JP2003166295A - Termite preventive structure of building and termite preventive construction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To further improve a termite preventive technique by which a termite preventive sheet and an earthen floor concrete layer are combined together and improve a termite preventive function between the earthen floor concrete layer and a foundation structure of a continuous footing or the like. <P>SOLUTION: The termite preventive structure in the underfloor space U of a building is provided with a bottom face termite preventive sheet 40 covering the ground surface E of the underfloor space U, an end part termite preventive sheet 20 covering from the side face of the foundation structure 10 of the space U to the ground surface E and superimposed on the bottom face termite preventive sheet 40 in the ground surface E, a joint part 30 where the end part termite preventive sheet 20 is jointed with the foundation structure 10, and the earthen floor concrete layer 50 placed while covering a part covering the ground surface E in the end part termite preventive sheet 20 and the bottom face termite preventive sheet 40. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-termite structure for a building and an anti-termite construction method, and more particularly, to an anti-termite structure installed in an underfloor space in order to prevent termite damage to a building. It is intended for the construction method of various anti-termite structures.

[0002]

2. Description of the Related Art As a measure against termites in a building, an anti-termite sheet is laid in the space under the floor. As the ant-preventive sheet, one made of a resin material that cannot be eroded by termites, one having a chemical agent having an action of exterminating termites, and one having a chemical agent repelled by termites are used. As an underfloor structure of a building, a thick concrete layer may be placed on the ground surface of the underfloor space. Such a concrete layer is called soil concrete.

It is said that the soil concrete has a function of preventing seepage water from the ground and also a function of preventing termites from entering the ground surface of the space under the floor. In order to enhance the anti-termite effect of the underfloor space, it has been proposed to lay an anti-termite sheet on the ground surface of the underfloor space and then pour a concrete layer between the soil. Since the ant-proof sheet is pressed down by the soil concrete layer, the ant-proof sheet can be prevented from rolling up, and it is also possible to prevent the formation of a gap between the ant-proof sheet and the ground surface. ing. However, the soil concrete layer may have a gap between it and the cloth foundation due to shrinkage or change with time in the hardening process after casting. Termites must penetrate from the ground along the surface of the cloth foundation, beyond the edge of the anti-termite sheet, and into the space under the floor and the building members above the cloth foundation through the gap between the soil concrete layer and the cloth foundation. There is.

Japanese Examined Patent Publication No. 7-86251, JP-A-200
1-40791, JP 2001-49753 A, and the like propose various techniques for enhancing the termite prevention function in an underfloor structure having an earthen concrete layer. For example, there is a technique for filling a boundary portion between a soil concrete layer and a cloth foundation with an anti-termite agent to prevent termites from intruding from this portion. Fill the boundary between the ground and the fabric foundation with an anti-termite agent, and attach a barrier sheet between the top surface of the soil concrete layer and the side surface of the fabric foundation to prevent the filled anti-termite agent from leaching into the space under the floor. Techniques for putting on are also proposed.

[0005]

However, even if the soil concrete layer and the ant-proof sheet are combined and the ant-proof function between the end surface of the soil-concrete layer and the cloth foundation is enhanced, termite invasion occurs. In some cases, it cannot be reliably blocked. For example, even if an anti-termite agent is filled or an anti-termite sheet is installed between the end surface of the soil concrete layer and the cloth foundation, if the deformation of the soil concrete layer becomes large, there will be a gap between it and the cloth foundation. Therefore, the anti-termite effect is reduced. When a large external force is applied due to an earthquake or the like, a gap between the soil concrete layer and the cloth foundation may expand, or a large crack reaching the ground surface may occur in the soil concrete layer.

[0006] Therefore, an object of the present invention is to further improve the termite proofing technology in which the termite proof sheet and the soil concrete layer are combined to improve the termite proof function between the soil concrete layer and the basic structure such as the cloth foundation. Is to improve.

