Method for constructing foundation structure and method for maintaining foundation structure

Abstract

To provide a foundation structure construction method capable of making construction and maintenance of a foundation structure easy and secure.SOLUTION: A foundation structure comprises: a footing foundation 11 having a rising 13; a throating bracket 75 attached to the rising 13; an upper heat insulation material 20 pasted on the rising 13; a lower heat insulation material 30 pasted on the rising 13 below the upper heat insulation material 20 with a gap (arrangement space 62) with the upper heat insulation material 20; and a termite-proof member 60 having a plurality of porous granular bodies filled in the arrangement space 62. In construction of the foundation structure, positioning of the upper heat insulation material 20 is performed by making its top surface 23 abut on the throating bracket 75. In maintenance of the foundation structure, termite-proof chemical is injected into the arrangement space 62 through an open hole provided on a joint filler 64. The termite-proof chemical injected in the arrangement space 62 spreads through gaps among the plurality of porous granular bodies.SELECTED DRAWING: Figure 5

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 that makes construction and maintenance of foundation structures easy and reliable. [Means for solving the problem]

[0008] (1) A construction method for a foundation structure according to the present invention includes a foundation having a rising extending in an extension direction along a horizontal direction, a mounting member attached to the rising and having a first piece extending in a direction intersecting a side of the rising and a second piece protruding downward from a tip of the first piece, a plate-shaped upper insulation material located below the mounting member, with a first main surface abutting the side of the rising and a lower surface running along the horizontal direction, a plate-shaped lower insulation material located below the upper insulation material with a gap therebetween, with a first main surface abutting the side of the rising and a top surface running along the horizontal direction, and a base material and an upper insulation ... A construction method for a foundation structure comprising a plurality of porous granules positioned in gaps between the upper insulation material and an anti-termite member having an anti-termite agent held in the porous granules, the construction comprising a first step of pouring the foundation, a second step of attaching the mounting member to the riser, a third step of abutting the upper surface of the upper insulation material against the first piece of the mounting member and then abutting the first main surface against the side surface of the riser to attach the upper insulation material to the riser, a fourth step of attaching the lower insulation material to the riser, and a fifth step of arranging a plurality of porous granules in the gaps between the upper insulation material and the lower insulation material.

[0009] Since the worker attaches the upper insulation material to the rising portion using the first piece of the mounting member as a reference, the worker can easily attach the upper insulation material to the rising portion. Also, the multiple porous granular bodies are held by being packed into the gap between the upper insulation material and the lower insulation material. Therefore, the worker can easily attach the upper insulation material to the rising portion. This eliminates the need to hold multiple porous granular bodies, making it easier to construct the foundation structure.

[0010] (2) A construction method for a foundation structure according to the present invention includes a foundation having a rising extending in an extension direction along a horizontal direction, a mounting member attached to the rising and having a first piece extending in a direction intersecting a side of the rising and a second piece protruding downward from a tip of the first piece, a plate-shaped upper insulation material located below the mounting member, with a first main surface abutting the side of the rising and a lower surface running along the horizontal direction, a plate-shaped lower insulation material located below the upper insulation material with a gap therebetween, with a first main surface abutting the side of the rising and a top surface running along the horizontal direction, and a base material and an upper insulation ... A construction method for a foundation structure comprising a plurality of porous granules positioned in the gap between the upper insulation material and the lower insulation material, and an anti-termite member having an anti-termite agent held in the porous granules, the construction comprising a first step of pouring the foundation, a second step of attaching the mounting member to the rise, a third step of attaching the lower insulation material to the rise, a fourth step of abutting the upper surface of the upper insulation material against the first piece of the mounting member, and then abutting the first main surface against the side surface of the rise to attach the upper insulation material to the rise, and a fifth step of arranging a plurality of porous granules in the gap between the upper insulation material and the lower insulation material.

[0011] Since the worker attaches the upper insulation material to the rising portion using the first piece of the mounting member as a reference, the worker can easily attach the upper insulation material to the rising portion. Also, the multiple porous granular bodies are held by being packed into the gap between the upper insulation material and the lower insulation material. Therefore, the worker can easily attach the upper insulation material to the rising portion. This eliminates the need to hold multiple porous granular bodies, making it easier to construct the foundation structure.

