JP7487491B2 - 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 insulation material installed adjacent to the foundation, an anti-termite sheet attached to the insulation material, and a concrete floor. The insulation material and the anti-termite sheet are arranged on the outer wall surface side of the foundation rise, and the concrete floor is arranged on the inner wall surface side of the rise.

JP 2004-124705 A

When insulation is placed on the inner wall surface of the riser, in addition to termites eating through the inside of the insulation, termites may also enter the interior of the foundation structure through the gaps between the insulation and the riser, or between the insulation and the concrete floor.

The present invention was made in consideration of the above-mentioned circumstances, and its purpose is to provide a technology that can prevent the intrusion of termites in foundation structures in which insulation is placed on the inner wall side of the foundation rise.

(1) The foundation structure according to the present invention comprises a foundation having a rise, a concrete floor poured on the inner wall surface side of the rise, and a sheet-applied insulation material having a main body and a protruding piece. The main body is a rectangular plate with one side abutting the inner wall surface of the rise. The protruding piece extends from the main body and is attached to the rise. The main body is formed of a rectangular plate-shaped insulation material and an anti-termite sheet covering the insulation material, and the protruding piece is formed of the anti-termite sheet.

The insulation material of the anti-termite sheet insulation material is covered with the anti-termite sheet. This prevents termites from invading the inside of the insulation material. In addition, the protruding pieces formed from the anti-termite sheet and extending from the main body are attached to the foundation rise and the concrete floor, preventing termites from invading the inside of the foundation structure between the main body and the rise or between the main body and the concrete floor.

(2) The one surface of the body of the anti-termite sheet-covered insulation material is one of a pair of main surfaces of the body, and the end surface of the concrete floor abuts the other main surface of the body of the anti-termite sheet-covered insulation material, and the protruding piece may have a first protruding piece attached to the rise of the foundation and a second protruding piece attached to the top surface of the concrete floor.

The second protruding piece, which is made of anti-termite sheet and extends from the other main surface of the main body, is attached to the top surface of the concrete floor, preventing termites from entering the interior of the foundation structure through the gap between the insulation material and the edge surface of the concrete floor.

(3) The height position of the top surface of the anti-termite sheet-covered insulation is equal to or higher than the height position of the top surface of the concrete floor and lower than the height position of the top surface of the riser, and the foundation structure according to the present invention may further include an untreated insulation material placed on the top surface of the anti-termite sheet-covered insulation material.

Of the insulation material of the size required for insulation, by using insulation material with anti-termite sheeting on the lower part where termite protection is required, and using untreated insulation material on the upper part where termite protection is not required, it is possible to reduce the amount of anti-termite sheeting used.

(4) The first 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 first protruding piece is sandwiched between the rise and the base or the column base metal fitting, so the protruding piece is prevented from peeling off from the rise due to aging.

(5) The foundation structure according to the present invention includes a plurality of the anti-termite sheet-covered insulation materials arranged adjacent to each other in the horizontal direction, and the anti-termite sheets may be overlapped at the connection portion between two adjacent anti-termite sheet-covered insulation materials.

The anti-termite sheets are overlapped to connect the two pieces of insulation covered with anti-termite sheets, preventing termites from invading the interior of the foundation structure through the connection between the two pieces of insulation covered with anti-termite sheets.

(6) The construction method for a foundation structure according to the present invention is a construction method for a foundation structure using an anti-termite sheet-covered insulation material. The anti-termite sheet-covered insulation material has a rectangular plate-shaped main body and a protruding piece extending from the main body. The main body is formed of a rectangular plate-shaped insulation material and an anti-termite sheet covering the insulation material. The protruding piece is formed of the anti-termite sheet. The construction method for a foundation structure according to the present invention includes a first step of pouring a foundation having a rise, a second step of abutting one surface of the main body of the anti-termite sheet-covered insulation material against the inner wall surface of the rise to attach the anti-termite sheet-covered insulation material to the foundation, a third step of pouring a concrete floor on the inner wall surface side of the rise, and a fourth step of attaching the protruding piece to the inner wall surface of the rise.

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

(7) The method for constructing a foundation structure according to the present invention may further include a fifth step of attaching the protruding piece to the upper surface of the concrete floor after the third step.

(8) The fourth step may include applying adhesive to the protruding piece so that the adhesive extends horizontally.

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 a vertical cross-sectional view of the foundation structure 10. As shown in FIG. FIG. 5 is an explanatory diagram for explaining the construction of the foundation structure 10. 6A is a vertical cross-sectional view of the foundation structure 10 in the first modified example, and FIG. 6B is a vertical cross-sectional view of the foundation structure 10 in the second modified example.

