JPH0447049A - Column splicing method for steel pipe column - Google Patents

Abstract

PURPOSE:To enhance an efficiency in splicing columns to a great extent by setting a column splicing reference line at the ends of pipes in advance, mutually butting the ends of a prior and a posterior pipe which are provided with the specified number of joining through holes, and thereby concurrently attaching joining splice plates closely thereon so as to be fitted together. CONSTITUTION:Both each inner plate 10 and each outer plate 11 and each splice plate 9a through 9d are attached onto each pipe end 1a and 2a of a prior and a posterior steel pipe column 1 and 2 wherein the inner and the outer plate are composed of 2 rectangular splice plates 9 same in size and opposite to but parallel with each other, and each splice plate is composed of a bridge section 12 which bridges the opposite center sections of the inner plate 10 and the outer plate 11 so as to be connected. In this case, the prior steel pipe column 1 is threadedly connected to the splice plates 9a through 9d with hexagon headed bolts 20, and the posterior steel pipe column 2 is threadedly connected to the splice plates 9a through 9d with blind bolts 14. By this constitution, the columns can thereby be easily spliced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for connecting steel pipe columns used structurally in various industries, and particularly to steel pipe columns used in the fields of civil engineering, architecture, and marine structures.

[Conventional technology]

Currently, square steel pipes, round steel pipes, or deformed steel pipes are widely used for steel pipe columns in various industrial fields, especially in the fields of civil engineering, architecture, and marine structures, due to their excellent mechanical strength and high mechanical reliability. Various methods are used to connect these steel pipe columns, such as the usual welding method or the bolt tightening method using flanges attached to the pipe ends. As is well known, with the development of automatic tube end processing methods and welding methods for steel pipes, welding methods, including factory and on-site processing, have come to be widely used for interconnecting steel pipe columns.

[Problem to be solved by the invention]

For joining columns of steel pipe columns, the welding method not only requires a skilled welder, but especially on-site welding requires a large amount of equipment and work costs, and in addition to heat treatment, weld inspection is required. There is a problem in that the cost increases. These issues become especially noticeable when steel pipes have large diameters and thick walls, and when work is required at heights or in harsh environments.

On the other hand, the connecting column method, in which a flange fixed to the tube end is bolted, requires a great deal of expense for pre-processing the tube end, and there are problems in that the strength of the joint is likely to be unstable.

The inventors of the present invention, who have been engaged in the business of connecting columns for steel pipe columns for a long period of time, have researched an economical bolt connection as an alternative to welding, and have found the following problems.

FIG. 8 shows a situation in which the leading and trailing steel pipe columns 1 and 2 are joined together by abutting their respective pipe ends 1a and 2a. Leading and trailing steel pipe columns 1 and 2 are damaged due to cracks and unevenness left during cutting, shape defects and morphological distortions due to various causes after manufacturing, and shape changes due to improper handling during transportation, etc. When the long axes 3a, 3b of the tubes are aligned with the vertical line 4, the tube ends 1a, 2
a may not be horizontal, or may not be able to make close contact due to cracks or unevenness, so there is a gap 5 between the tube ends 1a and 2a.
often occurs.

In the present invention, butting means, as described above, the tube end 1a,
This refers to a state in which the two parts approach each other and partially touch each other, or they face each other in a very close positional relationship of about 5 to 154 degrees.

In addition, in FIG. 8, the gap 5 is drawn in a slightly exaggerated manner for convenience of explanation.

In this way, the present inventor learned that when connecting the leading and trailing steel pipe columns 1 and 2 using joint joint plates, a gap 5 is inevitably generated due to current metallurgy, pipe manufacturing, and transportation technology. etc., a joint column reference line is set in advance at the pipe end, and the pipe ends of leading and trailing steel pipe columns that have a predetermined number of connecting through holes drilled at set intervals based on the joint column reference line are butted against each other. With,
The present invention has invented a method for joining a steel pipe column, in which a plurality of joining joint plates each having bolt through holes that match the joining through holes of the pipe ends are brought into close contact with the pipe ends, and are joined with blind bolts.

Fig. 9(a) shows that the connecting column reference line Fl+F2 is set perpendicular to the respective axes of the leading and trailing steel pipe columns 1 and 2, and the strength is determined from preliminary strength design using the connecting column reference line FI+Ft as a reference. a predetermined number of codes 6a at set intervals.

9(b) shows a joint joint plate 8 provided with a bolt through hole represented by the reference numeral 7 that matches the joining through hole, and FIG. If the diameter lines 51 to S of the joining through holes 6a and 6b and the bolt through hole 7 are aligned with the latitude lines t and t6, accurate and quick blind bolt joining can be performed.

