KR101489140B1 - Double form for waffle type slab - Google Patents

Abstract

The present invention relates to a double form of a waffle type having advantages of a hollow light body of a hollow slab and a waffle type form of a waffle slab. The double form of a waffle type includes a light waffle form directly installed on an upper portion of a slab form and attached to a slab concrete layer placed thereon. The light waffle form has a plurality of protrusions spaced apart and protruding from the slab concrete layer at a given interval, and the protrusion are formed integrally with the light waffle form. The double form further includes a plurality of waffle type forms positioned below the protrusions and having a shape corresponding to the shape of the protrusion; and a plurality of support members for supporting the bottom surface of the protrusions. The weight of the slab can be reduced by the light waffle form attached to the slab concrete layer. When the concrete is placed, since the form is placed below the concrete layer and is temporarily installed in the slab form, there is no concern in that the form is lifted by buoyancy under construction, like the hollow light body of the conventional hollow slab. Since the size and interval of the protrusions are adjusted, the steel bars are easily installed, and the waffle shape is exposed outwardly, the lightweight is obtained and the likeable ceiling surface is shown.

Description

{DOUBLE FORM FOR WAFFLE TYPE SLAB}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slab formwork, and more particularly, to a waffle type double formwork which can have both the advantages of a hollow lightweight body of a hollow slab and a waffle formwork of a waffle slab.

Generally, a slab is a plate-like building structure installed between columns. In the case of a ramen structure such as a reinforced concrete structure or a steel-reinforced concrete structure, a load applied to a slab is a beam, a girder, or the like To the support member of the apparatus.

In the case of reinforced concrete structures with such a ramen structure, each unit slab is divided by beams and the thickness of the slab is thinned to attempt to reduce the weight. However, support members such as girders and girders for receiving the load applied to the slabs are necessarily required The height of the girder or the girder is increased, so that the height of the girder is increased. As a result, the height of the entire reinforced concrete structure is limited by the limitation of the slope of the building method. Therefore, a deep culvert is required, there was.

Therefore, a flat plate or flat slab structure without a girder or girder has been proposed in order to solve the problem that the height of the floors is increased along the height of the girder or girder. Since the flat slab structure does not require a girder or a girder, the height of the slab is advantageously reduced. However, since the slab itself has to bear a certain amount of load instead of omitting the beams, the weight of the slab itself is increased. There is a problem that the magnitude of columns and bases to bear the load transmitted from the slab is increased, the seismic load is increased, the size of the member to the lateral force component increases, and the self weight increases, .

In order to solve such a problem of the flat slab, it is necessary to increase the strength of the slab by increasing the thickness of the slab, to secure a spacious living space of the building, or to provide a hollow structure Various methods have been put into practical use.

Such a hollow core slab is a structure having a hollow body or a lightweight body at the center, which reduces the weight of the panel and reduces the weight of the slab and has a relatively excellent sectional performance. Such a hollow slab has a long span The advantage of the flatslab is that it has the advantage of reducing the interlayer noise and solving the long-term deflection.

However, in the case of the hollow slab, the buoyant force of the lightweight body to float over the surface of the concrete is strong due to the difference in density between the lightweight body and the concrete at the time of pouring the concrete, and the hollow slab is liable to be defective .

As an alternative to such hollow slabs, waffle type slabs have been proposed. In the hollow slabs, hollow wafers are embedded in slabs. On the other hand, waffle slabs can be expected to be lightweight without wasting their own weight as waffle forms are exposed to the outside, .

However, the conventional waffle plate slabs, as shown in Fig. 1, are generally required to be formed at intervals of about 600 to 1,500 mm in the ribs of the waffles, and since the ribs must be arranged at regular intervals, The spacing of the reinforcing bars disposed at the lower portion of the ribs is affected by the spacing of the ribs, so that it is not easy to arrange the reinforcing bars as compared with the hollow slabs using the hollow lightweight bodies. It is difficult to make the dance of the hollow slab as small as that of the hollow slab.

Also, the waffle type slab of the related art has a disadvantage that the disassembly is not easy due to the adhesion force between the waffle form and the concrete placed on the slab, so that it takes a lot of cost and manpower to disassemble.

Korean Patent Laid-Open No. 10-2003-0061254

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made in view of the above problems, and it is an object of the present invention to reduce the weight of a slab, It is an object of the present invention to provide a waffle-type double formwork having advantages of a hollow slab and advantages of a waffle slab so that a ceiling can be used.

