JP2021120527A - Foundation structure, and construction method of foundation structure - Google Patents

Abstract

To provide a foundation structure capable of preventing termites from entering inside a heat insulation material.SOLUTION: A foundation structure 10 includes a mat foundation 11 having a rising portion 13. The rising portion 13 includes a first through hole 18 through which a pipe 60 passes. A heat insulation material 15 is disposed so as to be in contact with an outer wall face 17 of the rising portion 13. The heat insulation material 15 has a rectangular plate shape and has a termite prevention property on a surface. The heat insulation material 15 includes a second through hole 43 communicating with the first through hole 18. In the second through hole 43, a fiber assembly 70 is disposed. The pipe 60 is disposed inside the fiber assembly 70. The pipe 60 has a cylindrical shape and includes a notch along an axial line. A worker deflects the pipe 60 and inserts the pipe 60 into the second through hole 43. The pipe 60 returning to an original cylindrical shape due to elasticity presses the fiber assembly 70 to a peripheral face of the second through hole 43.SELECTED DRAWING: Figure 3

Description

The present invention relates to a foundation structure provided with heat insulating material and piping.

Patent Document 1 discloses a foundation structure including a foundation, a rectangular plate-shaped heat insulating material installed adjacent to the foundation, and an anti-termite sheet attached to the heat insulating material. The anti-termite sheet is attached to the heat insulating material so as to cover the bottom surface and the top surface of the heat insulating material and one main surface.

In order to arrange pipes such as water supply pipes and pipes through which cables and the like pass through the foundation structure, through holes may be provided at the rise of the foundation. In that case, a through hole communicating with the through hole is provided in the heat insulating material. The pipe is inserted through the through hole.

Patent Document 2 discloses a basic structure in which a pipe is covered with a fiber aggregate (for example, glass wool).

Japanese Unexamined Patent Publication No. 2004-124705 Japanese Unexamined Patent Publication No. 2019-44554

Using the technique described in Patent Document 2, it is conceivable to fill the gap between the pipe and the rising surface of the foundation or the peripheral surface of the through hole provided in the heat insulating material with the fiber aggregate. However, it is conceivable that the fiber aggregates do not completely adhere to the peripheral surface of the through holes of the heat insulating material simply by filling the fiber aggregates. Even if the fiber aggregate is not completely adhered to the peripheral surface of the through hole of the heat insulating material, it is possible to prevent termites from invading the inside of the foundation structure through the gap. However, termites cannot be prevented from invading the inside of the heat insulating material. When the heat insulating material is made of foamed resin or the like, termites that have invaded the inside of the heat insulating material devour the heat insulating material.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a technique capable of preventing termites from invading the inside of a heat insulating material.

(1) The foundation structure according to the present invention has a rising edge, and is plate-shaped with a foundation provided with a first through hole in the rising edge, and the main surface is in contact with the rising wall surface. A heat insulating material provided with a circular second through hole communicating with the first through hole, a fiber aggregate arranged in contact with the peripheral surface of the second through hole of the heat insulating material, and the above. It is provided inside the fiber aggregate in the second through hole, and includes a pressing member that presses the fiber aggregate against the peripheral surface of the second through hole.

The fiber aggregate has anti-termite properties depending on the fibers contained therein. The fiber aggregate pressed against the peripheral surface of the second through hole by the pressing member prevents termites from invading the inside of the heat insulating material from the peripheral surface.

(2) The pressing member is a cylindrical pipe material having a notch along the axis, and is a pipe having an urging force in the radial direction.

The pipe with the notch is placed inside the fiber assembly after being bent so that one end face in the circumferential direction is inside the other end face. The bent pipe presses the fiber aggregate in the radial direction and presses the fiber aggregate against the peripheral surface of the second through hole.

(3) The basic structure of the present invention is inserted through the first through hole and the second through hole, and may further include a pipe located inside the fiber assembly. The pressing member is a spring material that is located between the fiber assembly and the pipe and has an urging force that presses the fiber assembly against the peripheral surface of the second through hole with the pipe as a fulcrum. ..

The pressing member presses the fiber aggregate against the peripheral surface of the second through hole with the pipe as a fulcrum, and presses the fiber aggregate against the peripheral surface.

(4) The basic structure of the present invention is inserted through the first through hole and the second through hole, and may further include a pipe located inside the fiber assembly. The pressing member is made of a shape memory alloy and is located between the fiber assembly and the pipe.

The pressing member made of a shape memory alloy is placed inside the fiber assembly after being heated or cooled, and then deforms at room temperature to press the fiber assembly against the peripheral surface of the second through hole. ..

