JP3150535B2 - Insulated precast concrete foundation and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a precast concrete (hereinafter, referred to as "PC") foundation, and more particularly to an insulated PC foundation integrally provided with a heat insulating material and a method of manufacturing the same.

[0002]

2. Description of the Related Art As a style of a building, there is a style in which a rising portion of a foundation is an outer wall. For example, the foundation of a cold district is raised to deepen the roots to prevent the foundation from rising due to freezing of the ground, so the height of the foundation becomes high. is there. In particular, in a cold region, since it is essential to provide a heat insulating material on the outer wall, it is necessary to provide a heat insulating material on the rising portion of the foundation as the outer wall.

[0003] Japanese Patent Publication No. 6-3880 discloses a technique for providing a heat insulating material on a foundation. However, such a technique is to provide a heat insulating material inside the cast-in-place foundation, and the work of providing the heat insulating material is increased, so that the work of constructing the foundation at the construction site is increased.

Japanese Patent Application Laid-Open No. 5-125538 discloses a formwork provided with a heat insulating material. If this formwork is used, the work as a cast-in-place foundation is the same as in the past. The basis of hammering is a lot of work on the construction site.

[0005] In order to simplify and speed up the foundation construction work at a construction site, there is a foundation construction type in which a PC foundation manufactured in advance in a factory is installed at a root cutting portion. And
If a heat insulating material is integrally provided in advance at the factory on the PC foundation, the work of building the foundation at the construction site is simplified because the base is made of PC, and since the heat insulating material is provided at the factory, the building site is provided. There is no increase in work.

Further, there is a need for a technique for performing this operation in an efficient and economical manner when providing a heat insulating material to a PC foundation at a factory.

[0007] It is an object of the present invention to provide an insulated PC foundation capable of achieving an insulating effect, or to provide a method for efficiently and economically producing this insulated PC foundation.

[0008]

In order to achieve the above object, according to the first aspect of the present invention, a building stands upright in a vertical direction.
The rising part to support and the building outer surface of this rising part
Insulation material to be provided and an exterior cover covering the surface of the insulation material
Heat-insulated precast concrete
The foundation is provided on the upright side from the lower end on both sides.
Footing portion protruding towards the integrally provided, wherein
A concrete penetrating from the upper surface to the lower surface
A heat filling port is formed, and the heat insulating material and the exterior cover are
Provided at a predetermined distance from the upper surface of the footing part.
It is characterized by being performed.

According to a second aspect of the present invention, in the heat-insulated precast concrete foundation of the first aspect, the exterior cover is formed by thinly extending reinforced concrete.

[0010]

[0011] Then, the invention of claim 3, wherein the claim 1
Alternatively, the method for manufacturing a heat-insulated precast concrete foundation according to claim 2, wherein a step of arranging an exterior cover, a step of arranging a heat insulating material, and injecting concrete into the precast concrete base manufacturing formwork. And a step.

According to a fourth aspect of the present invention, in the method for manufacturing a heat-insulated precast concrete foundation according to the third aspect , the precast concrete foundation forming form is formed by laying the precast concrete foundation horizontally. A first step of arranging the exterior cover at the bottom of the precast concrete foundation production formwork, and a second step of arranging the heat insulating material on the exterior cover; A third step of injecting concrete from above the exterior cover and the heat insulating material.

The invention described in claim 5 is the first invention.
Or the method for manufacturing an insulated precast concrete foundation according to claim 2 , wherein the precast concrete foundation manufacturing form is configured to be able to manufacture the precast concrete foundation in a state where the rising portion is laid horizontally, A first step of arranging the exterior cover and the heat insulating material on the bottom of the precast concrete foundation manufacturing formwork, wherein the exterior cover and the heat insulating material are integrally formed in advance; And a second step of injecting concrete from above.

According to a sixth aspect of the present invention, in the method for manufacturing a heat-insulated precast concrete foundation according to the fifth aspect , a module size which is a minimum unit of a length of a building member is set in advance, and the exterior cover and the heat insulating material are provided. The material is formed in a length that is an integral multiple of the module size, and the number of the materials is arranged corresponding to the length of the precast concrete foundation to be manufactured.

