Temporary connection method for steel pipe poles

Abstract

To provide a temporary connection method of steel pipe columns which can easily perform temporary connection of upper and lower steel pipe columns without causing cross-sectional loss in a steel pipe column and which leaves little remaining portion to be cut from a steel pipe column after a permanent connection is made.SOLUTION: A temporary connection method of steel pipe columns maintaining a relative position of a first steel pipe column to a second steel pipe column in advance when performing a permanent connection after plumbing the second steel pipe column on the first steel pipe column comprises: plumbing, on the first steel pipe column which has a threaded stud provided on an outer periphery of an upper end portion, the second steel pipe column which has a threaded stud provided on an outer periphery of a lower end portion at a position corresponding to the threaded stud of the first steel pipe column; arranging a connecting material which has bolt holes provided at a position corresponding to the threaded studs of the first steel pipe column and the second steel pipe column, on side surfaces of the first steel pipe column and the second steel pipe column so as to straddle the first steel pipe column and the second steel pipe column; and screwing a nut onto the threaded stud to frictionally join the connecting material, the first steel pipe column and the second steel pipe column.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a method for temporarily connecting steel pipe poles, in which the relative positions of the upper and lower steel pipe poles are maintained in advance when plumbing an upper steel pipe pole on top of a lower steel pipe pole and then permanently connecting the joints of the upper and lower steel pipe poles by welding. [Background technology]

[0002] In steel-framed structures, when the overall length of a steel pipe column is long, there are restrictions on the dimensions of the components that can be transported to the construction site. Therefore, the overall length of the steel pipe column is divided into multiple sections, and each section is fabricated at a steel frame factory, and the joints of the steel pipe columns at each section are welded together at the construction site.

[0003] When welding a joint between steel pipe columns made of square steel pipes, circular steel pipes, etc., if the upper and lower steel pipe columns are misaligned, this can lead to weld defects or additional bending due to the misalignment of the steel pipe columns after welding. For this reason, before permanently connecting the upper and lower steel pipe column joints by welding or the like, it is important to align the centers of the upper and lower steel pipe columns and temporarily connect them in this state so that the relative positions of the upper and lower steel pipe columns are maintained.

[0004] Figures 9 to 12 show a conventional method for temporarily connecting steel pipe poles. Figures 9 and 10 are a side view and a horizontal cross-sectional view, respectively, of a steel pipe pole 7 on the lower layer side and a steel pipe pole 8 on the upper layer side. Figures 11 and 12 are a side view and a horizontal cross-sectional view, respectively, showing a state in which the steel pipe pole 7 on the lower layer side and the steel pipe pole 8 on the upper layer side are temporarily connected.

[0005] As shown in Figures 9 to 12, to temporarily connect the upper and lower steel pipe columns 7, 8, steel plates called erection pieces 71, 81 are typically welded and installed on the outer periphery of the upper end of the lower steel pipe column 7 and the lower end of the upper steel pipe column 8 when the steel pipe columns 7, 8 are fabricated in a steel frame factory. At the construction site, the upper steel pipe column 8 is erected on the lower steel pipe column 7 so that the positions of the erection pieces 71, 81 of the lower steel pipe column 7 and the upper steel pipe column 8 are aligned. Then, splice plates 91 are attached to the erection pieces 71, 81 of the upper and lower steel pipe columns 7, 8 and friction-welded with bolts 92 and nuts 93, temporarily connecting the upper and lower steel pipe columns 7, 8. Furthermore, in this state, the joints of the upper and lower steel pipe columns 7, 8 are welded to complete the final connection. After the final connection is completed, the erection pieces 71, 81 remaining on the outer periphery of the steel pipe columns 7, 8 are cut off by gas cutting or the like.

[0006] In Patent Document 1, the upper end of the steel pipe column on the lower layer side and the lower end of the steel pipe column on the upper layer side are clamped and pressed from both sides with a pair of semi-cylindrical jigs, and the jigs are tightened to the base part of the erection piece with bolts to align the upper and lower steel pipe columns.

