JP3163849U - Heat exchange pile and its connection structure - Google Patents

Abstract

[PROBLEMS] To prevent damage to pipe material during construction by protecting the outer periphery of the pipe material with the enlarged diameter part while the pipe material can be easily attached to the outer periphery of the pile body even with the pile body having the enlarged diameter part. Provide heat exchange piles that can. When a pipe material 4 in which a heat exchange medium flows is brought into close contact with the outer periphery of a shaft portion 3 of a pile body 1 having a plurality of enlarged diameter portions 2 and wound in a spiral shape, the heat exchange of the pipe material 4 is also achieved. The medium feed pipe portion 4A and the return pipe portion 4B are extended in the pile length direction through the notches 5A and 5B provided in the enlarged diameter portion 2 to constitute a heat exchange pile. [Selection] Figure 1

Description

The present invention relates to a heat exchange pile that is buried in the ground and absorbs geothermal heat, and a connection structure thereof.

  Conventionally, it is known to use a ready-made pile used as a foundation of a building as an underground heat exchanger. Specifically, inventions of a method of filling water (antifreeze) as a heat exchange medium in a hollow part of a ready-made pile and repeating water intake / drainage (for example, Patent Documents 1 and 2), and a pipe in a hollow part of a ready-made pile Invention of a system for inserting and circulating a heat exchange medium (for example, Patent Documents 3 and 4), or an invention of a system for circulating a heat exchange medium by winding a tube around the outer periphery of a ready-made pile (for example, Patent Documents 5 and 6) ) Etc.

Utility Model Registration 2528737 JP 2005-336815 A JP-A-11-336008 JP 2003-148079 A JP 2009-85556 A JP 2003-206528 A

However, in the system in which the hollow portion of the ready-made pile is filled with a heat exchange medium such as water, there is a disadvantage that the heat exchange medium leaks to the surrounding ground when the pile body is damaged by an earthquake or the like. Moreover, in the system which circulates a heat exchange medium in the pipe | tube in the hollow part of a ready-made pile, since it is indirect heat exchange, there exists a problem that heat exchange efficiency is not good.

  On the other hand, the method of wrapping pipe material around the outer circumference of the ready-made pile and circulating the heat exchange medium can be expected to improve the heat exchange efficiency because the pipe material is in direct contact with the surrounding ground, but the pipe material is outward from the outer peripheral surface of the ready-made pile. Since it is arranged in a protruding state, there is a high possibility that the pipe material will be damaged by contacting with the surrounding ground or the like during construction. And if it was damaged, the inconvenience that the heat exchange medium leaked out also occurred, and the construction was difficult.

  The present invention has been made to solve the above problems, and in the device according to claim 1 of the present application, a heat exchange medium is provided around the outer periphery of the shaft portion of the pile body having a plurality of enlarged diameter portions. When the flowing pipe material is brought into close contact and wound in a spiral shape, the feed pipe portion and the return pipe portion of the heat exchange medium of the pipe material are respectively extended in the pile length direction through the notch portions provided in the enlarged diameter portion. It is set as the structure which circulates the said heat exchange medium in the up-down direction of the pile through the said feed pipe part and the return pipe part, It is set as the heat exchange pile characterized by the above-mentioned.

  Further, in the invention according to claim 2 of the present application, the pipe material in which the heat exchange medium flows is closely attached to the outer periphery of the shaft portion of the pile body having a plurality of enlarged diameter portions while meandering in the pile length direction and wound in the pile circumferential direction. In addition, the feed pipe part and the return pipe part of the heat exchange medium of the pipe material are respectively extended in the pile length direction through notches provided in the enlarged diameter part, and the feed pipe part and the return pipe part The heat exchanging pile is characterized in that the heat exchanging medium is circulated in the vertical direction of the pile.

  Further, in the invention according to claim 3 of the present application, the pipe material is a heat exchange pile characterized by being installed around the outer periphery of the shaft portion between a plurality of enlarged diameter portions. The pile body having the enlarged diameter portion is a PHC pile with a node or a PRC pile with a node.

