JP7487490B2 - Foundation structure and construction method thereof - Google Patents

Description

The present invention relates to a foundation structure with thermal insulation functions.

Patent Document 1 discloses a foundation structure that includes a foundation, a rectangular plate-shaped insulating material installed adjacent to the foundation, and an anti-termite sheet attached to the insulating material. The anti-termite sheet is attached to the insulating material so as to cover the bottom and top surfaces and one of the main surfaces of the insulating material. The insulating material is installed with its bottom surface abutting against the upper surface of the base of the foundation and its other main surface abutting against the rising wall surface of the foundation.

JP 2004-124705 A

If the insulation is installed without abutting the top surface of the base of the foundation, there is a risk that termites may enter the insulation through the gap between the insulation and the rising wall surface, or that termites may enter the foundation structure through the gap.

The present invention was made in consideration of the above-mentioned circumstances, and its purpose is to provide a technology that prevents termites from invading the interior of insulation materials and foundation structures.

(1) The foundation structure according to the present invention comprises a foundation having a rise, a rectangular plate-shaped main body whose main surface abuts against the outer wall surface of the rise, and an anti-termite sheet-attached insulation material having a protruding piece that protrudes from an edge where the main surface and top surface of the main body intersect and is attached to the outer wall surface or the top surface of the rise. The main body has a rectangular plate-shaped insulation material and an anti-termite sheet that covers the peripheral surface of the insulation material. The protruding piece is formed of the anti-termite sheet.

The periphery of the insulation is covered with anti-termite sheeting. This prevents termites from penetrating inside the insulation. In addition, the protruding pieces formed from the anti-termite sheeting and protruding from the main body are attached to the outer wall surface of the riser, preventing termites from penetrating inside the foundation structure through the gap between the insulation and the riser.

(2) The anti-termite sheet covering the heat insulating material may be extended to form the protruding piece.

The protruding piece may be formed by an anti-termite sheet that is attached separately to the anti-termite sheet that covers the insulation material, or may be formed by extending the anti-termite sheet that covers the insulation material.

(3) The protruding piece may be attached to the upper surface of the riser and sandwiched between the upper surface and the base or the column base metal fitting.

The protruding piece is sandwiched between the top surface of the riser and the base or column base fittings, preventing the protruding piece from falling off the riser due to aging.

(4) The foundation structure according to the present invention may include a plurality of the anti-termite sheet-covered insulation materials arranged adjacent to each other in the horizontal direction. The anti-termite sheet-covered insulation materials have an extension extending laterally from the protruding piece. In two adjacent anti-termite sheet-covered insulation materials, the extension of one of the anti-termite sheet-covered insulation materials overlaps with the protruding piece of the other anti-termite sheet-covered insulation material.

By overlapping the extension of one anti-termite sheet-covered insulation material with the protruding piece of the other anti-termite sheet-covered insulation material, termites are prevented from invading the interior of the foundation structure through between the two anti-termite sheet-covered insulation materials.

(5) The foundation structure according to the present invention may further include an adhesive positioned between the protruding piece and the rising portion, the adhesive forming a bead extending in the horizontal direction.

The horizontally extending bead formed by the adhesive prevents termites from climbing up through the gap between the anti-termite sheet insulation and the riser.

(6) The lower part of the insulation material with anti-termite sheet may be buried in the ground. The foundation structure according to the present invention further includes an untreated insulation material placed on the exposed upper surface of the insulation material with anti-termite sheet.

The above configuration allows for a reduction in the amount of anti-termite sheet used.

(7) The construction method of the foundation structure according to the present invention is a construction method of a foundation structure in which a protective sheet-attached insulation material is attached to a foundation. The protective sheet-attached insulation material has a rectangular plate-shaped main body and a protruding piece protruding from the main body. The main body has a rectangular plate-shaped insulation material and an anti-termite sheet covering the peripheral surface of the insulation material. The protruding piece is formed of the anti-termite sheet. The construction method of the foundation structure includes a first step of pouring a foundation having a rise, a second step of abutting the main surface of the main body against the outer wall surface of the rise and installing the anti-termite sheet-attached insulation material, a third step of applying adhesive to the protruding piece of the insulation material, and a fourth step of attaching the protruding piece to the outer wall surface or upper surface of the rise.

