JP6567350B2 - Ready-made pile with heat exchange pipe - Google Patents

Description

  The present invention relates to a ready-made pile with a heat exchange pipe that is used when recovering underground heat to the ground via a fluid flowing in the heat exchange pipe.

Various devices have been proposed in which a heat exchange pipe is submerged in a pile hole and buried in a deep position in the ground to recover the heat in the ground.
For example, a heat exchange pipe spirally wound on the outer periphery of a steel pipe (Patent Document 1), a device for embedding a heat exchange pipe in a concrete foundation pile body (Patent Document 2), a heat exchange pipe There has also been a proposal of using H-shaped steel as a weight member for burying and disposing a heat exchange pipe between flanges (Patent Document 3).

JP 2005-188866 A JP 2005-69507 A JP 2014-31914 A

In Patent Document 1, there is a risk of damaging the pipe when embedding the steel pipe, and a pipe having a certain degree of strength has to be used. Moreover, in patent document 2, although there is no possibility of damaging a pipe, there existed a problem that the efficiency of heat exchange was not good compared with the case where a pipe is exposed. Moreover, in patent document 2, the foundation pile assumes the embedding by press-fit, and there is a possibility of producing a so-called high stop that cannot be embedded to the design position depending on the underground condition (a state in which the upper end of the foundation pile protrudes greatly from the ground) In this case, there was a problem that the length of the heat exchange pipe to be buried in the ground could not be secured.
Further, in Patent Document 3, since there is a flange, the pipe for heat exchange can be protected to some extent. However, since the outer diameter of the pipe is generally smaller than the distance between the flanges, there is a lot of space around the pipe, There was also a burden of excavated soil acting on the pipe surface. Moreover, since the lower end of the weight is open, the influence of excavated soil from the lower surface side could not be ignored.

  In the present invention, the housing groove is provided on the outer peripheral surface of the ready-made pile base, and the heat exchange pipe is accommodated in the housing groove.

That is, this invention is a ready-made pile with a heat exchange pipe characterized in that a heat exchange pipe is installed in the length direction of the ready-made pile base having a predetermined length and a cross section and is configured as follows.
(1) as concrete of the prefabricated pile base a solid cross-section, the outer surface of the prefabricated pile base, to form a first yield volume grooves and the second receiving groove over the vertical length.
(2) communicated via a communicating portion between the first accommodating groove and the second receiving groove.
(3) a substantially U-shaped heat exchange pipe comprising a first linear portion and a bent portion second linear portion, said first straight portion to the first yield Yomizo, the said second linear portion first The bent portion was accommodated in the communicating portion in the two accommodating grooves.
(4) The communication portion was a groove opened on the bottom surface of the ready-made pile base, and a closing plate was fixed to the bottom surface of the ready-made pile base to close the opening of the communication portion.

Further, another invention is a ready-made pile with a heat exchange pipe, characterized in that a heat exchange pipe is installed in the length direction of the ready-made pile base having a predetermined length and a cross section and configured as follows. .
(1) The ready-made pile base is made of concrete having a solid cross section, and first and second receiving grooves are formed on the outer surface of the ready-made pile base over the entire length.
(2) The first accommodation groove and the second accommodation groove are communicated with each other via a communication portion.
(3) A substantially U-shaped heat exchange pipe composed of a first straight portion, a second straight portion, and a bent portion, the first straight portion as the first receiving groove, and the second straight portion as the second. The bent portion was accommodated in the communicating groove in the accommodating groove.
(4) The communication portion was a groove opened on the bottom surface of the ready-made pile base, and a protective pipe was fitted to the outer periphery of the bent portion of the heat exchange pipe.

Moreover, it is the ready-made pile with a heat exchange pipe characterized by having comprised as follows in the above.
(1) An accommodation groove was formed on each of two symmetric diameter side surfaces of a prefabricated pile body having a substantially square cross section, and the accommodation groove was formed in a substantially trapezoidal cross-section with a bottom narrower than the opening.
(2) The first straight portion and the second straight portion of the heat exchange pipe were accommodated in the bottom portions of the two accommodation grooves, respectively.
(3) A protective pipe was fitted on the outer periphery of the bent portion of the heat exchange pipe.

