Foundation structure and maintenance method for foundation structure

Abstract

To make maintenance of a foundation structure easy and secure.SOLUTION: A foundation structure comprises: a footing foundation 11 having a rising 13 extending along an extension direction; a tabular lower heat insulation material 20 that has a principal surface 21 abutting on a lower part of a side surface 15 of the rising 13 and a top surface 23 along a horizontal direction; a tabular upper heat insulation material 30 that has a principal surface 31 abutting on an upper part of the side surface 15 of the rising 13 and a bottom surface 34 along the horizontal direction and is located so as to have a gap (arrangement space 62) with the lower heat insulation material 20; a termite-proof member 60 having a plurality of porous granular bodies 61 located in the arrangement space 62 and termite-proof chemical held by the porous granular bodies 61; and a sheet member 19 that closes an opening of the arrangement space 62. At the time of construction, the sheet member 19 prevents the porous granular bodies 61 from falling from the arrangement space 62. At the time of maintenance, the termite-proof chemical injected into the arrangement space 62 spreads in the extension direction through gaps among the plurality of porous granular bodies 61.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a technique for providing insulation and anti-termite protection in a foundation structure. [Background technology]

[0002] Patent Document 1 discloses a foundation structure including a foundation having a rise, a lower insulation material and an upper insulation material attached to the side of the rise, and an anti-termite member (termite repellent member). The anti-termite member is located between the lower insulation material and the upper insulation material. The anti-termite member is formed by impregnating a synthetic resin foam with a termite repellent. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2007-177441 A Summary of the Invention [Problem to be solved by the invention]

[0004] After the foundation structure is constructed, the effectiveness of the termite repellent held by the synthetic resin foam decreases over time. For example, after a certain period of time, such as 10 years, has passed since the foundation structure was constructed, maintenance will be required to reapply the termite repellent to the synthetic resin foam.

[0005] When an exterior material is located outside the synthetic resin foam, the termite repellent cannot be directly attached to the synthetic resin foam. In addition, the termite repellent must also be poured between the synthetic resin foam and the side of the foundation. Therefore, in maintenance, for example, a chemical injection device having a nozzle is used to insert the nozzle from the outside of the exterior material, and the termite repellent injected from the nozzle is attached to the synthetic resin foam. Since the range in which the termite repellent flowing out from the nozzle spreads is limited, in order to evenly attach the termite repellent to the entire surface of the synthetic resin foam, it is necessary to insert the nozzle into many positions to inject the termite repellent, which causes a problem of laborious maintenance.

[0006] In addition, because synthetic resin foam is a hydrophobic material to begin with, there is technology in place to impart termite-proofing properties by adhering termite repellents to materials before they are molded in factories, etc.; however, even if the termite repellent, which is mostly composed of water, is applied on site, it cannot be adhered to the surface, posing a technical problem in that it does not meet the sufficient conditions for use as a chemical carrier layer when renewing.

[0007] The present invention has been made in consideration of the above-mentioned circumstances, and has an object to provide a technique for making maintenance of a foundation structure easy and reliable. [Means for solving the problem]

[0008] (1) The foundation structure of the present invention comprises a foundation having a rise extending in an extension direction along a horizontal direction, a plate-shaped lower insulation material with a first main surface abutting against a side of the rise and an upper surface along the horizontal direction, a plate-shaped upper insulation material with a first main surface abutting against the side of the rise and a lower surface along the horizontal direction, the upper insulation material being positioned with a gap from the lower insulation material positioned below, and an anti-termite member having a plurality of porous granules positioned in the gap and an anti-termite agent held in the porous granules.

[0009] During maintenance of a foundation structure, the anti-termite agent injected into the gap between the lower insulation material and the upper insulation material spreads in the extension direction through the gaps between the multiple porous granular bodies.

[0010] (2) The foundation structure of the present invention may further include a plate-shaped lower exterior material covering the second main surface of the lower insulation material, a plate-shaped upper exterior material covering the second main surface of the upper insulation material, and a joint material between the lower exterior material and the upper exterior material facing the opening of the gap.

