JP5013565B2 - Anchor bolt anchoring method for column base using sheath tube - Google Patents

Description

The present invention relates to a column base anchor bolt fixing method for fixing a plurality of column base anchor bolts at predetermined positions.

When fixing a plurality of anchor bolts for column bases, discard the plurality of anchor bolts via a supporting frame, etc., and place the concrete on a ground such as concrete, so that the plurality of anchor bolts are fixed. At the same time, the technical means for fixing at a predetermined position has been widely adopted (see Patent Document 1). By the way, the column base anchor bolts are often heavy. In particular, when a plurality of anchor bolts are fixed together, the total weight increases. Therefore, in the case of the conventional fixing device, a plurality of anchor bolts are accurately supported at a predetermined position, so that the supporting frame itself is required to have a strong strength corresponding to that, and the weight of the supporting frame itself is increased. . Moreover, it is not uncommon for the foundation height from the abandoned concrete to the top of the foundation column type concrete to be 3 to 5 m, and the center of gravity as the anchor fixing device also becomes high, so that it is reinforced with braces depending on the case, etc. There are also problems that it takes time to ensure stability, and that the dimensional error in the upper part due to vibration tends to increase. In addition, the outer shape of the entire support frame is increased, which not only increases the work load on the installation, but also increases the cost.
JP-A-4-339913

In addition, the concrete is placed in the mold, and the concrete tube is pressed into the upper part of the mold via the jig while the concrete is uncured and the upper part is supported by the jig. A technical means is known that waits for solidification, and after solidification, an anchor bolt is inserted into the sheath tube and a grout material is injected and fixed (see Patent Document 2). In addition, a sheath tube composed of an inner cylinder and an outer cylinder, which are screwed so as to be adjustable in height by means of a spiral groove, is fixed to a box as a mold through a support rail, and an anchor bolt for machine installation is installed in the sheath pipe There is also known a technical means for inserting and solidifying and installing (Patent Document 3). However, in these prior arts, since the technical means of fixing the sheath tube to the mold was employed, there was a problem that the position accuracy of the sheath tube depended on the installation accuracy of the mold. In particular, in the latter case, there is a possibility that the support rail interferes with the reinforcement of the column base part, not for the column base. Further, as an anchor box for installing a mechanical device, there is also known a technical means in which a cylindrical anchor box is installed on abandoned concrete via a support leg so that the height can be adjusted (see Patent Document 4). However, this prior art is also a technical means for installing a mechanical device, and fixing of anchor bolts for a column base is not assumed. For fixing of a plurality of anchor bolts required for a column base, There was no ingenuity.
Japanese Patent Publication No. 7-103577 Japanese Utility Model Publication No. 57-60563 Japanese Utility Model Publication No. 61-108752

In view of the prior art situations as described above, a plurality of anchor bolts can be accurately fixed, as well as providing an anchor bolt fixing method for self-sustainable pedestal, the weight of the equipment The purpose is to reduce the work load in the installation work and to reduce the position error of the upper part due to shake by improving the stability by lowering the center of gravity as the fixing device.

In the present invention, in order to solve the above-described problem, an installation unit fixed to the ground side, a plurality of sheath tubes installed in a state of being self-supported at a predetermined position only by the installation unit, and an upper interval between the sheath tubes a first template for holding a plurality of anchor bolts to be inserted into the sheath tube, using a second template for holding the top spacing between the anchor bolt cross the plurality of the upper interval between each sheath tube cross In a state where the plurality of sheath tubes are held by the first template and are installed in a predetermined position on the ground side in a state where the plurality of sheath tubes are self-supported only through the installation means, After the hardening material is solidified, anchor bolts are inserted into the sheath tubes, and the upper interval between the anchor bolts is determined by the second template. In lifting condition and a plurality of anchor bolts adopted technical means that fixing by hardening material. Note that the method of supporting the sheath tube by the installation means may be a fixed type or a structure that can be adjusted in height.