[0012] (3) A maintenance method for a foundation structure according to the present invention includes a foundation having a rising extending in an extension direction along a horizontal direction, a mounting member attached to the rising and having a first piece extending in a direction intersecting a side of the rising and a second piece protruding downward from a tip of the first piece, a plate-shaped upper insulation located below the mounting member, with a first main surface abutting the side of the rising and a lower surface running along the horizontal direction, a plate-shaped lower insulation located below the upper insulation with a gap therebetween, with a first main surface abutting the side of the rising and a top surface running along the horizontal direction, and a plurality of porous insulation members located in the gap between the upper insulation and the lower insulation. 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 into the gap between the upper insulation material and the lower insulation material.

[0013] 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. Therefore, it is not necessary to insert nozzles into multiple positions to inject the anti-termite agent, which saves the worker time.

[0014] (4) The foundation structure may further include a sheet member that closes an opening in a gap between the upper insulation material and the lower insulation material, and the first step may include a step of providing a through hole in the sheet member.

[0015] 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

[0016] According to the present invention, construction and maintenance of a foundation structure having anti-termite properties can be carried out easily and reliably. [Brief description of the drawings]

[0017] [Figure 1] FIG. 1(A) is an oblique view of a portion of a foundation structure 10 relating to the first embodiment, and FIG. 1(B) is an oblique view of a portion of the foundation structure 10 with an upper exterior material 25 and a lower exterior material 35 removed. [Diagram 2] FIG. 2 is an explanatory diagram illustrating the process of pouring the continuous footing 11. [Diagram 3] FIG. 3(A) is a perspective view of a drain receiving metal fitting 75, FIG. 3(B) is a cross-sectional view of an upper insulation material set 17, and FIG. [Figure 4] FIG. 4 is a vertical cross-sectional view of the foundation structure 10. As shown in FIG. [Diagram 5] FIG. 5 is an explanatory diagram for explaining a construction method of the foundation structure 10. As shown in FIG. [Figure 6] FIG. 6 is an explanatory diagram for explaining a maintenance method for the foundation structure 10. As shown in FIG. [Figure 7] FIG. 7 is an explanatory diagram illustrating a lower insulation material 37 in a modified example. [Figure 8] FIG. 8 is an explanatory diagram illustrating a construction method for the foundation structure 10 according to the second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] 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.

[0019] [First embodiment] 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, an upper insulation material set 17, a lower insulation material set 18, a water drain receiving metal fitting 75, a water drain member 40, and a joint material 64. Note that a slab footing may be used instead of the continuous footing 11.

[0020] The continuous footing 11 includes a footing 12, a rising 13, and a plurality of anchor bolts 14. The footing 12 is buried in the ground as shown in FIG. 4. The rising 13 protrudes upward from the footing 12. That is, the rising 13 protrudes upward from the ground. An upper surface 16 of the rising 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.

[0021] 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 continuous footing 11. The step of pouring the foundation is an example of the first step.

[0022] 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.

[0023] 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.

[0024] 4 is a member that supports the drain member 40 and positions and levels the upper insulation material set 17 when constructing the foundation structure 10. The drain metal fitting 75 is an example of a mounting member.

[0025] 3(A), the drain receiving fitting 75 has a generally U-shaped cross section and has three pieces: an attachment piece 76, a first piece 77, and a second piece 78. The drain receiving fitting 75 is manufactured, for example, by bending a steel plate by press processing.

[0026] The mounting piece 76 is in the form of a rectangular plate and has an insertion hole 79 through which a bolt is inserted. In the illustrated example, two insertion holes 79 are provided in the mounting piece 76. For example, a worker fastens a bolt (not shown) inserted into the insertion hole 79 to a nut embedded in the upper end of the rise 13 of the slab footing 11 to attach the water drain receiving fitting 75 to the rise 13 ( FIG. 5(A) ). That is, as shown in FIG. 4 , the mounting piece 76 is fixed to the upper end of the rise 13 with its main surface abutting against the side surface 15 of the rise 13. The process of attaching the water drain receiving fitting to the rise 13 is an example of the second process.

[0027] As shown in Fig. 3(A), the first piece 77 is a rectangular plate and protrudes from one end (the upper end in the figure) of the mounting piece 76 in the longitudinal direction in a direction perpendicular to the main surface of the mounting piece 76. That is, as shown in Fig. 4, the first piece 77 extends in a direction perpendicular to the side surface of the rising portion 13 (width direction 8). The width direction 8 is an example of a direction intersecting with the side surface of the rising portion.

[0028] As shown in Fig. 3(A), the second piece 78 protrudes from the tip of the protrusion of the first piece 77 in a direction perpendicular to the main surface of the first piece 77 (downward in the figure), and faces the attachment piece 76. As shown in Fig. 4, the second piece 78 abuts against a drainage piece 42 of the drainage member 40, which will be described later. That is, the second piece 78 is used to align the drainage member 40 and hold the drainage piece 42.