[0011] According to the above configuration, the gap in which the anti-termite member is disposed is located behind the joint material between the lower exterior material and the upper exterior material. Therefore, the worker can inject the anti-termite agent into the space (gap) in which the anti-termite member is disposed without checking the position of the anti-termite member. As a result, the maintenance of the foundation structure becomes even easier.

[0012] (3) The foundation structure according to the present invention may further include a sheet member that closes an opening of the gap in at least a second main surface opposite to the first main surface.

[0013] When constructing the foundation structure, the plurality of porous granular bodies are held on the upper surface of the bottom insulation by the sheet member.

[0014] (4) The lower insulation may have a plate-shaped insulation body and a sheet body covering the insulation body, and the sheet member may extend from the sheet body.

[0015] The sheet body covering the heat insulating material body prevents the heat insulating material body from being damaged by termites.

[0016] (5) A maintenance method for a foundation structure according to the present invention is a maintenance method for a foundation structure comprising: a foundation having a rise extending in an extension direction along the horizontal direction; a plate-shaped lower insulation material having a first main surface abutting against a side surface of the rise and an upper surface along the horizontal direction; a plate-shaped upper insulation material having a first main surface abutting against the side surface of the rise and a lower surface along the horizontal direction and positioned with a gap from the lower insulation material positioned below; an anti-termite member having a plurality of porous granules positioned in the gap and an anti-termite agent held in the porous granules; a plate-shaped lower exterior material covering a second main surface of the lower insulation material; a plate-shaped upper exterior material covering the second main surface of the upper insulation material; and a joint material between the lower exterior material and the upper exterior material and facing the opening of the gap, the method comprising: a first step of providing a through hole in the joint material; a second step of inserting a nozzle into the through hole; and a third step of injecting the anti-termite agent from the nozzle into the gap.

[0017] The present invention can also be understood as a maintenance method for a foundation structure.

[0018] (6) The base structure may further include a sheet member that closes an opening of the gap at least in a second main surface opposite to the first main surface, and the first step may include a step of providing a through hole in the sheet member.

[0019] An anti-termite agent is injected into the space in which the porous granular material is disposed through the through holes provided in the joint material and the sheet member. Effect of the Invention

[0020] According to the present invention, maintenance of a foundation structure having anti-termite properties can be easily and reliably performed. [Brief description of the drawings]

[0021] [Figure 1] FIG. 1(A) is a perspective view of a portion of a foundation structure 10, and FIG. 1(B) is a perspective view of a portion of the foundation structure 10 with exterior materials 41 and 42 removed. [Diagram 2]FIG. 2 is an explanatory diagram illustrating the process of pouring the continuous footing 11. [Diagram 3] FIG. 3 is a vertical cross-sectional view of the foundation structure 10. As shown in FIG. [Figure 4] FIG. 4 is an explanatory diagram for explaining a construction method of the foundation structure 10. As shown in FIG. [Diagram 5] FIG. 5 is an explanatory diagram for explaining a maintenance method for the foundation structure 10. As shown in FIG. [Figure 6] FIG. 6 is an explanatory diagram illustrating a lower insulation material 25 in a modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] Hereinafter, an embodiment of the present invention will be described. Note that the embodiment described below is merely an example of the present invention, and it goes without saying that the embodiment of the present invention can be appropriately modified without departing from the gist of the present invention.

[0023] 1 is a perspective view of a portion of a foundation structure 10 that supports the framework (not shown) of a building. The foundation structure 10 includes a continuous footing 11, a lower insulation material 20, an upper insulation material 30, a sheet member 19, a lower exterior material 41, an upper exterior material 42, and a joint material 64. Note that a slab footing may be used instead of the continuous footing 11.

[0024] The continuous footing 11 includes a footing 12, a rising portion 13, and a plurality of anchor bolts 14. The footing 12 is buried in the ground as shown in FIG. 3. The rising portion 13 protrudes upward from the footing 12. That is, the rising portion 13 protrudes upward from the ground. An upper surface 16 of the rising portion 13 extends along an extension direction 9 along the horizontal direction as shown in FIG. 1. In the following description, the direction along the horizontal direction and perpendicular to the extension direction 9 is referred to as a width direction 8.

