11 is attached to each of these through holes so as not to be able to rotate relative to the base plate 500. The bolts 11 protrude from the side of the surface to which the connecting member 20 is connected toward the side of the surface that comes into contact with the base plate 500 in the mounted state. For example, the distance 11D between the axes 11x passing through the centers of the two bolts 11 is the same as or approximately the same as the distance 510D between the axes 510x of two anchor bolt holes 510 of the base plate 500 that are circumferentially adjacent to each other.

[0029] In this embodiment, bolt 11 is used as the part that is inserted into anchor bolt hole 510 of base plate 500, but it is not limited to a bolt as long as it is a rod-shaped member that can be inserted into anchor bolt hole 510 of base plate 500.

[0030] The pair of mounting members 10 are provided with a predetermined distance between them, and the two bolts 11 are positioned at the same position from the edge on the other end 10b side of the mounting members 10. The distance 10D between the pair of mounting members 10 is maintained by the connecting member 20. Here, the "distance 10D between the mounting members 10" corresponds to, for example, the distance 11D between the axes 11x of the bolts 11 of each mounting member 10, and also corresponds to the distance 510D between the two anchor bolt holes 510 in the base plate 500.

[0031] The connecting member 20 is a long plate material that is rectangular in plan view. The connecting member 20 has a magnetic plate 21. The magnetic plate 21 is provided in the center or approximately the center in the longitudinal direction of the connecting member 20. A spirit level 30, which will be described later, is detachably attached to the magnetic plate 21. The magnetic plate 21 faces the side opposite to the other end 10b of the mounting member 10 and is attached to a reference surface 20a that extends in the longitudinal direction of the connecting member 20.

[0032] The reference surface 20a is a surface that extends in the direction connecting the pair of mounting members 10 and in the thickness direction of the connecting member 20, and is the surface that faces the side on which one end 10a of the mounting member 10 faces. The reference surface 20a is parallel to an imaginary plane 11f that includes the axes 11x of the two bolts 11 of the mounting member 10. Here, "parallel" also includes "approximately parallel" with a tolerance.

[0033] The spirit level 30 is detachably attached to the magnetic plate 21 of the connecting member 20. When the base plate 500 is attached to the inclined end surfaces of the supports 210, 220 on which it is laid, the spirit level 30 measures whether the reference surface 20a of the connecting member 20 of the setting jig 1 attached to two of the four anchor bolt holes 510 in the base plate 500 is horizontal or approximately horizontal. Since the reference surface 20a of the connecting member 20 is parallel to the imaginary plane 11f of the bolt 11, the fact that the reference surface 20a is horizontal or approximately horizontal means that the two anchor bolt holes 510 in the base plate 500 into which the bolt 11 is inserted are included in the same horizontal plane. The spirit level 30 may be a known spirit level, and may be either an analog spirit level or a digital spirit level.

[0034] The reinforcing member 40 is the same member as the connecting member 20. The reinforcing member 40 is connected to the mounting member 10 at a predetermined distance on the side of the other end 10b of the mounting member 10 relative to the connecting member 20. The reinforcing member 40 further prevents the pair of mounting members 10 from approaching or separating from each other, and can maintain constant distances 10D, 11D.

[0035] In the attached state, the gripping members 50 are attached to the surfaces of the connecting members 20 and the reinforcing members 40 that face away from the base plate 500. The gripping members 50 are provided in the center or approximately the center in the longitudinal direction of the connecting members 20 and the reinforcing members 40. An operator can hold the setting jig 1 by gripping the gripping members 50.

[0036] Next, a description will be given of a method for attaching the base plate 500 to the supports 210, 220. The attachment method according to the present invention is a method for attaching the base plate 500 to the supports 210, 220 of the capture body 200 to be installed on the dam 100, which are erected at an angle to the river flow direction F, by laying the supports 210, 220 flat, and includes an approaching step S2 for bringing the base plate 500 close to the supports 210, 220 in a laid-down state, measuring steps S4 and S7 for measuring whether at least two anchor bolt holes 510 formed at equal intervals in the circumferential direction of the base plate 500 are on the same horizontal plane, and an attachment step S5 for attaching the base plate 500 to the supports 210, 220 with the two anchor bolt holes 510 on the same horizontal plane. and in measuring steps S4 and S7, a setting jig 1 is used which includes a pair of mounting portions 10 provided at a distance 10D that is the same as the distance 10D between at least two anchor bolt holes 510 formed at equal intervals in the circumferential direction on base plate 500, a connecting portion 20 that connects the pair of mounting portions 10 at one end thereof while maintaining the distance 10D, and a spirit level 30 provided on connecting portion 20, to insert bolts 11 provided at the other end portions 10b of the pair of mounting portions 10 into anchor bolt holes 510, and measure using spirit level 30 whether or not the two anchor bolt holes 510 are included in the same horizontal plane with each other in a state in which bolts 11 are inserted into anchor bolt holes 510. The method for mounting base plate 500 will now be described in detail.