(5) In the method of constructing the foundation structure of the present invention, a first step of placing a foundation having a rise having a first through hole and a plate-shaped heat insulating material having a circular second through hole are used. The second step of arranging the main surface in contact with the rising wall surface and superimposing the opening of the second through hole on the opening of the first through hole, and penetrating the first through hole and the second through hole. A third step of installing the fiber assembly and the pressing member is provided. The pressing member is located inside the fiber assembly and presses the fiber assembly against the peripheral surface of the second through hole.

The present invention can also be regarded as a method of constructing a foundation structure.

(6) The pressing member is a cylindrical pipe having a notch along the axis, and the third step may include a step of bending the pressing member and inserting it into the second through hole.

(7) The third step may be a step of penetrating the first through hole and the second through hole to install the pipe, the fiber aggregate, and the pressing member. The pressing member is located between the pipe and the fiber aggregate, and is a spring material having an urging force that presses the fiber aggregate against the peripheral surface of the second through hole with the pipe as a fulcrum. It is a member made of shape memory alloy.

The basic structure according to the present invention can prevent termites from invading the inside of the heat insulating material from the peripheral surface of the second through hole formed in the heat insulating material.

FIG. 1 is a perspective view of a part of the foundation structure 10. FIG. 2 is an explanatory diagram illustrating a process of placing the cloth foundation 11. FIG. 3 is a vertical cross-sectional view of the foundation structure 10. FIG. 4 is an explanatory diagram illustrating the construction of the foundation structure 10. FIG. 5 is an explanatory diagram illustrating a step of inserting the pipe 60 into the second through hole 43 of the heat insulating material 15. FIG. 6 is a cross-sectional view of the heat insulating material 15 according to the modified example.

Hereinafter, embodiments of the present invention will be described. It goes without saying that the embodiments described below are merely examples of the present invention, and the embodiments of the present invention can be appropriately changed without changing the gist of the present invention.

FIG. 1 is a perspective view of a part of the foundation structure 10 that supports the building frame (not shown). The foundation structure 10 includes a cloth foundation 11, a heat insulating material 15 attached to the cloth foundation 11, a pipe 60, and a fiber assembly 70 (FIG. 3).

The cloth foundation 11 includes a footing 12, a rise 13, and a plurality of anchor bolts 14. The footing 12 is buried underground. The rising edge 13 projects upward from the footing 12. That is, the rising edge 13 projects upward from the ground.

The rising edge 13 of the cloth foundation 11 has a first through hole 18. The first through hole 18 has a circular opening shape and penetrates the rise 13 in the thickness direction of the rise 13. The first through hole 18 is formed by a sleeve 19 (FIG. 3) embedded in the rising edge 13. A gas pipe, a water supply pipe, a cable, or the like is inserted into the first through hole 18 (sleeve 19).

The anchor bolt 14 has a buried portion (not shown) embedded in the rising portion 13 and a bolt portion protruding upward from the buried portion. As shown in FIG. 1, in the placed cloth foundation 11, only the bolt portion of the anchor bolt 14 is visible. In the example shown in FIG. 1, one anchor bolt 14 has two bolt portions.

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

The base 16 (FIG. 3) is placed on the upper surface of the rise 13. The base 16 has an insertion hole through which the bolt portion of the anchor bolt 14 is inserted. The base 16 is fixed to the cloth foundation 11 by fastening a nut (not shown) to the bolt portion inserted into the insertion hole. A plurality of pillars (not shown) are placed on the upper surface of the base 16 and fixed to the base 16 using fasteners (not shown) such as bolts and nuts. The columns and the base 16 form the frame of the building.

For the cloth foundation 11, for example, as shown in FIG. 2, after laying crushed stone (not shown) in the groove 51 provided on the ground, the waste concrete 52 is placed, and then the formwork 53 is installed along the groove 51. At the same time, the reinforcing bars (not shown) and the sleeve 19 (FIG. 3) are installed while being held by the formwork 53, and the anchor bolts 14 are installed using the support plate 54, and then the ready-mixed concrete is poured into the formwork 53. It is driven by. The step of placing the cloth foundation 11 is an example of the first step.

The heat insulating material 15 has a rectangular plate shape, and as shown in FIG. 3, a pair of main surfaces 21 and 22 parallel to each other, a top surface 23 and a bottom surface 24 parallel to each other, and a pair of side surfaces parallel to each other. Has. The heat insulating material 15 is made of a foamed resin formed by foaming a resin such as urethane foam, extruded polystyrene foam, beaded polystyrene foam, polyethylene foam, or phenol foam.

