JP2000248747A - Anchor bolt installation jig and foundation construction method - Google Patents

Abstract

(57) [Problem] To provide an anchor bolt installation jig used for construction of a foundation on which a plurality of building units are installed adjacent to each other, to be able to cope with various foundation forms with a minimum of standard jigs. Jig layout work should also be simplified. SOLUTION: An anchor bolt installation jig 40 (41, 51, 61) which is mounted and fixed on a formwork 30 and has a longitudinal dimension determined by an integral multiple of the module m of the building unit 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jig for installing an anchor bolt and a method of constructing a foundation.

[0002]

2. Description of the Related Art Conventionally, as an anchor bolt installation jig,
As described in Japanese Utility Model Publication No. 6-45000, a bolt insertion portion having an anchor bolt insertion hole fixed and mounted on a pair of formwork juxtaposed to construct a concrete foundation, and concrete. Some include a charging window-like portion and a formwork attaching portion to which a fixture to the formwork is attached. According to this conventional technique, concrete can be poured into the formwork with the anchor bolt buried in the concrete foundation set at a predetermined position between the forms.

In this prior art, for example, 1 m, 2 m
By providing short jigs of the same length, and by partially overlapping these short jigs in the longitudinal direction and connecting, for example,
It can be applied to long concrete foundations such as 8m and 10m.

[0004]

However, when the prior art anchor bolt installation jig is to be applied for the construction of a foundation on which a plurality of building units are installed adjacent to each other, the form of the foundation is a combination of the building units. Changes too much, and it cannot be easily coped with simply by connecting a short jig.

The basic form of the foundation is such that a foundation corner portion where the girder foundation and the wife direction foundation intersect at right angles corresponding to the beam ends in the girder direction and the wife direction of the building unit, and one side of the building unit, In the middle of the long foundation corresponding to the middle part of the long beam when it is long, the girder foundation and the two building units corresponding to the continuous girder beam of both building units at the connection part of adjacent building units There are three types of basic joints in which the wide base in the width direction corresponding to the adjacent beam in the cross direction intersects in a T-shape. In the case of a mere short jig of the prior art, the above-described basic
Of the types, even if it can handle the middle of the long foundation,
Basic corners and joints cannot be handled immediately, and special jigs must be prepared each time.

SUMMARY OF THE INVENTION An object of the present invention is to provide an anchor bolt installation jig for constructing a foundation on which a plurality of building units are installed adjacent to each other. This also simplifies the work of allocating jigs.

[0007]

According to the present invention, a plurality of building units are mounted and fixed on a pair of formwork juxtaposed to construct a foundation to be installed adjacently, A bolt insertion portion having an anchor bolt insertion hole,
In an anchor bolt including a concrete input window-like portion and a form attaching portion to which a fixture to a form is attached, a longitudinal dimension is determined by an integral multiple of a module of a building unit. It is in.

According to a second aspect of the present invention, in the first aspect of the present invention, the jig further corresponds to an end jig corresponding to a beam end of a building unit and an intermediate jig corresponding to a beam end of a building unit. And a joint jig corresponding to the connection between the building units.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the jig is further provided with a mark at a position corresponding to the module in the longitudinal direction. It is.

The present invention described in claim 4 is the first to third aspects of the present invention.
Is a method for constructing a foundation in which any one of the anchor bolt installation jigs is placed on a foundation formwork, and concrete is cast in a state where the anchor bolts are hung on the anchor bolt installation jig.

According to a fifth aspect of the present invention, in addition to the fourth aspect of the present invention, when the anchor bolt installation jig is placed on a foundation form, the foundation is fitted on the form. The fixing is performed via a fixing tool having fixing pins.

According to a sixth aspect of the present invention, in accordance with the fourth or fifth aspect of the present invention, when the anchor bolt installation jig is placed on a foundation form, an anchor bolt installation jig is further provided. Are placed one on top of the other.

[0013]

According to the first aspect of the present invention, the following operations are provided. In a unit building, a foundation (cloth foundation) is to be provided immediately below the load-bearing wall of each building unit constituting the unit building.
Therefore, the length of the foundation is basically determined to be an integral multiple of the module (reference dimension) of the building unit. In the present invention, the longitudinal dimension of the anchor bolt installation jig is set to an integral multiple of the module of the building unit. Therefore, by simply connecting a plurality of these jigs, it is possible to directly cope with a base of any length.

