JPH08311991A - Connection method of steel pipe column - Google Patents

Abstract

PURPOSE: To greatly save labors in construction without welding works at the construction site and reduce the construction cost CONSTITUTION: An upper steel pipe column 11 and a connecting column 15 having different external dimensions are erected at the upper end of a lower column 10 through a horizontal plate 14. Either of the connecting column 15 and the upper steel pipe column 11 is inserted in the other column and the lower end of the upper steel pipe column 11 is placed on the horizontal plate 14 and thereafter, a grouting material 19 is charged into the space between the connecting column 15 and the upper steel pipe column 11 and solidified to connect the lower column 10 and the upper steel pipe column 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for connecting an upper steel pipe column to a lower column in various steel frame structures,
The present invention relates to a joint method for steel pipe columns.

[0002]

2. Description of the Related Art Generally, as a method of joining steel pipe columns in a steel frame structure, a method of butt-welding the ends of the upper and lower steel pipe columns on site is generally used. FIG. 6 is for explaining this type of conventional construction method. In this joint method, a plurality of bolt holes are previously formed in the upper end portion of the lower steel pipe column 1 and the lower end portion of the upper steel pipe column 2 each having a rectangular tubular shape. The provisional welding temporary plates 3 and 4 are attached at least one set on each surface at positions facing the respective steel pipe columns 1 and 2, and the upper steel pipe column 2 is placed on the lower steel pipe column 1. Later, these temporary plates 3 and 4 are replaced by the erection plate 5
The upper and lower steel pipe columns 1 and 2 are integrally joined by connecting with the bolts 6 and nuts through, and then performing on-site welding along the groove 7 formed between the mutually facing surfaces. After the on-site welding is completed, the bolt 6 is removed, the erection plate 5 is removed, and the temporary plates 3 and 4 are melted and removed, and then the melted portion is subjected to post-treatment such as smoothing with a grinder or the like. Are doing.

[0003]

In such a conventional steel pipe column joint method, the groove 7 of the upper and lower steel pipe columns 1 and 2 is machined, the temporary plates 3 and 4 are positioned, and There is a drawback that a great deal of time and labor is required for mounting work, further for fusing / removing work of the temporary plates 3 and 4 after welding, and for post-processing such as smoothing processing of the removed portion, and at the same time, for the welding portion in the field welding. There is a problem in that there are problems such as curing, management of the welding temperature or the welding rod, and a rise in construction cost as a whole. The present invention has been made to effectively solve the problems of the above-described conventional steel pipe column joint method, does not require on-site welding, and thus can significantly reduce the construction work and reduce the construction cost. It is an object of the present invention to provide a method for joining steel pipe columns that enables the conversion.

[0004]

In order to solve the above-mentioned problems, a method of joining steel pipe columns according to the present invention as set forth in claim 1 is directed to an upper steel pipe column and an outer pipe via a horizontal plate at the upper end of the lower column. After establishing a connecting column with a different method, insert one of the connecting column and the upper steel pipe column into the other and place the lower end of the upper steel pipe column on the horizontal plate, and then By filling grout between the upper steel pipe column and solidifying,
The lower column and the upper steel pipe column are joined together.

Here, the invention described in claim 2 is an embodiment in which the connecting column is inserted into the inside of the upper steel pipe column in the invention described in claim 1, wherein the horizontal column is
Externally smaller than the inner method of the upper steel pipe column is erected, and the outer peripheral portion of the connection column, by fixing the guide plate protruding outward from this, the upper steel pipe column It is characterized in that the upper steel pipe column is positioned by the guide plate when it is installed around the connecting column.

At this time, the invention according to claim 3 is to fill the grout from the grout injection hole formed in the lower end portion of the upper steel pipe column and to connect the grout above the grout injection hole. The discharge of grout from the grout discharge hole formed at a position lower than the upper end of the column, characterized in that the filling of the crout between the connection column and the upper steel pipe column is confirmed, Further, the invention according to claim 4 is characterized in that the lower column and the upper steel pipe column are steel pipe columns of the same shape.

Next, the invention described in claim 5 is an embodiment in the case where the upper steel pipe column is inserted into the inside of the connecting column in the invention described in claim 1 above, and on the horizontal plate, By vertically arranging a tubular connecting column having an inner method larger than the outer method of the upper steel pipe column, and fixing a guide plate protruding outward from the outer periphery of the lower end portion of the upper steel pipe column, the upper steel pipe When the pillar is inserted into the connecting pillar, the guide plate positions the upper steel pipe pillar.

