JP5721221B2 - Steel column construction method - Google Patents

Description

The present invention relates to a steel column mounting method for building a steel column.

  The embedded column base, which is one of the types of steel column bases, is relatively superior in terms of structural performance such as rigidity and proof strength. However, in the case of a general embedded column base method, the RC construction of the foundation is a steel column. Had to be started after it was brought into the field. However, this steel column may not be delivered by the necessary date due to delays in ordering or production, and there is a problem that construction work on site will be delayed if the delivery of steel columns is delayed. It was.

  Therefore, various methods have been proposed for steel column erection methods that solve such problems (see, for example, Patent Documents 1 and 2).

  FIG. 6 is a perspective view showing a conventional example of a steel column embedding method, in which reference numeral 100 indicates a hole (a hole in a box) for installing the steel column 102, and reference numeral 103 indicates the hole. Reinforcing bars arranged around 100 are shown, and reference numeral 104 denotes concrete placed so as to bury the reinforcing bars 103. The method shown in FIG. 6 is advantageous in that the foundation work (that is, the arrangement of the reinforcing bars 103 and the placement of the concrete 104) can be completed even if the steel column is not delivered, and it is difficult to depend on the delivery date of the steel column. is there.

Press Release “Development of Steel Column Base Box Construction Method“ SMART JOINT Construction Method ”-Jointly developed by Ando and Hazama-[Search May 9, 2011], Internet <http://www.hazama.co.jp/pressrelease /2005/050831.html> Hiroshi Nishihara, Takashi Tabata, and two others, “Experimental Study on Structural Performance of Steel Column Base Boxing Method (Part 1 Outline of Experiment)”, Annual Meeting of the Architectural Institute of Japan (Kinki), September 2005

  However, in the case of the conventional method shown in FIG. 6, the portion in which the steel column is to be embedded has to be unboxed, which requires a work using a mold or the like, and there is a problem that the work becomes complicated. In addition, it is necessary to arrange a large amount of reinforcing bars 103 around the hole for embedding a steel column, and there is a problem that the work of arranging the bars becomes complicated. Furthermore, although the height adjustment of the steel column is performed by the mortar 105 for height adjustment, there is a problem that the work becomes complicated.

An object of this invention is to provide the construction method of the steel column which can eliminate the above-mentioned problem.

The invention according to claim 1 is illustrated in FIG. 1 and FIG. 2, and includes a pipe part (10) made of a steel pipe, and a shaft of the pipe part (10) connected to the pipe part (10). A base member (1) having a rolled steel material (hereinafter referred to as "anchor portion") (11) extending in a direction (± x, ± y) substantially orthogonal to the direction (+ z), A step of installing the portion (10) so as to extend substantially vertically and the anchor portion (11) extending substantially horizontally;
Arranging the reinforcing bars (3) so as to surround the anchor portion (11);
Placing concrete (4) so as to embed the anchor portion (11) and the reinforcing bar (3);
Inserting the lower end portion of the steel column (2) into the pipe portion (10) to build the steel column (2);
It is screwed into a first nut member (see reference numeral 13 in FIG. 3 (b)) arranged on the side of the pipe part (10) and penetrates the pipe wall so as to pass through the inside of the pipe part (10) (FIG. 3). The horizontal position adjusting bolt (12) protruding substantially horizontally is operated by adjusting the amount of protrusion of the horizontal position adjusting bolt (12) to the inside of the pipe part (10). Adjusting the horizontal position of the steel column (2) by:
Placing the concrete inside the pipe part (10) (see symbol S in FIG. 3 (b)) and fixing the steel column (2) ,
A support member (5) having a first through hole (not shown) penetrating vertically is placed on the upper edge of the pipe portion (10),
Forming a second through hole (2a) penetrating vertically at a position corresponding to the lower side of the first through hole on the steel column (2) side;
The vertical position adjusting bolt (6) is disposed so as to be inserted through the first through hole and the second through hole (2a),
One of the portion where the first through hole is formed and the portion where the second through hole (2a) is formed is such that the vertical position adjusting bolt (6) does not move to the other side. The position adjustment bolt (6) is supported rotatably,
On the other side, a second nut member (not shown) screwed to the vertical position adjusting bolt (6) is disposed,
The vertical position of the steel column (2) is adjusted by operating the vertical position adjusting bolt (6) .