The present invention can also be seen as a construction method for foundation structures.

(8) The construction method for a foundation structure according to the present invention is a construction method for a foundation structure in which a protective sheet-attached insulation material is attached to a foundation. The protective sheet-attached insulation material has a rectangular plate-shaped main body and a protruding piece protruding from the main body. The main body has a rectangular plate-shaped insulation material and an anti-termite sheet covering the peripheral surface of the insulation material. The protruding piece is formed of the anti-termite sheet. The construction method for a foundation structure includes a first step of pouring a foundation having a rise, a second step of applying adhesive to the protruding piece of the insulation material, a third step of attaching the protruding piece to the outer wall surface of the rise, and a fourth step of abutting the main surface of the main body against the outer wall surface of the rise to install the anti-termite sheet-attached insulation material.

The protruding piece can be attached to the rising exterior wall surface before installing insulation with anti-termite sheeting.

The foundation structure of the present invention can prevent termites from invading the insulation material and the foundation structure.

FIG. 1 is a perspective view of a portion of a foundation structure 10 . FIG. 2 is an explanatory diagram illustrating the process of pouring the slab 11. 3A is a perspective view of the insulating material 20, FIG. 3B is a vertical cross-sectional view of the insulating material 15 with an anti-termite sheet, and FIG. 3C is a perspective view of the insulating material 15 with an anti-termite sheet. FIG. 4 is an explanatory diagram illustrating the manufacturing process of the anti-termite sheet-attached insulation material 15. FIG. 5 is a vertical cross-sectional view of the foundation structure 10. FIG. 6 is an explanatory diagram for explaining the construction of the foundation structure 10. FIG. 7 is a vertical cross-sectional view of a foundation structure 10 in the first modified example. FIG. 8 is a cross-sectional view of a foundation structure 10 in the second modification. FIG. 9 is an explanatory diagram for explaining a manufacturing method of the anti-termite sheet-attached insulation material 15 according to another modified example. FIG. 10 is an explanatory diagram illustrating a manufacturing method of the anti-termite sheet-attached insulation material 15 according to another modified example. FIG. 11 is a cross-sectional view of a foundation structure 10 in the third modification.

The following describes an embodiment of the present invention. Note that the embodiment described below is merely one example of the present invention, and it goes without saying that the embodiment of the present invention can be modified as appropriate without departing from the gist of the present invention.

Figure 1 is a perspective view of a portion of a foundation structure 10 that supports the building frame (not shown). The foundation structure 10 includes a slab 11 and an anti-termite sheet-covered insulation material 15 attached to the slab 11. Note that a slab foundation may be used instead of the slab 11.

The slab foundation 11 includes a footing 12, a riser 13, and a number of anchor bolts 14. The footing 12 is buried in the ground. The riser 13 protrudes upward from the footing 12. In other words, the riser 13 protrudes upward from the ground.

The anchor bolt 14 has an embedded portion (not shown) embedded in the riser 13, and a bolt portion protruding upward from the embedded portion. As shown in FIG. 1, only the bolt portion of the anchor bolt 14 is visible in the cast strip footing 11. In the example shown in FIG. 1, one anchor bolt 14 has two bolt portions.

The bolt portion of the anchor bolt 14 protrudes upward from the upper surface of the riser 13. The multiple anchor bolts 14 are arranged, for example, at equal intervals along the direction in which the riser 13 extends (horizontal direction).

The base 16 (Fig. 5) is placed on the upper surface of the riser 13. The base 16 has an insertion hole through which the bolt portion of the anchor bolt 14 is inserted. The base 16 is fixed to the slab 11 by fastening a nut (not shown) to the bolt portion inserted into the insertion hole. A number of columns (not shown) are placed on the upper surface of the base 16 and fixed to the base 16 using fasteners (not shown) such as bolts and nuts. The columns and base 16 form the building frame. Note that instead of the base 16, a column base metal fitting may be attached to the upper surface of the riser 13 using the anchor bolt 14. The columns are fixed to the column base metal fittings.

As shown in FIG. 2, for example, the slab footing 11 is constructed by laying crushed stone (not shown) in a groove 51 in the ground, pouring mortar concrete 52, setting up a formwork 53 along the groove 51, placing reinforcing bars (not shown) held by the formwork 53, setting up anchor bolts 14 using support plates 54, and then pouring ready-mixed concrete into the formwork 53. The process of pouring the slab footing 11 is an example of the first process.

