JP2008255724A - Jig for execution of work of foundation structure with anchor bolt - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simply adjust places of set heights of an anchor bolt and a reinforcing plate, and to finely adjust the height of the reinforcing plate when concrete is placed in a foundation structure with the anchor bolt. <P>SOLUTION: A jig 50 for the execution of works of the foundation structure with the anchor bolt has anchor plates 60 and screws 80 for adjusting the reinforcing plates mounted to the anchor plates 60. The anchor plates 60 are held to upper sections of opposite forms 30, and hold the upper end of the anchor bolt 25. The screws 80 for adjusting the reinforcing plates are made to abut against the reinforcing plates 26, and the height places of the reinforcing plates 26 to the anchor plates 60 are adjusted. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a construction jig for a foundation structure with anchor bolts.

  Conventionally, in a foundation structure of a building such as a house, a lower portion of an anchor bolt is embedded and fixed to an upper end portion of a concrete foundation, and the anchor bolt protrudes from the upper surface of the concrete foundation.

In Patent Document 1, the anchor plate is held at the upper part between the opposing molds, and the concrete is poured between the molds in a state where the reinforcing plate is fixed to the anchor bolts held in the middle part of the anchor plate. There is disclosed a technique in which the reinforcing plate is embedded and fixed to an upper end portion of a concrete foundation. According to this, even if a horizontal external force acts on the anchor bolt, this external force is not input directly from the anchor bolt portion to the concrete foundation but is distributed and input via the reinforcing plate. It is possible to prevent the corner portion corresponding to the anchor bolt of the foundation from being destroyed.
JP2002-88775

The foundation structure with anchor bolts of Patent Document 1 has the following disadvantages.
(1) There is no means for adjusting the height position of the anchor plate relative to the formwork, and as a result, the set height position of the anchor bolt and the reinforcing plate embedded and fixed to the foundation cannot be easily adjusted.

  (2) When placing concrete, there is no means to resist the reinforcement plate fixed to the anchor bolts from being lifted by the pressure of ready-mixed concrete, preventing the reinforcement plate from tilting between opposing molds, Adjustment is not possible.

  SUMMARY OF THE INVENTION An object of the present invention is to make it possible to easily adjust the set height position of an anchor bolt and a reinforcing plate in a foundation structure with an anchor bolt, and to make the height of a reinforcing plate finely adjustable when placing concrete.

  The invention of claim 1 is a construction jig for a foundation structure with an anchor bolt formed by embedding and fixing a reinforcing plate provided in an intermediate portion of an anchor bolt in an upper portion of a concrete foundation, and includes an anchor plate and the anchor plate. A reinforcing plate adjusting screw provided, the anchor plate is held at the upper part of the opposite formwork, holds the upper end of the anchor bolt, and the reinforcing plate adjusting screw abuts the reinforcing plate, The height position of the reinforcing plate is adjusted.

  The invention of claim 2 further comprises a first horizontal piece in which the anchor plate is held on the upper part of the mold, and a second horizontal piece having a reinforcing plate adjusting screw. A second horizontal piece is provided at the lower end of the downward bent portion bent downward from the first horizontal piece.

  The invention of claim 3 further includes a first horizontal piece in which the anchor plate is held on the upper part of the mold, and a second horizontal piece having a reinforcing plate adjusting screw. A second horizontal piece is provided at the upper end of the upward bent portion bent upward from the first horizontal piece.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the anchor plate further includes an anchor bolt holding portion at each of a plurality of positions along the longitudinal direction of the mold, and for each anchor bolt holding portion. A reinforcing plate adjusting screw is provided as an accessory.

(Claim 1)
(a) The reinforcing plate adjusting screw provided on the anchor plate abuts on the reinforcing plate to adjust the height position of the reinforcing plate with respect to the anchor plate. Therefore, the reinforcing plate adjustment screw prevents the reinforcing plate fixed to the anchor bolts from being lifted by the pressure of ready-mixed concrete during concrete placement, and prevents the reinforcing plate from tilting between the opposing molds. Height can be adjusted.

