JP7602245B2 - Structure, foundation, method for manufacturing foundation, and method for manufacturing building - Google Patents

Description

The present invention relates to a structure, a foundation, a method for manufacturing a foundation, and a method for manufacturing a building.

Patent Document 1 discloses a geothermal heat exchanger that is buried underground and used, which includes a supply pipe for flowing circulating water from the pile head side to the pile tip side of a steel pipe pile, a return pipe for flowing the circulating water that has reached the pile tip side through the supply pipe from the pile tip side to the pile head side, and a circulating water piping consisting of a folded section that connects the supply pipe and the return pipe deep underground, and a pile head cap that separates the pile head side section of the return pipe from the pile head side section of the supply pipe.

JP 2013-253743 A

Incidentally, in order to utilize underground heat for air conditioning or the like, piles through which a heat-exchanging fluid flows are sometimes buried in the ground, and the foundations of a building are provided on these piles.
Therefore, an object of the present invention is to easily form a foundation structure for a building using piles through which a fluid that exchanges heat flows.

For this purpose, the technology disclosed in this specification is a structure that supports the foundation of a building and is attached to a pile inside which is arranged a guide pipe through which a fluid that performs heat exchange flows, the structure being a hollow member with an open upper end and lower end, the structure being equipped with a main body into whose lower end the pile is inserted, and a cover part that is arranged at the upper end of the main body, covers the upper end, and faces the foundation, the main body part having a notch that is recessed from the upper end toward the lower end, the cover part having a protrusion on an opposing surface that faces the upper end of the main body part, the protrusion being arranged within the notch, and an opening through which the guide pipe passes is formed between the tip of the protrusion and the bottom of the notch.

Here, the cover portion may have a central protrusion that protrudes from the opposing surface at a position on the central side of the projection on the opposing surface.
In addition, the central protrusion may be positioned so as to protrude from the upper end of the main body portion toward the inside of the main body portion, and may be formed with dimensions that allow the central protrusion to move when protruding into the inside of the main body portion.
In addition, the tip of the protrusion may have a protrusion curved surface which is a curved surface concave in a direction away from the bottom of the notch, and the bottom of the notch may have a notch curved surface which is a curved surface concave in a direction away from the tip of the protrusion.
The main body portion may be cylindrical and may have a tapered portion where the outer diameter of the main body portion decreases from the lower end side toward the upper end side.
The main body and the cover may be made of casting.

From another perspective, the technology disclosed in this specification is a foundation structure comprising a guide pipe through which a fluid that performs heat exchange flows, a pile with the guide pipe disposed therein, a structure attached to the pile, and a foundation for a building supported by the structure, the structure being a cylindrical member with an open upper end and lower end, a main body into whose lower end the pile is inserted, and a cover part which is a disk-shaped member provided at the upper end of the main body and covers the upper end, and which faces the foundation, the main body having a notch recessed from the upper end toward the lower end, the cover part being a protruding part provided in the center of an opposing surface that faces the upper end of the main body. a claw portion provided on the opposing surface outside the protrusion, the claw portion is disposed within the notch, an opening through which the guide pipe passes is formed between the tip of the claw portion and the bottom of the notch, the tip of the claw portion has a claw portion curved surface that is a curved surface recessed in a direction away from the bottom of the notch, the bottom of the notch has a notch curved surface that is a curved surface recessed in a direction away from the tip of the claw portion, the protrusion is disposed protruding from the upper end of the main body portion into the inside of the main body portion, and is formed with dimensions that allow the protrusion to move while protruding into the inside of the main body portion.

