JP2000073570A - Building construction in narrow site - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a building construction method in a narrow site which can move an external wall body by a stable reaction body. SOLUTION: In this building construction method in a narrow site, a ground sill is fixed on a foundation provided in a narrow site put between right and left adjacent area boundary lines, and a pair of right and left external wall bodies 2 is assembled on the ground sill at a position which moves back more inward than a foundation positioned on the side of right and left adjacent area boundary lines, and a stretchable brace beam 3 is set between these external wall bodies 2, and the external wall body 2 on one side is supported by a temporary brace 4 to form a reaction body, and the external wall body on the other side is moved above the foundation on the side of the adjacent boundary line by the stretch of the brace beam 3. The external wall body 2 is provided with an upper fixture exclusive for a brace 11 and the ground sill is provided with a lower fixture exclusive for the brace 12, and the upper and lower ends of the temporary brace 4 are detachably attached to the upper and lower fixture exclusive for the braces 11, 12 to form a reaction body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a narrow land construction method employed when a building is constructed so as to be in contact with a neighbor at a construction site on a narrow land sandwiched between adjacent boundaries.

[0002]

2. Description of the Related Art As a construction method for narrow land, assembling in a state where outer wall bodies on both left and right sides of the building are respectively erected at a position retracted inside from a foundation located on the left and right adjacent land boundary side sandwiching the narrow land, There has been proposed a method in which one outer wall is used as a reaction body to move the other outer wall to a foundation on the adjacent ground boundary line side.

[0003]

However, when the outer wall is used as a reaction force body, the extra long wood at the site is used as a brace, and both ends of the long wood are attached to the outer wall and the foundation of the foundation. The nails are fixed to the nails, so the material of the long wood may cause cracks, etc. There has been a problem that work safety cannot be improved due to a decrease. The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a narrow-land construction method capable of moving an outer wall by a stable reaction body. is there.

[0004]

In order to achieve the above object, a narrow land construction method according to the first aspect of the present invention comprises fixing a base to a foundation provided on a narrow land sandwiched between left and right adjacent land boundaries, Assemble a pair of left and right outer walls of the building on the base at a position recessed inward from the foundation located on the left and right adjacent land boundary side, interpose an extendable stay beam between these outer walls, and one outer wall In a narrow land construction method in which the body is supported by temporary braces to form a reaction body, and the other outer wall body is moved to the foundation on the adjacent land boundary side by extending the stay beam,
An upper bracket dedicated to the brace is provided on the outer wall, and a lower bracket dedicated to the brace is provided on the base. The upper and lower ends of the temporary brace are detachably attached to the upper brace and the lower brace. It is characterized by forming a force body.

According to a second aspect of the present invention, there is provided a narrow-land construction method according to the first aspect, wherein a clamp is attached to a fixture main body fixed to a pillar to form the upper attachment dedicated to the brace. And

According to a third aspect of the present invention, there is provided a narrow-field construction method according to the first or second aspect, wherein a clamp is attached to a fixture main body fixed to a base to form the lower attachment dedicated to the brace. It is characterized by having done.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a construction method of a narrow land according to the present invention. First, the contents of this method will be outlined. As shown in FIGS. 1 to 3, a foundation 1 is provided on a narrow land A, and a pair of left and right sides is formed on the foundation 1 which is retreated inward from the foundation 1 located on the left and right adjacent ground boundary lines B sandwiching the narrow land A. After assembling with the outer wall bodies 2 and 2 standing upright, an extendable stay beam 3 is interposed between the outer wall bodies 2 and 2 and one outer wall body 2 is connected to the temporary brace 4.
Supported by Next, as shown in FIGS. 4 and 5, the stay beam 3 was extended using one outer wall body 2 as a reaction force body, and the other outer wall body 2 was moved onto the foundation 1 on the side of the adjacent ground boundary line B. After that, the other outer wall body 2 is fixed to the foundation 1 on the adjacent ground boundary line side,
While removing the temporary brace 4 from one outer wall 2,
The temporary brace 4 is attached to the other outer wall 2. Next, the stay beam 3 is extended using the other outer wall body 2 as a reaction force body to move one outer wall body 2 onto the foundation 1 on the adjacent ground boundary line side,
As shown in FIG. 6, one outer wall 2 is fixed to the foundation 1 on the boundary side of the adjacent ground, and a floor beam 5 is erected between the outer walls 2.

