JP3190487U - Rotating jig for heat exchange pile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotating jig capable of installing a heat exchange pile having a pile head position below the ground surface at a predetermined position in an excavation hole by submerging by rotation. SOLUTION: A rotary cap 16 having an engaging portion 26 provided on a pile head 21 of a heat exchange pile A and a detachable engaging groove 27, and the rotary cap 16 and a rotary drive shaft 28 of an earth auger machine. U-shaped pipe fixing portion 23A, which is composed of a rotating rod 17 and fixes the upper end portions 4D of the heat exchange medium flow pipes 4A and 4B of the U-shaped pipe extending upward from the pile head 21 of the heat exchange pile A, respectively. Was provided on the rotating rod 17 extending upward from the rotating cap 16. [Selection diagram] Fig. 4

Description

  The present invention relates to a rotating jig for a heat exchanging pile, more specifically, a heat exchanging pile in which a heat exchanging U-shaped pipe in which a heat exchanging medium flows around the outer periphery of the pile body is arranged in the longitudinal direction. The present invention relates to a rotating jig for heat exchange piles used when laying while rotating to a predetermined position in an excavation hole excavated in advance by a machine.

  It is conventionally known to use a ready-made pile used as a foundation of a building as an underground heat exchanger. As an underground heat exchanger using such a ready-made foundation pile, a heat transfer tube with a coil structure that allows the heat exchange medium to flow around the outside of the ready-made pile is extended in the longitudinal direction, and this is applied to the pile by means of a band. There exists what was made into the structure attached to the outer peripheral surface (for example, patent document 1).

JP 2003-206528 A JP 2007-107200 A

  However, the thing of the said patent document 1 (Unexamined-Japanese-Patent No. 2003-206528) cannot succeed in an upper pile, and even if it succeeds in an upper pile, it will be accompanied by considerable difficulty in connecting a heat exchanger tube. In addition, when the two upper and lower piles that have been joined are laid while rotating into the excavation hole, the connected heat transfer tubes are wound around the outer peripheral surface of the upper pile, making it difficult to install.

  On the other hand, in the said patent document 2 (Unexamined-Japanese-Patent No. 2007-107200), the heat exchange piping which formed the folding | returning part was fixed to the lower side of the side part of the ready-made pile for bottom parts, and the ready-made pile for bottom parts was excavated hole An installation method has been proposed in which the pipe for heat exchange is sequentially drawn out and constructed on the ground side while being lowered along the side of the pile body.

  If it does in this way, construction will become easy only by preparing the wound heat exchange tube material as a reciprocating pair, but the installation is made to sink in the excavation hole while rotating this ready-made pile for the bottom. In adopting the method, the heat exchanging pipe material is wound around the outer peripheral surface of the bottom-made ready-made pile with the rotation of the ready-made pile for the bottom. Therefore, there is a problem that it is not suitable for the installation method of the ready-made pile for the bottom by rotating subsidence in which the heat exchange pipe is installed along the side of the pile body while the ready-made pile for the bottom is rotated in the excavation hole. is there.

  The present invention was made in order to solve the conventional problems as described above. A pile body can be sunk in the same manner as general pile construction, and it extends upward along the upper pile. Fix the pipe for heat exchange medium supply and the pipe for heat exchange medium removal on the upper side, so that it will not be twisted by rotation, and remove the supply pipe and the extraction pipe on the ground after construction. The purpose of the present invention is to provide a rotating jig for heat exchange piles that can be easily performed.

  In order to achieve the above object, the invention according to claim 1 of the present application is directed to a heat exchanging pile in which a pipe for a heat exchanging medium such as an antifreeze solution extends in the longitudinal direction of the pile around the outer periphery of the existing pile, and the head of the pile is on the ground surface. This is a hiring-pile rotating jig used when installing in a drilling hole excavated by an earth auger machine so as to be subordinate, and has a diameter larger than the diameter of the upper pile and was provided at the head of the upper pile U-shaped extending downward from the pile head of the heat exchanging pile, comprising a rotating cap provided with an engaging groove that can be attached and detached, and a rotating rod that connects the rotating cap and the rotary drive shaft of the earth auger machine A U-shaped tube fixing portion for fixing the vicinity of the upper end portions of the heat exchange medium supply tube and the heat exchange medium take-out tube of the mold tube is provided in the rotation rod portion extending upward from the rotation cap. It is a rotating jig for heat exchange piles.

