JPH09273252A - Building integration method of thin wall frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To save labor, improve productivity, shorten construction term, and reduce cost at construction site and thin thickness frame production factory. SOLUTION: It is a method by which concrete is placed by using a thin thickness frame to construct a wall. After a first taper cone 9 in which a nut with a shaft foot bolt which fits in a tapered hole 25 is embedded is screwed in the tapered hole 25 dcilled in the thin wall frame 10 to build them, concrete is placed and hardened. Next, the first taper cone 9 is removed, and a second taper cone 8 in which a nut is embedded in a shaft core is screwed in the tapered hole 25.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for assembling a thin-walled formwork.

[0002]

2. Description of the Related Art Conventionally used plywood veneer formwork methods are highly rational because they can easily follow the shape of a building due to the lightness and workability of wood. However, most of the work is done at the construction site, which makes the work process complicated and inefficient. In particular, lately, the number of man-hours for formwork that requires skill has decreased, the aging has progressed, and the construction period has been delayed.

In addition, most of the veneer form materials are dependent on the forests of the South Sea, resulting in reduction of tropical rain forests and destruction of the natural environment. The biggest problem is the need to generate and dispose of large amounts of formwork scrap at the construction site.
From the above, the rationalization of the plywood formwork method has been called for, and new formwork methods have been studied and are actually used. Among the various new formwork construction methods, the thin-walled formwork method uses thin-walled material as a formwork, and by omitting the formwork dismantling, curing, and finishing steps after placing concrete, labor saving, labor saving, and formwork waste materials at the same time. It is expected to prevent the occurrence of the above, shorten the process, and reduce the cost.

However, in the method currently being developed,
There are many problems in the production process of the thin wall form material. Next, a conventional method of constructing a thin-walled form will be described with reference to the drawings. FIG. 9 shows a method of mounting the thin-walled formwork by the external support method. First, the taper cone 1 in which the separator holding nut is embedded is attached to the separator 11, and the thin mold 1
0 is sandwiched between flaps 13, and the flaps 13 are assembled with a reinforcing round pipe 16 and a round pipe washer 15, and the form tie (registered trademark) 14 and the above-mentioned taper cone 1 are connected to build concrete. After casting and curing, the flank angle 13, round pipe 16, round pipe washer 15 and foam tie 14 are removed. Here, the permanent adhesive strength with the cast-in-place concrete after removing the foam tie 14 becomes a problem, and pebbles are spread on the contact surface with the thin-walled formwork,
Although it has been processed such as making unevenness, it is still not enough, and it is fixed with insert bolts and nuts.

Next, FIG. 10 shows a method of constructing a pillar formwork by an internal support method. First, parts A and B of FIG.
From the detailed view of the parts, the corner portions of the thin-walled mold W and the thin-walled mold X are connected by the L-shaped steel 18. The connection between the thin-walled form W and the L-shaped steel 18 is carried out by inserting a hexagonal bolt 20 projecting from the embedded metal fitting 21 embedded in a predetermined position of the thin-walled form W into the L-shaped steel 18 in a stupid hole. Hex nut 19
It is a method of screwing into. Further, the thin-walled form X and the L-shaped steel 18 are connected to each other by inserting a hexagonal bolt 20 into the fool hole of the L-shaped steel 18 and the thin-walled form X, and sandwiching the washer 12 from the outside of the thin-walled form X to the hexagonal nut 19. It is a method of screwing.

Further, FIG. 11 shows a method of erection of a beam formwork by an external support method. First, from the detailed view of the portion C in FIG. 11, the corner portions of the thin-walled mold Y and the thin-walled mold Z are connected by the L-shaped steel 18. The thin formwork Y and the L-shaped steel 18 are connected to each other by the embedding metal fitting 2 embedded at a predetermined position of the thin formwork Y.
It is a method in which a hexagonal bolt 20 projecting from the inside of No. 1 is protruded from the inside through a stupid hole of an L-shaped steel 18 and screwed into a hexagonal nut 19. Further, the connection between the thin-walled form Z and the L-shaped steel 18 is performed by inserting the separator insert 22 embedded in a predetermined position of the thin-walled form Z from the inside of the built-in separator 24 and the fool holes of the L-shaped steel 18. It is a method of connecting with the foam tie 14 from the outside of the building.