[0025] 2, for example, a worker lays crushed stone (not shown) in a trench 51 formed in the ground, pours mortar concrete 52, and then installs a formwork 53 along the trench 51. The worker installs reinforcing bars (not shown) held by the formwork 53, installs anchor bolts 14 using support plates 54, and then pours ready mixed concrete into the formwork 53 to install the slab 11.

[0026] 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, in the cast strip footing 11, only the bolt portion of the anchor bolt 14 is visible.

[0027] The anchor bolts 14 and nuts (not shown) secure, for example, a column base metal fitting. The column base metal fitting secures a column. The column secures a structural member such as a beam. In other words, the foundation structure 10 supports the building framework consisting of columns, beams, etc. Note that the number and method of arranging the anchor bolts 14 vary depending on the building structure, and therefore the embodiment is not limited by the contents shown in the drawings.

[0028] 1 and 3, the bottom insulation material 20 is a rectangular plate having two main surfaces 21, 22 and four end surfaces. The length of one side of the bottom insulation material 20 (the length in the vertical direction in the figure) is approximately half the length of the rise 13 in the vertical direction.

[0029] For example, a worker applies adhesive to the main surface 21 of the bottom insulation material 20 or the lower part of the side surface 15 of the rise 13 of the strip footing 11, aligns the lower end of the side surface 15 with one end surface of the bottom insulation material 20 in the vertical direction, and attaches the bottom insulation material 20 to the strip footing 11 as shown in FIG. 4(A). That is, the main surface 21 of the bottom insulation material 20 abuts against the lower part of the side surface 15 of the rise 13 of the strip footing 11. The main surface 21 is an example of the first main surface of the bottom insulation material. For example, a modified silicone adhesive is used as the adhesive. The rise 13 to which the bottom insulation material 20 is attached forms the outer periphery of the foundation structure 10, and the side surface 15 is the so-called outer surface facing the outside of the building.

[0030] Of the four end faces of the bottom insulation 20 attached to the side surface 15 of the rise 13, two end faces are aligned horizontally, and the other two end faces are aligned vertically. Of the two end faces aligned horizontally, the upper end face is the top face 23, and the lower end face is the bottom face 24. In other words, the top face 23 of the bottom insulation 20 is a rectangular flat surface extending along the width direction 8 and extension direction 9, and also along the extension direction 9. The top face 23 is located near the middle position of the rise 13 in the vertical direction. In the following description, the two end faces of the bottom insulation 20 aligned vertically will be referred to as side end faces.

[0031] Multiple bottom insulation materials 20 are attached to the rising portion 13. The side end face of one bottom insulation material 20 abuts the side end face of another bottom insulation material 20. That is, the multiple bottom insulation materials 20 are lined up adjacent to one another in the extension direction 9. The upper surfaces 23 of the multiple bottom insulation materials 20 are lined up with almost no steps. That is, the multiple upper surfaces 23 are almost flush.

[0032] 4(A), a rectangular, elongated sheet member 19 is attached to the lower insulation 20 using a non-flammable adhesive such as hot melt. For example, an operator applies hot melt to the lower end of the sheet member 19 or the upper end of the main surface 22 of the lower insulation 20, and heats the hot melt using a heat gun to attach the sheet member 19 to the main surface 22 of the lower insulation 20. In other words, the sheet member 19 protrudes upward from the upper end of the main surface 22 of the lower insulation 20.

[0033] The length of the sheet member 19 in the extension direction 9 may be the same as the length of the bottom insulation 20 in the extension direction 9, or may be an integer multiple of the length of the bottom insulation 20. In other words, the sheet member 19 may be attached to one bottom insulation 20, or may be attached to multiple bottom insulation materials 20. In the example shown in FIG. 4(B), the sheet member 19 is attached to multiple bottom insulation materials 20.