(Claim 2)
(b) The first horizontal piece on which the anchor plate is held on the upper part of the formwork and the second horizontal piece having the reinforcing plate adjusting screw, and the downward bending that is bent downward from the first horizontal piece. The 2nd horizontal piece was provided in the lower end of the part. Therefore, when the first horizontal piece of the anchor plate is arranged on the upper part of the mold, the second horizontal piece is arranged on the side closer to the inside and lower side of the mold, and this anchor plate is placed on a large mold having a high overall height. It can be suitably applied to a frame.

(Claim 3)
(c) The first horizontal piece in which the anchor plate is held on the upper part of the mold, and the second horizontal piece having a reinforcing plate adjusting screw, and the upper plate is bent upward from the first horizontal piece. The 2nd horizontal piece was provided in the upper end of the part. Therefore, when the first horizontal piece of the anchor plate is arranged on the upper part of the formwork, the second horizontal piece is arranged above the formwork, and this anchor plate is suitable for a small formwork having a low overall height. Applicable.

(Claim 4)
(d) The anchor plate is provided with an anchor bolt holding portion at each of a plurality of positions along the longitudinal direction of the mold, and a reinforcing plate adjusting screw is attached to each anchor bolt holding portion. Therefore, when anchor bolts are embedded and fixed at a plurality of positions adjacent to the foundation, the anchor bolts and the reinforcement plates can be handled by a single anchor plate, and the number of anchor plates used can be reduced and the number of reinforcement steps can be reduced.

  1 is a sectional view showing a foundation structure with anchor bolts, FIG. 2 is a schematic perspective view showing a foundation structure with anchor bolts, FIG. 3 is a sectional view showing an example in which a building structure is installed on the foundation structure with anchor bolts, and FIG. Is a plan view showing the construction jig, FIG. 5 is an end view showing the construction jig, FIG. 6 is an end view showing the construction jig, and FIG. 7 is a position where the construction jig is used in the unit building. Schematic diagram, Fig. 8 is a schematic diagram showing the position where the construction jig is used in the unit building, Fig. 9 is a cross-sectional view showing a state where the construction jig is set on the formwork, and Fig. 10 shows the pouring state of the ready-mixed concrete. FIG. 11 is an end view showing the construction jig, and FIG. 12 is a sectional view showing the construction jig set on the mold.

  In FIG. 1, a foundation groove 21 that extends along a building is formed on the ground 20, and a split chestnut layer 22 is formed by adding the chestnut to the bottom of the foundation groove 21. A footing layer 23 formed by hitting concrete is formed on the split chestnut layer 22, and a concrete foundation 24 is formed on the footing layer 23. A lower portion of the anchor bolt 25 is embedded and fixed at the upper end portion of the concrete foundation 24, and the upper end portion of the anchor bolt 25 is protruded from the upper surface of the concrete foundation 24. 1 and 2, the anchor bolt 25 is arranged so as to be shifted from the center of the width direction of the concrete foundation 24 to the right side. Therefore, when the right corner 24a acts on the anchor bolt 25 from the direction of the arrow B, When an external force is directly input from the anchor bolt 25 to the concrete foundation 24, the corner portion 24a tends to be easily broken by the external force received from the anchor bolt 25.

  However, as shown in FIGS. 1 and 2, a reinforcing plate 26 is embedded and fixed to the upper end portion of the concrete foundation 24 in correspondence with the anchor bolt 25. At this time, the reinforcing plate 26 is loosely inserted into the anchor bolt 25, and upper and lower nuts 27 a and 27 b are screwed, and the lower nut 27 b is embedded in the concrete foundation 24 on the lower surface side of the reinforcing plate 26.