[0007] In Patent Document 2, a plumbing jig is attached to an erection piece erected on the outer periphery of the upper end of the steel pipe column on the lower floor and the lower end of the steel pipe column on the upper floor, and the upper and lower steel pipe columns are aligned by adjusting the amount of screwing of the position adjustment bolt of the plumbing jig.

[0008] In Patent Document 3, an erection piece with a T-shaped cross section is bolted to the upper end of the steel pipe column on the lower floor side and the lower end of the steel pipe column on the upper floor side, making the erection piece detachable. In addition, by staggering the bolt holes provided in the steel pipe column to join the erection piece, stress concentration near the bolt holes of the steel pipe column is suppressed. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] Patent No. 7090787 [Patent Document 2] Japanese Patent Publication No. 2022-159247 [Patent Document 3] Japanese Patent Application Publication No. 2018-025050 Summary of the Invention [Problem to be solved by the invention]

[0010] However, in the techniques described in Patent Documents 1 and 2, when manufacturing a steel pipe column at a steel frame factory, a separate erection piece must be manufactured and welded to the end of the steel pipe column, or after the upper and lower steel pipe columns are finally connected at the construction site, the erection piece must be removed from the steel pipe column by gas cutting or the like. This still requires time and effort.

[0011] In addition, in the technology described in Patent Document 3, since the erection piece is attached to the steel pipe column by bolting, the erection piece can be easily removed from the steel pipe column after the upper and lower steel pipe columns are fully connected at the construction site. However, even if the bolt holes provided in the steel pipe column to bolt the erection piece are arranged in a staggered pattern, it is inevitable that the effective cross section of the steel pipe column will be reduced due to cross-sectional loss caused by the bolt holes, which is disadvantageous in terms of structural design.

[0012] The present invention aims to provide a method for temporarily connecting steel pipe poles, which can easily perform temporary connection of upper and lower steel pipe poles when plumbing an upper steel pipe pole onto a lower steel pipe pole to make a permanent connection without causing cross-sectional loss in the steel pipe pole, and which leaves little remaining portion to be cut from the steel pipe pole after the permanent connection. [Means for solving the problem]

[0013] In order to solve the above problems, the present invention has the following features.

[0014] [1] A method for temporarily connecting steel pipe poles, which, when making a permanent connection after plumbing a second steel pipe pole on top of a first steel pipe pole, maintains the relative positions of the first steel pipe pole and the second steel pipe pole in advance, comprises plumbing the second steel pipe pole, which has threaded studs on the outer periphery of its lower end, on top of the first steel pipe pole, which has threaded studs on the outer periphery of its upper end, at positions corresponding to the threaded studs of the first steel pipe pole, and arranging connecting members, which have bolt holes provided on the side surfaces of the first steel pipe pole and the second steel pipe pole, so as to straddle the first steel pipe pole and the second steel pipe pole, and screwing nuts onto the threaded studs to frictionally join the connecting members to the first steel pipe pole and the second steel pipe pole.

[0015] [2] A method for temporarily connecting steel pipe poles as described in [1], wherein the slip strength of the friction joint and the yield strength of the connecting material are greater than the weight of the second steel pipe pole.

[0016] [3] A method for temporarily connecting steel pipe columns according to [1] or [2], wherein the cross-sectional shape of the connecting member is rectangular, L-shaped or T-shaped.

[0017] [4] A method for temporarily connecting steel pipe poles according to any one of [1] to [3], wherein the threaded studs provided on the outer periphery of the upper end of the first steel pipe pole and the outer periphery of the lower end of the second steel pipe pole are provided at three or more positions at intervals of less than 180° around the central axes of the first steel pipe pole and the second steel pipe pole.