  In the present invention, the first storage groove and the second storage groove are formed on the outer surface of the ready-made pile base, and the first straight portion and the second straight portion of the heat exchange pipe are stored. The load can be reduced without damaging the pipe. Moreover, since the linear part of a heat exchange pipe touches directly in the ground at the time of use by heat exchange, heat exchange efficiency can be improved. Also, if there is a risk of high-stopping during the laying of ready-made piles, bend the upper end of the heat exchange pipe and place it around the ready-made pile underground to reduce the required burial length of the heat exchange pipe. It can be secured.

It is a ready-made pile base used for implementation of this invention, (a) is a top view, (b) is a front view, (c) is a right side view, (d) represents an AA end view. It is a ready-made pile base used for implementation of this invention, (a) is an enlarged bottom view, (b) represents BB sectional drawing of Drawing 1 (a). In the embodiment of the present invention, (a) is a plan view, (b) is a front view, (c) is a right side view, (d) is a DD end view, and (e) is a CC end view. .

Embodiments of the present invention will be described with reference to the drawings.

1. Configuration of ready-made pile base 20

(1) from the plane 6 to the bottom 7 by a length L _0, constituting a quadrangular pillar 1 of a square cross-section of one side L _1. The quadrangular column base 1 is tapered at the corners of the four corners. Here, the length L ₀ is, for example, 5 m, 5.5 m, 8 m, and the like, and is usually appropriately selected from about 3 m to 10 m, but is arbitrary. The length _{L 1} of one side, for example, will form in about 20 cm, it is optional.

(2) parallel the square pillar 1 (corresponding) first receiving groove 11 of a length _{L 0} direction on the side surfaces 2 and 3, to form a second accommodation groove 12 (FIG. 1 (a) (b)). Each housing groove 11, 12 is formed from the plane 6 to the bottom surface 7. The opening (fourth surface side of the rectangular column 1) 13 is wide in the width L _2, the bottom 14 (four center side of the rectangular column 1) is a narrow trapezoidal cross-section with a width L _3, and the depth (height of the trapezoid length corresponding to) is formed in _{L 4} (FIG. 2 (a)). A remaining portion in which the first accommodation groove 11 and the second accommodation groove 12 are formed between the side surface 2 and the side surface 3 is referred to as a connecting portion 16.

(3) In the direction of the length L ₀ of the quadrangular prism body 1, the connecting portion 16 is formed with a semicircular cross section from the bottom surface 7 to connect the first receiving groove 11 and the second receiving groove 12. To do. Screw holes 18 and 18 are formed at the four corners of the bottom surface 7 of the rectangular column 1 (FIG. 2A).

(4) The ready-made pile base | substrate 20 is comprised by the above shapes (FIG. 1, FIG. 2). The ready-made pile base 20 is made of concrete, and has structural rebars 21 and 21 embedded along the sides (side surfaces) 4 and 5, and the strips 22 on the outside of the three structural rebars 21 and 21 on both sides 4 and 5. Is arranged. Moreover, the connection reinforcing bar 23 which connects the structural reinforcing bars 21 and 21 of both sides 4 and 5 is arrange | positioned for every predetermined length (FIG. 2 (a)).

2. Configuration of heat exchange pipe 30

(1) heat exchange pipe 30 is a pipe for heat exchange diameter D ₁ (e.g., polyethylene) was bent into a U-shape, go pipe (first linear portion) 31 and went back tube (second linear portion ) 32 and a U-shaped bent portion 33 connecting the two pipes 31 and 32 (FIG. 3E). Further, the outer periphery of the U-shaped bent portion 33 may be covered with a protective pipe 35 of the outer diameter _{D 2} of the larger diameter than the diameter _{D 1} (FIG. 3 (c) (e) ( f), the chain line shown 35). The protective pipe 35 covers the U-shaped bent portion 33 and the vicinity of the U-shaped bent portion 33 with the outgoing pipe 31 and the return pipe 31.
The diameter _D 1 _{<L 3,} the diameter _D 1 _{<L 4,} in is formed, and the diameter _D 2 _{<L 3,} the diameter _D 2 _{<L 4,} in form. Even if the protective pipe 35 protrudes slightly from the housing grooves 11 and 12, the safety of the outgoing pipe (first straight part) 31 and the return pipe (second straight part) 32 can be ensured, so that the diameter D ₂ ≧ L ₃ , The diameter D ₂ ≧ L ₄ can also be satisfied.

