Structure and method for constructing the structure

Abstract

Provide a structure that transfers an election piece from a first metal structural member to a second metal structural member and can also serve as a lifting tool for the election piece. 【Solution means】The structure 1 includes a first metal structural member 10A, a second metal structural member 10B, and an election piece 20 that is formed in a plate shape, has a first insertion hole 23 through which a crane lifting tool is inserted, and is transferred from the first metal structural member to the second metal structural member. Among the election pieces, a portion on one side Z1 in the longitudinal direction Z of the election piece is welded to the first metal structural member, and a portion on the other side Z2 of the election piece is welded to the second metal structural member.

Description

Technical Field

[0001] The present disclosure relates to a structure and a method for constructing the structure.

Background Art

[0002] Conventionally, erection pieces have been used. Patent Document 1 discloses that insertion holes for inserting a crane sling are formed in the erection piece of the upper steel column (second metal structure member) and the erection piece of the lower steel column (first metal structure member).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the method for constructing the structure of Patent Document 1, an erection piece straddling the upper steel column and the lower steel column was not assumed.

[0005] The present disclosure has been made in view of such problems, and an object thereof is to provide a structure capable of passing an erection piece from a first metal structure member to a second metal structure member and also using the erection piece as a sling, and a method for constructing the structure.

Means for Solving the Problems

[0006] The present disclosure includes a first metal structural member, a second metal structural member, and an erection piece that is formed in a plate shape and has a first insertion hole through which a crane sling is inserted, and that extends from the first metal structural member to the second metal structural member. One side portion of the erection piece in the longitudinal direction of the erection piece is welded to the first metal structural member, and the other side portion of the erection piece is welded to the second metal structural member.

[0007] Another aspect of the present disclosure is a method for constructing the structure described above, the method including: a first welding step of welding the one side portion to the first metal structural member; a lifting step of lifting the erection piece with a crane using the first insertion hole; and a second welding step of welding the other side portion to the second metal structural member after the lifting step.

Advantages of the Invention

[0008] In the structure and the method for constructing the structure of the present disclosure, the erection piece can be used to bridge the first metal structural member and the second metal structural member, and can also be used as a sling.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Mode for Carrying Out the Invention

[0010] (First Embodiment) Hereinafter, a first embodiment of a structure and a method for constructing the structure according to the present disclosure will be described with reference to FIGS. 1 to 3. As shown in FIG. 1, the structure 1 of the present embodiment includes a first steel shape (first metal structure member, steel shape) 10A, a second steel shape (second metal structure member, steel shape) 10B, and an erection piece 20. In FIG. 1, the second steel shape 10B is shown by a two-dot chain line, and hereinafter in FIG. 1 and below, the welding parts 15 and 51 to be described later are hatched.

[0011] In the present embodiment, the configuration of the first steel shape 10A and the configuration of the second steel shape 10B are the same as each other. Therefore, the configuration of the first steel shape 10A is indicated by adding the capital letter "A" to the numerical part of the reference sign. The configuration of the second steel shape 10B corresponding to the first steel shape 10A is indicated by adding the capital letter "B" to the same numerical part as the reference sign of the first steel shape 10A. This omits duplicate explanations. For example, a first flange 11A of the first steel shape 10A to be described later and a first flange 11B of the second steel shape 10B have the same configuration as each other.

[0012] Here, the first steel shape 10A, the second steel shape 10B, and the erection piece 20 are each formed in a shape extending in the longitudinal direction, and the longitudinal directions of each are the same as each other. Hereinafter, the longitudinal direction of each of the first steel shape 10A, the second steel shape 10B, and the erection piece 20, which are the same as each other, will be referred to as the longitudinal direction Z.

[0013] The first steel shape 10A is an H-shaped steel formed of a steel plate. The first steel shape 10A has a first flange 11A, a second flange 12A, and a web 13A. The first flange 11A, the second flange 12A, and the web 13A are each formed in a flat plate shape. The first flange 11A is disposed above the second flange 12A. The first flange 11A and the second flange 12A face each other in the vertical direction. The web 13A is disposed between the first flange 11A and the second flange 12A. The web 13A is joined to the middle part in the width direction of the first flange 11A and the middle part in the width direction of the second flange 12A, respectively. Note that the first section steel is not limited to H-shaped steel, and may be a box girder or the like.