The invention according to claim 6 is characterized in that, in the invention according to any one of claims 1 to 5, the lower column and the upper steel pipe column are connected at an intermediate portion of a floor. To do.

[0009]

In the invention according to any one of claims 1 to 6, the upper steel pipe column is arranged on the outer circumference or inside of the connecting column which is erected on the horizontal plate at the upper end of the lower column, and is connected. Since the lower column and the upper steel pipe column are joined by filling and solidifying grout between the column and the upper steel pipe column, the above-mentioned grout and connection can be performed without requiring any welding work as in the past. It is possible to integrally join the lower pillar and the upper steel pipe pillar via the working pillar. Therefore, not only the welding work between the upper and lower pillars and their management, but also the positioning and welding work of the temporary plate for the welding, and further the removal and post-treatment process after welding are unnecessary, and thus the upper and lower pillars The labor required for connection work can be significantly reduced.

Particularly, when the connecting column is inserted inside the upper steel pipe column, the invention described in claim 2 is fixed to the outer peripheral portion of the connecting column having a smaller outer method than the inner method of the upper steel pipe column. With the guide plate, the upper steel pipe columns are positioned in parallel with the exterior of the upper steel pipe columns around the connecting columns, so that it is easy to secure the erection accuracy of the upper steel pipe columns. Therefore, in such a joint, the upper and lower pillars have the same shape (same size) as in the invention according to claim 4.
It is suitable when applied to the joint of the steel pipe column in the frame.

By the way, when the above-mentioned connecting column is inserted inside the upper steel pipe column, after the upper steel pipe column is sheathed around the connecting column, the upper end portion of the internal connecting column is visually observed. It will be difficult. Therefore, it is difficult to confirm that the grout is filled when the grout is injected between the connecting column and the upper steel pipe column. In this respect, according to the invention as set forth in claim 3, the grout is filled from the grout injection hole formed in the lower end portion of the upper steel pipe column in advance, and the grout is filled above the grout injection hole and above the upper end of the connecting column. By visually observing that the grout is discharged from the grout discharge hole that is pre-drilled in the lower position, it is possible to easily and reliably confirm that sufficient grout is filled between the connecting column and the upper steel pipe column. It becomes possible.

According to the invention of claim 5, when the sizes of the upper and lower columns are different, that is, the upper steel pipe column is smaller than the lower column, and therefore the upper steel pipe column is inserted inside the connecting column. It is applied in the case where the upper steel pipe column is positioned in parallel with the insertion of the upper steel pipe column into the tubular connecting column by the guide plate fixed to the outer periphery of the lower end portion of the upper steel pipe column. Therefore, it is easy to ensure the erection accuracy of the upper steel pipe column, as in the invention according to claim 2.

The stress acting on the joint is large,
Therefore, when the joint portion is unsuitable as an end portion of a column, that is, a joint on a beam, the joint method according to any one of claims 1 to 5 is used as in the invention according to claim 6. It is preferable to apply the case where the lower column and the upper steel pipe column are connected in the middle part of the floor.

[0014]

Embodiment 1 FIGS. 1 and 2 show a joint structure to which a first embodiment of a jointing method for steel pipe columns according to the present invention is applied. Box-shaped lower steel pipe columns 10 and upper steel pipes having the same size as each other. It is a joint structure that joins the pillar 11. The lower steel pipe column 10
A rectangular horizontal plate 14 that is flush with the upper flange 13 of the beam 12 and constitutes a stiffener is integrally joined and fixed to an upper end portion that is a joint portion with the beam 12. And, on the upper surface of this horizontal plate 14, having a predetermined length dimension,
In addition, the lower ends of the box-shaped connecting columns 15 that are smaller in size than the upper steel pipe columns 11 are joined and erected integrally. Semicircular plate-shaped guide plates 16 are provided at the upper and lower ends of the outer peripheral surfaces of the connecting columns 15, respectively.
The semi-circular arc is attached in the vertical direction. Here, in the guide plate 16, the length dimension between the tops of the arcs of the pair of guide plates 16 on the facing surface of the connecting column 15 in the shape of a rectangular tube is the length between the facing inner walls of the upper steel pipe column 11. The size is slightly smaller than the size, and thus the inner peripheral surface of the upper steel pipe column 11 is formed so as to be tightly housed between the guide plates 16 and 16.