[0010] As shown in FIG. 11, the stay beam 3 is connected to the through pillar 2 A constituting the outer wall body 2 by using a stay beam connector 6, an adapter 7 and a beam connector 8.

As shown in FIG. 13, the stay beam 3 is formed with female threads 3b and 3c, which are reverse-threaded, on the inner periphery of a stay beam body 3a made of an outer tube, and inserted from both ends of the stay beam body 3a. A male screw portion 3e, 3f having a reverse thread is formed on each outer periphery of the pair of left and right inner tubes 3d, and the male screw portions 3e, 3f of the inner tube 3d are screwed to the female screw portions 3b, 3c. I have. A fixing plate 3h having a stopper hole 3g for fixing the adapter 7 is attached to the tip of each inner tube 3c.

The stay beam connecting device 6 is for connecting the stay beam 3 to the leg of the through column 2A, and as shown in FIG. 14, connects a pair of connecting plate portions 61 to a flat section U-shaped mounting portion. 62
And a jack receiving plate 63 attached to the lower ends of a pair of connecting plate portions 61, and a V having a fitting portion 61a at the bottom of the upper edge of each connecting plate portion 61.
A receiving groove 61b in the shape of a letter is formed, and below the receiving groove 61b, three stopper holes 61c are provided in the vertical direction at the same interval as a stopper hole 81c of the beam connector 8 described later. 61b
The distance between the stopper fitting portion 61a and the uppermost stopper hole 61c is set to be the same as the distance between the stopper holes 61c, and the attachment portion 62 is provided with a stopper hole 62a.

The adapter 7 is used to connect the stay beam 3 to the beam connecting device 8 and the stay beam connecting device 6. As shown in FIG. It is configured to be attached to. Each joint plate 71 has three stopper holes 71a, 71b, 71c.
Are vertically arranged at the same interval as a stopper hole 81c of the beam connector 8 and a stopper hole 61c of the stay beam connector 6 described later. The hole diameter of the central stopper hole 71b is the upper and lower stopper holes 71a,
It is set to be larger than the hole diameter of 71c,
When the outer wall 2 is moved up and down with the jack J to fix the outer wall 2 to the adjacent boundary side outer foundation 1, the stay beam 3 swings up and down as the outer wall 2 moves up and down, and the up and down movement of the outer wall body 2 is obstructed by the stay beam 3. Not to be. Then, as shown in FIG. 11, the adapter 7 is fixed to fixing plates 3h at both ends of the stay beam 3 with fasteners a such as bolts.

The beam connecting member 8 is for connecting the floor beam 5 to the through column 2A, and comprises a pair of beam connecting plate portions 81 and a mounting portion 82 as shown in FIG. 8
A V-shaped notch 81b having a stopper fitting portion 81a at the bottom is formed at the upper edge of the first member 1. Three stopper holes 81c are vertically arranged at equal intervals below the notch 81b. The distance between the stopper fitting portion 81a of the notch 81b and the uppermost stopper hole 81c is set to be the same as the distance between the stopper holes 81c. The beam connecting member 8 is used to connect the stay beam 3 to the through column 2A before connecting the floor beam 5 to the through column 2A.
1 is fixed to the through column 2A.