[0014] The longitudinal direction Z of the first section steel 10A is along the horizontal plane. Here, A is along (extends along) B means that the angle formed by A and B is 30° or less. This formed angle may be 15° or less. Note that the first section steel 10A may be rolled H-shaped steel or welded fabricated H-shaped steel. The second section steel 10B has a first flange 11B, a second flange 12B, and a web 13B configured in the same manner as the first flange 11A, the second flange 12A, and the web 13A of the first section steel 10A. Note that the second section steel is not limited to H-shaped steel, and may be a box girder or the like.

[0015] The first section steel 10A and the second section steel 10B are butted (arranged side by side) in the longitudinal direction Z. As described above, the first section steel 10A and the second section steel 10B include section steel. Note that the cross-sectional shape orthogonal to the longitudinal direction Z of the second section steel 10B may be different from the cross-sectional shape orthogonal to the longitudinal direction Z of the first section steel 10A.

[0016] The erection piece 20 is a plate for temporary installation. The erection piece 20 is formed in a flat plate shape (plate shape). In this example, it is integrally formed of a steel plate. The erection piece 20 is a single plate-like member. The thickness direction X of the election piece 20 is along the horizontal plane. The thickness direction X is orthogonal to the longitudinal direction Z. Here, a short-side direction Y that is orthogonal to the thickness direction X and the longitudinal direction Z respectively is defined. In the present embodiment, the length of the election piece 20 in the longitudinal direction Z is longer than the length of the election piece 20 in the short-side direction Y. The election piece 20 presents a rectangular shape that is long in the longitudinal direction Z when viewed along the thickness direction X. Note that the length of the election piece 20 in the short-side direction Y may be longer than the length of the election piece 20 in the longitudinal direction Z.

[0017] In this example, notches 21 and 22 are respectively formed in the middle part of the longitudinal direction Z on the upper surface of the election piece 20 and the middle part of the longitudinal direction Z on the lower surface of the election piece 20. The notches 21 and 22 present a semi-circular shape when viewed along the thickness direction X. Note that the shape presented by the notch when viewed along the thickness direction X is not limited to a semi-circular shape, and may also be a rectangular shape, a trapezoidal shape, etc. At least one of the notches 21 and 22 may not be formed in the election piece 20.

[0018] A first insertion hole 23 is formed in the election piece 20. The first insertion hole 23 is provided in a part of the election piece 20 on one side Z1 in the longitudinal direction Z (hereinafter simply referred to as one side Z1). Hereinafter, among the longitudinal direction Z, the side opposite to one side Z1 is referred to as the other side Z2 in the longitudinal direction Z (hereinafter simply referred to as the other side Z2). In this example, the first insertion hole 23 presents a circular shape when viewed along the thickness direction X. The first insertion hole 23 penetrates the election piece 20 in the thickness direction X. Note that the shape of the first insertion hole 23 when viewed along the thickness direction X is not limited to a circular shape.

[0019] A portion of one side Z1 of the erection piece 20 is welded to the first flange 11A of the first steel section 10A. The portion of one side Z1 of the erection piece 20 and the first flange 11A are connected to each other by a weld portion 15. A portion of the other side Z2 of the erection piece 20 is welded to the first flange 11B of the second steel section 10B. That is, the portion of the other side Z2 of the erection piece 20 will be welded to the second steel section 10B in the future or has already been welded to the second steel section 10B.

[0020] As shown in FIG. 2, the structure 1 (the first steel section 10A) preferably includes two erection pieces 20, and the two erection pieces 20 are welded to both ends in the longitudinal direction Z of the first steel section 10A. The lifting tools 200 of the crane 201 are respectively inserted into the first insertion holes 23 of each erection piece 20. The lifting tool 200 is lifted by the crane 201. As shown in FIG. 1, the erection piece 20 extends in the longitudinal direction Z from the first steel section 10A to the second steel section 10B. In other words, the erection piece 20 extends in the longitudinal direction Z until it reaches at least a part of the second steel section 10B from at least a part of the first steel section 10A.

[0021] Next, a method for constructing the structure 1 configured as described above (hereinafter simply referred to as the construction method) will be described. FIG. 3 is a flowchart showing the construction method S1. First, in the first welding step (step S10 shown in FIG. 3), a portion of one side Z1 of the two erection pieces 20 is welded to both ends of the first steel section 10A by a welding machine (not shown). When the first welding step S10 is completed, the process proceeds to step S11.

[0022] Next, in the lifting step S11, the erection pieces 20 are lifted by the crane 201 using the first insertion holes 23 of the two erection pieces 20 welded to the first steel shape 10A. When the lifting step S11 is completed, the process proceeds to step S12. Next, in the pulling step S12, for example, a wire (not shown) or the like is inserted through the first insertion hole 23 of the erection piece 20 to perform a pulling operation that moves the first steel shape 10A in the longitudinal direction Z and the thickness direction X. Then, the first steel shape 10A is moved to a position where it abuts against the second steel shape 10B in the longitudinal direction Z. When the pulling step S12 is completed, the process proceeds to step S13.