  And in order to achieve said objective, the device which concerns on Claim 2 of this application fixes the vicinity of the upper end part of the pipe | tube for the heat exchange medium supply of the said U-shaped pipe | tube, and the pipe | tube for heat exchange medium extraction, respectively. The rotary jig for a heat exchanging pile according to claim 1, wherein a U-shaped pipe fixing portion is provided in a Yatsuko portion extending upward from the rotary cap.

  Since the rotating jig for a heat exchanging pile according to the present invention is configured as described above, the heat exchanging medium can be used even when the heat exchanging pile is submerged to a predetermined position in a drilling hole while rotating. The upper part of the supply pipe and the heat exchange medium take-out pipe are not wrapped around the heat exchange pile or rotating jig and do not get in the way of installation work or twisted by the rotation of the heat exchange pile and rotating jig. .

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings. Figure 1 is a pile body having a enlarged diameter portion 2 to the distal end portion constituting the heat exchanger piles A _1. Thus, the pile body which has the enlarged diameter part 2 in the front-end | tip part is called ST pile (JIS A5373), and the outer diameter of the enlarged diameter part 2 of a front-end | tip part is a pile body which continues above this enlarged diameter part 2. The outer diameter of one shaft portion 3 is about 100 mm to 200 mm larger.

  This ST pile is used as a lower pile, and is advantageous in terms of bearing power because the closed cross-sectional area of the tip is large. As the structure of this ST pile, there are a PHC pile, a PRC pile, etc., and there is also a structure in which a groove in the circumferential direction of the pile is provided in the enlarged diameter portion as a special shape of the ST pile. Can also be used. In addition, the same effect is produced even if a short node pile is used as the lower pile instead of the ST pile.

  4 is a U-shaped tube installed in close contact with the outer peripheral surface of the shaft portion 3 of the pile body 1 and extends in the longitudinal direction of the pile so that a heat exchange medium such as antifreeze can be circulated in the vertical direction of the pile body 1. A configuration in which a pair of pipes composed of a heat exchange medium supply pipe 4A and a heat exchange medium take-out pipe 4B are connected in a U shape via a joint member 4C at a folded portion at the lower end thereof. belongs to.

  The U-shaped tube 4 that is a tube material for the heat exchange medium may be made of resin, metal, or metal reinforced resin as long as it is light, durable, and flexible. In the examples, a commercially available product “U-Polypi” (manufactured by INOAC Corporation) made of high-density polyethylene (PE100) was used.

  Reference numeral 5 denotes a fixed band of the U-shaped tube 4 attached to the shaft portion 3 on the tip side of the pile. The fixed band 5 attached to the boundary shaft portion with the enlarged diameter portion 2 and a heat exchange medium such as an antifreeze liquid are piled. A joint member 4 </ b> C at the tip of the U-shaped tube 4 extending in the longitudinal direction of the pile so as to circulate in the vertical direction of the body 1 is connected via a lead-in wire 6.

  In this embodiment, four U-shaped tubes 4 are arranged around the outer periphery of the shaft portion 3 of the pile body 1 and arranged at intervals of 90 degrees in the pile circumferential direction. The portion is connected to the fixing band 5 via the lead-in wire 6 at the joint member 4C. However, an arbitrary number of the U-shaped tubes 4 may be mounted at arbitrary angular intervals.

  7A and 7B are positioning members for the U-shaped tube 4 and are attached to a ring-shaped band 7 which is attached to the shaft portion 3 of the pile body 1 having the enlarged-diameter portion 2 at the tip portion and wound around the outer periphery thereof. The positioning members 7A and 7B fix the heat exchange medium supply pipe 4A and the heat exchange medium take-out pipe 4B constituting the U-shaped pipe 4 apart from each other. As a result, the short circuit does not occur between the heat exchange medium supply pipe 4A and the heat exchange medium extraction pipe 4B.

  The material of the ring-shaped band 7 and the positioning members 7A and 7B is determined according to the material of the U-shaped tube 4 used. In the embodiment, the same high-density polyethylene material as the material of the U-shaped tube 4 is used, and the positioning members 7A and 7B mounted on the surface of the band 7 that is wound around the outer periphery of the shaft portion 3 are fixed. The U-shaped tube 4 is composed of one-touch mounting type concave projections to which the heat exchange medium supply tube 4A and the heat exchange medium take-out tube 4B can be mounted.

