JPH08177057A - Form for concrete foundation, and construction of concrete foundation therewith - Google Patents

Abstract

PURPOSE: To improve the efficiency in execution of work by a method wherein a pair of side forms made of foamed resin moldings are erected at a specified interval, and the lower ends of the forms are fitted into fitting grooves on a fixing member while the upper ends thereof are held with separators interposed in between. CONSTITUTION: Side wall fixing members 7 are arranged at specified intervals on leveling concrete and after bar arrangement is made, the lower ends of an outer side form 2a and an inner side form 2b, both of which are made of foamed resin, are fitted into fitting grooves 9 of each of the fixing members, and the side forms 2a and 2b are erected therewith. Then, separators 6 are interposed between the side forms 2a and 2b and a space 5 is ensured for placement of concrete. After the space 5 is filled with concrete and the concrete is hardened, a concrete foundation is made up. The surfaces of the footing part 3 and the rise part 4 of the concrete are covered with the side forms 2a and 2b, and the concrete foundation and the foamed resin moldings are united together. As the form fixing members are hardly broken, bar arrangement can be executed easily, and movement and deformation of the forms can be prevented while correctness can be ensured for placement of the forms.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a method for constructing a concrete foundation and a concrete formwork used therein.
More specifically, the present invention relates to a method for easily constructing a concrete foundation in which a heat insulating material made of a resin foam is arranged on the outer periphery, and a concrete form made of a resin foam molded body used in this method.

[0002]

BACKGROUND OF THE INVENTION In a building constructed in recent years, a more comfortable living space is formed by surrounding the building with a heat insulating material such as a resin foam plate, and by surrounding the building with a heat insulating material. Improves cooling / heating efficiency.

Conventionally, in such an insulating building,
Insulation materials are often placed under walls, roofs and under floors so as to surround a living space, and it is not common to lay the insulation material up to the foundation of a building.

However, the foundation structure of a building is usually formed of concrete, and such concrete has thermal conductivity, and therefore the amount of heat energy released through such concrete foundation is considerable over the year. Amount. In recent years, attempts have been made to operate heat energy more efficiently by arranging a heat storage body in the underfloor space and storing cold heat using the heat storage body.

Under these circumstances, a heat insulating material is gradually arranged on the concrete foundation to separate the heat from the outside air. Conventionally, when surrounding a concrete foundation with a heat insulating material, a heat insulating material such as resin foam is attached to the surface of the foundation constructed by placing concrete in the mold and removing the mold after the concrete hardens. However, such a method has a problem that workability is low and a gap is easily formed in a butted portion of the heat insulating material.

Therefore, in order to easily dispose a heat insulating material made of a resin foam on the surface of the concrete foundation, for example, Japanese Patent Laid-Open No.
No. 41981 discloses a method for constructing a concrete foundation using a non-demolding concrete formwork made of a synthetic resin foam for constructing the concrete foundation. In this construction method, as shown in FIG. 8, a foamed resin mold having the same shape is used, and this mold is composed of an outer mold 54 and an outer mold 55 which are symmetrically arranged side by side. It is configured. The outer mold 54 and the inner mold 55 each include an upper vertical frame 56 and a lower enlarged bottom frame 57. Ribs 58, 58, 59 are provided between the outer mold 54 and the inner mold 55, and both ends contact the inner wall surfaces 60 of the outer mold 54 and the inner mold 55 to form the outer mold. A gap 59 for placing concrete is formed between the frame 54 and the inner mold 55.

However, in the conventional method of constructing a concrete foundation using a non-deformable formwork as described above, the outer formwork 54 and the inner formwork 55 are arranged directly on the discarded concrete or rubble, and The ribs 58 contacting the inner wall surface 60 of the upper vertical frame 56 and the lower enlarged bottom frame (futin part) 57 with a space 62 between the outer mold 54 and the inner mold 55,
It is only secured by 58, 59. After the reinforcing bars (not shown) are applied to the gaps formed as described above, concrete is poured from above, but as shown in FIG. 8, ribs 58, 58, 59 made of synthetic resin are used. The ribs 58, 58, 59 are likely to be damaged when placing concrete only by disposing the ribs. In particular, the ribs 5 provided on the enlarged bottom frame 57
Since 9 is long, the rib 59 is damaged during concrete pouring, or moves due to the concrete pouring pressure, causing a problem that the gap of the enlarged bottom frame 57 cannot be kept constant. Further, although the reinforcements are arranged in the gap 62, the lower end portions 61, 61 of the outer mold 54 and the inner mold 55 are not fixed, so that the work of the reinforcement is very complicated and There is also a problem that the ribs 59 are easily damaged when streaking.

