JP2012077579A - Installation method of underground heat exchange tube, and reinforcement cage for the same - Google Patents

Installation method of underground heat exchange tube, and reinforcement cage for the same Download PDF

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JP2012077579A
JP2012077579A JP2010226426A JP2010226426A JP2012077579A JP 2012077579 A JP2012077579 A JP 2012077579A JP 2010226426 A JP2010226426 A JP 2010226426A JP 2010226426 A JP2010226426 A JP 2010226426A JP 2012077579 A JP2012077579 A JP 2012077579A
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heat exchange
exchange tube
reinforcing bar
rod
pipe support
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JP5480094B2 (en
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Eiji Inanaga
英治 稲永
Junji Takeuchi
淳二 竹内
Akira Kato
昭 加藤
Hiroyuki Nagai
裕之 永井
Keiichi Shinogase
恵市 篠ヶ瀬
Kazuhiro Shigeta
和拡 繁田
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Toda Corp
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Toda Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/10—Geothermal energy

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Abstract

PROBLEM TO BE SOLVED: To prevent cross sectional breakage in the conventional installation method of an underground heat exchange tube and further to solve the problem that breakage of the underground heat exchange tube is likely to occur when a reinforcement cage is inserted into a hole.SOLUTION: A rod-like or band plate-like pipeline supporting member, in which at least one of both ends in the lengthwise direction is bent in an L-shape, is fixed to a reinforcement ring for holding main reinforcements in a reinforcement cage for a foundation pile, and heat exchange tubes are disposed while vertically inserted inside one side part bent in an L-shape in the pipeline supporting member. The reinforcement cage is inserted into an excavated hole and further concrete is placed to install the underground heat exchange tubes.

Description

本発明は、建物の基礎杭を利用した地中熱交換チューブの設置方法とそれに使用する鉄筋籠に関するものである。   The present invention relates to a method for installing an underground heat exchange tube using a foundation pile of a building, and a reinforcing bar rod used therefor.

従来、地中熱を利用したヒートポンプ方式は、地中に埋設した地中熱交換チューブから放熱・採熱を行うシステムであり、空調排熱を大気に放出しないため、都市のヒートアイランド対策として有効な手段となっている。地中熱交換システムにおける地中熱交換チューブの埋設方法は、例えば、地中に孔を開けて熱交換パイプを挿入し、孔を充填するボアホール方式がある。この方式は掘削コストが嵩むので、掘削コストの削減と作業効率の向上および熱交換率の向上を目的として、建物の基礎杭を利用し、鉄筋籠の外周に設置される偏心防止用のスペーサにＵ字状のパイプを取り付けて、鉄筋籠の外周に軸方向に沿って設置するものが知られている（特許文献１参照）。   Conventionally, the heat pump system using geothermal heat is a system that dissipates and collects heat from underground heat exchange tubes buried in the ground, and does not release air-conditioning exhaust heat to the atmosphere, so it is effective as a countermeasure for urban heat islands. It is a means. As a method of burying the underground heat exchange tube in the underground heat exchange system, for example, there is a borehole method in which a hole is formed in the ground, a heat exchange pipe is inserted, and the hole is filled. Since this method increases the excavation cost, the foundation pile of the building is used for the purpose of reducing excavation cost, improving work efficiency, and improving the heat exchange rate. It is known that a U-shaped pipe is attached and installed along the axial direction on the outer periphery of a reinforcing bar (see Patent Document 1).

特開２００４−３３２３３０号公報JP 2004-332330 A

しかし、従来の地中熱交換チューブの設置方法においては、鉄筋スペーサに熱交換チューブを番線で結束して支持する方式なので、杭の鉄筋籠の挿入時に、杭主筋の結束する配筋工と熱交換チューブを取り付ける設備業者との作業が交錯し、杭の施工に時間が掛かることになる。また、杭の内部に熱交換チューブを配管した場合、杭の断面欠損になるため、杭径を大きくするか、若しくはコンクリートの強度を上げる必要が出てくることから、コストが嵩むこととなる。上記特許文献１のように、基礎杭を利用した設置方法においては、熱交換チューブが剥き出しとなっているため、鉄筋籠を掘削した孔に挿入する際に、熱交換チューブが孔壁と衝突して破損し、水漏れの原因となることがある。そのほか、地盤面から１０ｍ以浅は外気温や日射・積雪などの影響を受けて変動するので、熱交換率が悪くなる。本発明に係る地中熱交換チューブの設置方法は、このような課題を解決するために提案されたものである。   However, in the conventional method of installing the underground heat exchange tube, the heat exchange tube is tied to the reinforcing bar spacer with a wire to support it. The work with the equipment supplier who installs the exchange tube crosses, and the construction of the pile takes time. In addition, when a heat exchange tube is piped inside the pile, it becomes a cross-sectional defect of the pile, so that it is necessary to increase the pile diameter or increase the strength of the concrete, resulting in an increase in cost. As in the above-mentioned Patent Document 1, in the installation method using the foundation pile, since the heat exchange tube is exposed, the heat exchange tube collides with the hole wall when the reinforcing bar is inserted into the excavated hole. May cause water leakage. In addition, since the area below 10 m from the ground fluctuates due to the influence of outside air temperature, solar radiation, snow cover, etc., the heat exchange rate deteriorates. The installation method of the underground heat exchange tube according to the present invention has been proposed in order to solve such a problem.