[0023] Next, in the second welding step S13, the portion on the other side Z2 of the erection piece 20 is welded to the second steel shape 10B. The second welding step S13 is performed after the lifting step S11 and after the pulling step S12.

[0024] By performing the above steps, the structure 1 is constructed. After this, the first steel shape 10A and the second steel shape 10B are connected to each other by welding or the like. The erection piece 20 is removed from the first steel shape 10A and the second steel shape 10B. In this way, the first steel shape 10A and the second steel shape 10B are connected to each other with the erection piece 20 removed.

[0025] Note that in the construction method S1, the pulling step S12 may not be performed.

[0026] As described above, in the structure 1 of the present embodiment, the erection piece 20 can be passed from the first steel shape 10A to the second steel shape 10B. And by inserting the lifting tool 200 of the crane 201 through the first insertion hole 23 of the erection piece 20, the first steel shape 10A can be easily lifted via the erection piece 20, and the erection piece 20 can also be used as another lifting tool.

[0027] The first insertion hole 23 is provided in a portion on one side Z1 of the election piece 20. For example, when the hoist 200 is inserted through the first insertion hole 23 of the election piece 20 to lift the election piece 20, compared with the case where the first insertion hole 23 is provided in a portion on the other side Z2 of the election piece 20, since the distance between the welded portion of the first steel section 10A and the election piece 20 and the first insertion hole 23 is close, the stress acting on this welded portion can be reduced. The first steel section 10A and the second steel section 10B include steel sections. Therefore, the first steel section 10A and the second steel section 10B can be configured at a reduced manufacturing cost by using a generally used member such as a steel section.

[0028] Also, in the construction method S1 of the present embodiment, in the first welding step S10, a portion on one side Z1 of the election piece 20 is welded to the first steel section 10A, and in the lifting step S11, the election piece 20 is lifted by the crane 201 using the first insertion hole 23. Then, in the second welding step S13, a portion on the other side Z2 of the election piece 20 is welded to the second steel section 10B, and the first steel section 10A and the second steel section 10B can be connected via the election piece 20.

[0029] The structure 1 of the present embodiment can be variously deformed in its configuration as described below. As shown in FIG. 1, in the structure 1 of the present embodiment, a second insertion hole 24 may be provided in a portion on the other side Z2 of the election piece 20. By configuring in this way, for example, after the election piece 20 is welded to the second steel section 10B, when two election pieces 20 are welded to the structure 1, by inserting three hoists 200 respectively into three of the first insertion hole 23 and the second insertion hole 24 provided in each of the two election pieces 20 to lift the structure 1, the structure 1 can be lifted in a stable state compared with the case where the structure 1 is lifted by two hoists 200.

[0030] In the structure 1 of the present embodiment, the first insertion hole 23 may be provided in a portion on the other side Z2 of the erection piece 20. By configuring in this way, when hanging the structure 1 by inserting the lifting tool 200 into the first insertion hole 23, the operability of the structure 1 can be improved when pulling the structure 1 by inserting a wire or the like into the first insertion hole 23 to move it. This is more suitable when the structure 1 is relatively light.

[0031] The length in the longitudinal direction Z of the portion on one side Z1 of the erection piece 20 may be longer than the length in the longitudinal direction Z of the portion on the other side Z2 of the erection piece 20. By configuring in this way, since the length of the portion on one side Z1 of the erection piece 20 welded to the first steel shape 10A becomes longer, the portion on one side Z1 of the erection piece 20 can withstand a greater stress.

[0032] (Second Embodiment) Next, a second embodiment of the present disclosure will be described with reference to FIGS. 4 and 5. The same parts as those in the above embodiment are denoted by the same reference numerals and the description thereof is omitted, and only the different points will be described. As shown in FIG. 4, the structure 2 of the present embodiment is an offshore structure, and more specifically, a jacket-type structure. For example, the structure 2 supports the lower end portion of a tower in an offshore windmill which is an offshore structure. In FIG. 4, only one of the braces 30 to be described later is shown by a two-dot chain line, and only one of the legs 35 is shown. Note that the structure may be a river structure such as a bridge or a pier. As shown in FIGS. 4 and 5, the structure 2 includes a plurality of braces (first metal structure members, steel pipes) 30, a plurality of legs (second metal structure members, steel pipes) 35, and a plurality of erection pieces 20.