[0008]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a non-deformable mold type concrete foundation form made of a resin foam molding and a method of constructing a concrete foundation using such a concrete foundation form. There is.

Further, the present invention provides a mold for a concrete base of a non-deformation type which has excellent heat insulating property and is easy to arrange a bar and a form made of this resin foam molding without demolding the concrete foundation. It is an object of the present invention to provide a method for forming a heat insulating concrete foundation in which a resin foam molding is integrated.

[0010]

SUMMARY OF THE INVENTION According to the method of the present invention, at least one of the two side molds is erected at the lower end of a side mold of a concrete foundation formed of a resin foam molding. To be inserted into the fitting groove formed in the side surface form fixing member as described above, and the separator is arranged so that a concrete pouring space is formed in the vicinity of the upper ends of the two side surface form frames, Next, concrete is poured into the gap formed by the two side molds to construct a concrete foundation in which at least one surface of the outer periphery of the concrete foundation is surrounded by a resin foam molding.

In the method of constructing a concrete foundation of the present invention, two side molds of the concrete foundation, at least one of which is formed of a resin foam molding, and the two side molds form a predetermined space. Side formwork fixing member having two fitting grooves in which the lower ends are fitted so as to stand upright, and concrete pouring between the two sidework forms near the upper ends of the two sidework forms. A concrete foundation formwork having a separator forming an installable gap is used.

In the method of the present invention, since the lower ends of the inner side surface mold and the outer side surface mold are fitted into the fitting grooves formed in the side surface mold fixing member, the bar arrangement can be easily arranged. Moreover, since the side surface form fixing member is arranged so that the lower end portion of the side surface form fitting is inserted, the side surface form fixing member will not be damaged during the bar arrangement. Further, since the lower end portion of the side surface form is fitted and fixed in the fitting groove of the side surface form fixing member, the side surface formwork does not move even when the concrete is cast.

Further, the side-face form fixing member acts as a positioning member for the side-face form, and after the side-face form fixing member is laid in advance, the resin foam molding is fitted into the fitting groove formed in the lake bottom member. It is possible to install a formwork for pouring concrete by inserting the side formwork, and then incorporating a separator near the upper end of the side formwork.

[0014]

DETAILED DESCRIPTION OF THE INVENTION Next, the concrete foundation construction method of the present invention and the formwork used in this method will be described more specifically with reference to examples.

FIG. 1 is a perspective view showing a concrete foundation formwork of this embodiment, FIG. 2 is a front view of the concrete foundation formwork of the embodiment, and FIG. 3 is a sectional view taken along line AA in FIG. It is a figure.

As shown in FIGS. 1, 2 and 3, the concrete foundation formwork 1 of this embodiment is for forming a cloth foundation or the like in, for example, a wooden construction. At least one of the two side molds of the concrete foundation mold 1 of this embodiment is formed of a resin foam molding. Two
When one of the side molds of the sheet is formed of a resin foam molding, a plywood mold, a metal mold, or the like, which is normally used, can be used as the other mold. . If one is a resin foam molded product, either the inner mold or the outer mold may be the resin foam molded product, but if the outer mold is made of a resin foam molded product, for example, It is also possible to use the foundation itself, which has been insulated, as a heat storage body. 1 to 3 show an aspect in which both side molds are formed of a resin foam molding.

That is, in this embodiment, there are two resin foam moldings 2a and 2b which form the side mold of the concrete foundation. The resin foam molded body 2a is an outer mold, and the resin foam molded body 2b is an inner mold. The resin foam moldings 2a and 2b have a desired shape while foaming a foamable resin such as polystyrene, polyvinyl chloride, polyethylene, polypropylene, polyurethane, epoxy resin and phenol resin to about 5 to 80 times. It is formed by shaping. By foam-molding the resin with such a foaming ratio, a large number of closed cells are formed in the resin foam-molded product, and excellent heat insulating performance is exhibited.

