JP3120143B2 - Exterior wall construction method - Google Patents

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 external wall 1 of a building, for example, when performing a second-phase construction following a first-phase construction, there is a gap between the existing outer wall 2 which has already been completed in the first-phase construction as shown in FIG. As shown in (1), it is necessary to secure a predetermined clearance 3 of 160 mm for the expansion joint (EXP.J) in order to prevent contact between the outer walls.

[0003] When it is necessary to secure a predetermined clearance 3 for an expansion joint (EXP.J) as described above, conventionally, the formwork facing the existing outer wall 2 side is made of a styrofoam or the like with a thickness of the clearance dimension. It is made into a product and assembled in a state where it abuts on the existing outer wall 2, and the part of the formwork with this styrofoam etc. is cast and solidified, then melted with gasoline etc. and demolded, thereby newly building with the existing outer wall 2 The clearance 3 is secured between the outer wall 1 and the outer wall 1.

[0004]

When a predetermined clearance is secured between the first building and the outer wall of an existing building which has been completed in the first construction, the outer wall of the second construction is to be constructed.
When already occupying a building for the first phase of construction, it is difficult to apply a formwork method using styrofoam or the like from the viewpoint of ensuring the safety of residents.

The present invention solves the inconvenience of the conventional example. For example, even if the second-stage construction following the first-stage construction is already occupied in the building on the first-stage construction side, the outer wall to be newly constructed and the existing outer wall are constructed. It is an object of the present invention to provide a method of constructing an outer wall which can easily and safely secure a predetermined clearance between the outer wall and the outer wall which can be constructed only from one side, and which can construct a composite wall having excellent proof strength.

[0006]

According to the present invention, in order to achieve the above object, a half-PC board in which a part of a truss is embedded is used as an outer wall material, and a PC is provided at a predetermined interval between outer walls of an existing building. Laying the board side on the existing outer wall side, mounting the upper part of the PC board to the existing outer wall with a head tie, and casting a post-cast concrete inside the half PC board to construct a composite wall; And, the head connection hardware is an upward U-shaped bent hardware fixed to the existing outer wall with anchor bolts,
Consisting of a downward U-shaped bent metal fitting attached to the upper part of the half PC board, a long nut mounted on the upper part of the downward bent metal fitting, and a bolt for connecting the long nut and the upward U-shaped bent metal fitting. The gist is to do.

According to the first aspect of the present invention, a half PC board is built by placing a PC board on the side of an outer wall of an existing building, and this PC board is used as an outer side surface of the outer wall, whereby the existing outer wall is formed. There is no need to form a formwork between
A predetermined clearance dimension for the joint (EXP.J) of 160 mm can be easily secured between the joint and the existing outer wall.

[0008] In addition, by forming a post-cast concrete on the inside of the half PC board to form a composite wall, a proof stress can be obtained, and the accuracy of the skeleton can be improved.

According to the second aspect of the present invention, in addition to the above operation, the upper portion of the half PC board is fixed to the existing outer wall with a head tie, so that the post-cast concrete can be cast in a stable state.

[0010] The head connecting hardware is provided with an upward U-shaped bent metal fixed to the existing outer wall with anchor bolts, a downward U-shaped bent metal mounted on the upper part of the half PC board, and an upper part of the downward bent metal. Since it is composed of the attached long nut and bolts for connecting the long nut and the upward U-shaped bent metal part, it can be easily fixed, the clearance can be easily adjusted for securing a predetermined clearance, and post-cast concrete casting is performed. 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 longitudinal sectional side view showing an embodiment of an outer wall construction method according to the present invention. The method according to the present invention secures a predetermined clearance 3 with an existing outer wall 2 already constructed, for example, in the first stage construction. Exterior wall 1 newly in the second phase construction
It is applied when constructing.

In the figure, reference numeral 4 denotes a half PC board constituting the outer side surface of the outer wall 1, which is composed mainly of truss bars 5 as shown in FIG. The lower half of Fig. 6 is embedded.

When the end portion of the PC board 6 is installed as the outer wall 1, the one located at the lower part of the first floor is formed flat, but it is sequentially built upward as constituting the outer wall 1 on the second floor or more. When inserted, the upper and lower joints are
Was formed on the stepped portion.

FIG. 2 shows a head connecting piece 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, and the head connecting piece 8 is fixed to the existing outer wall 2 by an anchor bolt 9. Fixed upward U-shaped bending hardware 10
A downward bent metal fitting 11 attached to the upper part of the half PC board 4, a long nut 12 mounted on the upper part of the downward bent metal 11, the long nut 12 and the upward bent metal fitting 10 And a long bolt 13 that couples them.

Next, a method of constructing the outer wall 1 with a composite wall using the half PC board 4 will be described. The half PC board 4 is positioned between the PC board 6 and the existing outer wall 2 with the side of the PC board 6 outside (16).
0mm) clearance 3 is secured and built. At this time, as shown in FIG.
Fix the outside to the first floor.

