JPH0551965A - Method of prefabricating construction of steel-pipe concrete pole - Google Patents

Abstract

PURPOSE:To form structure, in which upper and lower poles can be connected simply with high strength and there is no projection on an outer circumference in a connecting section, when a steel-pipe concrete pole previously filled with concrete is assembled at a construction site. CONSTITUTION:Filled type steel-pipe concrete poles 1 are manufactured previously under the state in which at least one end sections of steel pipes 1a are projected from the end faces of filled concrete 1b. When the upper and lower poles 1 are connected at a construction site, the steel pipes 1a are abutted mutually. The sections are bonded through welding. Mortar 7 is injected into a clearance 5 generated inside a welding section from a filler hole 3 and the clearance 5 is filled with mortar.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a prefabricated construction method for a steel pipe concrete column in which a steel pipe concrete column filled with concrete in a steel pipe is built on site by a prefabricated method. Regarding improvement of technology.

[0002]

2. Description of the Related Art When building a building with a steel tube concrete column structure, it is common to build a steel tube column on site and then fill the inside with concrete. In order to reduce equipment and labor, a prefabricated method in which concrete-filled steel tube concrete columns are produced at a factory and built on site is also adopted.

In the former method of filling concrete into steel pipe columns at a construction site, since the upper and lower steel pipe columns are integrated by the concrete to be filled, the connection strength between columns is relatively easy to obtain. In the prefabricated construction method in which the steel pipe is pre-filled with concrete, the filling concrete of the upper and lower columns is not an integrated product, so some special work is required to connect the columns.

Therefore, in the prefabricated construction method for steel pipe concrete columns, another tubular member is interposed between the joint portions of the upper and lower columns as is conventionally seen in JP-A-2-236332 (E04B 1/58). Joining by welding, or JP-A-2-115432 (E04B 1/3).
0) The upper and lower columns are connected by a flange joint structure.

[0005]

The method of welding and joining steel pipe concrete columns to each other through another tubular member has a problem that the joining work is very troublesome and time-consuming, and the advantages of the prefabricated construction method are sufficient. I couldn't make use of it. Also, it is relatively easy to connect steel pipe concrete columns to each other with a flange joint structure, but since the flange joint part projects significantly outside the column, the joint part overhangs in the interior space of the building, There was a problem of poor fit.

The present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to perform a connecting work between upper and lower pillars in a prefabricating method for assembling a steel pipe concrete pillar in which concrete is filled in advance at a construction site. It is easy and has a high connection strength, and the connection part does not project to the outer periphery.

[0007]

Therefore, in the present invention, a filled-type steel pipe concrete column is manufactured in advance with at least one end of the steel pipe protruding from the end face of the filled concrete, and the above and below said columns are constructed at a construction site. When connecting by abutting, first the end faces of the steel pipes of the upper and lower columns are butted and welded to each other, and in the gap between the end faces of the filled concrete of the upper and lower columns generated inside the welded part, the welded part is formed. The mortar was filled from the injection port formed in the nearby steel pipe.

[0008]

Since at least one end of the steel pipe projects from the end face of the filled concrete, the end faces of the steel pipe are surely butted to each other without being obstructed by the end faces of the filled concrete when the upper and lower columns are butted. Therefore, by welding the steel pipes together, they can be connected with high strength. Further, inside the welded portion, there is a gap between the cross sections of the filled concrete of the upper and lower columns, but by filling mortar here, the concrete inside can be integrated with each other.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1, FIG. 2 and FIG. 3 show, in order, a prefabricated construction method for steel pipe concrete columns according to an embodiment of the present invention. In each figure, a portion where two upper and lower steel pipe concrete columns 1 are butted and connected to each other is extracted and shown. The steel pipe concrete pillar 1 is made by filling the steel pipe 1a with concrete 1b in advance. Further, the steel pipe 1a has a length corresponding to the height of a plurality of stories, and a steel frame beam 2 made of H-shaped steel is fixed to a predetermined position by welding or the like. This pillar 1 is transported to the site and set up vertically.

When manufacturing the steel pipe concrete pillar 1, the upper end of the pillar 1 is set so that the upper end of the steel pipe 1a projects from the upper end surface of the filled concrete 1b by a dimension e.
At the lower end, the lower end of the steel pipe 1a is projected from the lower end surface of the filled concrete 1b by a dimension f. Steel pipe 1
The upper and lower end faces of a are each cut to be tapered. Further, an injection port 3 for injecting mortar is opened at a predetermined position of the lower end protruding portion of the steel pipe 1a as described later.

The backing ring 4 is fitted on the inner circumference of the steel pipe 1a at the upper end of the lower pillar 1 which has been built in first, and the lower end of another pillar 1 to be added is abutted thereon. Then, as shown in the figure, the end faces of the steel pipes 1a of the upper and lower columns 1 abut each other, and the backing ring 4
It will be in a state where it is fitted. At this time, a gap 5 corresponding to the sum of the dimension e and the dimension f is formed between the upper surface of the filled concrete 1b of the lower pillar and the lower surface of the filled concrete 1b of the upper pillar. In this state, the steel pipes 1a butted together are welded to each other. 6 shows welded meat.

Next, as shown in FIG. 3, a gap 5 formed inside the welded portion of the two butt-welded steel pipes 1a.
Then, the mortar 7 is injected from the injection port 3 and filled. With this, the steel pipes 1a are firmly connected to each other, and the concrete 1b inside is also integrated.

[0013]

As described in detail above, in the prefabricated construction method for a steel pipe concrete column according to the present invention, when the end portions of the steel pipe are appropriately projected from the end face of the filled concrete, the upper and lower columns are abutted. In addition, the steel pipes are reliably joined together without the filling concrete of the upper and lower columns becoming an obstacle at all. By welding this, a considerably high joint strength can be obtained. Furthermore, because mortar is injected and filled in the gap between the filled concrete generated inside the butt section,
It also provides the integrity of the concrete inside. In this way, steel pipe concrete columns can be assembled in a prefabricated manner by a simple connecting work. Also, there are no large protrusions like flange joints at the connecting part, which does not hinder the internal space of the building.

[Brief description of drawings]

FIG. 1 is a process diagram 1 of a prefabricated construction method for a steel pipe concrete column according to an embodiment of the present invention.

FIG. 2 is a second process chart of the same as above.

FIG. 3 is a process chart No. 3 of the same as above.

[Explanation of symbols]

 1 Steel tube concrete column 1a Steel tube 1b Filled concrete 2 Steel beam 3 Injection port 4 Backing ring 5 Gap 6 Weld meat 7 Mortar

Claims (1)

[Claims] 1. A filled-type steel pipe concrete column is manufactured in advance with at least one end of the steel pipe protruding from the end face of the filled concrete, and when connecting the upper and lower columns to each other at a construction site, first of all, The end faces of the steel pipes of the columns are butted against each other and welded, and in the gap between the end faces of the filled concrete of the upper and lower columns generated inside the welded part, the steel pipes near the welded parts are formed. Prefabricated construction method for steel tube concrete columns, which is characterized by filling mortar from the inlet.