As shown in FIG. 3(B), the anti-termite sheet-attached insulation material 15 comprises an insulation material 20, and a first anti-termite sheet 31 and a second anti-termite sheet 32 attached to the insulation material 20.

As shown in FIG. 3A, the heat insulating material 20 is a rectangular plate having a first main surface 21 and a second main surface 22 that are parallel to each other, a top surface 23 and a bottom surface 24 that are parallel to each other, and a pair of side surfaces 25, 26 that are parallel to each other. The heat insulating material 20 is formed by foaming, for example, one of the resins listed below, or multiple resins. Usable resins include general-purpose plastics such as polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), polystyrene (PS), polyvinyl acetate (PVAc), fluororesin (polytetrafluoroethylene), acrylonitrile butadiene styrene (ABS) resin, acrylonitrile styrene (AS) resin, and polymethyl methacrylate (PMMA). In addition, examples of resins that can be used include engineering plastics such as polyamide (PA), polyacetal (POM), polycarbonate (PC), modified polyphenylene ether (PPE), polybutylene terephthalate (PBT), polyethylene terephthalate (PET), and cyclic polyolefin (COP). In addition, examples of resins that can be used include thermosetting resins such as polyimide (PI), phenolic resin (PF), epoxy resin (EP), melamine resin (MF), urea resin (UF), unsaturated polyester resin (UP), and alkyd resin. Among the above resins, polystyrene (PS) and acrylonitrile styrene (AS) resins, which are included in general-purpose plastics, or mixtures thereof are preferred because they have excellent insulation performance and suitable mechanical strength when foamed. In addition, the insulation material 20 can be manufactured by foaming the above resins using known methods such as extrusion foaming and in-mold foaming using a mold, but extrusion foaming products are preferred from the viewpoints of insulation performance and mechanical strength.

The thickness of the insulation material 20 is, for example, within a range of several tens of mm to a hundred and several tens of mm. The width of the insulation material 20 is within a range of several tens of cm to a hundred and several tens of cm. The height of the insulation material 20 is within a range of several tens of cm to a hundred and several tens of cm, matching the height of the rise 13 of the slab 11. The insulation material 20 is used by cutting a standard length original plate, for example, 15 mm to 200 mm in thickness, 800 mm to 1000 mm in width, and 900 mm to 3000 mm in length, according to the specifications of the building.

The first anti-termite sheet 31 and the second anti-termite sheet 32 are a single sheet or a laminated sheet consisting of multiple layers, and have a thickness in the range of approximately 10 μm to 800 μm. Preferably, the first anti-termite sheet 31 and the second anti-termite sheet 32 have a thickness in the range of approximately 10 μm to 400 μm. More preferably, the first anti-termite sheet 31 and the second anti-termite sheet 32 have a thickness in the range of approximately 40 μm to 80 μm. For example, the first anti-termite sheet 31 and the second anti-termite sheet 32 are formed by laminating an ethylene-vinyl acetate copolymer (EVA) resin having a thickness of approximately 25 μm as an adhesive layer onto a polyethylene terephthalate resin sheet having a thickness of approximately 50 μm.

The first anti-termite sheet 31 is attached to the first main surface 21, top surface 23, and bottom surface 24 of the insulation material 20 using an adhesive such as hot melt (FIGS. 4(A) and (B)). The end 33 of the first anti-termite sheet 31 attached to the insulation material 20 protrudes from the edge where the top surface 23 and the second main surface 22 of the insulation material 20 intersect. The end 33 of the first anti-termite sheet 31 is attached to the end 34 of the second anti-termite sheet 32 to form a protruding piece 42 that is attached to the rise 13 of the slab 11. Details will be described later. Note that the long anti-termite sheet may be cut to a predetermined size and shape using a cutting tool and then attached to the insulation material 20 as the first anti-termite sheet 31, or the long anti-termite sheet may be attached to the insulation material 20 and then cut to form the first anti-termite sheet 31. In addition, the first anti-termite sheet 31 does not have to be attached to the entire bottom surface 24 of the heat insulating material 20. The first anti-termite sheet 31 is attached to the bottom surface 24 at a distance from the second main surface 22, taking into account the attachment of the second anti-termite sheet 32 (FIG. 4(D)).