[0034] The sheet member 19 is preferably of a hardness that termites cannot gnaw at and that allows an operator to easily make through-holes 66 (FIG. 5(B)) during maintenance, which will be described later. For example, the sheet member 19 is a single sheet or a laminated sheet made of multiple layers, and has a thickness in the range of about 10 μm to 800 μm. Preferably, the sheet member 19 has a thickness in the range of about 10 μm to 400 μm. More preferably, the sheet member 19 has a thickness in the range of about 40 μm to 80 μm. For example, the sheet member 19 is formed by laminating an ethylene-vinyl acetate copolymer (EVA) resin having a thickness of about 25 μm as an adhesive layer on a polyethylene terephthalate resin sheet having a thickness of about 50 μm. Note that sheet members 19 of thicknesses and materials other than those described above may be used.

[0035] As shown in Fig. 3, the sheet member 19 attached to the bottom insulation 20 faces the side surface 15 of the rising portion 13 in the width direction 8. The sheet member 19 also extends along the extension direction 9. The sheet member 19 extending along the extension direction 9, together with the upper surface 23 of the bottom insulation 20 and the side surface 15 of the rising portion 13, defines an arrangement space 62 in which a plurality of porous granular bodies 61 (Fig. 4(C)) are arranged.

[0036] As shown in FIG. 4(C), the worker places a plurality of porous granular bodies 61 in the arrangement space 62. The porous granular bodies 61 have a plurality of holes and can hold a liquid anti-termite agent. For example, the worker impregnates the porous granular bodies 61 with the anti-termite agent and then places the porous granular bodies 61 in the arrangement space 62, or places the porous granular bodies 61 in the arrangement space 62 and then pours the anti-termite agent into the arrangement space 62. The porous granular bodies 61 and the anti-termite agent held in the porous granular bodies 61 form the anti-termite member 60 (FIG. 3). As shown in FIG. 3, the porous granular bodies 61 are not laid up to the upper end of the sheet member 19, but are laid down to a position below the upper end. That is, the upper end of the sheet member 19 is located above the anti-termite member 60. The upper end of the sheet member 19 is used to temporarily hold the upper insulation material 30 described later.

[0037] The porous granular bodies 61 are spherical. Therefore, as shown in the enlarged view of FIG. 3, gaps are formed between the multiple porous granular bodies 61 arranged in the arrangement space 62. In the maintenance described below, the liquid anti-termite agent spreads in the extension direction 9 through the gaps. In order to facilitate the spread of the anti-termite agent in the extension direction 9 and to hold an appropriate amount of the anti-termite agent, the diameter of the porous granular bodies 61 is preferably 5 mm or less. For example, so-called pumice or a superabsorbent polymer is used as the porous granular bodies 61. The superabsorbent polymer is produced, for example, by hydrolyzing a craft copolymer of starch and acrylonitrile.

[0038] 1 and 3, the upper insulation material 30 is a rectangular plate having two main surfaces 31, 32 and four end surfaces. The length of one side of the upper insulation material 30 (the length in the vertical direction in the drawings) is approximately half the length of the rise 13 in the vertical direction.

[0039] For example, a worker applies adhesive to the main surface 31 of the top insulation material 30 or the upper part of the side surface 15 of the rise 13 of the strip footing 11, and then places the top insulation material 30 on the anti-termite member 60 so that the main surface 31 does not abut the side surface 15 of the rise 13 and the main surface 32 abuts the sheet member 19. Next, the worker lays the top insulation material 30 down toward the rise 13 so that the main surface 31 of the top insulation material 30 abuts the side surface 15 of the rise 13, and attaches the top insulation material 30 to the strip footing 11 as shown in FIG. 4(D). The main surface 31 is an example of the first main surface of the top insulation material. For example, a modified silicone adhesive is used as the adhesive.

[0040] Of the four end faces of the upper insulation 30 attached to the side surface 15 of the rising portion 13, two end faces are aligned horizontally, and the other two end faces are aligned vertically. Of the two end faces aligned horizontally, the upper end face is the upper face 33, and the lower end face is the lower face 34. That is, the lower face 34 of the lower insulation 20 is a rectangular plane extending along the width direction 8 and the extension direction 9, and faces the upper face 23 of the lower insulation 20 in the vertical direction. That is, the upper insulation 30 is located above the lower insulation 20 with a gap (arrangement space 62) between it and the lower insulation 20. The above-mentioned sheet member 19 closes the opening of the gap between the lower insulation 20 and the upper insulation 30, and prevents the anti-termite agent from leaking out from the opening.