From another perspective, the technology disclosed in this specification is a structure that is attached to a pile inside which a guide pipe through which a fluid that performs heat exchange flows is disposed, and that supports the foundation of a building, the structure being a hollow member with an open upper end and lower end, the structure comprising a main body into whose lower end the pile is inserted, and a cover part that is provided at the upper end of the main body, covers the upper end, and faces the foundation, the main body part having a notch that is recessed from the upper end toward the lower end, the cover part having a protrusion on an opposing surface that faces the upper end of the main body part, and the protrusion The method for manufacturing a foundation for a building is to use a structure in which a protrusion is placed in the notch and an opening through which the guide pipe passes is formed between the tip of the protrusion and the bottom of the notch, and includes the steps of setting the pile in the ground, setting the main body on the pile, placing the guide pipe inside the pile, covering the upper end of the main body with the cover, sealing the opening through which the guide pipe protrudes, and placing the foundation above the cover.

From another perspective, the technology disclosed in this specification is a method for manufacturing a building using a structure that supports the foundation of a building and is provided on a pile inside which is provided with a guide pipe through which a fluid that performs heat exchange flows, the structure being a hollow member with an open upper end and lower end, a main body into which the pile is inserted, and a cover part that is provided on the upper end of the main body and covers the upper end and faces the foundation, and an opening through which the guide pipe passes is formed between the main body and the cover part, the method for manufacturing a building including the steps of: setting the pile in the ground; setting the main body on the pile; placing the guide pipe inside the pile; covering the upper end of the main body with the cover part; sealing the opening through which the guide pipe protrudes; placing the foundation above the cover part; and placing the main body of the building above the foundation.

The technology disclosed in this specification makes it possible to easily form a foundation structure for a building using piles through which a fluid that exchanges heat flows.

1 is a diagram showing a schematic configuration of a building according to an embodiment of the present invention; FIG. 2 is a diagram showing a schematic configuration of a reinforcing body. FIG. 2 is a diagram for explaining components of a joint body. FIG. 13 is a diagram for explaining the function of the bonded body. FIG. 1 is a diagram illustrating a method for constructing a building.

Hereinafter, one embodiment of a building of the present invention will be described with reference to the drawings.
<Building 1>
FIG. 1 is a diagram showing a schematic configuration of a building 1 according to the present embodiment.
First, with reference to FIG. 1, a schematic configuration of a building 1 to which the present embodiment is applied will be described.

1(a), the building 1 has a building body 10 which is the main body of the building, a foundation body 30 which supports the building body 10, and a reinforcing body 50 which supports the foundation body 30. The building 1 is exemplified as a so-called small-scale building which satisfies requirements such as a foundation of three stories or less, but is not particularly limited thereto.
Here, the building body 10 has an outdoor unit 15 and an indoor unit 17 that constitute the air conditioning equipment inside the building 1 .
1(b), the reinforcing body 50 supporting the foundation body 30 is provided with a connector 100 (described in detail later). More specifically, each of the plurality of piles 70 constituting the reinforcing body 50 is provided with a connector 100.

<Reinforcing body 50>
FIG. 2 is a diagram showing a schematic configuration of the reinforcing member 50. As shown in FIG.
Next, a schematic configuration of the reinforcing member 50 will be described with reference to FIG.
As shown in FIG. 2 , the reinforcing body 50 includes a pile 70 at least partially buried in the ground, a guide pipe 90 provided inside the pile 70 , and a connector 100 provided on the upper side of the pile 70 .

Pile 70 is a generally cylindrical member with an internal space. The lower end of pile 70 is closed, while the upper end is open. Pile 70 is formed of a well-known structure such as a steel pipe pile, a concrete pile, or a soil cement composite pile that integrates a soil cement column and a steel pipe pile, which are used for the foundation of building 1 (see FIG. 1). Pile 70 is formed, for example, from a general structural carbon steel pipe. Pile 70 is formed, for example, with an outer diameter of 80 mm to 200 mm. Pile 70 is also structured to transmit mainly compressive forces under the earthen floor slab.