According to the present invention, the following effects can be obtained.
(1) Since the plurality of sheath tubes are installed in a self-supporting state only through installation means fixed to the ground side, and do not depend on other members such as a mold, members other than the installation means are used. Therefore, it is possible to provide a fixing method for anchor bolts for column bases, which is not affected by the above-described effects and has high positional accuracy.
(2) Since the hardened material is placed in the periphery in a state where it is self-supported using a lightweight sheath tube and the anchor bolt is inserted and set after solidifying, the position of the center of gravity as the fixing device is It is relatively long and heavy, and can be significantly lowered compared to an anchor bolt fixing device that incorporates a plurality of column base anchor bolts at the same time. The problem of position error due to deflection derived from the position of the center of gravity and the problem of reinforcement due to braces or the like can be almost solved.
(3) A plurality of anchor bolts can be accurately fixed at intended positions without interfering with the complicated bar arrangement state of the column base.
(4) Since the first template that holds the upper space between the sheath tubes and the second template that holds the upper space between the anchor bolts are used, the positional relationship of the anchor bolt with respect to the sheath tube is accurately determined. Since a hardened layer having a uniform thickness made of a hardened material such as a grout material can be secured around each anchor bolt, a plurality of anchor bolts can be fixed accurately.
(5) Since the installation space for the plurality of anchor bolts is secured using a lightweight sheath tube, the weight of the entire apparatus is large and the conventional column base anchor bolts that are inconvenient to handle are used. The fixing device can be significantly reduced in weight.

The present invention can be widely applied as a fixing method for anchor bolts for column bases of buildings. It can be applied not only to steel structures, reinforced concrete structures, and steel reinforced concrete structures, but also to anchoring methods for anchor bolts for wooden column bases. As the installation means fixed to the ground side, any means may be used as long as it can be installed in a state where a plurality of sheath tubes are self-supporting at a predetermined position, and a combination of angle members as described later is used. In this case, if the height of the sheath tube can be adjusted, the adaptability increases, but a fixed type that cannot be adjusted in height may be used. The sheath tube is formed in a thin cylindrical shape from a metal or an appropriate synthetic resin. If the cylindrical portion is formed on a spiral or wavy uneven surface, it is effective for integration of the hardener inside and outside the sheath tube, but a simple planar shape is also possible. It should be noted that the number of sheath tubes installed may be the same as or more than the number of anchor bolts installed, and there may be some vacancy depending on the case. The first template that holds the upper space between the sheath tubes may be any template that can accurately hold the relative positional relationship between the upper portions of the respective sheath tubes, and does not support heavy objects. Therefore, it can be configured from a flat plate having a small thickness. On the other hand, the correspondence of the second template that holds the upper space between the anchor bolts differs depending on the case. That is, when the anchor bolt is inserted into each sheath tube after the hardened material such as concrete cast around the sheath tube is solidified, the weight of the anchor bolt is supported in the second template in the state where each anchor tube is supported. The insertion form and each anchor bolt are inserted into each sheath tube in advance, the weight is supported by the sheath tube side, and only the relative positional relationship between the upper portions of each anchor bolt is held by the second template. The form to do is possible. Therefore, the strength required for the second template varies greatly depending on whether or not the second template supports the weight of the anchor bolt according to these forms.

  Regarding the work procedure after the hardened material such as concrete placed around the sheath tube is solidified, various work modes are possible as follows. (1) Insert the anchor bolts into the respective sheath tubes while being supported by the second template, and then inject a hardening material such as a grout material into the gap between the sheath tube and the anchor bolts to solidify. (2) A curing material is injected into each sheath tube, and the anchor bolt is inserted into each sheath tube while being supported by the second template while the curing material is not solidified. (3) Each anchor bolt is inserted into each sheath tube, and then the upper portion of each anchor bolt is supported by the second template, and then a hardening material is injected into the gap between each sheath tube and the anchor bolt to solidify. Let (4) Insert each anchor bolt into each sheath tube, and then inject a hardening material into the gap between each sheath tube and the anchor bolt. While the hardening material does not solidify, Supported by a second template. (5) A hardening material is injected into each sheath tube, and while the hardening material does not solidify, each anchor bolt is inserted into each sheath tube, and the upper portion of each anchor bolt is supported by the second template. (6) The second template is fixed at a predetermined position on the upper surface of the foundation concrete, and a hardening material is injected into each sheath tube. While the hardening material does not solidify, each anchor bolt is passed through the insertion hole of the second template. Insert into sheath tube. (7) While the hardener is injected into each sheath tube and the hardener does not solidify, the second template is fixed at a predetermined position on the upper surface of the foundation concrete, and then each anchor bolt is inserted into the second template. Insert into each sheath tube through the hole. And in any of the above work procedures, by using the first and second templates, it is possible to secure a hardened layer having a uniform thickness made of a hardened material such as a grout material around each anchor bolt, A plurality of anchor bolts can be fixed accurately at the same time.

