JP2016079783A - Construction method and instrument used therewith - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simple method for accurately installing a column base and an instrument used therefor, in a construction process using a structural steel.SOLUTION: A clearance between an anchor bolt and an open hole, or a relative positional relationship between the anchor bolt and the open hole, is adjusted in the following steps of: fitting open holes 8a, 8b, 8c, 8d formed through a column base 7 onto anchor bolts 3a, 3b, 3c, 3d having a column base position adjustment collar 1 fitted thereon beforehand, the column base position adjustment collar having a tubular form where an inner periphery and an outer periphery of a cross-section are in eccentricity; then, rotating or moving in a horizontal direction the column base position adjustment collar 1. This allows a position of the column base 7 to be adjusted as designed. The clearance may be adjusted by installing a female screw that pierces through the inner periphery and the outer periphery of the column base position adjustment collar 1, and using a male screw screwed on the female screw.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method for fixing a steel column base using anchor bolts embedded in foundation concrete in a building process, and a column base position adjusting device used therefor.

  The structure of buildings using steel columns and beams is roughly divided into a ramen structure and a pin structure. In addition to the conventional method of welding members such as columns and beams at a factory and installing them at a construction site, a well site method of welding at a construction site is also being carried out.

The following matters are mentioned as problems in these construction methods.
(1) In steel frame construction, the column base is installed with reference to the anchor bolt that fixes the column. Usually, the outer diameter of the anchor bolt and the through holes of the column base provided for inserting the anchor bolt are used. Since a certain clearance is provided between the inner diameter and the inner diameter, simply mounting the through hole of the column base to the anchor bolt cannot be installed at an accurate position.
(2) It is extremely difficult to correct the position of the anchor bolt once installed.
(3) If the pillar base position cannot be set accurately, it is difficult to adapt the pillar construction to the drawing.

  As an example of means for solving this, Patent Document 1 discloses a technique of using a conical nut to align the core of a through hole for inserting a pillar-based anchor bolt with the core of the anchor bolt. However, in this technique, it is necessary to accurately determine the installation position of the anchor bolt, and there is a point that does not necessarily meet the above problem.

  Patent Document 2 discloses a technique for adjusting the base position of a column using a ball screw and a motor. However, with this technique, it is assumed that the entire apparatus is slightly larger and its use is restricted.

  Furthermore, the present inventor disclosed in Patent Document 3 that a column base that can be fixed with a mortar after finely adjusting the installation position of the column base to the position of the column base using a formwork connecting bolt attached to the formwork. A method has been proposed in which a positioning bolt is installed and a hole previously drilled in the core of the column base is fitted into the positioning bolt. However, this method still has room for improvement from the viewpoint of reducing the number of parts.

  Japanese Patent Laid-Open No. 10-168897   Japanese Patent Application Laid-Open No. 07-292989   Japanese Patent No. 50777856

  Therefore, the subject of this invention is providing the simple method and equipment used for it which can install column base correctly in the construction process using a steel frame.

  In the present invention, as described above, there is a certain clearance between the outer diameter of the anchor bolt and the inner diameter of the through hole of the column base provided for inserting the anchor bolt. It was made as a result of considering proper adjustment and determining the exact position where the column base should be installed.

That is, the present invention includes a step of attaching a cylindrical column base position adjusting collar to an anchor bolt for fixing a column base, one end of which is embedded in the foundation concrete.
The column base is provided on the foundation concrete or the foundation concrete by fitting a through hole for insertion of the anchor bolt provided on the column base to the anchor bolt equipped with the column base position adjusting collar. The process of installing on the base mortar,
Adjusting the position of the column base by adjusting the relative position of the outer periphery of the column base position adjusting collar on the inner periphery of the through hole;
It is a construction method characterized by having.

  Moreover, this invention is the said construction method characterized by including the process of inserting the spacer of the substantially same height as the said base mortar under the said pillar base position adjustment collar.

  Further, in the present invention, at least one of the column base position adjusting collars has an inner diameter larger than an outer diameter of the anchor bolt, and is provided with a female screw penetrating between an inner periphery and an outer periphery in at least one place. The construction method is characterized in that the relative position between the inner periphery of the column base position adjusting collar and the anchor bolt can be adjusted by a male screw screwed into the female screw.