  Reference numeral 8 denotes a temperature measurement sensor attached to the fixed band 5. The other end of a lead wire (not shown) whose one end is fixed to the temperature measurement sensor 8 is for taking out the heat exchange medium of the U-shaped tube 4. This is extended to the pile head of the pile body 1 along the pipe 4B, and the geothermal temperature in the vicinity of the fixed band 5 can be measured at the ground part.

FIG. 2 shows the heat exchange pile A _{2 according} to the second embodiment of the present invention and its installation state. In the heat exchanging pile A ₂ shown in the second embodiment, the intermediate pile 10 and the upper pile 11 are respectively placed on the heat exchanging pile A _{2 serving} as a lower pile using a non-welded joint portion 9 as a connecting method of the pile. Connected. In this heat exchange pile A ₂ , unlike the heat exchange pile A ₁ of the first embodiment, the band 7 is not used as a positioning member of the U-shaped tube 4, and the positioning member 7 A, 7B is directly attached.

Specifically, in the case of the first embodiment in which the heat exchange medium supply pipe 4A and the heat exchange medium extraction pipe 4B of the U-shaped pipe 4 can be fixed to the outer peripheral surface of the non-welded joint member 9, respectively. Similar positioning members 7A and 7B, that is, a structure having a one-touch mounting type concave projection, and by pressing and fitting the tubes 4A and 4B for heat exchange medium into the concave projection, respectively, Both pipes 4A and 4B are spaced apart and fixed to pile bodies A ₂ , 10 and 11 respectively. Other construction procedures are the same as those in the first embodiment.

FIG. 3 shows a construction procedure of the heat exchange piles A ₁ and A ₂ shown in the first and second embodiments shown in FIGS. 1 and 2. Heat exchange piles A ₁ and A ₂ having the above-described configuration are prepared in advance at a factory or a site. Other than the procedure for attaching the U-shaped pipe 4 to the pile body 1, it is the same as the construction procedure of the tip enlarged rooting method, and there is no particular change.

First, in the heat exchange piles A ₁ and A ₂ , the excavation hole 12 having a diameter corresponding to the pile diameter of the enlarged diameter portion 2 is excavated to a predetermined depth as shown in FIG. At this time, an enlarged hole 13 whose diameter is increased by a predetermined length is excavated at the tip of the excavation hole 12. Next, a predetermined amount of the root-setting liquid 14 is filled in the enlarged root-sealed portion of the enlarged hole 13 and a predetermined amount of the peripheral fixing liquid 15 is filled in the pile peripheral portion of the excavation hole 12 above the enlarged hole 13.

Thereafter, as shown in FIG. 3 (b), the heat exchanging piles A ₁ and A ₂ to be the lower piles are built in the excavation hole 12, and at this time, the four sides of the heat exchanging piles A ₁ and A ₂ The U-shaped tube 4 attached to the pipe is arranged in four directions so as to be retractable so as not to obstruct the construction. For example, when the heat exchanging piles A ₁ and A ₂ are rotated and set in the excavation hole 12, the rotating cap 16 is attached to the rotating rod 17 as shown in FIG. The U-shaped tube 4 may be bundled around and the U-shaped tube 4 and the piles A ₁ and A ₂ may be rotated together.

  Next, when connecting piles by welding or the like, welding work is performed so as not to damage the pipe material, and after connection, the upper pile is set along the pipe body around the pipe body. If necessary, positioning members 7A and 7B of the U-shaped pipe 4 are also attached to the middle pile 10 and the upper pile 11, so that the heat exchange medium supply pipe 4A and the heat exchange medium take-out pipe 4B are mutually connected. Install so as not to touch.

  After the connection piles 10 and 11 having a predetermined length are thus placed in close contact with the U-shaped tube 4 and positioned (see FIG. 3B), as shown in FIG. Each of 4A and the pipe 4B for taking out the heat exchange medium is covered with a protective pipe 18 from the pile head 21 to the ground surface part G and backfilled, and a pile in another place is constructed. After the pile construction at all positions is completed, the earth and sand up to the depth below the footing is excavated (root cutting), and concrete is placed to construct the footing 19. And the front-end | tip part of the U-shaped pipe | tube 4 which protruded from the surface part G is mutually connected by the connection unit 20. FIG.

