JPH0593443A - Pca form serving also as structural body - Google Patents

Abstract

PURPOSE:To enhance workability and reliability, and lighten weight, and improve durability by arranging vertical channels and horizontal channels on the one surface of a PCa board, to form salient section groups, and to enhance the jointing performance of cast-in-place constructed sections on the board surface, and to form the constructed sections integrally, and by enabling hollow section to be formed with the combinations of permanent forms to be arranged on the deep channel sides. CONSTITUTION:On the one surface of a PCa board 2 reinforced with arranged reinforcements 3, a plurality of vertical channels 5 and horizontal channels 6 are arranged vertically and horizontally at intervals, and the groups of salient sections 8 are formed. Besides, on the PCa mold to be served also for a structural body, permanent forms 9 to be arranged on the deep channel sides of the vertical channels 5 or the horizontal channels 6 and for forming hollow sections S in the internal sections of the deep channels are combined 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 skeleton PCa (precast concrete) formwork used as a construction formwork for building floor slabs, floor support plates, beams and the like and serving as a structural member of the skeleton.

[0002]

2. Description of the Related Art Recently, in order to rationalize on-site work in building construction and to save labor, various types of skeleton PCa (precast concrete) that are used as construction forms for columns, beams, floor slabs, etc. ) Formwork has been developed and widely used. For example, as shown in FIG. 3, a PCa formwork 10 for both body and body, which is reinforced by vertical and horizontal bar arrangements 11a and has a group of concave cotters 12 arranged on the upper surface, is illustrated. As shown in FIG. 1, the upper end floor main bars are arranged on the formwork 10 on the columns and beams.
There is proposed a construction method in which the concrete 13 is cast and the upper half of the floor is cast on-site on the lower half of the floor constituted by the mold 10 (for example, Japanese Patent Publication No. 62-6061). As shown in FIG. 4 (A), a PCa formwork 20 for both body and frame, which is reinforced by reinforcing bars (not shown) and has an inverted U-shaped reinforcing bar cotter 22 group projecting on the upper surface, is arranged on the pillar as shown in the figure. There is a construction method in which the floor slab (not shown) is laid on the formwork 20 and concrete is placed on the formwork 20, and the floor slab is integrally constructed on the floor support plate composed of the formwork 20. Proposed (for example, Japanese Patent Laid-Open No. 59-122653), and as shown in FIG. 4B, a PCa beam 30 reinforced by a bar arrangement (not shown) and provided with a group of convex strip cotters 32 on its upper surface. Concrete is placed on the floor by connecting the floor slabs (not shown) and connecting them. Construction of applying the floor slab together have been proposed on the beam consists of a beam 30, concave Kotsuta 12
Group, rebar cotter group 22, or convex cotter group 32
By incorporating the reinforcement of the site cast construction part into the formwork, biting the cast concrete to increase the joint strength and integrate it to enhance the construction performance and reliability, greatly simplifying the site work process. The construction efficiency has been improved, streamlined, and labor-saving.

[0003]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In the Ca formwork, the concave cotter group, the reinforcing bar cotter group, etc. are insufficient in the concrete biting of the cast-in-place construction portion with respect to the formwork portion, are defective, and secure the joint strength,
There is a problem in construction performance and reliability such as integration. The present invention has been developed in view of the actual situation as described above,
The purpose is to form vertical grooves and horizontal grooves on one surface of the PCa plate to form a group of protrusions, and to enhance the joining performance of the cast-in-place construction part to the mold forming the skeleton and to integrate it. The purpose of the present invention is to provide a skeleton / composite PCa formwork capable of forming a hollow portion by a combination of abandoned formwork arranged on the deep groove side, improving construction performance and reliability, and reducing weight to improve durability.

[0004]

SUMMARY OF THE INVENTION According to the present invention, a plurality of vertical grooves and horizontal grooves are arranged at intervals of vertical and horizontal directions on one surface of a PCa plate reinforced by a steel rod to form a projection group. By doing so, it is easy to install the reinforcement in the cast-in-place construction part and the biting of the cast concrete is made good, and the hollow part is formed by the combination of the scrap frame arranged on the deep groove side of the vertical groove or the horizontal groove. It enables the formation of and makes it lighter.