[0033] As shown in FIG. 4, each leg 35 has a leg body 36 and a leg connection portion 37. The leg body 36 and the leg connection part 37 are each formed of a steel pipe. The leg body 36 extends in the vertical direction. For example, the lower end part of the leg body 36 is connected to a pile driven into the seabed ground. The upper end part of the leg body 36 is connected to the tower. The leg connection part 37 extends from the leg body 36 in a direction intersecting the leg body 36. Each brace 30 is formed of a steel pipe. The brace 30 is a member that connects the legs 35 to each other.

[0034] As shown in FIG. 5, the diameter (outer diameter) of the leg connection part 37 of the leg 35 is larger than the diameter of the brace 30. The leg connection part 37 of the leg 35 and the brace 30 are butted against each other in the longitudinal direction Z. In this example, the leg connection part 37 and the brace 30 are coaxially arranged on the axis O1. As described above, the brace 30 and the leg 35 include steel pipes.

[0035] In the present embodiment, except for the portion where the notch 21 is formed, the position of the end on the side opposite to the brace 30 and the leg connection part 37 (the outer diameter side of the brace 30 and the leg connection part 37) in the short side direction Y of the erection piece 20 is constant regardless of the position in the longitudinal direction Z. The width L1 along the short side direction Y of the portion on the other side Z2 of the erection piece 20 is shorter than the width L2 along the short side direction Y of the portion on one side Z1 of the erection piece 20. In other words, the distance between the portion on the other side Z2 of the erection piece 20 and the axis O1 is longer than the distance between the portion on one side Z1 of the erection piece 20 and the axis O1. That is, the position of the end on the axis O1 side of the erection piece 20 is stepped depending on the position in the longitudinal direction Z of the erection piece 20.

[0036] One side Z1 portion of the erection piece 20 is welded to the brace 30. The other side Z2 portion of the erection piece 20 is welded to the leg connection part 37. The brace 30 and the leg connection part 37 are connected to each other by welding or the like.

[0037] As described above, in the structure 2 of the present embodiment, the erection piece 20 is passed from the brace 30 to the leg 35, and the erection piece 20 can also be used as a lifting tool. And the structure 2 is an offshore structure. Therefore, the structure 2 with enhanced connection strength between the brace 30 and the leg 35 via the erection piece 20 can be used for offshore applications.

[0038] The structure 2 is a jacket-type structure, the first metal structural member is the brace 30, and the second metal structural member is the leg 35. Thereby, for the jacket-type structure including the brace 30 and the leg 35, the connection strength between the brace 30 and the leg 35 via the erection piece 20 can be enhanced. By inserting the lifting tool 200 through the first insertion hole 23 of the erection piece 20, the brace 30 can be easily lifted via the erection piece 20. And this brace 30 can be reliably connected to the leg 35.

[0039] In the erection piece 20, the width L1 is shorter than the width L2. Therefore, for example, even when the diameter of the leg connection portion 37 of the leg 35, which is the second metal structural member welded to the other side Z2 portion of the erection piece 20, is larger than the diameter of the brace 30, which is the first metal structural member welded to the one side Z1 portion of the erection piece 20, the leg connection portion 37 and the brace 30 can be coaxially connected to each other. The brace 30 and the leg 35 include steel pipes. Therefore, the brace 30 and the leg 35 can be configured with a suppressed manufacturing cost by using the generally used member of steel pipe.

[0040] Note that in the erection piece 20, the width L1 may be equal to or longer than the width L2. Both the first metal structural member and the second metal structural member may be legs or the like.

[0041] (Third Embodiment) Next, a third embodiment of the present disclosure will be described with reference to FIGS. 6 and 7. The same parts as those in the above embodiment are denoted by the same reference numerals, and the description thereof will be omitted, and only the different points will be described. As shown in FIG. 6, the structure 3 of the present embodiment is an offshore structure, and more specifically, a monopile type structure. The monopile type structure referred to here means a structure in which a single large-diameter pile is driven into the seabed ground or the like to support a windmill. The structure 3 includes a first plain pipe (first metal structure member, steel pipe, plain pipe) 40, a second plain pipe (second metal structure member, steel pipe) 45, and a plurality of erection pieces 20 (not shown). Each of the first plain pipe 40, the second plain pipe 45, etc. constitutes a monopile type structure.