According to the second aspect of the present invention, the following operations are provided. As basic forms of the foundation, there are three basic corners corresponding to the beam ends of the building units, a long intermediate base corresponding to the intermediate beams of the building units, and a basic joint corresponding to the connection of the adjacent building units. There are types. In the present invention, end jigs corresponding to each of these three types of foundations,
Three types of intermediate jigs and joint jigs were standardized.
Therefore, when allocating some anchor bolt installation jigs to the entire foundation, it is sufficient to assign any of the standard jigs to any part of the foundation.

According to the third aspect of the present invention, the following operations are provided. Since a mark corresponding to the above-described module is provided in the longitudinal direction of the jig, the mark can be used as a guide when arranging the jig on site, and the workability of allocating the jig can be further simplified. In addition, by using this mark, it is possible to reduce the installation of the water thread in the manner of use, and to perform the installation reference marking of the building unit after the foundation is completed.

According to the present invention, the following effects are obtained. With the anchor bolts buried in the concrete foundation for a plurality of building units being set at predetermined positions in the formwork, when casting concrete into the formwork, the above-mentioned to the following, the minimum standard jig Accordingly, it is possible to cope with various types of foundations, and the work of allocating jigs on site can be simplified.

According to the present invention, the following effects are obtained. When mounting the anchor bolt installation jig on the base form, the anchor bolt installation jig is fixed through a fixture having a fixing pin. It can be easily attached to and detached from the top without deforming the formwork.

According to the sixth aspect of the present invention, the following operations are provided. When placing the anchor bolt installation jig on the base formwork, the ends of the anchor bolt installation jig shall be placed on top of each other, so that the arrangement of the mutually connected jigs is linear. , The squareness can be easily secured.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an arrangement of unit buildings and structural blocks and an arrangement of foundations, (A) is a perspective view showing a unit building, (B) is a plan view showing a structural block,
(C) is a plan view showing a foundation, FIG. 2 shows an anchor bolt installation jig, (A) is a plan view showing an end jig, (B) is a plan view showing an intermediate jig, and (C) is a joint. FIG. 3D is a plan view showing a jig, FIG. 3A is a plan view showing a jig allocation at a corner corner, FIG. 3A is a plan view showing a building unit, and FIG. FIG. 4 shows the layout of jigs in the middle of a long foundation, (A) is a plan view showing a building unit, (B) is a plan view showing a jig, and FIG. 5 is a base joint. FIG. 6A is a plan view showing a building unit, FIG. 6B is a plan view showing a jig, FIG. 6 is a perspective view showing a use state of an end jig, and FIG. It is a perspective view which shows the use condition of a jig.

The unit building 10 is, as shown in FIG. 1A, a joined body of a plurality of building units 11, and has a first floor, a second floor,
A series of units that are continuous in the direction of the wife, including the floor and the roof, is called a structural block. This structural block bears vertical and horizontal loads, and adopts a structural plan that connects the structural blocks to form the entire building. I have.

FIG. 1B shows the structural blocks of the unit building 10 shown in FIG.
The zero foundation 20 is constructed by providing a cloth foundation immediately below the load-bearing wall of each building unit 11 constituting a structural block, as shown in FIG. 1 (C). In the foundation 20, a foundation corner portion 21 where the girder foundation and the wife direction foundation intersect at right angles corresponding to the beam ends of the building unit 11 in the beam direction and the wife direction, and one side of the building unit 11 is long. The long base intermediate part 22 corresponding to the middle part of the long beam at the time of the length, and both building units 1 at the connection part of the adjacent building units 11 and 11
A foundation joint part in which a girder foundation corresponding to the continuous girder beams 1 and 11 and a wide-girder foundation (20B) corresponding to the adjacent girder beams of both building units 11 and 11 intersect in a T-shape. 23 as the basic form, and these 3
The entire foundation 20 is to be constructed by a combination of the basic corner portions 21, the intermediate long foundation portions 22, and the foundation joint portions 23.

In the foundation 20, a portion located immediately below the load-bearing wall of the single building unit 11 is a standard width portion 20.
A, and a portion located immediately below two adjacent load-bearing walls of adjacent building units 11, 11 is a wide portion 20B.