(2) Normally, the pipe and the protective pipe 35 are bent together in a state where the intermediate part of the straight pipe is covered with the protective pipe 35, and the outgoing pipe 31 with the protective pipe, the return pipe 32, and the U-shape are bent. The bent portion 33 is integrally formed.

3. Ready-made pile 40 with heat exchange pipe

(1) The outgoing pipe 31 of the heat exchange pipe 30 with the protective pipe 33 is accommodated in the first accommodating groove 11, the return pipe 32 is accommodated in the second accommodating groove 12, and the U-shaped bent part 33 is accommodated in the communicating part 17 (FIG. 3). (A), (c) (e)). A closing plate 35 having substantially the same cross-sectional shape as that of the rectangular pillar 1 and corresponding to the screw holes 18 and 18 and having through holes 26 and 26 formed at the four corners is formed. 7, bolts 27 are screwed from the through holes 26 toward the screw holes 18, and the closing plate 35 is fixed to the ready-made pile base 20.

(2) The ready-made pile 40 with a heat exchange pipe is comprised as mentioned above (FIG. 3).
Since the diameter D ₁ <L ₃ , the diameter D ₁ <L ₄ , and the diameter D ₂ <L ₃ , the diameter D ₂ <L ₄ , the heat exchange pipe 30 is in plan view, It does not protrude from the ready-made pile base 20 (FIGS. 3A and 3B).

(3) Excavate a pile hole in the ground, or bury the ready-made pile 40 with a heat exchange pipe directly if it is soft ground. In this case, since the closing plate 35 is provided and the outgoing pipe 31 and the return pipe 32 of the heat exchange pipe 20 do not protrude outward from the housing grooves 11 and 12, the heat exchange pipe 30 may be damaged during the embedment, There is no load. Further, when the U-shaped bent portion 33 of the heat exchange pipe 30 is covered with the protective pipe 35, the heat exchange pipe 20 can be protected more reliably.
In addition, when there is a possibility that a high stop may occur due to an unexpected underground obstacle or rock during the embedding, the ground near the ground is spread around the ready-made pile base 20, and the first and second storage grooves The heat exchange pipes 31 and 32 can be removed from the wires 11 and 12 and bent to be embedded in the expanded ground. Therefore, it is possible to secure the heat exchange pipe 20 having a necessary length embedded in the ground.

(4) The outgoing pipe 31 and the return pipe 32 of the heat exchange pipe 30 exposed on the ground are connected to a heat exchange system (a heat recovery device, a circulation pump, etc., not shown), and fluid is transferred into the heat exchange pipe 30. By circulating (for example, antifreeze), underground heat can be recovered on the ground. At this time, the outgoing pipe 31 and the return pipe 32 of the heat exchange pipe 30 are accommodated in the accommodating grooves 11 and 12 in which the opening portion 13 is wider than the bottom portion 14 and directly contact with the ground. Can receive.

(5) In addition, this ready-made pile 40 with a heat exchange pipe is used as a foundation pile of a normal low-rise building (house etc.) by the structure of the ready-made pile base 20 to be used, and performs heat exchange with the ground. It can also be used exclusively for heat exchange with the ground (without bearing the support of the ground structure).

4). Other embodiments

(1) Although the first accommodation groove 11 and the second accommodation groove 12 have a trapezoidal cross section, if the heat exchange pipe 30 can be accommodated without protruding from the outer periphery of the quadrangular prism body 1, the cross sectional shape is semicircular, rectangular or triangular. Other shapes can also be used (not shown).

