JP2001003564A - Left-in-place heat-insulating form - Google Patents

Abstract

PROBLEM TO BE SOLVED: To minimize the excavated materials in an irreducible quantity in excavation construction works, and to prevent the dew condensation on the internal surface of a constructed concrete wall by installing the mutual connecting sections of forms to a peripheral section on the concrete placing side and mounting a heat-insulating material to the internal side face of the forms. SOLUTION: Connecting holes 10 are formed to an outer circumferential rib 6 with a plane at a right angle to the face plate 3 of the left-in-place heat-insulating forms 1. An opening (d) is formed between the forms 1 and the outer circumferential rib 6, and a tabular porous heat-insulating material 5 having water resistance such as foamed polystyrene is installed. When the concrete wall of a basement is constructed, a ground surface is excavated and excavation construction works are conducted, and the heat-insulating forms 1 are mounted after floor slab construction works. The heat-insulating material 5 is directed towards the concrete placing side at that time, bolts are inserted into the connecting holes 10, and the forms 1 are connected mutually by nuts. Soil and sand are back filled up to the forms 1, concrete is placed and cured, and the heat-insulating forms 1 are left-in-placed and a wall is formed. Accordingly, condensation on an internal surface is prevented, and an operator space on the face plate 3 side is made unnecessary, and the quantity of excavated materials can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a formwork used for constructing a concrete wall, and more particularly to a buried insulation form suitable for constructing a concrete wall underground.

[0002]

2. Description of the Related Art Generally, as a formwork for constructing a concrete wall or the like, as shown in FIG. 12, a face plate 51 constituting a plane on which concrete is cast and an outer surface 52 of the face plate 51 are formed. An outer peripheral rib 53 formed on the periphery of
A steel formwork having a middle rib 54 formed to connect between the outer peripheral ribs 53 for reinforcement and a connection hole 55 formed in the outer peripheral rib 53 for connecting adjacent formwork. 56 are frequently used.

When constructing a basement or an underground parking lot,
When a concrete wall is constructed underground using such a steel frame 56, the following construction method has conventionally been used. That is, as shown in FIG.
Excavate the ground and perform root cutting. At this time, a space 57 sufficiently larger than a space required for construction of a basement or an underground parking lot is formed, and an earth retaining 59 for preventing collapse of the steep ground 58 around the space 57 is provided. . The earth retaining 59 is usually performed by driving a column of H-shaped steel into the soil and bridging an earth retaining plate between the H-shaped steels.
After the construction of the floor slab 60 serving as a floor of a basement or an underground parking lot is performed inside the space 57, the steel formwork 56 for constructing a concrete wall is installed thereon.

When the steel formwork 56 is installed, a pair of the steel formwork 56 is disposed so that the inner side surfaces 61 of the face plate 51 on the concrete casting side face each other. A connecting tool such as a bolt or a hook (not shown) is inserted into the formed connecting hole 55, and the adjacent steel form 56 is connected and installed. Next, a temporary work scaffold 62 is provided along the steel formwork 56. Then, an operator 63 places concrete in the steel formwork 56 from above the work scaffold 62, cures the concrete for several days and hardens the concrete, and then removes the steel formwork 56. After the construction of the concrete wall is completed in this manner, the earth retaining member 59 is dismantled, and the space between the concrete wall and the surrounding ground 58 is filled with earth and sand.

However, as described above, in a basement or an underground parking lot using a concrete wall constructed using the conventional steel formwork 56, there is a problem that dew condensation easily occurs on the inner surface of the concrete wall. That is, when the temperature is high such as in summer, the temperature of the earth and sand outside the concrete wall is lower than the temperature of the inside air,
The temperature difference causes dew condensation on the inner surface of the concrete wall. For this reason, in the past, such measures were taken by providing a heat insulating panel on the inner surface of the concrete wall, but such a method not only requires construction work for providing the heat insulating panel, but also makes the surface of the heat insulating panel look good. In addition, there is a problem in that a process for performing the process is required, which leads to an increase in construction cost and an extension of a construction period.