本発明に係る地中熱交換チューブの設置方法の上記課題を解決して目的を達成するための要旨は、基礎杭用の鉄筋籠における主筋保持用の補強リングに、長手方向の両端部のうち少なくとも片側部がＬ字形に屈曲された棒状又は帯板状の配管支持材を固着し、該配管支持部材における前記Ｌ字形に屈曲された片側部の内側で上下方向に挿通させて熱交換チューブを配設し、掘削した孔に前記鉄筋籠を挿入して更にコンクリートを打設することである。   The gist for solving the above-mentioned problems of the installation method of the underground heat exchange tube according to the present invention is to provide a reinforcing ring for holding a main bar in a reinforcing bar for a foundation pile, of both longitudinal ends. At least one side portion is fixed to a bar-shaped or strip-shaped pipe support material bent into an L shape, and the heat exchange tube is inserted vertically inside the one side portion of the pipe support member bent into the L shape. It is to place the concrete bar into the hole that has been disposed and excavated, and to place concrete further.

前記Ｌ字形に屈曲された片側部には、熱交換チューブを位置固定する紐部材を挿通させるための貫通孔が穿設され、若しくは、紐部材を係止させる係止部が設けられていること、；
前記熱交換チューブは、孔に挿入された鉄筋籠の最下端位置でＵ字状に連結されており、一つの配管支持部材に前記Ｕ字状に連結された２本の熱交換チューブが固定されていること、；
更に、前記Ｌ字形に屈曲された片側部において、熱交換チューブの直径と同じかそれよりも大きな寸法の棒状若しくは帯板状の突起部材が内側に向けて先端部に固着されていること、；
また、孔に鉄筋籠を挿入しながら、前記孔の地上周囲に配設した複数のチューブ用繰出し装置から熱交換チューブを繰り出してそれぞれ配管支持部材の内側に挿通させて位置固定し、前記鉄筋籠を降下させて上下方向に適宜間隔で設けられている周方向に複数配設された配管支持部材に前記熱交換チューブを順次位置固定していくこと、；
前記熱交換チューブが、鉄筋籠の周方向に間隔を置いて複数箇所に配設された配管支持部材毎のＵ字状の熱交換チューブがそれぞれ独立して熱交換装置に配管されていること、または、鉄筋籠の上下方向の上位置で、周方向に配設された連結用パイプで各Ｕ字状の熱交換チューブが連続されて外部に２本のチューブが延出されて熱交換装置に配管されていること、；
を含むものである。 A through hole for inserting a string member for fixing the position of the heat exchange tube is formed in one side portion bent in the L shape, or a locking portion for locking the string member is provided. ,;
The heat exchange tube is connected in a U shape at the lowermost position of the reinforcing bar inserted in the hole, and the two heat exchange tubes connected in the U shape are fixed to one pipe support member. That;
Furthermore, in one side portion bent in the L-shape, a rod-like or strip-like projection member having a size equal to or larger than the diameter of the heat exchange tube is fixed to the tip portion toward the inside;
Further, while inserting the reinforcing bar rod into the hole, the heat exchanging tube is fed out from a plurality of tube feeding devices arranged around the hole and inserted into the inside of the pipe support member to fix the position. And sequentially fixing the position of the heat exchange tubes to a plurality of circumferentially disposed pipe support members provided at appropriate intervals in the vertical direction;
The U-shaped heat exchange tubes for each of the pipe support members disposed at a plurality of locations at intervals in the circumferential direction of the reinforcing bar rod are independently piped to the heat exchange device, Alternatively, at the upper position in the vertical direction of the reinforcing bar, the U-shaped heat exchange tubes are continuously connected by the connecting pipes arranged in the circumferential direction, and two tubes are extended to the heat exchange apparatus. Being plumbed;
Is included.

本発明に係る地中熱交換チューブの上記課題を解決して目的を達成するための要旨は、
基礎杭用の鉄筋籠における主筋保持用の補強リングに、長手方向の両端部のうち少なくとも片側部がＬ字形に屈曲された棒状又は帯板状の配管支持材を固着し、該配管支持部材における前記Ｌ字形に屈曲された片側部の内側で上下方向に挿通させて熱交換チューブを配設してなることである。 The gist for achieving the object by solving the above-mentioned problems of the underground heat exchange tube according to the present invention is as follows:
At the reinforcement ring for holding the main reinforcement in the reinforcing bar for the foundation pile, a rod-like or strip-like pipe support material in which at least one side portion is bent in an L shape is fixed to both ends in the longitudinal direction, and the pipe support member The heat exchange tube is disposed by being vertically inserted inside one side portion bent in the L shape.