[0015]

[Function] In general, heat insulating material is soft and easily damaged like foamed polyurethane, so it is not preferable to expose the heat insulating material to the outside surface of the building. In order to prevent this, insulation must be provided outside the building.

Therefore, the invention according to claim 1 is one in which the surface of the heat insulating material provided on the PC base is covered with an exterior cover. In this way, the foundation construction work is simplified at the construction site because the foundation is made of PC, and the work at the construction site does not increase because the heat insulating material is provided in advance. Since the heat insulating material is covered with the cover, it is excellent in appearance, strength, and prevention of dirt.

According to the second aspect of the present invention, since the outer cover is made of reinforced concrete, cracks and the like hardly occur even when the outer cover is extended thinly.

[0018]

Next, a third aspect of the present invention is a method for manufacturing a PC foundation by arranging an exterior cover, arranging a heat insulating material, and injecting concrete into a formwork for manufacturing a PC foundation.
This method can be used in a horizontal direction in which a PC foundation is laid in an upright state, or in a vertical direction in which a PC base is manufactured in an upright state,
Can be applied to any of the manufacturing methods.

[0020] In particular, the invention according to claim 4 is applied to a manufacturing method of a horizontal casting. First, an exterior cover is provided at the bottom of a formwork for manufacturing a PC base, and then a heat insulating material is provided. And then inject concrete. Here, when arranging the exterior cover, at the bottom of the formwork for manufacturing the PC base,
Inject material such as reinforced concrete directly into this PC
The exterior cover may be formed by a mold for manufacturing a base. Alternatively, a prefabricated exterior cover may be arranged at the bottom of the PC base manufacturing formwork.

In particular, the invention according to claim 5 is a method in which a heat insulating material is manufactured integrally with an outer cover, and this is arranged at the bottom of a formwork for manufacturing a PC base.

Further, in the invention according to claim 6 , the integrated exterior cover and the heat insulating material are formed in an integral multiple of the module size. The module size is set as a size that is a basic unit in an industrial building method such as a panel method, and the PC base is also manufactured with a length that is an integral multiple of the module size.

Therefore, for example, if the outer cover and the heat insulating material are formed to have a length that is one time the module size, and the length of the PC base is 1, 2,... By arranging a corresponding number of exterior covers and heat insulating materials, heat insulation of the PC foundation can be achieved.

[0024]

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

FIG. 1 is a perspective view of the basic structure according to the present embodiment, and FIG. 2 is a longitudinal sectional view of the basic structure of the present embodiment. In these figures, a PC cloth foundation 10 is erected between PC bottoms 30 installed on a root cutting portion 20.

The root cutting portion 20 is formed by digging the ground 100, and a PC bottom 30 is installed at a corner of the root cutting portion 20 and at a predetermined position.

Since the PC bottom 30 is a reinforced concrete plate having a reinforcing bar (not shown) therein, the work of disposing the reinforcing bar on the PC bottom 30 at the construction site can be omitted. . Further, the PC bottom board 30 has a smooth upper surface, so that when the PC cloth base 10 is erected, blackout for alignment can be performed on the upper surface.

Then, the PC bottom board 30 is connected to the root cutting section 20.
The mortar 22 is placed at the installation position of the PC bottom board 30, and the PC bottom board 30 is placed on the mortar 22. Then, an adjustment operation is performed by hitting the PC bottom plate 30 with a hanging arrow or the like so that the upper surface becomes substantially horizontal at a predetermined height. This operation is performed while checking the horizontal level and the height using a leveler using a water thread, a level, or a laser beam.

Next, a description will be given of the PC cloth base 10 installed between the PC bottom boards 30 thus installed. There are two types of PC cloth foundations 10, a PC cloth foundation 12 (right side in the figure) having recesses 11 formed at both ends, and a protrusion 13 formed at one end and a projection 13 at the other end. PC formed
There is a cloth foundation 14 (left side in the figure). And these P
Each of the C cloth bases 12 and 14 has a rising portion 16 and a footing portion 18.