Here, in the building unit 11, the length of the module in the girder direction is 910 mm, and the length of the module in the width direction is 455 mm, and their dimensions are determined.

However, in the present embodiment, as shown in FIGS. 6 and 7, for example, they are placed and fixed on a pair of molds 30, which are juxtaposed to construct the above-mentioned foundation 20,
An anchor bolt 31 buried in the foundation 20 is fixed to the formwork 30,
In the state of being suspended and set at a predetermined position between
Jig 40 capable of placing concrete in 0, 30
Basically, the end jig 41, the intermediate jig 51, and the joint jig 61 shown in FIGS. 2A to 2C are used.

As the jig 40, in addition to the standard width jig used corresponding to the standard width portion 20A of the foundation 20,
There is a wide jig used corresponding to the wide portion 20B of the foundation 20. 2A to 2C show jigs 41, 51, and 61 as standard width jigs. FIG. 2D shows the end jig 41 as a wide jig, but an intermediate jig and a joint jig as a wide jig can also be used.

Hereinafter, each of the end jig 41, the intermediate jig 51, and the joint jig 61 will be described.

(End Jig 41) (FIGS. 3 and 6) The end jig 41 corresponds to the beam corners of the building unit 11 in the girder direction and the end direction, and the base corner 21 of the base 20 described above.
3 and the other end jig 41 in FIG.
It is used as shown in FIG.

That is, the end jig 41 is attached to the anchor bolt 31.
The bolt insertion portion 42 having the insertion hole 42A is provided at a plurality of appropriate positions, and the concrete input window portion 43 is provided.
Are provided at appropriate plural positions. In addition, the end jig 41 appropriately has a form mounting hole 45 (form mounting portion) to be fixed to a fixing pin 44A of a fixing fitting 44 (fixing tool) which is fitted to and detached from the form 30. Prepare at multiple positions.

At this time, the end jig 41 is attached to the building unit 1.
A longitudinal dimension is determined by an integral multiple of the above-described module m, and a V-shaped mark 46 is provided at a position corresponding to the module in the longitudinal direction. Therefore, in the girder end jig 41, the above-mentioned module becomes 910 mm, and in the end end jig 41, the above-mentioned module becomes 455 mm.

The end jig 41 includes another intermediate jig 51,
As a feature different from the joint jig 61, a V-shaped mark 47 for positioning at a right angle is provided at one end in the longitudinal direction. As shown in FIG. 6, when the end jig 41 is arranged corresponding to the base corner 21 together with the other end jigs 41, the girder end jig 41A and the end jig 41B are partially overlapped at their ends. The mark 47 of the girder end jig 41A and the mark 46 of the girder end jig 41B, the mark 46 of the girder end jig 41A, and the girder end jig 41B
By aligning the marks 47, the girder end jig 41A and the end jig 41B can be positioned so as to intersect at right angles.

Therefore, the end jig 41 is used together with the other end jigs 41 as follows, and the foundation corner 21 of the foundation 20 can be constructed (FIG. 6).

(1) The fixing brackets 44 are fitted and attached to the molds 30, 30 for the corners 21 of the foundation 20.

(2) The girder end jig 41A is placed on the formwork 30 on the girder side, and the form mounting holes 45 of the girder end jig 41A are attached to the fixing pins 44A of the fixing bracket 44. Subsequently, the jig 41B is partially overlapped with the girder jig 41A and placed on the formwork 30 on the wife side, and the form fitting holes 45 of the jig 41B are fixed to the fixing pins 44A of the fixing fitting 44. To wear.

(3) A nut 31A for adjusting the height is screwed onto the threaded portion of the anchor bolt 31, and this anchor bolt 31 is connected to the bolt insertion portion 42 of the girder end jig 41A and the end jig 41B which overlap each other. And the fixing nut 31B is attached to the end of the insertion hole 42A.

(4) The mark 47 of the girder end jig 41A and the girth end jig 4 are partially overlapped with the girder end jig 41A and the girder end jig 41B.
After the mark 46 of 1B, the mark 46 of the girder end jig 41A, and the mark 47 of the girder end jig 41B are matched, the fixing nut 31B of the anchor bolt 31 is tightened, and the girder end jig 4
1A and the end jig 41B intersect at a right angle.