[0041] A plurality of upper insulation materials 30 are attached to the rising portion 13. The side end face of one upper insulation material 30 abuts the side end face of another upper insulation material 30. That is, the multiple upper insulation materials 30 are lined up adjacent to one another in the extension direction 9. The lower surfaces 34 of the multiple upper insulation materials 30 are lined up with almost no steps. That is, the multiple lower surfaces 34 are almost flush.

[0042] The lower insulation material 20 and the upper insulation material 30 are formed by foaming one or more of the following resins, for example. 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). Usable resins 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 heat insulating performance and suitable mechanical strength when foamed. In addition, the lower insulation material 20 and the upper insulation material 30 can be manufactured by foam molding the above resins using a known method such as extrusion foam molding or in-mold foam molding using a mold, but extrusion foam molding is preferred from the viewpoint of heat insulating performance and mechanical strength.

[0043] The thickness of the lower insulation material 20 and the upper insulation material 30 is, for example, the same, and is within a range of several tens of mm to several hundred and several tens of mm. The length of the lower insulation material 20 and the upper insulation material 30 in the extension direction 9 is, for example, the same, and is within a range of several tens of cm to several hundred and several tens of cm. The length of the upper insulation material 30 in the vertical direction is about half the length of the rise 13 in the vertical direction, and is within a range of several tens of cm to several hundred and several tens of cm. The lower insulation material 20 and the upper insulation material 30 are used by cutting, for example, a standard-length original plate having a thickness of 15 mm to 200 mm, a width of 800 mm to 1000 mm, and a length of 900 mm to 3000 mm according to the specifications of the building. Note that, if the upper insulation material 30 is cheaper than the lower insulation material 20, the length of the upper insulation material 30 in the vertical direction may be longer as much as possible.

[0044] The lower exterior material 41 has a rectangular plate shape. The lower exterior material 41 is, for example, an inorganic molding material with a thickness of about several mm. The main surface of the lower exterior material 41 has approximately the same shape and size as the main surface 22 of the lower insulation material 20. As shown in FIG. 4(E), a worker attaches the lower exterior material 41 to the lower insulation material 20 by abutting the main surface of the lower exterior material 41 against the main surface 22 of the lower insulation material 20. In other words, the lower exterior material 41 covers the lower insulation material 20. The main surface 22 of the lower insulation material 20 is an example of a second main surface.

[0045] The upper exterior material 42 has a rectangular plate shape. The upper exterior material 42 is, for example, an inorganic molding material with a thickness of about several mm. The main surface of the upper exterior material 42 has substantially the same shape and size as the main surface 32 of the upper insulation material 30. As shown in FIG. 4(E), a worker attaches the upper exterior material 42 to the upper insulation material 30 by abutting the main surface of the upper exterior material 42 against the main surface 32 of the upper insulation material 30. In other words, the upper exterior material 42 covers the upper insulation material 30. The main surface 32 of the upper insulation material 30 is an example of a second main surface.

[0046] As shown in Fig. 3, the gap between the lower exterior material 41 attached to the lower insulation material 20 and the upper exterior material 42 attached to the upper insulation material 30 is filled with, for example, a modified silicone-based joint material 64. After attaching the lower exterior material 41 and the upper exterior material 42 to the insulation materials 20, 30 (Fig. 4(E)), a worker injects the joint material 64 into the gap between the lower exterior material 41 and the upper exterior material 42, as shown in Fig. 4(F), and installs the joint material 64.

[0047] The lower exterior material 41 may be attached in advance to the lower insulation material 20, and the upper exterior material 42 may be attached in advance to the upper insulation material 30. In that case, the worker attaches the integrated lower exterior material 41 and lower insulation material 20, and the integrated upper exterior material 42 and upper insulation material 30 to the rising portion 13, and then injects the joint material 64 into the gap between the lower exterior material 41 and the upper exterior material 42 to install the joint material 64.