In such a joint, two joint plates of the same shape are brought into close contact with the inside and outside of the steel pipe, aligned, and then a blind bolt is inserted, but in this case, a considerable amount of manpower is required to hold and align the two joint plates. It was found that improving workability was an issue.

The purpose of the present invention is to eliminate the need for precise pipe end machining for the joint column by using a functional joint joint plate, to facilitate the work of the joint column, and to improve the reliability of the mechanical strength of the joint column. high,
In particular, the object of the present invention is to provide a method for connecting steel pipe columns that can be expected to be extremely economical because on-site work can be carried out efficiently.

[Means to solve the problem]

The gist of the present invention is to set a joint column reference line at the end of the pre-warped pipe, and to insert a predetermined number of joint through holes drilled at set intervals based on the joint column reference line into the pipes of the leading and trailing steel pipe columns. a plurality of joining joint plates having bolt through holes matching the joining through holes of the pipe ends are brought into close contact with the pipe ends, and the ends are butted together;
A method for joining steel pipe columns with bolts, in which rectangular joint plates of the same shape having a predetermined number of bolt through holes drilled at matching intervals are connected to each other via a bridge portion in the center of the joint plates. Using joint joint plates connected in parallel to each other, the joint joint plates are straddled over the leading steel pipe column, the trailing steel pipe column, or the pipe ends of the leading and trailing steel pipe columns, and then the connecting joint plates are connected to the leading steel pipe column, the trailing steel pipe column, or the pipe ends of the leading and trailing steel pipe columns. After bolt-joining the leading and trailing steel pipe columns and the joining joint plate, insert the pipe end of the leading or trailing steel pipe pillar into the fitting gap of the joining joint plate, and align the joining through-hole and the bolt through-hole. This method is then used to bolt the leading or trailing steel pipe pillar and the connecting joint plate using blind bolts.

[For production]

In the present invention, when connecting steel pipe columns, the first step is to
A connecting column reference line is set at the pipe end of the trailing steel pipe column, and a predetermined number of joint through holes are drilled at set intervals based on the connecting column reference line so as to have the design strength. This is a method in which the pipe ends of the trailing steel pipe columns are abutted against each other, and a plurality of joining joint plates each having bolt through holes that match the joining through holes of the pipe ends are brought into contact with the pipe ends, and the bolts are joined. , a steel pipe column whose end surface is not necessarily orthogonal to the long axis,
In other words, even if the leading and trailing steel pipe columns are made of steel pipe columns that do not have a dimensionally precise form, it is possible to easily perform jointing work and construct steel pipe columns that are structurally reliable. It is possible.

Furthermore, the work is simple and safe because the connecting pole work is done by bolt connection, there is no need for skilled labor, and the connecting pole work can be carried out in a short period of time.

Then, as a joint joint plate, a joint joint plate is prepared in which rectangular joint plates of the same shape each having a predetermined number of bolt through holes drilled at suitable intervals are connected in parallel to each other via a bridge section at the center of the opposite sides. Since we adopt a method in which the joint joint plate is manufactured in advance and then straddled over the pipe end of the preceding steel pipe column during joint column work, the position of the joint joint plate is easy to set, and the installation position can be maintained stably. is extremely simple and has high work efficiency.

Next, after bolting the preceding steel pipe column and joint plate,
Insert the pipe end of the trailing steel pipe column into the fitting gap of the joint joint plate, align the joint through hole and the bolt through hole, and then tighten the bolts between the trailing steel pipe column and the joint joint plate using blind bolts. This method makes it easy to work on connecting columns, eliminates the need for skilled workers, and enables highly efficient work on connecting columns with high structural strength and excellent reliability.

〔Example〕

Hereinafter, the present invention will be explained in more detail with reference to the drawings.

Figures 1.0 (a), fb), and (C) are a front view, an A-A vertical cross-sectional view, and a plan view of the joining joint plate 9 used in the present invention,
FIG. 11 is a schematic perspective view of the joining joint plate 9. The joining seam plate 9 includes an inner plate 10 and an outer plate 11, which are made up of two rectangular seam plates of the same shape and facing each other in parallel, and a bridging portion 12 that bridges the facing central parts of the inner plate 10 and the outer plate 11. configured,
Furthermore, the inner plate 101 and the outer plate 1 are provided with a reference numeral 13a.

A predetermined number of bolt through holes represented by 13b are bored. In addition, the upper part 10a of the inner plate 1O2 and the outer plate 11, lla
and the lower part 10b, 1], b are leading and trailing steel pipe columns 1,
In order to facilitate fitting and insertion with 2.