  The invention according to claim 2 is illustrated in FIG. 3B, and in the invention according to claim 1, the horizontal position adjusting bolt (12) presses the steel column (2) from at least four directions. It is characterized by being arranged in.

  The invention according to claim 3 is illustrated in FIG. 1 and FIG. 2. In the invention according to claim 1 or 2, a plurality of the horizontal position adjusting bolts (12) are arranged at different heights. The steel column (2) is constructed so that the erection angle can be adjusted.

  Note that the numbers in parentheses are for the sake of convenience indicating the corresponding elements in the drawings, and therefore the present description is not limited to the descriptions on the drawings.

According to the first aspect of the present invention, the foundation work (that is, the placement of the reinforcing bars and the placement of the concrete) can be completed even if the steel column is not carried to the site. There is a merit that it is not affected. In addition, according to the present invention, it is not necessary to remove the pipe portion functioning as a mold after the concrete is placed, so that the work is simplified correspondingly. Furthermore, since the fixing of the pipe part is performed not only by the reinforcing bars embedded around the pipe part but also by an anchor part connected to the pipe part, the number of reinforcing bars can be reduced as compared with the case where the anchor part is not used. It is possible to simplify the bar arrangement work. Still further, according to the present invention, since the hole for installing the steel column is formed by a pipe portion made of a steel pipe, the horizontal position adjusting bolt as described above can be provided using the pipe portion. . As a result, the horizontal position and the like of the steel column can be easily adjusted simply by rotating the horizontal position adjusting bolt clockwise or counterclockwise.

  According to the invention which concerns on Claim 2, the position adjustment of this steel column can be performed with respect to four directions by rotating each horizontal position adjustment bolt.

  According to the invention which concerns on Claim 3, the erection angle of the said steel column can be adjusted.

Moreover, according to the invention which concerns on Claim 1 , even if it does not use the mortar for height adjustment, the height adjustment of a steel column can be easily performed only by operating the said vertical position adjustment volt | bolt.

FIG. 1 is a perspective view showing an example of the configuration of a base member and a steel column used in the present invention. FIG. 2 is a vertical sectional view showing an example of a steel column erection method according to the present invention. 3A is a cross-sectional view taken along the line AA in FIG. 2, and FIG. 3B is a cross-sectional view taken along the line BB in FIG. FIG. 4 is a plan view showing an example of a steel column erection method according to the present invention. FIG. 5 is an exploded perspective view showing an example of the structure of the base member. FIG. 6 is a perspective view showing a conventional example of a steel column embedding method.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 5.

The steel column embedding method according to the present invention is a method of building a steel column when building a building (for example, an apartment house, an office building, a factory, a warehouse, a commercial facility, etc.), and is exemplified in FIG. Such a member (a member arranged at least partially embedded in the concrete 4 and configured to support the lower end portion of the steel column 2, in the present specification, a “base member”. This is a method of building a steel column 2 using 1. This base member 1 is
A pipe section 10 made of steel pipe;
A rolled steel material 11 (hereinafter referred to as “anchor portion”) 11 connected to the tube portion 10 and extended in the directions ± x and ± y substantially orthogonal to the axial direction + z of the tube portion 10 When,
have. As will be described later, in this base member 1, the tube portion 10 extends substantially in the vertical direction (that is, the axial direction + z faces substantially upward), and the anchor portion 11 extends in a substantially horizontal direction. (That is, the directions ± x and ± y are directed substantially in the horizontal direction). The anchor portion 11 is arranged in a state of being embedded in the concrete 4 as will be described later.

  By the way, in the base member 1 shown in FIG. 1, the number of the anchor portions 11 is four, but of course it is not limited to this, and may be five or more or three or less. In addition, the anchor portion 11 shown in FIG. 1 is set so that the included angle θ is approximately 90 degrees, but of course it is not limited to this, and may be an arbitrary angle. Furthermore, examples of the rolled steel material used for the anchor portion 11 include a shape steel such as an H-shaped steel and a T-shaped steel, or a bar steel.

  On the other hand, although the pipe part 10 shown in FIG. 1 is what is called a square steel pipe, of course, it is not restricted to this, As long as the lower end part of the steel column 2 can be inserted, another shape may be sufficient.