In addition, the present invention, before installing the column base on the foundation concrete or the base mortar provided in the foundation concrete,
A step of inking the ink of the pillar base on the surface of the base mortar,
A step of placing the anchor bolt insertion hole and applying a template of the pillar base ink on the pillar base, aligning the pillar ink on the pillar ink, and placing the template on the base mortar;
The construction method according to claim 1, further comprising a step of removing the template after selecting the column base position adjusting collar that fits the gap between the insertion hole and the anchor bolt, and setting at least two of the collars. It is.

  In addition, the present invention provides the column base position adjusting collar for the construction method described above, which has a cylindrical shape in which the center of the inner periphery and the outer periphery of the cross section perpendicular to the height direction is the same.

  In addition, the present invention is the column base position adjusting collar for a construction method described above, which has a cylindrical shape in which an inner periphery and an outer periphery of a cross section perpendicular to the height direction are eccentric.

  Moreover, this invention is the said column base position adjustment collar for construction methods characterized by providing the internal thread which penetrates between inner periphery and outer periphery in at least one place.

  Moreover, this invention has the latching | locking part for extracting to upper direction in at least one part of outer periphery, The said column base position adjustment collar for the construction methods characterized by the above-mentioned.

  In the construction method of the present invention, the column base position adjustment is performed because the column base position adjustment collar having a cylindrical shape whose inner periphery and outer periphery are eccentric is mounted on the outer periphery of the anchor bolt in advance. By adjusting the position of the collar and adjusting the threaded state of the male screw threaded into the female screw provided on the pillar base position adjustment collar, the outer circumference of the anchor bolt and the penetration of the pillar base The clearance with the inner periphery of the hole can be adjusted. That is, the column base can be accurately installed at the position as designed.

  The perspective view for demonstrating an example of the installation method of the pillar base which concerns on this invention.   FIG. 2A is a perspective view, FIG. 2B is a plan view, and FIG. 2C is a side cross-sectional view, illustrating an example of a column base position adjusting collar used in the present invention.   The figure which shows an example which provided the internal thread in the column base position adjustment collar used for this invention, FIG.3 (a) is a top view, FIG.3 (b) is a front view, FIG.3 (c) is sectional drawing of a side surface .   The perspective view which shows an example of the spacer used for this invention.   FIG. 5A is a plan view and FIG. 5B is a perspective view of an example in which a column base position adjusting collar used in the present invention is prepared with a low height without eccentricity.   FIG. 6 (a) is a plan view and FIG. 6 (b) is a perspective view of an example in which a column base position adjusting collar used in the present invention is prepared with an eccentricity and a low height.   The figure which shows an example in the case of performing the next process, with the column base position adjusting collar fitted to the anchor bolt in the column base installation method according to the present invention.

  Next, embodiments of the present invention will be described with reference to specific drawings.

  FIG. 1 is a perspective view for explaining an example of a column base installation method according to the present invention. In FIG. 1, 1 is a column base position adjusting collar, 2 is a spacer for adjusting the height of the column base position adjusting collar, 3a, 3b, 3c, 3d are anchor bolts, 4 is foundation concrete, and 5 is a column. A base mortar provided at a position where the base is installed, 6 is a column, 7 is a column base, and 8a, 8b, 8c, and 8d are through holes for inserting anchor bolts. 9 is a template, 10a, 10b, 10c, and 10d are insertion holes for anchor bolts provided in the template, 11a is a pillar core ink, and 11b is a pillar passing ink.

  Here, in order to make positioning easier, the pillar core ink of the template 9 which has been subjected to the pillar ink in advance on the base mortar 5 and the ink of the pillar core ink is aligned with the pillar ink 11b. An example of installation is shown. In this case, a column base position adjusting collar that fits the gap with the anchor bolt is selected and set in at least two of the insertion holes 10a, 10b, 10c, and 10d, and preferably on the diagonal line. After the installation position of 7 is determined, the template 9 is removed. This procedure is the same whether the column base position adjusting collar is removed after the column 6 is installed, or when the column 6 is left embedded.

  1 shows an example in which the column base position adjusting collar 1 is attached to only one of the four anchor bolts 3a, 3b, 3c, and 3d for convenience of explanation. Usually, the base mortar 5 is provided on the foundation concrete for the purpose of improving the stability of the column 6. In this case, the amount necessary for adjustment work is determined from the through holes 8 a, 8 b, 8 c, 8 d of the column base. Therefore, the spacer 2 is used because the column base position adjusting collar 1 is not exposed. As the spacer 2, it is desirable to use a ring-shaped spacer having a notch portion as will be described later for the convenience of removal after the work is completed.

