JP2007107200A - Installation method and creation method for prefabricated pile for heat exchange, and prefabricated pile for base - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an installation method for a prefabricated pile for heat exchange, which enables piping for heat exchange to be surely protected and fixed in the driving of the prefabricated pile by surely performing the preconstruction of the piping for heat exchange before the driving of the prefabricated pile, a creation method for the prefabricated pile for heat exchange, and the prefabricated pile for a base. <P>SOLUTION: This installation method for the prefabricated pile for heat exchange comprises: a first hanging step of sequentially paying out the piping for heat exchange on the ground side while making the piping for heat exchange positioned along the side part of the prefabricated pile for the base, along with the descent of the prefabricated pile for the base into an excavated hole, after the long wound flexible piping 3 for heat exchange, in which a folded part 4 is formed, one side of which is used for the supply of a heating medium and the other side of which is used for taking out the heating medium, is fixed to the lower end side of the side part of the prefabricated pile for the base; and a second hanging step of connecting the prefabricated pile for connection to the prefabricated pile for the base after the first hanging step, and of sequentially paying out the piping for heat exchange on the ground side while making the piping for heat exchange positioned along the side part of the connected prefabricated pile, along with the descent of the connected prefabricated pile into the excavated hole. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method for installing a pre-made pile for heat exchange, a method for creating a pre-made pile for heat exchange, and a pre-made pile for bottom.

When placing a ready-made pile as a foundation of a building, it is known to install a heat exchanging pipe around the ready-made pile for collecting underground heat (for example, see Patent Documents 1-4). .
JP 2003-148079 A JP 2003-206528 A JP 2004-332330 A JP 2004-333001 A

However, in the conventional method, sufficient consideration is given to protecting the heat exchange pipe when installing the heat exchange pipe when placing the ready-made pile, fixing the heat exchange pipe, and pre-construction of the heat exchange pipe. It was difficult to carry out the construction as it was.
The present invention was made in order to solve such a conventional problem, and its purpose is to reliably perform the pre-construction of the heat exchange pipe before placing the ready-made pile, and at the time of placing the ready-made pile An object of the present invention is to provide a method for installing a pre-made pile for heat exchange, a method for creating a pre-made pile for heat exchange, and a pre-made pile for bottom.

  In the invention according to claim 1, a long and flexible heat exchanging pipe having a folded portion and one for heating medium supply and the other for heating medium extraction is prepared for the bottom. After fixing to the lower end side of the side portion of the pile, the heat exchanging pipe is moved along the side portion of the ready-made pile for the bottom side while lowering the ready-made pile for the bottom portion into the excavation hole. After the first suspending step of sequentially feeding the piping, and after the first suspending step, the ready-made pile for connection is connected to the ready-made pile for the bottom, and the connected ready-made pile is lowered while being lowered into the excavation hole. And a second suspending step for sequentially feeding out the heat exchange pipe on the ground side while keeping the heat exchange pipe along the side of the connected pile.

  The invention according to claim 2 is the installation method of the ready-made pile for heat exchange according to claim 1, wherein after the second suspension step, the ready-made pile for connection is connected to the ready-made pile for connection, and the connection A third suspending step of sequentially feeding the heat exchanging pipe on the ground side while moving the heat exchanging pipe along the side portion of the connected prefabricated pile while lowering the prepared pile into the excavation hole. And the third suspending step is repeated according to the depth of the excavation hole.

The invention according to claim 3 is the method of installing the ready-made pile for heat exchange according to claim 1, wherein the ready-made pile for the bottom portion has a plurality of folded portions of the pipe for heat exchange around the lower end side of the side portion. It is characterized by that.
The invention according to claim 4 is the method for installing the ready-made pile for heat exchange according to claim 1, wherein the folded portion of the heat exchange pipe has an arc shape and is fixed to the tip of the ready-made pile for the bottom portion. It is characterized by being fixed to a connecting member fixed to a perforated steel plate via a protective tube.

The invention according to claim 5 is the method for installing the prefabricated pile for heat exchange according to claim 1, wherein the folded portion of the pipe for heat exchange is provided with a wire to the perforated steel plate fixed to the tip of the prefabricated pile for the bottom portion. It is characterized by being fixed via.
The invention according to claim 6 is the method for installing the ready-made pile for heat exchange according to claim 1, wherein the heat exchange pipe is secured to the side of the ready-made pile for the bottom and the side of the ready-made pile for connection. It is fixed by a member.

