JPH1162071A - Construction method using concrete-placing form as finishing member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain shock-absorbing effect between a finishing member and post-placed concrete, prevent transmission of strain of the post-placed concrete to the finishing member, and maintain high binding performance with the post- placed concrete for preventing interfacial peeling. SOLUTION: A fuzzed cloth 18 is preliminarily bound to one surface of a brick wall 10, and post-placed concrete 12 is placed. The fuzzed cloth 18 provided between the placed concrete and the brick wall 10 performs shock- absorbing action, and transmission of stress strain of the concrete 12 to the brick wall 10 is prevented. Fuzzed yarn parts protruded from one surface side of the fuzzed cloth 18 are embedded in the post-placed concrete 12 to achieve anchor functions. Fuzzed yarn parts protruded from the other surface side of the fuzzed cloth 18 are embedded inside binding agent, and they are tightly entangled with one surface 10a of the brick wall 10 to function as anchors, thereby the fuzzed cloth 18 and the brick wall 10 are integrally and strongly coupled with each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction method in which a finish member is used as a formwork and concrete is cast inside the formwork.

[0002]

2. Description of the Related Art Conventionally, when constructing or reinforcing a wall body such as a fence or an outer wall, there is a construction method in which a finishing member constituting an outer side is used as a formwork (dam plate) and concrete is cast on site inside the formwork. is there. In this case, as a finishing member, a cement-based driving form having a predetermined pattern or the like formed on the surface is used, and this finishing member is integrated with post-cast concrete.

[0003]

However, in the conventional construction method using a finished member as a concrete casting formwork, the finished member and the post-cast concrete are integrated, so that the poured concrete is hardened. The resulting stress strain acts on the finished member, which may cause cracks in the finished member.

[0004] Therefore, it is necessary to reduce the transmission of stress and strain of concrete to the finished member by treating the back surface of the finished member with an adhesive having a buffering function such as a flexible epoxy resin or urethane resin. It is conceivable that these epoxy resins and urethane resins harden over time and lose their elasticity. Then, there is a problem that the integration with the concrete is reduced and a peeling phenomenon occurs between the concrete member and the finished member, and a water path may be formed at the interface.

SUMMARY OF THE INVENTION In view of the above-mentioned conventional problems, the present invention maintains the buffering action between the finishing member and the post-cast concrete, prevents the stress and strain of the post-cast concrete from being transmitted to the finishing member, and It is another object of the present invention to provide a construction method in which a finishing member is a concrete casting formwork which can maintain high binding property with post-cast concrete and prevent interface delamination.

[0006]

According to the present invention, there is provided a construction method in which a finishing member is installed as a formwork and a post-cast concrete is cast inside the finishing member. At the back of the above-mentioned finished member, a napping cloth in which a napping thread portion projects from one side or both sides from a ground thread portion is bonded so that at least a side where the napping thread portion projects is placed on a side where concrete is cast. Then, concrete is cast inside the finishing member with the napped fabric attached.

[0007] As described above, in the construction method in which the finishing member according to the present invention is used as the concrete casting formwork, the napping yarn portion is protruded from the ground yarn portion on one side or both sides by using the napping cloth.
Since the upholstery fabric is bonded to the inner surface of the finishing member, the upholstery fabric is interposed between the finishing member and the post-cast concrete to perform a buffering action, and the stress strain of the concrete is applied to the finishing member. It can be prevented from being transmitted. Further, in the above-mentioned napping fabric, at least the side where the napping yarn portion protrudes is arranged inside the concrete being cast, so that the napping yarn portion is buried in the post-cast concrete to exhibit an anchoring function and provide a high bond with concrete. In order to maintain the adhesiveness, it is possible to prevent the concrete and the finishing member from peeling off.

Incidentally, since the above-mentioned raised fabric itself has a buffering action and can have a high binding property to post-cast concrete, the adhesive member for attaching the raised fabric to a finishing member needs a buffering action. It is sufficient to simply attach to the finishing member with a high adhesive force without causing peeling between the napped fabric and the finishing member. In addition, when the nap portion protrudes on both sides of the nap fabric, the nap portion disposed on the finishing member side is entangled with the back surface of the finishing member to exhibit an anchoring function. The binding property can be further improved.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. 1 and 2 show an embodiment of a construction method in which a finishing member according to the present invention is used as a concrete casting form, and FIG. 1 is a cross-sectional view showing a state where concrete is cast using the finishing member as a form. 1 is a schematic configuration diagram of a napped fabric used in the present embodiment.

