JPH0427045A - Method for constructing steel frame column base - Google Patents

Abstract

PURPOSE:To easily adjust the perpendicularity of a steel frame pillar by turning the nut of a pillar inclination adjusting device between the base section of the steel frame pillar set to a prescribed position and an already existing member of wall, etc. CONSTITUTION:Dowels 3 for positioning are arranged on the surface of a foundation which comes into contact with the bottom surface a steel frame pillar A. Each of the bolts 10 a pillar inclination adjusting device composed of the bolts 10 with long nut is welded to the outer peripheral surface 4 of the pillar corresponding to the upper section of a box-shaped recessed section (a), with one piece of the bolts being used to each peripheral surface an inserted into the recessed section (a). The pillar A is set to a prescribed position by putting the dowels 3 in dowel holes 8 bored into a base plate 7. Then the perpendicularity of the pillar A is adjusted by turning long nuts 9 against the bolts 10 and pressing the nuts 9 against angles 11 fixed in a base beams 2. Therefore, the constructing accuracy of the pillar A can be improved.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a method of constructing a steel column base.

(Prior Art) When constructing a steel frame column, in the case of a recessed column base, the foundation concrete of the column base is often boxed out and the steel frame is erected.

In this case, the steel frame for the column base must have been set at the time of 1 & foundation and underground beam concrete pouring.

For this reason, it is necessary to order and deliver steel frames early.

However, at present, such a process is nearly impossible, and the method of box-cutting concrete is becoming more common.

(Problem to be solved by the invention) In the case of a recessed column base, the embedding depth of the steel column is 2 to 3 times the column diameter.
double is required. In addition, workability will improve if the planar dimensions of the box cutout are made larger, but the width of the horizontal haunch becomes larger in order to arrange the main reinforcing bars of the underground beam, which is not economical. Therefore, for economical construction, it is necessary to make the cutout cross section as small as possible, but this makes it extremely difficult to set the steel column in the correct position.

The present invention was proposed in view of these circumstances, and its purpose is to facilitate the positioning of steel columns.
The object of the present invention is to provide a construction method for steel frame column bases that improves construction accuracy and shortens the construction period.

(Means for Solving the Problems) In order to achieve the above-mentioned object, according to the method for constructing a steel column base according to the present invention, a thick piece for positioning the steel column base is installed at the upper end of the foundation in contact with the lower end surface of the column base of the steel column. A steel column is erected on the foundation, with a handle provided, a large hole drilled in the lower end surface of the column base, and a column inclination adjustment device mounted on the outer peripheral surface of the upper part of the column base;
Insert the large hole in the lower end of the front column leg into the thick hole at the top of the foundation,
After adjusting the uprightness of the steel column by the column inclination adjustment device interposed between the column base and an existing member constructed around the column base, concrete is poured around the column base. This is to fix the column base by installing the base.

(Function) According to the present invention, as described above, a thick handle for positioning a steel column leg is provided in advance at a predetermined position on the upper end surface of the foundation that is in contact with the lower end surface of the column leg of the steel column. A steel column is erected in the column, and the steel column is set in a predetermined position by fitting the large hole on the lower end surface of the column base into the thick hole.

Furthermore, it is mounted on the upper part of the column base of the steel column, and the column base and
The degree of uprightness of the steel column is adjusted by the column inclination adjustment device interposed between the existing strong members such as foundation beams and walls around the column base, and the steel column is thus placed in a predetermined position on the foundation. After the column is erected, concrete is placed around the base of the column to secure it to the foundation.

(Example) The present invention will be described below with reference to the illustrated embodiments.

(1) is the foundation, and (2) is the foundation beam.The concrete for each part will be cut out and poured.

A positioning hole (3) is provided on the bottom surface of the steel frame column in contact with the lower end surface of the column base in the box cutout (a).

Figure 3 shows the details of the mounting part of Taina (3), and the foundation (1).
A level adjustment nut (5) is screwed onto the upper threaded part of the anchor bolt (4) fixed to the anchor, and the female threaded hole provided with the conical thick handle (3) is inserted into the anchor bolt (4). Screw onto the upper end of the bolt (4), adjust the level with the nut (5), and level mortar (6) a.

Heath plate (
7) Large holes (8) are drilled at predetermined positions in the four columns, and one long nut (9) is attached to each of the four outer circumferential surfaces located above the box cutout (a) in the column base. bolts (10
), and a bolt (10) is welded to the column base.Instead of welding the bolt (10), it may be made detachable using a magnet.

Then, the column base of the steel column constructed as described above is built into the box cutout (a), and the thick shaft (8) is inserted into the thick hole (8).
3) to set the steel frame column A in a predetermined position, and then adjust the long nut (9) of the column tilting device to the bolt (10) so that it is fixed in the foundation beam (2). The verticality of the steel column A is adjusted by crimping it onto the angle material (11).

In the illustrated embodiment, the column tilting device is interposed between the column base and the foundation beam (2), but it may also be interposed between an existing member such as a wall.

After the erection of the steel column A is thus completed, concrete is poured into the boxed portion (a) and the column base is fixed to the foundation.

Note that (12) in the figure is a stand bolt installed at the base of the column.

(Effects of the Invention) According to the present invention, as described above, when a steel column is erected, the large hole on the lower end surface of the column base of the steel column is fitted into the thick hole for positioning provided in advance at the upper end of the foundation. The steel column is positioned by this, and the upright degree of the steel column is adjusted by a column inclination adjustment device mounted on the outer peripheral surface of the column base and interposed between existing members around the column base. After the adjustment, concrete is placed around the base of the column, which improves the accuracy of erecting the steel column, shortens the construction period, and facilitates construction management.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing the implementation status of one embodiment of the construction method for steel frame column bases according to the present invention, Fig. 2 is a cross-sectional plan view thereof, and Fig. 3
The figure is a vertical sectional view showing details of the mounting part of the large positioning part.
The figure is a longitudinal sectional view showing details of the column inclination adjustment device. (1)...Foundation, (2)...Foundation beam,
(3)...Taimuchi, (4)...Anchor bolt, (7)...Base plate, (8)...
...Major inner hole, (9)...Long nut, (1
0)...Bolt. Agent: Patent attorney Shige Okamoto (1 person) Figure 2, Ward 3, Figure 4

Claims (1)

[Claims] A thick hole for positioning the steel column base is provided at the upper end of the foundation that is in contact with the lower end surface of the column base, a thick hole is drilled in the lower end surface of the column base, and a column A steel column equipped with an inclination adjustment device is erected on the foundation, and the thick hole on the lower end of the front column leg is fitted into the thick hole on the upper end of the foundation, and After adjusting the uprightness of the steel column using the column inclination adjustment device interposed between the column and the existing member, concrete is poured around the column base to fix the column base. A construction method for steel frame column bases featuring: