JPH07305444A - Constitution of hollow concrete slab - Google Patents

Abstract

PURPOSE:To save labors in a construction site of a hollow concrete slab and reduce the construction period. CONSTITUTION:A lower end reinforcements unit 1 is arranged on a slab form at site by use of the lower end reinforcements unit 1 made of a plurality of lower end reinforcements 11 and auxiliary reinforcements, the upper end reinforcements unit 4 made of a plurality of upper end reinforcements 41 and auxiliary reinforcements, a hollow pipe unit made of a plurality of hollow pipes 21, 31 parallelly arranged at every distance and reinforcements 22, 32 A hollow pipe unit is arranged on the lower end reinforcements unit 1 and further, the upper end reinforcements unit 4 is arranged thereon and these are connected to each other.

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 a hollow concrete slab using a prefabricated unit.

[0002]

2. Description of the Related Art The applicant has proposed that a slab having a beam type beam floor structure or a hollow slab having a hollow portion formed in one direction can reduce the thickness of the slab in two directions. A two-way hollow slab in which the pipes are placed
Proposed in No. 66, but because the lower end bar and the upper end bar and the hollow pipe are arranged on site, the bar arrangement and piping work are complicated,
The construction period tends to be prolonged.

Particularly in a two-way hollow slab, the central portions in the long side direction and the hollow pipes arranged on both sides thereof have different directions, and the directions in which the load flows are different. Since it is necessary to maintain the continuity of the muscles, it takes time and effort to arrange the muscles in this part.

The present invention has been made in view of the above background, and proposes a method for constructing a hollow concrete slab that saves labor on site.

[0005]

According to the present invention, the lower end bar, the upper end bar, and the hollow pipe are unitized in advance, each unit is installed on the site, and the units are connected to each other to save labor on site and shorten the construction period. Turn into.

The lower end muscle unit is composed of a plurality of lower end muscles and auxiliary muscles connecting them, and the upper end muscle unit is also composed of a plurality of upper end muscles and auxiliary muscles connecting them, both of which are unitized in a certain size. It The hollow pipe unit sandwiches a plurality of hollow pipes and hollow pipes arranged in parallel at a distance from each other, and is formed as a unit from a main bar orthogonal to a lower end bar and an upper end bar.

[0007] In the field, a lower end reinforcement unit is placed on a slab formwork, a hollow pipe unit is placed on it, and an upper end reinforcement unit is placed on it, and these are connected to each other to form a hollow concrete slab. Arrangement and piping are completed. Since the work on site is only to connect each unit, the labor can be saved and the construction period can be shortened accordingly.

Further, the quality of the hollow concrete slab is improved by prefabricating the reinforcing bar and the pipe.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention, as shown in FIG.
Hollow concrete slab consisting of lower end reinforcement unit 1 consisting of 11, upper end reinforcement unit 4 consisting of a plurality of upper end reinforcements 41, and hollow pipe units 2 and 3 formed of a plurality of hollow pipes 21 sandwiched between the two. Is a method of configuring. FIG. 5 shows the arrangement of the hollow pipes 21 and 31 on the slab formwork 5. In the center of the hollow concrete slab, the axis is oriented in the direction of the short side, and the hollow has the length over the entire length of the short side. A pipe 21 is provided, and on both sides of the pipe 21, a hollow pipe 31 whose axis is oriented in the long side direction is arranged.

As shown in FIG. 2, the lower end muscle unit 1 is unitized into a certain size from a plurality of lower end muscles 11 and auxiliary muscles 12 connecting these, and the upper end muscle unit 4 is the same as shown in FIG. A plurality of upper end muscles 41 and auxiliary muscles 42 connecting them are unitized into a certain size.

As shown in FIG. 3, the hollow tube units 2 and 3 are a plurality of hollow tubes which are arranged in parallel at a distance from each other.
21 and 31 and the hollow tubes 21 and 31 are sandwiched from above and below,
And the main muscles 22 and 32 orthogonal to the upper end muscle 41 are unitized.

