JPS6142071B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method of constructing a slab using a convex formwork.

[Conventional technology]

With the recent trend toward lighter weight reinforced concrete buildings, so-called Watsuful slabs are being constructed by employing a construction method that reduces the thickness of the concrete by excluding the reinforcement areas when constructing the slab.

As a method for constructing this Watsuful slab, for example, a large number of trapezoidal formworks are regularly arranged on the upper surface of the panel, reinforcement is placed in the gaps between the formworks, and concrete is poured.

[Problem that the invention seeks to solve]

However, with this method, when trapezoidal formwork is arranged on the top surface of the panel, it is necessary to draw lines on the panel with ink or the like in order to maintain a regular distance between the formwork, which is inefficient. It will be a lot of work.

The present invention has been made in view of these conventional problems, and it is an object of the present invention to provide a slab construction method that can omit intermediate work such as scribing.

[Means for solving problems]

In order to achieve this objective, the slab construction method of the present invention involves protruding a plurality of protrusions of a desired height on a rectangular substrate in a lattice-like arrangement at desired intervals, and the entire structure is made of foamed resin. A large number of formworks are laid tightly on the construction floor surface, reinforcement is placed in the required two directions in the gap formed between the top surface of the formworks and the adjacent convex parts, and concrete is poured onto the formworks. It is characterized by constructing a slab.

The above formwork will be removed after concrete is poured and dried, but the formwork may be left on the concrete ceiling surface for insulation and soundproofing purposes.

[Effect]

In the present invention, the formwork having the above-mentioned structure is tightly spread over the construction floor surface, that is, the panel, so that the convex portions are arranged in a lattice pattern at equal intervals as a whole. Thereafter, reinforcement is placed in two directions within the gap formed between the upper surface of the formwork and the adjacent convex portions. Next, concrete is poured onto the formwork to form a slab surface, and after the concrete has cured and dried, the panels are removed. At this time, the panels are only placed on formwork and are not in direct contact with the concrete, so removal work is easy.

The above-mentioned formwork is usually released from the concrete ceiling surface after the panel is removed, but it can also be left on the concrete ceiling surface without being released, to provide heat insulation and soundproofing effects to the ceiling surface.

As described above, by the method of the present invention, a ceiling slab is constructed in which the portion where reinforcement is arranged in two directions functions as a beam, and the other portions are made of thin concrete. Therefore, a lightweight building can be constructed while maintaining strength.

〔Example〕

Hereinafter, the present invention will be specifically described based on embodiments shown in the drawings.

As shown in FIGS. 1 and 2, the formwork of the present invention has a shape in which four convex portions 2 are protruded in a cross-shaped arrangement on a square substrate 1, and the entire mold is made of styrofoam. It is what was done. 3 in the figure is a spacer support embedded in the formwork, which supports the spacer to maintain the distance between the formwork and the reinforcing bars, and prevents damage to the formwork body due to the load of the reinforcing bars. .

When constructing a slab using this formwork, the formwork is laid over the entire construction surface on the panel 4 as shown in Figure 3, and the main reinforcements 5, sub-reinforcements 6, supplementary reinforcements 7, etc. are placed in the mold. 2 between the upper part of the frame and adjacent convex parts 2
Place reinforcement in the direction. These reinforcing bars are supported by spacers interposed on the spacer support 3. Thereafter, concrete is poured, and after it hardens, the panel 4 and main formwork are removed. This results in
The Watsuful slab is completed. Therefore, on the lower surface of the slab, the portions corresponding to the convex portions 2 of the main form are recessed, and the groove-like portions between the convex portions 2 are in a protruding state, and the protruding portions have a lattice shape. This part is reinforced, so it is strong, and the recessed part is thinner, reducing the overall weight. In addition,
Since this formwork is made of foamed resin such as styrofoam, it can be attached to the bottom of the slab as it is and used as a heat-insulating and sound-insulating slab by applying paint or the like.

〔Effect of the invention〕

As described above, according to the present invention, a mold with unevenness can be formed by simply laying the mold in a close contact state. By arranging reinforcement on this formwork and pouring concrete, cross-shaped two-way reinforcement is created between the convex parts of the formwork, so the load can be transmitted in two directions, the strength is strong, and the small beam It is possible to obtain a spacious space without the need for a slab, and it is also possible to reduce the weight of the slab. In addition, construction is easy, and since the formwork is made of foamed resin, it is lightweight and
It's cheap.

Furthermore, if the formwork of the present invention is left on the concrete surface without being removed, insulation,
A soundproof slab can be formed.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of the formwork according to the present invention, FIG. 2 is a sectional view taken along the line - in FIG. 1,
FIG. 3 is a longitudinal sectional view showing an example of a construction method using the formwork according to the present invention. 1: Substrate, 2: Convex portion, 3: Spacer support.

Claims (1)

[Scope of Claims] 1. A construction floor with a large number of formworks each having a plurality of protrusions of a required height protruding from a rectangular substrate in a lattice-like arrangement at required intervals, and formed entirely of foamed resin. The slab is constructed by laying the concrete in close contact with the surface, placing reinforcement in two directions in the gap formed between the upper surface of the formwork and the adjacent convex parts, and pouring concrete onto the formwork. Characteristic slab construction method. 2. The method for constructing a slab according to claim 1, wherein the formwork is left on the concrete ceiling surface as it is after constructing the concrete slab.