The outer wall 2 assembled at a place retreated inside the foundation 1 located on the side of the adjacent land boundary is moved to the foundation 1 on the side of the adjacent land boundary by the rail 9 and the bogie 10 shown in FIG. The rail 9 is configured such that side plate portions 9b are suspended from both sides of a rail body 9a, and a plurality of locking holes 9d are formed in each side plate portion 9c at regular intervals in the length direction. The cart 10 has a roller 10c attached to a cart body 10b having an upper surface serving as a mounting portion 10a of the base 2B of the outer wall 2, and a temporary fixing piece 10d is erected from the rear of the cart body 10b.
A hanging plate 10e is provided from both sides of the bogie main body 10b, and the hanging plate 10e is provided with a locking hole 10f.

The temporary brace 4 is formed of a metal pipe, and as shown in FIG.
1 and a brace-dedicated lower attachment 12 for detachably attaching to the through column 2A and the base 13 of the outer wall body 2. As shown in FIG. 16 and FIG. 17, the brace-specific upper fixture 11 fixes a pair of right and left clamps 11 b to both ends of a horizontal bar 11 a and projects a pair of left and right brackets 11 c from an intermediate portion of the horizontal bar 11 a. The bracket 11c is formed by drilling a mounting hole 11d at the tip of the bracket 11c. As shown in FIG. 18, the brace-specific upper fitting 11 overlaps the beam connecting tool 8 attached to the column 2A through the bracket 11c, and has the mounting hole 11d of the brace-specific upper fitting 11 and the lowermost end of the beam connecting tool 8. The upper bracket 11 for exclusive use of the brace can swing up and down around the mounting hole 11d, so that the temporary brace 4 It can correspond to the angle of. Then, the upper end of the temporary brace 4 is fixed to the through column 2A by the clamp 11b of the upper attachment 11 dedicated to the brace.

As shown in FIGS. 19 and 20, the lower mounting bracket 12 for exclusive use of the brace has a pair of clamp mounting bodies 12c fixed to the left and right sides of an upper surface plate 12b of a mounting body 12a having a U-shaped cross section straddling a base 13. Then, each clamp mounting body 12c
A clamp 12d is rotatably mounted on a horizontal axis 12e on the outer side of the frame. An anchor bolt insertion hole 12f is formed in the upper surface plate 12b of the attachment body 12a. As shown in FIG.
In 2, the fixture main body 12 a is fitted into the base 13, and the anchor bolt insertion hole 12 f is inserted into the anchor bolt 16, and is fixed to the anchor bolt 16 by the fixing nut 19. Then, the lower end of the temporary brace 4 is fixed to the base 13 by the clamp 12d of the lower attachment 12 dedicated to the brace.

Next, a narrow-land construction method for constructing a two-story wooden building so as to be in contact with a neighbor C at a construction site on a narrow land A sandwiched between adjacent land boundaries B will be described with reference to FIGS.
2 will be described in detail. First, the construction of the foundation 1 of the building to be built on the narrow land A is performed. As shown in FIG. 1, an adjacent land boundary side outer peripheral foundation 1a is disposed in the depth direction of the narrow land A along the left and right adjacent land boundary lines B, and a frontage side outer peripheral foundation 1b is disposed at the frontage of the narrow land A. A deep-side outer foundation 1c is disposed in the deep part of the narrow land A, and a partition foundation 1d is disposed between the left and right adjacent land boundary-side outer foundations 1a. As shown in FIG. 11, anchor bolts 16 are embedded in the foundation 1 in advance.

Next, as shown in FIG. 2, the base 13 is fixed to the front-side outer foundation 1b, the rear-side outer foundation 1c, and the partition foundation 1d, and rails 9 are attached to both ends of the base 13 with the stoppers a. The rail 9 is extended from the place where the outer wall 2 is assembled to just before the outer peripheral foundation 1.

As shown in FIGS. 2 and 7, the temporary base 14 with the auxiliary rail 15 is connected to the outer peripheral foundation 1 on the boundary side of the adjacent land.
By mounting on the a, the temporary base 14 is connected to the base 13 and the auxiliary rail 15 is connected to the rail 9.