The guide pipe 90 is a pipe through which a heat medium for heat exchange flows. The guide pipe 90 is connected to an outdoor unit 15 (see FIG. 1(a)) provided in the building body 10. The illustrated guide pipe 90 has an inner pipe 91 made of metal such as copper, stainless steel, or aluminum, and an outer pipe 93 made of resin such as polyethylene resin that covers the outer periphery of the inner pipe 91. This outer pipe 93 has the function of protecting and insulating the inner pipe 91.

The guide pipe 90 also has an outgoing pipe 95 for flowing the heat medium from the building 1 side, in other words, the outdoor unit 15 side, toward the inside of the pile 70, a return pipe 97 which is a pipe for returning the heat medium from inside the pile 70 to the outdoor unit 15 side, and a folded section (not shown) that connects the outgoing pipe 95 and the return pipe 97 inside the pile 70. In other words, the illustrated guide pipe 90 has an end of the outgoing pipe 95 and an end of the return pipe 97 connected near the lower end of the pile 70, and the folded section which is the connection section is, for example, folded back in a roughly U-shape.

The pile 70 is provided with a filler inside to fill the space between the inner surface of the pile 70 and the outer surface of the guide tube 90. This filler is made of a liquid such as water, oil, or antifreeze. The filler may also be a solid such as sand, gravel, crushed lightweight aerated concrete, or a metal body. The heat transfer medium passing through the guide tube 90 is made of a fluid such as water, oil, antifreeze, or air.

The heat medium passing through the inside of the guide pipe 90 flows into the inside of the pile 70 from the outgoing pipe 95 side, as shown by the arrow in FIG. 2, and flows out of the return pipe 97 through the turn-back section (not shown). Here, the heat medium passing through the inside of the pile 70 changes its temperature by exchanging heat with the filler and the pile 70 inside the pile 70. The heat medium with the changed temperature then flows to the outdoor unit 15, and the outdoor unit 15 and the indoor unit 17 adjust the temperature inside the building 1. In other words, by exchanging heat between the ground and above ground via the heat medium, geothermal heat is used for air conditioning, etc.

The joint 100 is provided in a position that covers the upper end 71 of the pile 70. That is, the joint 100 functions as a cap for the pile 70. The joint 100 also has a flat upper surface, i.e., a lid upper surface 112 described below, on which the base body 30 is provided. That is, the joint 100 is provided opposite the base body 30, and is a member that supports the base body 30.

The joint body 100 also has an opening 190 on the side of the joint body 100 that connects the inside and outside of the joint body 100. Through this opening 190, the guide pipe 90 provided inside the pile 70 protrudes outward. In addition, in the process of attaching the joint body 100 to the pile 70, after the guide pipe 90 is positioned so that it passes through the opening 190, the opening 190 is sealed with a sealing member 195 (see FIG. 5(e) described later).

In the following description, the up-down direction of the reinforcing member 50 shown in FIG. 2 may be referred to simply as the up-down direction.

<Joint body 100>
FIG. 3 is a diagram for explaining components of the joined body 100. As shown in FIG.
Next, a schematic configuration of the bonded body 100 will be described with reference to FIG.
As shown in Fig. 3(a), the joined body 100 has a cover 110 and a main body 150 covered by the cover 110. Here, the cover 110 and the main body 150 are each configured as separate independent members. The joined body 100 shown in the figure is a casting formed by casting, but the manufacturing method is not particularly limited as long as it can support the base body 30. In addition, the joined body 100 is formed, for example, from a cast steel product for a welded structure. Furthermore, the joined body 100 is formed, for example, with an outer diameter of 80 mm to 200 mm.

The lid body 110 has a generally disk-shaped lid main body 111. The lid main body 111 has a lid upper surface 112 and a lid lower surface 113. The lid lower surface 113 has a protruding portion 114 that protrudes downward from the center of the lid lower surface 113, and a claw portion 115 that protrudes downward from the outer periphery of the lid lower surface 113. Here, the claw portion 115 protrudes downward beyond the protruding portion 114. The claw portion 115 also has a claw curved surface 117 that is a curved surface that is concave toward the upper side at the claw lower end 116, which is the lower end, and a claw side surface 119 that is a surface that runs along the vertical direction of the side of the claw portion 115.