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, anti-termite sheet-covered insulation material 15 and untreated insulation material 38 attached to the slab 11, and a concrete floor 19.

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. 4) 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(C), the anti-termite sheet insulation material 15 comprises a rectangular plate-shaped main body 41, a first protruding piece 42 and a second protruding piece 43 protruding from the main body 41, a first extending portion 44, a second extending portion 45, and a third extending portion 46.

As shown in FIG. 3(B), the main body 41 is formed of a rectangular plate-shaped insulating material 20, and a first anti-termite sheet 31 and a second anti-termite sheet 32 attached to the insulating material 20. The first protruding piece 42 is formed by the first anti-termite sheet 31. The second protruding piece 43 is formed by the second anti-termite sheet 32. This will be explained in detail below.

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 and bottom surface 24 of the insulation material 20 using an adhesive such as hot melt. The end of the first anti-termite sheet 31 attached to the insulation material 20 protrudes from the edge where the top surface 23 and second main surface 22 of the insulation material 20 intersect, forming a first protruding piece 42. The protruding length of the first protruding piece 42 is, for example, within a range of several centimeters to a dozen centimeters.

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 first anti-termite sheet 31, or the long anti-termite sheet may be attached to the insulating material 20 and then cut to form the first anti-termite sheet 31. The first anti-termite sheet 31 does not have to be attached to the entire bottom surface 24 of the 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.

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. 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, and the bottom surface 24 of the insulation material 20 are covered by the anti-termite sheets 31, 32. The first anti-termite sheet 31 and the second anti-termite sheet 32 that cover the insulation material 20 prevent the insulation material 20 from being eaten by termites.

The 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, forming a second protruding piece 43. The protruding length of the second protruding piece 43 is, for example, within a range of several centimeters to a dozen centimeters. 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.

The first extension portion 44 extends laterally from the first protruding piece 42. That is, the first extension portion 44 is formed by the first anti-termite sheet 31. The second extension portion 45 extends laterally from the second protruding piece 43. That is, the second extension portion 45 is formed by the second anti-termite sheet 32. The third extension portion 46 extends laterally from the first anti-termite sheet 31 or the second anti-termite sheet 32 on the top surface 23 of the insulation material 20. That is, the first extension portion 44 is formed by the first anti-termite sheet 31 or the second anti-termite sheet 32. The extension length of the first extension portion 44, the second extension portion 45, and the third extension portion 46 is, for example, within a range of several centimeters to a dozen centimeters. When multiple anti-termite sheet-attached insulation materials 15 are arranged adjacent to each other (FIG. 1), the first extension portion 44, the second extension portion 45, and the third extension portion 46 are overlapped with the first protruding piece 42, the second protruding piece 43, and the top surface of the main body 41 of the other anti-termite sheet-attached insulation materials 15. Details will be described later.

As shown in FIG. 4, the anti-termite sheet insulation material 15 is arranged with one of a pair of main surfaces of the main body 41 abutting against the inner wall surface 17 of the rise 13 of the slab 11. The height position of the top surface of the main body 41 is lower than the height position of the top surface of the rise 13 of the slab 11 so that the untreated insulation material 38 can be placed on the main body 41 and installed on the slab 11. In addition, the height position of the top surface of the main body 41 is higher than the height position of the top surface of the concrete floor 19 so that anti-termite measures can be taken between the concrete floor 19 and the main body 41. In the illustrated example, the height position of the top surface of the main body 41 is approximately the same as the height position of the top surface of the concrete floor 19.

The anti-termite sheet insulation material 15 is arranged so that the first protruding piece 42 and the second protruding piece 43 are on top and the main surface of the body 41 is in contact with the inner wall surface 17 of the rise 13 of the slab 11. The first protruding piece 42 and the first extension portion 44 are attached to the inner wall surface 17 of the rise 13 of the slab 11 and the first protruding piece 42 of the adjacent anti-termite sheet insulation material 15 using a silicone adhesive 18. Specifically, the first protruding piece 42 is attached to the inner wall surface 17 of the rise 13 of the slab 11, and the first extension portion 44 is attached to the first protruding piece 42 of the adjacent anti-termite sheet insulation material 15. The silicone adhesive 18 is a silicone adhesive in the broad sense, including modified silicone adhesives.

