JPH06146410A - Construction method of steel pipe concrete - Google Patents

Abstract

PURPOSE:To enhance strength and toughness by densely filling concrete inside a steel pipe. CONSTITUTION:Inner diaphragms 3 are fitted in the positions where a H-steel beam is fitted to the column of a vertical square steel pipe 1, and the diaphragm 3 is provided with through-holes through which concrete 7 is passed, and a concrete forcibly feeding pipe 4 which is arranged inside the steel pipe 1 so as to be extended downward and whose bottom is opened is penetrated through the diaphagms 3. The concrete forcibly feeding pipe is welded to the diaphragms 3 so as to be integrated with the steel pipe 1 and is arranged along the axis of the steel pipe. Concrete 7 is forcibly fed from the top of the feeding pipe 4, so that concrete is filled inside the steel pipe 1 from the lower part toward the top thereof, and a steel pipe concrete column is constructed without removing the forcibly feeding pipe 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a steel pipe concrete column by placing concrete in an upright steel pipe.

[0002]

2. Description of the Related Art Conventionally, two methods have been used for constructing a steel pipe concrete column by pouring and filling concrete into an upright steel pipe. That is, there was a method of pouring concrete from the upper end of the steel pipe using a bucket or the like, and a method of press-fitting concrete from the lower end of the steel pipe.

This conventional method has a problem in the filling property of concrete, and in the method of (1), it is necessary to make a hole for press-fitting concrete in the lower end portion of the steel pipe, and it is necessary to repair it after pouring. In addition, since the beam joints of steel pipes having continuous heights of a plurality of floors in the vertical direction are provided with some reinforcement such as an inner diaphragm, it is difficult to densely fill the concrete.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems. Its purpose is to propose a method for constructing a steel pipe concrete column that is capable of densely filling concrete even if the steel pipe is long or has been reinforced such as a diaphragm inside, and has no defects and excellent strength. .

[0005]

According to a first aspect of the present invention, there is provided a method for constructing a steel pipe concrete column, wherein the concrete is cast in an upright steel pipe to construct a steel pipe concrete column. A concrete press-fitting pipe with an extended tip is opened, and concrete is press-fitted from the top end of the press-fitting pipe and discharged from the tip to the inside and bottom of the steel pipe,
It is characterized in that concrete is filled from the lower part to the upper part of the steel pipe to construct columns without pulling out the press-fitting pipe.

According to a second aspect of the present invention, in the method for constructing a steel pipe concrete column according to the first aspect, a diaphragm is attached in the steel pipe.
It is characterized in that the diaphragm is provided with a through hole for allowing concrete to pass through, a concrete press-fitting pipe penetrates the diaphragm, and is fixed to the diaphragm to be integrated with the steel pipe, and is arranged along the shaft core.

According to a third aspect of the present invention, in a method for constructing a steel pipe concrete column by placing concrete in an upright steel pipe, a concrete press-fitting pipe having a tip extending downward from an upper end of the steel pipe is inserted into the steel pipe, and the press-fitting pipe is inserted. It is characterized in that concrete is press-fitted from the upper end, discharged from the tip into the lower part of the steel pipe, and filled with concrete from the lower part of the steel pipe to the upper part, and the press-fitted pipe is constructed as a pull-out column by following the rise of the filling height. .

[0008]

In the construction method of the above construction, the concrete is discharged from the tip of the press-fitting pipe into the lower part of the column of the upright steel pipe, and the concrete is filled while allowing air to escape upward from the bottom to the top. Even if there are some protrusions, it can be packed densely.

According to the methods of claims 1 and 2, since the press-fitting pipe arranged in the steel pipe is not pulled out, the pouring pipe is integrated with the steel pipe and concrete to form a pillar, which serves as a shaft core and contributes to the improvement of strength. According to the method of claim 2, a diaphragm is attached,
The joint between the steel pipe column and the H-shaped steel beam is reinforced, and at the same time, the press-fitting pipe is fixed to the diaphragm, and it is arranged integrally with the steel pipe and along the shaft core, so that the press-fitting pipe for the steel pipe, diaphragm, concrete and shaft core Together, the strength and toughness can be further improved. The diaphragm has a through hole through which concrete can pass, and does not hinder the dense packing of concrete.