A resin foam molding 2 forming this side mold
The height of a, 2b is usually 500-2000 mm,
The thickness is usually within the range of 15 to 100 mm and has a uniform thickness throughout. The side molds 2a, 2b having such a thickness have excellent heat insulation performance, and have high self-shape retention, so that the side molds 2a, 2b can be prevented from increasing even if the internal pressure increases due to concrete pouring. Less bulging outward and deformation.

In this embodiment, the outer mold form 2a and the inner mold form 2b.
Has the same shape as shown in FIGS. 1 and 3, and the outer formwork 2a and the inner formwork 2b are symmetrically placed side by side to form a wide footing 3 at the bottom. Then, a gap 5 for pouring concrete is formed on the footing 3 so that the rising portion 4 is planted.

In this embodiment, the outer mold form 2a and the inner mold form 2b.
A separator 5 is provided between the outer mold 2a and the inner mold 2b to secure a gap 5 for forming the rising portion 4 between the outer mold 2a and the inner mold 2b. This separator 6,6
Can be made of wood, synthetic resin, metal, resin foam or the like. In particular, it is preferable that the separators 6 and 6 are formed of a material having low thermal conductivity such as wood, synthetic resin or resin foam. By forming this separator with a material having a low thermal conductivity, it is possible to reduce leakage of heat energy from the separator. The separators 6 and 6 penetrate the outer mold 2a and the inner mold 2b from the mold part that forms the rising portion 4 of the outer mold 2a and the inner mold 2b made of a resin foam molding, and form the outer mold. It is laid so as to form a predetermined gap 5 between the inner mold 2b and the inner mold 2b.

Conventionally, in a mold for a concrete foundation using a resin foam, the separator as described above is also laid on the footing 3 portion, and the footing is formed by pouring the concrete. Was there.
However, as shown in FIG. 3, a large number of reinforcing bars are laid in the vertical and horizontal directions in the footing 3 part, so that the separator in the footing 3 part reduces the workability of the reinforcing bar. Further, the separator in the footing 3 portion was often damaged during the work of reinforcing the bar.

In the present invention, the side face frame fixing member 7 is arranged in the footing 3 portion without disposing a separator as in the conventional case, and the side face form frame is formed at the lower end portions of the outer form frame 2a and the inner form frame 2b. Is fixed.

In the present embodiment, the side frame fixing member 7 has a square material shape as shown in FIGS. The side surface mold fixing member 7 is formed with fitting grooves 9 into which the lower ends 8 of the outer mold 2a and the inner mold 2b are fitted and inserted near both ends. The fitting grooves 9, 9 have the same length as the width of the footing 3 formed by the lower parts of the outer mold 2a and the inner mold 2b, and are usually in the range of 200 to 1000 mm. Further, the width of the fitting groove formed in the side face mold fixing member 7 in the vicinity of both ends is almost equal to the thickness of the outer mold 2a and the inner mold 2b, and usually 15 to 10
Within the range of 0 mm. This side frame form fixing member 7
Although there is no particular limitation on the height of the fitting, by forming a fitting groove 9 having a depth that allows the outer mold 2a and the inner mold 2b to be stably fitted and inserted, and by forming such a fitting groove 9 Also, in order to ensure that the side face frame fixing member 7 has a predetermined strength, it is usually 30 mm or more, preferably 35 to 70 mm.
It has a certain height. And the depth of this fitting groove 9 is
It suffices that the side surface form fixing member 7 can be stably self-supporting, and it is usually about 10 to 60 mm, and usually 90% or less, preferably 3% with respect to the height of the side surface form fixing member 7.
It preferably has a depth of 0 to 90%. By forming the fitting groove 9 having such a depth, the lower edge portions 8, 8 of the outer mold 2a and the inner mold 2b are securely fixed to the fitting groove, and even when concrete is cast, the outer mold The bottom end of the footing 3 formed from the mold 2a and the inner mold 2b does not spread to the bottom.