(5) Concrete is poured from the concrete loading window 43 of the girder end jig 41A and the end jig 41B, and the corner 21 of the foundation 20 is cast. Thereafter, the fixing nut 31B is removed, and the jigs 41A and 41B are removed from the mold 30.
To remove the fixing bracket 44 and remove the mold 3
By removing the mold 0, the corner portion 21 of the foundation 20 in which the anchor bolt 31 is buried at an accurate position is completed.

(Intermediate Jig 51) (FIGS. 4 and 7) The intermediate jig 51 is standardized in correspondence with the above-described base intermediate portion 22 of the foundation 20, which corresponds to the long beam intermediate portion of the building unit 11. For example, the end jig 41 (or another intermediate jig 5)
It is used as shown in FIGS. 4 and 7 together with 1).

That is, the intermediate jig 51 is mounted on the anchor bolt 3
The bolt insertion portion 52 having one insertion hole 52A is provided at a plurality of appropriate positions, and the concrete input window portion 5 is provided.
3 is also provided at appropriate plural positions. In addition, the intermediate jig 51
Fixing fittings 54 (fixing tools) fitted to and detached from the mold 30
Are provided at a plurality of appropriate positions.

At this time, the intermediate jig 51 has a longitudinal dimension determined by an integral multiple of the module m of the building unit 11 and has a V-shaped cut mark 56 at a position corresponding to the module in the longitudinal direction. Therefore, in the girder intermediate jig 51, the above-mentioned module becomes 910 mm, and in the wife intermediate jig 51, the above-mentioned module becomes 455 mm.

Therefore, the intermediate jig 51 is used together with the end jig 41 (or another intermediate jig 51) as follows, and the intermediate portion 22 of the foundation 20 can be constructed (FIG. 7).

(1) Form 3 for the intermediate part 22 of the foundation 20
The fittings 54 are fitted to the fittings 0 and 30 and attached.

(2) The intermediate jig 51 is placed on the mold 30, and the mold mounting hole 55 of the intermediate jig 51 is fixed to the fixing pin 5 of the fixing metal 54.
Attach to 4A. Subsequently, the end jig 41 is partially moved to the intermediate jig 51.
To the formwork mounting hole 45 of the end jig 41.
To the fixing pin 54A of the fixing bracket 54.

(3) A nut 31A for adjusting the height is screwed onto the screw portion of the anchor bolt 31, and this anchor bolt 31 is attached to the intermediate jig 51 and the end jig 41 by the bolt insertion portions 52 and 42 which overlap each other. Are inserted into the insertion holes 52A and 42A, and the fixing nut 31B is attached to the insertion end.

(4) The mark 56 of the intermediate jig 51 and the mark 4 of the end jig 41 at the part where the intermediate jig 51 and the end jig 41 partially overlap.
6 and the intermediate jig 51 and the end jig 41 are positioned in the longitudinal direction.
Of the intermediate jig 51 and the end jig 4
1 are continuously arranged on a straight line.

(5) Concrete is poured from the window portions 53 and 43 for concrete loading of the intermediate jig 51 and the end jig 41, and the intermediate portion 22 of the foundation 20 is cast. Thereafter, the fixing nut 31B is removed, the jigs 51 and 41 are removed from the formwork 30, the fixing fittings 54 are collected, and the formwork 30 is removed from the base 20 in which the anchor bolts 31 are embedded in correct positions. Is completed.

(Joint Jig 61) (FIG. 5) The joint jig 61 is used for the adjacent building units 11,11.
5 is standardized corresponding to the above-mentioned joint portion 23 of the foundation 20 corresponding to the contacting portion, and is used together with the wide end jig 41 as shown in FIG.

That is, the joint jig 61 has the bolt insertion portions 62 provided with the insertion holes 62A for the anchor bolts 31 at appropriate plural positions, and also has the concrete input window-like portions 63 at appropriate plural positions. . Further, the joint jig 61 is provided with a form mounting hole 65 (form) to be fixed to a fixing pin (not shown) of a fixing fitting (fixing tool) (not shown) which is fitted to and detached from the form 30. Attachment parts) are provided at appropriate plural positions.