  However, if it is not necessary to remove, it is possible to use a washer or the like by overlapping the necessary height. In addition, since the pillar base position adjusting collar 1 is not one type of the outer diameter of the anchor bolts 3a, 3b, 3c, 3d and the inner diameter of the through holes 8a, 8b, 8c, 8d, For example, it is necessary to keep the same size in 0.5 mm increments, or to prepare items with different degrees of eccentricity.

  If the template 9 is not used, the column base 7 is positioned using a laser measuring instrument or the like. At this time, the column base position adjusting collar 1 is rotated or moved in the horizontal direction. Thus, the installation position of the column base 7 can be finely adjusted. Thereafter, a nut (not shown) is screwed onto the anchor bolts 3a, 3b, 3c, and 3d and sufficiently tightened to fix the column base 7.

  In that case, remove the two column base position adjustment collars and spacers at the diagonal positions, screw and tighten the nuts, and then remove the remaining two column base position adjustment collars and spacers, Similarly, the nut 7 is tightened to fix the column base 7. By tightening the nut in such a manner, the position of the other through hole is not shifted by the force applied to the column base when tightening one nut.

  2A and 2B are diagrams showing an example of a column base position adjusting collar used in the present invention. FIG. 2A is a perspective view, FIG. 2B is a plan view, and FIG. 2C is a side sectional view. is there. In FIG. 2, 12 is a column base position adjusting collar, 13 is a slit, 14 is a tapered portion, 15 a and 15 b are for extracting the column base position adjusting collar 12 upward after installing the column berth 7. It is a locking part.

  In this example, as shown in FIG. 2B, the circle constituting the inner circumference is eccentric to the upper side in the figure. The slit 13 is provided to reduce the outer diameter of the column base position adjusting collar 12 after the position adjustment of the column base 7 is completed, thereby facilitating the removal operation. Needless to say, the tapered portion 14 is provided in order to facilitate insertion into the through holes 10a, 10b, 10c, and 10d of the column base 7.

  FIGS. 3A and 3B are diagrams showing an example of a column base position adjusting collar used in the present invention, in which an internal thread is provided. FIG. 3A is a plan view, FIG. 3B is a front view, and FIG. FIG. 3 is a side sectional view. In FIG. 3, 16 is a column base position adjusting collar, 17 is a slit, 18 is a blind hole when machining the slit, 19 is a female screw for screwing a hexagon socket set screw, and 20 is a male anchor bolt. An iron plate 21 for preventing screw damage is a tapered portion.

  In this example, the relative position between the anchor bolt and the column base position adjusting collar 16 can be adjusted by pushing the anchor bolt with a hexagon socket set screw. In this adjustment work, the anchor bolt is pushed in with the hexagon socket set screw, so the male screw of the anchor bolt may be damaged at the tip of the hexagon socket set screw, and the iron plate 20 protects the anchor bolt male screw. To do.

  The iron plate 20 can be fitted in a groove provided on the inner peripheral side of the slit 17 of the column base position adjusting collar 16. The function of the slit 17 is the same as that shown in FIG. In addition, the iron plate 20 can also be joined to either the upper end or the lower end of the groove by a method such as welding so as not to drop off.

  FIG. 4 is a perspective view showing an example of a spacer used in the present invention. In FIG. 4, 22 is a spacer and 23 is a notch. The spacer 22 is used as shown in FIG. 1 to support the lower part when the column base 7 needs to lift the column base position adjusting collar 1 by the height of the base mortar 5. Use. Further, by providing the notch 23, the spacer 22 can be easily removed after the column base 7 installation position adjustment operation is completed.

  Further, as a matter of course, the column base position adjusting collar according to the present invention can be advanced to the subsequent process while being fitted to the anchor bolt after the column base position is adjusted. FIG. 5 is a view showing an example of a column base position adjusting collar used in the present invention prepared with no eccentricity and a low height, FIG. 5 (a) is a plan view, and FIG. 5 (b) is a perspective view. is there.

  When fixing the column base with the column base alignment collar fitted to the anchor bolt, if the top of the column base alignment collar protrudes above the surface of the column base, it will hinder subsequent operations. Therefore, it is necessary to keep the overall height low, so it is designed with the height kept low.