[0005]

[Function] The steel bar on the side of the cast-in-place construction can be easily moved vertically and horizontally in a plurality of vertical grooves and horizontal grooves that are arranged with vertical and horizontal intervals on one surface of the PCa plate reinforced by the steel rod. In addition to being built into the bar, the vertical groove and the horizontal groove are effectively bite and filled with the concrete cast in-situ, and the joint strength of the cast-in-place construction part to the plate surface (form frame that becomes the body) is significantly increased. The joint strength in the vertical and horizontal directions is adjusted to a desired value by changing and adjusting the cross-sectional shape and depth of the vertical groove and the horizontal groove, and excellent construction performance and reliability are obtained.

[0006] In addition, a scraping frame is disposed and combined on the deep groove side of one of the vertical groove or the horizontal groove, and a hollow portion can be formed inside the deep groove to reduce the weight and enhance the durability.

[0007]

[Embodiment] FIG. 1 shows a first embodiment of the present invention, which is also used as a skeleton P.
An overall perspective view of the Ca formwork, a side view mechanism diagram showing a concrete example of constructing a floor slab using the PCa formwork for the same body in FIG. 2, a plan view of FIG. 2 in FIG. 3, and 1 in the drawing is a factory A pre-cast concrete PCa formwork of the present invention, which is pre-manufactured by, for example, 2 is a PCa (precast concrete) plate, 3 is a reinforcing steel rod vertically and horizontally embedded in the PCa plate 2, for example, a reinforcing bar or P
On one surface of the PCa plate 2 reinforced by the C steel rod 3,
The PCa formwork 1 also serves as a skeleton PCa in which a plurality of vertical grooves 5 and horizontal grooves 6 are arranged at vertical and horizontal intervals to form a group of protrusions 8.

As shown in FIG. 1, a plurality of vertical grooves 5 are provided on one surface (the upper surface in the drawing) of the PCa mold 1 for the body and the body.
Is formed to form a ridge 7, and a plurality of lateral grooves 6 are arranged at a lateral interval, and the vertical grooves 5 and the lateral grooves 6 are provided on the upper surface in the figure to separate the vertical and horizontal projections. As shown in the figure, each vertical groove 5 is formed as a deep groove and each horizontal groove 6 is formed as a shallow groove so that the vertical and horizontal arrangements in the cast-in-place portion (floor slab) are formed. It has an integrated structure that allows for flexible adjustment of the amount of reinforcement and the amount of concrete ingestion to improve joint strength.

2 and 3 show an example of construction of a floor slab by the PCa formwork 1 which also serves as a skeleton. In FIG. 6, reference numeral 30 denotes the PCa beam shown in FIG. 6B, which includes a large number of star laps 31a and a plurality of pieces. It is a beam member having a structure in which ridges 32 are reinforced by reinforcing bars 31b such as lower end beam main bars and upper end beam main bars, and is provided on the PCa beam 30 installed between columns. The PCa formwork 1 which is also used as a skeleton is arranged as shown in the drawing, and floor slab reinforcements (not shown) of the floor upper half portion 1a are laid on them and concrete is poured, and together with the beam upper portion, the floor upper half portion 1a.
The work is done in-situ and joined together for construction.

The construction of the floor slab is extremely easy on the PCa formwork 1 also used as a skeleton, and is quickly reinforced and concrete is placed, and it is effectively incorporated into the PCa formwork 1 used as a skeleton (bottom half of the floor). At the same time, the cast concrete in the upper half of the floor is sufficiently bited into each vertical groove 5 and each horizontal groove 6 to effectively increase the joint strength in the vertical and horizontal directions. The joint strength can be freely adjusted by changing and adjusting the depth, the cross-sectional shape, the cross-sectional area, and the like as necessary. Further, the vertical groove 5 and the horizontal groove 6 are provided in the longitudinal direction of the PCa plate 2 as necessary.
The PCa beams 30 shown in FIG. 2 may be arranged so as to be oriented in the width direction or in the oblique direction and may be arranged in an oblique manner.
1 can be formed on each of the ridges 7 with a group of protrusions 8 shown in FIG. 1 to further enhance the construction performance of the beam upper part and the floor slab.