  On the other hand, a bolt (referred to as “horizontal position adjusting bolt” in this specification) 12 for adjusting the horizontal position of the inserted steel column 2 is attached to the pipe portion 10. That is, the tube wall of the tube portion 10 has a through hole (a through hole that is horizontally penetrated as indicated by reference numeral 10a in FIG. 3 (b), hereinafter referred to as a “third through hole” as appropriate). The horizontal position adjusting bolts 12 are formed substantially horizontally in a state of being inserted through the third through holes 10a. Therefore, the horizontal position adjusting bolt 12 penetrates the tube wall and protrudes substantially horizontally into the interior S of the tube portion 10. Further, a nut member (hereinafter referred to as “first nut member”) 13 is disposed on the tube portion 10 side so as to substantially coincide with the third through hole 10 a, and the horizontal position adjusting bolt 12. Is screwed into the first nut member 13 and is rotatably supported. Therefore, when the horizontal position adjusting bolt 12 is rotated clockwise or counterclockwise, the amount of protrusion (that is, the amount of protrusion to the inside S of the tube portion 10) also changes. The horizontal position of can be adjusted.

And the construction method of the steel column which concerns on this invention is equipped with the following processes. That is,
As shown in FIG. 2, the step of installing the base member 1 so that the pipe portion 10 of the base member 1 described above extends substantially in the vertical direction and the anchor portion 11 extends in the substantially horizontal direction. A step of arranging a reinforcing bar (see reference numeral 3 in FIG. 2) so as to surround the anchor part 11 A step of placing concrete 4 so as to bury the anchor part 11 and the reinforcing bar 3 A lower end of the steel column 2 The step of inserting the steel part 2 into the pipe part 10 and installing the steel column 2 The inside of the pipe part 10 of the horizontal position adjusting bolt 12 by rotating the horizontal position adjusting bolt 12 clockwise or counterclockwise. Adjusting the horizontal position of the steel column 2 by adjusting the amount of protrusion to S. Concrete inside the tube portion 10 (that is, between the inner peripheral wall of the tube portion 10 and the steel column 2). To fix the steel column 2 Degree

  According to the present invention, the foundation work (that is, the placement of the reinforcing bars 3 and the placement of the concrete 4) can be completed even if the steel column is not carried to the site. There is merit that we do not receive. Further, according to the present invention, it is not necessary to remove the pipe portion 10 functioning as a mold after the concrete is placed, so that the work is simplified accordingly. Furthermore, since the fixing of the pipe portion 10 is performed not only by the reinforcing bars 3 embedded around the pipe portion 10 but also by the anchor portions 11 connected to the pipe portion 10, the number of reinforcing bars is larger than that of the conventional method shown in FIG. Can be reduced, and the bar arrangement work is simplified. Furthermore, according to the present invention, since the hole for installing the steel column 2 is formed in the pipe portion 10 made of a steel pipe, the horizontal position adjusting bolt 12 as described above is used by using the pipe portion 10. Can be provided. As a result, the horizontal position and the like of the steel column 2 can be easily adjusted simply by rotating the horizontal position adjusting bolt 12 clockwise or counterclockwise.

  Incidentally, the horizontal position adjusting bolt 12 is preferably arranged so as to press the steel column 2 from at least four directions as illustrated in FIG. 3B. In such a case, the position adjustment of the steel column 2 can be performed in four directions by rotating each horizontal position adjustment bolt 12.

  Also, a plurality of the horizontal position adjusting bolts 12 described above may be arranged at different heights as illustrated in FIGS. 1 and 2. In such a case, the erection angle of the steel column 2 can be adjusted.

  On the other hand, as illustrated in FIGS. 1 and 2, a support member 5 having a first through hole (not shown) penetrating vertically is placed on the upper edge of the tube portion 10, and on the steel column 2 side. A second through hole (see reference numeral 2a in FIG. 1) penetrating vertically is formed at a position corresponding to the lower side of the first through hole, and is inserted into the first through hole and the second through hole 2a. The vertical position adjusting bolt 6 may be arranged so The vertical position adjusting bolt 6 does not move to the other side of either the portion where the first through hole is formed (that is, the support member 5) or the portion where the second through hole 2a is formed. In such a state, the vertical position adjusting bolt 6 is rotatably supported, and a second nut member (not shown) screwed to the vertical position adjusting bolt 6 is disposed on the other side. It is preferable that the vertical position of the steel column 2 is adjusted by operating the vertical position adjusting bolt 6. In such a case, the height adjustment of the steel column can be easily performed only by operating the vertical position adjusting bolt 6 without using a mortar for height adjustment.