It is another object of the present invention to provide a waffle-type double die that does not require dismantling of a waffle type die or is easy to disassemble.

In order to achieve the above-mentioned object, the waffle type double formwork according to the present invention includes a lightweight waffle foam integrally attached to a slab concrete layer placed on an upper part of the slab formwork, The sieve-shaped foam layer is formed by protruding at a predetermined distance from the slab concrete layer and includes a plurality of protrusions integrally formed with the lightweight waffle foam.

Here, the lightweight waffle foam may have a plurality of concave-convex forms at a lower portion of the plurality of protrusions, the foam having a shape corresponding to the shape of the protrusions.

The lightweight waffle foam may be made of a foamed material, and the protrusion may have a dome shape or a trapezoidal shape.

Further, the image forming apparatus further comprises a plurality of support members for supporting the lower surface of the projecting portion.

Here, the support member is formed to open the lower surface and is formed in a shape corresponding to the shape of the concavo-convex foam, and is installed on the upper surface of the slab formwork.

Here, the lightweight waffle foam is made of a lightweight EPS panel or a heat insulating material having a heat insulating function, and the support member is made of a metal material or a plastic material so as to prevent damage to the lightweight waffle foam.

Here, the support member has a through-hole at the center of the upper surface, through which air can be injected to facilitate demolding of the lightweight waffle foam during demolding.

In addition, the waffle type double formwork according to the present invention includes a foam frame, which is disposed in contact with the upper surface of the slab formwork and is demolded after curing of the slab concrete layer, a slab concrete layer placed on the upper part, And a bottom surface of the bottom surface of the base plate.

Here, the foam frame is formed of a metal material or a plastic material, and the shim member is formed of a rubber material or EPS or EPP to facilitate demoulding after slab concrete curing.

Here, a through hole is formed at the center of the upper surface of the dome-shaped portion, and a plurality of insertion protrusions are formed around the through hole to be inserted into the fitting member.

According to the waffle type double formwork of the present invention having the above-described structure, the weight of the slab can be reduced by the lightweight waffle foam which is attached to the upper part of the slab formwork and attached to the slab concrete layer placed on the upper part, Since it is disposed at the lower part of the concrete layer at the time of pouring concrete and is temporarily installed in the slab formwork, it can be stably installed without fear of float due to buoyancy during construction as in the conventional hollow slab hollow hollow body.

In addition, by adjusting the size and spacing of the protrusions integrally formed with the lightweight waffle foam, it is possible to easily place the reinforcing bars and to expose the waffle shape to the outside. As a result, weight reduction can be expected without increasing the self weight. have.

In addition, the lightweight waffle foam can be used as a formwork during the formwork installation and reinforcement, and the weight of the slab can be reduced as a component of the slab after the slab concrete is poured.

In addition, by forming the concavo-convex foam and the supporting member on the lightweight waffle foam, it is possible to reduce the thickness of the material necessary for securing the rigidity of the waffle foam, thereby reducing the material cost for the lightweight waffle foam, Can be achieved.

According to another embodiment of the waffle type double die of the present invention, since the foam frame having a plurality of dome shapes is provided with the sandwiching member with the slab concrete layer, the foam frame constitutes the waffle slab, Because it is not attached to concrete, it is very easy to dismantle the form, so it can save time and cost for dismantling, and it can reuse the foam frame, which can reduce the cost of construction as well as reduce the generation of waste materials and have an eco-friendly effect.

1 is a view showing a waffle slab according to the prior art.
2 is a view illustrating a double die according to an embodiment of the present invention.
3 is a view showing a double die according to another embodiment of the present invention.
Fig. 4 is a view for explaining the provision of a plurality of double molds shown in Figs. 2 and 3. Fig.
5 is a view showing a double die according to another embodiment of the present invention.
6 is a view showing the form frame of Fig.
7 is a plan view of the foam frame of Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a waffle type double die according to the present invention will be described in detail with reference to the accompanying drawings.

≪ Example 1 >

Figure 2 is a view of a double die of a waffle type according to one embodiment of the present invention.

As shown in FIG. 2, the double mold according to this embodiment is mounted on the upper side of the slab formwork 3 and is configured to be separated from the slab formwork after the slab concrete is cured, 1).