At this time, the joint jig 61 has a longitudinal dimension determined by an integral multiple of the module m of the building unit 11 and has a V-shaped mark 66 at a position corresponding to the module in the longitudinal direction. Therefore, in the girder joint jig 61, the above-mentioned module becomes 910 mm, and in the wife joint jig 61, the above-mentioned module becomes 455 mm.

The joint jig 61 is different from the other end jigs 41 and the intermediate jigs 51 in that the end jigs 41 are partially overlapped and connected at the middle part in the longitudinal direction. The interval between the mark 66 provided on one side in the longitudinal direction of the joint jig 61 and the mark 66 provided on the other side is p different from the module m. This p is equivalent to the joint allowance of the adjacent building units 11 and 11.

Accordingly, the joint jig 61 is used together with the wide end jig 41 as follows.

(1) Fixing fittings are fitted and attached to the molds 30, 30 for the joints 23 of the foundation 20.

(2) Connect the joint jig 61 to the formwork 30 on the girder side.
Then, the form mounting hole 65 of the joint jig 61 is mounted on the fixing pin of the fixing bracket. Subsequently, the end jig 41 is partially overlapped with the joint jig 61 and placed on the form frame 30 on the wife side, and the form fixing holes 45 of the end jig 41 are fixed to the fixing pins of the fixing metal.

(3) A nut 31A for adjusting the height is screwed onto the threaded portion of the anchor bolt 31, and the anchor bolt 31 is inserted into the bolt insertion portion 62 of the joint jig 61 and the end jig 41 which overlap each other. It is inserted into the attachment hole 62A, and the fixing nut 31B is attached to the insertion end.

(4) At a partially overlapping portion of the joint jig 61 and the end jig 41, each of the two marks 66 of the joint jig 61 and one end of the end jig 41 are provided for right-angle positioning. After matching each of the two marks 47, the fixing nut 31B of the anchor bolt 31 is tightened, and the joint jig 61 and the end jig 41 are arranged to intersect at right angles.

(5) Concrete is introduced from the concrete introduction windows 63 and 43 of the joint jig 61 and the end jig 41, and the joint 23 of the foundation 20 is cast. Thereafter, the fixing nut 31B is removed, and the jigs 61 and 41 are removed from the form 3
0, remove the fixing bracket, and
Is removed, the construction of the joint portion 23 of the foundation 20 in which the anchor bolt 31 is buried at the correct position is completed.

Therefore, according to the present embodiment, the following operations are provided. In the unit building 10, a foundation 20 is provided immediately below the bearing wall of each building unit 11 constituting the unit building 10. Therefore, the length of the foundation 20 is basically determined to be an integral multiple of the module (standard dimension) of the building unit 11, and in the present invention, the anchor bolt installation jig 40 is used.
Since the longitudinal dimension of (41, 51, 61) is set to an integral multiple of the module of the building unit 11, simply connecting the plurality of jigs 40 can directly support the base 20 of any length.

As a basic form of the foundation 20, a foundation corner portion 21 corresponding to the beam end of the building unit 11, a long intermediate foundation portion 22 corresponding to the beam intermediate portion of the building unit 11,
There are three types of foundation joint portions 23 corresponding to the connection portions of adjacent building units 11. In the present invention, three types of end jig 41, intermediate jig 51, and joint jig 61 corresponding to each of these three types of the foundation 20 are standardized. Therefore, when allocating some anchor bolt installation jigs 40 (41, 51, 61) to the entire foundation 20, the standard jigs 40 (4
1, 51, 61) will suffice.

In the longitudinal direction of the jig 40 (41, 51, 61), marks 46, 56,
66, the jig 40 (41, 51, 6
In the allocation of 1), the marks 46, 56, 66 can be used as a guide, and the workability of the allocation of the jigs 40 (41, 51, 61) can be further simplified. In addition, the marks 46, 5
By using 6, 66, it is possible to reduce the installation of the water thread in the way of using, and to perform the installation reference marking of the building unit 11 after the foundation is completed.

An anchor bolt 31 buried in a concrete foundation for a plurality of building units 11 is
When concrete is poured into the formwork 30 in the state where it is set at a predetermined position in the above, the minimum standard jigs 40 (41, 51, 61) correspond to various forms of the foundation 20 as described above. It is possible, and the jig 40 (41,
51, 61) can also be simplified.