The main body 150 is a generally cylindrical member. More specifically, the main body 150 is a hollow member with a generally annular cross section, with both ends in the vertical direction open. The main body 150 has an upper main body end 151 and a lower main body end 153.

The main body 150 has a main body notch 155, which is a notch that is recessed downward, at the main body upper end 151. Here, the main body notch 155 has a notch curved surface 157, which is a curved surface that is recessed downward at the bottom of the main body notch 155, i.e., the lower end of the main body notch 155, and a notch side surface 159, which is a surface that follows the up-down direction.

Here, the main body 150 is generally cylindrical as described above, and the outer diameter and inner diameter change depending on the position along the imaginary axis IL of the main body 150. To explain further, the main body 150 shown in the figure has a reduced diameter section 161 and a large diameter section 163. Note that the diameter of the reduced diameter section 161 decreases from the bottom to the top in the vertical direction.

As shown in FIG. 3(c), the main body 150 has a first reduced diameter portion inner surface 162 and a second reduced diameter portion inner surface 164 on the inner peripheral surface of the reduced diameter portion 161. Here, the first reduced diameter portion inner surface 162 is a surface that runs along the vertical direction, while the second reduced diameter portion inner surface 164 is a curved surface that protrudes toward the inside of the main body 150. The main body 150 also has a large diameter portion inner surface 165 as the inner peripheral surface of the large diameter portion 163. Here, the large diameter portion inner surface 165 is a surface that runs along the vertical direction.

The main body 150 has a large diameter section protrusion 167 that protrudes radially inward from the large diameter section inner surface 165. This large diameter section protrusion 167 has a large diameter section abutment surface 169, which is a flat surface facing downward. Here, the large diameter section abutment surface 169 is the portion that abuts against the pile 70. In addition, the main body 150 is supported by the pile 70 when the pile 70 is inserted from the main body lower end 153 and the upper end 71 of the pile 70 abuts against the large diameter section abutment surface 169.

<Function of Bonded Body 100>
FIG. 4 is a diagram for explaining the function of the bonded body 100. As shown in FIG.
Next, the operation of the bonded body 100 will be described with reference to FIG.

First, as shown in FIG. 4(a), the lid 110 is provided on the upper side of the main body 150, and the upper side of the main body 150 is covered by the lid 110. At this time, the claw portion 115 is placed in the main body notch 155. To explain further, an opening 190 is formed by the claw curved surface 117 formed on the claw portion 115 of the lid 110, the notch curved surface 157 provided in the main body notch 155 of the main body 150, and the notch side surface 159 of the main body notch 155. In the illustrated example, the opening 190 is approximately elliptical in shape.

The lid top surface 112 of the lid main body 111 receives pressure from the base body 30 (see FIG. 1(a)) (see arrow P in the figure). This pressure is transmitted to the main body 150 via the main body upper end 151, and is transmitted to the pile 70 from the large diameter portion abutment surface 169.

Here, the protrusion 114 of the lid body 110 is disposed inside the main body 150. This prevents the position of the lid body 110 relative to the main body 150, or more specifically, prevents the position in the direction intersecting the imaginary axis IL from shifting. In the illustrated example, the claw portion 115 of the lid body 110 is disposed inside the main body notch 155 of the main body 150. This prevents the position of the lid body 110 relative to the main body 150 from shifting. More specifically, this prevents the lid body 110 from rotating relative to the main body 150.

In this embodiment, the lid 110 is not fixed to the main body 150 by welding or the like. The protrusion 114 is smaller than the internal dimensions of the main body 150. This allows the relative position of the lid 110 to the main body 150 to change. As a result, for example, during the construction stage, damage to the joined body 100 caused by misalignment of the lid 110 and the main body 150 is suppressed. Similarly, the claw portion 115 is smaller than the internal dimensions of the main body notch 155. This allows the relative position of the claw portion 115 to the main body notch 155 to change, suppressing damage to the joined body 100.