According to the method of claim 3, in addition to exhibiting the above-mentioned action, the press-fitting pipe can be drawn out and used repeatedly, so that the cost can be reduced.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1, 2, 3 and 4 show embodiments of claims 1 and 2. FIG. 1 is an example of construction in which concrete is placed inside a square steel pipe 1 having an upright square section with a height of two floors to construct a steel pipe concrete column. Beams of H-shaped steel 2 are attached to the first and second floors at high positions, and two inner diaphragms 3 are welded and arranged inside each to reinforce them.

A concrete press-fitting pipe 4 extending downward from the upper end is inserted into the square steel pipe 1 along the axis, and the tip of the concrete press-fitting pipe 4 is disposed at the bottom of the square steel pipe 1.

As shown in FIG. 2, the inner diaphragm 3 is provided with four fan-shaped through holes 5 at the four corners through which concrete can pass and rise, and the press-fitting pipe 4 made of a round steel pipe is the diaphragm. 3 is pierced through the central part, and the periphery of the penetrating position is welded 6 and fixed to the diaphragm 3.
Is integrated with the square steel pipe 1.

Concrete is poured into the square steel pipe 1,
In order to construct a steel pipe concrete column, concrete 7 is press-fitted from the upper end of the press-fitting pipe 4, discharged from the tip to the bottom of the square steel pipe 1, and the concrete 7 is filled from below the square steel pipe 1 to above. The concrete 7 passes through the through holes 5 of the diaphragm 3, rises while allowing air to escape upward, and is densely filled. As shown in FIG. 3, the concrete 7 is a square steel pipe 1.
Confirm that the upper end of the
Construct steel pipe concrete columns without pulling out.

In FIG. 4, a reinforcing steel pipe 8 is reinforced on the outer periphery of the press-fitting pipe 4 at the column-beam joint to further strengthen the column-beam joint, and the column is constructed without pulling out the press-fitting pipe. It is a thing.

5 and 6 show an embodiment of claim 3. FIG. 5 is an example of construction in which concrete is cast inside the upright square steel pipe 1 having a second floor height to construct a steel pipe concrete column, as in the above-described embodiment. A beam of H-shaped steel 2 is attached to each of the first and second floor high positions, and two diaphragms 3 and 3 are attached to the inside thereof. As shown in FIG. 5 (b), the diaphragm 3 has four through holes 5 at the corners and an insertion hole 9 for a concrete press-fitting pipe at the center.

A concrete press-fitting pipe 4 extending downward from the upper end is inserted into the square steel pipe 1 through an insertion hole 9, concrete 7 is press-fitted from the upper end thereof, and the concrete 7 is discharged from the tip to the bottom of the square steel pipe 1 and the concrete 7 is pushed downward from above. To fill. In this process, following the rise of the height of the top surface of the concrete 7, while gradually pulling out the press-fitting pipe 4 upward, the concrete 7 is placed, and the concrete is filled up to the upper end as shown in FIG. Remove 4 and build a pillar.

FIG. 5C shows the inner diaphragm 3 of the square steel pipe 1.
Instead of this, an outer diaphragm 3'is attached to the outer periphery for reinforcement, and the press-fitting pipe 4 is inserted inside.

FIG. 7 shows an example of the mode of connection between the reinforcing means of the steel pipe column and the concrete press-fitting pipe. (a) is an example in which the air vent holes 10 are provided at the four corners of the diaphragm 3 mounted inside the square steel pipe 1, and (b) is a square press-fitting pipe 4'through the diaphragm 3 (C) is a rectangular steel pipe 1 with two long tightening bolts 11 arranged in parallel between the two facing surfaces arranged in a pair of girders for reinforcement, and the central portion of the bolts is inserted to form a square shape. This is an example in which the press-fitting pipe 4 ′ is arranged. In the cases (a), (b), and (c), the press-fitting pipe can be fixed to the diaphragm or the long tightening bolt, or the column can be constructed without fixing.