The anchor bolt installation jig 40 (41, 5)
(1) and (61) are mounted on the base form 30 through the fixing fittings 44 and 54 which can be fitted on the base form 30 and have the fixing pins 44A and 54A. The installation jig 40 (41, 51, 61) is
0 can be easily attached and detached, and the mold 30 is not deformed.

The anchor bolt installation jig 40 (41, 5
When the (1, 61) is placed on the base formwork 30, the ends of the anchor bolt installation jigs 40 (41, 51, 61) are placed on top of each other, so that they are connected in phase. Jig 4
The linearity and the perpendicularity of the arrangement of the 0s (41, 51, 61) can be easily secured.

The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration of the present invention is not limited to this embodiment, and the design may be changed without departing from the scope of the present invention. The present invention is also included in the present invention.

[0063]

As described above, according to the present invention, when the anchor bolt installation jig is used to construct a foundation on which a plurality of building units are installed adjacent to each other, various types of foundations can be formed with a minimum number of standard jigs. And the work of arranging jigs on site can be simplified.

[Brief description of the drawings]

FIG. 1 shows the arrangement of unit buildings, structural blocks, and foundations, wherein (A) is a perspective view showing unit buildings, (B) is a plan view showing structural blocks, and (C) is a foundation. FIG.

FIG. 2 shows an anchor bolt installation jig, and (A)
Is a plan view showing an end jig, (B) is a plan view showing an intermediate jig, (C) is a plan view showing a joint jig, and (D) is a plan view showing a wide jig.

FIG. 3 shows the layout of jigs at the foundation corners;
(A) is a plan view showing a building unit, and (B) is a plan view showing a jig.

FIG. 4 shows the layout of jigs at the middle of a long foundation.
(A) is a plan view showing a building unit, and (B) is a plan view showing a jig.

FIGS. 5A and 5B show the layout of jigs at a foundation joint portion, where FIG. 5A is a plan view showing a building unit, and FIG. 5B is a plan view showing a jig.

FIG. 6 is a perspective view showing a use state of the end jig.

FIG. 7 is a perspective view showing a use state of the intermediate jig.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Building unit 20 Foundation 30 Formwork 31 Anchor bolt 40 Jig 41 End jig 51 Intermediate jig 61 Joint jig 62 Bolt insertion part 42A, 52A, 62A Insertion hole 43, 53, 63 Concrete input window part 44, 54 Fixing bracket (fixing tool) 44A, 54A Fixing pin 45, 55, 65 Formwork mounting hole (formwork mounting part) 66 Mark

Continued on the front page F term (reference) 2D046 AA04 2E125 AA45 AA73 AB12 AC04 BA03 BA22 BB08 BB30 BE07 BE08 BF01 CA04 CA14 EA01 EA05 EA11 EA32 EB12 2E174 AA03 BA02 BA03 DA07 DA11 DA22 DA32 DA40 DA57 DA58 DA63

Claims (6)

[Claims] 1. A bolt insertion portion, which is mounted and fixed on a pair of formwork juxtaposed to construct a foundation on which a plurality of building units are installed adjacent to each other, and has an anchor bolt insertion hole. In an anchor bolt comprising a concrete input window-like portion and a form attaching portion to which a fixture to a form is attached, a longitudinal dimension is determined by an integral multiple of a module of a building unit. Characteristic anchor bolt installation jig. 2. The method according to claim 1, wherein the jig includes an end jig corresponding to a beam end of the building unit, an intermediate jig corresponding to a middle portion of the beam of the building unit, and a joint jig corresponding to a connection between the building units. The jig for installing an anchor bolt according to claim 1, comprising three types of jigs. 3. The under bolt installation jig according to claim 1, wherein the jig is provided with a mark at a position corresponding to the module in a longitudinal direction. 4. An anchor bolt installation jig according to any one of claims 1 to 3, which is placed on a base formwork, and concrete is poured while the anchor bolt is hung on the anchor bolt installation jig. How to build a featured foundation. 5. The method according to claim 1, wherein the anchor bolt installation jig is mounted on a foundation form via a fixture having a fixing pin capable of fitting the foundation onto the formwork. 4. The method of constructing a foundation according to 4. 6. The method according to claim 4, wherein when the anchor bolt installation jig is placed on the base formwork, the ends of the anchor bolt installation jig are placed one on top of another. How to build the basis of the description.