Such a side formwork fixing member 7 is made of wood,
It can be formed of various materials such as synthetic resin, metal, concrete, etc., but particularly in the present invention, it is preferable that the side surface form fixing member 7 is formed of resin foam. Further, among the resin foams, a plate-shaped resin foam produced by extruding and foaming polystyrene, polyvinyl chloride, polyethylene, polypropylene or the like is particularly preferable. When the extruded foam molding is used, the fitting groove can be cut more easily than the resin foam formed by in-mold foaming.

The surface of the plate-like resin foam produced in this manner is cut off to make the surface smooth, and then cut to form a fitting groove having a desired width and depth. The concrete foundation is constructed as follows using the formwork as described above.

First, a resin foam molding which constitutes the outer mold 2a and the inner mold 2b is manufactured in a factory by, for example, an in-mold foaming method. Separately from this, a plate-shaped resin foam body for forming the side surface frame fixing member 7 is manufactured by, for example, an extrusion foaming method, and the surface of the obtained resin foam plate is cut and smoothed. Next, two fitting grooves 9 are formed in the resin foam plate at a predetermined interval. The resin foam plate having the two fitting grooves 9 formed in this manner is cut into a predetermined width so as to be orthogonal to the fitting grooves 9 to obtain the side face frame fixing member 7. Alternatively, a synthetic resin product formed by injection may be used.

On the other hand, at the construction site, the foundation level is adjusted by digging roots so that a concrete foundation can be erected, then laying cobblestone, and if necessary, placing a stacon. In addition, although it is not usually necessary to dispose reinforcing bars in the stacon that has been placed in this manner, for example, when using a plate-shaped side formwork fixing member, by arranging vertical bars in the stercon, It is also possible to engage the lateral formwork fixing member with the vertical line.

The side wall fixing members 7 are placed at predetermined intervals on the thus-prepared stercon or cobblestone. At this time, the side wall fixing member 7 is placed so that the fitting groove 9 formed in the side wall fixing member 7 serves as a guide groove for laying the outer mold 2a and the inner mold 2b. If necessary, the side wall fixing member 7 may be fixed to the stacon or the like by bonding with an adhesive or mortar dango.

After the side wall fixing member 7 is thus arranged,
For example, as shown in FIGS. 2 and 3, necessary bar arrangements 10,1
0, 10 ... The reinforcing bar placed on the stacon is
It is preferable to float about 30 to 80 cm from the surface of the stacon. For example, by sandwiching a dice-shaped resin foam between the reinforcing bar and the stacon, the reinforcing bar can be floated from the surface of the stacon.

Then, the outer mold 2a and the inner mold 2b are fitted into the fitting grooves 9 formed in the side wall fixing member 7, respectively, and the outer mold 2a and the inner mold 2b are erected. In order to secure a gap 5 in which concrete is placed in the mold parts of the upper vertical frame 4 forming the rising portions of the outer mold 2a and the inner mold 2b thus erected, separators 6, 6 are provided.
Is inserted from the outside of the outer mold 2a or the inner mold 2b to secure the gap 5.

In order to facilitate the insertion work of the separators 6 and 6 described above, lines or slits are provided on the outer peripheral surfaces of the outer mold 2a and the inner mold 2b at intervals of, for example, about 30 mm. It is preferable.

Further, it is preferable that the abutting portions of the respective molds are joined together so that a gap is not formed in the abutting portions with the adjacent molds. Further, in such a butting portion, it is preferable to connect the molds to each other using a connecting jig, an adhesive tape or the like.

After forming the formwork in this way, the level of the upper part of the formwork (base top end) is usually adjusted in order to form a cloth foundation or the like at a desired height. The base crown level is adjusted using a cutter or nichrome wire.

The above description is based on the side frame fixing member 7
After laying, the reinforcement is shown, but the rear side formwork fixing member 7 may be laid after the reinforcement. Further, in order to form the projecting corner or the entering corner, the mold of the present invention can be cut obliquely and the mold thus cut can be bonded.

Since the outer mold 2a and the inner mold 2b used in the present invention have high strength, an outer mold for holding the mold is not particularly required, but the outer mold 2a and the outer mold 2a are not necessary. By arranging the auxiliary form outside the inner form 2b, it is possible to effectively prevent the form from being deformed by the pressure of the concrete to be placed.

