JPH09279728A - Construction method of outer wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure a clearance and improve skeleton precision by building a half PC panel between existing outer walls as a facing material, fixing the upper part of the PC panel by a head connecting hardware, and placing after- placing concrete in the inside of the PC panel. SOLUTION: One raised part of an upward U-shaped bent hardware 10 on the upper part of a half PC panel 4 is fixed to an existing outer wall 2 by an anchor bolt 9. A downward U-shaped bent hardware 11 is mounted on the raised part on the upper part of a PC panel 6. A lengthy bolt 13 is inserted through a cap nut mounted on the downward bent hardware 11 and the other raised part of the upward bent hardware 10. The insert length of the bolt 13 is regulated between the exiting outer wall 2 and the PC panel 6 to ensure a clearance 3, and the lengthy bolt 13 is then fixed to the other raised part of the upward bent hardware 10. Vertical and horizontal reinforcements 17 are arranged on the protruding side of the truss main bar 5 on the inside of the half PC panel 4 to assemble a form 18, and after-placing concrete is placed therein. Further, after solidification, the form 18 is released, and an outer wall by the composed wall is constructed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing an outer wall of a building.

[0002]

2. Description of the Related Art In the case of constructing an outer wall 1 of a building, for example, when a second-stage construction is carried out following a first-stage construction, the construction is completed between the existing outer wall 2 already constructed in the first-stage construction as shown in FIG. In order to prevent the outer walls from contacting each other as shown in Fig. 3, it is necessary to secure a predetermined clearance 3 of 160 mm for the expansion joint (EXP.J).

When it is necessary to secure a predetermined clearance 3 for the expansion joint (EXP.J), the mold facing the existing outer wall 2 is conventionally made of Styrofoam or the like and has a clearance dimension of thickness. It is made into one and assembled in a state of contacting the existing outer wall 2, and the part of the formwork made of Styrofoam etc. is concrete-cast, solidified and then melted with gasoline etc. The clearance 3 was secured between the outer wall 1 and the outer wall 1.

[0004]

[Problems to be Solved by the Invention] In the case of attempting to construct the outer wall of the second construction by securing a predetermined clearance with the outer wall of the existing building whose construction is completed in the first construction,
If you are already living in the first-stage construction building, it is difficult to apply the formwork method that uses styrofoam, etc. from the viewpoint of ensuring the safety of residents.

The present invention eliminates the inconveniences of the above-mentioned conventional example, and for example, even if the user is already living in the building on the first-stage construction side in the second-stage construction following the first-stage construction, the outer wall to be newly constructed and the existing outer wall It is an object of the present invention to provide an outer wall construction method capable of easily and safely securing a predetermined clearance between the outer wall and the outer wall, effective for an outer wall that can be constructed only from one side, and capable of constructing a composite wall having excellent proof stress.

[0006]

In order to achieve the above-mentioned object, the present invention uses a half-PC board having a part of truss reinforcement embedded therein as an outer wall material with a predetermined space between the outer walls of an existing building. The board side is located on the existing outer wall side and built, the upper part of the PC board is fixed to the existing outer wall with a head tie metal, and the post-cast concrete is placed inside the half PC board to construct a composite wall, And the head tie hardware is an upward U-shaped bent hardware fixed to the existing outer wall with anchor bolts,
Consists of a downward U-shaped bending metal fitting attached to the upper part of the half PC board, a cap nut attached to the upper part of the downward bending metal fitting, and a bolt connecting the cap nut and the upward U-shaped bending metal fitting. The main point is to do.

According to the first aspect of the present invention, the half-PC board is built by locating the PC board on the side of the outer wall of the existing building, and the PC board serves as the outer surface of the outer wall. No need to assemble a formwork with
A predetermined clearance of 160 mm for the joint (EXP.J) can be easily secured between the existing outer wall.

[0008] Further, by placing a post-cast concrete on the inside of the half PC plate to form a composite wall, it is possible to obtain a proof stress and improve the skeleton accuracy.

According to the second aspect of the present invention, in addition to the above-mentioned action, the half PC plate has its upper portion fixed to the existing outer wall by the head tie metal, so that the post-cast concrete can be poured in a stable state.

The head tie metal is attached to the existing outer wall with an anchor bolt and has an upward U-shaped bending metal fitting, a downward U-shaped bending metal fitting attached to the upper part of the half PC board, and an upper portion of the downward bending metal fitting. Since it is composed of the attached cap nut and the bolt connecting the cap nut and the upward U-shaped bent metal fitting, it can be easily fixed, and the interval for securing a predetermined clearance can be easily adjusted. Later removal is also easy.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a vertical cross-sectional side view showing an embodiment of a construction method for an outer wall of the present invention. In the construction method of the present invention, for example, a predetermined clearance 3 is secured between an existing outer wall 2 already constructed in the first construction phase. Outer wall 1 newly constructed in the second phase
It is applied when constructing.

Reference numeral 4 in the drawing denotes a half PC board which constitutes the outer side surface of the outer wall 1. This is a PC board in which a plurality of truss bars 5 are arranged at appropriate intervals with the truss bars 5 as shown in FIG. It is the one in which the lower half of 6 is embedded.

When the PC board 6 is built as the outer wall 1, the one located at the lower part of the first floor is formed flat, but the outer wall 1 of the second floor and above is constructed in order upward. When assembled, the upper and lower joints are
Was formed to form a stepped portion.