[0029] As shown in FIG. 1, a plurality of water cut receiving brackets 75 are attached to the riser 13. The plurality of water cut receiving brackets 75 are arranged spaced apart from each other in the extension direction 9. In the example shown in FIG. 1, two water cut receiving brackets 75 are attached to the riser 13 for one upper insulation material set 17. The two water cut receiving brackets 75 position and level the upper insulation material set 17 at both ends of the upper insulation material set 17 in the extension direction 9. Note that one water cut receiving bracket 75 may be attached to the riser 13 for one upper insulation material set 17, or three or more water cut receiving brackets 75 may be attached to the riser 13 for one upper insulation material set 17.

[0030] 4, the drainage member 40 has an inclined piece 41, a drainage piece 42, and an attachment part (not shown). The drainage member 40 is manufactured, for example, by bending a steel plate by press working to form the inclined piece 41 and the drainage piece 42, and then welding the attachment part.

[0031] The inclined piece 41 extends from the second piece 78 of the drainage receiving fitting 75 toward above the rising 13. That is, the inclined piece 41 is inclined with respect to the horizontal and vertical directions, and guides rainwater and the like from above the rising 13 toward the outside of the upper exterior material 25 described below. The inclined piece 41 is also a long member that extends along the extension direction 9 (FIG. 1) in which the rising 13 extends, and prevents water from flowing into the rising 13 or into the upper insulation material 20 and lower insulation material 30 described below over the entire length of the rising 13 in the extension direction 9. Note that the drainage member 40 is omitted from FIG. 1.

[0032] The drainage piece 42 protrudes downward from the lower end of the inclined piece 41. The drainage piece 42 abuts against the second piece 78 of the drain receiving fitting 75 in the width direction 8. The drainage piece 42 abuts against the second piece 78, thereby positioning the drainage member 40 in the width direction 8. In addition, the drainage piece 42 abuts against the second piece 78, thereby suppressing deformation in the width direction 8.

[0033] As shown by the arrows in FIG. 4, water flowing in from the inclined piece 41 flows down the drainage piece 42 and is drained to the outside of the exterior materials 25, 35.

[0034] The mounting portion is connected to the inclined piece 41. The drip-water member 40 is attached to the drip-water receiving fitting 75 by fixing the mounting portion to the drip-water receiving fitting 75 with screws or the like (FIG. 5(F)). That is, the drip-water member 40 is supported by each of the drip-water receiving fittings 75 at multiple points in the extension direction 9 (FIG. 1). The step of attaching the drip-water member 40 to the drip-water receiving fitting by an operator may be performed before the step of attaching the upper insulation material 20 and the lower insulation material 30 described below to the rise 13 of the slab 11 (FIGS. 6(A)-(C)), or may be performed after the step of arranging the porous granular material 61 described below in the arrangement space 62 (FIG. 6(D)) or after the step of applying the joint material 64 (FIG. 6(E)).

[0035] As shown in FIG. 3(B), the upper insulation material set 17 includes an upper insulation material 20 and an upper exterior material 25 attached to the upper insulation material 20.

[0036] The upper insulation material 20 is a rectangular plate having two main surfaces 21, 22 and four end surfaces. As shown in Fig. 4, the length of one side of the upper insulation material 20 (the length in the vertical direction in the figure) is, for example, about half the length of the rising portion 13 in the vertical direction. Note that if the upper insulation material 20 is cheaper than the lower insulation material 30, the length of the upper insulation material 20 in the vertical direction may be made longer to the extent possible.

[0037] The upper insulation material 20 is 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). Also, 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. The upper insulation material 20 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.

[0038] The thickness of the top insulation material 20 is within a range of several tens of mm to one hundred and several tens of mm. The length of the top insulation material 20 in the extension direction 9 is within a range of several tens of cm to two hundred and several tens of cm. The length of the top insulation material 20 in the vertical direction is within a range of several tens of cm to one hundred and several tens of cm. The top 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.

[0039] The upper exterior material 25 is in the form of a rectangular plate. The upper exterior material 25 is, for example, an inorganic molding material having a thickness of about several mm. The main surface of the upper exterior material 25 has substantially the same shape and size as the main surface 22 of the upper insulation material 20. The upper exterior material 25 is integrated with the upper insulation material 20 by, for example, attaching the main surface to the main surface 22 of the upper insulation material 20 with an adhesive or the like. The upper exterior material 25 and the upper insulation material 20 may be integrated in a factory or the like other than the construction site, or may be integrated at the construction site by a worker. The main surface 22 of the upper insulation material 20 is an example of a second main surface.