[0042] As shown in FIG. 7, the first plain pipe 40 has a first bent steel plate (first metal structure member) 41, a second bent steel plate (second metal structure member) 42, and a plurality of erection pieces 20. Each of the first bent steel plate 41, the second bent steel plate 42, etc. constitutes the first plain pipe 40 of the monopile type structure. The first bent steel plate 41, the second bent steel plate 42, etc. are formed in an arc shape by the steel plates when viewed in the axial direction O3 of the first plain pipe 40. The first bent steel plate 41 and the second bent steel plate 42 are butted against each other in the longitudinal direction Z. The short side direction Y of the erection piece 20 substantially follows (including the meaning of following) the normal direction W1 of each of the first bent steel plate 41 and the second bent steel plate 42. In other words, the short side direction Y of the erection piece 20 substantially follows the normal direction W1 of the portions of the first bent steel plate 41 and the second bent steel plate 42 where the erection piece 20 is welded.

[0043] A portion on one side Z1 of the erection piece 20 is welded to the first bent steel plate 41. A portion on the other side Z2 of the erection piece 20 is welded to the second bent steel plate 42. The first bent steel plate 41 and the second bent steel plate 42 are connected to each other by welding. In this case, the ends of the first bent steel plate 41 and the second bent steel plate 42 of the erection piece 20 may be curved corresponding to the first bent steel plate 41 and the second bent steel plate 42.

[0044] As shown in FIG. 6, the first elementary pipe 40 and the second elementary pipe 45 are butted against each other in the longitudinal direction Z. A portion on one side Z1 of the erection piece 20 is welded to the first elementary pipe 40. A portion on the other side Z2 of the erection piece 20 is welded to the second elementary pipe 45. The first elementary pipe 40 and the second elementary pipe 45 are connected to each other by welding or the like.

[0045] As described above, in the structure 3 of the present embodiment, the erection piece 20 can be passed from the first elementary pipe 40 to the second elementary pipe 45, and the erection piece 20 can also be used as a lifting tool. The structure 3 is a monopile type structure, the first metal structure member is the first elementary pipe 40, and the second metal structure member is the second elementary pipe 45. Therefore, the connection strength between the first elementary pipe 40 and the second elementary pipe 45 via the erection piece 20 can be increased for the monopile type structure including the first elementary pipe 40 and the second elementary pipe 45.

[0046] The structure 3 is a monopile type structure, the first metal structure member is the first bent steel plate 41, and the second metal structure member is the second bent steel plate 42. Thereby, the connection strength between the first bent steel plate 41 and the second bent steel plate 42 via the erection piece 20 can be increased for the monopile type structure including the first bent steel plate 41 and the second bent steel plate 42 that constitute the first elementary pipe 40. And by inserting the lifting tool 200 into the first insertion hole 23 of the erection piece 20, the first bent steel plate 41 can be easily lifted via the erection piece 20. And the first bent steel plate 41 can be reliably connected to the second bent steel plate 42.

[0047] The short-side direction Y of the election piece 20 substantially follows the normal direction W1 of each of the first bent steel plate 41 and the second bent steel plate 42. Therefore, the election piece 20 can be reliably passed from the first bent steel plate 41 to the second bent steel plate 42. Then, the position of the election piece 20 with respect to the first bent steel plate 41 and the second bent steel plate 42 can be fixed, and displacement of the election piece 20 with respect to the first bent steel plate 41 and the second bent steel plate 42 during welding can be prevented.

[0048] Note that the first elementary pipe 40 may be integrally formed of a steel pipe. The same applies to the second elementary pipe 45,.... The short-side direction Y of the election piece 20 does not necessarily follow the normal direction W1 of each of the first bent steel plate 41 and the second bent steel plate 42.

[0049] (Fourth Embodiment) Next, a fourth embodiment of the present disclosure will be described with reference to FIG. 8. The same parts as those in the above embodiments are denoted by the same reference numerals, and the description thereof is omitted, and only different points will be described. As shown in FIG. 8, the structure 4 of the present embodiment has a composite floor slab 4a. In FIG. 8, the concrete 55 described later is indicated by a two-dot chain line.

[0050] The composite floor slab 4a includes a first bottom steel plate (first metal structure member) 50A, a second bottom steel plate (second metal structure member) 50B, an election piece 20, and concrete 55. The first bottom steel plate 50A and the second bottom steel plate 50B are formed in a flat plate shape by steel plates. The first bottom steel plate 50A and the second bottom steel plate 50B are butted against each other in the longitudinal direction Z. A portion on one side Z1 of the election piece 20 is welded to the first bottom steel plate 50A. A portion on the other side Z2 of the election piece 20 is welded to the second bottom steel plate 50B. In this example, the first insertion hole 23 is provided on the side of the election piece 20 opposite to the sides of the first bottom steel plate 50A and the second bottom steel plate 50B (the side separated from the first bottom steel plate 50A and the second bottom steel plate 50B) in the short-side direction Y.

