JP6085756B1 - Installation method of heat pipe and construction tool used when installing heat pipe - Google Patents

Abstract

A heat pipe installation method having excellent workability is provided. A heat pipe includes a restraining step for restraining a pipe tip portion to a substantially straight state by fixing a restraining jig having a rigidity that is higher than that of the heat pipe and is substantially straight, and a restraining step. Later, in a state where the tip side of the boring rod 51 of the boring machine 50 is engaged with the engagement jig 31 integrated with the pipe tip portion 13, the boring machine 50 is operated and the pipe tip portion 13 together with the boring rod 51. Is moved below the vertical hole 55 to insert the heat pipe 11 into the vertical hole 55, and an insertion step for reaching the pipe tip 13 to the installation depth. After the insertion step, the boring rod 51 is pulled upward to make the boring. Rod pulling rod for separating the rod 51 from the engagement jig 31 and pulling it out from the vertical hole 55 Tsu to run and up. [Selection] Figure 5

Description

  The present invention relates to a method of installing a heat pipe in a vertical hole extending downward from the ground.

  Conventionally, a heat pipe has been installed in the ground in order to use underground heat. Patent Document 1 describes an excavated body for forming a vertical hole in which a heat pipe is installed.

  Specifically, in the prior art described in Patent Document 1, when forming a vertical hole using an excavation body, the excavation body is supported and erected by a press-fitting rotation device. In this state, when the press-fitting and rotating device is operated to press-fit and rotate the excavation body, the excavation part provided at the tip of the excavation body excavates the soil and the excavation body is screwed into the ground. Subsequently, a heat pipe is arranged in the bore of the base body of the buried excavation body, and after that, after filling the filler between the base body and the heat pipe, the base body is pulled out leaving the excavation part at the tip. Yes.

JP 2008-138398 A

  By the way, conventionally, as a method of installing the heat pipe in the vertical hole, a method of installing the heat pipe in the base in a state where the base used for excavation exists in the vertical hole (the method described in Patent Document 1), and a base There was a method of installing a heat pipe after pulling out. In the former case, there has been a problem that it takes time to pull out the base body with the heat pipe installed. On the other hand, in the latter case, it is difficult to put the heat pipe straight along the vertical hole, and when installing a bent heat pipe, there is a possibility that the heat pipe hits the wall surface of the vertical hole and the vertical hole may collapse. . In any method, when muddy water is present in the vertical hole, the heat pipe cannot be easily installed due to the resistance of the muddy water.

  This invention is made | formed in view of such a situation, and it aims at providing the installation method of the heat pipe excellent in workability.

  In order to solve the above-mentioned problem, the first invention is a method of installing a heat pipe in a vertical hole extending downward from the ground, wherein the pipe tip portion, which is the tip portion of the heat pipe, is more rigid than the heat pipe. By boring the boring machine to a constraining step that constrains the pipe tip to a substantially straight state by fixing a high and substantially straight restraining jig, and after the constraining step, the engagement jig integrated with the pipe tip. With the end of the rod engaged, operate the boring machine and move the pipe tip together with the boring rod down the vertical hole to insert the heat pipe into the vertical hole and install the pipe tip deeper. The insertion step to reach the end, and after the insertion step, pull the boring rod upward to To separate run and a rod pulling withdrawing from the vertical hole.

  According to a second aspect, in the first aspect, the tip end portion of the boring rod is engaged with the engagement jig at the tip end portion of the pipe at the tip end side of the rear end of the restraining range of the restraining jig.

  According to a third invention, in the first or second invention, the engagement jig has a rod-like portion and a plate-like portion connected to the distal end side of the rod-like portion. In the process of inserting the rod-shaped part of the engagement jig into the tip opening of the boring rod, engaging the tip of the boring rod with the engagement jig, and inserting the heat pipe into the vertical hole, the tip surface of the boring rod is plate-shaped In the rod pulling step, in the process of pulling the boring rod upward, the rod-shaped portion is pulled out from the tip opening of the boring rod, and the boring rod is engaged. Separate from fitting jig.

