JP3611479B2 - Method for constructing concrete frame having heat insulating material for both formwork and structure provided with the concrete frame - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for constructing a concrete frame such as a concrete slab or a concrete wall and a structure provided with the concrete frame, and in particular, by substantially omitting the formwork before placing concrete, the construction efficiency is greatly increased. The present invention relates to a method for constructing a concrete frame having a form and heat insulating material that can be improved and a structure including the concrete frame.
[0002]
[Prior art]
In a reinforced concrete building, the construction of a concrete frame such as a concrete slab or concrete wall is usually done by laying a formwork in the horizontal or vertical direction, performing the necessary reinforcement, and placing the concrete in the formwork. This is done by placing and removing the formwork after the concrete has hardened. Depending on the type of the concrete frame part to be constructed, a plate-shaped synthetic resin foam may be attached to the concrete wall as a heat insulating material.
[0003]
Since it is labor intensive to perform formwork construction and pasting of heat insulation material, as a construction method for heat insulation material for formwork in a concrete frame designed to do it at the same time, many methods are used at narrow intervals on the large pull. Lay the book joist, place a mold and heat insulator on it, fix the nail and heat insulator to the horizontal rail using fixing tools such as nails, and then place concrete on it. There has also been proposed a construction method (see Japanese Patent Application Laid-Open No. 7-90950). After the construction, support members such as joists and overdrawing are removed, and the mold and heat insulating material is integrated with the concrete and left on the frame side.
[0004]
[Problems to be solved by the invention]
The method for constructing a mold and heat insulating material described in JP-A-7-90950 does not use a horizontal mold as in the prior art. There is an advantage that the work for removing the formwork can be labor-saving, and the work such as processing of the plywood for the formwork that has become a waste material becomes unnecessary. However, it is necessary to place a large number of joists at narrow intervals on the large pull to support the heat insulating material for the formwork, and nail or special fixing for positioning and fixing the heat insulating material for the formwork It is necessary to prepare a metal fitting and hit it on the housing side for each individual formwork / heat insulating material.
[0005]
An object of the present invention is to further improve the conventionally proposed method for constructing a concrete casing as described above. More specifically, the mounting work of a support member that supports a formwork and heat insulating material is greatly improved. To provide a method of constructing a concrete frame having a formwork and heat insulating material that can save labor, facilitate positioning and fixing of the formwork and heat insulating material during construction, and a concrete structure having such a concrete structure. It is in.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, the method of constructing a concrete frame having a formwork and heat insulating material according to the present invention basically erected support columns at a required interval, and horizontally supported a support member on the support columns. If necessary, a flat plate is placed on the support member, and a mold / heat insulating material having a reinforcing material attached to the back surface is spread while being supported by the support member or the flat plate placed if necessary. After positioning and fixing a part or all of the periphery of the frame / heat insulating material with a fixing rod member fastened to the housing side, if necessary, reinforcing bars are placed and concrete is placed. .
[0007]
Further, the structure provided with the concrete frame according to the present invention has a top surface and four side surfaces in a state in which the fixing material for the formwork combined with the reinforcing material on the back surface is disposed on a part or all of the periphery thereof. Is provided with a concrete casing having at least a structure covered with cast concrete.
As the formwork and heat insulating material, any material can be used as long as it is lightweight and is not deformed by the cast concrete, but a synthetic resin foam such as expanded polystyrene is most preferably used. As the synthetic resin foam, a synthetic resin foam made of ethylene resin, propylene resin, or the like can be used.
[0008]
According to the construction method of the present invention, the mold-use heat insulating material is provided with a reinforcing material on the back surface side, and the support member or a flat plate arranged as necessary only supports the mold-form heat insulating material directly from the lower surface, It can withstand various loads during construction. Therefore, as in the conventional method, it is possible to omit the work of laying a large number of joists at narrow intervals on the large pull for supporting the mold and heat insulator, and the mold and heat insulator is arranged. Work is greatly saved.
[0009]
Furthermore, the positioning and fixing of the spread sheet-form heat insulating material is performed by disposing a fixing bar member on a part or all of the periphery thereof and fixing the fixing bar member to the housing side by nailing or the like. . By using a fixing rod member that is a long member, it is possible to perform positioning and fixing at the same time for a large number of mold frame and heat insulating materials, compared to the case of nail fixing every sheet, Positioning work is greatly labor-saving.
[0010]
In the present invention, the material, arrangement, number of attachments, etc. of the reinforcing material to be attached to the back surface of the mold / heat insulating material are the original functions as the load load planned at the time of construction of the concrete frame and the heat insulating material used for the mold What is necessary is just to design in accordance with the construction site on condition that (light weight etc.) is not lost. As a raw material, a wood material such as wood, synthetic wood or processed wood material, a synthetic resin material such as FRP, a lightweight metal material such as aluminum, or the like can be used. The reinforcing material is preferably arranged at regular intervals over the entire length in the longitudinal direction on the back surface side of the heat-insulating material for the formwork, that is, the side in contact with the support member, but may also be arranged on the front surface side. .