  The reinforcing plate 26 has a horizontal plate portion 26a embedded in the upper portion of the concrete foundation 24, and side plate portions 26b and 26c protruding downward at each of the left end and the right end of the horizontal plate portion 26a. The side plate part 26c is not essential. The side plate portion 26 b is embedded and engaged with the side portion of the upper end portion of the concrete foundation 24 on the side surface opposite to the direction in which the external force indicated by the arrow B acts on the anchor bolt. The upper surface of the horizontal plate portion 26 a is formed flush with the upper surface of the concrete foundation 24, and the outer surfaces of the side plate portions 26 b and 26 c are formed flush with the side surface of the concrete foundation 24. A metal plate can be used for the reinforcing plate 26. In this case, a material that does not chemically react with components contained in concrete or the like is used. The reinforcing plate 26 may be made of a synthetic resin material other than metal or other materials. In short, the external force acting on the anchor bolt B is directly input from the anchor bolt 24 to the concrete foundation 24 and does not act locally, and this external force is dispersed and input to the concrete foundation 24 to cause partial damage. If it can prevent.

  The horizontal plate portion 26a has a bolt insertion hole 28 and a confirmation hole 29 into which the anchor bolt 25 is loosely inserted.

  In such a structure, when a horizontal external force acts on the anchor bolt 25 from the direction of the arrow B, the external force is not input directly from the anchor bolt 25 portion to the concrete foundation 24 but is distributed and input via the reinforcing plate 26. Will be. At this time, the external force acting on the anchor bolt 25 is input to the concrete foundation 25 via the side plate portion 26b on the side opposite to the direction in which the external force acts. As a result, even if a large external force is input to the anchor bolt 25 from the direction of the arrow B, it is avoided that the corner portion 24a corresponding to the anchor bolt 25 of the concrete foundation 24 is broken by this input. Thus, it is possible to prevent the corner portion 24a corresponding to the anchor bolt 25 of the concrete foundation 24 from being broken.

  The floor beam 1 of the building structure installed on the upper surface of the concrete foundation 24 is inserted into an anchor bolt 25 protruding from the upper surface of the concrete foundation 24 and screwed to the anchor bolt 25 as shown in FIG. Fastened to the concrete foundation 24 by the nut 27A.

  However, it is possible to easily adjust the set height position of the anchor bolt 25 and the reinforcing plate 26 embedded and fixed in the foundation 24 between the left and right opposite molds 30 and 30, and the reinforcing plate 26 is delicately set when placing concrete. The construction jig 50 for enabling height adjustment will be described.

  As shown in FIGS. 4 to 6, the construction jig 50 includes an anchor plate 60, a mold adjusting screw 70 and a reinforcing plate adjusting screw 80 provided on the anchor plate 60.

  The anchor plate 60 is held on top of the left and right molds 30, 30 and holds the upper end of the anchor bolt 25. The upper end portion of the anchor bolt 25 to which the anchor bolt 25 is attached is loosely inserted into a second horizontal piece 62 described later of the anchor plate 60, and the anchor plate 60 is sandwiched between two nuts 64a and 64b that are screwed to the anchor bolt 25. The anchor bolt 25 is held on the anchor plate 60. The anchor plate 60 is made of, for example, a metal plate bending molded body or a resin molded body, and is used to adjust the reinforcing plate between the left and right first horizontal pieces 61 provided with the mold adjusting screws 70 and the left and right first horizontal pieces 61. The second horizontal piece 62 is provided at the lower end of a downward bent portion 63 that is bent downward from the first horizontal piece 61. The second horizontal piece 62 of the anchor plate 60 includes a bolt insertion hole 64 for the anchor bolt 25 (two bolt insertion holes 64 of a large diameter bolt hole and a small diameter bolt hole).

  The mold adjusting screw 70 is composed of a thumbscrew screwed to the first horizontal piece 61 on the left and right of the anchor plate 60, and the screw tip abuts on the upper surface of the flange 31 of the mold 30, thereby anchoring the mold 30. The height position of the plate 60 is adjusted. Reference numeral 71 denotes a lock nut. The anchor plate 60 whose height position has been adjusted is fixed by a squat 90 that fastens the first horizontal piece 61 to the flange 31 of the mold 30.