  According to a fourth invention, in any one of the first to third inventions, the engaging jig is formed separately from the pipe tip, and the restraining jig and the engaging jig are the pipe tip. Is fixed to the tip of the pipe so as to sandwich it.

  5th invention is the construction tool used when installing a heat pipe in the vertical hole extended below from the ground, Comprising: It is a jig | tool which is more rigid than a heat pipe and is substantially straight, Comprising: The front-end | tip part of a heat pipe A restraining jig that is fixed to the pipe tip, and restrains the pipe tip to a substantially straight state, and a jig that is shorter than the restraining jig, and is fixed to the pipe tip, and the heat pipe is And an engagement jig that engages with the tip end side of the boring rod of the boring machine when inserted into the boring machine.

  In 1st invention, when inserting a heat pipe into a vertical hole, the pipe front-end | tip part is restrained in the substantially straight state. Therefore, when a bent heat pipe is inserted into the vertical hole, the heat pipe can be installed with almost no collapse of the vertical hole even if the cylindrical body such as the base body is not in the vertical hole.

  Further, in the first invention, since the tip end side of the boring rod of the boring machine is engaged with the engaging jig integrated with the pipe tip portion, if there is enough space to install the boring machine, Pipes can be installed. In addition, because the power of the boring machine is used to move the tip of the pipe together with the boring rod to the lower side of the vertical hole, the heat pipe can be easily put straight along the vertical hole, and even if it receives mud water resistance The heat pipe can be easily inserted into the vertical hole. According to 1st invention, it can construct in a narrow space and can provide the installation method of the heat pipe excellent in workability.

  In the second invention, during the insertion step, a pushing force from the boring rod to the engagement jig acts on a position closer to the front end side than the rear end of the restriction range of the pipe front end portion by the restriction jig. That is, the pushing force acts on a position close to the tip of the heat pipe. Accordingly, the pipe tip can be easily moved straight downward during the insertion step.

  In the third invention, the engaging jig and the tip of the pipe can be pushed downward by the boring rod in the insertion step while the tip side of the boring rod is not processed, and in the rod pulling step. At that time, the boring rod can be separated from the engaging jig simply by pulling the boring rod upward.

  In the fourth invention, since not only the restraining jig but also the engaging jig is fixed to the pipe tip portion, the pipe tip portion can be firmly restrained in a substantially straight state.

  In the fifth invention, similarly to the first invention, it is possible to provide a heat pipe installation method that can be installed in a narrow space and has excellent workability.

Perspective view of the tip of the heat pipe It is a figure which shows a restraint jig, (a) Side view, (b) The figure seen from the back side in the length direction It is a figure which shows an engagement jig | tool, (a) Side view, (b) The figure seen from the back side in the length direction The top view of the pipe tip with the restraining jig and engagement jig attached It is a schematic diagram for demonstrating the installation method of a heat pipe, (a) The figure which shows the state before an insertion step, (b) The figure which shows the state in the insertion step It is a schematic diagram for demonstrating the installation method of a heat pipe, (c) The figure which shows the state which the insertion step completed, (d) The figure which shows the state in the rod extraction step It is the model which shows the state where the front end side of the boring rod was engaged with the engagement jig, and the figure which looked at the engagement jig etc. in the vertical hole from the top of the vertical hole

  Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. The following embodiment is an example of the present invention, and is not intended to limit the scope of the present invention, its application, or its use.

[1. About heat pipe]
The heat pipe 11 is a set of two pipes, and is composed of two pipes over the entire length. As shown in FIG. 1, a folded portion where two pipes are connected is formed at the tip of the heat pipe 11. The heat pipe 11 is carried into the construction site while being wound in a coil shape (see FIG. 5). Although the length of the heat pipe 11 changes with construction sites, it is 10 m to 200 m, for example. A tip 13 of the heat pipe 11 (for example, a range of about 2 m from the tip, referred to as a “pipe tip”) has an insertion hole 13a on the tip side. The distal end side of the pipe distal end portion 13 is formed in a tapered shape. Hereinafter, the surface of the heat pipe 11 where the two pipes can be viewed from the front is referred to as “side surface”. FIG. 1 is a view of the side surface of the pipe tip portion 13 as seen from an oblique direction.