As described later, the slab form 3 functions as a hollow body for reducing the weight of the slab, and functions as a mold during the installation of the slab and the reinforcement of the slab. Therefore, it is desirable that the slab formwork does not directly contact the concrete, thereby increasing the number of times of reuse and reducing the construction cost.

Further, the lightweight waffle foam composed of the heat insulating material is integrally retained in a state of being attached to the slab concrete layer without demolding, so as to have a function as a heat insulating material.

The lightweight waffle foam 1 is made of, for example, styrofoam, and is disposed on the upper surface of the slab formwork. After the slab concrete is placed, a slab concrete layer 2.

The lightweight waffle foam 1 can be installed on the upper surface of the slab former without a separate fixing member by disposing a plurality of double molds which are unitized or modularized with a certain standard.

The lower surface of the lightweight waffle foam 1 is formed to abut the slab formwork, and a plurality of protrusions 10 are formed on the upper surface of the lightweight waffle foam 1.

The protruding portion 10 is integrally formed of the same material as the lightweight waffle foam and protruded from the slab concrete layer. Further, a plurality of protrusions are formed with a predetermined spacing.

Here, the protrusion 10 may be formed in a dome shape similar to a waffle dome shape of a conventional waffle die, or may be formed in a trapezoidal cube shape of a downside light.

The lightweight waffle foam 1 can be manufactured by adjusting the size and arrangement interval of the protrusions when necessary in the factory, for example, by adjusting the arrangement interval of the protrusions to 200 to 300 mm, The spacing of the reinforcing bars 2a, 2b, 2c disposed on the upper portion of the waffle foam can be freely arranged without being disturbed by the projecting portions.

Thus, the lightweight waffle foam 1 having the protruding portion 10 can function as a hollow lightweight body of a conventional hollow slab and function as a waffle form of a conventional waffle slab.

As shown in Fig. 4, the lightweight waffle foam 1 has a structure in which a plurality of lightweight waffle foams 1 are disposed adjacent to an upper portion of the slab form 3, Tape 4 or the like, and reinforcing steel is placed on the upper part thereof, and then slab concrete is laid.

Thus, in the conventional hollow slab, since the hollow lightweight body is embedded in the slab, a separate device is required to prevent floating of the hollow lightweight body due to buoyancy by the concrete when the slab concrete is poured. However, , The lightweight waffle foam functions as a hollow lightweight body and is disposed at the lower portion of the slab concrete layer. Therefore, there is no fear of injury due to buoyancy, and a separate device for preventing buoyancy is not necessary. have.

Then, when the slab concrete is hardened, the slab formwork 3 is demolded. At this time, since the lightweight waffle foam 1 is firmly attached to the slab concrete layer by an adhesive force with concrete, there is no fear that the slab concrete layer is separated from the slab concrete layer or demoulded by demolding of the slab formwork.

≪ Example 2 >

3 is a view showing a double die according to a second embodiment of the present invention.

In the present embodiment, the same reference numerals are given to the same constituent elements as those in Embodiment 1, and a duplicate description will be omitted.

As shown in FIG. 3, the double die according to the present embodiment is different from the double die of the first embodiment in that the double die has a concave-convex form and a support member formed in a hollow shape.

In this embodiment, the lightweight waffle foam need not have the same thickness as that of the lightweight waffle foam of the first embodiment, but may have a thickness thinner than that of the lightweight waffle foam of the first embodiment. For example, An EPS panel or a heat insulating material.

The lightweight waffle foam 1 of the double form according to the present embodiment has the concave-convex form 20 formed at the bottom of the plurality of projections.

By providing the concave-convex form 20, it is possible to reduce consumption of materials such as styrofoam, which is required for manufacturing a lightweight waffle foam, while achieving the same hollow rate and weight reduction of the slab as the lightweight waffle foam of the first embodiment .

The lightweight waffle foam is configured to have a shape corresponding to the shape of the protrusion. That is, the shape of the concavo-convex form may be formed into a dome shape corresponding to the shape of the protruding portion, and a hollow portion having a trapezoidal cube shape of opposed light.

On the other hand, since the lightweight waffle foam of the lightweight waffle foam is likely to be broken at the time of work such as reinforcement placement, facility piping, or concrete pouring at the upper portion of the lightweight waffle foam, It is preferable that the support member 30 be provided.

The support member 30 is disposed on the foam in the concavo-convex form and is arranged to abut the lower surface of the protrusion to support the protrusion.

