JP5828572B2 - How to build steel columns - Google Patents

Description

  The present invention relates to a method for constructing a steel column. Specifically, the present invention relates to a method for constructing a steel column in which the column base of the steel column is embedded in a concrete frame and integrated.

  Conventionally, there is a structure in which a column base of a steel column is embedded and integrated in a concrete frame (see Patent Document 1). In this case, the steel column is constructed according to the following procedure. That is, a hole for accommodating the column base of the steel column is provided in the concrete frame. Next, level mortar is placed on the bottom surface of the hole, the column base portion of the steel column is inserted into the hole, and the bottom surface of the steel column is placed on the level mortar. Thereafter, concrete is placed in this hole, and the steel column is integrated with the concrete frame.

  According to this construction method, since the level mortar is placed on the bottom surface of the hole, the height of the steel column can be determined by placing the side surface of the steel column on the level mortar.

Japanese Patent Laid-Open No. 10-18300

  However, in the above method, when the hole for accommodating the column base of the steel column is narrow and deep, the level mortar cannot be placed with high accuracy, and as a result, it becomes difficult to accurately manage the height of the steel column. It was.

  An object of this invention is to provide the construction method of the steel column which can manage the height of a steel column easily and accurately, even when the hole which accommodates the column base part of a steel column is narrow and deep.

  The method for constructing a steel column according to claim 1 is a construction of a steel column in which a column base portion of a steel column (for example, a steel column 11 described later) is embedded in a concrete frame (for example, a foundation 20 described later) and integrated. A method of forming a hole (for example, a hole 22 described later) in an upper surface (for example, a floor surface 21 described later) of the concrete frame, and a level mortar (for example, a level mortar described later) around the hole. 24) and a step of attaching a temporary fixing member (for example, a temporary fixing member 12 described later) extending in a direction substantially orthogonal to the axial direction to the steel column, are performed in any order. Next, inserting the column base portion of the steel column into the hole, placing the temporary fixing member attached to the steel column on the level mortar, and placing the non-shrink mortar or concrete into the hole; Execute And wherein the door.

  According to this invention, the height of the steel column is determined by placing a level mortar around the hole and placing the temporary fixing member attached to the steel column on the level mortar. Therefore, even when the hole for accommodating the column base of the steel column is narrow and deep, the height of the steel column can be managed easily and accurately.

  According to the present invention, the height of the steel column is determined by placing a level mortar around the hole and placing the temporary fixing member attached to the steel column on the level mortar. Therefore, even when the hole for accommodating the column base of the steel column is narrow and deep, the height of the steel column can be managed easily and accurately.

It is a perspective view which shows the construction method of the pillar member which has the steel column which concerns on one Embodiment of this invention. It is an expansion perspective view of the pillar head of the pillar member which concerns on the said embodiment, and the erection adjustment member. It is an expansion disassembled perspective view which shows the accommodation of the column base part of the column member which concerns on the said embodiment.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing a construction method of a column member 10 having a steel column 11 according to an embodiment of the present invention.
In the present invention, a hole 22 is provided in the floor surface 21 of the foundation 20 as a concrete frame, and the column base portion of the steel column 11 of the column member 10 is inserted into the hole 22. Next, the erection of the steel column 11 is adjusted using the four erection adjusting members 30, and the steel column 11 is temporarily fixed to the foundation 20. Thereafter, a non-shrink mortar is placed in the hole 22 to integrate the steel column 11 with the foundation 20.

FIG. 2 is an enlarged perspective view of the column head of the column member 10 and the erection adjustment member 30. FIG. 3 is an enlarged exploded perspective view showing the storage of the column base portion of the column member 10.
The column member 10 is a steel column 11 that is a box column having a rectangular cross section extending in a substantially vertical direction, and four temporary fixings attached to each side surface at a predetermined height from the lower end of the column base of the steel column 11. And a member 12.

  A gusset plate 13 is provided on each side of the column head of the steel column 11, and a through hole is formed in each gusset plate 13.

  The temporary fixing member 12 is a grooved steel that is welded and fixed to each side surface of the column base of the steel column 11 and extends substantially horizontally, and is substantially perpendicular to each side surface of the steel column 11, that is, approximately in the axial direction of the steel column 11. It extends in the orthogonal direction. An opening 121 that is considerably larger than the bolt diameter of the anchor bolt 23 is formed on the bottom surface of each temporary fixing member 12.

The erection adjusting member 30 is screwed to the rod-shaped main body 31, the stigma connecting member 32 that is screwed to the upper end side of the main body 31 and connected to the column head of the column main body, and the lower end side of the main body 31. And a floor surface fixing member 33 that is fixed to the floor surface 21 of the foundation 20.
The stigma coupling member 32 is coupled to the gusset plate 13 of the column member 10 via a shackle 34.