[2. About construction tools for heat pipes]
Then, the construction tool 10 used when installing the heat pipe 11 is demonstrated. The construction tool 10 includes a restraining jig 21 for restraining the pipe tip portion 13 in a substantially straight state, and an engagement jig 31 that engages with the tip side of the boring rod 51 of the boring machine 50. The restraining jig 21 and the engaging jig 31 are both steel members and have higher rigidity than the heat pipe 11.

  As shown in FIG. 2A, the restraining jig 21 includes a long plate portion 22 and a rod-like portion 23 connected to the rear side of the long plate portion 22. Similarly to the restraining jig 21, the engaging jig 31 also includes a long plate portion 32 and a rod-like portion 33 connected to the rear side of the long plate portion 32, as shown in FIG. ing.

  In this paragraph, a configuration common to the restraining jig 21 and the engaging jig 31 will be described. In both the restraining jig 21 and the engaging jig 31, the long plate portions 22, 32 and the rod-like portions 23, 33 are both straight steel materials. The long plate portions 22 and 32 and the rod-like portions 23 and 33 are integrated so that the restraining jig 21 or the engaging jig 31 is straight (the length directions are matched). The rod-like portions 23 and 33 are fixed to the center in the width direction on the rear side of the long plate portions 22 and 32. The long plate portions 22 and 32 have a tapered end portion (a trapezoidal portion in FIG. 2A or FIG. 3A) and a portion excluding the distal end portion (FIG. 2A or FIG. 3A). The width of the rectangular part) is uniform in the length direction. In the long plate portions 22 and 32, bolt insertion holes 22a and 32a are formed at positions closer to the rear of the trapezoidal portion and the rectangular portion, respectively.

  In the restraining jig 21 and the engaging jig 31, the lengths of the long plate portions 22 and 32 are the same except for the thickness. The long plate portions 22 and 32 have a width of 4.4 cm and a length of 50 cm. The width of the long plate portions 22 and 32 is narrower than the width of the side surface of the heat pipe 11. For example, the width of the side surface of the heat pipe 11 is 6.5 cm. Further, the thickness of the long plate portion 22 of the restraining jig 21 is 6 mm, and the thickness of the long plate portion 32 of the engaging jig 31 is 9 mm. The long plate portion 32 of the engagement jig 31 is thicker than the long plate portion 22 of the restraining jig 21.

  In the restraining jig 21, as shown in FIG. 2 (b), the center of the long plate portion 22 in the thickness direction and the center of the rod-like portion 23 substantially coincide with each other. In the restraining jig 21, the rod-like portion 23 is fixed to the long plate portion 22 by welding in a state where the rod-like portion 23 is fitted in a cutout 24 (for example, a cutout having a length of 5 cm) formed on the rear side of the long plate portion 22. Has been. The rod-shaped part 23 has a length of 155 cm (the protruding length from the long plate part 22 is 150 cm) and a diameter of 1.3 cm. In the present embodiment, the length of the restraining jig 21 is 2 m.

  On the other hand, in the engagement jig 31, as shown in FIG. 3B, the center of the long plate portion 32 in the thickness direction and the center of the rod-shaped portion 33 do not coincide with each other. A rod-like portion 33 is fixed on the top by welding. For example, the rod-shaped portion 33 has a length of 20 cm (a protrusion length from the long plate portion 32 is 15 cm) and a diameter of 0.9 cm. The rod-shaped portion 33 of the engagement jig 31 is thinner and shorter than the rod-shaped portion 23 of the restraining jig 21. The length of the engagement jig 31 is 65 cm, which is shorter than the restraining jig 21. The dimensions of the restraining jig 21, the engaging jig 31, and the heat pipe 11 are merely examples, and are not limited to the values in the present embodiment.

[3. About heat pipe installation method]
With reference to FIGS. 4-7, the installation method (embedding method) of the heat pipe 11 is demonstrated. In FIG. 4, the hatched portion is the pipe tip portion 13.