  1 to 8 show a first embodiment of the present invention, in which FIG. 1 is a front view, FIG. 2 is a plan view, FIG. 3 is a sectional view taken along the line AA in FIG. 5 is a partially enlarged view showing a fixing portion of the first template, FIG. 6 is a partially enlarged view showing a modified example related to the fixing portion of the first template, and FIG. 7 is a state immediately before insertion of the anchor bolt into the sheath tube. FIG. 8 is a state explanatory diagram showing the anchor bolt fixing completion state. In this embodiment, the case where four anchor bolts for column bases are installed is shown. In the figure, reference numeral 1 denotes a sheath tube. In this embodiment, four sheath tubes are provided in accordance with the number of anchor bolts installed. Below each sheath pipe | tube 1, it is comprised so that height adjustment is possible by the installation means 3 fixed to the ground side, such as the discarded concrete 2. As shown in FIG. As shown in FIG. 3, the installation means 3 uses four angle members 4 to be disposed and fixed at predetermined positions on the concrete 2 so that a square is formed inside, and each corner of the square The angle member 5 is erected and fixed by welding or bolts and nuts, and as shown in FIG. 1, a short support cylinder in which the lower part of the sheath tube 1 can be fitted to the upper end portion of the angle member 5 It is configured by fixing the body 6. The support cylinder 6 may be made of the same material as that of the sheath tube 1 or may be made of a thin metal plate and welded to the upper end portion of the angle member 5 to be fixed. In the present embodiment, spiral ridges 7 having the same pitch are formed on the inner peripheral surface of the sheath tube 1 and the outer peripheral surface of the support cylinder 6, and the lower part of the sheath tube 1 is fitted to the support cylinder 6. When they are combined, they are configured so as to be screwed together via the ridges 7. Therefore, it is also possible to adjust the height of the sheath tube 1 through the amount of screwing of the sheath tube 1 as necessary.

  FIG. 4 shows the procedure of the installation work of the present embodiment. As described above, while rotating each sheath tube 1, it is screwed into the support cylinder 6 constituting the installation means 3 and supported at a predetermined height. In that case, the first template 8 is then fixed to the upper part of each sheath tube 1 to maintain the relative positional relationship between the sheath tubes 1. In this case, in this embodiment, as the means for fixing the first template 8 to the upper part of each sheath tube 1, as shown in FIG. 5, the large diameter of the fixing and combined cap 9 formed of a soft material such as rubber or polyethylene. A method is adopted in which the portion 10 is inserted into the insertion hole formed in the first template 8 and the small diameter portion 11 is fixed by being press-fitted inside the upper end portion of the sheath tube 1. As shown in FIG. 6, a fixing / cap 13 having a small hole 12 formed in the center of the upper surface formed of a soft material is press-fitted into the upper end of the sheath tube 1, and the second cap 13 is placed on the fixing / cap 13 A modification in which the first template 8 is placed and the lower protrusion of the locking member 14 is press-fitted into the small hole 12 through a small hole formed in the first template 8 is also possible.

  Therefore, when the sheath tube 1 is disposed at a predetermined position on the concrete 2 through the installation means 3 by the above procedure, the foundation concrete is placed around each sheath tube 1 at an appropriate time. It will be. FIG. 7 shows a state immediately before the four anchor bolts 16 are inserted into the sheath tube 1 after the foundation concrete 15 is solidified. As shown in the figure, in this embodiment, the upper part of each anchor bolt 16 is inserted into an insertion hole formed in the second template 17, and nuts 19, 20 are screwed into the upper male screw part 18 from above and below to be tightened. By fixing, the method of mounting | wearing the 2nd template 17 in the state which maintained the upper space | interval between each anchor bolt 16 was employ | adopted. As shown in the figure, with the anchoring cap 9 at the upper end of each sheath tube 1 removed, each anchor bolt 16 is inserted into each sheath tube 1 as shown in FIG. The fixing of the plurality of anchor bolts is completed by injecting a hardening material such as a grout material into the gap between the anchor bolts 16 and solidifying it.