[0018] [5] A method for temporarily connecting steel pipe poles described in any one of [1] to [4], wherein the first steel pipe pole and the second steel pipe pole are transported to a construction site with the threaded stud pre-attached to each of the first steel pipe pole and the second steel pipe pole. [Effects of the Invention]

[0019] The temporary connection method for steel pipe poles according to the present invention uses a first steel pipe pole having a threaded stud on the outer periphery of its upper end, and a second steel pipe pole having a threaded stud on the outer periphery of its lower end at a position corresponding to the threaded stud on the first steel pipe pole.

[0020] In conventional techniques using erection pieces, when steel pipe columns are manufactured at steel frame factories, erection pieces are separately manufactured in a predetermined shape and welded to the end of the steel pipe column, or the erection pieces remaining on the steel pipe column after the permanent connection at the construction site are cut off by gas cutting or the like, which is time-consuming. In contrast, in the temporary connection method for steel pipe columns of the present invention, pre-made threaded studs can be used, so there is almost no time required to process the threaded studs themselves. In addition, the time required to weld threaded studs to the outer periphery of the first and second steel pipe columns used in the present invention is very small compared to the time required to weld erection pieces to the outer periphery of the steel pipe column in the conventional technology. In addition, in the temporary connection method for steel pipe columns of the present invention, the time required to cut off the threaded studs remaining on the first and second steel pipe columns after the permanent connection is also very small compared to the time required to cut off the erection pieces remaining on the steel pipe column in the conventional technology.

[0021] Furthermore, in the conventional technology of attaching an erection piece to a steel pipe column by bolt fastening, the bolt holes provided in the steel pipe column to connect the erection piece cause a cross-sectional loss in the steel pipe column, reducing the effective cross-section of the steel pipe column, which is disadvantageous in terms of structural design. In contrast, the temporary connection method for steel pipe columns of the present invention does not require bolt holes to be provided in the steel pipe column, so the effective cross-section of the steel pipe column is not impaired and the strength of the steel pipe column can be effectively utilized. [Brief explanation of the drawings]

[0022] [Figure 1] FIG. 1 is a side view showing a first steel pipe pole, a second steel pipe pole, and a connecting member in one embodiment of the method for temporarily connecting steel pipe poles of the present invention. [Figure 2] FIG. 2 is a horizontal cross-sectional view showing a first steel pipe pole and a second steel pipe pole in one embodiment of the method for temporarily connecting steel pipe poles of the present invention. [Figure 3] FIG. 3 is a side view showing a state in which a first steel pipe pole and a second steel pipe pole are temporarily connected in one embodiment of the method for temporarily connecting steel pipe poles of the present invention. [Figure 4] FIG. 4 is a horizontal cross-sectional view showing a state in which a first steel pipe pole and a second steel pipe pole are temporarily connected in one embodiment of the method for temporarily connecting steel pipe poles of the present invention. [Figure 5] FIG. 5 is a side view showing a state in which a first steel pipe pole and a second steel pipe pole are temporarily connected in another embodiment of the method for temporarily connecting steel pipe poles of the present invention. [Figure 6] FIG. 6 is a horizontal cross-sectional view showing a state in which a first steel pipe pole and a second steel pipe pole are temporarily connected in another embodiment of the method for temporarily connecting steel pipe poles of the present invention. [Figure 7] FIG. 7 is a side view showing a state in which a first steel pipe pole and a second steel pipe pole are temporarily connected in still another embodiment of the method for temporarily connecting steel pipe poles of the present invention. [Figure 8] FIG. 8 is a horizontal cross-sectional view showing a state in which a first steel pipe pole and a second steel pipe pole are temporarily connected in still another embodiment of the method for temporarily connecting steel pipe poles of the present invention. [Figure 9] FIG. 9 is a side view showing a steel pipe pole on a lower layer side and a steel pipe pole on an upper layer side in a conventional method for temporarily connecting steel pipe poles. [Figure 10] FIG. 10 is a horizontal cross-sectional view showing a steel pipe pole on a lower story side and a steel pipe pole on an upper story side in a conventional method for temporarily connecting steel pipe poles. [Figure 11] FIG. 11 is a side view showing a state in which a steel pipe pole on a lower story side and a steel pipe pole on an upper story side are temporarily connected in a conventional method for temporarily connecting steel pipe poles. [Figure 12] FIG. 12 is a horizontal cross-sectional view showing a state in which a steel pipe pole on a lower story side and a steel pipe pole on an upper story side are temporarily connected in a conventional method for temporarily connecting steel pipe poles. DETAILED DESCRIPTION OF THE INVENTION