In addition, in the illustrated example, the diameter-reducing portion 161 of the main body 150 is structured so that the diameter decreases from the bottom to the top in the vertical direction, improving the strength of the main body 150 in the direction intersecting the imaginary axis IL, i.e., in the bending direction. Furthermore, providing the main body 150 with the diameter-reducing portion 161 reduces the material cost of the main body 150.

<How to build Building 1>
FIG. 5 is a diagram for explaining a method for constructing the building 1. In FIG.
Next, a method for constructing the building 1, i.e., a method for manufacturing the building 1, will be described with reference to FIG.

First, as shown in FIG. 5(a), a pile 70 is buried in the ground. For example, the pile 70 may be buried in the ground while being rotated (see arrow A in the figure). Then, although not shown in the figure, water is injected into the inside of the pile 70 as a filler.

Next, as shown in FIG. 5(b), the main body 150 is provided on the upper end 71 (see FIG. 5(a)) of the pile 70. Then, as shown in FIG. 5(c), the guide tube 90 is inserted inside the pile 70 and the main body 150. More specifically, the folded portion (not shown) of the guide tube 90 is inserted toward the lower end of the pile 70. In the illustrated example, the guide tube 90 is bent at approximately 90 degrees, and the guide tube 90 protrudes from the opening 190 toward the outside of the main body 150. In other words, the illustrated guide tube 90 protrudes from the inside of the main body 150 in a direction that intersects the vertical direction, rather than vertically upward.

Next, as shown in FIG. 5(d), the lid 110 is provided on the upper side of the main body 150. As a result, the upper side of the main body 150 is covered by the lid 110. Then, as shown in FIG. 5(e), the opening 190 is covered by a sealing member 195. As a result, the intrusion of foreign matter from the outside of the main body 150 into the inside of the main body 150 through the opening 190 is suppressed. The sealing member 195 also suppresses the movement of the guide tube 90. Then, the base body 30 is placed on the upper side of the lid 110.

Here, the pile 70 is a pile-shaped ground reinforcement body, and the joint 100 is a geothermal cap with an opening 190. As described above, by providing the joint 100 between the upper end 71 of the pile 70, i.e., the head of the pile 70, and the foundation body 30, it becomes possible to use the pile 70 as a heat extraction pipe.

Here, after the pile 70 is installed as described above, the main body 150 is provided on the pile 70. At this time, the orientation of the main body 150, that is, the rotation angle around the virtual axis IL of the pile 70, can be adjusted. For example, when installing the pile 70, the pile 70 may be rotated while being embedded by a construction method. In such a construction method, the angle at which the pile 70 is finally installed changes depending on the condition of the ground. Therefore, unlike the present embodiment, if a hole is provided in the pile 70 itself to pass the guide pipe 90 through, the orientation of the opening may be limited. On the other hand, in this embodiment, the opening 190 is formed by the lid 110 and the main body 150. Therefore, the orientation of the opening 190 can be adjusted by rotating the main body 150 placed on the pile 70.

In addition, the depth to which the pile 70 is embedded may change depending on the conditions of the ground where the pile 70 is installed. For example, if the bottom end of the pile 70 hits bedrock, the pile 70 may not be embedded any further and the top end of the pile 70 may be cut off. Therefore, unlike this embodiment, if the pile 70 itself is configured to have a hole through which the guide pipe 90 passes, the part in which the hole is formed may be cut off. On the other hand, in this embodiment, the opening 190 is formed by the lid 110 and the main body 150. Therefore, even if the top end of the pile 70 is cut off, the opening 190 can be secured by providing the main body 150 to the cut pile 70.

<Modification>
Next, a modification of this embodiment will be described.