[0037] FIG. 2 is a flowchart of a method for attaching the base plate 500. FIG. 3 is a schematic diagram showing a state in which the setting jig 1 according to the present invention is set on the base plate 500. The following describes the upstream support 210 as an example. First, the support 210 is set on the surface plate 600 (setting process: step S1). For example, the support 210 is placed between two H-beams 610 (see FIG. 6) set on the surface plate 600. The support 210 is set on the surface plate 600 so that the leading end 211 and the trailing end 212 (see FIG. 4B or FIG. 5) of the inclined end face of the support 210 to which the base plate 500 is attached are on the same horizontal plane.

[0038] Next, the base plate 500 to be attached to the support column 210, which is suspended by, for example, a crane C, is brought close to the inclined end face of the support column 210 (approaching step: step S2). With the base plate 500 in contact with the support column 210, the position where the support column 210 will be attached is marked in advance on the surface of the base plate 500 facing the support column 210. The marked position on the base plate 500 and the support column 210 are aligned.

[0039] In this state, the angle of the base plate 500 relative to the surface plate 600 is measured using, for example, a square. In other words, it is confirmed whether the base plate 500 is at a right angle to the surface plate 600. It is confirmed that the base plate 500 is at a right angle to the surface plate 600 and that the inclined end face of the support 210 and the base plate 500 are in surface contact.

[0040] Next, the setting jig 1 is set in the two anchor bolt holes 510 on the lower side of the suspended base plate 500 (setting process: step S3). Specifically, the bolts 11 of each mounting member 10 of the setting jig 1 are inserted into the two anchor bolt holes 510 on the lower side of the base plate 500.

[0041] After the setting jig 1 is set on the base plate 500, the level 30 is used to measure whether the reference surface 20a of the connecting member 20 of the setting jig 1 is in a horizontal or approximately horizontal state, and further, it is measured whether two of the four anchor bolt holes 510 in the base plate into which the bolts 11 are inserted are included in the same horizontal plane (measurement step: step S4). Here, the term "horizontal or approximately horizontal state" may, for example, include a predetermined tolerance from a completely horizontal state.

[0042] If the spirit level 30 indicates a horizontal or approximately horizontal state (step S4: YES), the base plate 500 is temporarily fixed to the support 210 using a predetermined jig, and the support 210 and the base plate 500 are fixed to each other by welding (fixing step: step S5). This completes the work of attaching the base plate 500 to the support 210.

[0043] In the measurement step S4, if the measurement result indicated by the level 30 cannot be recognized as a horizontal state or an approximately horizontal state, the position of the base plate 500 relative to the support 210 is adjusted (adjustment step: step S6). Specifically, the amount of lifting by the crane C hung on the two upper anchor bolt holes 510 of the base plate 500 is adjusted. For example, the level 30 can determine that, of the four anchor bolt holes 510 formed in the base plate 500, one side (for example, the upper and lower anchor bolt holes 510 on the right side in FIG. 3) and the other side (for example, the upper and lower anchor bolt holes 510 on the left side in FIG. 3) are tilted and in a lower position relative to the anchor bolt holes 510 on either side.

[0044] Based on the measurement results of the level 30, the crane C is used to adjust the reference surface 20a of the connecting member 20 of the setting jig 1 so that it is in a horizontal or approximately horizontal state. This work is carried out while checking the level 30, that is, while measuring with the level 30 whether the setting jig 1 is in a horizontal or approximately horizontal state (re-measurement step: step S7).

[0045] The adjustment step S6 and the re-measurement step S7 are performed until the setting jig 1 is in a horizontal or approximately horizontal state. That is, if it is confirmed that the reference surface 20a of the connecting member 20 of the setting jig 1 is in a horizontal or approximately horizontal state (step S7: YES), the fixing step S5 is performed, and if it is confirmed that the setting jig 1 is not in a horizontal or approximately horizontal state (step S7: NO), the adjustment step S6 is performed.

[0046] After it has been confirmed that the base plate 500 is in a horizontal or approximately horizontal state in the measurement step S4 and the re-measurement step S7, the distance 600D from each of the two anchor bolt holes 510 on the upper side of the base plate 500 to the surface plate 600 may be measured.