On the horizontal plate 14 and around the connecting column 15, the upper steel pipe column 11 is placed.
At the lower end of the upper steel pipe column 11, a grout injection hole 17
On the other hand, a grout discharge hole 18 is formed at a position above the grout injection hole 17 and below the upper end 15a of the connecting column 15. The high-strength mortar (grout) 19 is filled between the connecting column 15 and the upper steel pipe column 11 and solidified, so that the lower part is passed through the high-strength mortar 19 and the connecting column 15. The steel pipe column 10 and the upper steel pipe column 11 are integrally joined.

Based on the joint structure having the above structure,
A first embodiment of the steel pipe column joint method according to the present invention will be described. First, in a factory, a horizontal plate 14 is attached to the upper end surface of the lower steel pipe column 10, and the guide plate 16 is provided on the outer periphery of the horizontal plate 14. The column 15 for connection, which is fixed to, is aligned with the lower steel pipe column 10 so that their axial centers coincide with each other, and integrally joined by welding. Next, after erection of the lower steel pipe pillar 10 at the site, the upper steel pipe pillar 11 is gradually installed around the connecting pillar 15 from above the connecting pillar 15. Then, the upper steel pipe column 1
1 is guided by the guide plate 16 on the outer periphery of the connecting column 15 as it descends along the connecting column 15, and is positioned so as to have the same axis as the lower steel pipe column 10 and the upper steel pipe column 11 erection accuracy is secured. And
Finally, the upper steel pipe column 11 is placed on the horizontal plate 14 in a metal touch state.

After the upper steel pipe pillar 11 is positioned and placed on the horizontal plate 14 in this manner, the upper steel pipe pillar 11 is connected to the connecting pillar 15 via the hose 17a from the grout injection hole 17 of the upper steel pipe pillar 11. In the meantime, the high-strength mortar mentioned above is injected. Next, it is confirmed that the mortar has been filled between the upper steel pipe column 11 and the coupling column 15 and has leaked from the mortar discharge hole 18, whereby the mortar injection work is completed. Then, the solidification of the high-strength mortar 19 completes the connection between the lower steel pipe column 10 and the upper steel pipe column 11. In addition, when the tensile force in the axial direction is large due to the shear stress or the bending stress acting on the upper steel pipe column 11 described above, and therefore the joining force of the high-strength mortar 19 alone is insufficient, FIG. As shown, before filling the mortar,
The upper steel pipe column 11 and the coupling column 15 are reinforced by inserting a predetermined number of long bolts 20.

[0018]

[Embodiment 2] Further, when the stress acting on the joint portion is large and therefore the joint on the beam 12 is inconvenient, as shown in FIG. 3, the central portion 11c of the upper steel pipe column 11 where the stress is small is shown. The above joint may be provided in. FIG. 4 shows a joint structure according to the second embodiment of the present invention in which the joint having the above-described structure is provided in the central portion 11c of the upper steel pipe column 11, and is the same as that shown in FIGS. 1 and 2. The same reference numerals are given to the components, and the description thereof will be omitted. In the joint structure of this example, the upper steel pipe column 11 in the first embodiment is cut at the central portion thereof, and the lower portion (lower column) 11a thereof is integrally joined to the upper end portion of the lower steel pipe column 10. .

In order to construct such a joint, the lower portion 11 is previously attached to the upper end portion of the lower steel pipe column 10 in a factory.
It is desirable that the horizontal plate 21 is joined to a and its upper end, and the connecting column 15 is integrally joined to the upper surface of the horizontal plate 21 after the lower steel pipe column 10 is erected. On the horizontal plate 14, the lower portion 11a,
The horizontal plate 21 and the connecting column 15 may be joined and integrated. Next, the upper part of the upper steel pipe column 11 (upper steel pipe column)
11b is gradually installed around the connecting column 15 from above the connecting column 15. At this time, the upper portion 11b of the upper steel pipe pillar 11 is guided by the guide plate 16 on the outer periphery of the connecting pillar 15 as it descends along the connecting pillar 15 as in the first embodiment. The horizontal plate 21 is finally positioned so as to have the same axis as the lower portion 11a.
It is placed on top with a metal touch.

Then, the upper portion 11 of the upper steel pipe column 11
The above-mentioned high-strength mortar is injected from the grout injection hole 17 formed at the lower end portion of b to the connection column 15 via the hose 17a, and this mortar forms the upper portion 11b and the connection column 15 with each other. The filling work of the mortar is completed by confirming that the mortar has been filled in the space and leaked from the mortar discharge hole 18. The solidification of the high-strength mortar 19 completes the connection between the lower portion 11a and the upper portion 11b of the upper steel pipe column 11.