  9 and 10 show a second embodiment of the present invention. As shown in FIG. 9, in this embodiment, the installation means 22 is configured by arranging and fixing four angle members 21 at predetermined positions on the discarded concrete 2 in the same manner as in the first embodiment. In addition, angle portions 24 integrally fixed or formed at the lower part of each sheath tube 23 are fixed to the square corners formed therein by bolts, nuts, welding, etc., respectively, and further shown in FIG. As shown, the first template 25 is installed at the upper end of each sheath tube 23, and the upper space between the sheath tubes 23 is maintained. In this embodiment, the case where the fixing / cap 13 is used as the fixing means for the first template 25 is shown.

  11 and 12 show a third embodiment of the present invention. This embodiment is a modification of the second embodiment, and as shown in the figure, the first template 26 is formed in a rectangular shape with each corner being obliquely cut and fixed at a predetermined position on the discarded concrete 2. This is characterized in that the sheath tubes 31 and 32 suspended from the first template 26 are disposed between the sheath tube 29 and the sheath tube 30 standing on the installation means 28 made of the angle member 27. . In the figure, 33 is an opening formed in the first template 26.

  FIG. 13 shows a fourth embodiment of the present invention. In this embodiment, four angle members 34 are arranged and fixed at predetermined positions on the discarded concrete 2 in the same manner as in the first embodiment, and pillars 35 are respectively attached to square corners formed inside the angle members 34. The installation means 38 is configured by standing and providing a support portion 37 that supports the sheath tube 36 so that the height of the sheath tube 36 can be adjusted. As shown in the figure, the first template 39 is installed at the upper end of each sheath tube 36 supported by the support portions 37, and the upper space between the sheath tubes 36 is maintained.

  FIGS. 14 to 17 show a fifth embodiment of the present invention. FIG. 14 is a front view before assembly, FIG. 15 is a plan view thereof, FIG. 16 is a front view after assembly, and FIG. FIG. As shown in the figure, in this embodiment, four angle members 40 are arranged and fixed at predetermined positions on the discarded concrete 2 in the same manner as in the first embodiment, and the corners of the quadrilateral formed therein are arranged. The installation means 44 is configured by providing the support cylinders 43 on which the sheath pipes 42 can be screwed at the upper portions of the support columns 41. When assembling, as shown in FIG. 14, while rotating each sheath tube 42, the lower part is screwed to the support cylinder 43 and adjusted to a predetermined height, and the upper end portion of each sheath tube 42 is adjusted. The first template 45 is installed to maintain the upper space between the sheath tubes 42. Furthermore, as shown in FIG. 16, by suspending a sheath tube 46 between the sheath tubes 42 according to circumstances, the case of eight anchor bolts can be dealt with.

  18 and 19 show a sixth embodiment of the present invention. FIG. 18 is a front view after assembly, and FIG. 19 is a plan view thereof. This embodiment is a modification of the fifth embodiment, and a column 48 erected at a corner of a quadrangle formed inside an angle member 47 arranged and fixed at a predetermined position on the discarded concrete 2 as shown. Are provided with support cylinders 50 and 51 to which the sheath tube 49 can be screwed, and the installation means 52 is configured. As shown in FIG. This shows a case where the sheath tube 49 is provided.

Thus, after each sheath tube is installed in a predetermined positional relationship with respect to the ground side of the discarded concrete 2 or the like as described above, a hardening material such as concrete is placed around the sheath tube and solidified. Further, when the anchor bolt is inserted into each sheath tube, and a hardening material such as a grout material injected into the gap portion before or after the insertion is solidified, and a plurality of anchor bolts are fixed at a predetermined position, Pillars will be erected using these anchor bolts. 20 and 21 are partial front views showing how the anchor bolt is used. FIG. 20 shows a case where it is used for standing a steel column. Each anchor bolt 55 protruding on the foundation concrete 54 is inserted into an insertion hole formed in a base plate 57 of the steel column 56 and fixed by a nut 58. The base plate 57 can be erected by filling a grout material or the like below. In the figure, 59 is a mortar for level adjustment. Incidentally, the anchor bolt fixing method for a column base according to the present invention can be similarly applied to a column base part of a wooden building. Furthermore, as shown in FIG. 21, it is also possible to simultaneously fix the portion of the wooden pillar 63 and the base 64 using two anchor bolts 61 and 62 protruding on the foundation concrete 60 and having different lengths.