[0051] The first bottom steel plate 50A and the second bottom steel plate 50B are connected to each other by a welded portion 51. The concrete 55 is disposed at a portion on the side of the erection piece 20 with respect to the first bottom steel plate 50A and the second bottom steel plate 50B. The erection piece 20 is embedded in the concrete 55. The first bottom steel plate 50A, the second bottom steel plate 50B, the erection piece 20, and the concrete 55 constitute a composite floor slab 4a. Note that the structure is not limited to the composite floor slab, and may be a flat steel plate or the like.

[0052] As described above, in the structure 4 of the present embodiment, the erection piece 20 can be passed from the first bottom steel plate 50A to the second bottom steel plate 50B, and the erection piece 20 can also be used as a lifting tool. The first metal structural member is the first bottom steel plate 50A, and the second metal structural member is the second bottom steel plate 50B. Therefore, with respect to the structure 4 including the first bottom steel plate 50A and the second bottom steel plate 50B that constitute the composite floor slab 4a, the connection strength between the first bottom steel plate 50A and the second bottom steel plate 50B via the erection piece 20 can be increased. By inserting the lifting tool 200 into the first insertion hole 23 of the erection piece 20, the first bottom steel plate 50A can be easily lifted via the erection piece 20. And the first bottom steel plate 50A can be surely connected to the second bottom steel plate 50B.

[0053] The first insertion hole 23 is provided on the side of the erection piece 20 opposite to the sides of the first bottom steel plate 50A and the second bottom steel plate 50B in the short side direction Y. Thereby, it is possible to easily perform the hanging of the structure 4 by inserting the lifting tool 200 of the crane 201 into the first insertion hole 23, and in this hanging, to easily perform the pulling for moving the structure 4 in the longitudinal direction Z and the thickness direction X by inserting a wire or the like into the first insertion hole 23. When the election piece 20 is formed with not only the first insertion hole 23 but also the second insertion hole, the operation may be performed using the second insertion hole of the election piece 20. Therefore, it is not necessary to perform the ball scattering operation of removing the lifting tool 200 from the first insertion hole 23 of the election piece 20.

[0054] As described above, the first to fourth embodiments of the present disclosure have been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes configuration changes, combinations, deletions, etc. within the scope not departing from the gist of the present disclosure. Furthermore, it goes without saying that the configurations shown in each embodiment can be used in appropriate combinations. For example, in the first embodiment, the first steel shape 10A, the second steel shape 10B, and the election piece 20 may be formed of aluminum, an aluminum alloy, or stainless steel. The brace 30, the leg 35, the first raw pipe 40 (the first bent steel plate 41, the second bent steel plate 42), the second raw pipe 45, the first bottom steel plate 50A, and the second bottom steel plate 50B in the second to fourth embodiments may also be formed of aluminum or an aluminum alloy.

[0055] (Appendix) (1) Aspect 1 of the present disclosure includes a first metal structural member, a second metal structural member, and an election piece formed in a plate shape and having a first insertion hole through which a crane lifting tool is inserted, and the election piece extends from the first metal structural member to the second metal structural member. Among the election pieces, one side portion in the longitudinal direction of the election piece is welded to the first metal structural member, and the other side portion of the election piece is welded to the second metal structural member.

[0056] In this disclosure, the election piece can be passed from the first metal structural member to the second metal structural member. By inserting the crane lifting tool into the first insertion hole of the election piece, the first metal structural member can be easily lifted via the election piece, and the election piece can also be used as another lifting tool.

[0057] (2)Aspect 2 of the present disclosure may be the structure according to (1), wherein the structure is an ocean structure or a river structure. In this disclosure, a structure with enhanced connection strength between a first metal structure member and a second metal structure member via an erection piece can be used for marine or river applications.

[0058] (3)Aspect 3 of the present disclosure may be the structure according to (1) or (2), wherein the first insertion hole is provided in the portion on one side. In this disclosure, for example, when a lifting tool is inserted into the first insertion hole of the erection piece to lift the erection piece, compared with the case where the first insertion hole is provided in the portion on the other side, the distance between the welded portion of the first metal structure member and the erection piece and the first insertion hole is close. Therefore, the stress acting on this welded portion can be reduced.

[0059] (4)Aspect 4 of the present disclosure may be the structure according to any one of (1) to (3), wherein the structure is a jacket-type structure, the first metal structure member is a brace, and the second metal structure member is a leg. In this disclosure, for a jacket-type structure including braces and legs, the connection strength between the braces and the legs via the erection piece can be enhanced. By inserting a lifting tool into the first insertion hole of the erection piece, the brace can be easily lifted via the erection piece. And this brace can be reliably connected to the leg.

