JPH085054B2 - Steel tube concrete column manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a). INDUSTRIAL APPLICABILITY The present invention relates to concrete mortar (in the present specification, in a solid state) even if ribs are provided inside.
"Concrete mortar" relates to a method for manufacturing a steel pipe concrete column in which "concrete" or "mortar" can be placed.

(B). 2. Description of the Related Art Conventionally, no ribs or other obstacles for densely placing concrete or mortar have been provided inside the steel pipe of the steel pipe concrete column.

(C). Problems to be Solved by the Invention However, providing such ribs in the steel pipe has a great effect in smoothly transmitting stress between the beams.
Therefore, even if such ribs are provided, the development of a method for manufacturing a steel pipe concrete column that allows solid placement of concrete mortar inside the steel pipe has been awaited.

As a method of constructing a pillar of a structure, a method of constructing by connecting a plurality of steel pipe pillars manufactured in a predetermined length in series by welding is known. But,
When such a construction method is used, concrete
When using steel pipe concrete columns with mortar, there is a risk that the heat generated by welding will deteriorate the concrete and mortar bodies placed inside the steel pipe concrete columns, making it impossible to achieve the specified design strength. Even if concrete mortar is cast in the provided steel pipe, its effect is halved.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method for manufacturing a steel pipe concrete column, which is capable of densely placing concrete mortar inside the steel pipe even if ribs are provided inside the steel pipe in order to solve the above-mentioned drawbacks. It is a thing.

Further, the present invention, even in the case of constructing a column by connecting a plurality of steel pipe concrete columns in a state of being manufactured to a predetermined length in series by welding, the internal concrete mortar body is affected by the heat of welding. Another object of the present invention is to provide a method for manufacturing a steel pipe concrete column that does not receive the damage.

(D). Means for Solving the Problems That is, the present invention is formed in a predetermined length, which is used when constructing the pillar by connecting in series by welding at the construction site of the pillar of the structure. In a steel pipe concrete column (1), when manufacturing the steel pipe concrete column, a cylindrical column body (1a) formed to have the predetermined length.
A rib (1d) is provided at least on the inside of the beam connection part of the column, and in the state where the rib is provided, concrete mortar is placed in the column body while vibrating the column body, and a predetermined distance (L1 ) A concrete mortar body (3) is formed by pouring from a position above to a position a predetermined distance (L1) below the upper end of the pillar main body, and at the same time, the concrete It is configured to form a non-filled portion of mortar that is not filled.

It should be noted that the numbers in parentheses indicate the corresponding elements in the drawings for the sake of convenience, and thus the present description is not limited to the description in the drawings. The same applies to the section "(e). Action" below.

(E). Action With the above-described structure, according to the present invention, by placing concrete mortar in a state where the column body (1a) is vibrated, the concrete mortar is placed in the column body (1a) without generating voids. Acts like.

Further, in the present invention, the non-filled portions (1 g) of concrete and mortar, which are formed above and below the concrete and mortar body (3) and are not filled, adversely affect the heat of welding on the concrete and mortar body (3). Acts to prevent that.

(F). Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a cross-sectional view of an embodiment of the method for producing a steel pipe concrete column according to the present invention during production of a steel pipe concrete column, and FIG. 2 is a sectional view showing an example of a steel pipe concrete column produced according to the present invention. FIG. 3 is a plan view of the steel pipe concrete column of FIG.

As shown in FIGS. 2 and 3, a steel pipe concrete pillar 1 is a pillar body formed of a steel pipe into a cylindrical shape having a predetermined length.
The column main body 1a is provided with two octagonal plate-shaped external ribs 1b on the outer peripheral portion of the column main body 1a in a shape corresponding to the position where the beam 2 is connected (beam connection site). It is provided so as to surround the circumference of. The outer rib 1b is provided with four beam connection portions 1c at a pitch of 90 °, and further inside the column main body 1a,
An annular internal rib 1d is fixed at a position facing the external rib 1b. A concrete flow hole 1e is formed through the center of the inner rib 1d, and a concrete mortar body 3 filled with concrete mortar is formed on the inner surface of the steel pipe concrete column 1.

In addition, as shown in FIG. 1, the table vibrator 7 used when manufacturing the steel pipe concrete pillar 1 is
It has a work mounting surface 7a on which the pillar main body 1a is mounted, and the work mounting surface 7a is provided with a cylindrical projection 7b having a height L1.

Since the steel pipe concrete pillar 1 has the above-mentioned structure, when manufacturing the steel pipe concrete pillar 1, the first
As shown in the figure, when the external ribs 1b and the internal ribs 1d are provided at the beam connection portions of the column body 1a made of steel pipe, the column body 1a
Is installed on the table vibrator 7 in such a manner that the lower end 1f of the column main body 1a is fitted into the protrusion 7b. Further, a plurality of vibrators 9 are installed between the outer ribs 1b, 1b of the pillar body 1a and in the central portion of the pillar body 1a, and concrete mortar is poured into the pillar body 1a in that state. Then, the poured concrete mortar fills the cylindrical space in the column main body 1a from the lower end of the column main body 1a upward by a distance L1 from the upper surface 7c of the projection 7b toward the upper side in the figure. It is placed in a shape. In addition, at this time, by driving the table vibrator 7 and the vibrator 9, vibration is applied to the column main body 1a, and the concrete mortar cast in the column main body 1a is totally moved including the vicinity of the internal rib 1d. Make sure that the casting is done without any gaps. Thus, while vibrating the pillar body 1a, when the concrete mortar was placed from the upper end 1f in FIG. 1 to the position of the distance L1, the pillar body 1a
Concrete / mortar in 1a is solidified to form a concrete / mortar body 3 to manufacture a steel pipe concrete column 1 as shown in FIG. Further, as shown in FIG. 2, the non-filled portions 1g and 1g where the concrete mortar is not filled in the upper end portion and the lower end portion of the column main body 1a by the concrete mortar cast on the projection 7b of the table vibrator 7. Is formed.