The silicone adhesive 18 is applied from one end to the other end of the first protruding piece 42 and the first extending portion 44 in the horizontal direction. The silicone adhesive 18 is also applied to the first protruding piece 42 and the first extending portion 44 in three vertical rows. The silicone adhesive 18 forms three rows of beads extending horizontally. Each row is vertically arranged at intervals of, for example, about 25 mm. These three rows of beads prevent termites from entering the interior of the foundation structure 10 from between the anti-termite sheet insulation material 15 and the rise 13 of the slab 11.

The second protruding piece 43 and the second extension portion 45 are attached to the upper surface of the concrete floor 19 and to the second protruding piece 43 of the adjacent anti-termite sheet-covered insulation material 15 using a silicone adhesive 18. Specifically, the second protruding piece 43 is attached to the concrete floor 19, and the second extension portion 45 is attached to the second protruding piece 43 of the adjacent anti-termite sheet-covered insulation material 15.

The silicone adhesive 18 is applied from one end to the other end of the second protruding piece 43 and the second extending portion 45 in the horizontal direction. The silicone adhesive 18 is also applied to the second protruding piece 43 and the second extending portion 45 in three horizontal rows. The silicone adhesive 18 forms three rows of beads extending horizontally. Each row is arranged vertically, for example, at intervals of about 25 mm. These three rows of beads prevent termites from entering the interior of the foundation structure 10 from between the anti-termite sheet insulation material 15 and the concrete floor 19.

The third extension 46 is superimposed on the top surface of the main body 41 of another adjacent anti-termite sheet-attached insulation material 15. The third extension 46 may be attached to the top surface of the main body 41 of another adjacent anti-termite sheet-attached insulation material 15 using silicone adhesive 18.

The concrete floor 19 is poured on the inner wall surface 17 side of the rise 13 of the slab 11. The end face of the concrete floor 19 abuts against the main surface of the body 41 of the anti-termite sheet-covered insulation material 15. In other words, the concrete floor 19, together with the rise 13 of the slab 11, sandwiches the anti-termite sheet-covered insulation material 15 horizontally. The second protruding piece 43 of the anti-termite sheet-covered insulation material 15 is attached to the upper surface of the end of the concrete floor 19.

Untreated insulation material 38 is insulation material without an anti-termite sheet attached, and is manufactured, for example, in the same manner as insulation material 20. Untreated insulation material 38 is a rectangular plate. The size of the bottom surface of untreated insulation material 38 is approximately the same as the size of the top surface of main body 41 of insulation material 15 with anti-termite sheet attached. In other words, untreated insulation material 38 can be placed overlapping the top surface of main body 41 of insulation material 15 with anti-termite sheet attached.

The untreated insulation material 38 is placed on the upper surface of the main body 41 of the insulation material 15 with anti-termite sheet, and is positioned so that its main surface abuts against the inner wall surface 17 of the rise 13 of the slab 11, and is fixed to the rise 13 using a fastener such as tape or adhesive.

The construction of the foundation structure 10 will be described below. As shown in FIG. 5(A), after removing the formwork from the foundation structure 10, the worker levels the anti-termite sheet-covered insulation material 15 on the inner wall surface 17 of the riser 13. Next, the worker aligns the upper end of the anti-termite sheet-covered insulation material 15 to the level and fixes the anti-termite sheet-covered insulation material 15 (FIG. 5(B)). The process of attaching the anti-termite sheet-covered insulation material 15 to the slab 11 is an example of the second process.

Next, the worker pours the concrete floor 19 (FIG. 5(C)). The end face of the poured concrete floor 19 abuts against the upper part of the main surface of the main body 41 of the insulation material 15 with anti-termite sheet. The process of pouring the concrete floor 19 is an example of the third process.

Next, the worker applies silicone adhesive 18 to the first protruding piece 42 and the first extending portion 44 of the anti-termite sheet insulation material 15 in three rows, attaches the first protruding piece 42 to the inner wall surface 17 of the rise 13 of the strip footing 11, and attaches the first extending portion 44 to the first protruding piece 42 of the adjacent anti-termite sheet insulation material 15. Next, the worker applies silicone adhesive 18 to the second protruding piece 43 and the second extending portion 45 of the anti-termite sheet insulation material 15 in three rows, attaches the second protruding piece 43 to the upper surface of the concrete floor 19, and attaches the second extending portion 45 to the second protruding piece 43 of the adjacent anti-termite sheet insulation material 15. The process in which the worker attaches the first protruding piece 42 to the rise 13 of the strip footing 11 is an example of the fourth process. The process in which the worker attaches the second protruding piece 43 to the upper surface of the concrete floor 19 is an example of the fifth process.