The invention according to claim 7 is the method for installing the ready-made pile for heat exchange according to claim 1, wherein the heat exchange pipe is connected or after connection with the ready-made pile for bottom and the ready-made pile for connection or It is characterized by being fixed by a lashing member in the vicinity of the connecting portion at the time of connecting or connecting the ready-made piles for connection.
According to an eighth aspect of the present invention, the heat exchanging ready-made pile is installed in the excavation hole by the heat exchanging pre-made pile installation method according to any one of claims 1 to 7, and The concrete is casted on the surface, and a solid concrete layer is formed around the ready-made pile for heat exchange.

  The invention which concerns on Claim 9 is fixed to the front-end | tip part in the ready-made pile for bottom parts used for the installation method of the ready-made pile for heat exchange of any one of Claim 1 thru | or 4, 6 and 7 A perforated steel plate, a connecting member fixed to the perforated steel plate, and a protective tube that has an arc shape and is formed in an arc shape on the lower arc side, and is connected to the connecting member via the protective tube. It comprises a fixed long wound flexible heat exchange pipe.

  According to this invention, construction is easy by preparing the wound heat exchange piping as a reciprocating pair and fixing it to a ready-made pile at any time. Further, by protecting the folded portion of the wound heat exchange pipe, it is possible to prevent the heat exchange pipe from being deformed or damaged, and to greatly reduce the frictional resistance when placing concrete.

Hereinafter, the present invention will be described based on embodiments shown in the drawings.
FIGS. 1-15 shows the installation method of the ready-made pile for heat exchange which concerns on one Embodiment of this invention, the preparation method of the ready-made pile for heat exchange, and the ready-made pile for bottom parts. In this embodiment, a case where three ready-made piles are connected and a ready-made pile for heat exchange is installed will be described according to Procedure 1-11. The ready-made piles include steel pipe piles and concrete piles. In this embodiment, a steel pipe pile will be described, but a concrete pile may be used.

(Procedure 1)
As shown in FIG. 1, before the lower pile (bottom steel pipe pile) 2A is built, the lower pile 2A is suspended by a well-known method, and on the ground side, four places around the lower end side of the side portion of the lower pile 2A For example, a long and flexible flexible heat exchanging pipe 3 having a length twice as long as that of the excavation hole 1 is formed by forming a folded portion 4, one for heating medium supply and the other for heating. Fix for media removal. Then, as shown in FIG. 1, the lower pile 2A is suspended by a well-known method on the excavation hole 1 excavated by a well-known method.

  Here, as shown in FIGS. 2, 3, and 4, each folded portion 4 has a circular shape, and a protective tube 5 made of a SUS flexible tube formed into an arc shape in the lower arc portion. It is covered and wrapped with vinyl tape. A connecting member 7 fixed to a perforated steel plate 6 fixed to the tip 2a of the lower pile 2A is fixed to the protective tube 5 portion. The connecting member 7 includes a U-shaped tube 7a attached to the protective tube 5, a flat plate 7b fixed to the perforated steel plate 6, and a bolt 7c for connecting the U-shaped tube 7a and the flat plate 7b. Further, the upper side of each folded portion 4 is secured to the lower pile 2A by a securing member 8 made of a PP band.

  As the heat exchange pipe 3, for example, an aluminum reinforcing layer is laminated on the outer periphery of a hollow interior polyethylene (high heat-resistant PE) via a modified polyethylene layer (adhesive layer), and a modified polyethylene layer ( A long flexible polyethylene pipe (for example, Super Eslometax manufactured by Sekisui Chemical Co., Ltd.) obtained by laminating exterior polyethylene (high density PE) via an adhesive layer) was used.

A thermocouple 9 is attached to the heat exchange pipe 3. The attachment procedure will be described with reference to FIG.
First, as shown in FIG. 5A, the heat exchange pipe 3 having a length of, for example, 50 m and a winding diameter of 1 m wound in a roll shape is stretched as shown in FIG. 5B. Next, as shown in FIG. 5C, when the heat exchanging pipe 3 is extended by about 25 m, the SUS flexible pipe 5a is inserted to a position of 20 m. Next, as shown in FIG. 5 (d), the 150φ PVC pipe 5b is bent together with the SUS flexible pipe 5a instead of the bender. Next, as shown in FIG. 5E, the remaining half of the heat exchange pipe 3 is extended. Next, as shown in FIGS. 5 (f) and 5 (g), the thermocouple 9 and its wiring 9 a are arranged inside the heat exchange pipe 3, and an aluminum tape 10 is pasted thereon, and the aluminum tape 10 is placed on the aluminum tape 10. It is fixed with a tightening ring 11 (for example, Insulok (trade name)), and further, a vinyl tape 12 is wound around and fixed. The protective tube 5 made of a SUS flexible tube formed into an arc shape is subjected to caulking. Next, as shown in FIGS. 5 (h) and (i), the heat exchange pipe 3 is wound into a roll having a winding diameter of 1.5 m, for example.