First, in the above description, the lid 110 is mounted on the upper side of the main body 150 and is not fixed by welding or the like. However, the main body 150 and the lid 110 may be fixed to each other.
In the above description, the outer diameter or the inner diameter of the main body 150 changes depending on the position along the imaginary axis IL, but this is not limiting. That is, at least one of the outer diameter and the inner diameter of the main body 150 may be constant.

In addition, in the above, it has been described that the claw curved surface 117 and the notch curved surface 157 are formed in the claw portion 115 and the main body notch 155, but this is not limited to this. At least one of the claw curved surface 117 and the notch curved surface 157 may be formed as a flat surface rather than a curved surface.

In addition, in the above description, the main body 150 is described as being approximately cylindrical, but is not limited to this. It may be a hollow member that is open at the top and bottom, and may have an outer shape of a rectangular parallelepiped or polygonal prism, etc.

In addition, although the above description has been given of the lid body 110 being substantially disc-shaped, this is not limiting. It may be made of a plate-shaped member that is substantially rectangular in plan view, or a member that is shaped like a rectangular parallelepiped or polygonal prism.

In the above, it has been described that the guide pipe 90 has an outgoing pipe 95 and a return pipe 97, but the guide pipe 90 may be formed of a single pipe or may be composed of three or more pipes. For example, the guide pipe 90 may be composed of four pipes.

In the above, the guide tube 90 is provided inside the pile 70 and the main body 150, and then the lid 110 is provided, but this is not limited to the above. For example, the main body 150 and the lid 110 may be provided after the guide tube 90 is provided on the pile 70. In addition, the guide tube 90 may be pulled out from the opening 190 after the main body 150 and the lid 110 are provided on the pile 70 with the guide tube 90 disposed inside. In addition, the guide tube 90 may be inserted from the opening 190 after the main body 150 and the lid 110 are provided on the pile 70.

In addition, in the above, it has been explained that a connector 100 is provided on each of the multiple piles 70 that make up the reinforcement body 50, but it is sufficient that a connector 100 is provided on at least one of the multiple piles 70 that make up the reinforcement body 50.

Various embodiments and modifications have been described above, but it goes without saying that these embodiments and modifications may be combined together.
Furthermore, the present disclosure is not limited to the above-described embodiments, and can be embodied in various forms without departing from the gist of the present disclosure.

The joint 100 is an example of a structure. The foundation 30 is an example of a foundation. The main body 150 is an example of a main body portion. The lid 110 is an example of a cover portion. The main body notch 155 is an example of a notch. The protrusion is an example of a claw portion 115. The central protrusion is an example of a protrusion 114. The protrusion curved surface is an example of a claw curved surface 117. The notch curved surface is an example of a notch curved surface 157. The foundation 30 and the reinforcing body 50 are examples of a foundation structure.

1 ... Building, 10 ... Building body, 30 ... Foundation body, 50 ... Reinforcement body, 70 ... Pile, 90 ... Guide pipe, 100 ... Joint body, 110 ... Cover body, 150 ... Body, 190 ... Opening

Claims (8)