The second anti-termite sheet 32 is attached to the second main surface 22 using an adhesive such as hot melt, and is also attached to the end of the first anti-termite sheet 31 attached to the bottom surface 24 of the insulation material 20 using the same adhesive (FIGS. 4(C) and (D)). That is, the second anti-termite sheet 32 overlaps with the first anti-termite sheet 31 at the bottom surface 24. In this way, the first main surface 21, the second main surface 22, the bottom surface 24, and the top surface 23 of the insulation material 20 are covered by the anti-termite sheets 31 and 32. The first anti-termite sheet 31 and the second anti-termite sheet 32 covering the insulation material 20 prevent the insulation material 20 from being eaten by termites.

The end 34, which is one end of the second anti-termite sheet 32, protrudes from the edge where the second main surface 22 and the top surface 23 of the insulating material 20 intersect, and is attached to the end 33 of the first anti-termite sheet 31 using the above-mentioned adhesive. The attached ends 33, 34 form a protruding piece 42. That is, the anti-termite sheet-attached insulating material 15 has a rectangular plate-shaped main body 41 and a protruding piece 42 protruding from the main body 41. The protruding length of the protruding piece 42 is about 100 mm. Note that the long anti-termite sheet may be cut to a predetermined size and shape using a cutting tool and then attached to the insulating material 20 as the second anti-termite sheet 32, or the long anti-termite sheet may be attached to the insulating material 20 and then cut to form the second anti-termite sheet 32.

As shown in FIG. 3(C), the anti-termite sheet-covered insulation material 15 has a protruding piece 42 and an extending portion 43 extending laterally from the main body 41. Specifically, the extending portion 43 extends laterally from the protruding piece 42, and also extends laterally from a portion of the insulation material 20 corresponding to the side where the top surface 23 and the side surface 26 intersect. The extending length of the extending portion 43 is, for example, within a range of a dozen mm to a hundred and several tens of mm. As shown in FIG. 1, when multiple anti-termite sheet-covered insulation materials 15 are arranged adjacent to each other in the horizontal direction, the extending portion 43 overlaps adjacent anti-termite sheet-covered insulation materials 15. Details will be described later.

As shown in FIG. 5, the anti-termite sheet-attached insulation material 15 is arranged so that the main surface of the rectangular plate-shaped main body 41, which corresponds to the second main surface 22 of the insulation material 20, is in contact with the outer wall surface 17 of the rise 13 of the slab 11. The protruding piece 42 of the anti-termite sheet-attached insulation material 15 is attached to the outer wall surface 17 of the rise 13 of the slab 11 using a silicone adhesive 18. The silicone adhesive 18 is applied from one end to the other end of the protruding piece 42 and the extension portion 43 in the horizontal direction. The silicone adhesive 18 is also applied to the protruding piece 42 in three rows in the vertical direction. The silicone adhesive 18 forms three rows of beads extending horizontally. Each row is arranged vertically at intervals of about 25 mm, for example. These three rows of beads prevent termites from reaching the foundation 16 from between the anti-termite sheet-attached insulation material 15 and the rise 13 of the slab 11. The silicone adhesive may also be applied to the portion of the extension 43 that extends laterally from the top surface 23 of the insulation material 20. The silicone adhesive 18 is a silicone adhesive in the broad sense, including modified silicone adhesives.

The construction of the anti-termite sheet-covered insulation material 15 will be described in detail with reference to Figures 1 and 6. First, as shown in Figure 6, after removing the formwork from the foundation structure 10, the worker levels the anti-termite sheet-covered insulation material 15 on the exterior wall surface 17 of the riser 13 (Figure 6 (A)). Next, the worker aligns the upper end of the anti-termite sheet-covered insulation material 15 to the level and places the anti-termite sheet-covered insulation material 15 (Figure 1).

Next, the worker applies adhesive to the main surface of the body 41 of the anti-termite sheet-attached insulation material 15 and fixes the anti-termite sheet-attached insulation material 15 by abutting it against the exterior wall surface 17 of the rise 13 of the slab 11 (FIG. 6(B)). The process in which the worker attaches the anti-termite sheet-attached insulation material 15 to the slab 11 is an example of the second and fourth steps.