Taking the PC cloth foundation 12 as an example,
The rising portion 16 supports the upper structure of the building at the upper end, and is formed in a rectangular parallelepiped shape with a predetermined thickness, and a reinforcing steel bar (not shown) is embedded therein and is made of concrete. Is formed with a concave portion 11 having a thick U-shaped cross section. When connecting the PC cloth foundations 12 linearly, the concave portions 11 are installed facing each other, a reinforcing bar is arranged inside the concave portions 11, concrete is cast, and the connecting portions are strengthened. It has become.

The footing portion 18 is for supporting the rising portion 16 upright, and is formed on both sides of the rising portion 16 with a reinforcing bar (not shown) inside and protruding laterally from the lower end. I have. The footing 18 is formed at the center of the rising portion 16, and the footing 18 is not formed on the side surface of the recess 11. Therefore, this PC cloth foundation 1
No. 2 is mounted on the PC bottom panel with the lower surface of the concave portion 11 as an erect portion. And this footing part 18
A gap is formed at a predetermined interval between the ground of the root cutting portion 20 and the concrete, and concrete can be poured into the gap.

The footing portion 18 has a concrete filling port 19 formed therein. The concrete filling port 19 is a plurality of rectangular holes penetrating from the upper surface to the lower surface of the footing portion 18. The concrete is poured from the concrete filling port 19, cured, and solidified. It can be fixed firmly.

Next, the PC cloth foundation 14 is different from the PC cloth foundation 12 in that the PC cloth foundation 14 has a projection 13 at one end.

The protrusion 13 is formed at a corner of the foundation.
To join the PC cloth base 12 at a right angle,
6 is formed at one end thereof so as to project at right angles to the axis. A reinforcing bar (not shown) protrudes from the front end face of the convex portion 13, and the PC cloth base 1 to which the reinforcing bar is to be joined.
When concrete is poured into this recess 11 and cured and solidified, the PC cloth foundation 12 and the PC
The fabric base 14 can be firmly connected.

The footing 18 is not formed at the end where the projection 13 is formed.
Is formed at the center of the rising portion 16. Other configurations are the same as those of the PC fabric base 12.

In this embodiment, any of the PC cloth bases 12,
14 also has a feature in that a heat insulating plate 40 is provided on the building outer surface of the rising portion 16. This will be described with reference to FIGS. FIG. 3 is a perspective view of the heat insulating plate. The heat insulating plate 40 is a rectangular thick plate made of a heat insulating part 42 and a cover part 44 that covers a part of the surface thereof. And this heat insulation plate 40
As shown in FIG. 1, a plurality of PC cloth
Is provided.

The heat insulating portion 42 is a heat insulating material made of foamed synthetic resin such as urethane foam, styrofoam, or foamed polyethylene. Such a heat insulating material generally has low strength, is inferior in appearance, and has a drawback that it is easily stained. Therefore, it is not preferable to provide the heat insulating material on the outer surface of the foundation and expose it as it is.

Therefore, in this embodiment, a part of the surface of the heat insulating portion 42 is covered by the cover portion 44. The cover portion 44 is formed by thinly striking reinforced concrete containing glass fiber. Cracks are likely to occur in concrete that is generally used because of its low tensile strength when struck thinly, but cracks are less likely to occur when reinforced concrete mixed with glass fiber is used. The cover portion 44 is provided so as to cover the surface of the heat insulating portion 42 except for a contact surface with the PC cloth base 10 (see FIG. 2) and a surface except for a joint surface between the heat insulating plates 40 (see FIG. 3). ing.

In addition, it is preferable that the surface exposed to the outside of the building be formed so as to be covered with the cover portion 44. For example, the heat-insulating portions 42 may be exposed at the joint surfaces between the heat-insulating plates 40, but the heat-insulating plates 40 provided at both ends of the PC fabric base 10 are in a state where the surfaces are also covered by the cover portions 44. Is preferred.