(Procedure 2)
As shown in FIG. 6, while lowering the lower pile 2A into the excavation hole 1, the side walls of the lower pile 2A are operated by operating the heat exchange pipe rolls 3A, 3B, 3C, 3D comprising the four heat exchange pipes 3 The heat exchanging pipe 3 is sequentially fed out along, for example, the heat exchanging pipe 3 is secured to the lower pile 2A by a securing member 8 made of a PP band at a position of 3 m, and the lower pile 2A is further inserted into the excavation hole 1 The heat exchange pipe rolls 3A, 3B, 3C, and 3D are operated while descending, and the heat exchange pipe 3 is sequentially fed out along the side wall of the lower pile 2A.

(Procedure 3)
As shown in FIG. 7, when the lower pile 2 </ b> A descends by a predetermined depth, as shown in FIG. 8, the lower pile 2 </ b> A is supported by the pile receiving device 15, and the middle pile (connecting steel pipe pile) 2 </ b> B is obtained by a known method. The middle pile 2B is joined to the lower pile 2A by welding or the like at the joint 16 by hanging and a well-known method.
(Procedure 4)
As shown in FIG. 9, the middle pile 2 </ b> B is lifted by a known method, and the lower pile 2 </ b> A lifted along with the lifting of the middle pile 2 </ b> B is lifted to a position away from the pile receiving device 15, and the pile receiving device 15 is removed.

(Procedure 5)
As shown in FIG. 10, the heat exchanging pipe 3 is operated by operating the heat exchanging pipe rolls 3A, 3B, 3C, 3D while lowering the middle pile 2B connected to the lower pile 2A into the excavation hole 1 by a known method. The intermediate piles 2B are successively fed out along the side wall of the intermediate pile 2B, for example, the heat exchanging pipe 3 is secured to the intermediate pile 2B by a securing member 8 made of a PP band at a position of 3 m, and further connected to the lower pile 2A The heat exchange pipe rolls 3A, 3B, 3C, and 3D are operated while the 2B is lowered into the excavation hole 1, and the heat exchange pipe 3 is sequentially fed out along the side wall of the middle pile 2B.

(Procedure 6)
As shown in FIG. 11, when the middle pile 2B connected to the lower pile 2A descends by a predetermined depth, the middle pile 2B is supported by the pile receiving device 15 in the same manner as the procedure 3, and the upper pile (steel pipe pile for connection) 2C is suspended by a known method, and the upper pile 2C is joined to the middle pile 2B by welding or the like at the joint 17 by a known method.

(Procedure 7)
As shown in FIG. 12, the upper pile 2 </ b> C is lifted by a well-known method, the middle pile 2 </ b> B lifted along with the lifting of the upper pile 2 </ b> C is raised to a position away from the pile receiving device 15, and the pile receiving device 15 is removed.
(Procedure 8)
As shown in FIG. 13, the heat exchange pipe 3 is operated by operating the heat exchange pipe rolls 3A, 3B, 3C, 3D while lowering the upper pile 2C connected to the middle pile 2B into the excavation hole 1 by a known method. The intermediate pile connected to the lower pile 2A, with the heat exchange pipe 3 secured to the upper pile 2C by a securing member 8 made of a PP band at a position of 3 m, for example. While lowering the upper pile 2C connected to 2B into the excavation hole 1, the heat exchange pipe rolls 3A, 3B, 3C, 3D are operated to sequentially feed out the heat exchange pipe 3 along the side wall of the upper pile 2C. Then, when the lower pile 2A reaches the hole bottom 1a of the excavation hole 1, the lowering of the connection pile is stopped, and the well-known suspension device is removed.

(Procedure 9)
As shown in FIG. 14, each of the four heat exchange pipes 3 is connected to a water pressure test device, and a predetermined water pressure test is performed.
(Procedure 10)
As shown in FIG. 15, the wiring 9a of the thermocouple 9 is connected to a thermocouple measuring instrument, and the measured value of each thermocouple 9 is measured.