In this way, the side surface mold fixing member 7 and the outer mold 2
After arranging a and the inner mold 2b, concrete is placed in the gap 5 formed between the outer mold 2a and the inner mold 2b, and the concrete is hardened to form a concrete foundation. .

Although concrete can be poured in this way and used as it is as a concrete foundation, since the top end of the foundation may be slightly depressed as the concrete hardens, the concrete is completely hardened after the concrete is poured. Before doing so, it is preferable to smooth the top of the concrete foundation by flattening the top.

After the concrete is hardened, the auxiliary formwork, if used, is removed to form the concrete foundation of the present invention. That is, the concrete foundation formed by the present invention has a footing 3 formed of concrete and a rising portion 4 standing on the footing 3. The footing 3 and the surface of the rising portion 4 are made of concrete. It is covered by the resin foam moldings 2a and 2b which acted as a mold at the time of placement,
The concrete foundation and the resin foam moldings 2a and 2b are integrated. Thus, this concrete foundation is used without removing the resin foam molding on the surface. Therefore,
Since the outer formwork 2a and the inner formwork 2b which have become the formwork can be used as they are as the heat insulating material of the concrete foundation, the heat insulating foundation structure can be easily constructed. Further, according to the method of the present invention, the lower edges of the outer mold 2a and the inner mold 2b are fixed by inserting the lower edges 8 and 8 into the fitting grooves of the sidewall mold fixing member 7. The footing 3 does not change its shape.

Further, the fitting groove 9 formed in the side wall mold fixing member 7 also serves as a guide groove when the outer mold 2a and the inner mold 2b are installed, so that the side mold is fixed on the stercon. By arranging the members 7 accurately, the outer formwork 2a and the inner formwork 2b can be accurately laid without marking out to lay the outer formwork 2a and the inner formwork 2b. Is very easy to install. Furthermore, since the outer mold 2a and the inner mold 2b and the side mold fixing member 7 are laid separately, the conventional resin foam in which the outer mold 2a, the inner mold 2b and the separator (rib) are integrated. Reinforcement work can be done much easier than using a body form.

The present invention is not limited to the above-mentioned embodiments, but can be modified in various ways. For example, in the present invention, the form of the concrete foundation to be formed does not need to be a form in which the footing 3 shown in FIGS. 1 to 3 spreads in both directions, and for example, as shown in FIG. May be vertically raised from the side surface frame fixing member 7. Thus the outer mold 22a
The linearity is highly useful, for example, when there is not enough space to form a footing between adjacent houses. Further, as shown in FIGS. 1 to 3, in the concrete foundation of the present invention, the footing and the rising portion are joined by rising diagonally from the footing, but the present invention is not limited to this, and as shown in FIG. The rising portion may be provided upright at a right angle.

In FIG. 4, members common to those in FIGS. 1 to 3 are given the same numbers. Furthermore, FIG.
As shown in FIG. 6 and FIG. 6, the side form upper end fixing member 17 having a U-shaped cross-section is inserted into the upper ends of the side form 2a, 2b, and the side form 2a, 2b is placed by the weight of the concrete when placing the concrete. It is preferable not to open the upper end of the.

The side frame upper end fixing member 17 can be formed of resin foam, wood, resin molding or the like. The interval for drying the side frame upper end fixing member 17 is
The thickness can be set as appropriate in consideration of the thickness of the resin foam forming the side frame, etc., but it is usually fitted at intervals of 10 to 100 cm. It is needless to say that the side frame upper end fixing member 17 can also be used when constructing a concrete foundation in which one rising portion 4 is vertically installed as shown in FIG. 7.

When using the side form upper end fixing member 17 as described above, the side form upper end fixing member 17 is inserted from the upper end of the installed side form, and then concrete is placed in the form. A concrete foundation can be constructed in the same manner as described above, except that the concrete foundation is poured and then hardened to such an extent that the concrete exhibits self-shape retention, and then removed.

As described above, by using the side frame upper end fixing member 17, the rising portion 4 of the concrete foundation is
The width can be made uniform. 5 to 7 showing the above-described embodiment of the present invention, common members to those in FIGS. 1 to 4 are given common reference numerals.