[0060] (5)Aspect 5 of the present disclosure may be the structure according to (4), wherein the width of the portion on the other side along the short side direction orthogonal to the thickness direction of the erection piece is shorter than the width of the portion on one side along the short side direction of the erection piece. In this disclosure, for example, even when the diameter of a part of a leg, which is a second metal structural member welded to a part on the other side of the election piece, is larger than the diameter of a part of a brace, which is a first metal structural member welded to a part on one side of the election piece, the part of the leg and the part of the brace can be coaxially connected to each other.

[0061] (6) Aspect 6 of this disclosure is that the structure is a monopile structure, the first metal structural member is a first single pipe constituting the monopile structure, and the second metal structural member is a second single pipe constituting the monopile structure. The structure according to any one of (1) to (5) may be used. In this disclosure, for a monopile structure including a first single pipe and a second single pipe, the connection strength between the first single pipe and the second single pipe via the election piece can be increased.

[0062] (7) Aspect 7 of this disclosure is that the structure is a monopile structure, the first metal structural member is a first bent steel plate constituting the single pipe of the monopile structure, and the second metal structural member is a second bent steel plate constituting the single pipe. The structure according to any one of (1) to (5) may be used. In this disclosure, for a monopile structure including a first bent steel plate and a second bent steel plate constituting the single pipe, the connection strength between the first bent steel plate and the second bent steel plate via the election piece can be increased. And by inserting a lifting tool through the first insertion hole of the election piece, the first bent steel plate can be easily lifted via the election piece. And the first bent steel plate can be surely connected to the second bent steel plate.

[0063] (8) Aspect 8 of this disclosure is that the short side direction orthogonal to the thickness direction of the election piece substantially follows the normal direction of each of the first bent steel plate and the second bent steel plate. The structure according to (7) may be used. In this disclosure, an election piece can be reliably transferred from a first bent steel plate to a second bent steel plate. And the bending strength around the axis along the thickness direction in the election piece can be increased.

[0064] (9)Aspect 9 of this disclosure may be the structure according to any one of (1) to (8), wherein a second insertion hole is provided in the portion on the other side. In this disclosure, for example, after the election piece is welded to the second metal structure member, when two election pieces are welded to the structure, by inserting three suspenders into three of the first insertion holes and the second insertion holes provided in each of the two election pieces respectively to suspend the structure, compared with the case of suspending the structure by two suspenders, the structure can be suspended in a stable state.

[0065] (10)Aspect 10 of this disclosure may be the structure according to any one of (1) to (9), wherein the first metal structure member is the first bottom steel plate constituting the composite floor slab of the structure, and the second metal structure member is the second bottom steel plate constituting the composite floor slab. In this disclosure, for a structure including the first bottom steel plate and the second bottom steel plate constituting the composite floor slab, the connection strength between the first bottom steel plate and the second bottom steel plate via the election piece can be increased. By inserting a suspender into the first insertion hole of the election piece, the first bottom steel plate can be easily lifted via the election piece. And the first bottom steel plate can be reliably connected to the second bottom steel plate.

[0066] (11)Aspect 11 of this disclosure may be the structure according to any one of (1) to (10), wherein the first insertion hole is provided on the side opposite to the side of the first bottom steel plate in the short direction perpendicular to the thickness direction of the election piece. In this disclosure, it is possible to easily perform the hanging of the structure by inserting the suspender of the crane into the first insertion hole, and in this hanging, it is possible to easily perform the pulling for moving the structure in the longitudinal direction and the thickness direction by inserting a wire or the like into the first insertion hole.

[0067] (12) Aspect 12 of the present disclosure may be the structure according to any one of (1) to (11), wherein the first metal structure member and the second metal structure member include a section steel or a steel pipe. In this disclosure, the first metal structure member and the second metal structure member can be configured at a reduced manufacturing cost by using generally used members such as section steel or steel pipe.

[0068] (13) Aspect 13 of the present disclosure may be the structure according to any one of (2), (4) to (12), wherein the first insertion hole is provided in the portion on the other side. In this disclosure, when hanging the structure by inserting a lifting tool through the first insertion hole and performing pulling to move the structure by inserting a wire or the like through the first insertion hole, the operability of the structure can be improved. This is more suitable when the structure is relatively light.