[0040] For example, the worker applies adhesive to the upper part of the side surface 15 of the riser 13 or the main surface 21 of the upper insulation material 20, and then, as shown in FIG. 5(A), fits the upper end of the upper insulation material set 17 into the water-cutting bracket 75 from diagonally below so that the main surface 21 of the upper insulation material 20 does not contact the side surface 15 of the riser 13. The worker rotates the upper insulation material set 17 around the upper end of the upper insulation material set 17 as an axis, and presses the main surface 21 of the upper insulation material 20 against the upper part of the side surface 15 of the riser 13 to attach the upper insulation material set 17 to the upper part of the riser 13 (FIG. 5(B)). For example, a modified silicone adhesive is used as the adhesive. The riser 13 to which the upper insulation material set 17 is attached forms the outer periphery of the foundation structure 10, and the side surface 15 is a so-called outer surface facing the outside of the building. The main surface 21 of the top insulation material 20 that contacts the side surface 15 of the rising portion 13 is an example of a first main surface. The process of attaching the top insulation material 20 to the rising portion 13 is an example of a third process.

[0041] The upper end of the upper insulation material set 17 abuts against the first piece 77 of the water drain receiving metal fitting 75, so that the upper insulation material set 17 is positioned in the vertical direction and is leveled. That is, the water drain receiving metal fitting 75 makes it easier for the worker to attach the upper insulation material set 17 to the rising portion 13. Two of the four end faces of the upper insulation material 20 of the upper insulation material set 17 attached to the rising portion 13 are aligned in the horizontal direction, and the other two end faces are aligned in the vertical direction. Of the two end faces aligned in the horizontal direction, the upper end face is the upper face 23, and the lower end face is the lower face 24. That is, the lower face 24 of the upper insulation material 20 is a rectangular flat surface extending along the width direction 8 and the extension direction 9 and along the extension direction 9. The lower face 24 is located near the middle position of the rising portion 13 in the vertical direction. In the following, the above two end faces aligned in the vertical direction will be described as side end faces.

[0042] As shown in Fig. 1, a plurality of upper insulation material sets 17 are attached to the rising portion 13. The plurality of upper insulation material sets 17 are arranged adjacent to one another in the extension direction 9. That is, the side end surface of one upper insulation material 20 abuts against the side end surface of another adjacent upper insulation material 20.

[0043] The lower surfaces 24 of the plurality of adjacent upper insulation materials 20 are aligned with almost no step. That is, the lower surfaces 24 are almost flush with each other.

[0044] As shown in FIG. 3(C), the lower insulation set 18 includes a lower insulation material 30 and a lower exterior material 35. The lower insulation set 18 has the same configuration (specifications) as the upper insulation set 17. That is, the lower insulation material 30 has the same configuration as the upper insulation material 20, and the lower exterior material 35 has the same configuration as the upper exterior material 25. However, the configuration of the lower insulation set 18 may be different from the configuration of the upper insulation set 17. For example, the length of the lower insulation material 30 and the lower exterior material 35 in the vertical direction may be longer or shorter than the length of the upper insulation material 20 and the upper exterior material 25 in the vertical direction. In the following, the main surfaces of the lower insulation material 30, which is a rectangular plate, will be described as main surfaces 31 and 32.

[0045] After applying adhesive to the lower part of the side surface 15 of the riser 13 or the main surface 31 of the bottom insulation 30, the worker attaches the bottom insulation set 18 to the riser 13 below the top insulation set 17, leaving a gap between the top insulation set 17 and the bottom insulation set 18, and abutting the main surface 31 of the bottom insulation 30 against the lower part of the side surface 15 of the riser 13 (FIG. 5(C)). At that time, the worker attaches the top insulation set 17 to the riser 13 so that one end surface (top surface) of the bottom insulation 30 is parallel to the bottom surface 24 of the top insulation 20. In other words, the worker installs the bottom insulation set 18 based on the top insulation set 17. The process of attaching the bottom insulation 30 to the riser 13 is an example of the fourth process.

[0046] Of the four end faces of the lower insulation 30 of the lower insulation set 18 attached to the rising portion 13, two end faces are along the horizontal direction, and the other two end faces are along the vertical direction. Of the two end faces along the horizontal direction, the upper end face is the upper face 33, and the lower end face is the lower face 34. That is, the upper face 33 of the lower insulation 30 is a rectangular plane extending along the width direction 8 and the extension direction 9 and along the extension direction 9. The upper face 33 faces the lower face 24 of the upper insulation 20 in the vertical direction. The space between the upper face 33 of the lower insulation 30 and the lower face 24 of the upper insulation 20 is the gap between the upper insulation 20 and the lower insulation 30. In the following, the above two end faces along the vertical direction among the four end faces of the lower insulation 30 are described as side end faces.