  As a preparatory work, the operator performs a restraining step for restraining the pipe tip end portion 13 to a substantially straight state. In the restraining step, the operator extends the pipe tip portion 13 and arranges the restraining jig 21 and the engaging jig 31 along the pipe tip portion 13. The restraining jig 21 and the engaging jig 31 are arranged so that the long plate portions 22 and 32 are on the distal end side of the pipe distal end portion 13. The pipe tip 13 is sandwiched from both side surfaces by the long plate portion 22 of the restraining jig 21 and the long plate portion 32 of the engaging jig 31, and bolts are inserted into the insertion holes 22 a and 32 a of the long plate portions 22 and 32. Each bolt 35 is inserted and each bolt 35 is fastened (refer to Drawing 4). The bolt 35 on the distal end side is also inserted through the insertion hole 13 a of the pipe distal end portion 13. In the process of fastening the bolt 35, the distal end side of the pipe distal end portion 13 is pushed from both side surfaces by the long plate portions 22 and 32 and becomes substantially straight.

  The long plate portion 32 of the engagement jig 31 abuts the surface opposite to the side on which the rod-shaped portion 33 is fixed. Therefore, a gap corresponding to the thickness of the long plate portion 32 is formed between the rod-shaped portion 33 and the pipe tip portion 13. Further, the long plate portion 22 and the long plate portion 32 overlap each other when viewed from the side. The distal ends of the long plate portions 22 and 32 protrude from the distal end of the pipe distal end portion 13. Therefore, the tip of the pipe tip portion 13 is protected by the long plate portions 22 and 32.

  Next, in the restraint step, the operator puts the pipe tip portion 13 and the rod-like portion 23 together with the rod-like portion 23 of the restraining jig 21 along the pipe tip-end portion 13 together with the tape 36 (for example, vinyl Wrap tape or gummed tape. The tape 36 is wound from the vicinity of one end of the rod-shaped portion 23 to the vicinity of the other end. Thereby, the pipe front-end | tip part 13 is fixed also to the rod-shaped part 23, and is restrained in a substantially straight state over about 2 m. The rod-shaped portion 33 of the engagement jig 31 is exposed without being wound with the tape 36.

  The heat pipe 11 is made of a hard resin, and a large repulsive force is generated when it is straightened. In the present embodiment, the distal end side of the restraining jig 21 is constituted by a long plate portion 22 that is more resistant to bending than round steel, and the pipe distal end portion 13 is also restrained by the engagement jig 31 from the opposite side. . Therefore, it is possible to restrain the pipe tip end portion 13 in a substantially straight state with almost no bending of the restraining jig 21 and the engaging jig 31.

  At the construction site, the heat pipe 11 is supported by a tripod pipe rod 60 as shown in FIG. Specifically, the heat pipe 11 is hooked on the first beam 61 of the tripod pipe rod 60 in a coiled state above the main body of the boring machine 50. A part of the heat pipe 11 is unwound, hooked on the second beam 62 (the beam above the first beam 61) of the tripod pipe rod 60, folded back by the second beam 62, and extended downward. Moreover, the pipe front-end | tip part 13 is in the state shown in FIG. 4, and the restraining jig | tool 21 and the engagement jig | tool 31 are being fixed. The restraining step may be performed before the heat pipe 11 is hooked on the first beam 61 or may be performed in a state where the heat pipe 11 is hooked on the first beam 61. Moreover, although the heat pipe 11 was hooked on the tripod pipe rod 60 and unwound, the heat pipe 11 may be attached to a large reel device and unwound.

  At the construction site, a vertical hole forming step for forming the vertical hole 55 by the boring machine 50 is performed. The vertical hole 55 is formed in a vertical direction at a planned installation location of the heat pipe 11. The vertical hole 55 has a depth corresponding to the embedded length of the heat pipe 11. The diameter of the vertical hole 55 is, for example, about 10 cm. A cylindrical tube 56 is installed at the entrance of the vertical hole 55. The vertical hole forming step may be performed before or after the restraining step.