  In this example, the ground into which the steel column 2 was built was excavated to the bottom of the foundation, crushed with stone (see reference numeral 7 in FIG. 2), and discarded concrete 8 was cast. The thickness of crushed stone was 100 mm, and the thickness of discarded concrete was 50 mm.

  Next, the base member 1 having the structure shown in FIG. 1 was produced. That is, as shown in FIG. 5, a 150 mm × 150 mm H-shaped steel (anchor part) 11 is assembled in a cross shape, a rectangular steel pipe 10A is welded to the intersecting part, and a steel piece 10B is welded below the steel pipe 10A. did. Note that twelve horizontal position adjusting bolts 12 described above were attached to the base member 1, and the base member 1 was discarded and placed on the concrete 8 so that the pipe portion 10 was extended substantially in the vertical direction.

  Then, as shown in detail in FIG. 4, the reinforcing bar 3 is arranged so as to surround the anchor part 11, and the concrete 4 is placed so as to bury the anchor part 11 and the reinforcing bar 3 to form a footing. .

  On the other hand, a base plate (see reference numeral 2b in FIG. 1) having a second through hole 2a is attached to the bottom surface of the steel column 2, and a bowl-shaped member 2c is projected below the base plate 2b. . When the steel column 2 was carried into the site, the lower end portion of the steel column 2 was inserted into the pipe portion 10 and the steel column 2 was built. Thereafter, the horizontal position adjusting bolt 12 is rotated clockwise or counterclockwise to adjust the amount of protrusion of the horizontal position adjusting bolt 12 into the inside S of the pipe portion 10, thereby adjusting the horizontal position of the steel column 2. Adjusted. Further, two support members 5 (75 × 75 × 6 equilateral mountain steel) having a first through hole are placed on the upper end surface of the tube portion 10, and the first through hole and the second The vertical position adjusting bolt 6 was inserted into the through hole 2a, and the bolt 6 was rotated to adjust the height of the steel column 2.

  Thus, after adjusting the horizontal position and height of the steel column 2 to an appropriate position, concrete (or mortar) was cast in the inside S of the pipe part 10, and this steel column 2 was fixed. At that time, the above-described bowl-shaped member 2c is embedded in the concrete, and functions to resist an external force trying to pull out the steel column 2.

DESCRIPTION OF SYMBOLS 1 Base member 2 Steel column 2a 2nd through-hole 3 Reinforcement 4 Concrete 5 Support member 6 Vertical position adjustment bolt 10 Pipe part 11 Anchor part 12 Horizontal position adjustment bolt 13 1st nut member + z Axial direction of pipe part

Claims (3)

A base member having a pipe portion made of a steel pipe and a rolled steel material (hereinafter referred to as “anchor portion”) connected to the pipe portion and extending in a direction substantially orthogonal to the axial direction of the pipe portion. A step of installing the pipe portion so as to extend in a substantially vertical direction and the anchor portion so as to extend in a substantially horizontal direction;
Arranging a reinforcing bar so as to surround the anchor part;
Placing concrete so as to bury the anchor part and the reinforcing bar;
Inserting the lower end of the steel column into the pipe part and building the steel column;
The horizontal position adjustment is performed by operating a horizontal position adjusting bolt which is screwed into a first nut member arranged on the side of the pipe part and penetrates the pipe wall and protrudes substantially horizontally into the pipe part. Adjusting the horizontal position of the steel column by adjusting the amount of protrusion of the bolt into the tube part; and
Placing the concrete inside the pipe portion and fixing the steel column; and
Equipped with a,
A support member having a first through-hole penetrating vertically is placed on the upper edge of the pipe part,
Forming a second through-hole penetrating vertically at a position corresponding to the lower side of the first through-hole on the steel column side;
The vertical position adjustment bolt is arranged so as to be inserted into these first through hole and second through hole,
Either the portion where the first through hole is formed or the portion where the second through hole is formed can freely rotate the vertical position adjusting bolt in a state where the vertical position adjusting bolt does not move to the other side. To support
On the other side, a second nut member screwed to the vertical position adjusting bolt is disposed,
Adjusting the vertical position of the steel column by operating the vertical position adjustment bolt;
A steel column construction method characterized by this. The horizontal position adjustment bolt is arranged to press the steel column from at least four sides.
The steel column embedding method according to claim 1. A plurality of the horizontal position adjustment bolts are arranged at different heights, and configured to be able to adjust the erection angle of the steel column,
The steel column embedding method according to claim 1 or 2.

Images