  FIG. 6 illustrates a method for treating the tip of the U-shaped tube 4. The U-shaped tube 4 is covered and backfilled with a protective tube 18 from the pile head 21 to the ground surface G, and the heat exchange medium supply tube 4A and the heat exchange medium take-out tube 4B are connected by the connection unit 20, respectively. After completing the pile construction at all positions, excavate the soil to the depth below the footing (root cutting) and place footing concrete.

  However, depending on the construction site, the pile head position may be several meters below the surface part G. In such a case, as shown in FIG. 4, a gyro-type annular member 23 is attached to the rotary rod 17 that connects the rotary drive shaft 28 of the auger motor 22 and the rotary cap 16, and extends upward along the upper pile 11. The heat exchange medium supply pipe 4 </ b> A and the heat exchange medium take-out pipe 4 </ b> B of the letter-shaped pipe 4 are fixed by the fixing portions 23 </ b> A and 23 </ b> B of the annular member 23. Alternatively, as shown in FIG. 5, the rotary rod 17 is attached with a yatco 24 having a diameter close to a pile, such as a hollow, and the upper portions of the pipes 4A and 4B are fixed by a pipe fixing band 25 wound around the outer periphery of the yatco24. To do.

  As described above, the heat exchange medium supply pipe 4A and the heat exchange medium extraction pipe 4B of the U-shaped pipe 4 extending upward along the upper pile 11 are fixed at the upper end portion 4D, respectively, so that they are twisted by rotation. There is an advantage that the pipes 4A and 4B can be easily removed from the ground part after construction.

It is an explanatory side view of the state where the heat exchanging pile and the upper pile connected thereto were set in the excavation hole. It is an explanatory side view of the state where another heat exchange pile and the upper pile connected on it were sunk in the excavation hole. It is explanatory side view which shows the state of the construction process which sinks a heat exchange pile and the upper pile connected on it in an excavation hole. When the pile head position of the heat exchange pile is below the ground surface, it is a diagram showing the method of sunk to a predetermined position using the rotation jig for heat exchange pile according to the present invention, and the upper end of the U-shaped pipe is rotated It is a side view of the state fixed to the annular member with which the rod was mounted | worn. FIG. 5 is a diagram showing a method of sinking to a predetermined position using a rotating jig for a heat exchanging pile according to another embodiment of the present invention when the pile head position of the heat exchanging pile is below the ground surface, and a U-shaped pipe It is a side view of the state which fixed the upper end part of this to the Yatsuko part extended upward from a rotation cap. It is a partial expanded sectional explanatory view which shows the processing method of the front-end | tip part of the U-shaped pipe | tube which protrudes from a pile head to a surface part.

A ₁ , A ₂ heat exchange pile 1 pile body 2 expanded part 3 shaft 4 U-shaped pipe 4A heat exchange medium supply pipe 4B heat exchange medium take-out pipe 4C joint part 4D upper end part 5 fixing band 6 Pull-in wire 7 Band 7A, 7B Positioning member 8 Temperature measurement sensor 9 Non-welded joint part 10 Middle pile 11 Upper pile 12 Drilling hole 13 Expansion hole 14 Root-fixing liquid 15 Peripheral fixing liquid 16 Rotating cap 17 Rotating rod 18 Protective tube 19 Footing 20 Connection unit 21 Pile head 22 Auger motor 23 Annular member 23A U-shaped tube fixing part 24 Yatco 25 Pipe fixing band 26 Engaging part 27 Engaging groove 28 Rotating drive shaft

Claims (2)

  When installing a heat exchanging pile in which the pipe material for heat exchange medium such as antifreeze liquid is extended in the longitudinal direction of the outer circumference of the existing pile in an excavation hole excavated with an earth auger machine so that the pile head is below the surface A rotation cap having a diameter larger than the diameter of the upper pile and having an engagement portion provided on the pile head of the upper pile and a detachable engagement groove, and the rotation cap And a rotating rod connecting the rotary drive shaft of the earth auger machine, and the upper end of the heat exchange medium supply pipe and the heat exchange medium take-out pipe of the U-shaped pipe extending downward from the pile head of the heat exchange pile A rotary jig for a heat exchanging pile, comprising a U-shaped tube fixing portion for fixing the vicinity of each portion in the rotating rod portion extending upward from the rotating cap.   The U-shaped tube fixing portion that fixes the vicinity of the upper end portion of the heat exchange medium supply tube and the heat exchange medium take-out tube of the U-shaped tube is provided in a Yatco portion that extends upward from the rotating cap. The rotation jig for heat exchange piles according to claim 1 characterized by things.

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