(2) Moreover, in the said embodiment, although the one system heat exchange pipe 30 was embed | buried in the 1st accommodation groove | channel 11 and the 2nd accommodation groove | channel 12, the 1st accommodation groove | channel 11, the 2nd accommodation groove | channel 12, and the communication part 17 of If the cross-sectional area is increased, two or more heat exchange pipes 30 can be embedded (not shown).

(3) In the above embodiment, the housing grooves are formed on the corresponding two side surfaces 2 and 3, but the third housing groove and the fourth housing groove can also be formed on the other side surfaces 4 and 5 (FIG. Not shown). In this case, it is also possible to provide a communication portion that connects the third accommodation groove and the fourth accommodation groove, and to embed the heat exchange pipes 30 and 30 in two systems on the first and second accommodation groove sides. it can.

(4) Moreover, in the said embodiment, although the ready-made pile base | substrate 20 was comprised from the square pillar base | substrate 1, it can also be set as other shapes, such as a cylinder (not shown).

(5) Moreover, in the said embodiment, although the 1st accommodation groove | channel 11 and the 2nd accommodation groove | channel 12 were formed in the full length from the plane 6 to the bottom face 7, it does not penetrate the bottom face 7, but is a communication part which is not exposed to the bottom face 7. 17 can also be formed (not shown). In this case, the closing plate 35 may be unnecessary.

DESCRIPTION OF SYMBOLS 1 Square pillar body 2-5 Side surface 6 Plane 7 Bottom surface 11 1st accommodating groove 12 2nd accommodating groove 13 Opening part (accommodating groove)
14 Bottom (receiving groove)
16 connecting part 17 communicating part 18 screw hole 20 ready-made pile base 21 structural rebar 22 band rebar 23 connecting rebar 30 heat exchange pipe 31 outgoing pipe (first straight part)
32 Return pipe of heat exchange pipe (second straight section)
33 U-shaped bent portion 35 of heat exchange pipe Protective pipe 40 Ready-made pile with heat exchange pipe

Claims (3)

A pre-made pile with a heat exchange pipe, characterized in that a heat exchange pipe is installed in the length direction of the pre-made pile base having a predetermined length and cross section and is configured as follows.
(1) as concrete of the prefabricated pile base a solid cross-section, the outer surface of the prefabricated pile base, to form a first yield volume grooves and the second receiving groove over the vertical length.
(2) communicated via a communicating portion between the first accommodating groove and the second receiving groove.
(3) a substantially U-shaped heat exchange pipe comprising a first linear portion and a bent portion second linear portion, said first straight portion to the first yield Yomizo, the said second linear portion first The bent portion was accommodated in the communicating portion in the two accommodating grooves.
(4) The communication portion was a groove opened on the bottom surface of the ready-made pile base, and a closing plate was fixed to the bottom surface of the ready-made pile base to close the opening of the communication portion. A pre-made pile with a heat exchange pipe, characterized in that a heat exchange pipe is installed in the length direction of the pre-made pile base having a predetermined length and cross section and is configured as follows.
(1) as concrete of the prefabricated pile base a solid cross-section, the outer surface of the prefabricated pile base, to form a first yield volume grooves and the second receiving groove over the vertical length.
(2) communicated via a communicating portion between the first accommodating groove and the second receiving groove.
(3) a substantially U-shaped heat exchange pipe comprising a first linear portion and a bent portion second linear portion, said first straight portion to the first yield Yomizo, the said second linear portion first The bent portion was accommodated in the communicating portion in the two accommodating grooves.
(4) The communication portion was a groove opened on the bottom surface of the ready-made pile base, and a protective pipe was fitted to the outer periphery of the bent portion of the heat exchange pipe. The ready-made pile with a heat exchange pipe according to claim 1 or 2, wherein the pile is configured as follows.
(1) An accommodation groove was formed on each of two symmetric diameter side surfaces of a prefabricated pile body having a substantially square cross section, and the accommodation groove was formed in a substantially trapezoidal cross-section with a bottom narrower than the opening.
(2) The first straight portion and the second straight portion of the heat exchange pipe were accommodated in the bottom portions of the two accommodation grooves, respectively.
(3) A protective pipe was fitted on the outer periphery of the bent portion of the heat exchange pipe.

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