That is, from the description of FIG. 10 and FIG.
When making a thin-walled formwork by the pouring method, it is integrated with cast-in-place concrete D, that is, during construction, during normal use or during an earthquake, it must never be stripped off and at the same time it should not be corroded. It is necessary to embed the metal fittings in advance. However, since the above-mentioned metal fittings are not compatible with each other, various kinds of metal fittings are used. For this reason, it is necessary to manufacture each mold in accordance with the shape of the structure at the factory, and it is inevitable to increase the cost in terms of productivity, cost, and delivery time in the manufacturing of thin-walled molds, which saves labor at the construction site. It has become a situation where the thin-walled formwork production factory has moved to reduce the production period, shorten the construction period, and reduce the cost. Therefore, the total cost does not decrease.

[0008]

Therefore, the present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to standardize a tapered hole and a tapered cone formed in a thin-walled mold. , By combining them, building a mold according to the shape of the structure, and integrating it with cast-in-place concrete, it will save manpower at the construction site and thin-walled form production plant, improve productivity, shorten the construction period and reduce costs. It is intended to provide a method for assembling and integrating a thin-walled formwork capable of achieving the above.

[0009]

[Means for Solving the Problems] That is, according to the first aspect of the present invention, when placing concrete using a thin-walled formwork, the thin-walled formwork is used as it is as a finishing base to be integrated with concrete. In the method for integrating thin-walled molds into a building, there is prepared a cemented taper cone in which a taper hole is bored in the thin-walled mold and a bolt or nut is embedded in the shaft core in a shape to be fitted into the tapered hole. Then, after the concrete is cast using the thin-walled form, the cemented taper cone is screwed into the tapered hole.

A second aspect of the present invention is, when a concrete is cast using a thin-walled formwork to construct a wall, a shaft having a shape fitted into the tapered hole formed in the thin-walled formwork. After screwing in the first tapered cone in which the nut with foot bolt is embedded, concrete is placed and cured,
Then, the first tapered cone is removed, and a second tapered cone having a nut embedded in the shaft core is screwed into the tapered hole.

Further, a third aspect of the present invention is, when a concrete is cast using a thin-walled formwork to construct a floor, a shaft having a shape fitted into the tapered hole bored in the thin-walled formwork. A third taper cone having a bolt embedded in the core is screwed in, and a fourth taper cone having a nut embedded in the shaft core is screwed into the third taper cone.

[0012] Further, in a fourth aspect of the present invention, when concrete is cast using a thin-walled mold to construct a pillar or a beam, a thin-walled mold having a tapered hole and a hole at the same position as the tapered hole are formed. After stacking the L-shaped steel provided and screwing in a fifth tapered cone in which a nut with a shaft foot bolt having a shape that fits in the tapered hole is embedded, concrete is placed and hardened, and then the fifth tapered cone is formed. Is removed, and a sixth taper cone having a nut embedded in the shaft core is screwed into the taper hole.

A fifth aspect of the present invention is, when concrete is cast using a thin-walled mold to construct a pillar or a beam, a thin-walled mold having a tapered hole and a hole at the same position as the tapered hole. The L-shaped steel provided is overlapped, and a seventh taper cone having a bolt embedded in the shaft core shaped to fit in the taper hole is screwed into the eighth taper cone, and a nut is embedded in the shaft core in the seventh taper cone. The taper cone is screwed in.

It is preferable that a nut attached to the long bolt is brought into close contact with the smaller diameter side of the tapered hole formed in the thin-walled mold. Furthermore, the nut attached to the long bolt is
If the thickness of the thin-walled formwork is smaller than the taper cone,
A hat-like shape with a raised central portion is preferable.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION According to the method for building and integrating thin-walled formwork of the present invention, when pouring concrete using the thin-walled formwork, the thin-walled formwork is used as it is as a finishing base to be integrated with concrete. In the method of integrating thin-walled molds, a tapered hole is formed in the thin-walled molds,
Prepare a cemented taper cone in which bolts or nuts are embedded in the shaft core in a shape that fits into the taper hole, and after placing concrete using the thin-walled formwork, place the cemented taper cone in the taper hole. Characterized by screwing.

