JPH01226981A - Heat-insulating floor formwork and construction of heat-insulating floor therewith - Google Patents

Abstract

PURPOSE:To reduce the cost of floor construction by raising workability by a method in which a heat-insulating floor formwork formed of a heat insulator for placing slab concrete is set on a receiving beam, reinforcing bars are set on it, and concrete is placed. CONSTITUTION:A given number of heat-insulating formworks 3 formed of heat insulators for placing slab concrete are set closely on receive beams 10 of precast concrete 11 set equal intervals in parallel between beams. Reinforcing bars 4 are arranged on them and slab concrete C is placed to bury them. The needs for assembling, disassembling, and separating operations of the floor formwork and tempering work can thus be eliminated, removing troublesome under-floor operations.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an insulating floor form used for forming a concrete slab, and a method of constructing an insulating floor using the insulating floor form. .

[Conventional technology]

A heat insulating floor is constructed by having a heat insulating material under a floor plate such as a slab.

Conventionally, in order to form an insulated floor for a concrete building, after installing a floor form, a heat insulating material is pasted on the top of the floor form, and then concrete for forming a slab is poured on top of that. or half-P
After constructing a floor concrete slab by laying the C composite floorboard, arranging slab reinforcement on the top of it, and pouring concrete there, a heat insulating material is pasted on the lower surface (back side) of the half PC composite floorboard. It was common to do this by

[Problem to be solved by the invention]

However, the above conventional means has the following disadvantages.

In other words, in the case of mowers or those that use floor formwork, formwork supports are required to install the floor formwork, and the work of installing and removing the formwork support or demolding work must be performed. Not only did this work require professionals such as formwork carpenters, but it was also difficult to work under the floor. Furthermore, even in the case of the latter half-PC composite floorboards, installing the insulation material must be done under the floor, which is extremely difficult work. For this reason, the construction period and cost of conventional insulated floor construction have increased.

The present invention has been made in view of the above circumstances, and includes an insulating floor formwork that can be extremely easily constructed without requiring any special skills when forming an insulating floor, and the use of the same. The purpose of this invention is to provide a construction method for a heat-insulating floor.

[Means to solve the problem]

The heat insulating floor form of the present invention is a floor form for concrete pouring used when forming a concrete slab, which is integrally molded with a heat insulating material.

Furthermore, the method for constructing a heat insulating floor of the present invention is to construct a heat insulating floor having a heat insulating material on the lower surface of a concrete slab by erecting a plurality of precast concrete support beams in parallel between the beams at predetermined intervals. It is formed by laying a heat insulating floor form made of heat insulating material integrally between the beams, and then placing slab concrete with slab reinforcement placed on top of the heat insulating floor form. .

[Effect]

According to the heat insulating floor formwork described in item 1, the heat insulating material also serves as the formwork, so there is no need to separately construct the heat insulating material.

According to the method for constructing a heat insulating floor described in item 2, the heat insulating floor is formed by simply arranging slab reinforcement on the heat insulating floor formwork and placing slab concrete.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the shape of a heat insulating floor being constructed according to the method of constructing a heat insulating floor according to the present invention. In the figure, reference numeral I indicates the pillars of the building, and reference numeral 2 indicates the distance between the first and second pillars. It is a beam that is erected to form a floor. In order to form the desired heat insulating floor 6, the following steps are performed.

First, as shown in FIG. 1 and FIG. 2(a), between the beams 2 there are supported beams to, 10. ... are constructed in parallel at equal intervals.

The support beam 1O is made of precast concrete, and as shown in FIGS. 3 and 5, the support beam 10 is made of concrete body 11 with stepped portions 11a extending in the length direction on both sides in the width direction. , reinforcing reinforcing bars 13 and PC steel materials 16 are buried. The protruding part 12 forming the part above the stepped part 11a of the concrete body 11 is given a slight pitch so that its width becomes narrower toward the top.The reinforcing bars 13 are , an upper chord member 14a and two lower chord members 14b arranged in the length direction of the concrete body 11, and the upper and lower chord members 14a, 1
4b, and a rod-shaped reinforcement 16 provided between the two lower chord members 14b, and is constructed in the shape of a so-called assembled truss reinforcement. The upper chord member 14a protrudes from the upper end surface of the concrete body 11 (the upper end surface of the protruding portion 12) llb and is exposed to the outside, and a part of the lattice reinforcement 15 (near the apex portion) is also exposed to the outside of the concrete body 11. ing.

Moreover, the rod-shaped reinforcement 16 is connected to the protrusion 12 of the concrete body 11.
The protrusion 12 is arranged substantially horizontally in a wide part formed below the protrusion 12, and is sufficiently longer than the width of the protrusion 12. In this case, the Moeki PC* material 16 is an unbonded PCII wire, which is buried approximately in the center of the concrete body 11. The support beam 10 is prestressed by the PC11t416.

Once these support beams 10 are installed between the beams 2, a large number of heat insulating floor forms 3 are placed between these support beams 10 so that the frame is passed across without any gaps.

The heat insulating floor form 3 is as shown in FIG. 4, etc., and is formed from the heat insulating material itself. Any material can be used as long as it has sufficient strength to withstand the load of concrete poured on the top surface of the insulated floor form 3, as described below, and the loading load applied to the slab upon completion. I hope it's something. However, it goes without saying that the yield strength of the heat insulating floor form 3 is greatly influenced not only by its material but also by its cross-sectional shape. The heat insulating floor formwork 3 in this embodiment is made of polystyrene foam.
It is formed into a so-called thick flat plate shape, and is integrally molded using a mold. However, as shown in Figure 5,
The formwork end portion 3a placed directly on the support beam IO is formed with a step by slightly notching its lower part, and the stepped portion is formed on the surface of the concrete body 11 constituting the support beam IO. It is adapted to engage with the marking portion 11a.