(Procedure 11)
Concrete is laid between the connection pile built in step 8 and the excavation hole 1 to form a solid concrete layer. At the time of placing concrete, air flows into the connection pile from the hole in the perforated steel plate 6 of the lower pile 2A.
As described above, according to the present embodiment, at the stage before the lower pile 2A is built, the folded portion 4 of the heat exchanging pipe 3 fixed to the four surroundings on the lower end side of the side portion of the lower pile 2A is provided. Since the lower arc portion is covered with a protective tube 5 made of a SUS flexible tube formed in an arc shape, and is formed in advance with a vinyl tape wrapped around it, By simply fixing the portion of the protective tube 5 to the connecting member 7 fixed to the perforated steel plate 6 fixed to the tip 2a of the lower pile 2A, the folded portion 4 of the heat exchange pipe 3 is attached to the lower pile 2A. It can be fixed securely. The folded portion 4 of the heat exchanging pipe 3 securely fixed in this way is heat exchange generated by friction with cement milk, sand, stones, gravel and the like when the concrete is placed in the assembly work procedure 11 for the lower pile 2A. The deformation and breakage of the piping 3 can be prevented. In addition, it is desirable that the outer diameter of the lower pile 2A and the inner diameter of the excavation hole 1 are not separated in order to recover the underground heat. In this embodiment, the interval is reduced as long as there is no problem such as if the heat exchanging pipe 3 located outside the lower pile 2A hits the excavation hole 1 when the lower pile 2A is lowered, or if the lower pile 2A is lowered. can do.

  Next, in the procedure 2, since four sets of heat exchange pipes 3 are wound up as shown in FIG. 5, the heat pile pipe rolls 3A, 3B, 3C, 3D are operated to lower piles. 2A can be sequentially fed out along the side wall of the lower pile 2A while being lowered into the excavation hole 1. Further, in the procedure 1, the heat exchanging pipe 3 on the upper side of the folded portion 4 is secured to the lower pile 2A by the securing member 8 made of PP band. The piping 3 can be lowered along the lower pile 2A. Further, for example, the heat exchanging pipe 3 is secured to the lower pile 2A by the securing member 8 made of a PP band at a position of 3 m. The heat exchanging pipe 3 positioned between the lower pile 2 and the lower pile 2A is lowered without being affected. Therefore, by lowering the lower pile 2A and feeding the heat exchanging pipe 3 in synchronism, it is possible to build the heat exchanging pipe 3 along the side of the lower pile 2A.

  Next, in the procedure 3, after the construction of the length of the lower pile 2A (for example, 6-8 m) is finished, the pile receiving device 15 is attached to the head side of the lower pile 2A to attach the lower pile 2A to the lower pile 2A. The intermediate pile 2B can be joined by welding or the like. At this time, the pile receiving device 15 can support the lower pile 2 </ b> A with three cambers 15 a provided on another side surface that is not the side surface on which the four heat exchange pipes 3 are located. Accordingly, there is no problem even if the four long heat exchange pipes 3 are along the side wall of the lower pile 2A. Moreover, since the heat exchanging pipe 3 on the upper side of the joint portion 16 is secured to the intermediate pile 2B by the securing member 8 made of PP band, four sets of heat exchanging pipes 3 are formed at the time of installation in the procedure 5. It can descend along the middle pile 2B.

  Next, in the procedure 4, the middle pile 2B of the middle pile 2B is lifted, the lower pile 2A is separated from the pile receiving device 15, and the pile receiving device 15 is removed. At this time, since the heat exchange pipe 3 is secured by the securing members 8, the heat exchange pipe 3 is held in a state along the side walls of the lower pile 2A and the intermediate pile 2B without leaving the lower pile 2A and the intermediate pile 2B. Yes. Moreover, since the heat exchanging pipe 3 has flexibility, as shown in FIG. 9, the heat exchanging pipe 3 follows the movement of the middle pile 2B and the lower pile 2A and does not bend.

Next, in the procedure 5, as in the procedure 2, the four sets of heat exchange pipes 3 are operated by operating the heat exchange pipe rolls 3A, 3B, 3C, 3D, and the lower pile 2A and the middle pile 2B are lowered. Can be fed out sequentially.
Next, in the procedure 6, similarly to the procedure 3, the upper pile 2C can be joined to the middle pile 2B.