FIG. 12 is a schematic perspective view showing a situation in which the joining joint plates 9a to 9d are straddled over the tube end 1a of the preceding steel pipe column 1 made of a square steel pipe, and are screwed together with blind bolts 14. In this way, the bridge portion 12a is connected to the pipe end 1 of the preceding steel pipe column 1.
In the present invention, the act of fitting and inserting the joining joint plate 9a until it comes into contact with or approaches a is called straddling in the present invention. In other words, based on the positional relationship between the joint through holes drilled at set intervals based on the joint column reference line and the bolt through holes of the joint joint plate 9a, the bridge portion 12a corresponds to the pipe end 1a of the preceding steel pipe column l. Because there are cases where they touch each other and cases where they do not, straddling is used in a broad sense to include both.

Next, regarding the blind bolt 14, it is possible to use a well-known blind bolt 14 as shown in the schematic structural diagram of FIG. 13. The blind bolt 14 shown in FIG. 13 is constructed with a pin 15 and a suppression sleeve 16 movably loosely attached to the pin 15 as main members. In the figure, 17 and 18 are the pinchill and head of the pin 15, and 19 is the bottom of the pressing sleeve 16.

As mentioned above, the joining joint plate 9 is straddled over the preceding steel pipe column l,
Bolt through holes 13 in inner plate 1O and outer plate 11 and preceding steel pipe column 1
alignment with the joining through hole 6, and then insert the blind bolt 1.
4 is inserted and tightened, but since the tightening procedure is well known, the explanation will be omitted.

In the example shown in FIG. 12, blind bolts 14 are used to screw the joining joint plate 9 onto the preceding steel pipe column l, but Torsha bolts or hexagonal bolts may be used as long as the work is possible.

Next, FIG. 1 shows that in the present invention, leading and trailing steel pipe columns 1 and 2 are connected using joint joint plates 9a to 9d (9c is not shown for convenience) as pillar materials of a structure, for example, a building. In this example, hexagonal bolts 20 are used for the leading steel pipe column 1 and the joint joint plates 9a to 9d, and blind bolts 14 are used for the trailing steel pipe column 2 and the joint joint plates 9a to 9d. It is screwed using.

As is clear from FIG. 1, the joining seam plate 9b.

Leading and trailing steel pipe columns 1 are connected by bridge parts 12b and 12d of 9d.
．． There is a gap 5 between the two, or even if there is a gap 5 as a pillar of a building, there is no question to answer from a mechanical point of view.

However, if it is desired to close the gap 5, a suitable closing material such as a metal tape such as a stainless steel tape is used to close the gap.

Next, FIGS. 2 and 3 are views A-A and B in FIG. 1.
-B is a sectional view, and the same reference numerals as in FIG. 1 and FIGS. 1-12 are the same members.

Here, an example in which the hexagonal bolt 20 is used for screwing has been described, but in the present invention, it is more efficient to use the blind bolt 14 and is more reliable from a design standpoint.

FIG. 4 shows a situation in which joining joint plates 9e to 9h and 9a to 9d are screwed to the upper and lower pipe ends of the trailing steel pipe column 2, respectively. As described above, in the present invention, the joint plate 9 is attached to either the pipe end of the leading or trailing steel pipe column 1 or 2, or to the leading or trailing steel pipe column 1.
, 2 may be screwed onto both pipe ends if it is convenient for the work.

In other words, for the screwing work of the joining joint plate 9, either method is selected in consideration of work efficiency, but it is more labor-saving to use the factory or on-site work floor as much as possible and avoid work at high places such as at the joint pole site. This invention is advantageous in terms of shortening the work period, and in addition to increasing work efficiency, the present invention has a significant advantage in that it expands the options for connecting column work.

Next, Fig. 5(a), (b), (C) to Fig. 7(a)
, (b), and (C) are a front view, a vertical cross-sectional view taken along line A-A, and a plan view, respectively, showing other examples of the joining joint plate 9. The bridge portion 12i of the joint joint plate 91 in FIG. 5 is an example designed to have a narrow width, and the joint joint plate 9j in FIG. 6 is an example having bridge portions 12j+ and 12j2 separated at both ends. Inner plate 10 and outer plate 1 are attached to joint joint plate 9 in Fig. 7, respectively.
1 with a small rectangular metal piece, welding the central ends of 1 to form a bridge part 12k.
This is an example in which 2 is set for 1 and 12.

In this way, the bridge portion 12 of the joining seam plate 9 in the present invention
In the work of straddling the joining joint plate 9, the inner plate 10. After holding the outer plate 11 in a parallel posture and straddling it, insert the pipe ends of the first or preceding steel pipe columns 1 and 2 into the fitting gap of the joint joint plate 9, and connect the joint through holes 6 and bolt through holes 13. Align the centers and use blind bolts to attach the leading or trailing steel pipe column 1.
2 and the joint joint plate 9 are bolted to the inner plate 10. As long as it has the strength to connect the outer panel 11, it can be designed in any suitable form.