Although not shown in Figures 1 and 6, a decorative cover for covering the anti-termite sheet-attached insulation material 15 may be attached to the slab 11. Furthermore, without using either the first protruding piece 42 or the second protruding piece 43, measures to prevent termite intrusion may be taken using normal anti-termite means.

[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 first protruding piece 42 made of the first anti-termite sheet 31 is attached to the inner wall surface 17 of the rise 13 of the slab 11, so that termites are prevented from invading the interior of the foundation structure 10 between the anti-termite sheet-covered insulation material 15 and the rise 13 of the slab 11.

In addition, the second protruding piece 43 made of the second anti-termite sheet 32 is attached to the upper surface of the concrete floor 19, so that termites are prevented from invading the interior of the foundation structure 10 through the gap between the anti-termite sheet insulation material 15 and the concrete floor 19.

In addition, in this embodiment, untreated insulation material 38 is placed on top of the anti-termite sheet-attached insulation material 15 to which the first anti-termite sheet 31 and the second anti-termite sheet 32 are attached. In other words, of the insulation material of the size required for insulation, the anti-termite sheet-attached insulation material 15 is used in the lower part where termite prevention is required, and untreated insulation material 38 is used in the upper part where termite prevention is not required. Therefore, the amount of anti-termite sheet used can be reduced.

In addition, in this embodiment, the first extension portion 44 is attached to the first protruding piece 42 of another adjacent anti-termite sheet-covered insulation material 15. Therefore, it is possible to prevent termites from invading the inside of the foundation structure 10 between two adjacent anti-termite sheet-covered insulation materials 15 and between the anti-termite sheet-covered insulation material 15 and the rise 13 of the slab 11.

In addition, in this embodiment, the second extension portion 45 is attached to the second protruding piece 43 of another adjacent anti-termite sheet-covered insulation material 15. Therefore, it is possible to prevent termites from invading the interior of the foundation structure 10 between two adjacent anti-termite sheet-covered insulation materials 15 and between the anti-termite sheet-covered insulation material 15 and the concrete floor 19.

[Variation 1]
In the above embodiment, an example was described in which the amount of anti-termite sheet used was reduced by using the untreated heat insulating material 38. However, as shown in Fig. 6 (A), the untreated heat insulating material 38 may not be used, and only the anti-termite sheet-attached heat insulating material 15 may be used. To explain in detail, the anti-termite sheet-attached heat insulating material 15 includes a rectangular plate-shaped main body 41 and a first protruding piece 61 and a second protruding piece 62 protruding from the main body 41. The anti-termite sheet-attached heat insulating material 15 is disposed such that one of a pair of main surfaces of the main body 41 is in contact with the rise 13 of the slab 11.

The first protruding piece 61 protrudes from the edge where the top surface of the main body 41 intersects with the one of the main surfaces. The second protruding piece 62 protrudes from the edge where the bottom surface of the main body 41 intersects with the other main surface. The first protruding piece 61 is formed by the end of the first anti-termite sheet 31 attached to the first main surface 21 and bottom surface 24 of the insulation material 20. The second protruding piece 62 is formed by attaching the end of the first anti-termite sheet 31 and the end of the second anti-termite sheet 32.

The first protruding piece 61 is attached to the inner wall surface 17 of the rise 13 of the slab 11 using a silicone adhesive 18. The second protruding piece 62 is pulled out upward and attached to the top surface of the concrete floor 19 using a silicone adhesive 18. The other configurations are the same as those described in the embodiment.

In this modified example, termites are also prevented from invading the interior of the foundation structure 10. In addition, once the anti-termite sheet-attached insulation material 15 is attached to the inner surface of the rise 13 of the slab 11, the first protruding piece 61 or an anti-termite sheet extending from the anti-termite sheet-attached insulation material 15 can be attached to the inner surface of cross members such as the foundation or lower frame that are installed on the rise 13, thereby achieving the airtightness required for foundation insulation construction.

[Variation 2]
In the above-mentioned modified example 1, an example has been described in which the first protruding piece 61 is attached to the inner wall surface 17 of the rising portion 13 of the slab footing 11. However, as shown in Fig. 6(B) , the first protruding piece 61 may be attached to the upper surface of the rising portion 13 of the slab footing 11 and sandwiched between the rising portion 13 and the base 16. Alternatively, when a column base metal fitting is used instead of the base 16, the first protruding piece 61 is sandwiched between the rising portion 13 and the column base metal fitting. The other configurations are the same as those of the embodiment and modified example 1.