FIG. 2 shows a head tie metal 8 for fixing the upper part of the half PC board 4 to the existing outer wall 2 when the half PC board 4 is built as the outer wall 1. The head tie metal 8 is attached to the existing outer wall 2 by an anchor bolt 9. Fixed upward U-shaped bent hardware 10
A downward bent U-shaped bending metal fitting 11 attached to the upper part of the half PC board 4, a cap nut 12 mounted on the downward bending metal fitting 11, the cap nut 12 and the upward U-shaped bending metal fitting 10. Consists of a long bolt 13 for connecting and

Next, a method of constructing the outer wall 1 with a synthetic wall using the half PC board 4 will be described. The half PC board 4 is placed between the existing outer wall 2 and the PC board 6 side outside (16
Secure a clearance of 0 mm) and build it. At this time, as shown in FIG.
Secure the outside to the floor on the first floor.

On the upper part of the half PC board, the PC board 6 is fixed to the existing outer wall 2 by a head tie hardware 8. The fixing method is to fix one rising part of the upward U-shaped bending metal fitting 10 to the existing outer wall 2 with the anchor bolt 9 and cover the rising part 7 at the upper part of the PC board 6 with the downward U-shaped bending metal fitting 11. To install.

Next, a long bolt 13 is inserted through the cap nut 12 attached to the downward U-shaped bending metal fitting 11 and the other rising portion of the upward U-shaped bending metal fitting 10, and the existing outer wall 2 is inserted.
After adjusting the insertion length of the long bolt 13 so that a predetermined clearance 3 is secured between the PC plate 6 and the PC plate 6, the nut 15
Then, the long bolt 13 is fixed to the other rising portion of the upward U-shaped bending hardware 10 with the washer 16.

As a result, the PC board 6 is built in with the predetermined clearance 3 secured between it and the existing outer wall 2.

Then, vertical and horizontal reinforcements 17 and the like are further arranged on the side where the truss main reinforcements 5 project inside the half PC board 4, a formwork 18 is assembled, and post-cast concrete is placed in the formwork 18. Then, after the post-cast concrete is solidified, the mold 18 is removed from the mold, and the post-cast concrete and the half PC board 4 form the outer wall 1 made of a composite wall. In this case, since the demolding may be performed only on the inner part of the outer wall 1, the existing outer wall 1
There is no problem if there is only a gap of about 160 mm between and.

As shown in FIG. 4, the rising portions 7 of the PC plates 6 of the half PC plate 4 are meshed with each other and fixedly connected to each other on the second floor and above of the building. In this case, as shown in FIG. 3, by attaching the Esaform 19 to the upper surface of the rising portion 7, when the post-cast concrete is placed,
It is possible to prevent concrete from leaking out from the interlocking portions of the rising portions 7.

[0021]

As described above, the construction method of the outer wall of the present invention is to construct a new outer wall even if the building on the side of the first construction is already living in the second construction following the first construction. Since it is not necessary to assemble a formwork between the outer wall and the existing outer wall, and only half PC boards need to be built at a predetermined interval, the predetermined clearance can be easily and safely secured, and the outer wall can be installed only from one side. It is also effective for the above, and since the outer wall can be constructed by synthesizing the half-PC board and the post-cast concrete, the proof strength is also excellent and the skeleton accuracy can be improved.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing an embodiment of a construction method for an outer wall of the present invention.

FIG. 2 is a side view of the head tie metal used in the outer wall construction method of the present invention.

FIG. 3 is a side view of the upper portion showing the embodiment of the construction method for the outer wall of the present invention.

FIG. 4 is a vertical cross-sectional side view of a method of fixing a half PC board by a construction method of an outer wall of the present invention.

FIG. 5: Half PC used in the construction method of the outer wall of the present invention
It is a perspective view of a board.

FIG. 6 is a half PC used in the construction method of the outer wall of the present invention
It is a perspective view of the truss muscle arrange | positioned to a board.

FIG. 7 is a vertical sectional side view of an outer wall constructed with a predetermined clearance secured.

[Explanation of symbols]

1 ... Outer wall 2 ... Existing outer wall 3 ... Clearance 4 ... Half PC plate 5 ... Truss muscle 6 ... PC plate 7 ... Rising part 8 ... Head connecting hardware 9 ... Anchor bolt 10 ... Upward U-shaped bending hardware 11 ... Downward U B-shaped bent hardware 12… Bag nut 13… Long bolt 14… Angle material 15… Nut 16… Washer 17… Vertical / horizontal streak 18… Form 19… Esaform

Claims (2)

[Claims] 1. A half PC in which a part of truss muscle is embedded.
With the board as the outer wall material, with a predetermined gap between the outer walls of the existing building, the PC board side is positioned on the existing outer wall side and built in.
Fix the upper part of the PC board to the existing outer wall with a head tie hardware,
A construction method for outer walls, in which post-cast concrete is placed inside the half-PC board to construct a composite wall. 2. The head tie hardware is an upward U-shaped bent hardware fixed to an existing outer wall with anchor bolts, and a half PC.
A downward bending U-shaped metal fitting attached to the upper part of the plate, a cap nut attached to the upper portion of the downward bending metal fitting, and a bolt connecting the cap nut and the upward U-shaped bending metal fitting. Item 1. A construction method for an outer wall according to item 1.