  The reinforcing plate adjusting screw 80 is composed of a butterfly screw screwed to the second horizontal piece 62 at the center of the anchor plate 60, and the tip of the screw abuts on the left and right upper surfaces sandwiching the bolt insertion hole 64 of the reinforcing plate 26, The height position of the reinforcing plate 26 with respect to the anchor plate 60 is adjusted.

  Here, the construction jig 50 includes a single anchor plate 60 </ b> A (FIG. 4) and a double anchor plate 60 </ b> B (FIG. 5) as the anchor plate 60.

  As shown in FIG. 4, the single anchor plate 60A has bolt insertion holes 64 for anchor bolts 25 (two holes, a large diameter bolt hole and a small diameter bolt hole) at a single position along the longitudinal direction of the foundation 30. Bolt insertion holes 64) are provided in the second horizontal piece 62, two formwork adjusting screws 70 are screwed into the left and right first horizontal pieces 61, and two left and right reinforcing plates are attached to the second horizontal piece 62. The adjusting screw 80 is screwed.

  As shown in FIG. 5, the double anchor plate 60 </ b> B is long along the longitudinal direction of the foundation 30, and is separated from each other at two positions at both ends between the left and right long first horizontal pieces 61. Two horizontal pieces 62 are provided. Each of the two second horizontal pieces 62 is provided with a bolt insertion hole 64 for the anchor bolt 25 (two bolt insertion holes 64 of a large diameter bolt hole and a small diameter bolt hole). Formwork adjustment screws 70 are screwed to both ends of the horizontal piece 61, and two reinforcing plate adjustment screws 80 are attached to each second horizontal piece 62.

  In the foundation on which each building unit 101 of the unit building 100 shown in FIGS. 7 and 8 is installed, one anchor bolt 25 is attached to a portion corresponding to a corner portion located on the outer wall of the building 100 in the longitudinal direction of the building unit 101. When installing, for adjacent anchor bolts 25 for adjacent building units 101, two single anchor plates 60A are used next to each other (FIG. 7), or only one double anchor. Plate 60B is used (FIG. 8). In the building 100 composed of seven building units 101, FIG. 7 uses 16 single anchor plates 60A, and FIG. 8 uses six single anchor plates 60A and five double anchor plates 60B. To become.

Hereinafter, the construction procedure of the concrete foundation 24 will be described.
(1) As shown in FIG. 9, a foundation groove 21 is formed on the ground 20 along the building, and the split chestnut layer 22 is formed by throwing the split chestnut into the bottom of the foundation groove 21 to form the split chestnut layer 22. A footing layer 23 in which concrete is struck is formed. Next, the molds 30 and 30 are arranged on the footing layer 23 so as to face each other and spaced apart from each other, and the molds 30 and 30 are supported on the ground 20 by a support member (not shown).

  (2) The left and right first horizontal pieces 61 of the anchor plate 60 of the construction jig 50 are connected to the flange 31 of the mold 30 via the mold adjusting screws 70 screwed to the first horizontal piece 61. Place on top. After the height position of the anchor plate 60 with respect to the mold 30 is adjusted by the mold adjusting screw 70, the first horizontal piece 61 of the anchor plate 60 is fastened to the flange 31 of the mold 30 by the scissors 90.

  (3) The bolt insertion hole 28 of the reinforcing plate 26 is loosely inserted in the middle part of the anchor bolt 25, and the reinforcing plate 26 is sandwiched between the upper and lower nuts 27a and 27b screwed to the anchor bolt 25. To attach. The neck length of the anchor bolt 25 with respect to the reinforcing plate 26 is set to a certain length.