Since the thin-walled formwork integration method of the present invention is configured as described above, the versatility of the thin-walled formwork and various taper cones is improved, and these can be easily combined to construct a structure. It is possible to build and integrate molds that match the shape, which greatly improves the productivity of the factory and contributes to the improvement of workability and workability.

Next, the thin-walled mold used in the method for integrating the thin-walled molds according to the present invention is formed by pressure molding, extrusion molding,
Form casting and molding can be used, but productivity,
Pressure molding is the most suitable in terms of delivery time, physical properties, price, etc.

Further, the taper cone used in the method for assembling and integrating a thin-walled mold according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic transverse cross-sectional view showing an example of a taper cone for embedding used in the method for integrating thin-walled molds according to the present invention, in which (a) is a separator holding nut with intermediate partition,
(B) is a taper cone in which a bolt and (c) are embedded, and FIG. 2 is a taper cone (a fastener in which a nut with a shaft foot bolt is embedded, which is used in the method for integrating and constructing a thin-walled form of the present invention. 2) is a schematic cross-sectional view showing an example of FIG.

As shown in FIG. 1, the embedding taper cone is one in which bolts or nuts are embedded in the shaft core, and the taper angle of each cone is made to match the taper hole of the thin-walled form, The outer diameter of the bolt used and the diameter of the nut root are also standardized to match.

In the future, the taper cone used in the method for integrating thin-walled molds according to the present invention will be referred to as a U-cone in FIG. 1 (a), a B-cone in FIG. 1 (b) and a B-cone in FIG. 1 (c). The description will be made assuming that the name is E-cone and the name in FIG. 2 is H-cone.
In addition, the above-mentioned first to eighth tapered cones are U-cone,
The comparison with B cone, E cone, and H cone is as follows. U cone → 4th taper cone, 8th taper cone B cone → 3rd taper cone, 7th taper cone E cone → 2nd taper cone, 6th taper cone H cone → 1st taper cone, 5th taper cone

The U-cone shown in FIG. 1 (a) is a taper cone for supporting a blank frame in which a separator retaining nut 2 with a partition is embedded, and is mainly used for fixing a separator bolt and connecting an H-cone. Used for.

The B cone in FIG. 1B is a taper cone in which the bolt 3 is embedded, and is used for connecting the U cone and the thin-walled formwork, and is screwed into a taper hole previously formed in the formwork. This not only prevents corrosion, but also ensures the integration of the thin-walled formwork and cast-in-place concrete.

The E-cone in FIG. 1 (c) is a tapered cone in which the nut 4 is embedded. By screwing the H-cone into the screw hole removed from the formwork, not only corrosion prevention but also thin-walled formwork and cast-in-place concrete are performed. It ensures the integration with.

The H-cone of FIG. 2 is a taper cone (fastener) in which the nut 5 with the shaft foot bolt is embedded, and the length L of the taper portion of the cone is the same as or larger than that of the thin-walled formwork to be set. The resin taper cone manufactured as described above.

The expansive cement used in the taper cone for embedding of the present invention is usually a high-strength Portland cement, various mixed cements, and expansive agents such as calcium, sulfoaluminate, free lime, and anhydrous gypsum (type II). However, ordinary cement can withstand the use sufficiently.

The mixing ratio of various raw materials of the cement mortar used for the taper cone for embedding of the present invention is as follows: expanded cement (or normal cement) 100 wt%, silica sand 50-.
300 wt%, additive 0.3-0.5 wt%, water 30-
60 wt%.

The embedding taper cone of the present invention is obtained by kneading the above-mentioned mixture with a kneader such as a roll mill, and pressing the cement mortar, which is the kneaded product, by a method such as hot pressing and normal temperature pressing. It can be obtained by steam curing, normal temperature curing, autoclave curing, and heat curing. Furthermore, it is preferable that the cement mortar is pressed and formed to a high density with an apparent specific gravity of 2.20 or more, because the compressive strength is further increased, but the target can be achieved even by the ordinary pouring method.