It is preferable that the support member 30 is configured to have a shape corresponding to the shape of the concavo-convex foam, and the lower surface is formed to be open. Also, the support member 30 can be reused after separating the support member from the lightweight waffle foam after demolishing the slab concrete after curing of the slab concrete layer.

It is preferable that the support member 30 is made of a rigid material such as a steel material, an aluminum material or a plastic material, or a plastic material, so as to prevent breakage of the lightweight waffle foam.

A through hole 31 is formed at the center of the upper surface of the support member 30 so that air is injected through the through hole when the support member is separated from the lightweight waffle foam, And is easily separated from the waffle foam.

The support member may be installed at a predetermined position on the slab formwork by fixing means such as a nail or the like. However, by inserting the protrusion into the groove of the lightweight waffle foam before installing the lightweight waffle foam, By arranging the lightweight waffle foam, which is previously fastened to the member, in the slab formwork.

Thus, the double mold according to the present embodiment can achieve the same effect as the double mold of the first embodiment while reducing the material such as styrofoam.

≪ Example 3 >

5 to 7 are views showing a third embodiment of the present invention.

In the present embodiment, the same reference numerals are given to the same constituent elements as those in Embodiment 1, and a duplicate description will be omitted.

The double mold according to this embodiment is different from the double molds of Embodiments 1 and 2 in that it has a form frame 40 and a fitting member 50.

The foam frame 40 is mounted against the upper surface of the slab formwork. The foam frame 40 has a lower surface 43 abutting against the upper surface of the slab formwork, a wall portion 42 and an upper surface 41, Like shape, that is, a dome shape or a trapezoidal cube with a collimated light.

The upper surface is spaced apart from the slab mold by a predetermined distance, and the wall portion extends downward from the upper surface to form a dome-shaped portion, wherein a plurality of the dome-shaped portions are spaced apart from each other by a predetermined distance.

The foam frame 40 is installed on the upper surface of the slab formwork 3 and is configured to be demolded together with the slab formwork after curing of the slab concrete layer.

Here, the foam frame 40 is formed of a metal material or a plastic material and has a predetermined rigidity.

In the foam frame 40, a through hole 44 is formed at the center of the upper surface. When the foam frame is separated from the slab concrete layer, air is injected through the through hole, .

A plurality of insertion protrusions 46 are formed around the through-holes of the foam frame, insertion grooves corresponding to the insertion members to be described later are formed, and by inserting the insertion protrusions into the insertion grooves, So that the engagement with the shim member can be achieved stably and easily.

On the other hand, a fitting member 50 is provided on the upper part of the foam frame. Preferably, the shim member is configured to cover the upper surface, the wall, and the lower surface, and is configured to have a thickness thinner than the thickness of the foam frame.

In addition, the shim member is formed of, for example, a rubber material or EPS or EPP, and is configured to easily demold the concrete after hardening the slab concrete placed on the top.

Thus, while the waffle slab is formed by the foam frame to reduce its own weight, the foam frame, which is disposed between the slab concrete layer and the foam frame and adheres to the slab concrete layer, does not adhere to the slab concrete It is possible to easily disassemble the foam frame from the slab concrete layer after curing of the slab concrete, thereby reducing the time and cost required for disassembly.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to be exemplary and explanatory only and are not to be construed as limiting the scope of the invention as defined by the appended claims. All of which are included in the technical idea of the present invention.

1: Lightweight waffle foam
10:
20: Form of uneven form
30: Support member
40: foam frame
50:

Claims (10)

And a lightweight waffle foam which is integrally attached to a slab concrete layer installed on the upper part of the slab formwork,
The lightweight waffle foam
A plurality of protrusions protruding from the slab concrete layer at a predetermined distance and formed integrally with the lightweight waffle foam;
A plurality of projections and depressions in the form of a shape corresponding to the shape of the protrusions,
A supporting member formed on the upper surface of the slab former and having a shape corresponding to the shape of the concavo-convex form,
Wherein the waffle type double die is provided with a waffle type double die.
delete delete delete delete The method according to claim 1,
The lightweight waffle foam is made of an EPS panel or a heat insulating material having a light weight and having a heat insulating function,
Wherein the support member is made of a metal material or a plastic material to prevent damage to the lightweight waffle foam.
The method according to claim 1,
Wherein the support member has a through hole at the center of the upper surface for injecting air to facilitate demolding of the lightweight waffle foam at the time of demolding.






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