[0007]

A termite-proof structure according to the present invention is a termite-proof structure in an underfloor space of a building, wherein a bottom termitide sheet covering the ground surface of the underfloor space and a foundation of the underfloor space. An end dovetail sheet covering the side surface of the structure from the ground surface and overlapping with the bottom dovetail sheet on the ground surface, a joint part for joining the end dovetail sheet to the foundation structure, and the end dovetail sheet Among them, there is provided a soil concrete layer which is placed so as to cover a portion covering the ground surface and the bottom ant-prevention sheet. [Underfloor space] Applicable to the underfloor space of various buildings such as general houses and apartment buildings.

The underfloor space is a space surrounded by an upper structure such as a floor or a wall of a building, a basic structure such as a cloth foundation, and a ground surface. The foundation structure is constructed of concrete, reinforced concrete, concrete block, or the like, and includes structures called cloth foundation, bundle foundation, and the like. Equipment such as various pipes and ducts may be installed in the underfloor space, and such equipment can be regarded as part of the foundation structure.
Termites try to enter the underfloor space from within the ground. [Bottom ant-proof sheet] Basically, the same ant-proof sheet that is installed in a normal underfloor space can be used.

As a material for the bottom dovetail sheet, a resin sheet containing a usual dovetail inhibitor can be used. It is possible to use a sheet made of resin or metal that cannot be destroyed by termites even if it is not mixed with an anti-termite agent. A sheet made of a substance that repels termites or a sheet made of a material mixed with a repellent substance can be used. In addition to the termite-proof function, a material having a moisture-proof function and an antibacterial function can also be used. Those having mechanical strength and durability that can withstand the weight of the soil concrete layer cast on the upper side are preferable. Specific examples of resin materials include polyolefin resins such as polypropylene and polyethylene,
Examples include EVA resins and polyamide resins such as nylon. Examples of the termite control agents include triazine type, chlornicotyl type, pyrethroid type and organic phosphorus type termite controlling agents. The ant-preventive agent can be blended in the resin material or can be coated on the surface of the resin sheet.

The bottom dovetail sheet is laid so as to cover the ground surface of the underfloor space. Basically, it is spread over the entire surface of the ground without any gaps. If the strip-shaped sheets are arranged side by side so as to partially overlap each other, the dovetail-proof function of the joint can be maintained. It is also possible to bond the sheet materials to each other by adhesion or heat fusion. Through holes or cuts can be provided in places where facility structures such as piping project on the ground surface. It is not necessary to cover the end surface of the ground surface with the bottom dovetail sheet at the place where the end dovetail sheet is arranged. It suffices if there is a portion on the ground surface that overlaps with the end dovetail sheet.

[End Termite-proof Sheet] It covers from the side surface of the foundation structure of the underfloor space to the ground surface, and is overlapped with the bottom termite-proof sheet on the ground surface. The same material as the bottom dovetail-proof sheet can be used as the material of the end-section dovetail-proof sheet. The same material as the bottom dovetail sheet may be used, or the material and thickness may be different. Similar to the bottom ant-proof sheet, it may be a material in which an ant-preventive agent is mixed, or a material in which no termite-preventive agent is mixed as long as it has a function of blocking passage of termites. It is preferable that the end dovetail sheet has a band shape that is easy to apply. By arranging the belt-like end-terminated sheet along the side surface of the foundation structure, it can hang naturally and cover the ground surface from the side surface of the foundation structure with a required width. The width of the band-shaped end-terminated sheet is usually set to 20 to 100 cm, though it varies depending on the structure of the underfloor space.

[0012] When the end dovetail sheet is made of a transparent or semi-transparent material, the sumitting line formed on the side surface of the foundation structure and for leveling the soil concrete layer is
It will be visible through the transparent anti-termite sheet, and the work will be easier. Furthermore, on the surface of the end dovetail sheet,
By printing a line or a mark indicating the level position of the soil concrete layer, the soil concrete layer can be easily placed. [Joining part] This is a structure in which the end dovetail preventive sheet is joined to the basic structure. Basically, a fixing means or a joining means for a general termite-proof sheet can be adopted.