FIGS. 4 (A) and 4 (B) show a second embodiment of the present invention. In the PCa formwork 1 also used for the skeleton of the first embodiment, the vertical groove 5 or the horizontal groove 6 is located on the deep groove side (vertical in the illustrated example). It is a PCa formwork also used as a skeleton, which is arranged in the groove 5) and forms a hollow portion S inside the deep groove 5, and the scrap frame 9 is formed on each deep groove side (vertical in the illustrated example). Figure 4 (B) in the groove 5)
The floor slab reinforcements 3a of the floor upper half 1a are laid on them and concrete is placed on them, and the floor upper half 1a and the upper part of the beam are cast in-situ and integrally joined. To do. In the case of the second embodiment, each of the vertical grooves 5 on the scrap frame 9,
The lateral groove 6 functions to integrally join the lower half of the floor and the upper half of the floor to obtain the same function and effect, and a space portion having a fixed shape is easily and accurately formed inside each deep groove (vertical groove shown). Therefore, the weight is reduced and the durability is enhanced.

The present invention is widely applied not only to floor slabs but also to various forms such as beams, which also serve as a frame.

[0013]

The present invention has the above-mentioned structure.
Reinforcing bars on the side of the cast-in-place construction can be easily incorporated in the vertical and horizontal directions in a plurality of vertical grooves and horizontal grooves arranged with vertical and horizontal intervals on one surface of the PCa plate reinforced by the reinforcing bars. At the same time, the vertical and horizontal grooves are effectively bite and filled with cast-in-place concrete, and the plate surface, that is, the joint strength of the cast-in-place portion to the formwork that is the skeleton is significantly increased and integrated. By adjusting the cross-sectional shape and depth of the vertical and horizontal grooves, the joint strength in the vertical and horizontal directions can be easily adjusted to the desired value, simplifying the process of on-site work, improving construction efficiency, and saving labor. The joint performance of cast-in-place concrete is effectively enhanced and integrated, resulting in excellent construction performance and reliability.

Further, by combining a scrap frame disposed on the deep groove side of one of the vertical groove or the horizontal groove, a hollow portion can be formed inside the deep groove, and the weight can be reduced and the durability can be improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is a side view mechanism diagram showing a usage mode of the first embodiment.

FIG. 3 is a plan view mechanical diagram of FIG.

FIG. 4 is a side view mechanism diagram (A) showing the second embodiment of the present invention and a main part enlarged mechanism diagram (B).

FIG. 5 is a perspective view showing a conventional example for floor slab construction.

FIG. 6 is a perspective view (B) showing a conventional example (A) for a floor slab support plate and a conventional example for a beam.

[Explanation of symbols]

 1 PCa formwork that also serves as a body 2 PCa version 3 Reinforcement 5 Vertical groove 7 Horizontal groove 8 Projection 9 Waste form S S Hollow part

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[Procedure amendment]

[Submission date] September 9, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction content]

Further, by combining a scrap frame provided on the deep groove side of one of the vertical groove and the horizontal groove, a hollow portion can be formed inside the deep groove, and the weight is reduced and the durability is improved.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] Brief explanation of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is a side view mechanism diagram showing a use mode of the first embodiment.

FIG. 3 is a plan view mechanism diagram of FIG. 2.

FIG. 4 is a side view mechanism diagram (A) showing a second embodiment of the present invention.
And its enlarged view (B)

FIG. 5 is a perspective view showing a conventional example for floor slab construction.

FIG. 6 is a perspective view showing a conventional example for a floor slab support plate (A).
It is a perspective view (B) which shows the conventional example for a beam.

[Explanation of Codes] 1 PCa formwork that also serves as a body 2 PCa version 3 Bar arrangement 5 Vertical groove 7 Horizontal groove 8 Projection 9 Waste form S S Hollow part

Claims (2)

[Claims] 1. A skeleton-combined body, characterized in that a plurality of vertical grooves and horizontal grooves are arranged on one surface of a PCa plate reinforced by steel rods at vertical and horizontal intervals to form a group of protrusions. PCa formwork. 2. The PCa formwork also used as a skeleton according to claim 1, characterized in that a scraping form which is arranged on the deep groove side of the vertical groove or the horizontal groove and forms a hollow portion inside the deep groove is combined. PCa formwork that also serves as a body.