[0048] The joint material 64 is located to the side of the anti-termite member 60 and the sheet member 19, and faces the opening of the gap (arrangement space 62) between the lower insulation material 20 and the upper insulation material 30 in the width direction 8. In other words, the anti-termite member 60 is located behind the joint material 64. Therefore, during maintenance, which will be described later, an anti-termite agent can be injected into the arrangement space 62 through the joint material 64.

[0049] The anti-termite agent in the gaps between the multiple porous granules 61, or the anti-termite agent seeping out from the holes in the porous granules 61, penetrates over time into the gaps between the bottom insulation material 20 and the side surface 15 of the riser 13, and into the gaps between the multiple adjacent bottom insulation materials 20. The anti-termite agent that penetrates into the gaps prevents termites from passing through the gaps and invading the building structure. The sheet member 19 prevents the anti-termite agent from leaking out of the openings of the gaps (arrangement space 62). In other words, the anti-termite agent efficiently penetrates into the gaps between the bottom insulation material 20 and the side surface 15 of the riser 13, and into the gaps between the multiple adjacent bottom insulation materials 20.

[0050] When a service life of about 10 years or so has passed since the building was constructed, the anti-termite agent held in the arrangement space 62 will be depleted. After or before the service life has passed, maintenance is performed to inject the anti-termite agent into the arrangement space 62. That is, the maintenance is performed every service life of about 10 years or so.

[0051] In this maintenance, a worker uses a needle-shaped tool to make through holes 65, 66 (FIG. 5) in the joint material 64 and the sheet member 19. The through hole 65 of the joint material 64 and the through hole 66 of the sheet member 19 are aligned in the width direction 8. The process in which the worker makes the through hole 66 in the joint material 64 and the sheet member 19 is an example of the first process.

[0052] After providing the through holes 65, 66, the worker inserts the nozzle 71 of the agent injection device 70 into the through holes 65, 66 to inject the liquid anti-termite agent into the arrangement space 62. The anti-termite agent injected into the arrangement space 62 spreads in the extension direction 9 through the gaps between the porous granular bodies 61 and penetrates into the holes of the porous granular bodies 61. The anti-termite agent that spreads into the arrangement space 62 also penetrates into the gaps between the side surface 15 of the riser 13 and the lower insulation material 20, and into the gaps between the adjacent lower insulation materials 20, preventing termites from invading the building frame through the gaps. When the anti-termite agent spreads into the arrangement space 62, the sheet member 19 prevents it from flowing out of the opening of the gap (arrangement space 62) between the lower insulation material 20 and the upper insulation material 30. The process in which the worker inserts the nozzle 71 into the through hole 66 of the sheet member 19 is an example of the second process. The step of the worker injecting the anti-termite agent into the arrangement space 62 is an example of the third step.

[0053] [Effects] In this embodiment, the sheet member 19 prevents the porous granular bodies 61 from falling out of the arrangement space 62. This makes it easier to construct the foundation structure 10.

[0054] Furthermore, in this embodiment, during maintenance of the foundation structure 10, the anti-termite agent injected into the gap (arrangement space 62) between the lower insulation material 20 and the upper insulation material 30 spreads in the extension direction 9 through the gaps between the multiple porous granular bodies 61. Therefore, even if a large number of through holes 65, 66 are not provided from one end of the joint material 64 to the other in the extension direction 9, the anti-termite agent can be distributed evenly throughout the arrangement space 62. As a result, maintenance of the foundation structure 10 becomes easy and reliable.

[0055] In addition, in this embodiment, during maintenance of the foundation structure 10, the anti-termite agent injected into the gap (arrangement space 62) between the lower insulation material 20 and the upper insulation material 30 is prevented from flowing out from the opening of the gap by the sheet member 19. That is, the foundation structure 10 can reduce the amount of anti-termite agent used.

[0056] Moreover, in this embodiment, the anti-termite members 60 are located at the back of the joint material 64. Therefore, a worker can provide a through hole 65 in the joint material 64 and inject an anti-termite agent into the arrangement space 62 in which the anti-termite members 60 are arranged, without having to know where the anti-termite members 60 are located in the vertical direction. As a result, the worker is saved from the trouble of figuring out where the anti-termite members 60 are located, making maintenance of the foundation structure 10 even easier.