FIG. 8 shows an example of a steel pipe concrete column using a round steel pipe 1 ', in which a diaphragm 3 is provided with a through hole 5, and (a) is a round press-fitting pipe 4 extending through the central portion thereof. Yes,
(b) is an example in which a rectangular press-fitting pipe 4'is provided.

[0021]

EFFECTS OF THE INVENTION It is possible to construct a column without defects by densely filling concrete inside a steel pipe.

According to the method of claims 1 and 2, the concrete press-fitting pipe is integrated with a steel pipe concrete or a reinforcing material such as a diaphragm to form a shaft to form a column, and the strength,
Contributes to the improvement of toughness.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a method for constructing a steel pipe concrete column according to an embodiment of claims 1 and 2.

2 (a) and 2 (b) are enlarged views of the AA cross section and the vertical cross section of FIG.

FIG. 3 is a vertical cross-sectional view of a state where the poured concrete reaches the upper end of the steel pipe.

4 (a) and (b) are a horizontal cross-sectional view and a vertical cross-sectional view of a steel pipe concrete column in which a press-fit pipe is covered with a reinforcing steel pipe for reinforcement.

5A is a sectional view showing a method of constructing a steel pipe concrete column according to an embodiment of the claims, FIG. 5B is a sectional view taken along line AA, and FIG. 5C is a plan view with an outer diaphragm attached. .

FIG. 6 is a vertical cross-sectional view of a state in which the poured concrete reaches the upper end of the steel pipe.

FIG. 7 (a) is a diaphragm having air vent holes at four corners, (b) is a diaphragm through which a rectangular press-fitting pipe passes, and (c).
[Fig. 4] is a plan view of a double-column-shaped long tightening bolt reinforcing portion.

8A is a plan view of a round press-fitting pipe, and FIG. 8B is a plan view of a diaphragm mounted in a round steel pipe through which a square press-fitting pipe penetrates.

[Explanation of symbols]

1 ... Square steel pipe, 1 '... Round steel pipe, 2 ... H-shaped steel beam, 3 ... Diaphragm, 4 ... Concrete press-fitting pipe, 5 ... Through hole, 6 ... Welding,
7 ... Concrete, 8 ... Reinforcing steel pipe, 9 ... Insertion hole of press-fitting pipe, 10 ... Air venting through hole, 11 ... Long tightening bolt.

Claims (3)

[Claims] 1. A method for constructing a steel pipe concrete column by placing concrete in an upright steel pipe, wherein a concrete press-fitting pipe having a downwardly extending tip extending from the upper end of the steel pipe is provided in the steel pipe, and the press-fitting pipe upper end. A method for constructing a concrete column for a steel pipe, characterized in that concrete is press-fitted from above, discharged from the tip into the lower part of the steel pipe, filled with concrete from the lower part inside the steel pipe to the upper part, and the column is constructed without pulling out the press-fitted pipe. 2. The method for constructing a concrete column for a steel pipe according to claim 1, wherein a diaphragm is attached in the steel pipe, a through hole for allowing concrete to pass through is provided in the diaphragm, and a concrete press-fitting pipe penetrates the diaphragm and is fixed to the diaphragm. A method for constructing a steel pipe concrete column, characterized by being integrated with a steel pipe and arranged along an axis. 3. A method for constructing a steel pipe concrete pillar by placing concrete in an upright steel pipe, wherein a concrete press-fitting pipe having a downwardly extending end extending from the upper end of the steel pipe is inserted into the steel pipe, Steel pipe concrete characterized by press-fitting concrete, discharging it from the tip to the lower part inside the steel pipe, filling the concrete from the lower part inside the steel pipe to the upper part, and following the rise of the filling height to pull out the press-fitting pipe to form a column. How to build a pillar.