Next, as shown in FIGS. 3 and 4, the carriage 10 is positioned on the rail 9 which is retracted by about 800 mm inside the outer peripheral foundation 1a on the left and right adjacent land boundary. Of the outer wall bodies 2 and 2 located at the position shown in FIG. At this time, as shown in FIG. 12, the bogie 10 is locked by aligning the locking holes 10f of the bogie 10 with any of the locking holes 9d of the rail 9 and inserting the locking pins b into the locking holes 10f and 9d. Temporarily fix. Then, as shown in FIG. 3 and FIG. 4, the external scaffold D is assembled outside the place where the outer wall bodies 2 and 2 are assembled, and the outer wall bodies 2 and 2 are assembled using the external scaffold D. When assembling the outer wall body 2, as shown in FIG. 2, the base 2 </ b> B constituting the outer wall bodies 2 and 2 is mounted on the bogie 10 and temporarily fixed to the temporary fixing pieces 10 d of the bogie 10 with the fasteners a.
As shown in FIG. 3, a through-column 2A, a trunk 2C, and the like are assembled on a base 2B to form a shaft assembly. As shown in FIGS. 8 and 9, this skeleton is attached to a base plywood, a waterproof sheet, a sash, and an outer wall. The outer wall 2 is completed by attaching the plate 2D, the base drainer 2E, and the like.

As shown in FIG. 3, when the outer wall members 2 and 2 are assembled, a retaining beam 3 is previously erected between the through columns 2A of the outer wall members 2 and 2 located on the left and right sides. And the outer walls 2 are supported by the temporary brace 4. Specifically, as shown in FIG. 11, the mounting portion 62 of the stay beam connecting tool 6 is previously fixed to the leg of the column 2A with the fastener a,
Attach the mounting portion 82 of the beam connector 8 at the level of the floor beam, and pass through the column 2A.
And fix it with the stopper. Then, the stay beams 3 are passed between the columns 2A by using the stay beam connecting members 6 and 8 to pass through the stay beams 3.
That is, after the fastener a is inserted in advance into the fastener hole 71a at the upper end of the pair of joint plate parts 71 of the adapter 7, the notch a is cut out of the beam connecting plate part 81 of the beam connecting tool 8 of the column 2A. 81b, and the retaining beam 3
Is temporarily fixed to the beam connector 8, and then the stopper a is inserted into the remaining stopper holes 71 b and 71 c of the joint plate portion 71 of the adapter 7 and the uppermost and middle stopper holes 81 c and 81 c of the beam connector 8.
To extend the stay beam 3 between the columns 2A at the level of the floor beam 5. Further, as described above, the temporary brace 4 includes a brace-specific upper fitting 11 and a brace-specific lower fitting 12.
Is attached to the through column 2A of the outer wall 2 and the base 13. As shown in FIG. 11, the temporary brace 4 is located on both sides of the stay beam 3 by the brace-specific upper attachment device 11 and the brace-specific lower attachment device 12, so that the temporary brace 4 does not interfere with the stay beam 3.

When the extension of the stay beam 3 becomes long,
As shown in FIG. 11, the support beam 17 is supported by a support post 17 in order to prevent buckling and drooping of the stay beam 3, and the support post 17 is erected from near the temporary brace 4 to form a truss type. The outer wall body 2 as a reaction force body can be made stable. Further, by arranging the temporary braces 4 so as to cross each other, the temporary braces 4 can be further stabilized. The support 17 is erected from the ground or the foundation 1, and the support 17 and the stay 3 are connected by a clamp 18.

Further, as shown in FIG.
After the stopper a is inserted in the uppermost stopper hole 71a of the pair of joint plate parts 71, the stopper a is passed through the stopper plate to stop the receiving groove 61b of the connecting plate part 61 of the stay beam connector 6 of the pillar 2A. The retaining beam 3 is dropped into the fitting portion 61a, and the retaining beam 3 is temporarily fixed to the retaining beam connecting device 6. Then, the remaining stopper holes 71b and 71c of the joint plate portion 71 of the adapter 7 and the uppermost step of the retaining beam connecting device 6. By inserting the stopper a into the stopper holes 61c, 61c in the middle stage, the stay beam 3 is passed between the columns 2A.