[0057] [Variations] In this modified example, a foundation structure 10 (FIG. 1) is described that includes a lower insulation material 25 shown in FIG. 6 instead of the lower insulation material 20 and sheet member 19 shown in FIG. 3. Note that the same components as those described in the embodiment are given the same reference numerals and their description is omitted. Also, the components other than those described below are the same as those described in the embodiment.

[0058] The lower insulation 25 has an insulation body 80 shown in Fig. 6(A) and a sheet body 90 (Fig. 6(B)) attached to the insulation body 80. The configuration of the insulation body 80 is the same as that of the lower insulation 20, and the insulation body 80 is a rectangular plate having main surfaces 81, 82, an upper surface 83, a lower surface 84, and two side end surfaces.

[0059] The sheet body 90 is attached to the main surfaces 81, 82, the upper surface 83, and the lower surface 84 of the heat insulating material body 80 using an adhesive such as hot melt. That is, the sheet body 90 covers the main surfaces 81, 82, the upper surface 83, and the lower surface 84 of the heat insulating material body 80. An end 92 of the sheet body 90, which is continuous with the part attached to the main surface 82 of the heat insulating material body 80, protrudes upward from the upper end of the main surface 82 of the heat insulating material body 80. In addition, an end 93 of the sheet body 90, which is continuous with the part attached to the upper surface 83 of the heat insulating material body 80, protrudes upward from the end where the upper surface 83 and the main surface 82 of the heat insulating material body 80 intersect. The end 92 and the end 93 are attached to each other by an adhesive such as hot melt to form a sheet member 19. That is, the sheet body 90 has a sheet body 91 which is a portion attached to the heat insulating material body 80, and a sheet member 19 which protrudes upward from the sheet body 91. The sheet body 90 may be made of one sheet or may be made of multiple sheets.

[0060] The thickness, material, etc. of the sheet body 90 are the same as those of the sheet member 19 described in the embodiment.

[0061] The worker attaches the bottom insulation material 25 to the rising portion 13 by abutting the main surface 21 of the bottom insulation material 25 against the side surface 15 (FIG. 3) of the rising portion 13.

[0062] [Effects of modified examples] In this modification, the sheet body 90 covers the main surfaces 81, 82, the upper surface 83, and the lower surface 84 of the thermal insulation body 80. Therefore, the foundation structure 10 can prevent the thermal insulation body 80 from being eaten away by termites.

[0063] In addition, because the upper surface 83 of the thermal insulation material body 80 is covered with the sheet body 90, the anti-termite agent injected into the arrangement space 62 is prevented from seeping into the upper end of the thermal insulation material body 80. As a result, the foundation structure 10 can reduce the amount of anti-termite agent injected into the arrangement space 62 during maintenance.

[0064] The sheet member 19 of the lower insulation 25 may be attached to the main surface 32 of the upper insulation 30 using an adhesive such as hot melt or modified silicone.

[0065] Moreover, the sheet member 19 of the lower insulation 25 does not have to be formed by the ends 92, 93 of the sheet main body 91. The sheet member 19 may be formed by attaching a sheet to the sheet main body 91, as in the embodiment.

[0066] Furthermore, in addition to the main surfaces 81, 82, upper surface 83, and lower surface 84 of the heat insulating material body 80, the side end surfaces may also be covered by the sheet body 91.

[0067] [Other variations] In the above-described embodiment, an example has been described in which the lower exterior material 41 and the upper exterior material 42 are attached to the lower insulation material 20 and the upper insulation material 30. However, the lower exterior material 41 and the upper exterior material 42 do not have to be attached to the lower insulation material 20 and the upper insulation material 30.