[0047] The base plate 500 must be attached to any of the upright supports 210 inclined toward the flow direction F of the capture body 200 so that the positions of the anchor bolt holes 510 in the base plate 500 relative to the leading end 211 and the trailing end 212 of the inclined end face are the same or approximately the same. For example, the four anchor bolts 400 that secure each support 210 to the concrete foundation 300 are arranged in two rows extending in the width direction of the capture body 200 (see FIG. 5 ). Therefore, rather than simply attaching the base plate 500 to the support 210, it is necessary to pay attention to the angular positions of the four anchor bolt holes 510 relative to the leading end 211 and the trailing end 212 of the inclined end face on the ground side. As described above, the setting jig 1 according to the present invention makes it possible to easily attach the base plate 500 to the upright upright supports 210 of a capture body in a dam.

[0048] The pair of mounting portions 10 of the setting jig 1 are perpendicular or approximately perpendicular to the connecting member 20, with the same or approximately the same spacing as the two anchor bolt holes 510 of the base plate 500. As a result, when attaching the base plate 500 with the support pillar 210 laid horizontally, if it can be confirmed that the reference surface 20a of the connecting member 20 of the setting jig 1 extends in a horizontal or approximately horizontal direction with the bolts 11 inserted into the two anchor bolt holes 510 on the underside of the base plate 500, the two anchor bolt holes 510 on the underside of the base plate will be included in the same or approximately the same horizontal plane. If it can be confirmed that the horizontal or approximately horizontal state is maintained using the spirit level 30 of the setting jig 1 set on the base plate 500, it can be easily determined that the anchor bolt holes 510 of the base plate 500 are in the desired positions relative to the front end 211 and rear end 212 of the support pillar 210.

[0049] <Other> While the preferred embodiments of the present invention have been described above, the present invention is not limited to the above embodiments and includes all aspects encompassed by the concept and scope of the claims. Furthermore, various configurations may be selectively combined as appropriate to achieve at least some of the above-described problems and advantages. Furthermore, for example, the shape, material, arrangement, size, etc. of each component in the above embodiments may be modified as appropriate depending on the specific use of the present invention. For example, in the above embodiments, the pair of mounting members 10 are fixed in position in the longitudinal direction relative to the connecting member 20 and the reinforcing member 40. However, they may be movable in the longitudinal direction relative to the connecting member 20 and the reinforcing member 40. This allows the same mounting jig to be applied to holes formed in base plates 500 of various sizes and with various spacings between them. [Explanation of symbols]

[0050] 1. Set of jigs 10···Attachment member (attachment portion), 10a···One end (one end), 10b···Other end (other end), 10D···Spacing, 11···Bolt (insertion portion), 20···Connecting member (connecting portion), 30···Level, 40···Reinforcing member, 50···Gripping member 100···Sabo dam, 200···Capturing body, 210, 220···Support pillar, 300···Concrete foundation, 400···Anchor bolt, 500···Base plate, 510···Anchor bolt hole (hole)

Claims

1. A setting jig used to lay a support pillar of a capture body to be installed on a dam, which is erected at an angle to the direction of river flow, and to attach a base plate to the support pillar, a pair of mounting portions provided at the same interval as a distance between at least two holes formed at equal intervals in the circumferential direction on the base plate; a connecting portion that connects the pair of mounting portions to each other at one end thereof while maintaining the spacing; a level provided on a reference surface of the connecting portion, the reference surface being a surface extending in a direction connecting the pair of mounting portions and in a thickness direction of the connecting portion; Equipped with the pair of mounting portions each have an insertion portion at the other end that is inserted into the two holes, The level measures whether the reference surface is horizontal or approximately horizontal when the insertion portion is inserted into the two holes, and measures whether the two holes are included in the same horizontal plane. A set jig characterized by:

2. 2. The setting jig according to claim 1, wherein the reference surface and an imaginary plane including the axes of the two insertion portions are parallel to each other.

3. 3. The setting jig according to claim 1, which is used when attaching the base plate to an end face of the support column on the ground side that is inclined with respect to the axis of the support column.

4. A method for attaching a base plate to a support pillar that is erected at an angle to the flow direction of a river, for a capture body to be installed on a dam, comprising the steps of: an approaching step of bringing the base plate closer to the support column in a lying state; a measuring step of measuring whether at least two holes formed at equal intervals in the circumferential direction of the base plate are on the same horizontal plane; a mounting step of mounting the base plate to the support pole with the two holes on the same horizontal plane; Including, In the measuring step, a setting jig is used that includes a pair of mounting portions provided at the same interval as at least two holes formed at equal intervals in the circumferential direction on the base plate, a connecting portion that connects the pair of mounting portions at one end while maintaining the interval, and a level provided on the connecting portion, and insertion portions provided on the other end of each of the pair of mounting portions are inserted into the holes, and with the insertion portions inserted into the holes, the level is used to measure whether the two holes are included in the same horizontal plane. A method for attaching a base plate.

5. 5. The method for attaching a base plate according to claim 4, wherein the setting jig is used when attaching a base plate to a support pillar having an end face to which the base plate is attached that is inclined with respect to the axis of the support pillar.

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