In this modified example, the first protruding piece 61 of the anti-termite sheet insulation material 15 is sandwiched between the rise 13 of the slab 11 and the base 16 or the column base metal fittings, so that the first protruding piece 61 is prevented from peeling off from the rise 13 due to aging.

[Other variations]
In the above embodiment, an example in which the pair of side surfaces 25, 26 of the heat insulating material 20 are not covered with the anti-termite sheet 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, 26 of the heat insulating material 20. For example, after attaching the first anti-termite sheet 31 to the side surfaces 25, 26, a 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 heat insulating material 20, termites are prevented from invading the inside of the heat insulating material 20 and eating the heat insulating material 20.

In the above embodiment, an example was described in which the third extension portion 46 was provided on the anti-termite sheet-attached insulation material 15. However, the third extension portion 46 does not necessarily have to be provided.

Reference Signs List 10: Foundation structure 11: Strip footing 13: Rise 15: Anti-termite sheet-attached insulation material 17: Inner wall surface 18: Silicone adhesive 19: Concrete floor 20: Insulation material 21: First main surface 22: Second main surface 25, 26: Side 41: Main body 42, 61: First protruding piece 43, 62: Second protruding piece

Claims (4)

A foundation having a rise;
A concrete floor is poured on the inner wall side of the above-mentioned rise,
The insulation material includes a plurality of anti-termite sheet-attached insulation materials arranged adjacent to each other between the rising portion and the concrete floor, the anti-termite sheet-attached insulation materials having a rectangular plate-shaped main body made of insulation material to which an anti-termite sheet is attached, one main surface of the main body abutting on the inner wall surface of the rising portion and the other main surface abutting on the end surface of the concrete floor,
The above-mentioned anti-termite sheet insulation material is
A first protruding piece extending from the anti-termite sheet attached to the heat insulating material, protruding from the main body and attached to the inner wall surface of the rising portion;
A second protruding piece extends from the anti-termite sheet attached to the heat insulating material, protrudes from the main body, and is attached to the upper surface of the concrete floor;
A first extension portion extending from the first protruding piece and overlapping and affixing to the first protruding piece of another adjacent anti-termite sheet-attached insulation material;
A second extension portion extending from the second protruding piece and overlapping and attached to the second protruding piece of another adjacent anti-termite sheet-attached insulation material;
A third extension portion extends from the first extension portion or the second extension portion and is attached to the top surface of the main body of another adjacent anti-termite sheet-attached insulation material.
A foundation structure in which the first protruding piece, the second protruding piece, the first extension portion, the second extension portion, and the third extension portion are formed from an anti-termite sheet . The height position of the top surface of the anti-termite sheet-attached insulation material is equal to or higher than the height position of the top surface of the concrete floor and is lower than the height position of the top surface of the rising part,
The foundation structure according to claim 1 , further comprising an untreated insulating material placed on an upper surface of the anti-termite sheet-attached insulating material. The foundation structure according to claim 1 or 2, in which the first 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. A construction method for a foundation structure using an insulating material with an anti-termite sheet, the insulating material having a rectangular plate-shaped main body made of an insulating material with an anti-termite sheet attached thereto, a first protruding piece and a second protruding piece extending from the anti-termite sheet of the main body and protruding from the main body, a first extending portion extending from the first protruding piece, a second extending portion extending from the second protruding piece, and a third extending portion extending from the first extending portion or the second extending portion,
The first protruding piece, the second protruding piece, the first extending portion, the second extending portion, and the third extending portion are formed of an anti-termite sheet,
A first step of pouring a foundation having a rise;
A second step of attaching a plurality of the anti-termite sheet-attached insulation materials to the foundation by abutting one main surface of the main body of the anti-termite sheet-attached insulation material against the inner wall surface of the rising portion, so that the anti-termite sheet-attached insulation materials are adjacent to each other;
A third step of pouring a concrete floor on the inner wall surface side of the rising portion, the end surface of the concrete floor being in contact with the other main surface of the main body;
A fourth step of attaching the first protruding piece to the inner wall surface of the rising portion and attaching the first extending portion to the first protruding piece of another adjacent anti-termite sheet-attached insulation material;
After the third step, the second protruding piece is attached to the upper surface of the concrete floor, and the second extension part is attached to the second protruding piece of another adjacent anti-termite sheet-attached insulation material.
A construction method for a foundation structure, comprising the step of attaching the third extension portion to the top surface of the main body of another adjacent anti-termite sheet-covered insulation material after the second step.

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