  (4) The upper end portion of the anchor bolt 25 to which the reinforcing plate 26 is attached is loosely inserted into the second horizontal piece 62 of the anchor plate 60, and the anchor plate 60 is screwed to the anchor bolt 60 by two nuts 64a and 64b. The anchor bolt 25 is held by the second horizontal piece 62 of the anchor plate 60 with the second horizontal piece 62 interposed therebetween. The hook 25a of the anchor bolt 25 is set at a substantially central portion of the interval between the opposing molds 30 and 30 so that the hook 25a of the anchor bolt 25 can be set at the central portion of the thickness which is a predetermined position inside the concrete foundation 24.

  (5) Adjust the upper and lower levels of the reinforcing plate 26 as necessary. By loosening the upper and lower nuts 27a, 27b screwed to the anchor bolt 25, the reinforcing plate 26 is translated along the inner side surface of the mold 30 within the distance L between the upper and lower nuts 27a, 27b. The level can be adjusted. At this time, the height level and level of the reinforcing plate 26 with respect to the anchor plate 60 are adjusted by the reinforcing plate adjusting screw 80 screwed to the second horizontal piece 62 of the anchor plate 60.

  (6) Pour the ready-mixed concrete 33 between the molds 30 and 30 as shown in FIG. At this time, the ready-mixed concrete 33 is poured until the lower part of the anchor bolt 25 is immersed, and the ready-mixed concrete 33 is filled up to the reinforcing plate 26. Moreover, at this time, it is confirmed that the ready-mixed concrete 33 has started to overflow upward from the concrete confirmation hole 29, and the pouring of ready-mixed concrete is stopped at this position. By doing in this way, the pouring height of the ready-mixed concrete 33 can be easily confirmed using the reinforcing plate 26 as a guide. The lower nut 27 b is embedded in the ready-mixed concrete on the lower surface side of the reinforcing plate 26. At this time, the height level and level of the reinforcing plate 26 relative to the anchor plate 60 can be readjusted by the reinforcing plate adjusting screw 80 screwed to the second horizontal piece 62 of the anchor plate 60.

  (7) After the ready-mixed concrete 33 is hardened, the foundation 30 in which the anchor bolts 25 and the reinforcing plate 26 are attached to the concrete foundation 24 by embedding around the concrete foundation 24 formed by removing the molds 30, 30. The construction is completed, and the basic structure as shown in FIG. 1 is obtained.

According to the present embodiment, the following operational effects can be obtained.
(a) The mold adjusting screw 70 provided on the anchor plate 60 abuts on the mold 30 to adjust the height position of the anchor plate 60 with respect to the mold 30. Therefore, the set height position of the anchor bolt 25 and the reinforcing plate 26 held by the anchor plate 60 can be easily adjusted.

  (b) The reinforcing plate adjusting screw 80 provided on the anchor plate 60 abuts on the reinforcing plate 26 to adjust the height position of the reinforcing plate 26 with respect to the anchor plate 60. Therefore, the reinforcing plate adjusting screw 80 counteracts that the reinforcing plate 26 fixed to the anchor bolt 25 is lifted by the pressure of the ready-mixed concrete 33 when the concrete is placed, and the reinforcing plate 26 is inclined between the facing molds 30. Can be prevented or delicate height adjustment.

  (c) The anchor plate 60 has a first horizontal piece 61 provided with a mold adjusting screw 70 and a second horizontal piece 62 provided with a reinforcing plate adjusting screw 80, and is below the first horizontal piece 61. A second horizontal piece 62 was provided at the lower end of the bent downward bent portion 63. Accordingly, when the first horizontal piece 61 of the anchor plate 60 is arranged on the upper part of the mold 30 via the mold adjusting screw 70, the second horizontal piece 62 is arranged on the side closer to the inner lower side of the mold 30. This anchor plate 60 can be suitably applied to the large formwork 30 having a high overall height.