As shown in FIG. 3, the heat insulating plate 40 is manufactured by previously integrating the heat insulating portion 42 and the cover portion 44, and when the PC cloth base 10 is manufactured, It is preferable to integrate them with 10.

This will be described with reference to FIG. FIG.
It is a perspective view showing the formwork for manufacturing PC cloth foundation.
In the figure, a mold 200 is for manufacturing a PC cloth base 12, and includes an angle member 202, a shelf board 204, and a footing section 18 for forming a U-shaped joint 11.
And a projection 208 for forming the concrete filling port 19.

The mold 200 is provided with a PC
Fig. 4
As shown in (2), by placing concrete beforehand on the heat insulating plate 40 on the bottom surface, the heat insulating plate 40 can be integrally provided on the rising portion 16. Specifically, the heat insulating plate 40 is arranged with the cover 44 facing downward.

Also, when manufacturing the PC cloth base 14 having the convex portion 13, as shown in FIG. 1, the heat insulating plate 40 is provided on the outer surface of the building of the convex portion 13 as well.
It is preferable to dispose the heat insulating plate 40 at a corresponding position in the PC basic manufacturing form.

Further, it is preferable that the heat insulating plate 40 is formed in a size of an integral multiple of the module size. That is, a module size that is the minimum unit of the length of the building member is set in advance, and the heat insulating plate 40 is manufactured with a length that is an integral multiple of the module size. For example, if the heat insulating plate 40 is formed with a length that is one time the module size,
When the length of the PC base is 1, 2,..., N times the module size, a corresponding number of heat insulating plates 40 are arranged on the bottom surface of the mold 200.

By doing so, one kind of heat insulating plate 4
A value of 0 can accommodate various sizes of PC bases.

Then, the PC cloth base 10 on which the heat insulating plate 40 is integrated as described above is placed on the upper surface of the PC bottom board 30 by marking the installation position, positioning the PC cloth base 30, and bridging between the PC bottom boards 30. You. Since the footing portion 18 is formed integrally with the PC cloth base 10, there is no need to construct a footing at a building site.

However, concrete is poured into the concrete filling port 19 formed in the footing section 18, cured and solidified, and the footing section 18 is moved to the ground 100.
It only needs to be fixed to At this time, a gap is formed between the ground 100 and the footing portion 18, so that when the concrete is poured, the concrete that has entered through the gap fills the concrete filling port 19 from below and overflows from the upper end. The concrete can be surely filled by confirming that it has come out. Compared with the work of constructing the entire footing, this work requires less curing time because the concrete to be cast is small, and the concrete placing and curing work can be simplified. When the concrete is poured into the concrete filling port 19, cured and solidified, the footing portion 18 can be firmly fixed to the ground 100.

Then, when the PC cloth base 10 is constructed,
As shown in FIG. 2, a floor slab 50 is installed inside the building to form a floor of a basement. Specifically, this floor slab 50
The PC slab 10 is placed on the footing portion 18 of the PC cloth base 10, and the central portion of the floor slab 50 is supported by the PC support bottom 32 as shown in FIG. 2. Here, the PC support bottom plate 32 has the same configuration as the PC bottom plate 30, and a description thereof will be omitted.

In the above embodiment, the form 200
Is a side-moulded type manufactured by laying a PC base horizontally, but is not limited to this, and a so-called vertical-shaped formwork may be used.

Alternatively, in the above embodiment, the heat insulating portion 4
Although the heat insulating plate 40 is manufactured by integrally providing the cover portion 44 with the cover 2, the present invention is not limited to this. The heat insulating plate 40 is formed when the PC base is manufactured. You may. To do so, for example,
First, a reinforced concrete containing glass fiber is cast thinly on a formwork 200 shown in FIG. 4, a heat insulating material such as urethane foam is arranged thereon, and concrete is cast from above the concrete. Will be manufactured.

The cover 44 may be provided with a tile or the like as an exterior material in advance, or may be formed with a tile pattern or the like. In this way, various types of PC bases can be manufactured by preparing several types of cover parts and selecting a desired design. Further, this cover portion 44
In addition to reinforced concrete containing glass fiber, an asbestos board may be pressed and manufactured.