[0068] In the above embodiment, an example has been described in which the lower insulation material 20 and the upper insulation material 30 are attached to the side surface 15, which is the outer surface of the rise 13 that constitutes the outer periphery of the slab 11. However, the lower insulation material 20 and the upper insulation material 30 may be attached to the inner surface of the rise 13. In that case, the lower exterior material 41 and the upper exterior material 42 are not provided. For example, a concrete floor is provided that abuts against the main surface 22 of the lower insulation material 20 at a position below the sheet member 19. That is, the sheet member 19 is exposed to the outside. In maintenance, a worker forms a through hole 66 in the sheet member 19 exposed to the outside, and then inserts a nozzle 71 into the through hole 66 to inject the anti-termite agent into the arrangement space 62. Note that the lower insulation material 25 described in the modified example may be used instead of the lower insulation material 20.

[0069] In the above embodiment, an example has been described in which the sheet member 19 is attached to the bottom insulation material 20 after the bottom insulation material 20 is attached to the rising portion 13. However, the sheet member 19 may be attached to the bottom insulation material 20 at a construction site, a factory, or the like. A worker attaches the bottom insulation material 20 with the sheet member 19 attached to it to the rising portion 13.

[0070] In the above-described embodiment, the upper end of the sheet member 19 may be attached to the main surface 32 of the upper insulation material 30 using an adhesive such as hot melt or modified silicone. By fixing the lower and upper ends of the sheet member 19, deformation of the sheet member 19 is prevented when the through holes 66 are formed in the sheet member 19. [Explanation of symbols]

[0071] 10...Foundation structure 11. Strip foundation (foundation) 13. Start up 15. Side 19. Sheet material 20, 25... Bottom insulation 21... Principal surface (first principal surface) 22... Principal surface (second principal surface) 23...Top surface 30... Bottom insulation 31... Main surface (first main surface) 32... Principal surface (second principal surface) 34...bottom surface 41...Lower exterior material 42...Top exterior material 60... Termite-proof material 61...Porous granules 62... Placement space (gap) 64...Joint material 65, 66...Through holes 71 Nozzle 80....Insulation material body

Claims

1. A foundation having a rise extending along an extension direction along a horizontal direction; a plate-shaped lower insulation material having a first main surface abutting against the side surface of the rising portion and an upper surface extending horizontally; a plate-shaped upper insulation material having a first main surface in contact with the side surface of the rising portion, a lower surface along a horizontal direction, and a gap between the lower insulation material located below the plate-shaped upper insulation material; an anti-termite member having a plurality of porous granules positioned in the gaps and an anti-termite agent held in the porous granules; A plate-shaped lower exterior material covering the second main surface of the lower insulation material; A plate-shaped upper exterior material covering the second main surface of the upper insulation material; A foundation structure comprising: a joint material between the lower exterior material and the upper exterior material, the joint material facing the opening of the gap.

2. The substructure according to claim 1 , further comprising a sheet member that closes an opening of the gap at least in a second main surface opposite to the first main surface.

3. The above-mentioned under insulation material is A plate-shaped insulation body; and a sheet body covering the heat insulating material body, The substructure according to claim 2 , wherein the sheet member extends from the sheet body.

4. A maintenance method for a foundation structure comprising: a foundation having a rise extending in an extension direction along a horizontal direction; a plate-shaped lower insulation material having a first main surface abutting against a side surface of the rise and an upper surface along the horizontal direction; a plate-shaped upper insulation material having a first main surface abutting against the side surface of the rise and a lower surface along the horizontal direction and positioned with a gap from the lower insulation material positioned below; an anti-termite member having a plurality of porous granular bodies positioned in the gap and an anti-termite agent held in the porous granular bodies; a plate-shaped lower exterior material covering a second main surface of the lower insulation material; a plate-shaped upper exterior material covering the second main surface of the upper insulation material; and a joint material between the lower exterior material and the upper exterior material facing an opening of the gap, A first step of providing a through hole in the joint material; A second step of inserting a nozzle through the through hole; A maintenance method for a foundation structure comprising a third step of injecting an anti-termite agent into the gap from the nozzle.

5. the foundation structure further includes a sheet member that closes an opening of the gap at least in a second main surface opposite to the first main surface, The maintenance method for a foundation structure according to claim 4 , wherein the first step includes a step of providing a through hole in the sheet member.

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