It is the front view which showed 1st Example of this invention. It is a top view of the Example. It is AA sectional drawing of FIG. It is an exploded view of the same embodiment. It is the elements on larger scale which showed the fixing | fixed part of the 1st template in the Example. It is the elements on larger scale which showed the modification regarding the fixing | fixed part of a 1st template. It is state explanatory drawing which showed the state just before insertion to the sheath pipe | tube of an anchor bolt. It is a state explanatory view showing a fixing completion state of the anchor bolt. It is the front view which showed the state before the assembly of 2nd Example of this invention. It is the front view which showed the state after the assembly of the Example. It is the front view which showed 3rd Example of this invention. It is a top view of the Example. It is the front view which showed 4th Example of this invention. It is the front view before the assembly which showed 5th Example of this invention. It is a top view of FIG. It is a front view after the assembly of the Example. FIG. 17 is a plan view of FIG. 16. It is the front view after the assembly which showed the 6th example of the present invention. It is a top view of the Example. It is the partial front view which showed the usage form of the anchor bolt. It is the partial front view which showed the other usage pattern of the anchor bolt.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Sheath pipe | tube, 2 ... Discard concrete, 3 ... Installation means, 4, 5 ... Angle material, 6 ... Supporting cylinder, 7 ... Projection strip part, 8 ... 1st template, 9 ... Adhesive combined cap, 10 ... Large diameter 11, small diameter portion, 12, small hole, 13, fixing / cap, 14, locking member, 15, foundation concrete, 16, anchor bolt, 17, second template, 18, male screw portion, 19, 20, nut, 21 ... Angle material, 22 ... Installation means, 23 ... Sheath tube, 24 ... Angle part, 25 ... First template, 26 ... First template, 27 ... Angle material, 28 ... Installation device, 29-32 ... Sheath tube, 33 ... Opening part, 34 ... Angle member, 35 ... Stand, 36 ... Sheath tube, 37 ... Supporting part, 38 ... Installation means, 39 ... First template, 40 ... Angle member, 41 ... Stand, 42 ... Sheath tube, DESCRIPTION OF SYMBOLS 3 ... Support cylinder, 44 ... Installation means, 45 ... 1st template, 46 ... Sheath tube, 47 ... Angle material, 48 ... Strut, 49 ... Sheath tube, 50, 51 ... Support cylinder, 52 ... Installation means, 53 ... 1st template, 54 ... Foundation concrete, 55 ... Anchor bolt, 56 ... Steel column, 57 ... Base plate, 58 ... Nut, 59 ... Mortar for level adjustment, 60 ... Foundation concrete, 61, 62 ... Anchor bolt, 63 ... Wooden Pillar, 64 ... foundation

Claims (2)

An installation means fixed to the ground side, a plurality of sheath tubes installed in a state of being self-supported at a predetermined position only by the installation means, a first template for maintaining an upper interval between the sheath tubes, and the sheath tube a plurality of anchor bolts to be inserted into, using a second template for holding the top spacing between the anchor bolt cross the plurality of, holding the upper interval between the sheath tubes each other by the first template, and their In a state where a plurality of sheath tubes are installed in a predetermined position on the ground side in a state where they are self-supported only through the installation means, a hardening material is placed around the sheath tube, and after the hardening material is solidified, In the state where the anchor bolts are inserted into the upper part and the upper space between the anchor bolts is held by the second template, a plurality of anchors Column base anchor bolt fixing method using a sheath tube, characterized in a Turkey be fixed by the belt hardener. Column base anchor bolt fixing method using a sheath tube of claim 1 which is adapted to support the sheath tube height adjustable by said mounting means.

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