  The invention according to claim 5 of the present application is a heat exchanging pile characterized in that the pipe is a flexible pipe made of resin, metal reinforced resin or metal. The invention which concerns on 6 connects the said heat exchange pile with an upper pile via an upper end axial part, and connects the feed pipe part and return pipe part of the heat exchange medium of the said pipe material by a feed port and a return port. It is the connection structure of the heat exchange pile characterized by the feature.

  In the device according to claims 1 and 2 of the present application, a pipe material in which a heat exchange medium flows is closely attached to the outer periphery of a shaft portion of a pile body having a plurality of enlarged diameter portions, or is wound spirally, or meanders in the pile length direction. In addition, when it is closely attached and wound in the circumferential direction of the pile, the feed pipe portion and the return pipe portion of the heat exchange medium of the pipe material are respectively extended in the pile length direction through the notch portions provided in the enlarged diameter portion. In addition, since the heat exchange medium is circulated in the vertical direction of the pile through the feed pipe portion and the return pipe portion, the pipe material can be used in close contact with the outer periphery even with a prefabricated pile having an enlarged diameter portion such as a joint pile. It can be installed easily and the pipe material can be installed without being damaged during construction.

  Here, since the pipe material is wound in a spiral shape, the pipe material and the pile body are excellent in adhesion, and the pipe material is protected by the enlarged diameter portion, so that the pipe material can be prevented from being damaged during construction. Moreover, since it is the structure which makes it closely_contact | adhere while making it meander in a pile length direction and winds in a pile circumferential direction, it becomes a structure where a heat exchange medium repeatedly flows through the upper and lower long pipe lines at the same depth, and it is advantageous on heat exchange efficiency.

  In the invention according to claim 3 of the present application, since the pipe material is installed around the shaft portion between the plurality of enlarged diameter portions, the heat exchange medium exchanges heat with the surrounding ground at each pipe material portion. And the heat exchange efficiency is further improved.

  In the device according to claim 4 of the present application, the pile body having the enlarged-diameter portion is configured to be a PHC pile with a node or a PRC pile with a node, so that it can be applied to any ready-made pile with a node and has a degree of freedom. When enlarged, not only a part of the node part (expanded diameter part) of the pile body with a node is cut off, but the pile material supporting force evaluated at the shaft part is not adversely affected.

  In the device according to claim 5 of the present application, since the pipe material is a flexible resin, metal reinforced resin, or metal flexible pipe, the pipe material is attached in advance at the factory or in the field. Even when a pipe is attached, it is easy to make the pipe formed in a spiral or meandering shape close to the shaft because the pipe is flexible, and it is installed on the pile body without damaging the pipe. It is possible to provide a heat exchange pile with improved work efficiency and high reliability.

  In the device according to claim 6 of the present application, the heat exchange pile is connected to the upper pile via the upper end shaft portion, and the feed pipe portion and the return pipe portion of the heat exchange medium of the pipe material are connected by a feed port and a return port. Since it is the connection structure of the heat exchange pile characterized by connecting, a pipe material can be smoothly connected along the axial part of the pile body which has an enlarged diameter part.

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings. In FIG. 1, A1 is a heat exchange pile according to the present invention, a pile body 1, a pipe member 4 (described later) installed on a shaft portion 3 of the pile body 1 between the enlarged diameter portions 2 and 2 formed on the pile body 1. A pair of notches 5A and 5B extending in the pile length direction are formed in the enlarged diameter portion 2 immediately above where the pipe material 4 is installed.

  As described above, a pile having a configuration in which a plurality of enlarged diameter portions 2 and 2 are provided at predetermined intervals in the pile length direction of the pile body 1 is called a so-called knot pile (JIS A5373-2010). In terms of the structure, there are a PHC pile with a node and a PRC pile with a node, but the pile with a node that can be used in the present invention may be a pile with a PHC pile or a PRC pile.