At the upper part of the half PC board 4, the PC board 6 is fixed to the existing outer wall 2 with a head connecting hardware 8. The fixing method is such that one of the rising portions of the upwardly bent U-shaped bent hardware 10 is fixed to the existing outer wall 2 with the anchor bolts 9, and the downwardly bent U-shaped bent hardware 11 is placed on the rising portion 7 on the upper part of the PC board 6. And attach it.

Next, a long bolt 13 is inserted into the long nut 12 attached to the downwardly bent U-shaped bent hardware 11 and the other rising portion of the upwardly bent U-shaped bent hardware 10. In this inserted state, as shown in FIG. 2, the nut 15 and the washer 16 are separated from the other rising portion of the U-shaped bent hardware 10, and the nut 15 and the washer 16 are internally extended from the other rising portion of the U-shaped bent hardware 10. The measuring bolt 13 enters, and a washer 16a is provided at the tip. After building the PC board 6,
The nut 15 and the washers 16 and 16a are temporarily tightened so that the other rising portion of the U-shaped bent metal fitting 10 is positioned at the end of the long bolt 13 and a predetermined clearance is provided between the existing outer wall 2 and the PC board 6. Long nut 13 long nut so that 3 is secured
After adjusting the insertion position to 12, insert nut 15 and washer 1
The long bolt 13 is bent upward with a U-shaped bent hardware 10 at 6 and 16a.
Is fixed to the other rising portion.

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

On the side of the half PC board 4 on which the main truss bars 5 protrude, vertical and horizontal bars 17 and the like are further arranged, a formwork 18 is assembled, and post-cast concrete is poured into the formwork 18. Then, after the post-cast concrete is solidified, if the formwork 18 is removed, the post-cast concrete and the half PC board 4 form the outer wall 1 of a composite wall. In this case, the mold needs to be removed only from the inner portion of the outer wall 1.
There is no problem if there is only a gap of about 160 mm between them.

As shown in FIG. 4, the raised portions 7 of the PC board 6 of the half PC board 4 are fixedly engaged with each other on the second and higher floors of the building. In this case, as shown in FIG. 3, by attaching the feed foam 19 to the upper surface of the rising portion 7, when the post-cast concrete is poured,
It is possible to prevent concrete from leaking out of the mutually engaged portions of the rising portions 7.

[0021]

As described above, the construction method of the outer wall according to the present invention intends to newly construct an external wall even if, for example, the second-phase construction following the first-phase construction is already occupied in the building on the first-phase construction side. There is no need to form a formwork between the outer wall and the existing outer wall, and only half-PC boards need to be built at predetermined intervals, so that a predetermined clearance can be secured easily and safely, and construction can be performed only from one side. It is effective for the outer wall, and furthermore, the outer wall can be constructed by combining the half PC board and the post-cast concrete, so that the strength is excellent and the accuracy of the skeleton can be improved.

[Brief description of the drawings]

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

FIG. 2 is a side view of a head tie used in the method of constructing an outer wall according to the present invention.

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

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

FIG. 5 is a half PC used in the method of constructing an outer wall according to the present invention.
It is a perspective view of a board.

FIG. 6 is a half PC used in the method of constructing an outer wall according to the present invention.
It is a perspective view of the truss reinforcement arranged on a board.

FIG. 7 is a longitudinal sectional side view of an outer wall constructed by securing a predetermined clearance.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Exterior wall 2 ... Existing exterior wall 3 ... Clearance 4 ... Half PC board 5 ... Truss bar 6 ... PC board 7 ... Standing part 8 ... Head connection hardware 9 ... Anchor bolt 10 ... Upside-down U-shaped bending metal 11 ... Downside Figure-shaped bending hardware 12 ... Long nut 13 ... Long bolt 14 ... Angle material 15 ... Nut 16,16a ... Washer 17 ... Longitudinal streak 18 ... Form 19 ... Esafoam

Claims (2)

(57) [Claims] 1. A half PC in which a part of a truss bar is embedded.
With the board as the outer wall material, the PC board side is located on the existing outer wall side with a predetermined interval between the outer walls of the existing building, and built.
Fix the upper part of the PC board to the existing outer wall with a head tie,
A method of constructing an outer wall, wherein a composite wall is constructed by placing post-cast concrete inside a half PC board. 2. A head connecting hardware is an upward U-shaped bent metal fixed to an existing outer wall with an anchor bolt, and a half PC.
A downwardly bent U-shaped bent fitting attached to an upper portion of a plate, a long nut attached to an upper portion of the downwardly bent bent metal, and a bolt connecting the long nut and the upwardly bent U-shaped bent metal. Item 4. An outer wall construction method according to Item 1.