The thickness of the heat insulating material 15 is, for example, in the range of 30 mm to 160 mm. The width of the heat insulating material 15 is in the range of about 50 mm to 2000 mm. The height of the heat insulating material 15 is set to be in the range of about 300 mm to 2000 mm according to the height of the rising edge 13 of the cloth foundation 11.

The heat insulating material 15 has anti-termite properties on the surface by coating the surface or the like. For example, by attaching an anti-termite sheet to the surface of the heat insulating material 15, anti-termite properties are imparted to the surface of the heat insulating material 15.

The heat insulating material 15 is arranged so that one of the pair of main surfaces 21 and 22 (the main surface 22 in the illustrated example) is in contact with the outer wall surface 17 of the rising 13 of the cloth foundation 11. The heat insulating material 15 is attached to the outer wall surface 17 of the rising portion 13 of the cloth foundation 11 by using, for example, a silicon-based adhesive.

The heat insulating material 15 has a second through hole 43 into which the pipe 60 is inserted. The second through hole 43 has a circular opening shape and penetrates the heat insulating material 15 in a direction along the thickness of the heat insulating material 15. The diameter of the second through hole 43 is made larger than the outer diameter of the pipe 60 so that the pipe 60 and the fiber assembly 70 can be arranged in the second through hole 43.

The second through hole 43 may be provided in the heat insulating material 15 at the factory according to the construction drawing of the foundation structure 10, or may be provided in the heat insulating material 15 by an operator at the work site where the foundation structure 10 is constructed. You may. The operator provides the heat insulating material 15 with the second through hole 43 by using an instrument such as a drill or a hole saw.

The pipe 60 shown in FIG. 1 has a cylindrical shape. Further, the pipe 60 has a notch 61 along the axis. The notch 61 is provided from one end to the other end of the pipe 60 in the direction along the axis. Further, the pipe 60 is a resin molded product and has elasticity. The pipe 60 is elastically deformed by being pressed in the radial direction by the operator, as shown in FIG. 5 (B). The pipe 60 is bent by an operator during the construction of the foundation structure 10. That is, the bent pipe 60 has an urging force in the radial direction. The pipe 60 is an example of a pressing member.

The fiber aggregate 70 refers to a relatively flexible mass formed by a collection of elongated filamentous fibers. As the material constituting the fiber aggregate 70, organic fibers such as cotton, linen, polyamide, polyester and acrylic, and inorganic fibers such as glass fiber, rock wool and slug fiber can be used, but the fiber aggregate 70 Is preferably an inorganic fiber aggregate formed by gathering inorganic fibers, and more preferably, the fiber aggregate 70 is glass wool or rock wool. As a result, the heat resistance and corrosion resistance of the fiber assembly 70 can be improved.

The fiber aggregate 70 is arranged outside the pipe 60 in the first through hole 18 included in the rise 13 of the cloth foundation 11 and in the second through hole 43 included in the heat insulating material 15. That is, the fiber assembly 70 is located between the peripheral surface of the second through hole 43 and the outer peripheral surface of the pipe 60. The fiber aggregate 70 is pressed by the elasticity of the pipe 60 over the entire peripheral surface of the second through hole 43 of the heat insulating material 15. That is, the fiber aggregate 70 is in close contact with the entire peripheral surface of the second through hole 43 of the heat insulating material 15. The fiber aggregate 70 prevents termites from invading the heat insulating material 15 from the peripheral surface of the second through hole 43.

The construction of the foundation structure 10 will be described below. First, the worker places the cloth foundation 11 as described above. Then, the worker backfills the footing 12 of the cloth foundation 11 and the lower part of the rise 13 until they are located in the ground.

Next, as shown in FIG. 4A, the operator digs a groove 55 along the rise 13 on the outer wall surface 17 side of the rise 13 of the cloth foundation 11. In the case of the one-piece cloth foundation, since the groove 55 is formed when the formwork is removed from the rising portion, it is not necessary to provide the groove 55 again. Then, the worker strikes a black line indicating the upper end of the heat insulating material 15 on the outer wall surface 17 of the rising edge 13 to perform leveling. Next, the operator provides the heat insulating material 15 with a second through hole 43. The step of providing the second through hole 43 in the heat insulating material 15 may be performed in a factory or the like prior to the construction of the foundation structure 10. The operator adheres a plurality of heat insulating materials 15 adjacent to each other to the rising edge 13 of the cloth foundation 11 in accordance with the above-mentioned black lines, and then backfills the groove 55 so that the upper portion of the heat insulating material 15 is exposed from the ground (FIG. FIG. 4 (B)). At that time, the operator arranges the heat insulating material 15 so that the opening of the first through hole 18 of the rising portion 13 of the cloth foundation 11 and the opening of the second through hole 43 of the heat insulating material 15 coincide with each other. The step of arranging the heat insulating material 15 in contact with the rising edge 13 of the cloth foundation 11 is an example of the second step.