It is preferable to employ a material or structure in which termites do not easily penetrate between the end termite-proof sheet and the basic structure as the joint. Specifically, various adhesives and pressure-sensitive adhesives can be used, depending on the material of the basic structure. As the adhesive, one-pack type and two-pack type adhesives are known, but the one-pack type adhesive is easier to work. Water-based or emulsion-type adhesive is easy to use. In addition to bonding, nailing or joining with screw nails can be used together. Adhesive tape or adhesive tape can also be used. Thermal bonding can also be adopted. A material having an anti-termite function or a material mixed with an anti-termite agent can be used as the material of the joint portion.

The joint portion can be provided on the entire surface of the facing portion between the end-terminated sheet and the basic structure, or can be provided only on a part thereof. However, in order to effectively prevent the invasion of termites that climb the side surface of the foundation structure, it is desirable that the joint portion is continuously provided in a strip shape on the side surface of the foundation structure over the entire length in the horizontal direction. If a strip-shaped joint is provided along the upper edge of the end-terminated sheet, the end-terminated sheet can be joined securely and the lower part of the end-terminated sheet is not weighed. The surface of the ground surface can be naturally covered from the side of the foundation structure. The width of the band-shaped joint can be set to 1 to 20 cm.

The joint portion may be provided not only at the upper end of the end dovetail preventive sheet, but also in the widthwise direction of the end dovetail preventive sheet or at an overlapping portion with the bottom dovetail preventive sheet. If the bottom dovetail sheet and the end dovetail sheet are joined together, it is effective to prevent a gap from being formed between the sheets and to prevent termites from entering. However, since the bottom dovetail-proof sheet and the end part dovetail-proof sheet are pressed against each other by placing an earth concrete layer, there is no need to have a joint part in the overlapping portion. [Soil concrete layer] Basically, the same material and structure as the soil concrete layer used in the underfloor space in a normal building are applied.

The soil concrete layer is cast so as to cover a portion of the end termite sheet which covers the ground surface and the bottom termite sheet. The material of the soil concrete layer is mortar or earth and sand, and if necessary, reinforcing bars are reinforced or reinforcements are embedded. The thickness of the soil concrete layer can be appropriately set depending on the construction conditions. The top of the soil concrete layer may be located on the side of the foundation structure at a position lower than the top of the end termite sheet or the joint, or the earth concrete layer may completely fill the end termite sheet. Good. The concrete thickness of the soil concrete layer can be set in the range of 3 to 30 cm.

[Termite-preventing Method] In order to construct the termite-preventing structure, basically, the same technique as the ordinary termite-preventing method is used in combination. The individual working conditions, tools used, materials, etc. may be the same as in the ordinary termite control method. <Adhesive coating> A ant-preventive agent-containing adhesive to be a joint is coated on the side surface of the basic structure of the underfloor space along the horizontal direction. For coating the adhesive, a usual coating means such as a brush, a roller, or a spray can be adopted. In the case of a relatively viscous adhesive, if it is extruded from a container with a nozzle, it is easy to apply it as a continuous strip even in the middle of the vertical side surface of the foundation structure.

<Laying the end dovetail sheet> The end dovetail sheet is covered from the side of the foundation structure of the underfloor space to the ground surface, and the end dovetail sheet is bonded to the foundation structure with the adhesive applied in the previous step. To do. When the side surface of the foundation structure is a flat surface extending in the horizontal direction, the strip-shaped end-terminated sheet may be pasted on the adhesive that serves as the joint. When the basic structure has projections, depressions, or unevenness such as steps, it is desirable to cover the end dovetail sheet along the unevenness. It is also effective to form a notch or a through hole in a part of the end dovetail preventive sheet so as to easily follow the unevenness. It is preferable that the adhesive is used around the cuts and the through-holes so that there is no gap between the end-terminated sheet and the basic structure.

From the side surface of the basic structure,
Part of it is arranged so as to cover the ground surface as well. Of the end ant-proof sheets, the one with the wider part covering the ground surface can increase the overlap with the bottom ant-proof sheet to enhance the ant-proof function. However, it is uneconomical if the size of the end dovetail sheet becomes too large. In general, the width of the end dovetail sheet covering the ground surface can be set in the range of 10 to 90 cm. <Laying the bottom dovetail sheet> Cover the ground surface of the underfloor space and lay the bottom dovetail sheet on top of the end dovetail sheet.