[0047] As shown in Fig. 1, multiple bottom insulation sets 18 are attached to the rising portion 13. The multiple bottom insulation sets 18 are arranged adjacent to one another in the extension direction 9. That is, the side end face of one bottom insulation 30 abuts against the side end face of another adjacent bottom insulation 30.

[0048] The upper surfaces 33 of the adjacent bottom insulation materials 30 are aligned with almost no step between them. In other words, the upper surfaces 33 are almost flush with each other.

[0049] 4, the gap between the lower surface 24 of the upper insulation material 20 and the upper surface 33 of the lower insulation material 30 is a space in which the anti-termite member 60 is disposed. Hereinafter, this gap will be described as an arrangement space 62.

[0050] The distance L1 between the lower surface 24 of the upper insulation material 20 and the upper surface 33 of the lower insulation material 30, i.e., the length L1 of the arrangement space 62 in the vertical direction, is shorter than the protruding length L2 of the second piece 78 of the above-mentioned water drain receiving bracket 75. Therefore, if the lower insulation material set 18 is attached to the rising portion 13 before the upper insulation material set 17, the second piece 78 makes it difficult to attach the upper insulation material set 17 to the rising portion 13. Therefore, after the upper insulation material set 17 is attached to the rising portion 13, the lower insulation material set 18 is attached to the rising portion 13.

[0051] The anti-termite member 60 includes a plurality of porous granular bodies 61 and an anti-termite agent. The porous granular bodies 61 have a plurality of pores and are capable of holding the liquid anti-termite agent.

[0052] As shown in Fig. 5(D), the worker packs a plurality of porous granular bodies 61 into the arrangement space 62. For example, the worker impregnates the porous granular bodies 61 with an anti-termite agent and then packs them into the arrangement space 62, or packs the porous granular bodies 61 into the arrangement space 62 and then injects the anti-termite agent into the arrangement space 62. The numerous porous granular bodies 61 are held in the arrangement space 62 by being pressed against the lower surface 24 of the upper insulation material 20 and the upper surface 33 of the lower insulation material 30. The step of arranging the plurality of porous granular bodies 61 in the arrangement space 62 is an example of the fifth step.

[0053] 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.

[0054] As shown in Fig. 4, the gap between the upper exterior material 25 and the lower exterior material 35 is filled with, for example, a modified silicone-based joint material 64. After a worker packs a plurality of porous granular bodies 61 into the arrangement space 62 (Fig. 5(D)), as shown in Fig. 5(E), the worker injects the joint material 64 into the gap between the upper exterior material 25 and the lower exterior material 35 to install the joint material 64. The installed joint material 64 closes the opening of the arrangement space 62 as shown in Fig. 4. The joint material 64 that closes the opening of the arrangement space 62 prevents the anti-termite agent from leaking out from the opening.

[0055] The joint material 64 is located to the side of the anti-termite member 60 and is aligned with the anti-termite member 60 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.

[0056] 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 30 and the side surface 15 of the riser 13, and into the gaps between the multiple adjacent bottom insulation materials 30. The anti-termite agent that penetrates into the gaps prevents termites from invading the structure through the gaps. The anti-termite agent is prevented from leaking out of the openings of the arrangement space 62 by the joint material 64 that closes the openings. In other words, the anti-termite agent efficiently penetrates into the gaps between the bottom insulation material 30 and the side surface 15 of the riser 13, and into the gaps between the multiple adjacent bottom insulation materials 30.

[0057] 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.

[0058] In this maintenance, a worker uses a needle-shaped tool to make a through hole 65 (FIG. 6) in the joint material 64. The process in which the worker makes the through hole 65 in the joint material 64 is an example of the first process.

[0059] After providing the through-hole 65, the worker inserts the nozzle 71 of the agent injection device 70 into the through-hole 65 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 30, and into the gaps between the adjacent lower insulation materials 30, preventing termites from invading the building frame through the gaps. When the anti-termite agent spreads into the arrangement space 62, the joint material 64 prevents it from flowing out of the opening of the arrangement space 62. The process in which the worker inserts the nozzle 71 into the through-hole 65 of the joint material 64 is an example of the second process. The process in which the worker injects the anti-termite agent into the arrangement space 62 is an example of the third process.