Next, the operator arranges the tubular fiber aggregate 70 in the second through hole 43 of the heat insulating material 15 (FIG. 4 (C)). Then, the operator releases the bent pipe 60 from the pipe 60 after inserting the bent pipe 60 into the first through hole 18 and the second through hole 43 as shown in FIG. 5 (B) (FIG. 5 (C)). .. The bent pipe 60 returns to its original tubular shape due to elastic force (FIG. 5 (D)). The pipe 60, which has returned to its original shape, presses the fiber aggregate 70 over the entire peripheral surface of the first through hole 18 and the entire peripheral surface of the second through hole 18. That is, in the pipe 60, the fiber aggregate 70 is brought into close contact with the entire peripheral surface of the second through hole (FIG. 4 (D)). Then, the worker passes a gas pipe, a water supply pipe, a cable, or the like through the pipe 60. The step in which the operator inserts the fiber assembly 70 and the pipe 60 into the second through hole 43 is an example of the third step.

[Action and effect of the embodiment]
In the present embodiment, the surface of the heat insulating material 15 has anti-termite properties. Therefore, termites are prevented from invading the inside of the heat insulating material 15.

Further, in the present embodiment, the fiber assembly 70 is brought into close contact with the peripheral surface of the second through hole 43 of the heat insulating material 15 by utilizing the elasticity of the pipe 60 that protects the cable. Therefore, a member such as a spring material that brings the fiber assembly 70 into close contact with the peripheral surface of the second through hole 43 becomes unnecessary. As a result, the number of parts required for the construction of the foundation structure 10 is reduced.

[Modification 1]
In the above-described embodiment, an example in which the fiber assembly 70 is pressed against the inner peripheral surface of the second through hole 43 of the heat insulating material 15 by using the pipe 60 has been described. In this modification, the fiber assembly 70 is pressed against the inner peripheral surface of the second through hole 43 by using the pressing member 63.

In this modification, the pipe 62 is inserted into the second through hole 43 of the heat insulating material 15 instead of the pipe 60. The pipe 62 is a water supply pipe, a gas pipe, or the like. The pipe 62 is made of resin or metal, and has a tubular shape.

Since the notch 61 cannot be provided in the water supply pipe or the gas pipe 62, the fiber assembly 70 is pressed against the peripheral surface of the second through hole 43 of the heat insulating material 15 as shown in FIG. 6 (A). The pressing member 63 is arranged between the pipe 62 and the fiber assembly 70.

The pressing member 63 is a spring material such as a leaf spring. However, the pressing member 63 may be another type of spring material as long as the fiber assembly 70 can be pressed against the peripheral surface of the second through hole 43 of the heat insulating material 15. Hereinafter, an example in which the pressing member 63 is a leaf spring will be described.

A plurality of pressing members 63 are arranged at equal intervals in the circumferential direction of the pipe 62. In the illustrated example, four pressing members 63 are arranged at 90 ° intervals. One end of the pressing member 63 is in contact with the pipe 62. The other end of the pressing member 63 is in contact with the fiber assembly 70. The pressing member 63 presses the fiber assembly 70 against the peripheral surface of the second through hole 43 with the pipe 62 as a fulcrum.

The construction of the fiber assembly 70, the pressing member 63, and the pipe 62 will be described. The operator winds the fiber assembly 70 around the pipe 62 to which the pressing member 63 is attached. The operator press-fits the pipe 62 around which the fiber assembly 70 is wound into the second through hole 43 while elastically deforming the pressing member 63. The elastically deformed pressing member 63 presses the fiber assembly 70 against the peripheral surface of the second through hole 43.

Also in this modification, termites are prevented from entering the inside of the heat insulating material 15 from the peripheral surface of the second through hole 43 of the heat insulating material 15.

[Modification 2]
In the above-mentioned modification 1, an example in which the pipe 60 or the pressing member 63 is used as the member for pressing the fiber assembly 70 has been described. In this modification, an example in which a pressing member 64 (FIG. 6B) made of a shape memory alloy is used as a member for pressing the fiber assembly 70 will be described.