In the conventional steel mold 56, a connecting hole 55 for connecting adjacent molds is formed on the outer surface 5 of the face plate 51.
2 is formed on the outer peripheral rib 53 provided on the side 2, and is arranged on the side facing the steep ground 58 in order to form the outer surface of the concrete wall of the pair of opposed steel formwork 56. As for the steel form 56 on the outer periphery, the steel form 56 and the ground 5
An operator enters between them and performs an operation of connecting the adjacent steel formwork 56. Therefore, a space is required between the steel formwork 56 on the outer periphery and the steep ground 58 at least for one worker, and it is necessary to excavate a large amount of soil by root cutting work. there were.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is possible to easily prevent the formation of dew on the inner surface of a concrete wall constructed underground. It is an object of the present invention to provide a buried and heat-insulated formwork capable of minimizing the amount of earth and sand excavated by root cutting work when constructing a concrete wall.

[0008]

Means for solving the above problems are as follows. In other words, in the buried thermal insulation form according to claim 1, a connecting portion for connecting adjacent form forms to each other is provided on a peripheral portion of an inner side surface which is a concrete placing side of the face plate, and the inside of the face plate is provided. A heat insulating material is provided on the side surface.

According to a second aspect of the present invention, there is provided a buried heat insulating form according to the first aspect, wherein an outer peripheral rib is formed on a peripheral portion of an inner surface of the face plate, and the outer peripheral rib is used as the connecting portion. A connection hole is formed at a predetermined position of the rib.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a buried thermal insulation mold according to the present invention. As shown in FIG. 1, a buried thermal insulation mold 1 according to an embodiment of the present invention includes a connecting portion 2 for connecting adjacent molds to each other with a face plate 3.
And a heat insulating material 5 is provided on the inner surface 4 of the face plate 3. Hereinafter, this will be described in more detail.

The buried heat-insulating formwork 1 according to the present embodiment has a face plate 3 formed in a rectangular flat plate shape constituting a main body portion. The dimensions of the face plate 3 are not particularly limited, but are usually preferably determined according to the building module. It is also possible to prepare the buried thermal insulation form 1 having a plurality of face plates 3 of different dimensions.

An outer peripheral rib 6 is formed on a peripheral portion of the inner side surface 4 of the face plate 3. The outer peripheral rib 6 includes vertical outer peripheral ribs 7 formed on both sides of the buried and heat-insulating form 1,
It consists of horizontal outer peripheral ribs 8 formed on the upper and lower parts, and is used to reinforce the face plate 3 and prevent deformation of the buried heat insulating form 1 and to connect adjacent buried heat insulating form 1. It is formed to form the contact surface 9. Therefore,
The shape of the outer peripheral rib 6 is a shape having a plane perpendicular to the face plate 3 so as to form the contact surface 9.

A connecting hole 10 is formed at a predetermined position on the outer peripheral rib 6 as a connecting portion 2 for connecting adjacent buried heat-insulating forms 1 to each other. The connection hole 10
Is a circular hole through which a connecting tool such as a bolt or a hook is inserted. The position of the circular hole is arbitrary. It is necessary that the positions of the connection holes 10 match. Therefore, the connection hole 10 is formed at the same position for all of the buried and heat-insulating molds 1, and is formed in the vertical outer peripheral rib 7 so that the connection hole 10 is at the same position when used upside down. The connecting holes 10 formed in the lateral outer circumferential rib 8 are vertically symmetrical.
0 is formed symmetrically.

The form of the connecting portion 2 is not limited to a structure in which a connecting tool is inserted through the connecting hole 10, but may be any other well-known form in the art of connecting structures. It is possible to apply. Therefore, although not shown, the outer peripheral rib 6 is not directly formed with the connecting hole 10 or the like, and the outer peripheral rib 6 is directly connected by a clip-shaped fastener. Various types of connecting portions 2 can be used, such as a structure in which portions and concave portions are alternately formed, and they are hooked and connected.

A heat insulating material 5 is provided between the outer peripheral ribs 6 on the inner side surface 4 of the face plate 3. The heat insulating material 5 is a water-resistant porous heat insulating material such as styrene foam or polyethylene foam, and has a thickness equal to or less than the height of the outer peripheral ribs 6 from the inner side surface 4 of the face plate 3. It is preferable to use a plate having the following.