  From this state, an insertion step of inserting the heat pipe 11 into the vertical hole 55 is performed. In the insertion step, first, an operator manually inserts the pipe tip 13 into the vertical hole 55 from the entrance of the vertical hole 55 a little, and inserts the boring rod into the rod-like portion 33 of the engagement jig 31 integrated with the pipe tip 13. The tip end side of 51 is engaged. Specifically, the boring rod 51 is formed in a circular tube shape. As shown in FIG. 7, the rod-shaped portion 33 of the engagement jig 31 is inserted into the tip opening of the boring rod 51. In FIG. 7, the boring rod 51 is hatched.

  Then, the boring machine 50 is operated to push the pipe tip portion 13 together with the boring rod 51 below the vertical hole 55. As shown in FIG. 7, the width of the long plate portion 32 is larger than the diameter (inner diameter) of the tip opening of the boring rod 51, the long plate portion 32 does not enter the boring rod 51, and the tip surface of the boring rod 51 is It hits the rear surface of the long plate portion 32 of the engagement jig 31. The rod-shaped portion 33 is caught from the boring rod 51 without being detached. The heat pipe 11 is gradually unwound and inserted into the vertical hole 55 as shown in FIG.

  In the insertion process, the boring rod 51 is added outside the vertical hole 55. Further, the worker holds the heat pipe 11 so that it does not move greatly from front to back and from side to side (not shown). In the vertical hole 55, muddy water having high viscosity exists from the middle. In the present embodiment, the pipe tip 13 is moved together with the boring rod 51 using the boring machine power (motor power) and the weights of the boring rod 51, the restraining jig 21 and the engaging jig 31. Since it is pushed below the vertical hole 55, the heat pipe 11 can be easily inserted into the vertical hole 55 even if it receives resistance from muddy water. As shown in FIG. 6C, when the tip of the pipe tip 13 reaches the installation depth, the insertion step ends.

  Subsequently, a rod extracting step of extracting the boring rod 51 from the vertical hole 55 is performed. In the rod drawing step, the boring machine 50 is operated while the heat pipe 11 is held outside the entrance of the vertical hole 55, and the boring rod 51 is pulled up as shown in FIG. 6 (d). Since the rod-shaped portion 33 of the engaging jig 31 is only inside the boring rod 51, the boring rod 51 is separated from the engaging jig 31 when the boring rod 51 is pulled up slightly. When all of the boring rods 51 separated from the engaging jig 31 are pulled out from the vertical holes 55, the rod pulling-out step ends. After completion of the rod pulling-out step, the heat pipe 11 remains in a predetermined installation position in the vertical hole 55 together with the restraining jig 21 and the engaging jig 31.

  Here, in the vertical hole 55, highly viscous muddy water exists around the heat pipe 11. Therefore, even if gravel is thrown into the vertical hole 55 in order to fill the periphery of the heat pipe 11 with gravel, the gravel is trapped by the muddy water and hardly sinks. Therefore, after the rod drawing step, a medicine supply step for supplying a separating agent into the vertical hole 55 is performed. In the medicine supply step, the separating agent is pumped into the vertical hole 55 using a pump. Thereby, the muddy water in the vertical hole 55 is separated into water and mud, and mud is precipitated. Next, a gravel loading step for throwing gravel into the vertical hole 55 is performed. Thereby, a gravel layer is formed around the heat pipe 11. The gravel layer is formed up to the entrance of the vertical hole 55, and the heat pipe 11 is fixed from the bottom of the hole to the entrance.

  With the above work, the installation work of one heat pipe 11 is completed. A plurality of vertical holes 55 are formed in the construction place, and the heat pipe 11 is installed in each vertical hole 55.

[4. Effects of embodiment, etc.]
In the present embodiment, when the coiled heat pipe 11 is inserted into the vertical hole 55, the pipe tip 13 is constrained in a substantially straight state. Therefore, even if the cylindrical body such as the base body is not in the vertical hole 55, the heat pipe 11 can be installed with almost no collapse of the vertical hole 55. However, also in the present embodiment, in the case of a loose ground where the vertical hole 55 collapses, a cylinder may be installed to protect the wall surface of the vertical hole 55.