  (d) The anchor plate 60 is provided with an anchor bolt holding portion (bolt insertion hole 64) at each of a plurality of positions along the longitudinal direction of the mold frame 30, and the mold is adjusted for each anchor bolt holding portion (bolt insertion hole 64). The screw 70 and the reinforcing plate adjusting screw 80 are attached. Accordingly, when the anchor bolts 25 are embedded and fixed at a plurality of positions adjacent to the foundation, the single anchor plate 60 (60B) can correspond to the anchor bolts 25 and the reinforcing plate 26, and the number of anchor plates 60 used can be reduced. Also, the number of reinforcement steps can be reduced.

  When the anchor plate 60 has a first horizontal piece 61 provided with a mold adjusting screw 70 and a second horizontal piece 62 provided with a reinforcing plate adjusting screw 80, the construction jig 50A shown in FIG. A second horizontal piece 62 is provided at the upper end of an upward bent portion 63A bent upward from the horizontal piece 61.

  In the construction jig 50A, as shown in FIG. 12, when the first horizontal piece 61 of the anchor plate 60 is arranged on the upper part of the mold 30 via the mold adjusting screw 70, the second horizontal The piece 62 is disposed above the mold 60, and the anchor plate 60 can be suitably applied to the small mold 30 having a low overall height.

  Although the embodiments of the present invention have been described in detail with reference to the drawings, the specific configuration of the present invention is not limited to these embodiments, and even if there is a design change or the like without departing from the gist of the present invention. It is included in the present invention.

FIG. 1 is a cross-sectional view showing a foundation structure with anchor bolts. FIG. 2 is a schematic perspective view showing a foundation structure with anchor bolts. FIG. 3 is a cross-sectional view showing an example in which a building structure is installed on a foundation structure with anchor bolts. FIG. 4 is a plan view showing a construction jig. FIG. 5 is an end view showing the construction jig. FIG. 6 is an end view showing the construction jig. FIG. 7 is a schematic diagram showing a position where the construction jig is used in a unit building. FIG. 8 is a schematic diagram showing a position where the construction jig is used in a unit building. FIG. 9 is a cross-sectional view showing a state in which the construction jig is set on the mold. FIG. 10 is a cross-sectional view showing the pouring state of ready-mixed concrete. FIG. 11 is an end view showing the construction jig. FIG. 12 is a cross-sectional view showing a state in which the construction jig is set on the mold.

Explanation of symbols

24 Concrete foundation 25 Anchor bolt 26 Reinforcement plate 30 Formwork 50, 50A Construction jig 60 Anchor plate 61 First horizontal piece 62 Second horizontal piece 63 Downward bending portion 63A Upward bending portion 64 Bolt insertion hole (anchor bolt holding) Part)
80 Reinforcing plate adjustment screw

Claims (4)

A construction jig for a foundation structure with anchor bolts, in which a reinforcing plate provided in the middle part of the anchor bolt is embedded and fixed in the upper part of the concrete foundation,
An anchor plate and a reinforcing plate adjusting screw provided on the anchor plate;
The anchor plate is held at the top of the opposite formwork, holding the upper end of the anchor bolt,
Reinforcement plate adjustment screw is a jig for construction of foundation structure with anchor bolts that abuts the reinforcement plate and adjusts the height position of the reinforcement plate relative to the anchor plate.   The anchor plate has a first horizontal piece that is held on the upper part of the mold, and a second horizontal piece that includes a reinforcing plate adjustment screw, and is a downward bent portion that is bent downward from the first horizontal piece. The construction jig for a foundation structure with anchor bolts according to claim 1, wherein a second horizontal piece is provided at the lower end.   The anchor plate has a first horizontal piece that is held on the upper part of the formwork, and a second horizontal piece that is provided with a reinforcing plate adjusting screw, and is an upward bent portion that is bent upward from the first horizontal piece. The construction jig for a foundation structure with anchor bolts according to claim 1, wherein a second horizontal piece is provided at an upper end.   The said anchor plate is provided with the anchor bolt holding | maintenance part in each of the several position along the longitudinal direction of a formwork, The reinforcement plate adjustment screw is attached to each anchor bolt holding | maintenance part, It has in any one of Claims 1-3. Jig for construction of foundation structure with anchor bolts.

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