The pressing member 64 has a cylindrical shape. The pressing member 64 has a notch 65 along the axis. The pressing member 64 made of a shape memory alloy has a shape similar to that of the pipe 60 shown in FIG. 5B, for example, by being heated or cooled and being subjected to a load. The operator winds the heat insulating material 15 around the pressing member 64 having the shape shown in FIG. 5 (B). The operator arranges the pressing member 64 around which the heat insulating material 15 is wound in the second through hole 43 of the heat insulating material 15. Next, the operator inserts the pipe 62 into the inside of the pressing member 64. The pipe 62 may be a water supply pipe or a protective pipe such as a cable.

When the pressing member 64 reaches room temperature, it returns to the tubular shape shown in FIG. 6B and presses the fiber assembly 70 against the peripheral surface of the second through hole 43.

Also in this modification, termites are prevented from entering the inside of the heat insulating material 15 from the peripheral surface of the second through hole 43 of the heat insulating material 15.

[Other variants]
In the above-described embodiment, an example in which the fiber assembly 70 is arranged in the second through hole 43 of the heat insulating material 15 and then the pipe 60 is inserted into the second through hole 43 has been described. However, the fiber assembly 70 may be wound around the pipe 60, and the pipe 60 around which the fiber assembly 70 is wound may be inserted into the second through hole 43.

Further, in the above-described embodiment, an example in which the heat insulating material 15 has anti-termite properties on the surface has been described. However, the heat insulating material 15 does not have to have anti-termite properties on the side surface. In that case, by arranging the fiber aggregate 70 between the adjacent heat insulating materials 15, termites are prevented from invading the inside from the side surface of the heat insulating material 15 and eating the heat insulating material 15.

Further, in the above-described embodiment, an example in which the heat insulating material 15 is arranged in contact with the outer wall surface 17 of the rising portion 13 of the cloth foundation 11 has been described. However, the heat insulating material 15 may be arranged in contact with the inner wall surface of the rising edge 13.

Further, in the above-described embodiment, an example in which the fiber assembly 70 and the pipe 60 are inserted only into the second through hole 43 of the heat insulating material 15 has been described. However, the fiber assembly 70 and the pipe 60 may be inserted into the first through hole 18 of the rise 13 of the cloth foundation 11 in addition to the second through hole 43 of the heat insulating material 15.

10 ... Foundation structure 11 ... Cloth foundation 13 ... Rise 15 ... Insulation material 18 ... First through hole 43 ... Second through hole 60 ... Piping 61 ... Notch 62 ... Piping 63 ... Pressing member (spring material)
64 ... Pressing member (shape memory alloy)
70 ... Fiber aggregate

Claims (7)

A foundation that has a rise and has a first through hole in the rise,
A heat insulating material that is plate-shaped and has a main surface in contact with the rising wall surface and is provided with a circular second through hole that communicates with the first through hole.
A fiber aggregate arranged in contact with the peripheral surface of the second through hole of the heat insulating material, and
A basic structure including a pressing member arranged inside the fiber aggregate in the second through hole and pressing the fiber aggregate against the peripheral surface of the second through hole. The basic structure according to claim 1, wherein the pressing member is a cylindrical pipe material having a notch along an axis and a pipe having an urging force in the radial direction. It is inserted through the first through hole and the second through hole, and further includes a pipe located inside the fiber assembly.
The pressing member is a spring material that is located between the fiber assembly and the pipe and has an urging force that presses the fiber assembly against the peripheral surface of the second through hole with the pipe as a fulcrum. , The basic structure according to claim 1. It is inserted through the first through hole and the second through hole, and further includes a pipe located inside the fiber assembly.
The basic structure according to claim 1, wherein the pressing member is made of a shape memory alloy and is located between the fiber assembly and the pipe. The first step of placing a foundation having a rise having a first through hole, and
A second plate-shaped heat insulating material having a circular second through hole is arranged so that the main surface abuts on the rising wall surface and the opening of the second through hole is overlapped with the opening of the first through hole. Process and
It is provided with a third step of penetrating the first through hole and the second through hole to install a fiber assembly and a pressing member.
A method for constructing a foundation structure, wherein the pressing member is located inside the fiber assembly and is a member that presses the fiber assembly against the peripheral surface of the second through hole. The pressing member is a cylindrical pipe having a notch along the axis.
The method for constructing a foundation structure according to claim 5, wherein the third step includes a step of bending the pressing member and inserting the pressing member into the second through hole. The third step is a step of penetrating the first through hole and the second through hole to install the pipe, the fiber aggregate, and the pressing member.
The pressing member is located between the pipe and the fiber aggregate, and is a spring material having an urging force that presses the fiber aggregate against the peripheral surface of the second through hole with the pipe as a fulcrum. The method for constructing a basic structure according to claim 5, which is a member made of a shape memory alloy.

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