Next, the worker applies the silicone adhesive 18 in three rows to the protruding pieces 42 and the extensions 43 of the anti-termite sheet insulation material 15. The process in which the worker applies the silicone adhesive to the protruding pieces 42 is an example of the third and second steps.

The worker attaches the protruding piece 42 coated with the silicone adhesive 18 to the outer wall surface 17 of the rise 13 of the slab 11 (FIG. 6(C)), and attaches the extension 43 to the protruding piece 42 of another adjacent anti-termite sheet-attached insulation material 15. The process in which the worker attaches the protruding piece 42 to the rise 13 of the slab 11 is an example of the fourth and third steps.

Although not shown in Figures 1 and 6, a decorative cover that covers the anti-termite sheet-covered insulation material 15 may be attached to the slab 11.

[Effects of the embodiment]
In this embodiment, the peripheral surface of the heat insulating material 20 is covered with the first anti-termite sheet 31 and the second anti-termite sheet 32. Therefore, termites are prevented from invading the inside of the heat insulating material 20.

In addition, the protruding piece 42 formed from the anti-termite sheet and protruding from the main body is attached to the outer wall surface 17 of the rise 13 of the slab 11, preventing termites from invading the interior of the foundation structure 10 between the anti-termite sheet-covered insulation material 15 and the rise 13.

Of two adjacent anti-termite sheet-covered insulation materials 15, the extension 43 of the protruding piece 42 of one of the anti-termite sheet-covered insulation materials 15 is attached to overlap the protruding piece 42 of the other anti-termite sheet-covered insulation material 15, thereby preventing termites from entering the interior of the foundation structure 10 through the gap between the two anti-termite sheet-covered insulation materials 15.

The horizontally extending bead formed by the silicone adhesive 18 prevents termites from climbing up between the anti-termite sheet insulation material 15 and the rise 13 of the slab 11.

[Variation 1]
In the above embodiment, an example has been described in which the protruding pieces 42 of the anti-termite sheet-attached insulation material 15 are attached to the outer wall surface 17 of the rising 13 of the strip footing 11. However, the protruding pieces 42 may be attached to the upper surface of the rising 13 as shown in FIG. 7. The worker applies the silicone adhesive 18 to the protruding pieces 42 in a row in the same manner as in the above embodiment, and then attaches the protruding pieces 42 to the upper surface of the rising 13 of the strip footing 11. Then, the worker places the base 16 on the protruding pieces 42 and fixes the base 16 to the rising 13 of the strip footing 11 with nuts fastened to the bolt parts of the anchor bolts 14. That is, the protruding pieces 42 are sandwiched between the rising 13 of the strip footing 11 and the base 16. Therefore, termites are prevented from invading the base 16 between the anti-termite sheet-attached insulation material 15 and the rising 13 of the strip footing 11.

[Variation 2]
In this modified example, as shown in FIG. 8, an example is described in which an untreated insulating material 60 with no anti-termite sheet attached is placed on an insulating material 15 with an anti-termite sheet attached.

The anti-termite sheet-covered insulation material 15 is attached to the slab 11 in the same manner as in the embodiment, with the upper part exposed from the ground by several centimeters to several tens of centimeters. Then, the untreated insulation material 60 is placed on the upper surface of the anti-termite sheet-covered insulation material 15 and fixed to the riser 13 of the slab 11.

In this modified example, of the amount of insulation required for insulation, anti-termite sheet-attached insulation material 15 is used in the area where anti-termite protection is required (lower part), and untreated insulation material 60 is used in the area where anti-termite protection is not required (upper part). Therefore, the amount of anti-termite sheet used is reduced compared to when only anti-termite sheet-attached insulation material 15 is used.

[Variation 3]
In this modified example, a construction method for attaching anti-termite sheet-attached insulation material 15 to a strip footing 11 will be described in cases where space for attaching the protruding piece 42 to the outer wall surface 17 of the rise 13 of the strip footing 11 cannot be secured due to sashes or the like, or where a foundation drain has been installed in advance in a renovation project, etc. Note that the configuration other than that described below is the same as that described in the embodiment.