[0060] [Effects of the first embodiment] In this embodiment, a large number of porous granular bodies 61 are held in the arrangement space 62 by being pressed against the lower surface 24 of the upper insulation material 20 and the upper surface 33 of the lower insulation material 30. This makes it easier to construct the foundation structure 10.

[0061] In this embodiment, the top insulation material 20 is positioned by abutting against the first piece 77 of the water drain receiving fitting 75, and then attached to the rise 13 of the continuous footing 11. This makes it easier for a worker to position the top insulation material 20 when attaching it to the rise 13. In other words, construction of the foundation structure 10 becomes easier.

[0062] Furthermore, in this embodiment, during maintenance of the foundation structure 10, the anti-termite agent injected into the gap (arrangement space 62) between the upper insulation material 20 and the lower 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 are not provided from one end of the joint material 64 to the other end 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.

[0063] In addition, in this embodiment, since the upper exterior material 25 and the upper insulation material 20 are integrated, the labor required by workers is reduced compared to installing the upper exterior material 25 and the upper insulation material 20 separately. Similarly, since the lower exterior material 35 and the lower insulation material 30 are integrated, the labor required by workers is reduced compared to installing the lower exterior material 35 and the lower insulation material 30 separately. As a result, construction of the foundation structure 10 becomes even easier.

[0064] In addition, since the anti-termite members 60 are located deep inside the joint material 64, the worker can inject the anti-termite agent into the arrangement space 62 in which the porous granular material 61 is arranged through the joint material 64 without checking the position of the anti-termite members 60. In other words, the worker is saved from the trouble of checking the position of the anti-termite members 60. As a result, maintenance of the foundation structure becomes even easier.

[0065] In addition, since the joint material 64 closes the opening of the arrangement space 62, it is possible to prevent the anti-termite agent from leaking out of the arrangement space 62.

[0066] Furthermore, in this embodiment, after the upper insulation set 17 is attached to the rising portion 13, the lower insulation set 18 is attached to the rising portion 13. Therefore, the length L1 (FIG. 4) of the gap between the upper insulation material 20 and the lower insulation material 30 in the vertical direction can be made shorter than the protruding length L2 of the second piece 78 of the water drain receiving metal fitting 75. As a result, it is possible to prevent a situation in which the length of the gap between the upper insulation material 20 and the lower insulation material 30 in the vertical direction becomes excessively long, resulting in an excessive number of porous granular bodies 61 being used, or the number of porous granular bodies 61 being too small compared to the length of the gap, resulting in the porous granular bodies 61 not being retained in the arrangement space 62.

[0067] [Second embodiment] In this embodiment, an example will be described in which the lower insulation material 30 is attached to the rising portion 13 of the continuous footing 11, and then the upper insulation material 20 is attached to the rising portion 13. The configuration of the foundation structure 10 is the same as the configuration of the foundation structure 10 described in the first embodiment.

[0068] After constructing the slab 11 in the same manner as in the first embodiment, the worker attaches a water cut receiving fitting 75 to the rise 13 of the slab 11 (FIG. 8(A)). The process of constructing the slab 11 is an example of a first process. The process of attaching the water cut receiving fitting 75 to the rise 13 of the slab 11 is an example of a second process.

[0069] Next, the worker applies adhesive to the lower part of the side surface 15 of the riser 13 or the main surface 31 of the bottom insulation material 30, and then abuts the main surface 31 of the bottom insulation material 30 against the lower part of the side surface 15 of the riser 13 to attach the bottom insulation material set 18 to the riser 13 (FIG. 8(B)). The process of attaching the bottom insulation material 30 to the riser 13 is an example of the third process.

[0070] Next, the worker applies adhesive to the upper part of the side surface 15 of the riser 13 or the main surface 21 of the upper insulation material 20, and then, as shown in Fig. 8(C), fits the upper end of the upper insulation material set 17 into the water drain bracket 75 from diagonally below so that the main surface 21 of the upper insulation material 20 does not contact the side surface 15 of the riser 13. The worker rotates the upper insulation material set 17 around the upper end of the upper insulation material set 17 as an axis, and presses the main surface 21 of the upper insulation material 20 against the upper part of the side surface 15 of the riser 13 to attach the upper insulation material set 17 to the upper part of the riser 13. The process of attaching the upper insulation material 20 to the riser 13 is an example of the fourth process.

[0071] Next, as shown in Fig. 8(D), the worker packs the plurality of porous granular bodies 61 into the arrangement space 62. For example, the worker impregnates the porous granular bodies 61 with an anti-termite agent and then packs them into the arrangement space 62, or packs the porous granular bodies 61 into the arrangement space 62 and then injects the anti-termite agent into the arrangement space 62. The numerous porous granular bodies 61 are held in the arrangement space 62 by being pressed against the lower surface 24 of the upper insulation material 20 and the upper surface 33 of the lower insulation material 30. The step of arranging the plurality of porous granular bodies 61 in the arrangement space 62 is an example of the fifth step.