This heat-insulating floor form 3 may be fixed with an adhesive after being placed on the support beam IO.

As described above, once a large number of heat insulating floor forms 3 are laid in a plane between the support beams 10, slab reinforcements 4 are then arranged on the tops of these heat insulating floor forms 3. The slab reinforcement 4 and its reinforcement work are similar to the conventional slab reinforcement arrangement on the upper part of the floor formwork.

When the slab reinforcement is completed, as shown in FIGS. 2 and 5, concrete C for forming a slab is cast on the upper surface of the heat insulating floor formwork 3 so as to bury the slab reinforcements 4.

Then, when the concrete C hardens and the slab 5 is formed, the intended heat insulating floor 6 is formed.

According to the construction method described above, the heat insulating floor 6 can be formed by simply placing slab reinforcement on the heat insulating floor form 3 and then constructing concrete. Therefore, it is possible to completely eliminate the work of assembling, dismantling, or removing the floor formwork and its support, which was required in conventional construction methods, and it is possible to save labor, shorten the construction period, and thereby reduce costs. be.

Furthermore, in the example, since the support beam IO has the above-mentioned structure, the protruding portions of the reinforcing bars 13, that is, the upper portions of the lattice bars 15 and the upper chord members 14 are inserted into the concrete C that is placed later. It is buried and functions as a dowel bar, thereby increasing the rigidity of the heat insulating floor 6. Also,
The concrete body 11 constituting the support beam 10 has a stepped portion 11a.
Since the protruding part 12 is formed through the support beam l and the protruding part 12 is formed with a taber, the insulating floor form 3 is attached to this support beam l.
When placed on the O, the frame end 3a of the heat insulating floor form 3 is guided by the taper of the protrusion 12, making the work extremely easy. Moreover, since the insulating floor form 3 has a stepped portion that engages with the stepped portion 11a, the insulating floor form 3
It can be set exactly at O, and positioning can be done easily. In addition, since it is possible to adjust the strength of the slab 5 by adjusting the reinforcement state of the slab reinforcements 4, for example, even if the required strength cannot be obtained in the insulation floor formwork 3, the amount of reinforcement of the slab reinforcements 4 can be increased. This makes it possible to obtain a heat insulating floor 6 having the required yield strength.

In the embodiment, the heat insulating floor form 3 is solid, but it may be hollow if sufficient yield strength can be obtained. In addition, precast concrete support beam 1
Regarding No. 0, in the embodiment, the protrusion 12 is tapered, but it may be formed on a vertical surface without forming a taper. Further, the shape of the assembled truss-like reinforcing bars 13 is not limited to the above example, and may be configured as shown in FIG. 7 or FIG. 8, for example. Although the PC steel material 16 is of an unbonded type in the embodiment, it may of course be a normal PClli material. Furthermore, if the support beams 10 are provided with support legs, for example, so that the bending stress and shear core force of the support beams 10 can be borne by other means, the PC steel material 16 or the PC1ltlt
16 and reinforcing bars 13 may not be provided.

〔Effect of the invention〕

As explained above, according to the heat insulating floor form according to the invention set forth in claim 1, the functions of both the heat insulating material and the formwork for slab concrete can be effectively exhibited, and the invention set forth in claim 2 can be realized if possible. At the same time, the required shape can be freely obtained by molding, and by appropriately selecting the shape and material, the required yield strength can be obtained.

Further, according to the method for constructing a heat insulating floor according to the invention as claimed in claim 2, the heat insulating floor can be formed by simply placing slab reinforcement on the heat insulating floor formwork and then constructing concrete, which is different from conventional construction methods. It is possible to completely eliminate the work of assembling, dismantling, demolishing, etc. of the floor formwork and its support, and eliminate the difficult sub-floor work, as well as eliminating the need for specialized staff for such work, which saves labor. It is possible to reduce costs by reducing construction time and construction time.

[Brief explanation of the drawing]

Figure 1 is a partial plan view showing the insulation floor under construction. Figure 2(a) shows 1i of the completed insulation floor in Figure 1.
The arrow view and FIG. 2(b) are the same <JJ arrow view. Figure 3 is a partial perspective view of the support beam. Figure 4 is an overall perspective view of the insulation floor formwork. Figure 5 is a partial side sectional view of the insulating floor. FIG. 6 is a plan view of FIG. 5. FIG. 7 and FIG. 8 are both partial perspective views showing other configuration examples of the reinforcing bars 13. 2...Beam, 3...Insulated floor formwork, 4...Slab reinforcement, 5.
...Slab, 6...Insulated floor,
10...Support beam, C...Concrete. Figure 1 Figure 2 (b) Figure 3 Figure 4

Claims (1)

[Scope of Claims] 1) A heat-insulating floor form formed integrally with a heat insulating material in a floor form for concrete pouring used when forming a concrete slab. 2) A method of constructing a heat insulating floor with a heat insulating material on the lower surface of a concrete slab, in which a plurality of precast concrete support beams are erected in parallel at predetermined intervals between the support beams, and a heat insulating material is installed between the support beams. A heat insulating floor is formed by laying a heat insulating floor form integrally molded with the heat insulating floor form, and then arranging slab reinforcements on the top of the heat insulating floor form and pouring slab concrete. How to install an insulated floor.