JPH0472018B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) This invention relates to a method of constructing a thick plate floor slab.

(Problems to be solved by this invention) Conventionally, when constructing a floor slab with a reinforced concrete structure, etc., the formwork 1 placed on the lower surface is supported by temporary beams 2, brackets 3, or shoring, etc. After the work is completed, concrete 4 is generally poured and constructed.

However, since a large effective working space under the floor slab cannot be secured in order to install temporary beams, etc., the work is difficult and often interferes with piping.

Further, when performing reinforcement, it is necessary to attach reinforcement spacers 5 to the upper part of the formwork, etc., which makes the work complicated.

(Objective of the Invention) The present invention was devised to solve the above-mentioned problems, and its purpose is to provide a method for constructing a thick floor slab that can save labor and shorten the construction period.

(Structure of the Invention) This invention includes lower section steels 9, 9 attached to both left and right ends of the deck plate 7, and the deck plate 7
The lower parts of two diagonal members 8 located higher up and connected to the upper section steel 10 at the top are attached to the lower section steels 9, 9 to form a support member 6, and both ends of the support member 6 are supported, and arranged at predetermined intervals in the width direction,
An intermediate deck plate 7' is disposed between the supporting members 6.
and attached to the lower section steels 9, 9, upper end reinforcement is placed on the upper part of the support member, and lower end reinforcement is placed on the upper surface of the deck plate 7 and the intermediate deck plate 7', and then the support member 6 is placed. This is a floor slab construction method characterized by pouring concrete so as to bury the concrete.

(Example) Embodiments of the invention will be described with reference to the drawings.

First, as shown in Fig. 2, the lower section steels 9, 9 are attached to the bottom surface of both the left and right ends of the deck plate 7 at the factory.
Further, the lower portions of two diagonal members 8, 8 located above the deck plate 7 and connected to the upper section steel 10 at the top are attached to the lower section steel 9 to form a support member 6 having a triangular side surface.

The deck plate 7 is continuous in the longitudinal direction (front-back direction in the figure), and the upper and lower section steels 9 and 10 are also continuous. As shown in FIG. 3, the shaped steel 9 has a flat deck plate contact portion 9a.
and a diagonal member contact portion 9b made of two L-shaped steels.

The upper section steel material 10 is formed of L-section steel or the like.

Further, the diagonal members 8 are formed of angle iron, strip plates, etc., and are arranged at predetermined intervals in the longitudinal direction. Next, as shown in FIG. 4, two supporting members 6 are arranged at a predetermined interval on site, and an intermediate deck plate 7' is installed between the supporting members 6, 6. Further, the support member 6 is supported by a building structure such as a beam of a building.

The intermediate deck plate 7' is fixed by welding or the like to the deck plate abutting portions 9a of the left and right angle members 9, 9 so as to cover the entire lower surface.

In the reinforcing bar placement procedure, first, the upper end reinforcing bars 11 are attached to the upper part of the support member 9, and the upper end main reinforcing bars 12 are arranged thereon. The lower end main reinforcing bars 14 are assembled on the deck plate 7 and the intermediate deck plate 7' and are temporarily fastened to support the lower end distribution reinforcing bars 13 with the shaped steel members 9, and then the lower end main reinforcing bars 14 are arranged at predetermined intervals.

Note that the lower end reinforcements 13 and 14 may be arranged prior to the upper end reinforcements 11 and 12.

Near the end of the upper end reinforcing bar 11, the upper end main reinforcement 12 of the adjacent set is temporarily fixed, and the lower end distribution reinforcement 1
In the vicinity of the end of 3, the middle deck plate 7' and the lower end main reinforcing bar 14 of the adjacent set are temporarily fixed.

Next, as shown in FIG. 5, the built-in supporting members 6, 6, intermediate deck plate 7', etc. are lifted up and fixed in a predetermined position.

In the joint part, as shown in FIG.
The intermediate deck plate 7' temporarily fixed to the section steel member 9 is then fixed.

In addition, the upper end main reinforcement 12 and the lower end reinforcement 13 of the joint part,
Reinforce 14.

The lower end reinforcing bars 13, 13 of the joint part are a lap joint like the upper end reinforcing bars 11.

In the example, the pitch of the main bars 12, 14 and the reinforcing bars 11, 13 was set to 200 mm.

Finally, concrete 4 is placed on the deck plates 7, 7', and the support member 6 is buried in the concrete 4 of the floor slab.

[Effects of the Invention] The present invention has the above-mentioned configuration, in which the lower section steel is attached to both the left and right ends of the deck plate, and the lower sections of the two diagonal members located above the deck plate and joined to the upper section steel at the top. are attached to the lower section steel to constitute a support member, and the support members are supported by building structures such as beams and arranged at predetermined intervals in the width direction, and intermediate deck plates are arranged between the support members 6. Therefore, when concrete is placed on the top surface of the deck plate, the load of the concrete can be supported by the supporting member, and temporary beams, brackets, etc. are not required, saving labor and shortening the construction period. This allows for a wider working space under the floor, and allows for easier work without interference with piping.

Further, since the lower end reinforcements are attached to the upper surface of the deck plate and the upper end reinforcements are attached to the upper part of the support member, reinforcement work is easy and reinforcement spacers are not required.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view showing a conventional example, Figures 2 to 6
The figure is a front view showing an embodiment of the invention. 1... Disposable formwork, 2... Temporary beam, 3... Bracket, 4... Concrete, 5... Reinforcement spacer, 6... Supporting member, 7... Deck plate, 7
...Intermediate deck plate, 8...Diagonal material, 9...
Lower section steel, 10... Upper section steel, 11... Upper end distribution reinforcement, 12... Upper end main reinforcement, 13... Lower end distribution reinforcement, 1
4...Lower end main reinforcement.

Claims (1)

[Claims] 1 Lower section steel 9,
9 is attached, and the lower parts of two diagonal members located above the deck plate 7 and connected to the upper section steel 10 at the top are attached to the lower section steels 9, 9 to constitute the support member 6, and the support member 6 is The members 6 are supported by the building structure and arranged at predetermined intervals in the width direction, intermediate deck plates 7' are arranged between the support members 6, and attached to the lower section steels 9, 9, the support members 6 After arranging upper end reinforcements on the upper part of the deck plate 7 and lower end reinforcements on the upper surface of the deck plate 7 and the intermediate deck plate 7', concrete is poured so as to bury the support member 6. construction method.