The floor surface fixing member 33 is fixed to the floor surface 21 of the foundation 20 with a post-construction anchor 35.
The stigma coupling member 32 and the floor surface fixing member 33 are screwed in opposite directions. Therefore, by rotating the main body 31, the interval between the stigma coupling member 32 and the floor surface fixing member 33 changes, and the erection adjustment member 30 expands and contracts.

Next, the construction method of the column member 10 will be described.
In step 1, the foundation 20 is constructed as shown in FIG. Here, the box-shaped hole 22 which can accommodate the column base part of the column member 10 is formed in the floor surface 21 of the foundation 20 by removing the box when the concrete is placed on the foundation 20.

  In step 2, chemical anchors are placed as post-construction anchors at four locations corresponding to the openings 121 of the temporary fixing member 12 in the floor surface 21 of the foundation 20, and anchor bolts 23 protruding upward are provided.

  In step 3, a level mortar 24 whose top surface is substantially horizontal is placed around the four anchor bolts 23. Here, since the height of the column member 10 is determined by placing the temporary fixing member 12 of the column member 10 on the level mortar 24, the height of the upper surface of the level mortar 24 is set with high accuracy.

  In step 4, the column member 10 is lifted by a crane or the like, and the column base portion of the steel column 11 of the column member 10 is inserted into the hole 22 of the floor surface 21. At this time, the four anchor bolts 23 are inserted into the opening 121 of the temporary fixing member 12 and the bottom surface of the temporary fixing member 12 is placed on the level mortar 24.

  Although the height of the steel column 11 of the column member 10 is determined by placing each temporary fixing member 12 on the level mortar 24, the opening 121 of the temporary fixing member 12 is considerably larger than the outer diameter of the anchor bolt 23. Therefore, it is possible to adjust to some extent the horizontal erection such as the falling of the steel column 11 and the horizontal position.

In step 5, the four building adjustment members 30 are attached to the column heads of the steel column 11 of the column member 10, and the column heads of the steel column 11 are supported by the building adjustment members 30, and then the crane wires are removed. .
Next, the horizontal installation of the steel column 11 is adjusted by rotating the main body 31 of the building adjustment member 30 to expand and contract the building adjustment member 30.

In step 6, a square-shaped square plate 25 is prepared. The square plate 25 is formed with a circular opening 251 that is slightly larger than the outer diameter of the anchor bolt 23.
The anchor bolt 23 is inserted into the opening 251 of the square plate 25, and the square plate 25 is welded and fixed to the temporary fixing member 12. Next, a nut 26 is screwed into the anchor bolt 23 and the nut 26 is tightened. Thereby, the column member 10 is temporarily fixed to the foundation 20.

  In step 7, non-shrink mortar is placed in the hole 22 to integrate the steel column 11 of the column member 10 with the foundation 20.

According to this embodiment, there are the following effects.
(1) The height of the steel column 11 is determined by placing a level mortar 24 around the hole 22 and placing the temporary fixing member 12 attached to the steel column 11 on the level mortar 24. Therefore, even when the hole 22 for accommodating the column base portion of the steel column 11 is narrow and deep, the height of the steel column 11 can be managed easily and accurately.

  It should be noted that the present invention is not limited to the above-described embodiment, and modifications, improvements, etc. within a scope that can achieve the object of the present invention are included in the present invention.

DESCRIPTION OF SYMBOLS 10 ... Column member 11 ... Steel column 12 ... Temporary fixing member 13 ... Gusset plate 14 ... Level mortar 20 ... Foundation (concrete frame)
DESCRIPTION OF SYMBOLS 21 ... Floor surface 22 ... Hole 23 ... Anchor bolt 24 ... Level mortar 25 ... Square plate 26 ... Nut 30 ... Installation adjustment member 31 ... Main body 32 ... Pillar head connection member 33 ... Floor surface fixing member 34 ... Shackle 35 ... Post-construction anchor 121 ... Temporary fixing member opening 251 ... Square plate opening

Claims (1)

A method for constructing a steel column in which the column base of the steel column is embedded in a concrete frame and integrated,
Forming a hole in the upper surface of the concrete frame;
A step of providing anchor bolts around the hole by post-construction anchors and placing level mortar around the anchor bolts ;
A step of attaching a temporary fixing member extending in a direction substantially orthogonal to the axial direction to the steel column and having an opening formed therein is performed in any order, and then
Inserting the column base portion of the steel column into the hole, placing the temporary fixing member attached to the steel column on the level mortar, and inserting the anchor bolt into the opening of the temporary fixing member ;
A plate having an opening slightly larger than the outer diameter of the anchor bolt is prepared, the anchor bolt is inserted into the opening of the plate, and the plate is welded and fixed to the temporary fixing member. The process of tightening the nut on the bolt ;
And a step of placing non-shrinking mortar or concrete in the hole.

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