Construction of the bottom dovetail sheet can be carried out in the same manner as the construction of the dovetail sheet in a normal underfloor space. At the overlapping portion, the end termite-proof sheet or the bottom termite-proof sheet may be placed on top. The end dovetail sheet is
A part of it is placed on the ground surface, so if you install a bottom dovetail sheet after laying the end dovetail sheet, inevitably,
Workability is good because a part of the bottom dovetail sheet is stacked on the edge dovetail sheet. Also, when pouring concrete between soils, concrete liquid may infiltrate into the gap between the bottom ant-proof sheet from the edge of the end ant-proof sheet, or the edge ant-proof sheet may roll up due to the pressure of the concrete solution. Is hard to get up.

However, it is also possible to stack the bottom dovetail sheet downward. For example, the edge of the end-termed ant-proof sheet may be slightly lifted and the bottom ant-terminated sheet may be sandwiched thereunder. By setting the overlapping width of the bottom dovetail sheet and the end dovetail sheet to be 5 to 30 cm, it is possible to sufficiently prevent termites from entering. The bottom dovetail sheet and the end dovetail sheet can be joined together with an adhesive or an adhesive tape. This is effective for preventing the infiltration of concrete liquid and curling of the ant-proof sheet.

When arranging strip-shaped bottom dovetail sheets laid all over the underfloor space, if adjacent sheets are piled up with a certain width, a gap is unlikely to occur and a good dovetail preventive effect can be maintained. Before constructing the bottom dovetail sheet or the end dovetail sheet, it is possible to spray the dovetail control agent on the ground surface or fill the boundary between the ground surface and the foundation structure with the dovetail control agent. it can. <Soil-to-concrete concrete placement> A soil-to-earth concrete layer is placed to cover the part of the edge ant-proof sheet that covers the ground surface and the bottom ant-proof sheet.

Basically, it can be carried out in the same manner as the construction of soil concrete in a normal underfloor space. It is desirable to prevent the bottom dovetail sheet and the edge dovetail sheet from rolling or moving due to the concrete placing work. The bottom dovetail sheet and the end dovetail sheet can also be temporarily fixed with gum tape, nailing or other fixing means. The bottom dovetail sheet and the end dovetail sheet should be laid with a certain allowance for expansion and contraction so that they will be pressed into close contact with the ground surface and the foundation structure under the weight of the cast concrete. It is desirable to keep.

Dirt concrete is the side of the foundation structure,
It may be driven to a position lower than the upper end of the end-terminated sheet, or the end-terminated sheet may be completely embedded. If part of the upper edge of the edge ant-proof sheet is above the soil concrete layer, it will be useful for checking the construction status and construction management. For example, in addition to forgetting to install the end ant-proof sheet, peeling or tearing of the end ant-proof sheet, infiltration of concrete between the end ant-proof sheet and the foundation structure can be found. When the placed concrete floor layer is hardened, the underfloor control method is completed. It is also possible to further attach a sheet having an anti-termite function, apply an anti-termite agent, or fill the space between the soil concrete layer and the side surface or the edge anti-termite sheet of the foundation structure.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION The termite structure for a building shown in FIGS. 1 and 2 is applied to an underfloor space of a house. [Structure of Building] A cloth foundation 10 made of concrete and having an inverted T-shaped cross section is constructed with a part thereof embedded in the ground E. The cloth foundation 10 is arranged in a lattice shape at a position that vertically and horizontally partitions the outer peripheral frame along the outer periphery of the building and the inside of the outer peripheral frame. On the cloth foundation 10, the outer wall 14 is constructed via the foundation 12, and the floor surface 18 is constructed via the joists 16 to construct the superstructure of the building.