  Although the diameter-expanded part (node part) 2 of the pile body 1 is normally made into the structure formed in the axial part 3 of a pile at intervals of 1 m, each node part 2 and 2 of this pile with a node has no reinforcement reinforcement. Therefore, there is no structural problem even if the notches 5A and 5B formed in the enlarged diameter portion 2 are notched to the shaft section. Further, even if a part of the node portion 2 of the pile body 1 is cut out, the pile material supporting force evaluated by the shaft portion 3 is not affected.

  4 is a pipe material installed around the outside of the shaft portion of the pile body 1, in which a heat exchange medium, for example, liquid such as tap water or antifreeze liquid flows, is used as this pipe material 4 in this embodiment. Use pipes. However, when used in a place where corrosion resistance and durability are required, a flexible pipe material such as a metal-reinforced resin pipe, copper, or stainless steel may be used.

  In the pile body 1, the pipe material 4 made of the above-described material installed on the shaft portion 3 between the enlarged-diameter portion 2 and the enlarged-diameter portion 2 is in close contact with the outer periphery of the shaft portion 3 to form a spiral shape. The one end side of the pipe material 4 is a pipe line that functions as a feed pipe portion 4A for the heat exchange medium, and the other end side functions as a return pipe portion 4B for the heat exchange medium.

  The feed pipe portion 4A and the return pipe portion 4B of the heat exchange medium are fitted into the one notch portion 5A and the other notch portion 5B formed in the enlarged diameter portion 2, respectively, so as not to contact each other. The heat exchange medium circulates in the vertical direction of the pile body 1 through the feed pipe portion 4A and the return pipe portion 4B that extend in the pile length direction through the notches 5A and 5B. Yes.

  FIG. 2 shows a second embodiment of the heat exchange pile according to the present invention. This heat exchange pile A2 is provided on the notch portions 5A and 5B of the heat exchange pile A1 shown in FIG. After passing through the part 4A and the return pipe part 4B on the other end side, the cutout parts 5A and 5B are immediately filled with a filler such as high-strength mortar, resin mortar, or resin, respectively, according to the standard shape of the knotted joint. The one filled with M is shown.

  In general, in the basic construction method using knots, cement milk is filled in the outer periphery of the pile body, so that it is not necessary to fill the notches 5A and 5B with the filler M as shown in FIG. However, since the strength of the cement milk hardened body is smaller than the strength of the pile main body, the high-strength filler M is embedded in the notches 5A and 5B in consideration of the frictional force in the ground. Further, for the purpose of fixing the tube material 4, it is conceivable that the notch portions 5 </ b> A and 5 </ b> B are not filled with the filler material and only the tube material 4 is fixed with a fastener.

  FIG. 3 shows still another embodiment of the heat exchange pile according to the present invention. In the figure, A3 is a third embodiment of the heat exchange pile according to the present invention, and is located between the pile body 1, the enlarged diameter portion 2 and the enlarged diameter portion 2 of the pile body 1, and on the shaft portion 3 of the pile body 1. It is mainly comprised from the below-mentioned pipe material 14 installed, and the notch part 5A extended in the pile length direction is similar to the thing of the said 1st Example in the enlarged diameter part 2 immediately above the pipe material 14 installed. , 5B are formed.

  The difference between the heat exchanging pile A3 of the third embodiment shown in FIG. 3 and the heat exchanging pile A1 of the first embodiment is that a tube material 14 to be described later is wound in close contact with the shaft portion 3 of the pile body 1. And it is only a difference in structure from the spiral tubular material 4 wound in close contact with the shaft portion 3 of the pile body 1, and the other configurations are the same.

  More specifically, the pipe material 14 of the heat exchange pile A3 has a configuration in which the pipe material 14 is in close contact with the shaft portion 3 of the pile body 1 while meandering in the pile length direction and wound around the pile circumferential direction. The exchange pipe 14A and the return pipe 14B of the exchange medium are respectively extended in the pile length direction through the notches 5A and 5B provided in the enlarged diameter part 2, and the pipe material is passed through the feed pipe 14A and the return pipe 14B. 14 is configured to circulate the heat exchange medium in the vertical direction of the pile.