[0023] Hereinafter, with reference to the drawings, an embodiment of the steel pipe pole temporary connection method of the present invention will be described in detail.

[0024] Figures 1 and 2 show a side view and a horizontal cross-sectional view, respectively, of a first steel pipe pole 1A, a second steel pipe pole 2A, and a connecting material 3A in one embodiment of the method for temporarily connecting steel pipe poles of the present invention. Figures 3 and 4 show a side view and a horizontal cross-sectional view, respectively, of a state in which the first steel pipe pole 1A and the second steel pipe pole 2A are temporarily connected in this embodiment.

[0025] As shown in Figures 1 to 4, the method for temporary connection of steel pipe poles of this embodiment involves plumbing a second steel pipe pole 2A onto a first steel pipe pole 1A, and then welding a joint between the first steel pipe pole 1A and the second steel pipe pole 2A to perform a final connection, by previously maintaining the relative positions of the first steel pipe pole 1A and the second steel pipe pole 2A. By previously maintaining the relative positions of the first steel pipe pole 1A and the second steel pipe pole 2A, welding of a joint for permanently connecting the first steel pipe pole 1A and the second steel pipe pole 2A can be stably performed. In this embodiment, a case will be described in which the first steel pipe pole 1A and the second steel pipe pole 2A are made of square steel pipes.

[0026] 1 and 2, a plurality of threaded studs 11 are welded at predetermined intervals to the outer periphery of the upper end of the first steel pipe pole 1A, which will be located on the lower story side of the joint. Similarly, a plurality of threaded studs 11 are welded at predetermined intervals to the outer periphery of the lower end of the second steel pipe pole 2A, which will be located on the upper story side of the joint, at positions corresponding to the threaded studs 11 of the first steel pipe pole 1A.

[0027] Specifically, the threaded studs 11, 21 provided on the outer periphery of the upper end of the first steel pipe column 1A and the outer periphery of the lower end of the second steel pipe column 2A are provided on the four side surfaces of the first steel pipe column 1A and the second steel pipe column 2A, i.e., at four positions spaced 90° apart around the central axis, five of each along the material axis direction of the steel pipe columns.

[0028] 3 and 4, a second steel pipe pole 2A is plumbed onto the first steel pipe pole 1A, and a connecting member 3A is disposed on each of the four side surfaces of the first steel pipe pole 1A and the second steel pipe pole 2A so as to straddle the first steel pipe pole 1A and the second steel pipe pole 2A. In this embodiment, a steel plate having a flat rectangular cross-sectional shape is used as the connecting member 3A.

[0029] As shown in Fig. 1, the connecting member 3A has bolt holes 31 formed at positions corresponding to the threaded studs 11, 21 of the first steel pipe pole 1A and the second steel pipe pole 2A. The threaded studs 11, 21 of the first steel pipe pole 1A and the second steel pipe pole 2A are inserted into the bolt holes 31 of the connecting member 3A, and nuts 4 are screwed onto the threaded studs 11, 21 to frictionally join the connecting member 3A to the first steel pipe pole 1A and the second steel pipe pole 2A.