[0021]

[Embodiment 3] Next, FIG. 5 shows a joint structure to which a third embodiment of the method for jointing steel pipe columns according to the present invention is applied. A box-shaped lower steel pipe column 10 and a box smaller in size than this are shown. It is a joint structure for joining the upper steel pipe column 11 of the shape.
Also in the description of the present embodiment, the same components as those shown in FIGS. 1 and 2 are designated by the same reference numerals to simplify the description. Referring to FIG. 5, in this joint structure, the lower steel pipe column 10 is previously provided on the upper surface of the horizontal plate 14.
A connecting column 22 made of a box-shaped steel pipe having the same size as that of is joined and erected integrally. An upper steel pipe column 23 having a size smaller than that of the lower steel pipe column 10 is placed in the connecting column 22. This upper steel pipe column 1
A guide plate 24, which projects outwardly from each surface, is fixed to the outer periphery of the lower end portion of 1, and a bottom plate 25 for preventing leakage of the high-strength mortar 19 is joined to the lower end thereof. There is.

Here, in the guide plate 24, the length dimension between the tops of the arcs of the pair of guide plates 24 on the facing surface of the upper steel pipe column 23 is the length dimension between the facing inner walls of the connecting column 22. Is slightly smaller than that, that is, between the guide plates 24, 24, the connecting column 22
Is formed so that the inner peripheral surface of the is closely packed. Then, the same high-strength mortar (grout) 19 is filled between the connection column 22 and the upper steel pipe column 23 and solidified, so that the high-strength mortar 19 and the connection column 22 are solidified.
The lower steel pipe column 10 and the upper steel pipe column 23 are integrally joined via the. Reference numeral 26 in the figure indicates a wedge for positioning the upper steel pipe column 23.

Next, the upper and lower steel pipes 10 and 23 as described above
A third embodiment of the joint method for steel pipe columns according to the present invention will be described based on joint structures having different sizes. First,
In the same way as in the first embodiment, the lower steel pipe column 10 is used in the factory.
The horizontal plate 14 is attached to the upper end surface of the above, and the connecting column 22 is integrally joined to the lower steel pipe column 10 by welding, with their axial centers aligned with each other. Next, after erection of the lower steel pipe column 10 at the site, the upper steel pipe column 23 is gradually inserted into the connecting column 22 from above the connecting column 22. Then, as the upper steel pipe column 23 descends along the connecting column 22, it is guided by the guide plate 24 on the outer periphery of the lower end portion thereof and positioned so as to have the same axis as the lower steel pipe column 10. The erection precision is ensured, and the bottom plate 25 is finally placed on the horizontal plate 14 in a metal touch state.

Then, a wedge 26 is driven between the upper end portion 22a of the connecting column 22 and the upper steel pipe column 23 to adjust the erection of the upper steel pipe column 23, and then the upper steel pipe column 23 and the connecting pipe 23 are connected. The high-strength mortar 19 is poured into the inside through the upper opening between the pillar 22 and the pillar 22. And this high strength mortar 1
By observing from the upper opening that 9 has been filled between the connecting column 22 and the upper steel pipe column 23, the mortar injection work is completed, and the high-strength mortar 1
The solidification of 9 terminates the connection between the lower steel pipe column 10 and the upper steel pipe column 23. As in the case of the first embodiment, the tensile force in the axial direction is large due to the shear stress or bending stress acting on the upper steel pipe column 11 described above,
Therefore, if the joining strength of the high-strength mortar 19 is not sufficient, it is reinforced by inserting a predetermined number of long bolts as shown in FIG.

As described above, according to the joining method of the steel pipe columns shown in the first to third embodiments, the lower steel pipe columns 10 and 11b.
Connecting columns 15, which are erected on the horizontal plates 14 and 21 at the upper end of the
On the outer circumference of 22 or inside thereof, the upper steel pipe columns 11, 11a,
23 are arranged, the connecting columns 15 and 22 and the upper steel pipe column 11,
Since the lower steel pipe columns 10, 11b and the upper steel pipe columns 11, 11a, 23 are joined by filling the grout 19 between the lower steel pipe columns 11a, 23 and solidifying the grout 19, the welding work as in the prior art is completely eliminated. The lower steel pipe column 1 via the grout 19 and the connecting columns 15 and 22 without need
0 and the like and the upper steel pipe column 11 and the like can be integrally joined. For this reason, not only the welding work between the upper and lower columns and the management thereof in the conventional steel pipe column joint method, but also the positioning and welding work of the temporary plate for the welding, and the removal and post-treatment steps after welding are unnecessary. As a result, the labor required for connecting the upper and lower pillars can be significantly reduced. Further, particularly when erection of the upper steel pipe column 11 or the like, the erection accuracy can be easily and reliably ensured by the guide plates 16 and 24.