As described above, the thin-walled formwork integration method of the present invention standardizes the tapered holes and the tapered cones formed in the thin-walled formwork, combines them, and molds according to the shape of the structure. It can be contributed to labor saving, improvement of productivity, shortening of construction period and cost reduction at construction sites and thin-wall form factories, by incorporating it into and integrating it with cast-in-place concrete.

[0029]

EXAMPLES The present invention will be described in more detail based on the examples shown in the accompanying drawings, but the present invention is not limited thereto. (Embodiments 1 to 5) FIG. 3 is a schematic view showing an embodiment of the method for integrating and constructing thin-walled formwork of the present invention in the case of a wall (Embodiment 1). FIG. 4 is a schematic view showing an example of the method of integrating the thin-walled formwork according to the present invention in the case of a floor (Example 2). FIG. 5 is a schematic view showing an example of the method of integrating the thin-walled formwork of the present invention in the case of columns and beams (Examples 3 and 4). 6A and 6B are novel plate washers used in another embodiment of the method for integrating thin-walled molds according to the present invention, in which FIG. 6A is a schematic front view and FIG. 6B is a schematic cross-sectional view. is there. (Embodiment 5) FIG. 7 is another embodiment of the method for assembling a thin-walled formwork according to the present invention, in which (a) is an H-cone and (b) is E when a new plate washer is used. Cone, (c) is a schematic cross-sectional view of the attachment portion of the B-cone, U-cone and the thin-walled mold. (Embodiment 5) FIG. 8 is a schematic view showing another embodiment using a novel plate washer in the method of building and integrating thin-walled formwork of the present invention in the corner portion in the case of columns and beams. (Example 5)

(Example 1: In the case of wall) Example 1 is shown in FIG.
More specifically, the H-cone 9 which is a set bolt is screwed in from the large diameter side so that the washer 12 portion of the round separator 11 comes into close contact with the small diameter side of the taper hole 25 formed in the thin mold 10 (FIG. 3). Next, the reinforcing round pipe 16 and the round pipe washer 15 are assembled in accordance with the general formwork method, and the building is performed with the foam tie 14 (FIG. 3). Finally, after the concrete is poured and cured, the round pipe 16, the round pipe washer 15, the foam tie 14 and the H-cone 9 are removed by the same method as a general formwork method. And H cone 9
The washer 12, the round separator 11 and the taper part of the thin wall mold 10 are pre-applied with non-vulcanized rubber, resin emulsion, cement paste, etc. to the taper hole 25 from which the E-cone 8 is screwed in. (Fig. 3
). Through the above steps, the construction of the thin-walled formwork and the integration of the cast-in-place concrete in the case of the wall are completed (Fig. 3).

(Example 2: In case of floor) Example 2 is shown in FIG.
To explain, the B cone 7 is screwed so that the small diameter side of the U-cone 6 closely contacts the small diameter side of the tapered hole 25 formed in the thin mold 10. Next, before screwing in the B-cone 7, non-vulcanized rubber, resin emulsion, cement paste or the like is applied in advance to the tapered hole 25 to measure airtightness (FIG. 4). It should be noted that if a Y-shaped or similar anchor metal fitting is screwed into the large diameter side of the U-cone 6, the integration can be further ensured. Through the above steps, the building of the thin-walled formwork and the integration of the cast-in-place concrete in the case of the floor are completed (Fig. 4).

(Example 3: In the case of columns and beams / when connected to a circular separator) Example 3 will be described with reference to FIG.
The L-shaped steel 18 having the stupid hole at a predetermined position is installed at the corner (FIG. 5), and the small diameter side of the U-cone 6 with the circular separator 11 connected to the large diameter side and the stupid hole of the L-shaped steel 18 are installed. , And the small-diameter side of the tapered hole 25 formed in the thin-walled mold 10 and the stupid hole of the L-shaped steel 18 are closely contacted with each other, and then the H-cone 9 which is a set tie for a foam tie
Screw. Next, the round pipe 16 and the round pipe washer 15 are assembled according to the general formwork construction method, and the form tie 1
Construction is performed at 4 (Fig. 5). Finally, after pouring and hardening the concrete, the round pipe 1
6. Remove washer 15 for round pipe, foam tie 14 and H cone 9. Then, non-vulcanized rubber, resin emulsion, cement paste or the like is applied in advance to the tapered hole 25 from which the H-cone 9 has been removed, airtightness is measured, and the E-cone 8 is screwed in (FIG. 5). Through the above steps, the integration of the thin-walled form in the case of columns and beams and the integration with cast-in-place concrete are completed (Fig. 5).