As shown in FIG. 2, which is a cross-sectional view taken along the line AA of the buried insulation form 1, the size of the heat insulating material 5 is such that when the heat insulating material 5 is attached to the inner surface 4 of the face plate 3, It is formed to have a width and a height such that a constant gap d is formed between the heat insulating material 5 and the outer peripheral rib 6. This is because, when the heat insulating material 5 is provided in close contact with the outer circumferential rib 6, a connecting tool such as a bolt or a hook is inserted into the connecting hole 10 formed in the outer circumferential rib 6, and the adjacent heat-insulating type is inserted. This is because the work of connecting the frames 1 cannot be performed. Here, in the embedded heat-insulating form 1 used by being connected only in the horizontal direction, as shown in FIG. 1, a constant gap d is provided only between the longitudinal outer peripheral rib 7 and the heat insulating material 5. In the embedded heat-insulating form 1 used in connection with the vertical direction in addition to the horizontal direction, as shown in FIG.
A certain gap d is also provided between the lateral outer peripheral rib 8 and the heat insulating material 5. In addition, the attachment of the heat insulating material 5 to the face plate 3 is usually performed by attaching using an adhesive or the like, but is not limited thereto, and may be attached by another method.

When the face plate 3 is used in a situation where a large pressure is applied, such as when the height of the concrete wall to be constructed is high, as shown in FIG. 4, the inner surface 4 of the face plate 3 is provided for reinforcement. In some cases, a large number of middle ribs 11 may be formed so as to connect between the outer peripheral ribs 6. In this case, the heat insulating material 5 is attached to each of the portions separated by the middle ribs 11.

As shown in FIG. 5, the face plate 3 may be bent at a right angle to be used at the corner of a concrete wall to be constructed. Since the buried thermal insulation form 1 according to the present invention is used as an outer peripheral form forming the outer surface of a concrete wall as described later, only the form for the corner of the concrete wall is required. Therefore, the inside surface 4 of the face plate 3 is the inside angle side of the face plate 3 bent at a right angle, and the heat insulating material 5 is provided on the inside angle side of the face plate 3.

Next, a method for using the buried insulation form 1 according to the embodiment of the present invention will be described. When constructing a concrete wall in the basement using the buried insulation form 1 according to the present embodiment, for example, when constructing a basement or an underground parking lot, the following construction method is used. That is, as shown in FIG. 6, first, the ground is excavated to perform root cutting work. In the present embodiment, unlike the conventional construction method, a space 12 slightly larger than a space required for construction such as a basement or an underground parking lot is formed, and the steep ground 13 around the space 12 is soiled. No clasp is provided. A floor slab 1 serving as a floor portion of a basement or an underground parking lot is provided inside the space 12.
After the construction of 4, the formwork for constructing the concrete wall is installed thereon. At this time, as shown in FIG.
In order to form the outer surface of the concrete wall, the outer peripheral form 15 arranged on the side facing the steep ground 13 is the above-mentioned buried insulation form 1, and the inner peripheral form 16 for forming the inner surface of the concrete wall is A normal steel mold 56 is used. The steel formwork 56 is the same as that described in the section of "Prior Art". Therefore, the following description is given with the same reference numerals.

When installing a formwork for constructing a concrete wall, first, the embedded heat-insulating formwork 1 constituting the outer peripheral formwork 15 is installed first. The buried insulation form 1
As shown in FIG. 8, which is a horizontal cross-sectional view thereof, the inner surface 4 of the face plate 3 provided with the heat insulating material 5 is oriented so as to be on a concrete casting side. The contact surfaces 9 are arranged in close contact with each other. Then, a bolt 18 is inserted into a connection hole 10 formed in the outer peripheral rib 6, and a nut 19 is fastened to connect to each other. As described above, since the connection hole 10 which is the connection portion 2 of the buried heat insulating form 1 is formed in the outer peripheral rib 6 provided on the peripheral portion of the inner surface 4 of the face plate 3, the burying is achieved. The work of connecting the heat-insulating formwork 1 can be performed from the side of the inner surface 4, that is, from the side where concrete is cast. Therefore, it is not necessary to provide a space for the worker to enter between the buried and heat-insulated formwork 1 and the steep ground 13, and the amount of excavated soil by excavation can be reduced by that much. . It is also possible to use other connecting tools such as hooks instead of the bolts 18 and the nuts 19, but the buried heat insulating form 1 is buried underground while being attached to the outer surface of the concrete wall. Therefore, from the viewpoint of the reliability of the fastening and the cost, the bolt 1
Since the connection by the nut 8 and the nut 19 is preferable, this is the case in the present embodiment.