[0030] The steel material constituting the threaded studs 11, 21 and the steel material constituting the connecting material 3A do not necessarily have to be the same type as the steel material constituting the first steel pipe column 1A and the second steel pipe column 2A, and can be selected appropriately depending on the force acting on the joint between the first steel pipe column 1A and the second steel pipe column 2A during erection.

[0031] However, it is preferable that the slip resistance of the friction joint formed by fastening the connecting members 3A to the threaded studs 11, 21 of the first steel pipe column 1A and the second steel pipe column 2A with nuts 4 and the yield strength of the connecting members 3A be greater than the weight of the second steel pipe column 2A. In other words, it is preferable to set the diameter, arrangement, and material of the threaded studs 11, 21, and the shape, material, etc. of the connecting members 3A so as to satisfy the following formula (1):

[0032] N c ≦min(P s1 , P s2 , P s3 ) …(1) However, in equation (1), N c (N) is the weight of the second steel pipe column 2A. s1(N) is the total slip resistance of the friction joint between the first steel pipe column 1A and the connecting members 3A, which are formed by fastening four connecting members 3A to the threaded stud 11 of the first steel pipe column 1A with nuts 4. Similarly, P s2 (N) is the total slip resistance of the friction joint between the second steel pipe column 2A and the connecting members 3A, which are fastened to the threaded studs 21 of the second steel pipe column 2A with nuts 4. Also, P s3 (N) is the yield strength of the connector 3A.

[0033] In this way, slippage at the friction joints between the first steel pipe column 1A and the second steel pipe column 2A and the connecting material 3A, and yielding of the connecting material 3A are reliably prevented, so that the second steel pipe column 2A erected on top of the first steel pipe column does not tilt. Therefore, welding of a joint for permanently connecting the first steel pipe column 1A and the second steel pipe column 2A can be stably carried out in a state where the relative positions of the first steel pipe column 1A and the second steel pipe column 2A are stably maintained.

[0034] When welding a joint to permanently connect a first steel pipe column 1A and a second steel pipe column 2A, the portions not covered by the connecting material 3A are first welded. At this point, the portions corresponding to the width of the connecting material 3A remain unwelded. Next, the connecting material 3A is removed from the first steel pipe column 1A and the second steel pipe column 2A to expose the portions that remain unwelded, and this remaining portion is welded.

[0035] In this way, at the time when the connecting material 3A is removed from the first steel pipe pole 1A and the second steel pipe pole 2A, welding has been completed only in the parts that were not covered by the connecting material 3A, and the second steel pipe pole 2A is held by this partial welding. Therefore, it is preferable to limit the width of the connecting material 3A to a size such that the part that remains unwelded at the time when the connecting material 3A is removed from the first steel pipe pole 1A and the second steel pipe pole 2A is not excessively large and the second steel pipe pole 2A can be stably held.

[0036] Furthermore, as described above, in the present embodiment, the threaded studs 11, 21 provided on the outer periphery of the upper end of the first steel pipe pole 1A and the outer periphery of the lower end of the second steel pipe pole 2A are provided at four locations at 90° intervals around the central axes of the first steel pipe pole 1A and the second steel pipe pole 2A. Thus, in the method for temporary connection of steel pipe poles according to the present invention, the threaded studs 11, 21 provided on the outer periphery of the upper end of the first steel pipe pole 1A and the outer periphery of the lower end of the second steel pipe pole 2A are preferably provided at three or more locations at intervals of less than 180° around the central axes of the first steel pipe pole 1A and the second steel pipe pole 2A.

[0037] In this way, the positions at which the first steel pipe pole 1A and the second steel pipe pole 2A and the connecting material 3A are friction-joined do not deviate to one side with respect to the central axes of the first steel pipe pole 1A and the second steel pipe pole 2A. Therefore, welding of a joint for permanently connecting the first steel pipe pole 1A and the second steel pipe pole 2A can be stably performed in a state in which the relative positions of the first steel pipe pole 1A and the second steel pipe pole 2A are stably maintained.