Next, in the procedure 7, similarly to the procedure 4, the upper pile 2C is lifted, the middle pile 2B is separated from the pile receiving device 15, and the pile receiving device 15 can be removed.
Next, in the procedure 8, similarly to the procedure 5, the four sets of heat exchange pipes 3 are operated by operating the heat exchange pipe rolls 3A, 3B, 3C, 3D, and the lower pile 2A, the middle pile 2B, and the upper pile 2C. It can be fed out sequentially with the descent.

Next, in the procedure 9, since it extends above the excavation hole 1 along the pile (the lower pile 2A, the middle pile 2B, the upper pile 2C) to which the heat exchange pipe 3 is connected, a water pressure test is performed. be able to.
Next, in the procedure 10, since it extends above the excavation hole 1 along the pile (the lower pile 2A, the middle pile 2B, and the upper pile 2C) to which the heat exchange pipe 3 is connected, Measurements can be made.

  Next, in the procedure 11, the folded portion 4 of the heat exchange pipe 3 is fixed to the lower end side of the lower pile 2A, and a plurality of lashes are formed along the side portions of the lower pile 2A, the middle pile 2B, and the upper pile 2C. Since it is secured by the member 8 and extends above the excavation hole 1 along the sides of the lower pile 2A, the middle pile 2B, and the upper pile 2C, cement milk, sand, stones, gravel, etc. at the time of concrete placement It is possible to prevent deformation and breakage of the heat exchanging pipe 3 caused by friction with the heat exchanger. Since the steel pipe pile for heat exchange created in this way can reduce the distance from the inner wall of the excavation hole 1, it is possible to effectively recover the underground heat.

  In the above embodiment, a case where a polyethylene pipe (for example, Super Ethromex made by Sekisui Chemical Co., Ltd.) is used as the heat exchanging pipe 3 has been described. However, as shown in FIGS. A tube made of density polyethylene (for example, a U tube manufactured by Inoac Corporation) may be used. A thermocouple 9 is attached to the heat exchange pipe 3 made of this tube. The attachment procedure will be described with reference to FIG.

  First, as shown in FIG. 16 (a), the heat-exchanged pipe 3 having a length of 20 m and a winding diameter of 2 m, for example, rolled is stretched as shown in FIG. 16 (b). Next, as shown in FIG. 16 (c), a thermocouple 9 and its wiring 9a are arranged inside the heat exchange pipe 3 in the U-shaped folded portion 4 of the heat exchange pipe 3, and on the The aluminum tape 10 is affixed, fixed on the aluminum tape 10 with a tightening ring 11 (for example, insulation lock (trade name)), and further wrapped with a vinyl tape 12 and fixed. Next, as shown in FIGS. 16D and 16E, the heat exchange pipe 3 is wound into a roll having a winding diameter of 2 m, for example.

When the heat exchange pipe 3 shown in FIG. 16 is used, as shown in FIG. 17, each folded portion 4 is attached to a flat plate 7a fixed to a perforated steel plate 6 fixed to the tip 2a of the lower pile 2A. They are bundled through a wire 7d. Further, the upper side of each folded portion 4 is secured to the lower pile 2A by a securing member 8 made of a PP band.
Moreover, although the said embodiment demonstrated the case where three steel pipe piles (lower pile 2A, middle pile 2B, upper pile 2C) were used, this invention is not restricted to this, One or more steel pipe piles are connected. The number of connections may be appropriately selected according to the purpose of use.

  Moreover, although the said embodiment demonstrated the case where the four heat exchange piping 3 was arrange | positioned at intervals of 90 degree | times, this invention is not limited to this, The pipe 3 for heat exchange is an arbitrary angle of a steel pipe pile. Can be placed around.

It is explanatory drawing which shows the state before construction of the lower pile (steel pipe pile for bottom parts) 2. FIG. It is a top view of the piping 3 for heat exchange. It is sectional drawing of 2 A of lower piles. It is a side view by the side of the lower end part of lower pile 2A. It is explanatory drawing which shows the assembly procedure of the piping 3 for heat exchange. It is explanatory drawing which shows the erection state of lower pile 2A. It is explanatory drawing which shows the state which connects the middle pile (steel pipe pile for a connection) 2B to 2 A of lower piles. It is explanatory drawing of a pile receiver. It is explanatory drawing which shows the state which removes the pile receiving apparatus 15. FIG. It is explanatory drawing which shows the built-in state of the connection pile which connected the middle pile 2B to 2 A of lower piles. It is explanatory drawing which shows the state which connects the upper pile (steel pipe pile for connection) 2C to the middle pile 2B. It is explanatory drawing which shows the state which removes the pile receiving apparatus. It is explanatory drawing which shows the built-in state of the connection pile which connected the upper pile 2C to the middle pile 2B connected to 2 A of lower piles. It is explanatory drawing which shows the state which performs the water pressure test of the piping 3 for heat exchange. It is explanatory drawing which shows the state which performs the test of the thermocouple 9 provided in the piping 3 for heat exchange. It is explanatory drawing which shows the assembly procedure of the piping 3 for heat exchange. It is a side view by the side of the lower end part of lower pile 2A at the time of using another piping 3 for heat exchange.