The outer walls 2, 2 thus assembled
Is moved in the following manner. As shown in FIG. 4, the external scaffold D is removed, the temporary brace 4 of the outer wall 2 to be moved is removed, and the locking pin b is pulled out from the locking holes 10 f and 9 d to temporarily fix the carriage 10. The stay is released, and the stay beam main body 3a of the stay beam 3 is rotated using the remaining outer wall body 2 as a reaction force body to extend the inner tube 3c from the end of the stay beam body 3a. Thereby, the carriage 10 moves on the rail 9, and the outer wall body 2 moves horizontally while the verticality is maintained. Then, the outer wall 2 is moved from the base 13 to the auxiliary rail 15 of the erection base 14 and stopped on the auxiliary rail 15 of the erection base 14.

Next, the outer wall 2 is attached to the outer peripheral foundation 1a on the adjacent land boundary side.
Is fixed with anchor bolts 16. That is, as shown in FIG. 8, the jack J is installed under the jack receiving plate 63 of the stay beam connecting device 6, and the outer wall body 2 is raised so that the temporary
4 and the carriage 10 is removed from the base 2B of the outer wall body 2. Before the outer wall 2 is raised and lowered, the stopper a inserted in the stopper hole 71c located at the lowermost stage of the adapter 7 is previously extracted. Large-diameter stopper hole 71b of adapter 7
Since a large gap is formed between the stopper a and the stopper a inserted through the stopper hole 71b, in a state where the stopper a is removed,
The stay beam 3 at the floor beam level has a notch 81b of the beam connecting device 8.
Can be swung up and down by the amount of the gap around the stopper a in the stopper fitting portion 81a. In addition, the stay beam 3 at the leg level of the through pillar 2A is connected to the receiving groove 61 of the stay beam connector 6.
It is possible to swing up and down by the amount of the gap around the stopper a in b. Thus, as shown in FIGS. 6 and 8, as the outer wall 2 moves up and down, the stay beam 3 also swings up and down with respect to the outer wall 2, so that the outer wall 2 can move up and down. FIG.
The symbol J1 in the inside is the base of the jack J. Thereafter, the base 2B of the outer wall body 2 is fixed to the anchor bolt 16 of the outer peripheral foundation 1a on the adjacent land boundary side.

Next, as shown in FIG. 5, the remaining outer wall 2
Is moved in the same manner as above, and the outer peripheral foundation
a. At this time, the temporary brace 4 is attached to the outer wall body 2 which has already been moved and is fixed to the outer peripheral foundation 1a on the adjacent boundary side.
The temporary brace 4 is removed from the outer wall 2 on the side to be moved, and the locking hole 1 is attached.
The temporary stop of the carriage 10 is released by removing the locking pin b from 0f and 9d.

Next, as shown in FIG. 6, the temporary brace 4 is removed from the outer wall body 2 used as a reaction body, and the stay beam 3 and the stay beam connector 6 are respectively removed from both outer wall bodies 2 and 2. Then, the floor beams 5 are erected between the outer walls 2 and 2. FIG. 10 is a work explanatory diagram for attaching the end of the floor beam 5 to the through pillar 2A of the outer wall body 2. As shown in the figure,
A pair of slit grooves 51 and four through holes 52, 53 are formed at the end of the floor beam 5, and a stopper a is previously inserted into the uppermost through hole 52 of the floor beam 5 before mounting. Wear it. Then, as shown by arrows in FIG.
1 is inserted into the beam connecting plate portion 81 of the beam connecting device 8, and the stopper a of the floor beam 5 is dropped into the notch 81a of the beam connecting plate portion 81 of the beam connecting device 8 and temporarily fixed to the through column 2A. next,
By inserting the pin a1 shown in the figure into the remaining insertion hole 53 of the floor beam 5 and the stopper hole 81c of the beam connecting plate portion 81, the end of the floor beam 5 is attached to the through column 2A.