[0011]
The above construction method according to the present invention can be applied to the construction of a concrete frame portion having an arbitrary shape, such as a concrete wall, a concrete slab having a flat back surface, or a concrete slab having a beam whose height is higher than the slab thickness. When constructing a concrete slab with a beam whose height is higher than the thickness of the slab, it is also used as a plurality of formwork with the reinforcing material attached in the space between the lower surface of the beam and the lower surface of the slab. The heat insulating material is spread horizontally so that the lower end surface level is the same level as the lower surface of the beam.
[0012]
In this construction mode, the lateral width of the beam portion is regulated by the side surface of the mold and heat insulating material which is a lightweight filler. This eliminates the need for a conventional grooved formwork, which is a beam formwork that has been required in the past. If necessary, a flat plate material such as plywood is placed on the bottom face of the beam. The concrete placement space of a desired shape can be obtained simply by laying down horizontally. After laying a plurality of formwork and heat insulation materials, if necessary, place reinforcement and place concrete. At that time, a spacer may be disposed between the formwork combined heat insulating material and the rebar arrangement so that the reinforcement does not contact the formwork combined heat insulating material.
[0013]
In the present invention, the mold and heat insulating material is positioned and fixed in a state of being surrounded by a fixing bar member that is fixed to the housing side, so that the mold and heat insulating material is positioned when placing concrete. No inconvenience is caused, and inconveniences such as the flow of concrete pouring from the gap between the mold and heat insulating material are avoided.
After curing concrete for several weeks, wait for the strength of the concrete to develop, remove the pillars, supporting members and flat plates arranged as necessary, the construction of the concrete frame according to the present invention is finished, the concrete frame according to the present invention A structure with is constructed. Even if the support member is removed, the form-cum-heat insulating material and the fixing bar member arranged around the heat-insulating material are stably held by the adhesive force with the concrete.
[0014]
When the concrete frame part to be constructed is a concrete slab, the ceiling material can be attached using the reinforcing material attached to the back surface as the lower ground for ceiling finishing, and a flat ceiling surface can be easily constructed Can do. It is also possible to attach a suspended ceiling to the lower surface of the concrete slab via a hanging bolt, etc. In this case, the space between the lower surface of the concrete slab and the ceiling material can be easily used as a space for wiring or piping. be able to.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, some embodiments of a method for constructing a concrete frame having a form and heat insulating material according to the present invention and a structure will be described mainly by using a concrete slab as an example with reference to the drawings.
FIG. 1 shows an example of a mold / heat insulating material 10, and a synthetic resin foam such as an in-mold foam molded product of polystyrene foam or an extruded foam is preferably used as a base material, and FRP resin or A required number (four in the illustrated example) of reinforcing members 11 made of a wood material is attached. The reinforcing material may be integrally formed at the time of forming the mold / heat insulating material, or may be attached by embedding after the forming.
[0016]
A method of constructing a concrete slab using the mold / heat insulating material 10 shown in FIG. 1 will be described with reference to FIGS. 2, 3, and 4. First, the pillars 1 are erected at a predetermined interval in the entire region of the lower surface of the concrete slab 50 of the building, and an appropriate horizontal support member 2 such as a large pull is installed on the pillars 1. As shown in FIGS. 3 and 4, the position where the beam 20 is to be formed is a place where the formwork and heat insulating material 10 is not disposed, and a flat plate 21 having a width somewhat larger than the width of the beam 20 is spread over the portion. . Furthermore, the flat formwork 22 is spread also in the part which wants to make the structure which does not embed the heat insulating material 10 for mold forms like the part which requires a high floor space. Moreover, although not essential, the flat plate 23 may be spread over the support member 2 at the place where the mold / heat insulating material 10 is disposed.
[0017]
As can be seen from FIG. 3, both side edges of the position to be the beam 1, one side edge of a portion where the structure / heat insulating material 10 is not embedded, etc. The side edges of the four circumferences are locations to be positioned. Therefore, the long fixing rod member 30 is driven and fixed to the horizontal support member 2 with a nail or the like along the position to be positioned.
[0018]
FIG. 2 shows such a state. A first fixing rod member 30 is fixed by hitting it with a nail or the like in the longitudinal direction of the flat plate 21 placed on the support member 2. A second fixing rod member 30 (not shown) is driven and fixed to the support member 2 with a nail or the like in a direction orthogonal to the fixing rod member 30. As a result, the positions of the two orthogonal side edges of the large number of mold and heat insulating materials 10 to be spread are determined, so that the side edges are brought into close contact with the fixed first and second fixing rod members 30 and 30. In this manner, the required number of mold / heat insulating materials 10 are sequentially laid out so as to form a square shape as a whole.