A space surrounded by the cloth foundation 10 between the floor surface 18 and the ground E is an underfloor space U. In the underfloor space U, the side surface of the cloth foundation 10 is continuously coated with a narrow adhesive layer 30 along the horizontal direction in the middle of the height direction. The adhesive layer 30 is a paste-like adhesive filled in a tube container,
Construction is performed by pushing out from the tip nozzle of the tube container and pressing it against the surface of the cloth foundation 10. Specifically, the adhesive layer 30 can be applied with a width of 20 mm at a height position of 150 mm from the root of the cloth base 10. On the surface of the adhesive layer 30, the strip-shaped end-terminated sheet 20 is arranged. A resin sheet mixed with an anti-termite agent is used for the end termite-proof sheet 20. One side of the end-terminated sheet 20 is arranged at substantially the upper end of the adhesive layer 30. The end dovetail sheet 20 hangs down along the vertical side surface of the cloth foundation 10 and bends at the boundary between the cloth foundation 10 and the ground E, and a part thereof is placed on the ground surface E. As a specific example of the end part dovetail prevention sheet 20, an EVA resin sheet having a width of 330 mm can be used.

As shown in FIG. 2, a level line 21 extending in the lengthwise direction is printed on the surface of the end dovetail sheet 20 and can be used for determining the level of concrete pouring, which will be described later. A floor dovetail sheet 40 is laid on the ground surface E.
The floor dovetail sheet 40 is spread over the entire ground surface E in the underfloor space U. The end portion of the floor dovetail sheet 40 is placed on the end portion dovetail sheet 20 and is stacked. As a concrete example of the floor anti-termite sheet 40, a general termite-proof and moisture-proof sheet having a width of 1000 mm can be used. It is possible to set the stacking margin of the floor dovetail prevention sheet 40 and the end dovetail prevention sheet 20 to 150 mm.

A soil concrete layer 50 is cast on the floor ant-proof sheet 40. Dirt concrete layer 50
The floor surface dovetail sheet 40 depending on its weight.
Hold it down. In addition, the overlapping portion of the floor anti-termite sheet 40 and the end anti-termite sheet 20 also includes the soil concrete layer 50.
It is pressed against the ground surface E by. The side end surface of the soil concrete layer 50 is in close contact with the side surface of the cloth foundation 10 with the end dovetail sheet 20 interposed therebetween. A part of the end dovetail prevention sheet 20 is exposed slightly above the upper end of the soil concrete layer 50. The top position of the soil concrete layer 50 is
It is aligned with the level line 21 of the end dovetail sheet 20 and is used as a guide when pouring the concrete liquid.

In the above-mentioned underfloor space U, when a termite tries to enter from the ground E, the floor surface anti-termite sheet 40 covering the ground surface E first blocks the invasion. The floor dovetail sheet 40 is strongly pressed against the ground E by the weight of the soil concrete layer 50, and it is also difficult for termites to move in the gap between the floor dovetail sheet 40 and the ground surface E. Even if the termites try to pass through the gap between the floor ant-proof sheet 40 and the edge ant-proof sheet 20, the ant-terminated sheet 40 and the edge ant-proof sheet 20 are pressed by the soil concrete layer 50. You cannot pass. From the boundary between the ground surface E and the cloth foundation 10, the end part ant-preventing sheet 20 is arranged also on the side surface of the cloth foundation 10 and is fixed by the soil concrete layer 50, so that the penetration of termites is prevented. Even if the termite climbs vertically in the gap between the edge termite prevention sheet 20 and the cloth foundation 10, the adhesive layer 30 causes the edge termite control sheet 2 to move.
Since the gap between 0 and the cloth foundation 10 is closed, termites cannot enter the underfloor space U beyond the adhesive layer 30.

As described above, since the invasion of termites is blocked by the multiple barriers, the anti-termite function of the underfloor space U becomes extremely high. Dirt concrete layer 50
May shrink over time after construction. It may expand and contract due to changes in temperature. A load may be applied from the cloth foundation 10 side, or an external force such as an earthquake may be received. As a result, the soil concrete layer 50 is deformed or cracked. In particular, the space between the side surface of the cloth foundation 10 and the side end surface of the soil concrete layer 50 may spread.
Even in that case, the end dovetail sheet 2 is provided on the side surface of the cloth foundation 10.
If 0 is strongly bonded by the adhesive layer 30, the invasion of termites is prevented. Even if the soil concrete layer 50 shifts a little in the horizontal direction, if the floor-controlling sheet 40 and the edge-controlling sheet 20 are sufficiently overlapped, the floor-controlling sheet 40 and the edge-controlling sheet 40 from the ground E side. The termites do not enter the underfloor space U side beyond the ant sheet 20.