[0027]

As described above, according to the narrow land construction method of the first aspect of the present invention, the temporary brace is attached to the outer wall and the base with the attachment dedicated to the brace, so that the reaction force body is formed. Since a reaction force body having a structure can be formed, the outer wall body can be moved in a stable state, work safety can be achieved, and the outer wall body is not damaged.

According to the narrow land construction method according to the second aspect of the present invention, the clamp is attached to the fixture body fixed to the pillar to form the upper bracket dedicated to the brace. And the reliability of the joint at the strength is enhanced.

According to the narrow land construction method according to the third aspect of the present invention, the clamp is attached to the fixture main body fixed to the base to form the lower fixture dedicated to the brace, so that the temporary brace can be easily attached and detached, and the workability is improved. improves.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one step of a narrow land construction method showing an embodiment of the present invention.

FIG. 2 is a perspective view showing one step of the method.

FIG. 3 is a front view showing one step of the method.

FIG. 4 is a front view showing one step of the method.

FIG. 5 is a front view showing one step of the method.

FIG. 6 is a front view showing one step of the method.

FIG. 7 is a front view showing a moving operation of the outer wall body by the same method.

FIG. 8 is a front view showing a moving operation of the outer wall body by the same method.

FIG. 9 is a front view showing an elevating operation of the outer wall body by the same method.

FIG. 10 is a perspective view showing an operation of connecting a floor beam to a through pillar.

FIG. 11 is a perspective view showing one step of the method.

FIG. 12 is a perspective view showing a temporary fixing structure of a bogie used in the method.

FIG. 13 is a front view showing a stay beam used in the method.

FIG. 14 is a perspective view of a stay beam connector used in the method.

FIG. 15 is a perspective view of a beam connector used in the method.

FIG. 16 is a front view showing a brace-specific upper fitting used in the method.

FIG. 17 is a plan view of the upper attachment dedicated to the brace.

FIG. 18 is a perspective view showing a use state of the brace-specific upper attachment.

FIG. 19 is a front view showing a brace-specific lower fitting used in the method.

FIG. 20 is a plan view of the lower attachment dedicated to the brace.

FIG. 21 is a perspective view showing a use state of the brace-dedicated lower attachment.

[Explanation of symbols]

 A Narrow land B Neighborhood boundary line 1 Foundation 2 Exterior wall 3 Stay beam 4 Temporary brace 11 Brace dedicated upper fitting 11b Brace dedicated upper fitting clamp 12 Brace dedicated lower fitting 12d Brace dedicated lower fitting clamp

Claims (3)

[Claims] 1. A base is fixed to a foundation provided on a narrow land sandwiched between left and right adjacent land boundary lines, and left and right of the building are located on a base which is recessed inward from a foundation located on the left and right adjacent land boundary lines. A pair of outer walls are assembled, an extendable stay is interposed between the outer walls, one of the outer walls is supported by a temporary brace to form a reaction force body, and the other outer wall is formed by extension of the stay. In a narrow-land construction method in which the body is moved onto the foundation on the border line of the adjacent land, an upper bracket dedicated to the brace is provided on the outer wall, and a lower bracket dedicated to the brace is provided on the base, and the upper and lower ends of the temporary brace A narrow ground construction method characterized by detachably attaching a brace to an upper bracket and a lower bracket to form a reaction body. 2. The method according to claim 1, wherein a clamp is attached to a fixture main body fixed to the pillar to form the upper bracket dedicated to the brace. 3. The method according to claim 1, wherein a clamp is attached to a fixture main body fixed to a base to form the lower attachment dedicated to the brace.