Explanation of symbols

1 Drilling hole 2A Lower pile (steel pipe pile for bottom)
2B Medium pile (steel pipe pile for connection)
2C upper pile (steel pipe pile for connection)
3 Heat exchange pipes 3A, 3B, 3C, 3D Heat exchange pipe rolls 4 Turn-up part 5 Protective pipe 6 Perforated steel sheet 7 Connecting member 8 Secure member 15 Pile receiving device 16, 17 Joint part

Claims (9)

A long and flexible heat exchanging pipe having a folded portion and one for heat medium supply and the other for heat medium removal is attached to the lower end side of the side of the ready-made pile for the bottom. After fixing, the first suspension for sequentially feeding out the heat exchange pipe on the ground side while moving the heat exchange pipe along the side of the ready pile for bottom while lowering the ready pile for bottom into the excavation hole Process,
After the first suspending step, the ready-made pile for connection is connected to the ready-made pile for the bottom, and the pipe for heat exchange is connected to the ready-made pile while the connected ready-made pile is lowered into the excavation hole. A second suspension step of sequentially drawing out the heat exchange pipe on the ground side along the side, and a method for installing a prefabricated pile for heat exchange. In the installation method of the ready-made pile for heat exchange of Claim 1,
After the second suspension step, the ready-made pile for connection is connected to the ready-made pile for connection, and the ready-made pile connected to the heat exchange pipe is lowered while the connected ready-made pile is lowered into the excavation hole. A third hoisting step of sequentially feeding out the heat exchange pipe on the ground side along the side of the pile;
The method for installing a ready-made pile for heat exchange, wherein the third suspending step is repeated according to the depth of the excavation hole. In the installation method of the ready-made pile for heat exchange of Claim 1,
The said ready-made pile for bottom parts has two or more return | turnback parts of the said piping for heat exchange around the lower end side of a side part. The installation method of the ready-made pile for heat exchange characterized by the above-mentioned. In the installation method of the ready-made pile for heat exchange of Claim 1,
The folded portion of the heat exchange pipe has an arc shape, and is fixed to a connecting member fixed to a perforated steel plate fixed to a tip end portion of the ready-made pile for the bottom portion through a protective tube. How to install ready-made piles for heat exchange. In the installation method of the ready-made pile for heat exchange of Claim 1,
The folded portion of the heat exchanging pipe is fixed to a perforated steel plate fixed to the tip of the ready-made pile for the bottom portion via a wire. In the installation method of the ready-made pile for heat exchange of Claim 1,
The said heat exchanging piping is fixed to the side part of the said ready-made pile for bottom parts, and the side part of the said ready-made pile for connection by the securing member. The installation method of the ready-made pile for heat exchange characterized by the above-mentioned. In the installation method of the ready-made pile for heat exchange of Claim 1,
The heat exchanging pipe is fixed by a securing member in the vicinity of the connecting portion when the prefabricated pile for the bottom and the prefabricated pile for connection are connected or after the connection or when the prefabricated pile for connection is connected or connected. A method for installing ready-made piles for heat exchange.   After installing the pre-made pile for heat exchange in the excavation hole by the method for installing the pre-made pile for heat exchange according to any one of claims 1 to 7, concrete is placed in the excavation hole, A method for constructing a ready-made pile for heat exchange, wherein a solid concrete layer is formed around the ready-made pile for heat exchange. In the ready-made pile for the bottom part used for the installation method of the ready-made pile for heat exchange according to any one of claims 1 to 4, claim 6, and claim 7,
A perforated steel plate fixed to the tip,
A connecting member fixed to the perforated steel sheet;
A long and flexible heat exchanging pipe having an arc shape and having a protective tube formed in an arc shape on the lower arc side and fixed to the connecting member via the protective tube A ready-made pile for the bottom, comprising:

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