In addition, if the steel pipe to be connected to the joint column is a circular steel pipe or a deformed steel pipe, the joint plate 9 should have a curvature that matches the curvature of the pipe wall.
It shall have an outer plate, and shall be further provided with reinforcing ribs and connecting plates as necessary. In addition to the casting method, the joint plate 9 can be manufactured by an appropriate manufacturing method such as manufacturing a rolled plate welded structure, and in terms of quality, various alloy steels including low and medium carbon steel can be used. . However, if the rigidity is too high, the adhesion to the steel pipe column will be poor, and as a result, this will affect the shear resistance or friction coefficient when tightening the bolts, so these should be taken into consideration when designing.

〔Effect of the invention〕

According to the method of the present invention, when connecting a steel pipe column, there is no need for particularly highly accurate pipe end processing, and a highly reliable connection can be easily made without being influenced by the dimensions and form of the steel pipe column.

Furthermore, in addition to the great advantages of not requiring any auxiliary members for connection or the need for skilled workers, the mechanical strength of the connecting column is highly reliable, and it does not affect the working environment, especially in field work. Since it can be carried out without having to be carried out, it is extremely economical and has great practical effects.

[Brief explanation of drawings]

Fig. 1 is a schematic partial front view showing a situation in which leading and trailing steel pipe columns are connected using a joint joint plate as a pillar material of a building according to the present invention, and Figs. 2 and 3 are A-A in Fig. 1. A and BB cross-sectional views, Figure 4 is a schematic explanatory diagram showing the situation in which joint joint plates are screwed to the upper and lower pipe ends of the trailing steel pipe column, and Figures 5 (a) and (b).
), (C) to Figures 7 (a), (b), and (C) are front views, A-A vertical cross-sectional views, and plan views showing other examples of joint joint plates, and Figure 8 is a A schematic explanatory diagram showing the situation in which the pipe ends of the leading and trailing steel pipe columns are butted together to connect them. Figure 9 (a) shows the joint column reference lines set for the leading and trailing steel pipe columns, respectively, and the penetration for joining. An explanatory diagram showing the state in which the holes are drilled, FIG. 9(b) is a schematic front view of a joining joint plate with bolt through holes that match the joining through holes, FIGS. 10(a) and (b), (C) is a front view, AA longitudinal cross-sectional view, and plan view of the joint joint plate; Figure 11 is a schematic perspective view of the joint joint plate; Figure 12 is the joint joint plate at the end of the preceding steel pipe column made of square steel pipes. FIG. 13 is a schematic perspective view showing a situation in which the blind bolt is screwed onto the blind bolt. l... Leading steel pipe column, 1a... Pipe end, 2... Trailing steel pipe column, 2a... Pipe end, 3a, 3b... Long axis, 4...
・Plumb line, 5... Gap, 6a, 6b... Through hole for joining, 7... Bolt through hole, 8... Joining joint plate, 9,
9a to 9k...joint joint plate, IO...inner plate, 10a
, 1], a...upper part, 11... outer plate, 10b,
llb...lower, 12.12a-12d, 12i. 12J+, 12Jz, 12+, 12L-bridge, 13.13a, 13b, 13c, 13d-bolt through hole, 14.14a, ], 4b...blind bolt, 15...pin, 16...・Press sleeve, 17
...Pinch wheel, 18...Head, 19...Bottom, 20...Hex bolt. Agent Patent attorney Masamitsu Aki Sawa and 1 other person O'1 Fig. O'3 [k C Yoshitsuzu LA Kishi 10 Fig. (a) (C) Sai 11 Fig. 712 Fig.

Claims (1)

[Claims] (1) Set a joint column reference line in advance at the pipe end, and butt the pipe ends of the leading and trailing steel pipe columns that have a predetermined number of connecting through holes drilled at set intervals based on the joint column reference line. Also, a method for joining a steel pipe column in which a plurality of joint joint plates each having a bolt through-hole that matches the joint through-hole of the pipe end are brought into close contact with the pipe end and bolted together, the joint joint plates being , using a joint joint plate in which rectangular joint plates of the same shape having a predetermined number of bolt through holes drilled at matching intervals are connected in parallel to each other via a bridge section in the center of the facing part, and the joint joint plates are connected in advance. Straddle the pipe ends of the steel pipe column or trailing steel pipe column or leading and trailing steel pipe pillars, then bolt the connecting joint plate to the leading steel pipe pillar or trailing steel pipe pillar or the leading and trailing steel pipe pillars, and then After inserting the pipe end of the trailing steel pipe column into the fitting gap of the joint joint plate and aligning the joint through-hole with the bolt through-hole, use a blind bolt to connect the leading or trailing steel pipe column to the joint joint plate. A method of connecting steel pipe columns with bolts.