The construction method in which the finishing member of this embodiment shown in FIG. 1 is used as a concrete casting formwork will be described taking an example in the case where an existing brick wall 10 is used as the finishing member.
The existing brick wall 10 is an existing wall body, and has a structure in which one side (rear surface) 10a of the brick wall 10 is reinforced by post-cast concrete 12.

The existing brick wall 10 has bricks 16 joined by a mortar 14 laminated with a predetermined thickness t. Before the concrete 12 is cast, a raised fabric 18 is placed on one side 10 a of the brick wall 10. Glue. As shown in FIG. 2, the nap cloth 18 is configured as a knit or a woven fabric, and has a ground yarn portion 18c knitted from a warp yarn 18a and a weft yarn 18b, and a loop-shaped vertical yarn projecting from both sides from the ground yarn portion 18c. It is composed of yarn portions 18d and 18e. still,
These loop-like standing hair portions 18d and 18e may be separated by cutting the ends thereof.

The raised fabric 18 is, for example, a ground yarn portion 18.
The polyester knitted fabric is knitted in a double knitted fabric using polyester multifilaments as the warp 18a and the weft 18b, and polypropylene monofilament as the napping yarn portions 18d and 18e. The napping yarns connecting the front and rear fabrics are cut. Have been. In addition, the raised yarn portions 18d and 18e are desirably 300 denier, the lower limit may be 50 denier or more, and the length may be 2 mm or more, preferably 3 to 8 mm. In addition, the above-mentioned standing fabric 1
8 is a polyester in which the ground thread portion 18c is made of polyester,
Although d and 18e are made of polypropylene, they are not limited to polypropylene, but may be knitted with fibers such as vinylon, acrylic, nylon, aramid, glass, or a material containing these fibers.

When the above-mentioned raised fabric 18 is adhered to the brick wall 10, it is adhered so as to be pressed against the adhesive applied to one side 10a of the brick wall 10. Thus, the standing fabric 18
Is adhered, so that the napped thread portion 18e on the other side protrudes from one side 10a of the brick wall 10.

Next, on the one side 10a side of the brick wall 10, a mold 20 is erected at a predetermined interval S for placing the concrete 12, and the mold 20 and the brick wall 1 are placed.
The separator 22 is attached between the two. When attaching the separator 22 to the brick wall 10, it is desirable to drive the separator 22 into the joint between the stacked bricks 14. Then, concrete 12 is poured between the brick wall 10 and the formwork 20 from above, and after the concrete 12 is cured for a predetermined time for curing, the formwork 20 is removed.

Therefore, in this embodiment, the concrete 12 is placed on one side 10a of the existing brick wall 10 as a finishing member.
And when trying to reinforce this brick wall 10,
The raised fabric 18 is bonded to one surface 10a of the brick wall 10 by using a raised fabric 18 in which the raised yarn portions 18d and 18e project from both sides from the ground yarn portion 18c. For this reason, when the concrete 12 is cast on the one surface 10a side of the brick wall 10, the raised fabric 18 is interposed between the concrete 12 and the brick wall 10, and the raised fabric 18 is Ground yarn 1 forming a net layer
8c performs a buffering action, so that it is possible to prevent the stress strain accompanying shrinkage when the concrete 12 is dried from being transmitted to the brick wall 10. For this reason, the brick wall 10
Cracks can be prevented from occurring, and the inconvenience of rainwater entering from the cracks can be prevented.

The napping fabric 18 has napping yarn portions 18d and 18e projecting from both sides thereof, and the napping yarn portion 18
When d is bonded to one surface 10a of the brick wall 10 via an adhesive, the raised thread portion 18e protruding from one surface of the raised fabric 18 is embedded in the adhesive and the brick wall 10
Functioning as an anchor entangled with one side 10a of the
The raised fabric 18 and the brick wall 10 are integrally and firmly connected.

When the post-cast concrete 12 is cast on one side 10a of the brick wall 10, the raised thread 18d projecting from the other face of the raised fabric 18 adhered to the brick wall 10 becomes It is buried inside and exhibits an anchor function. For this reason, it is possible to maintain a high binding property between the upright fabric 18 fixed to the brick wall 10 and the concrete 12, and to prevent the concrete 12 and the brick wall 10 from being peeled off. it can.