As shown in FIG. 11, the worker folds back the protruding piece 42 so that the protruding piece 42 abuts against the main surface of the main body 41. Then, the worker applies silicone adhesive 18 to the protruding piece 42 in three rows on the side opposite to the side that abuts against the main body 41. Alternatively, the worker applies silicone adhesive 18 to the protruding piece 42 in three rows, and then folds back the protruding piece 42. The worker attaches the protruding piece 42 to which the silicone adhesive 18 has been applied to the rising portion 13, and attaches the anti-termite sheet insulation material 15 to the rising portion 13.

By installing the anti-termite sheet-backed insulation material 15 as in this modified example, even if it is difficult to install the anti-termite sheet-backed insulation material 15 using the installation method of the above-mentioned embodiment, the anti-termite sheet-backed insulation material 15 can be installed by attaching the protruding piece 42 to the exterior wall surface 17 of the riser 13.

[Other Modifications] In the above embodiment, an example was described in which the end 33 of the first anti-termite sheet 31 and the end 34 of the second anti-termite sheet 32 are attached to form the protruding piece 42. However, as shown in FIG. 9, the protruding piece 42 may be formed by a third anti-termite sheet 35 separate from the first anti-termite sheet 31 and the second anti-termite sheet 32. To explain in more detail, the worker attaches the first anti-termite sheet 31 to the first main surface 21, top surface 23, and bottom surface 24 of the insulation material 20 using an adhesive (FIG. 9(A)). Next, the worker attaches the second anti-termite sheet 32 to the second main surface 22 of the insulation material 20 and the first anti-termite sheet 31 attached to the top surface 23 and bottom surface 24 using an adhesive (FIG. 9(B)). Then, the worker attaches the lower end of the third anti-termite sheet 35 to the second anti-termite sheet 32 or the first anti-termite sheet 31 at a position corresponding to the upper end of the second main surface 22 or the first main surface 21 of the insulation material 20. In the example shown in Figures 9 (C) and (D), the third anti-termite sheet 35 is attached to the second anti-termite sheet 32. The upper part of the third anti-termite sheet 35 forms a protruding piece 42 that is attached to the rise 13 of the slab footing 11. In this way, the protruding piece 42 may be formed by the separately attached third anti-termite sheet 35.

In the above embodiment, an example in which the first anti-termite sheet 31 is attached to the top surface 23 of the insulating material 20 has been described. However, the second anti-termite sheet 32 may be attached to the top surface 23 of the insulating material 20. To explain in detail, as shown in FIG. 10(A), the worker uses an adhesive to attach the first anti-termite sheet 31 to the bottom surface 24 and the first main surface 21 of the insulating material 20 so that it extends beyond the edge where the first main surface 21 and the top surface 23 of the insulating material 20 intersect. Next, as shown in FIG. 10(B), the worker uses an adhesive to attach the second anti-termite sheet 32 to the first anti-termite sheet 31 attached to the bottom surface 24 of the insulating material 20, the second main surface 22 and the top surface 23 of the insulating material 20, and the end portion 33, which is the upper end portion of the first anti-termite sheet 31. The end 33 of the first anti-termite sheet 31 and the end 34, which is the upper end of the second anti-termite sheet 32 attached to the end 33, form a protruding piece 42 that is attached to the rise 13 of the slab 11. In this manner, an anti-termite sheet-attached insulation material 15 having a protruding piece 42 may be manufactured.

In the above embodiment, an example was described in which the extension portion 43 is formed by extending from the protruding piece 42 and the main body 41. That is, an example was described in which the anti-termite sheet-attached insulation material 15 already has the extension portion 43. However, the extension portion 43 may be formed by attaching the anti-termite sheet-attached insulation material 15 to the strip footing 11 when the anti-termite sheet-attached insulation material 15 is attached to the strip footing 11. To explain in detail, the worker arranges multiple anti-termite sheet-attached insulation materials 15 in the horizontal direction and attaches them to the rise 13 of the strip footing 11. Then, the worker attaches the anti-termite sheet to the protruding piece 42 and the main body 41 to form the extension portion 43. Even if the extension portion 43 is formed in this way, termites are prevented from invading the inside of the foundation structure 10 between two adjacent anti-termite sheet-attached insulation materials 15.