[0072] Next, as shown in FIG. 8(E), the worker injects the joint material 64 into the gap between the upper exterior material 25 and the lower exterior material 35, and installs the joint material 64.

[0073] Next, as shown in Fig. 8(F), the worker attaches the drainage member 40 to the drainage receiving metal fitting 75. The step of attaching the drainage member 40 to the drainage receiving metal fitting 75 by the worker may be performed before the step of installing the joint material 64 by the worker or the step of installing the upper insulation material 20 or the lower insulation material 30 by the worker.

[0074] The maintenance of the foundation structure 10 is carried out in the same manner as in the first embodiment.

[0075] [Effects of the second embodiment] In this embodiment, a large number of porous granular bodies 61 are held in the arrangement space 62 by being pressed against the lower surface 24 of the upper insulation material 20 and the upper surface 33 of the lower insulation material 30. This makes it easier to construct the foundation structure 10.

[0076] In this embodiment, the top insulation material 20 is positioned by abutting against the first piece 77 of the water drain receiving fitting 75, and then attached to the rise 13 of the continuous footing 11. This makes it easier for a worker to position the top insulation material 20 when attaching it to the rise 13. In other words, construction of the foundation structure 10 becomes easier.

[0077] [Variations] In this modified example, a foundation structure 10 (FIG. 1) is described that includes a lower insulation material 37 shown in FIGS. 7(B) and (C) instead of the lower insulation material 30 shown in FIG. 3(C). Note that the same components as those described in the first 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 first embodiment.

[0078] The lower insulation 37 has an insulation body 80 shown in Fig. 7(A) and a sheet member 90 (Fig. 7(B)) attached to the insulation body 80. The configuration of the insulation body 80 is the same as that of the lower insulation 30, 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.

[0079] The sheet member 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 or modified silicone. That is, the sheet member 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 93 of the sheet member 90, which is continuous with the part attached to the main surface 82 of the heat insulating material body 80, protrudes obliquely upward from the upper end of the main surface 82 of the heat insulating material body 80. In addition, an end 94 of the sheet member 90, which is continuous with the part attached to the upper surface 83 of the heat insulating material body 80, protrudes obliquely upward from the end where the upper surface 83 and the main surface 82 of the heat insulating material body 80 intersect. The end 93 and the end 94 are attached to each other by an adhesive such as hot melt or modified silicone, and form a protruding piece 92. That is, the sheet member 90 has a sheet body 91 which is a portion attached to the thermal insulation material body 80, and a protruding piece 92 which protrudes obliquely upward from the sheet body 91. The protruding piece 92 protrudes from an end where the main surface 82 and the upper surface 83 of the thermal insulation material body 80 intersect. The sheet member 90 may be made of one sheet or may be made of multiple sheets.

[0080] The sheet member 90 preferably has a hardness that termites cannot gnaw at. For example, the sheet member 90 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 90 has a thickness in the range of about 10 μm to 400 μm. More preferably, the sheet member 90 has a thickness in the range of about 40 μm to 80 μm. For example, the sheet member 90 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 90 having thicknesses and materials other than those described above may be used.

[0081] The lower exterior material 35 is attached to the main surface 22 of the lower insulation material 37 to produce the lower insulation material set 18.

[0082] The worker abuts the main surface 21 of the bottom insulation 37 against the side surface 15 (FIG. 3) of the rising portion 13 and attaches the bottom insulation 37 to the rising portion 13. Next, the worker uses the protruding piece 92 of the sheet member 90 as a guide to pack the multiple porous granular bodies 61 into the arrangement space 62. Thereafter, the worker folds the protruding piece 92 and pushes it into the arrangement space 62, and then installs the joint material 64.

[0083] [Effects of modified examples] In this modified example, the protruding pieces 92 of the sheet member 90 are used as guides when a worker packs the porous granular bodies 61 into the arrangement space 62. This reduces the labor required for the worker to pack the porous granular bodies 61 into the arrangement space 62 compared to when the protruding pieces 92 are not provided. As a result, construction of the foundation structure 10 becomes even easier.

[0084] Furthermore, in this modification, the sheet member 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 damaged by termites.

[0085] In addition, since the upper surface 83 of the thermal insulation material body 80 is covered with the sheet body 91 of the sheet member 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.