[Bundle-Based Dovetail-proof Structure] The embodiment shown in FIGS. 3 to 5 is a bundle-base dovetail-proof structure. As shown in FIG. 3, the bundle foundation 60 has a rectangular parallelepiped trapezoidal shape constructed of steel plate or concrete. Pillars are erected on the bundle foundation 60 to construct the superstructure of the building. Bundle foundation 60
Is arranged inside the underfloor space U surrounded by the cloth foundation 10. The end dovetail sheet 20 is arranged on each of four side surfaces of the bundle base 60. End dovetail sheet 2 on each side
No. 0 has a band shape as a whole, and is provided with overlapping pieces 22 and 24 by cutting in both end portions.

As shown in FIG. 4, on two side surfaces which are adjacent to each other at a right angle, the overlapping pieces 2 of the end termite-proof sheets 20 are stacked.
By stacking 2 and 24 on the mating pieces 22 and 24 on the other side,
There is no gap at the boundary between the end termite-proof sheets 20 to enhance the termite-proof function. An adhesive layer 30 similar to the above is formed along the upper edge of the side surface of the bundle base 60, and the end dovetail sheet 20 is attached to the surface of the adhesive layer 60.
Further, as shown in FIG. 4, the adhesive layer 32 is also arranged and joined to the overlapping portion of the overlapping pieces 22 and 24 of the end-terminated sheet 20. In this way, the four side surfaces of the bundle base 60 are surely covered with the end dovetail sheet 20.

As shown in FIG. 5, a floor dovetail prevention sheet 40 is laid on the ground surface E around the bundle foundation 60. The strip-shaped floor dovetail sheets 40 are arranged in parallel and are laid so that their side edges are slightly overlapped with each other. After that, the soil concrete layer 50 is placed. The soil concrete layer 50 fills the periphery of the bundle foundation 60 and is provided up to near the upper end of the end ant-proof sheet 20. Therefore, the soil concrete layer 50
However, the overlapping portion of the floor dovetail sheet 40 and the end dovetail sheet 20 is pressed down, or the end dovetail sheet 20 is bundled with the foundation 6
Since it is pressed against the side surface of No. 0, the same function as that of the above-mentioned termite prevention structure of FIG. 1 is exerted.

[Opening of Fabric Foundation] As shown in FIG. 6, the fabric foundation 10 may be provided with an opening 11 that is partially cut away for ventilation. In this case as well, the basic termite-proof structure may be the same as that of the above-mentioned embodiment. The adhesive layer 30 is applied along the lower edge of the opening 11 at a position crossing the opening 11. If the adhesive is extruded from a tube-containing container or the like and applied, such a bent linear coating can be easily performed. Edge termite prevention sheet 20
Has a recess formed at a location corresponding to the opening 11.
When the strip-shaped end-terminated sheet 20 prepared in advance is attached to the opening 11, the recess may be cut out with a cutter knife or the like.

Construction of the floor dovetail preventive sheet 40 may be the same as that of the above-mentioned embodiment. As shown in FIG. 7, the soil concrete layer 50 is placed up to a position higher than the lower end of the opening 11. As a result, on both sides of the opening 11, the end dovetail sheet 20 is provided at a position higher than the soil concrete layer 50.
And the upper end of the adhesive layer 30 is disposed, but the opening 11
At this point, the end-terminated sheet 20 and the adhesive layer 30 are completely embedded under the soil concrete layer 50. In this way, even if the end part ant-proof sheet 20 and the adhesive layer 30 are embedded in the soil concrete layer 50, the ant-proof function can be exhibited well.