[0045]

According to the method of the present invention, the spacers for forming footings on the inner walls of the formwork of the footing portion are not bridged as in the conventional method, and the lower end portions of the inner side surface formwork and the outer side surface formwork are connected to the side formwork. The side surface formwork is fixed by being fitted into the fitting groove formed in the fixing member. Moreover, since this side formwork fixing member is arranged so that the lower end portion of the sidework form is fitted and inserted, the sidework form fixing member is not damaged during the reinforcement work, so that the reinforcement work is very easy. It will be easier. Further, since the lower end portion of the side surface form is fitted and fixed in the fitting groove of the side surface form fixing member, the side surface formwork is not deformed or moved even when the concrete is cast.

Further, since the side surface form fixing member acts as a positioning member for the side surface form, the side wall form can be accurately laid at the construction site. Further, when the plate-shaped side form fixing member is used, leakage of thermal energy from the lower part of the concrete foundation to the ground is also reduced.

Further, by using the side surface formwork upper end fixing member, the dimensional accuracy of the rising portion of the foundation becomes high.

[Brief description of drawings]

FIG. 1 is a perspective view showing a concrete foundation formwork according to an embodiment of the present invention.

FIG. 2 is a front view of a concrete foundation formwork of the same embodiment.

3 is a cross-sectional view taken along the line AA in FIG.

FIG. 4 is a perspective view showing another embodiment of the present invention.

FIG. 5 is a perspective view showing an embodiment using a side frame upper end fixing member.

FIG. 6 is a cross-sectional view of the embodiment shown in FIG.

FIG. 7 is a perspective view showing another embodiment using a side formwork upper end fixing member.

FIG. 8 is a perspective view showing a conventional concrete foundation formwork.

[Explanation of symbols]

 1 ... Formwork for concrete foundation 2a, 22a ... Outer formwork 2b, 22b ... Inner formwork 3 ... Footing 4 ... Rising part 5 ... Gap 6 ... Separator 7 ... ..Side form frame fixing member 8 ... Form frame lower edge portion 9 ... Fitting groove 10 ... Reinforcing bar 17 ... Side form frame upper end fixing member

Claims (7)

[Claims] 1. Two side molds of a concrete foundation, at least one of which is formed of a resin foam molding, and a lower end portion of the two side molds so as to stand upright at a predetermined interval. A side formwork fixing member having two fitting grooves to be fitted together, and a separator for forming a concrete pourable space between the two sideview formworks in the vicinity of the upper ends of the two sidework forms. A formwork for a concrete foundation, which has: 2. From the upper end of the two side molds,
2. The concrete foundation according to claim 1, wherein a gap width formed by the side surface formwork is fixed by a side surface formwork upper end fixing member which is inserted so as to sandwich the side surface formwork. Formwork. 3. The side form frame fixing member and the side form frame upper end fixing member are formed of a material selected from the group consisting of a resin foam, a wood and a resin molded body. Alternatively, the formwork for the concrete foundation according to item 2. 4. A side face formwork in which at least one side face formwork of a concrete foundation formed of a resin foam molding has a lower end portion so that the two side face forms stand upright with a predetermined interval. The separator is fitted into the fitting groove formed in the fixing member, and the separator is arranged so that a concrete pouring space is formed near the upper ends of the two side molds. A method of constructing a concrete foundation in which at least one surface of the outer circumference of the concrete foundation is surrounded by a resin foam molding by pouring concrete in a gap formed by a side surface form. 5. From the upper ends of the two side molds, the two
5. The method according to claim 4, wherein the gap width formed by the side surface formwork is fixed by a side surface formwork upper end fixing member that is inserted so as to sandwich the side surface formwork. 6. The side form frame fixing member and the side form frame upper end fixing member are formed of at least one kind of material selected from the group consisting of a resin foam, a wood and a resin molded body. Item 4. The method according to Item 4 or Item 5. 7. The level alignment of the upper end portion of the side surface formwork is performed after the side surface formwork is fitted into the fitting groove of the side surface formwork fixing member and before the concrete is placed. Method described in section.