  FIG. 4 shows a connection structure between the heat exchange pile A3 and the upper pile B of the third embodiment. In the case where the pipe material 14 is installed on the pile body 1 at the factory, the pipe material 14 cut according to the overall length of the pile body 1 is installed in the pile body 1 and the prepared heat exchange pile A3 is prepared. The connecting pipes 15A and 15B having a predetermined length are connected to the feed pipe section 14A and the return pipe section 14B of the heat exchange medium 14 by using the couplers 16A and 16B, respectively, so that they extend to the pile head of the upper pile B. To do.

  On the other hand, in the thing which installs the pipe material 14 to the pile body 1 while substituting the pile body 1 in the excavation hole on-site, the communication pipes 15A and 15B are attached via the couplers 16A and 16B in order from the lower pile. At the pile head of the upper pile B, the upper ends of the communication pipes 15A and 15B are fixed. In the illustrated embodiment, the spiral or meandering tubes 4 and 14 are arranged on the shaft portion 3 between the enlarged diameter portion 2 formed at the tip of the piles A1 to A3 and the enlarged diameter portion 2 on the upper portion thereof. However, the object of the present invention can be achieved even if the pipe members 4 and 14 are installed on the plurality of shaft portions 3 between the enlarged diameter portions 2 and 2.

It is a front fragmentary view of the heat exchange pile of the 1st example concerning the present invention. It is a front fragmentary view of the heat exchange pile of the second embodiment. It is a front fragmentary view of the heat exchange pile of the 3rd example concerning the present invention. It is the front view which abbreviate | omitted one part which shows the connection state of the heat exchange pile and upper pile which concern on a 3rd Example.

DESCRIPTION OF SYMBOLS 1 Pile body 2 Expanded diameter part 3 Shaft part 4/14 Pipe material 4A, 14A Feed pipe part 4B, 14B Return pipe part 5A / 5B Notch part 15A / 15B Communication pipe 16A / 16B Connecting tool A1 / A2 / A3 Heat exchange pile

Claims (6)

  When the pipe material in which the heat exchange medium flows is closely attached to the outer periphery of the shaft portion of the pile body having a plurality of enlarged diameter portions and wound spirally, the feed pipe part and the return pipe of the heat exchange medium of the pipe material And a portion extending in the pile length direction through a notch provided in the enlarged diameter portion, and the heat exchange medium is circulated in the vertical direction of the pile through the feed pipe portion and the return pipe portion. And heat exchange pile.   When the pipe material in which the heat exchange medium flows is in close contact with the outer periphery of the shaft portion of the pile body having a plurality of diameter-expanded portions, the pipe material is wound closely in the pile length direction and wound in the pile circumferential direction. A medium feed pipe part and a return pipe part are respectively extended in the pile length direction through notches provided in the enlarged diameter part, and the heat exchange medium is passed in the vertical direction of the pile through the feed pipe part and the return pipe part. A heat exchanging pile characterized by being configured to circulate.   The heat exchange pile according to claim 1 or 2, wherein the pipe material is installed around a shaft portion between a plurality of enlarged diameter portions.   4. The heat exchange pile according to claim 1, wherein the pile body having the enlarged diameter portion is a knotted PHC pile or a knotted PRC pile.   The heat exchange pile according to claim 1, 2, 3, or 4, wherein the pipe material is a flexible pipe made of resin, metal reinforced resin, or metal having flexibility.   The heat exchange pile according to claim 1, 2, 3, 4 or 5 is connected to an upper pile through an upper end shaft portion, and a feed pipe portion and a return pipe portion of the heat exchange medium of the pipe material are respectively connected to a feed port. A heat exchanging pile connection structure characterized by connecting with a return port.

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