In the description of the first to third embodiments, only the case where the box-shaped upper and lower steel pipe columns 10 and 11 having the same size or different sizes are connected has been described, but the present invention is not limited to this. However, the present invention can be similarly applied to the case where the upper and lower steel pipe columns are cylindrical steel pipes. Further, particularly, the lower column is not limited to the case of being a steel pipe column, and the coupling column 15 in the case where the upper steel pipe columns 11 and 11a are further sheathed around is not limited to a tubular type. When no strength problem occurs, for example, H-section steel or the like can be used.

[0027]

As described above, according to the present invention as set forth in any one of claims 1 to 6, the conventional welding work is not required at all, and the grout and the connecting column are used. Since it is possible to integrally join the lower column and the upper steel pipe column, not only the welding work between the upper and lower columns and their management, but also positioning of the temporary plate for welding and welding work, and further after welding No removal or post-treatment process is required, and thus the labor required for connecting the upper and lower pillars can be greatly reduced.

In this case, according to the invention as set forth in claim 2 or 6, positioning is performed in parallel with the erection of the upper steel pipe column by the guide plate fixed to the outer periphery of the connecting column or the upper steel pipe column. Therefore, it is possible to easily secure the erection accuracy of the upper steel pipe column, and according to the invention of claim 3, it is easy to visually confirm that the grout is discharged from the grout discharge hole. Further, there is an effect that it is possible to surely confirm that the sufficient crout is filled between the connecting column and the upper steel pipe column. Further, in particular, according to the invention described in claim 6, even when the stress acting on the joint portion is large and therefore unsuitable as the joint on the beam, the same joint method can be applied by applying the joint method in the middle portion of the floor. It is preferable because the action and effect can be obtained.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a joint structure using a first embodiment of a steel tube column joint method according to the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

3 is a diagram showing a stress distribution in the column of FIG. 1. FIG.

FIG. 4 is a vertical sectional view showing a joint structure using a second embodiment of the present invention.

FIG. 5 is a vertical sectional view showing a joint structure using a third embodiment of the present invention.

FIG. 6 is a front view showing a joint structure using a conventional joint method.

[Explanation of symbols]

 10 Lower Steel Pipe Column (Lower Column) 11, 23 Upper Steel Pipe Column 11a Upper Part of Upper Steel Pipe Column (Upper Steel Pipe Column) 11b Lower Part of Upper Steel Pipe Column (Lower Column) 11c Central Part of Upper Steel Pipe Column 14, 21 Horizontal Plate 15 , 22 Connection columns 16, 24 Guide plate 17 Grout injection hole 18 Grout discharge hole 19 High strength mortar (grout)

Claims (6)

[Claims] 1. An upper steel pipe column and a connecting column having a different external method are erected on the upper end of the lower column via a horizontal plate, and one of the connecting column and the upper steel pipe column is inserted into the other. After placing the lower end of the upper steel pipe column on the horizontal plate,
A joint method for a steel pipe column, comprising joining the lower column and the upper steel pipe column by filling a grout between the connecting column and the upper steel pipe column and solidifying the grout. 2. A guide for arranging the connecting column having an outer method smaller than the inner method of the upper steel pipe column on the horizontal plate, and projecting outward from the outer peripheral portion of the connecting column. The steel pipe column according to claim 1, wherein the upper steel pipe column is positioned by the guide plate when the upper steel pipe column is sheathed around the connection column by fixing the plate. Joint method. 3. The grout injection hole formed in the lower end portion of the upper steel pipe column is filled with grout, and the grout injection hole is formed at a position above the grout injection hole and below the upper end of the connecting column. The filling of the crout between the connecting column and the upper steel pipe column is confirmed by discharging the grout from the grout discharge hole.
The method for jointing steel pipe columns according to. 4. The steel pipe column joint method according to claim 1, wherein the lower column and the upper steel pipe column are steel pipe columns having the same shape. 5. The tubular connecting column having an inner method larger than the outer method of the upper steel pipe column is erected on the horizontal plate, and on the other hand, on the outer periphery of the lower end portion of the upper steel pipe column, outwardly. The guide plate projecting in the direction is fixed so that the upper steel pipe column is positioned by the guide plate when the upper steel pipe column is inserted into the connecting column. Steel tube column joint method. 6. The joint method for a steel pipe column according to claim 1, wherein the lower column and the upper steel pipe column are connected at an intermediate portion of a floor.