By the way, in this embodiment, the above-mentioned napkin cloth 1
8 discloses a case in which the raised yarn portions 18d and 18e are projected from both sides, but the invention is not limited thereto, and the raised hair fabric 18 in which the raised yarn portions are projected only to the casting side of the concrete 12 may be used. That is, since the raised fabric 18 has a buffering action at the ground yarn portion 18c as described above, it is not necessary to determine the buffering action from the adhesive, so the adhesive for attaching the raised fabric 18 to the brick wall 10 is The napped fabric 18 can be firmly adhered to the brick wall 10 using this adhesive as long as it has a property having a high adhesive strength without a buffer function.

In this embodiment, the concrete 1
In placing the concrete 2, the opposite side of the brick wall 10 was dammed with the formwork 20 across the space for placing the concrete 12, but instead of the formwork 20, the same finishing member as the brick wall 10 was used. The concrete 12
Can be brick walls on both sides. Even in this case, the napped fabric is similarly bonded to the brick wall to be built in place of the formwork 20.

FIG. 3 is a cross-sectional view corresponding to FIG. 1 showing another embodiment, and the same components as those in the above-described embodiment are denoted by the same reference numerals, and redundant description will be omitted. That is, this embodiment shows a case where a new wall body is constructed by using a cement-based pseudo rock driving panel 30 as a finishing member.

The artificial rock driving panel 30 is formed by precasting ready-mixed concrete on a predetermined formwork at a factory or the like, and a rock pattern is formed on the surface thereof. The artificial rock driving panel 30 is disposed along the surface of the wall to be constructed with a gap serving as a joint between adjacent pseudo rock driving panels 30 provided. At this time, the separator 32 is driven into the back surface 30a of the artificial rock driving panel 30, and the pseudo rock driving panel 30 is temporarily fixed by fixing the separator 32 to the main reinforcement 34.

The above-mentioned artificial rock driving panel 30 is pressed against the upper surface (corresponding to the back surface 30a) of the ready-mixed concrete poured into the formwork at the time of precasting the same, and the raised yarn protruding from one side thereof. The portion 18e is embedded in ready-mixed concrete. Therefore, the artificial rock driving panel 30 is hardened in a state where the raised thread portion 18e is buried, and the raised thread portion 18e serves as an anchor, and the raised fabric 18 is firmly fixed to the artificial rock driving panel 30. For this reason, in this embodiment, similarly to the above-described embodiment, the napped thread portion 18d on the other surface side of the napped fabric 18 protrudes from the back surface 30a of the artificial rock driving panel 30.

The concrete 12 is cast on the back surface 30a side of the artificial rock driving panel 30 set via the separator 32, so that the concrete 12 is provided with the upright fabric 18 in the same manner as in the above embodiment. The yarn part 18d acts as an anchor and exhibits a high binding force,
It is possible to prevent the concrete 12 and the artificial rock driving panel 30 from being separated. After the concrete 12 is cast, mortar is filled in the gaps between the artificial rock driving panels 30 to form joints.

Therefore, in this embodiment, similarly to the above-described embodiment, when the post-cast concrete 12 is hardened, the raised fabric 18 performs a buffering action and the concrete 1
2 prevents the stress strain from being transmitted to the brick wall 10,
Cracks can be prevented from being generated in the artificial rock driving panel 30. Also in this embodiment, the artificial rock driving panel 3 is sandwiched between the concrete 12 placing spaces.
The opposite side of the 0 is of course dammed with a formwork or similar artificial rock driven panel.

FIG. 4 is a cross-sectional view corresponding to FIG. 1 showing another embodiment, and the same components as those in the above-described embodiment are denoted by the same reference numerals, and redundant description will be omitted. That is, in this embodiment, a case is shown in which a stone driving form 40 is used as a finishing member, and a new wall is constructed in the same manner as in the above embodiment.

The stone material driving form 40 is formed by processing natural stone into a thick plate-like predetermined shape, and the back surface 40a is formed substantially flat, and the separator 42 is driven into the back surface 40a. Then, the separator 42 is connected to the main reinforcement 44.
While being fixed to each other, a gap serving as a joint is provided between the respective stone material driving forms 40 along the surface of the wall surface to be constructed.