[0069] (14) Aspect 14 of the present disclosure may be the structure according to any one of (1) to (13), wherein the length of the one side portion in the longitudinal direction of the erection piece is longer than the length of the other side portion in the longitudinal direction. In this disclosure, since the length of the one side portion welded to the first metal structure member among the erection pieces becomes longer, the one side portion in the erection piece can withstand a greater stress.

[0070] (15) Aspect 15 of the present disclosure is a method for constructing the structure according to any one of (1) to (14), including a first welding step of welding the one side portion to the first metal structure member, a lifting step of lifting the erection piece with a crane using the first insertion hole, and a second welding step of welding the other side portion to the second metal structure member after the lifting step.

[0071] In this disclosure, in the first welding step, a portion on one side of the erection piece is welded to the first metal structural member, and in the lifting step, the erection piece is lifted by a crane using the first insertion hole. Then, in the second welding step, a portion on the other side of the erection piece is welded to the second metal structural member, and the first metal structural member and the second metal structural member can be connected via the erection piece.

Explanation of Signs

[0072] 1, 2, 3, 4 Structures 4a Composite Floor Slab 10A First H-Beam (First Metal Structural Member, H-Beam) 10B Second H-Beam (Second Metal Structural Member, H-Beam) 20 Erection Piece 23 First Insertion Hole 24 Second Insertion Hole 30 Brace (First Metal Structural Member, Steel Pipe) 35 Leg (Second Metal Structural Member, Steel Pipe) 40 First Plain Pipe (First Metal Structural Member, Steel Pipe, Plain Pipe) 41 First Bent Steel Plate (First Metal Structural Member) 42 Second Bent Steel Plate (Second Metal Structural Member) 45 Second Plain Pipe (Second Metal Structural Member, Steel Pipe) 50A First Bottom Steel Plate (First Metal Structural Member) 50B Second Bottom Steel Plate (Second Metal Structural Member) 200 Hoisting Tool 201 Crane L1, L2 Width S1 Construction Method (Construction Method of Structure) S10 First Welding Step S11 Lifting Step S13 Second Welding Step X Thickness Direction Y Short Side Direction Z Long Side Direction Z1 One Side Z2 The Other Side

Claims

1. a first metal structural member; A second metal structural member; An erection piece formed in a plate shape, having a first insertion hole through which a hoisting tool of a crane is inserted, and extending from the first metal structural member to the second metal structural member; Equipped with Of the erection piece, one side portion in the longitudinal direction of the erection piece is welded to the first metal structural member, The other side portion of the erection piece is welded to the second metal structural member. A structure characterized by:

2. The structure is a marine structure or a river structure.

2. The structure of claim 1.

3. The first insertion hole is provided in the one side portion.

3. The structure of claim 2.

4. The structure is a jacketed structure, the first metal structural member is a brace; the second metal structural member is a leg; 4. The structure according to claim 3.

5. The width of the other side portion along the short side direction perpendicular to the thickness direction of the erection piece is shorter than the width of the one side portion along the short side direction of the erection piece.

5. The structure according to claim 4.

6. The structure is a monopile structure, the first metal structural member is a first blank tube constituting the monopile structure, the second metal structural member is a second blank tube constituting the monopile structure; 4. The structure according to claim 3.

7. The structure is a monopile structure, the first metal structural member is a first bent steel plate constituting a base tube of the monopile structure, the second metal structural member is a second bent steel plate constituting the mother tube; 4. The structure according to claim 3.

8. The short side direction perpendicular to the thickness direction of the erection piece is approximately along the normal direction of each of the first bent steel plate and the second bent steel plate, 8. The structure of claim 7.

9. A second insertion hole is provided in the other side portion.

8. The structure of claim 7.

10. The first metal structural member is a first bottom steel plate constituting a composite deck of the structure, The second metal structural member is a second bottom steel plate constituting the composite deck, 4. The structure according to claim 3.

11. The first insertion hole is provided on the side opposite to the first bottom steel plate in a short direction perpendicular to the thickness direction of the erection piece, 11. The structure of claim 10.

12. The first metal structural member and the second metal structural member include a steel section or a steel pipe. A structure according to any one of claims 1 to 3.

13. The first insertion hole is provided in the other side portion.

3. The structure of claim 2.

14. The length of the erection piece in the longitudinal direction and the length of the portion on one side are longer than the length of the portion on the other side in the longitudinal direction, A structure according to any one of claims 1 to 9.

15. A method for constructing a structure according to any one of claims 1 to 9, comprising the steps of: a first welding step of welding the one side portion to the first metallic structural member; A lifting step of lifting the erection piece with a crane using the first insertion hole; a second welding step of welding the other side portion to the second metal structural member after the lifting step; A method for constructing a structure, comprising:

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