[0052]

As described above, according to the first aspect of the present invention, since the foundation is made of PC, the work of constructing the foundation at the construction site can be simplified, and the heat insulating material is integrally provided in advance. Thus, the heat insulation of the foundation can be achieved without increasing the work at the construction site, and by covering the heat insulating material with the exterior cover, excellent effects can be achieved in terms of appearance, strength, and prevention of dirt.

According to the second aspect of the present invention, since the outer cover is made of reinforced concrete,
There is an effect that cracks and the like hardly occur.

[0054]

Next, according to each of the third to sixth aspects of the present invention, the heat-insulating PC having the above effects is provided.
The foundation can be manufactured.

In particular, according to the fifth aspect of the present invention, since the heat insulating material is integrated with the outer cover and manufactured, the manufacturing process of the heat insulating PC base can be simplified.

Further, according to the sixth aspect of the present invention, if one kind of exterior cover and heat insulating material are prepared, they can be integrally provided on PC bases of various sizes.

[Brief description of the drawings]

FIG. 1 is a perspective view of a basic structure according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a basic structure according to an embodiment of the present invention.

FIG. 3 is a perspective view of a heat insulating plate in the embodiment.

FIG. 4 is a perspective view showing a mold for manufacturing a PC cloth base in the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 PC cloth foundation 16 Rise 18 Footing part 30 PC bottom 40 Heat insulation plate 42 Heat insulation part 44 Cover part 200 Formwork

──────────────────────────────────────────────────続 き Continuation of front page (58) Surveyed field (Int.Cl. ⁷ , DB name) E02D 27/01 101 B28B 23/00

Claims (6)

(57) [Claims] 1. An erecting support for a building standing upright in a vertical direction.
Section and a section provided integrally with the building exterior
The heating material and the exterior cover covering the surface of the heat insulating material must be
Insulated precast concrete foundation
In the rising portion, a hood projecting laterally from a lower end portion on both sides is provided.
A footing portion is provided integrally with the footing portion, and a
A cleat filling port is formed, and the heat insulating material and the outer cover cover the footing portion.
Characterized by being provided at a predetermined distance from the surface
Thermal precast concrete foundation. 2. The heat-insulated precast concrete foundation according to claim 1, wherein the exterior cover is formed by thinly extending reinforced concrete. 3. The method for producing a heat-insulated precast concrete foundation according to claim 1 , wherein an outer cover is disposed on the precast concrete foundation production formwork, and a heat insulating material is disposed. And a step of injecting concrete. A method for producing a heat-insulated precast concrete foundation, comprising: 4. The method for producing a heat-insulated precast concrete foundation according to claim 3 , wherein the precast concrete foundation production form is configured to be able to produce the precast concrete foundation in a state where the upright portion is laid sideways, A first step of disposing the exterior cover at the bottom of the precast concrete foundation manufacturing formwork, a second step of disposing the heat insulating material on the exterior cover, and a step of disposing the heat insulating material on the exterior cover and the heat insulating material And a third step of injecting the concrete from the concrete. 5. The method for manufacturing a heat-insulated precast concrete foundation according to claim 1 or 2 , wherein the precast concrete foundation manufacturing formwork is configured such that the precast concrete is laid horizontally. A first step of arranging the exterior cover and the heat insulating material at the bottom of the precast concrete foundation manufacturing formwork, wherein the exterior cover and the heat insulating material are configured in advance so that the foundation can be manufactured; and ,
And a second step of injecting concrete from above the exterior cover and the heat insulating material. 6. The method for manufacturing a heat-insulated precast concrete foundation according to claim 5 , wherein a module size that is a minimum unit of the length of the building member is set in advance, and the exterior cover and the heat insulating material are an integer of the module size. A method for producing a heat-insulated precast concrete foundation, characterized in that the precast concrete foundation is formed in a double length and the number corresponding to the length of the precast concrete foundation to be produced is arranged.