  FIGS. 6A and 6B are diagrams showing an example of the column base position adjusting collar used in the present invention that is eccentric and prepared with a low height. FIG. 6A is a plan view and FIG. 6B is a perspective view. FIG. In FIG. 6, reference numeral 24 denotes a hexagon socket set screw for adjusting the relative position between the anchor bolt and the column base position adjusting collar, and 25 denotes the outer diameter and eccentric dimensions of the column base position adjusting collar. It is a specification display section that displays specifications such as. By providing the specification display 25, it is not necessary to check the dimensions and the degree of eccentricity each time, so that the work at the site can be performed more smoothly.

  In this case, since there is an eccentricity, the relative position between the anchor bolt and the column base position adjusting collar can be adjusted using the hexagon socket set screw 24. In this case, since the next step is performed with the column base position adjusting collar fitted to the anchor bolt, the iron plate 20 for protecting the male screw of the anchor bolt shown in FIG. 3 may not be provided. In addition, after the position adjustment, the column base position adjustment collar can be fixed and removed using an adhesive or the like.

  FIG. 7 is a diagram illustrating an example of a case where the next process is performed with the column base position adjusting collar fitted to the anchor bolt in the column base installation method according to the present invention. In FIG. 7, 26 is a column, 27 is a column base, 28 is an anchor bolt, 29 is a column base position adjusting collar, 30 is a base mortar, and 31 is foundation concrete. As shown here, when embedding the column base position adjusting collar 29, it is necessary to prevent the top portion of the column base position adjusting collar 29 from protruding above the surface of the column base 27.

  As described above, according to the present invention, it is possible to provide a method for adjusting the installation position of a column on foundation concrete in a steel building and equipment used therefor by a simple method. The present invention is not limited to the above-described embodiment, and does not depart from the gist of the present invention, including various modifications and corrections that can be conceived by those having ordinary knowledge in the field of the present invention. Of course, even if there is a design change in the range, it is included in the present invention.

1, 12, 16, 29 ... Column base position adjusting collars 2, 22 ... Spacers 3a, 3b, 3c, 3d, 24 ... Anchor bolts 4, 31 ... Foundation concrete 5,30 ... · Base mortar 6, 26 ··· Columns 7 and 27 · · · Column bases 8a, 8b, 8c and 8d ... Through holes 10a, 10b, 10c and 10d ... Insertion holes 11a ... Pillar ink core 11b ················································································································· TAPE Iron plate 23 ... Notch 24 ... Hexagon socket head set screw 25 ... Specification display

Claims (8)

A process of attaching a cylindrical column base position adjusting collar to an anchor bolt for fixing the column base, one end of which is embedded in the foundation concrete,
The column base is provided on the foundation concrete or the foundation concrete by fitting a through hole for insertion of the anchor bolt provided on the column base to the anchor bolt equipped with the column base position adjusting collar. The process of installing on the base mortar,
Adjusting the position of the column base by adjusting the relative position of the outer periphery of the column base position adjusting collar on the inner periphery of the through hole;
The construction method characterized by having.   2. The construction method according to claim 1, further comprising a step of inserting a spacer having substantially the same height as the base mortar under the pillar base position adjusting collar.   At least one of the column base position adjusting collars has an inner diameter larger than the outer diameter of the anchor bolt, and is screwed into the female screw by providing a female screw penetrating between the inner periphery and the outer periphery in at least one place. The construction method according to claim 1, wherein a relative position between an inner circumference of the column base position adjusting collar and the anchor bolt can be adjusted by a male screw. Before installing the column base on the foundation concrete or base mortar provided on the foundation concrete,
A step of inking the ink of the pillar base on the surface of the base mortar,
A step of placing the anchor bolt insertion hole and applying a template of the pillar base ink on the pillar base, aligning the pillar ink on the pillar ink, and placing the template on the base mortar;
2. The method according to claim 1, further comprising a step of removing the template after selecting and setting at least two of the column base position adjusting collars that fit in a gap between the insertion hole and the anchor bolt. The construction method according to claim 3.   The column base position adjustment for a construction method according to any one of claims 1 to 4, wherein the center of the inner periphery and the outer periphery of a cross section perpendicular to the height direction is the same cylindrical shape. Color.   The column base position adjusting collar for a construction method according to any one of claims 1 to 4, characterized in that it has a cylindrical shape in which an inner periphery and an outer periphery of a cross section perpendicular to the height direction are eccentric.   The column base position adjusting collar for a construction method according to claim 5 or 6, wherein a female screw penetrating between the inner periphery and the outer periphery is provided at least at one place.   The column base position adjusting collar for a construction method according to any one of claims 5 to 7, further comprising a locking portion for upward extraction at least at a part of the outer periphery.

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