A structure that supports the foundation of a building and is provided on a pile having a guide pipe through which a fluid that performs heat exchange flows, the structure comprising:
A main body portion which is a hollow member having an upper end and a lower end that are open, and into which the pile is inserted;
a cover portion provided at the upper end portion of the main body portion to cover the upper end portion and facing the foundation;
The main body portion has a notch recessed from the upper end portion toward the lower end portion,
the cover portion has a central protrusion protruding from a center side of an opposing surface facing the upper end portion of the main body portion, and a protrusion provided on an outer side of the central protrusion on the opposing surface ,
The thickness of the protrusion is aligned with the distance from the central protrusion on the opposing surface to the outer edge of the opposing surface,
A structure in which the protrusion is disposed within the notch, and an opening through which the guide tube passes is formed between the tip of the protrusion and the bottom of the notch. The central protrusion is
The structure according to claim 1 , wherein the central protrusion is arranged to protrude from the upper end of the main body toward the inside of the main body, and is formed with a dimension that allows the central protrusion to move while protruding into the inside of the main body. the tip of the protrusion has a protrusion curved surface that is a curved surface recessed in a direction away from the bottom of the notch,
3. The structure according to claim 1, wherein the bottom of the notch has a notch curved surface that is a curved surface recessed in a direction away from the tip of the protrusion. 4. The structure according to claim 1, wherein the main body portion is cylindrical and has a tapered portion in which the outer diameter of the main body portion decreases from the lower end side to the upper end side. 5. The structure according to claim 1, wherein the body portion and the cover portion are made of casting. A guide tube through which a fluid that performs heat exchange flows;
A pile having the guide pipe disposed therein;
A structure provided on the pile;
A foundation structure comprising: a foundation for a building supported by the structure,
The structure comprises:
A main body portion which is a cylindrical member having an open upper end and a open lower end, and into which the pile is inserted;
a cover portion that is a disk-shaped member provided at the upper end portion of the main body portion and covers the upper end portion, the cover portion facing the foundation;
The main body portion has a notch recessed from the upper end portion toward the lower end portion,
the cover portion has a protrusion provided at a center portion of an opposing surface facing the upper end portion of the main body portion, and a claw portion provided on the opposing surface outside the protrusion,
The thickness of the claw portion is aligned with the distance from the protrusion on the opposing surface to the outer edge of the opposing surface,
The claw portion is disposed in the notch, and an opening through which the guide tube passes is formed between a tip end of the claw portion and a bottom of the notch,
The tip of the claw portion has a claw portion curved surface that is a curved surface recessed in a direction away from the bottom of the cutout,
the bottom of the notch has a notch curved surface that is a curved surface recessed in a direction away from the tip of the claw portion,
The protrusion is positioned so as to protrude from the upper end of the main body into the inside of the main body, and is formed with dimensions that allow the protrusion to move while protruding into the inside of the main body. A structure that supports the foundation of a building and is provided on a pile having a guide pipe through which a fluid that performs heat exchange flows, the structure comprising:
A main body portion which is a hollow member having an upper end and a lower end that are open, and into which the pile is inserted;
a cover portion provided at the upper end portion of the main body portion to cover the upper end portion and facing the foundation;
The main body portion has a notch recessed from the upper end portion toward the lower end portion,
the cover portion has a central protrusion protruding from a center side of an opposing surface facing the upper end portion of the main body portion, and a protrusion provided on an outer side of the central protrusion on the opposing surface ,
The thickness of the protrusion is aligned with the distance from the central protrusion on the opposing surface to the outer edge of the opposing surface,
The protrusion is disposed in the notch, and an opening through which the guide pipe passes is formed between a tip of the protrusion and a bottom of the notch. A method for manufacturing a foundation for the building using the structure,
installing the pile in the ground;
providing the body portion on the pile;
placing the guide tube inside the pile;
covering the upper end of the body portion with the cover portion;
sealing the opening through which the guide tube projects;
and placing the foundation on top of the covering portion. A structure for supporting a foundation of a building, comprising a pile having an open upper end and a closed lower end, the pile having a guide pipe disposed therein through which a fluid for heat exchange flows, the structure comprising:
A main body is a hollow member having an upper end and a lower end that are open, the pile is inserted into the lower end, and the guide pipe protruding from the pile passes through the inside of the main body;
a cover portion provided at the upper end portion of the main body portion to cover the upper end portion and to face the foundation;
Equipped with
The main body portion has a notch recessed from the upper end portion toward the lower end portion,
the cover portion has a central protrusion protruding from a center side of an opposing surface facing the upper end portion of the main body portion, and a protrusion provided on an outer side of the central protrusion on the opposing surface,
the central projection is disposed within the body portion;
The protrusion is disposed within the notch, and an opening through which the guide tube passes is formed between the tip of the protrusion and the bottom of the notch.
Struct.

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