(Example 4: In the case of columns and beams / when not connected to a circular separator) Example 4 will be described with reference to FIG. 5. An L-shaped steel 18 provided with a fool hole at a predetermined position is installed in a corner portion. Then, the B cone 7 is screwed in so that the small diameter side of the tapered hole 25 formed in the thin mold 10 and the small diameter side of the L-shaped steel and the U cone 6 are in close contact with each other (FIG. 5). Next, B
Before the cone 7 is screwed in, a non-vulcanized rubber, resin emulsion,
Cement paste or the like is applied in advance to measure the airtightness, and the B cone 7 is screwed in. If a Y-shaped or similar anchor metal fitting is screwed into the large diameter side of the U-cone 6, the integration can be surely performed. Through the above steps, the integration of the thin-walled form in the case of columns and beams and the integration with cast-in-place concrete are completed (Fig. 5).

(Embodiment 5: When a new plate washer is used-The taper cone L portion due to the wall thickness of the thin-walled mold (see FIG. 2)
Method of mounting U, B, E, H taper cone and thin-walled form in the case where is large) A schematic front view of a new plate washer is a rectangle as shown in FIG. A perforation hole 26 for use is provided. In addition, as shown in FIG. 6B, the schematic sectional view shows a nut having a raised portion in the center (a groove type having both end edges). In this way, the new plate washer 27 is held on the small-diameter side of the tapered cone 1 protruding from the thin-walled mold at the time of installation, so that the tapered cone 1 is held by both the thin-walled mold 10 and the plate washer 27. However, it is expected that the workability at the time of installation will be improved and that the thin-walled formwork and the cone will not be disengaged. In addition, FIG.
H cone, FIG. 7 (b) is an E cone, and FIG. 7 (c) is a schematic cross-sectional view of an attachment portion between the B cone and the thin-walled mold at the time of the U cone. Basically, the construction is performed in the same manner as in the first to fourth embodiments described above, except that the thin form 10
If the thickness of the taper and the length (L) of the tapered cone 1 are different,
Since a part of the taper cone 1 on the small diameter side projects, a new plate washer 27 is used in this part to prevent the thin-walled form frame and the cone from being disengaged and to improve workability. As a result, it is relatively easy and reliable to build a column or a beam, especially in a poor workability such as an entering corner as shown in FIG. 8A or an exiting corner as shown in FIG. 8B. It can be performed.

[0035]

As described above, the method for integrating and constructing thin-walled formwork of the present invention standardizes the tapered hole and the tapered cone formed in the thin-walled formwork, and combines them to obtain the shape of the structure. By building a combined mold and integrating it with cast-in-place concrete, it is possible to contribute to labor saving, improvement of productivity, shortening of construction period, and cost reduction at construction sites and thin-wall form production plants.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing an example of a taper cone for embedding used in the method for integrating thin-walled molds according to the present invention, in which (a) is a separator retaining nut with intermediate partition,
(B) is a taper cone in which a bolt and (c) are embedded.

FIG. 2 is a schematic cross-sectional view showing an example of a taper cone (fastener) in which a nut with a shaft foot bolt used in the method for integrating thin-walled molds according to the present invention is embedded.

FIG. 3 is a schematic view showing an embodiment in the case of a wall of the method of building and integrating thin-walled formwork of the present invention.

FIG. 4 is a schematic view showing an embodiment in the case of the floor of the method for integrating thin-walled formwork according to the present invention.

FIG. 5 is a pillar of a method for integrating and constructing thin-walled molds of the present invention,
It is a schematic diagram showing an example in the case of a beam.

6A and 6B are novel plate washers used in another embodiment of the method for integrating thin-walled molds according to the present invention, in which FIG. 6A is a schematic front view and FIG. 6B is a schematic cross-sectional view. is there.