The napping fabric 18 is adhered to the back surface 40a of the masonry driving form 40. The napping fabric 18 is formed from both sides shown in FIG. Even if 18d and 18e protrude,
Further, the raised thread portion 18e may be projected only on the side where the concrete 12 is cast. Then, the napped fabric 18 is firmly adhered to the back surface 40a via an adhesive such that the napped yarn portion 18d projects at least to the side where the concrete 12 is cast.

Therefore, even in this embodiment, the upholstery fabric 1 is provided on the back surface 40a of the stone material form 40 serving as a finishing member.
8 and the raised thread portion 18d is projected, so that when the post-cast concrete 12 is cast, the raised fabric 18 performs a buffering action, and the stress strain of the concrete 12 is reduced by the stone driving form 40. Of the concrete 12 and the stone material form 40 can be prevented from being peeled off. still,
In this embodiment as well, it is a matter of course that the opposite side of the stone material driving formwork 40 across the space for placing the concrete 12 is blocked by a formwork or similar stone material driving panel.

In each of the above embodiments, the existing brick wall 10, the artificial rock driving panel 30 and the stone driving form 4
Although the case of finishing using 0 has been disclosed, it goes without saying that other finishing members may be used without being limited to this.

[0030]

As described above, in the construction method in which the finished member of the present invention is used as a concrete casting formwork, a raised fabric in which a raised yarn portion protrudes from one side or both surfaces from a ground yarn portion is used. Since the raised fabric is adhered to the inner surface of the finishing member, the raised fabric can be interposed between the finishing member and the post-cast concrete to perform a buffering action. Therefore, it is possible to prevent the stress strain of the concrete from being transmitted to the finishing member due to the buffering action of the upholstery fabric, so that it is possible to prevent cracks from being generated in the finishing member and to prevent rainwater from entering. .

In addition, since the above-mentioned napping cloth is arranged at least on the side where the napping portion protrudes inside the concrete, the napping portion is buried in the post-cast concrete to exhibit an anchoring function and to form the concrete. In order to maintain the high binding property of the concrete, it is possible to prevent the concrete and the finishing member from being separated from each other, and to prevent formation of a water path at the interface.

Further, as described above, the upholstery fabric itself has a buffering action and can improve the binding property to the post-cast concrete. Therefore, the adhesive member for attaching the upright fabric to the finishing member has a buffering action. It is only necessary to attach to the finishing member with high adhesive force without the need for
Peeling between the napped fabric and the finishing member can be reliably prevented. In addition, when the nap portion protrudes on both sides of the nap fabric, the nap portion disposed on the finishing member side is entangled with the back surface of the finishing member to exhibit an anchoring function. There are various excellent effects that the binding property can be further improved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a state in which concrete is cast using a finishing member as a mold according to an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of a napped fabric used in one embodiment of the present invention.

FIG. 3 is a cross-sectional view corresponding to FIG. 1, showing another embodiment of the present invention.

FIG. 4 is a cross-sectional view corresponding to FIG. 1, showing still another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Brick wall (finished member) 10a One side (back surface) 12 Back-cast concrete 18 Upholstery fabric 18c Ground thread portion 18d, 18e Upholstered thread portion 30 Pseudo rock driving panel (finishing member) 30a Back surface 40 Stone material formwork (finishing member) 40a Back surface

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Haruka Ogawa 4-640 Shimoseito, Kiyose-shi, Tokyo Co., Ltd. Inside the Obayashi Corporation Technical Research Institute (72) Inventor Jun Nakane 4-640 Shimoseito, Kiyose-shi, Tokyo Co., Ltd. Obayashi Gumi Co., Ltd. Inside the research institute (72) Yoshimasa Hayashi 4-640 Shimoseito, Kiyose-shi, Tokyo Inside the Obayashi Corporation Technical Research Institute Co., Ltd. (72) Masao Kawahara 1-10-4 Minamidai, Kawagoe-shi, Saitama Japan Shock Beton Jiapan Co., Ltd.

Claims (1)

[Claims] 1. A construction method in which a finishing member is installed as a formwork, and a post-cast concrete is cast inside the finishing member. Alternatively, a raised fabric protruding from both sides is adhered such that at least the side where the raised yarn portion protrudes is arranged on the side where the concrete is cast, and concrete is applied to the inside of the finishing member with the raised fabric attached. A construction method using a finishing member as a concrete casting formwork.