In the above embodiment, an example in which the pair of side surfaces 25, 26 of the insulation material 20 are not covered with anti-termite sheets has been described. However, the first anti-termite sheet 31 or the second anti-termite sheet 32 may be attached to one or both of the side surfaces 25 and 26 of the insulation material 20. For example, after attaching the first anti-termite sheet 31 to the side surfaces 25, 26, the worker attaches the second anti-termite sheet 32 to the first anti-termite sheet 31 attached to the side surfaces 25, 26 using an adhesive such as hot melt. By attaching the first anti-termite sheet 31 or the second anti-termite sheet 32 to the side surfaces 25, 26 of the insulation material 20, termites are prevented from entering the insulation material 20 and eating the insulation material 20.

In the above embodiment, an example was described in which the main body 41 of the anti-termite sheet insulation material 15 is attached to the rise 13 of the slab 11, and then the protruding piece 42 is attached to the rise 13. However, the main body 41 may be attached to the rise 13 after the protruding piece 42 is attached to the rise 13.

Reference Signs List 10: Foundation structure 11: Strip footing 13: Rise 15: Anti-termite sheet attached heat insulating material 18: Silicone adhesive 20: Heat insulating material 21: First main surface 22: Second main surface 25, 26: Side 41: Main body 42: Protruding piece

Claims (7)

A foundation having a rise;
an anti-termite sheet-attached insulation material comprising an insulation material whose peripheral surface is covered with an anti-termite sheet, the insulation material having a rectangular plate-shaped main body whose main surface abuts against the rising outer wall surface, and a protruding piece extending from the anti-termite sheet of the main body, protruding from a side where the main surface of the main body intersects with a top surface, and abutting against the rising outer wall surface or the top surface;
an adhesive located between the protruding piece and the rising portion, the adhesive forming a horizontally extending bead to attach the protruding piece to the rising portion,
The protruding piece is formed of an anti-termite sheet,
The anti-termite sheet-attached insulation material does not have a protruding piece attached to the foundation on the lower part of the main body. The foundation structure according to claim 1, in which the anti-termite sheet covering the insulation material extends to form the protruding piece. The foundation structure according to claim 1 or 2, in which the protruding piece is attached to the upper surface of the rise and is sandwiched between the upper surface and the base or the column base metal fitting. The insulation material is provided with a plurality of the anti-termite sheet-attached insulation materials arranged adjacent to each other in a horizontal direction,
The anti-termite sheet-attached insulation material has an extension portion extending laterally from the protruding piece,
A foundation structure as described in any one of claims 1 to 3, wherein, in two adjacent anti-termite sheet-covered insulation materials, the extension portion of one of the anti-termite sheet-covered insulation materials is overlapped with the protruding piece of the other anti-termite sheet-covered insulation material. The bottom of the insulation material with anti-termite sheet is buried in the ground.
The foundation structure according to any one of claims 1 to 4, further comprising an untreated insulating material placed on the exposed upper surface of the anti-termite sheet-attached insulating material. A method for constructing a foundation structure using an anti-termite sheet-covered insulation material, the method comprising: a rectangular plate-shaped main body made of an insulation material whose peripheral surface is covered with an anti-termite sheet; and a protruding piece extending from the anti-termite sheet of the main body and protruding from an edge where a main surface and a top surface of the main body intersect, the protruding piece being formed from the anti-termite sheet; and the method comprising the steps of:
A first step of pouring a foundation having a rise;
A second step of installing the anti-termite sheet-attached insulation material by abutting the main surface of the main body against the rising outer wall surface;
a third step of applying an adhesive to the protruding piece to form a bead;
A fourth step of attaching the protruding piece to the outer wall surface or upper surface of the rising portion. A method for constructing a foundation structure using an anti-termite sheet-covered insulation material, the method comprising: a rectangular plate-shaped main body made of an insulation material whose peripheral surface is covered with an anti-termite sheet; and a protruding piece extending from the anti-termite sheet of the main body and protruding from an edge where a main surface and a top surface of the main body intersect, the protruding piece being formed from the anti-termite sheet; and the method comprising the steps of:
A first step of pouring a foundation having a rise;
A second step of applying an adhesive to the protruding piece to form a bead;
a third step of attaching the protruding piece to the rising outer wall surface;
A construction method for a foundation structure comprising: a fourth step of installing the anti-termite sheet-covered insulation material by abutting the main surface of the main body against the rising outer wall surface.

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