[0036]

INDUSTRIAL APPLICABILITY The termite-proof structure for buildings and the termite-preventing method according to the present invention provide a bottom termite-proof sheet for covering a ground surface in an underfloor space, and a foundation structure with a cover joint from a side surface of the foundation structure to a ground surface. By stacking the end-terminated anti-termite sheets to be joined on the ground surface and placing the soil concrete layer on it, termites intrude from the ground side to the underfloor space side or the upper part of the foundation structure. It is possible to prevent it from coming. Especially, since the weight of soil concrete is used to press down the floor dovetail sheet and the edge dovetail sheet,
The anti-termite function at both joints is significantly improved.

Furthermore, the soil concrete sometimes contracts, deforms, or cracks after the construction. Even in such a case, the floor dovetail sheet and the end dovetail sheet are used to prevent the dovetail. It is possible to exert a good termite-preventing effect for a long period of time without deteriorating the function.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an under-floor anti-termite structure showing an embodiment of the present invention.

FIG. 2 is a perspective sectional view.

[Fig. 3] A perspective view of the soil-proof structure of the bundle foundation before placing concrete in the soil

FIG. 4 is a partial perspective view showing a superposed portion of the end dovetail sheets.

FIG. 5 is a partially cutaway perspective view of a completed state.

FIG. 6 is a perspective cross-sectional view of a cloth foundation opening with an anti-termite structure before placing concrete in soil.

FIG. 7 is a perspective sectional view of a completed state.

[Explanation of symbols]

10 cloth foundation 11 openings 20 Edge termite sheet 30 Adhesive layer (joint part) 40 floor ant sheet 50 soil concrete layers 60 bundle basis E ground U Underfloor space

Continued front page    (72) Inventor Yoshihiko Ikeda             1-4-1, Shinsenri Nishimachi, Toyonaka City, Osaka Prefecture             National Housing Industry Co., Ltd. (72) Inventor Nobuaki Matsueda             1-4-1, Shinsenri Nishimachi, Toyonaka City, Osaka Prefecture             National Housing Industry Co., Ltd. (72) Inventor Hasegawa             Fukubibi, 1-23-3 Oi, Shinagawa-ku, Tokyo             Rufukubi Chemical Industry Co., Ltd. (72) Inventor Kunihiko Yamauchi             Fukubi Building, 17-12 Eki-cho, Suita City, Osaka Prefecture               Fukubi Chemical Industry Co., Ltd. (72) Inventor Kiyoshi Akita             Fukui, Fukui Prefecture             Within Bi Kagaku Kogyo Co., Ltd. F-term (reference) 2E001 DH14 FA21 FA22 GA24 GA59                       HA04 HB01 HD11 LA04 LA12

Claims (5)

[Claims] 1. A termite-proof structure in an underfloor space of a building, comprising a bottom termite-preventing sheet for covering the ground surface of the underfloor space, and a side surface of the foundation structure of the underfloor space covering the ground surface. An end dovetail sheet that is overlaid with the bottom dovetail sheet, a joint that joins the end dovetail sheet to the foundation structure, a portion of the end dovetail sheet that covers the ground surface, and a bottom dovetail sheet An anti-termite structure that includes an earthen concrete layer that is placed over the ground. 2. The dovetail preventive structure according to claim 1, wherein the end part dovetail preventive sheet is stacked below the bottom face dovetail preventive sheet on the ground surface. 3. The termite proof structure according to claim 1, wherein the joint portion is a coating layer of an adhesive containing a termite proof agent. 4. The termite-proof structure according to claim 1, wherein the end-terminated sheet and / or the bottom-terminated termite sheet is made of a sheet material containing a termite-preventing agent. 5. An anti-termite construction method for an underfloor space of a building, wherein a step of applying an adhesive compounded with an anti-termite agent continuously along a horizontal direction on a side surface of a foundation structure of the underfloor space. (a)
And a step (b) of covering the side surface of the foundation structure of the underfloor space with an end dovetail sheet over the ground surface, and joining the end dovetail sheet to the foundation structure with the adhesive (b), and the ground surface of the underfloor space. A step (c) of covering and laying a bottom anti-termite sheet so as to overlap the end termite sheet, and covering a part of the edge termite sheet covering the ground surface and the bottom termite sheet to form a soil concrete layer. Placing process
(d) A termite control method including and.