[0019]
After that, a large number of sheet-form and heat-insulating materials 10 are pressed in two directions so as to be in close contact with each other, and in close contact with the other two (opposite) side edges, 3. The fourth fixing rod members 30 and 30 (not shown) are driven and fixed to the support member 2. As a result, a large number of mold-form and heat-insulating materials 10 spread in a square shape are positioned and fixed by the fixing rod member 30 with the four side edges thereof being in close contact with each other. Will not cause.
After that, as shown in FIG. The number and arrangement form of the slab reinforcement 5 may be the same as the slab reinforcement in the case of the conventional method. However, in this example, the spacers 6 are placed on the mold / heat insulating material 10 in order to arrange the slab muscles 5 at regular intervals and to ensure a constant fogging.
[0020]
After finishing the bar arrangement work, the concrete 51 is placed in the same manner as in the conventional method. The mold / heat insulating materials 10 are fixed in close contact with each other, so that the placed concrete nose does not leak from the gap. By forming the joint engagement portion around the mold / heat insulating material 10, leakage of the slot can be more reliably prevented.
The concrete is cured for 3 to 4 weeks, waits for the strength of the concrete to develop, confirms that the predetermined strength has been obtained, and removes the support column 1, the support member 2, the flat plates 21, 22, 23 and the like. If necessary, the tip of the nail used for driving the fixing rod member 30 is cut on the same surface of the slab as necessary. When a headless nail is used, the whole can be pulled out. As a result, the construction of the concrete slab is completed, and a concrete slab 50 in which the placed concrete 51 and the formwork and heat insulating material 10 are integrated is obtained, and a structure including the concrete slab according to the present invention is constructed. .
[0021]
In the construction method according to the present invention, as shown in the drawing, all construction is performed only by arranging the flat plates 21, 22, and 23 only on the lower surface of the place where the mold / heat insulating material 10 is not disposed, such as the position to be a beam. And formwork is greatly simplified. Further, in the construction method of the present invention, the mold and heat insulating material is a lightweight material, and the use of the mold and heat insulating material does not change the design weight of the building. Therefore, the strength design of the concrete slab can be performed in the same manner as in the conventional method. Moreover, the heat insulating material for molds also has a function as a heat insulating material, and it is possible to omit a part of the heat insulating work performed in a cold district.
[0022]
【The invention's effect】
As described above, according to the present invention, the construction of the concrete frame can be greatly simplified without any influence on the strength of the concrete frame such as the concrete slab after the construction, and the working time can be shortened. Can be achieved. In particular, the beam formwork and flat formwork are not used as in the past, so it is not necessary to secure, store, and dispose of the plate material such as plywood. Is possible.
Furthermore, in the structure provided with the concrete frame by the method for constructing the concrete frame of the present invention, in addition to the ease of construction, the heat insulating material for the formwork also has a function as a heat insulating material. You will get a construct.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of a mold and heat insulating material used in the present invention.
FIG. 2 is a perspective view for explaining a concrete frame construction method according to the present invention.
FIG. 3 is a cross-sectional view illustrating a method for constructing a concrete frame according to the present invention.
FIG. 4 is a cross-sectional view of an essential part for explaining a concrete frame construction method according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Support | pillar, 2 ... Support member, 5 ... Slab reinforcement, 10 ... Insulation material used as a formwork, 11 ... Reinforcement material, 21, 22, 23 ... Flat plate, 30 ... Fixing bar member, 50 ... Concrete slab, 51 ... Strike Concrete

Claims (3)

A form-cum-use heat insulating material in which struts are erected at a required interval, a support member is horizontally mounted on the strut, and a reinforcing material is attached at regular intervals over the entire length in the longitudinal direction on the side in contact with the support member on the back side. After placing the reinforcing material so that both ends of the reinforcing material are supported by the supporting member, and surrounding and fixing a part or all of the periphery of the laid-down formwork and heat insulating material with a fixing rod member fixed to the housing side A method for constructing a concrete frame having a heat insulating material for both a formwork, characterized by placing reinforcement and placing concrete when necessary. In the construction method of the concrete frame having the formwork combined heat insulating material according to claim 1, the place on the support member where the formwork combined heat insulating material to be a beam after the construction is not disposed is larger than the width of the beam. 2. The mold / heat insulating material according to claim 1, wherein a step of laying a flat plate having a somewhat wider width is performed, and then the mold / heat insulating material is spread while being supported by the support member and the flat plate. Construction method of concrete frame. 3. The method for constructing a concrete frame having a form and heat insulating material according to claim 1 or 2, wherein the concrete frame is a concrete slab.

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