FIG. 7 is another embodiment of the method of integrating thin-walled formwork according to the present invention, in which (a) when a new plate washer is used.
H cone, (b) E cone, (c) B cone, U
It is a schematic sectional drawing of the attachment part of a cone and a thin-walled form.

FIG. 8 is a schematic view showing another embodiment using a novel plate washer in the method for integrating and constructing thin-walled formwork of the present invention in a corner portion in the case of columns and beams.

FIG. 9 is a schematic sectional view of a mounting portion of a conventional thin-walled formwork method.

FIG. 10 (a) is an example in the case of a pillar of a conventional thin-walled formwork method. (B) A detailed view of A and B parts of (a).

FIG. 11A is an example in the case of a beam of a conventional thin-walled formwork method. (B) Detailed drawing of the C section of (a).

[Explanation of symbols]

 1 Taper Cone Main Body 2 Separator Holding Nut with Partition Partition 3 Bolt 4 Nut 5 Nut with Axial Foot Bolt 6 U Cone 7 B Cone 8 E Cone 9 H Cone 10 Thin Wall Form 11 Round Separator 12 Washer 13 Butter Angle 14 Form Tie 15 Round Pipe Washer 16 Round pipe 17 Supporting work 18 L-shaped steel 19 Hexagon nut 20 Hexagon bolt 21 Embedding metal fitting 22 Separator insert 23 U-shaped separator 24 Through separator 25 Taper hole 26 Drilling hole 27 Sheet washer

Claims (7)

[Claims] 1. A method of building and integrating a thin-walled formwork, which comprises using the thin-walled formwork as it is as a finishing substrate and integrating it with cast-in-place concrete when pouring concrete using the thin-walled formwork, Prepare a taper hole in a thin-walled formwork and prepare a cemented taper cone in which a bolt or nut is embedded in the shaft core in a shape that fits into the tapered hole, and cast concrete using the thin-walled formwork. After that, the cemented taper cone is screwed into the taper hole of the thin-walled formwork, and the thin-walled formwork is built and integrated. 2. A method of placing concrete by using a thin-walled formwork to construct a wall, the shaft foot bolt having a shape to be fitted in the tapered hole formed in the thin-walled formwork. After the first taper cone with the embedded nut is screwed in and built, concrete is placed and hardened, then the first taper cone is removed, and the nut is embedded in the shaft core in the tapered hole. A method of integrating thin-walled formwork, characterized by screwing in a second taper cone. 3. A method of constructing a floor by pouring concrete using a thin-walled formwork, wherein a bolt is attached to a tapered hole formed in the thin-walled formwork and to a shaft core having a shape fitted into the tapered hole. While screwing in the third tapered cone embedded in,
A method for assembling and integrating a thin-walled formwork, characterized in that a fourth taper cone having a nut embedded in a shaft is screwed into the third taper cone. 4. A method for constructing a pillar or a beam by pouring concrete using a thin-walled mold, comprising: a thin-walled mold having a tapered hole, and an L provided with a hole at the same position as the tapered hole. After overlapping the shape steel and screwing in a fifth tapered cone in which a nut with a shaft foot bolt having a shape that fits in the tapered hole is screwed in, concrete is placed and hardened, then the fifth tapered cone is removed, A method for assembling and integrating a thin-walled formwork, characterized in that a sixth taper cone having a nut embedded in the shaft core is screwed into the taper hole. 5. A method of pouring concrete using a thin-walled formwork to construct a pillar or a beam, wherein a thin-walled formwork with a tapered hole and an L provided with a hole at the same position as the tapered hole. Overlap with the shape steel, and screw in a seventh taper cone with a bolt embedded in the shaft core of a shape that fits into the taper hole, and in the seventh taper cone, an eighth taper cone with a nut embedded in the shaft core. A method of integrating thin-walled formwork by screwing. 6. The thin-walled mold according to claim 2, wherein a nut attached to the long bolt is brought into close contact with the small-diameter side of the taper hole formed in the thin-walled mold. Built-in integration method. 7. The method for assembling a thin-walled formwork according to claim 6, wherein the nut attached to the long bolt has a hat-like shape with a raised central portion.