After installing the buried and heat-insulating formwork 1 constituting the outer formwork 15, a steel formwork 56 constituting the inner formwork 16 is provided. At this time, as shown in FIG. 9 which is a horizontal cross-sectional view, the inner side surface 61 of the face plate 51 on which the outer peripheral rib 53 is not formed is on the concrete placing side, that is, on the side of the buried heat insulating form 1. And the peripheral ribs 53 are arranged so as to be in close contact with each other. And
The hook 20 is inserted into the connection hole 55 formed in the outer rib 53.
And connected to each other. In the steel mold 56, since the connection holes 55 are formed in the outer peripheral ribs 53 provided on the peripheral edge of the outer surface 52 of the face plate 51, the steel mold 56
Is performed from the outer surface 52 side. Therefore, the buried thermal insulation form 1 constituting the outer peripheral form 15 and
The steel mold 56 forming the inner peripheral form 16 can be connected to the steel mold 56 from the side opposite to the steep ground 13. It should be noted that the steel mold 56 is connected by the hooks 20 unlike the buried and heat-insulated mold 1, and the steel mold 56 needs to be removed after the concrete wall is hardened. This is because it is preferable to use a hook 20 that can be easily attached and detached.

Next, as shown in FIG. 10, earth and sand 21 are buried in the space between the outer peripheral formwork 15 and the steep ground 13. At this time, in order to prevent the outer peripheral form 15 and the inner peripheral form 16 from falling to the opposite side due to the pressure of the backfilled earth and sand 21, the outer form 15 and the inner peripheral form 16 are previously prepared.
A support 22 is provided in advance. In the present embodiment, the inner peripheral form 16 is supported by providing a beam 23 between the inner peripheral forms 16 on both sides, and supporting the beam 23 from below by a telescopic pipe support 24. It has a structure. The outer peripheral form 15 is supported by a separator 25 so as to be parallel to the inner peripheral form 16.

As described above, before the concrete is poured into the formwork, the peripheral formwork 15 and the ground 1
3, the space between the excavation work and the formation of the concrete wall, which has conventionally been required for a long time from the excavation work to the completion of the concrete wall, is reduced from the excavation work to the formwork. Can be greatly shortened before the installation of the device. Therefore, construction can be performed while avoiding heavy rain or a typhoon, so that it is not necessary to provide earth retaining on the steep ground 13, so that the construction period can be shortened and the construction cost can be reduced. This also makes it possible to cast concrete between the outer peripheral formwork 15 and the inner peripheral formwork 16 from the backfilled earth and sand 21, which was conventionally required. The work scaffold provided along the periphery of the formwork can be eliminated.

Next, an operator 26 places concrete between the outer formwork 15 and the inner formwork 16 from the backfilled earth and sand 21 and cures the concrete for several days. To cure. Then, as shown in FIG. 11, the inner peripheral formwork 16 and the support 22 supporting the inner peripheral formwork 16 are removed, and the concrete wall 27 is completed. And the outer periphery of the concrete wall 27, that is,
Between the concrete wall 27 and the surrounding soil 21
The buried heat insulating form 1 constituting the outer peripheral form 15 is buried and left as it is. Since the buried insulation form 1 is provided with the heat insulating material 5 on the inner surface 4 of the face plate 3, the buried insulation form 1 is buried and left on the outer periphery of the concrete wall 27. Thereby, the same effect as providing the heat insulating material 5 on the outer surface of the concrete wall 27 can be obtained. Therefore, as before,
The earth and sand 2 on the outside of the concrete wall 27 can be used without separately constructing a heat insulating material on the inner surface of the concrete wall 27.
It is possible to insulate the inside of the concrete wall 27 from the inside and prevent the dew condensation from occurring on the inner surface of the concrete wall 27. After the concrete wall 27 is constructed in this way, the work of providing a ceiling thereon and the like will be continuously performed.