In this way, when the concrete / mortar body 3 is formed, the steel pipe concrete pillar 1 is transported to the pillar construction site and erected at a predetermined pillar construction position. As shown in, the steel pipe concrete column 1 to be newly constructed is connected in series to the tip of the steel pipe concrete column 1 that has already been constructed, and the ends 1f are welded to each other so that both columns 1 and 1 are integrated. Turn into. At this time, as shown in FIG. 2, the concrete-mortar body 3 has the non-filled portion 1g not filled with the concrete-mortar having the distance L1 formed at the upper and lower ends of the column main body. Since it is separated from the end 1f of the column main body 1a where welding is performed by a predetermined distance L1, it is not adversely affected by the heat of welding.

When the steel pipe concrete columns 1 and 1 are connected in series in the vertical direction in FIG. 2, the unfilled portions 1g and 1g of the steel pipe concrete columns 1 and 1 that are adjacent to each other inside the connected steel pipe concrete columns 1 and 1 Concrete mortar 6 is press-fitted into the space 5 portion formed by, and the portion is filled with the concrete mortar 6 to complete the construction work of the steel pipe concrete pillar 1 for one unit. In this way, the columns of the structure are constructed by successively connecting the steel pipe concrete columns 1 onto the existing steel pipe concrete columns 1. In addition, as shown in FIG. 3, the connection between the steel pipe concrete pillar 1 and the beam 2 is made by connecting the beam connecting portion 1c provided on the outer rib 1b.
Done through.

In the above-mentioned embodiment, the cross section of the pillar main body 1a is circular as shown in FIG. 3, but the present invention is not limited to this.
As long as the inner rib 1d is provided at least inside the pillar body 1a,
Of course, the column main body 1a may have any cross-sectional shape, for example, the cross-section may be quadrangular or polygonal.

(G). Effects of the Invention As described above, according to the present invention, at a construction site of a pillar of a structure, the pillar is formed to have a predetermined length which is used when the pillar is constructed by connecting in series by welding. In the steel pipe concrete pillar 1, the ribs such as the internal ribs 1d are provided at least inside the beam connecting portion of the cylindrical pillar body 1a formed in the predetermined length when the steel pipe concrete pillar is manufactured. With the rib provided, concrete mortar in the pillar body while vibrating the pillar body, from a position a predetermined distance L1 above the lower end of the pillar body,
A concrete mortar body 3 is formed by pouring into a position below a predetermined distance L1 from the upper end of the pillar main body,
Since the non-filled portion 1g, which is not filled with concrete mortar, is formed at the upper end and the lower end of the pillar main body, it is configured so that the concrete mortar is cast into the pillar main body 1a by the internal ribs. Despite its existence, it is possible to place it in a solid state.

Further, by forming the non-filled portion, when the steel pipe concrete columns are connected in series by welding, it is possible to prevent the occurrence of a situation where the strength of the concrete / mortar body is adversely affected by the heat of welding and its strength is reduced. In addition to the fact that concrete mortar can be densely placed in the ribbed steel pipe, it is possible to provide a highly reliable method of manufacturing a steel pipe concrete column.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an embodiment of the method for producing a steel pipe concrete column according to the present invention during production of a steel pipe concrete column, and FIG. 2 is a sectional view showing an example of a steel pipe concrete column produced according to the present invention. FIG. 3 is a plan view of the steel pipe concrete column of FIG. 1 …… Steel tube concrete column 1a …… Column body 1d …… Rib (internal rib) 1g …… Unfilled part 3 …… Concrete / mortar

 ─────────────────────────────────────────────────── --- Continuation of the front page (56) References JP-A-61-179948 (JP, A) JP-A-62-101734 (JP, A) JP-A-62-164927 (JP, A) JP-A-60- 73961 (JP, A) JP 59-39026 (JP, B2) JP 62-36107 (JP, B2)

Claims (1)

[Claims] 1. A steel pipe concrete column having a predetermined length, which is used when constructing a column by connecting in series by welding at a construction site of a structure column, said steel pipe concrete column. At the time of manufacturing, a rib is provided at least inside the beam connection portion of the cylindrical column body formed to have the predetermined length, and in the state where the rib is provided, the column body is vibrated while vibrating the column body. Concrete mortar is poured from a position above a predetermined distance from the lower end of the pillar body to a position below a predetermined distance from the upper end of the pillar body to form a concrete mortar body, and the upper end of the pillar body is also formed. A method for producing a steel pipe concrete column, wherein a non-filled portion where concrete and mortar are not filled is formed at the lower portion and the lower end portion.