In the hollow pipe unit 2 in which the hollow pipe 21 faces the short side direction of the hollow concrete slab, the hollow pipe 21 is sandwiched by main bars 22, 22 parallel to its axis and auxiliary bars 23 orthogonal thereto.
The hollow tube unit 3 in which the hollow tube 31 is orthogonal to the hollow tube 21 is configured by sandwiching the hollow tube 31 between main bars 32 and 32 in a direction orthogonal to the axis and auxiliary bars 33 orthogonal to the main bars 32 and 32. .
Since the main bars 22 and 32 are arranged in the short side direction of the hollow concrete slab, the lower end bar 11 and the upper end bar 41 are force distribution bars.

The hollow tubes 21 and 31 are composed of main bars 22, 32 and auxiliary bars 23, 33.
While being restrained in the height direction by the restraint bars 24, 34, the restraint bars 24, 34 restrain the shoe in the width direction, and also restrain the lift-up during concrete placement. As the hollow tubes 21 and 31, spiral ducts, plastic tubes, paper tubes, styrofoam, etc. are used.

At the site, as shown in FIG. 1, a lower end streak unit 1 is arranged on a slab form 5, hollow tube units 2 and 3 are arranged thereon, and an upper streak unit 4 is further arranged thereon. , And connecting them to each other to complete the construction of the reinforcing bars and piping that make up the hollow concrete slab.

[0015]

Industrial Applicability The present invention is as described above, and a hollow concrete slab is constructed by unitizing the lower end bar and the upper end bar and the hollow pipe in advance, installing each unit on site, and connecting them to each other. Therefore, the on-site work is labor-saving and the work period can be shortened.

Further, the quality of the hollow concrete slab can be improved by prefabricating the reinforcing bar and the pipe.

[Brief description of drawings]

FIG. 1 is a perspective view showing an assembled state of each unit on site.

FIG. 2 is a perspective view showing a lower end streak unit.

FIG. 3 is a perspective view showing a hollow tube unit.

FIG. 4 is a perspective view showing an upper end streak unit.

FIG. 5 is a plan view showing an arrangement state of hollow tubes on a slab formwork.

[Explanation of symbols]

1 ... Bottom muscle unit, 11 ... Bottom muscle, 12 ... Auxiliary muscle,
2, 3 ... Hollow tube unit, 21, 31 ... Hollow tube, 22, 32
…… Main muscle, 23,33 …… Auxiliary muscle, 24,34 …… Restraining muscle, 4…
... Upper muscle unit, 41 ... Upper muscle, 42 ... Auxiliary muscle, 5 ...
… Slab formwork.

Front page continued (72) Inventor Shigeru Yamamoto 1-12-19 Kitahori, Nishi-ku, Osaka City, Osaka Prefecture Kurimoto Iron Works Co., Ltd. (72) Inventor Fumihiro Otani 2-5-23 Omiya, Chuo-ku, Fukuoka-shi, Fukuoka Otani Design Co., Ltd. (72) Inventor Kazuo Yoshimura 3-17-3 Arae, Saray-ku, Fukuoka-shi, Fukuoka Ishigaki Heights No. 2

Claims (1)

[Claims] 1. A method for constructing a hollow concrete slab comprising a lower end bar and an upper end bar, and a hollow pipe sandwiched between the lower bar and the upper bar, wherein a plurality of lower bar and a supplementary bar connecting these are fixed to each other. A lower end muscle unit that is unitized to a size, and an upper end muscle unit that is unitized to a certain size from a plurality of upper end muscles and auxiliary muscles that connect these,
A slab is used on-site by using a hollow pipe unit in which multiple hollow pipes and hollow pipes that are arranged in parallel at a distance from each other are sandwiched from above and below, and the main pipes orthogonal to the lower end and upper ends are unitized. A method for constructing a hollow concrete slab in which a lower end reinforcement unit is arranged on a formwork, a hollow pipe unit is arranged thereon, and an upper end reinforcement unit is further arranged thereon, and these are connected to each other.