  In the present embodiment, the engagement jig 31 integrated with the pipe distal end portion 13 is engaged with the distal end side of the boring rod 51 of the boring machine 50, so that the space for installing the boring machine 50 is sufficient. If there is, the heat pipe 11 can be installed. In addition, compared with the case where the excavation body described in patent document 1 is screwed into the ground, the heat pipe 11 can be installed with a small facility. Further, the boring rod can be easily pulled out compared to the base body of the excavated body.

  In addition, since the pipe tip 13 is moved below the vertical hole 55 together with the boring rod 51 using the power of the boring machine 50, the heat pipe 11 can be easily put straight along the vertical hole 55. The heat pipe 11 can be easily inserted into the vertical hole 55 even if the resistance is received. According to this Embodiment, it can construct in a narrow space and can implement | achieve the installation method of the heat pipe 11 excellent in workability.

  Further, in the present embodiment, the engagement jig 31 is shorter than the restraining jig 21, and the tip end portion 13 of the pipe is farther than the rear end (position of the rear end of the tape 36) of the restraining range by the restraining jig 21. At the side position, the front end side of the boring rod 51 is engaged with the engaging jig 31. For this reason, during the insertion step, the boring rod 51 is moved from the boring rod 51 to the engagement jig 31 at a position closer to the front end side (rear end face of the long plate portion 32) than the rear end of the restriction range of the pipe front end portion 13 by the restraining jig 21. The pushing force of. That is, the pushing force is applied to a position close to the tip of the heat pipe 11. Therefore, the pipe tip end portion 13 can be easily moved straight downward during the insertion step.

  Further, in the present embodiment, the engaging jig 31 and the pipe tip end portion 13 can be pushed downward by the boring rod 51 in the insertion step while the tip end side of the boring rod 51 is not processed. In the rod pulling step, the boring rod 51 can be separated from the engaging jig 31 only by pulling the boring rod 51 upward.

  Further, in the present embodiment, not only the restraining jig 21 but also the engaging jig 31 is fixed to the pipe tip portion 13, so that the pipe tip portion 13 can be firmly restrained in a substantially straight state. Further, the restraining jig 21 and the engaging jig 31 are formed in a long plate shape whose tip side is narrower than the width of the pipe tip portion 13. Therefore, when the integrated state of the pipe tip portion 13, the restraining jig 21 and the engaging jig 31 is viewed from the tip, the restraining jig 21 and the engaging jig are accommodated in the size of the vertical hole 55. The rigidity of 31 can be ensured.

[5. Other Embodiments]
In the above embodiment, the rear side of the restraining jig 21 is fixed to the pipe tip portion 13 with the tape 36. However, the fixing means is not limited to the tape 36, and for example, a wire or the like may be used.

  In the above-described embodiment, the engagement jig 31 is separate from the pipe tip portion 13, but the hook portion (engagement jig 31) where the tip opening of the boring rod 51 is caught on the pipe tip portion 13. ) May be integrally formed.

  Further, in the above embodiment, the boring rod 51 itself is engaged with the engaging jig 31, but a member for engaging the engaging jig 31 may be separately attached to the distal end side of the boring rod 51. Good.

  Moreover, in the said embodiment, the restraining jig | tool 21 may be formed in rod shape over the full length, and may be formed in long plate shape over the full length. Moreover, although the restraint length of the pipe front-end | tip part 13 by the restraint jig 21 was 2 m, restraint length is not limited to 2 m.

  The present invention is applicable to a method of installing a heat pipe in a vertical hole extending downward from the ground.