[0038] It is preferable that the first steel pipe column 1A and the second steel pipe column 2A are manufactured in a steel frame factory so that the threaded studs 11, 21 are pre-attached, and then transported to the construction site.

[0039] Figures 5 and 6 respectively show a side view and a horizontal cross-sectional view of a first steel pipe column 1A and a second steel pipe column 2A, and a connecting material 3B, in a state in which the first steel pipe column 1A and the second steel pipe column 2A are temporarily connected, in another embodiment of the method for temporarily connecting steel pipe columns of the present invention.

[0040] As shown in Figures 5 and 6, in this embodiment, the first steel pipe column 1A and the second steel pipe column 2A are similar to those described in the above embodiment, but differ in that angle irons having an L-shaped cross-sectional shape are used as the connecting members 3B.

[0041] As shown in Fig. 5, the connecting material 3B has a scallop 32 provided on one side of its cross section in the central part in the material axis direction. This is preferable because when the connecting material 3B is arranged on the side surfaces of the first steel pipe column 1A and the second steel pipe column 2A, the area covered by the connecting material 3B can be minimized, and the area that remains unwelded when the connecting material 3B is removed can be minimized.

[0042] Figures 7 and 8 respectively show a side view and a horizontal cross-sectional view of a first steel pipe column 1B and a second steel pipe column 2B, and a connecting material 3C, in a state in which the first steel pipe column 1B and the second steel pipe column 2B are temporarily connected, in yet another embodiment of the method for temporarily connecting steel pipe columns of the present invention.

[0043] 7 and 8, in this embodiment, the first steel pipe pole 1B, the second steel pipe pole 2B, and the connecting material 3C are all different from those described in the above embodiments. Specifically, the threaded studs 11, 21 provided on the outer periphery of the upper end of the first steel pipe pole 1B and the outer periphery of the lower end of the second steel pipe pole 2B are provided on each of the four side surfaces of the first steel pipe pole 1B and the second steel pipe pole 2B in two rows along the material axis direction of the steel pipe poles, with five studs in each row.

[0044] Furthermore, a T-shaped steel beam having a T-shaped cross section is used as the connecting member 3C. The connecting member 3C has two rows of bolt holes (not shown) at positions corresponding to the two rows of threaded studs 11, 21 of the first steel pipe column 1A and the second steel pipe column 2A.

[0045] As shown in Figure 7, similar to the connecting member 3B of the above embodiment, the connecting member 3C has scallops 32 on both sides of its flange in the central portion in the material axis direction. This is preferable because when the connecting member 3C is disposed on the side surfaces of the first steel pipe column 1B and the second steel pipe column 2B, the area covered by the connecting member 3C can be minimized, and the area remaining unwelded at the time of removing the connecting member 3C can be minimized. Furthermore, compared to the above embodiment using the connecting member 3B, the relative position of the first steel pipe column 1B and the second steel pipe column 2B can be more stably maintained, and welding of the joint for permanently connecting the first steel pipe column 1B and the second steel pipe column 2B can be stably performed.

[0046] According to the method for temporarily connecting steel pipe poles of each of the above embodiments, a first steel pipe pole 1A, 1B having a threaded stud 11 provided on the outer periphery of the upper end, and a second steel pipe pole 2A, 2B having a threaded stud 21 provided on the outer periphery of the lower end at a position corresponding to the threaded stud 11 of the first steel pipe pole 1A, 1B are used.

