JPH05311887A - Plumbing adjusting method for steel column - Google Patents

Abstract

PURPOSE:To enable plumbing adjustment for a steel column safely and with good efficiency and to enable final-fastening of a high strength bolt at the time of erecting a steel column. CONSTITUTION:Splice plates 3 are held to both surfaces in such a manner as to clamp flanges 1a, 2a of a connecting area between an upper knot steel column 1 and a lower knot steel column 2, and a high strength bolt 4 for final fastening is fitted thereto and tightened by hands. Subsequently, jack fitting jigs 5 are mounted on flange areas above and below the splice plate 3 by fixing bolts 8, and a jack 7 is set between upper and lower jack fitting jigs 5 through a pin 6. When the installation of the jack 7 is completed, the jack 7 is elongated and contracted while the perpendicularity of the upper knot steel column 1 is measured and the difference of elevation is measured by a spirit level, a level or the like to adjust the upper knot steel column 1 to a correct attitude and a correct height, and after plumbing becomes correct, the high strength bolt 4 of the splice plate 3 is finally fastened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for adjusting the installation of a steel column.

[0002]

2. Description of the Related Art As a conventional method of adjusting a building, as shown in FIG. 3, hooks are provided on the head and legs of a steel column at each node, and a hook is provided between the hooks at diagonal positions. The wire or chain was stretched, and the strain was corrected using a turnbuckle or a lever block.

Conventionally, as shown in FIG. 4, projecting frames are attached to both sides of a leg of a steel frame column, and a jack is set between these frames and the beam, and a reaction force is applied to the beam to construct the steel frame column. Was being rebuilt.

However, in the adjusting method using the wire or the like, since the horizontal force due to the tension of the wire or the like acts in the direction of contracting the span, it is impossible to widen the span, and the span tends to be shortened. However, since it is necessary to attach the upper beam in advance before performing the re-distortion work, there is a problem in that dangerous high-place work is involved.

Further, in the adjusting method using the overhanging frame, not only the frame is large and a heavy machine is required for its movement, but also the bending must be performed in consideration of the bending of the beam in order to take the reaction force of the jack. There were problems such as.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art. The object of the present invention is to enable the safe and efficient adjustment of the installation of steel columns. An object of the present invention is to provide a method for adjusting the installation of a steel-framed column, which enables the high-strength bolt to be fully tightened when the steel-framed column is built.

[0007]

[Means for Solving the Problems] A method for adjusting the installation of a steel frame column according to the present invention is to install an upper section steel column on a lower section steel column,
Attach the splice plate to the connection by hand tightening with high-strength bolts, attach the jack attachment jigs to the upper and lower steel frame pillars of the splice plate, and attach the jack between the jack attachment jigs to expand and contract the jack. While adjusting the position and the posture of the upper joint steel column, the high-strength bolt is fully tightened. It is also characterized in that the above-mentioned jacks are attached to two side surfaces of the steel frame column which are orthogonal to each other and adjustment is performed in two directions.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1 (A), reference numeral 1 denotes an upper joint steel column, which is appropriately suspended by a heavy machine (not shown) on the lower joint steel column 2 which is already built in a predetermined position.

Next, as shown in FIG. 1 (B), splice plates 3 are placed on both sides so as to sandwich the flanges 1a and 2a of the connecting portion between the upper and lower steel column 1 and 2. At the same time, a high-strength bolt (HTB) 4 for final tightening is attached and tightened by hand.

Subsequently, as shown in FIG. 1C, the jack mounting jig 5 is mounted on the upper and lower flange portions of the splice plate 3 by the mounting bolts 8, and
As shown in (D), the jack 7 is set between the upper and lower jack mounting jigs 5 through the pin 6. The mounting bolt 8 of the jack mounting jig 5 is fully tightened after the jack 7 is set. Further, it is important for the connection by the pin 6 so that the expansion and contraction of the jack 7 can be transmitted to the steel columns 1 and 2 without play.

After the jack 7 is installed, the verticality of the upper joint steel column 1 is measured using a plumb bob from the stigma or a vertical instrument, or the level difference is measured using a level or level. While measuring, the jack 7 is expanded / contracted to adjust the upper joint steel column 1 to a correct posture and height position, and when the building is properly installed, the high strength bolt 4 of the splice plate 3 is fully tightened. It should be noted that by combining a vertical device for laser measurement and a computer, it is possible to automatically control placement adjustment.

After the high-strength bolt 4 is completely tightened and the upper steel column 1 is joined to the lower steel column 2, the pin 6 is removed to remove the jack 7, and the jack mounting jig 5 is removed. , End construction adjustment work. In addition, steel column 1
If you use an automatic ridging machine for slinging, you can eliminate the work at height associated with erection work.

In the above embodiment, adjustment by one set of jacks has been described. Normally, the jacks are set on two side surfaces of a steel frame column which are orthogonal to each other, and the building is re-distorted in two directions, the X direction and the Y direction. . Further, although the cross-shaped steel column is described in the above-mentioned embodiment, the steel column of the present invention is not limited to this, and may be an H-type steel column, an I-type steel column, or a steel tube column.

[0014]

【The invention's effect】

1) Since the steel column can be built in the regular position with high accuracy, span adjustment can be performed accurately. 2) Since the reaction force of the jack is taken by the lower steel column, it is not necessary to consider the beam. 3) Since the high-strength bolts can be fully tightened when building the steel columns, the beams can be built after the steel columns are fully tightened, and there is no need to work in high places during temporary tightening, which is safe. . 4) Since the erection of steel columns and the final tightening are performed in parallel, the number of workers in each professional occupation can be averaged.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a work order of a placement adjustment of the present invention.

FIG. 2 is an enlarged explanatory view of a construction adjustment work using a jack.

FIG. 3 is an explanatory diagram of a conventional placement adjustment work.

FIG. 4 is an explanatory view of another conventional placement adjustment work.

[Explanation of symbols]

 1 Upper Section Steel Column 1a Flange 2 Lower Section Steel Column 2a Flange 3 Splice Plate 4 High Strength Bolt 5 Jack Mounting Character 6 Pin 7 Jack

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Osamu Yoda 1-16-14 Shibuya, Shibuya-ku, Tokyo Tokyu Construction Co., Ltd.

Claims (2)

[Claims] 1. An upper-section steel-framed column is built on a lower-section steel-framed column, splice plates are manually tightened by high-strength bolts at the connecting portions, and jack-mounting jigs are provided on the upper and lower steel-framed columns of the splice plate. At the same time as mounting, the jack is mounted between the jack mounting jigs, the position and the posture of the upper joint steel column are adjusted while the jack is expanded and contracted, and the high-strength bolt is finally tightened. Rehabilitation adjustment method. 2. The method for adjusting the installation of a steel frame pillar according to claim 1, wherein the jacks are attached to two side surfaces of the steel frame pillar which are orthogonal to each other and adjustment is performed in two directions.