DESCRIPTION OF SYMBOLS 10 Construction tool 11 Heat pipe 13 Pipe tip part 21 Restraint jig 31 Engagement jig 50 Boring machine 51 Boring rod 55 Vertical hole

Claims (6)

A method of installing a heat pipe in a vertical hole extending downward from the ground,
By fixing , along the length direction of the pipe tip, a restraint jig and an engagement jig that are both rigid and substantially straighter than the heat pipe and are straight to the pipe tip that is the tip of the heat pipe. A constraining step for constraining the pipe tip to a substantially straight state;
After the constraint step, before Symbol engaging jig, in a state of engaging the distal end side of the boring rod boring machine, the pipe tip with the boring rod by operating the boring machine below the vertical hole An insertion step of inserting the heat pipe into the vertical hole by moving it, and reaching the pipe tip to an installation depth;
After the inserting step, by pulling up the boring rod upward, the rod pulling step for separating the boring rod from the engagement jig and pulling it out from the vertical hole is performed,
In the restraining step, the pipe tip is sandwiched between the restraining jig and the engaging jig to restrain the pipe tip in a substantially straight state. Method. A method of installing a heat pipe in a vertical hole extending downward from the ground,
A restraint step of restraining the pipe tip portion in a substantially straight state by fixing a substantially straight restraint jig having a higher rigidity than the heat pipe to the pipe tip portion, which is the tip portion of the heat pipe,
After the restraining step, with the engaging jig integrated with the pipe tip portion engaged with the tip side of the boring rod of the boring machine, the boring machine is operated and the pipe tip together with the boring rod. Inserting the heat pipe into the vertical hole by moving the part below the vertical hole, and inserting the pipe tip to the installation depth; and
After the inserting step, by pulling up the boring rod upward, the rod pulling step for separating the boring rod from the engagement jig and pulling it out from the vertical hole is performed,
The engagement jig has a rod-like portion and a plate-like portion connected to the tip side of the rod-like portion,
In the inserting step, the rod-shaped portion of the engagement jig is inserted into the distal end opening of the cylindrical boring rod, the distal end side of the boring rod is engaged with the engagement jig, and the heat pipe is inserted into the vertical hole. In the process of doing, the tip surface of the boring rod abuts on the plate-like portion, and the pipe tip portion is pushed downward together with the plate-like portion,
In the rod pulling step, in the process of pulling up the boring rod upward, the rod-shaped portion is pulled out from the opening at the tip of the boring rod, and the boring rod is separated from the engagement jig. Installation method. In the pipe tip at a position frontward of the rear end of the restraint range by the restraint jig, characterized in that engaging the front end side of the boring rod to said engaging jig, according to claim 1 or The installation method of the heat pipe of 2 . The engagement jig is formed separately from the pipe tip,
The heat pipe installation method according to claim 2, wherein the restraining jig and the engaging jig are fixed to the pipe tip so as to sandwich the pipe tip. A construction tool used when installing a heat pipe in a vertical hole extending downward from the ground,
A jig that is substantially straighter and has a rigidity higher than that of the heat pipe, and is fixed to a pipe tip that is a tip of the heat pipe along the length direction of the pipe. A restraining jig that restrains it in a straight state,
A jig that is higher in rigidity than the heat pipe and is substantially straight and shorter than the restraining jig, and is fixed to the pipe tip along the length direction of the pipe tip , and the heat pipe is attached to the vertical hole. An engagement jig that engages with the tip end side of the boring rod of the boring machine when inserted into the boring machine ,
The restraining jig and the engaging jig are fixed to the pipe tip portion so as to sandwich the pipe tip portion therebetween, thereby restraining the pipe tip portion in a substantially straight state. Construction tool to do. A construction tool used when installing a heat pipe in a vertical hole extending downward from the ground,
A jig that is substantially straight and has a higher rigidity than the heat pipe, and is fixed to a pipe tip that is a tip of the heat pipe, and a restraining jig that restrains the pipe tip to a substantially straight state;
It is a jig shorter than the restraining jig, and is engaged with the front end side of a cylindrical boring rod of a boring machine when the heat pipe is inserted into the vertical hole. With a jig,
The engaging jig includes a rod-like portion that is inserted into the opening of the tip of the boring rod, and a tip end surface of the boring rod that is connected to the tip of the rod-like portion and the heat pipe is inserted into the vertical hole. A construction tool characterized by having a plate-like part in contact therewith.

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