[0047] In conventional techniques using erection pieces, when steel pipe columns are manufactured at steel frame factories, erection pieces are separately manufactured in a predetermined shape and welded to the end of the steel pipe column, or the erection pieces remaining on the steel pipe column after the steel pipe column is permanently connected at the construction site are removed by gas cutting or the like, which requires a lot of work. In contrast, in the temporary connection method for steel pipe columns of each of the above embodiments, pre-made threaded studs 11, 21 can be used, so there is almost no work required to process the threaded studs 11, 21 themselves. In addition, the work required to weld the threaded studs 11, 21 to the outer periphery of the first steel pipe columns 1A, 1B and the second steel pipe columns 2A, 2B used in each of the above embodiments is much less than the work required to weld erection pieces to the outer periphery of the steel pipe column in the conventional technology. Furthermore, in the temporary connection method for steel pipe poles of each of the above embodiments, the effort required to cut off the threaded studs 11, 21 remaining on the first steel pipe poles 1A, 1B and the second steel pipe poles 2A, 2B after the permanent connection is made is also very small compared to the effort required to cut off the erection pieces remaining on the steel pipe poles in the prior art.

[0048] Furthermore, in the conventional technology of attaching an erection piece to a steel pipe column by bolt fastening, the bolt holes provided in the steel pipe column to connect the erection piece cause a cross-sectional loss in the steel pipe column, reducing the effective cross-section of the steel pipe column, which is disadvantageous in terms of structural design. In contrast, in the steel pipe column temporary connection method of each of the above embodiments, there is no need to provide bolt holes in the first steel pipe columns 1A, 1B and the second steel pipe columns 2A, 2B, so the effective cross-section of the steel pipe column is not impaired and the strength of the steel pipe column can be effectively utilized.

[0049] In the above embodiment, the first steel pipe poles 1A, 1B and the second steel pipe poles 2A, 2B are described as being made of square steel pipes, but the method for temporary connection of steel pipe poles of the present invention can also be applied to cases where the first steel pipe pole and the second steel pipe pole are made of circular steel pipes, four-sided welded square steel pipe poles, etc. Furthermore, the first steel pipe pole and the second steel pipe pole may be filled with concrete to form concrete-filled steel pipe poles. [Explanation of symbols]

[0050] 1A, 1B First steel pipe column 11 Threaded Stud 2A, 2B Second steel pipe column 21 Threaded Stud 3A~3C Connectors 31 Bolt holes 32 Scallop 4 nuts 7, 8 Steel pipe column 71, 81 Erection Piece 91 Splice 92 volts 93 Nut

Claims

1. A method for temporarily connecting steel pipe poles, in which the relative positions of the first steel pipe pole and the second steel pipe pole are maintained in advance when a second steel pipe pole is plumbed onto a first steel pipe pole and then finally connected, Plumbing the second steel pipe pole, which has threaded studs on the outer periphery of its lower end at positions corresponding to the threaded studs on the first steel pipe pole, onto the first steel pipe pole, which has threaded studs on the outer periphery of its upper end, Connecting members having bolt holes at positions corresponding to the threaded studs of the first steel pipe column and the second steel pipe column are arranged on the side surfaces of the first steel pipe column and the second steel pipe column so as to straddle the first steel pipe column and the second steel pipe column, A method for temporarily connecting steel pipe poles, comprising screwing a nut onto the threaded stud to frictionally join the connecting material, the first steel pipe pole, and the second steel pipe pole.

2. The method for temporarily connecting steel pipe poles according to claim 1, wherein the slip strength of the friction joint and the yield strength of the connecting material are greater than the weight of the second steel pipe pole.

3. The method for temporarily connecting a steel pipe column according to claim 1 or 2, wherein the cross-sectional shape of the connecting material is rectangular, L-shaped, or T-shaped.

4. 3. The method for temporary connection of steel pipe poles according to claim 1 or 2, wherein the threaded studs provided on the outer periphery of the upper end of the first steel pipe pole and the outer periphery of the lower end of the second steel pipe pole are provided at three or more positions at intervals of less than 180° around the central axes of the first steel pipe pole and the second steel pipe pole.

5. 3. The method for temporarily connecting steel pipe poles according to claim 1 or 2, wherein the first steel pipe pole and the second steel pipe pole are transported to a construction site with the threaded stud pre-attached to each of the first steel pipe pole and the second steel pipe pole.

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