[0086] The sheet body 91 of the sheet member 90 does not have to cover the heat insulating material body 80. For example, the sheet body 91 may be attached only to the upper surface 83 or only to the main surface 82 of the heat insulating material body 80.

[0087] [Other variations] In the above-described first and second embodiments, examples have been described in which the upper insulation material 20 and the upper exterior material 25 are installed as a single unit, and the lower insulation material 30 and the lower exterior material 35 are installed as a single unit. However, it is also possible to attach the upper insulation material 20 to the rising portion 13, and then attach the upper exterior material 25 to the upper insulation material 20, and attach the lower insulation material 30 to the rising portion 13, and then attach the lower exterior material 35 to the lower insulation material 30.

[0088] In the above-described first and second embodiments, examples have been described in which the upper exterior material 25 and the lower exterior material 35 are attached to the upper insulation material 20 and the lower insulation material 30. However, the upper exterior material 25 and the lower exterior material 35 do not have to be attached to the upper insulation material 20 and the lower insulation material 30.

[0089] In the above-mentioned first and second embodiments, an example was described in which the upper insulation material 20 and the lower insulation material 30 were 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 upper insulation material 20 and the lower insulation material 30 may be attached to the inner surface of the rise 13. In that case, the upper exterior material 25 and the lower exterior material 35 are not provided. For example, a concrete floor is provided that abuts against the main surface 32 of the lower insulation material 30 at a position below the upper surface 33 of the lower insulation material 30. That is, the opening of the arrangement space 62 is exposed to the outside. During maintenance, the worker injects the anti-termite agent from the opening of the arrangement space 62 exposed to the outside. Note that the lower insulation material 37 described in the modified example may be used instead of the lower insulation material 30. In that case, the protruding piece 92 of the lower insulation material 37 is attached to the upper surface of the concrete floor or the main surface 22 of the upper insulation material 20.

[0090] In the above-mentioned first and second embodiments, an example has been described in which the water drain receiving bracket 75 is used as a member for positioning the upper insulation material 20. However, a mounting member for positioning the upper insulation material 20 may be attached to the riser 13 in addition to the water drain receiving bracket 75. The mounting member may have the same shape as the water drain receiving bracket 75, or may have a different shape. For example, the member is formed with an L-shaped cross section having an attachment piece 76 and a first piece 77.

[0091] In the above embodiment, an example has been described in which the length L1 of the arrangement space 62 in the up-down direction is shorter than the protruding length L2 of the second piece 78 of the drain receiving fitting 75. However, the length L1 may be longer than the protruding length L2. [Explanation of symbols]

[0092] 10...Foundation structure 11. Strip foundation (foundation) 13. Start up 15. Side 17···Top insulation set 18···Lower insulation set 20. Top insulation 21... Principal surface (first principal surface) 22... Principal surface (second principal surface) 24...Bottom surface 25...Top exterior material 30... Bottom insulation 31... Main surface (first main surface) 32... Principal surface (second principal surface) 33...Top surface 35...Lower exterior material 40....Draining member 60... Termite-proof material 61...Porous granular material 62... Placement space (gap) 64...Joint material 65...Through hole 71 Nozzle 75···Water drain bracket 77...1st piece 78...2nd piece 80···Insulation body (lower insulation) 90... Sheet member 91 Seat body 92...Protruding piece

Claims

1. The present invention relates to a foundation having a rise extending in an extension direction along a horizontal direction, a mounting member attached to the rise and having a first piece extending in a direction intersecting a side of the rise and a second piece protruding downward from a tip of the first piece, a plate-shaped upper insulation material located below the mounting member, with a first main surface abutting the side of the rise and a lower surface running along the horizontal direction, and a plate-shaped lower insulation material located below the upper insulation material with a gap therebetween, with a first main surface abutting the side of the rise and a top surface running along the horizontal direction. A maintenance method for a foundation structure comprising: an insulating material; an anti-termite member having a plurality of porous granules located in a gap between the upper insulating material and the lower insulating material, and an anti-termite agent held in the porous granules; an upper exterior material covering a second main surface of the upper insulating material; a lower exterior material covering the second main surface of the lower insulating material and located below the upper exterior material in the vertical direction with a gap therebetween; and a joint material located in the gap between the upper exterior material and the lower exterior material and closing an opening of the gap between the upper insulating material and the lower insulating material, 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 from the nozzle into the gap between the upper insulation material and the lower insulation material.

2. The foundation structure further includes a sheet member that closes an opening of a gap between the upper insulation material and the lower insulation material, The maintenance method for a foundation structure according to claim 1 , wherein the first step includes a step of providing a through hole in the sheet member.

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