[0025]

As described above, according to the first aspect of the present invention,
According to the embedded heat-insulating formwork according to the above, the following effects can be obtained. That is, the buried insulation formwork is provided with a heat insulating material on the inner surface of its face plate, so that it is used as an outer formwork of a concrete wall to be constructed underground, and is buried and left as it is to leave the concrete. A heat insulating material can be easily provided on the outer surface. This makes it possible to insulate the earth and sand on the outside of the concrete wall from the air on the inside and to prevent dew condensation on the inner surface of the concrete wall. Therefore, unlike the related art, there is no need to separately perform a work of providing a heat insulating material on the inner surface of the concrete wall, and it is possible to reduce the construction cost and the construction period.

In addition, since the connecting portion for connecting the adjacent formwork to each other is provided on the peripheral portion of the inner surface on the side where the concrete is cast on the face plate, the connecting work of the adjacent buried heat insulating formwork can be performed. Can be performed from the inner surface thereof, that is, from the concrete casting side. Therefore, it is not necessary to provide a space for the worker to enter between the buried and heat-insulated formwork and the steep ground, and the amount of excavated soil by the excavation work can be reduced accordingly.

According to the buried thermal insulation form according to claim 2 of the present invention, in addition to the above-described effects, the outer peripheral rib is formed on the peripheral portion of the inner side surface of the face plate to reinforce the face plate, It is possible to prevent deformation of the buried and heat-insulated formwork, and to form a contact surface for easily bringing the buried and heat-insulated formwork into close contact with each other. Also,
By forming a connection hole at a predetermined position of the outer circumferential rib as the connection portion, a connection portion can be easily and inexpensively formed, and a connection method and a connection tool similar to those of a conventional steel mold are used. Can be connected.

[Brief description of the drawings]

FIG. 1 is a view showing a buried heat insulation formwork according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a view showing an example of a buried thermal insulation formwork according to an embodiment of the present invention, which is used by being connected not only in the horizontal direction but also in the vertical direction.

FIG. 4 is a view showing an example of a buried heat insulation formwork according to an embodiment of the present invention, in which a large number of middle ribs are formed.

FIG. 5 is a view showing an example of a buried heat insulating formwork according to an embodiment of the present invention, which is used for a protruding corner portion.

FIG. 6 is an explanatory view of a method of using the buried insulation formwork according to the embodiment of the present invention, showing a state where the formwork is installed after the root cutting work.

FIG. 7 is an explanatory view of a method of using the buried heat insulating formwork according to the embodiment of the present invention, showing the arrangement of the buried heat insulating formwork and the steel formwork.

FIG. 8 is an explanatory view of a method of using the buried heat insulating formwork according to the embodiment of the present invention, and is a horizontal sectional view showing a state where the buried heat insulating formwork is arranged and connected.

FIG. 9 is an explanatory view of a method of using the buried heat insulating formwork according to the embodiment of the present invention, and is a horizontal cross-sectional view showing a state where steel forms are arranged and connected.

FIG. 10 is an explanatory view of a method of using the buried heat insulating formwork according to the embodiment of the present invention, showing a state in which earth and sand are backfilled between the outer peripheral formwork and the steep ground.

FIG. 11 is an explanatory diagram of a method of using the buried insulation form according to the embodiment of the present invention, showing a state in which an underground concrete wall is completed.

FIG. 12 is a view showing a steel formwork according to a conventional example.

FIG. 13 is an explanatory diagram of a method of constructing an underground concrete wall according to a conventional example.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 buried heat insulating form 2 connecting portion 3 face plate 4 inner surface of face plate 5 heat insulating material 6 outer peripheral rib 9 outer peripheral rib tight contact surface 10 connecting hole 11 middle rib 13 steep ground 15 outer peripheral form 16 inner peripheral form 21 backfill D The gap between the outer rib and the insulation

Claims (2)

[Claims] 1. A connecting portion for connecting adjacent formwork members to each other is provided on a peripheral portion of an inner surface on a concrete casting side of a face plate, and a heat insulating material is provided on an inner surface of the face plate. And buried insulation formwork. 2. An outer peripheral rib is formed at a peripheral portion of an inner side surface of the face plate, and a connecting hole is formed at a predetermined position of the outer peripheral rib as the connecting portion.
The buried insulation form as described.