また、Ｌ字形に屈曲された片側部において、熱交換チューブの直径と同じかそれよりも大きな寸法の棒状若しくは帯板状の突起部材が内側に向けて先端部に固着されていること、；
前記熱交換チューブは、孔に埋設した状態で地盤面から１０ｍ以浅の範囲において、当該熱交換チューブに被覆された断熱部材により断熱化されていること、；
前記配管支持部材は、側面視でＬ字形若しくはコ字形の形状であること、；
を含むものである。 Further, in one side portion bent in an L shape, a rod-like or strip-like projection member having a size equal to or larger than the diameter of the heat exchange tube is fixed to the tip portion toward the inside;
The heat exchange tube is thermally insulated by a heat insulating member covered by the heat exchange tube in a range of 10 m or less from the ground surface in a state of being embedded in the hole;
The pipe support member is L-shaped or U-shaped in a side view;
Is included.

本発明の地中熱交換チューブの設置方法と地中熱交換チューブ用の鉄筋籠によれば、鉄筋籠の補強リングに配管支持部材を設けるようにしており、低コストで済み配管作業効率を向上させることができる。更に、熱交換チューブを増設する際には、補強リングの周方向に任意の位置に熱交換チューブを増設することができる。また、熱交換チューブの取り付け位置を任意の位置に設定できるので、狭い敷地や隣地に接した場所のような作業環境でも、ループ配管の往管及び還管をピット方向に引き出せるため、作業効率を高めることができる。
前記熱交換チューブが、杭本体の外側に配置され、杭の断面欠損となることが無く、構造上の強度に影響を与えないものである。
また、熱交換チューブが基礎杭の外周部に設置されるので、効率よく熱交換が行われる。更に、鉄筋籠を孔に挿入するときにも、熱交換チューブが配管支持部材の内側にあって保護されているので、チューブに破損が生じることがない。
地盤面から１０ｍ以浅の範囲で熱交換チューブを断熱化することで、熱交換率の向上が図れる。
配管支持部材を、Ｌ字形にして半径方向の長さを短くする事で、孔の直径を小さくして、フカシ部のコンクリート量を低減させ、工期短縮とコスト低減を図ることができる。このように、数々の優れた効果を奏するものである。 According to the installation method of the underground heat exchange tube and the reinforcing bar rod for the underground heat exchange tube of the present invention, the piping support member is provided on the reinforcing ring of the reinforcing rod rod, so that the cost can be reduced and the piping work efficiency is improved. Can be made. Further, when the heat exchange tube is added, the heat exchange tube can be added at an arbitrary position in the circumferential direction of the reinforcing ring. In addition, the installation position of the heat exchange tube can be set to an arbitrary position, so that the loop pipe's forward and return pipes can be pulled out in the pit direction even in a work environment such as a narrow site or a place in contact with the adjacent site. Can be increased.
The heat exchange tube is arranged outside the pile main body, does not become a cross-sectional defect of the pile, and does not affect the structural strength.
Moreover, since a heat exchange tube is installed in the outer peripheral part of a foundation pile, heat exchange is performed efficiently. Further, when the reinforcing bar rod is inserted into the hole, the heat exchange tube is inside the pipe support member and is protected, so that the tube is not damaged.
By heat insulating the heat exchange tube within a range of 10 m or less from the ground surface, the heat exchange rate can be improved.
By making the piping support member L-shaped and shortening the length in the radial direction, the diameter of the hole can be reduced, the amount of concrete in the fracturing portion can be reduced, and the construction period can be shortened and the cost can be reduced. In this way, a number of excellent effects are exhibited.

本発明に係る地中熱交換チューブの設置方法に係る、鉄筋籠１に配管支持部材２，２ａを固着した状態の一部平面図（Ａ），（Ｂ）である。It is a partial top view (A) and (B) of the state which fixed the piping support members 2 and 2a to the reinforcing bar 1 concerning the installation method of the underground heat exchange tube which concerns on this invention. 同本発明に係る発明に係る鉄筋籠１の一部を示す斜視図（Ａ）、同鉄筋籠１を横にした状態の一部斜視図（Ｂ）であるIt is a perspective view (A) which shows a part of reinforcing bar rod 1 concerning the invention concerning the present invention, and a partial perspective view (B) of the state where the reinforcing rod rod 1 was turned sideways 同本発明の鉄筋籠１において、配管支持部材２に地中熱交換チューブ３を位置固定する様子を示す正面図（Ａ）、側面図（Ｂ）、Ｂ−Ｂ線に沿った断面図（Ｃ）、斜視図（Ｄ）、Ａ−Ａ線に沿った断面図（Ｅ）である。In the reinforcing bar rod 1 of the present invention, a front view (A), a side view (B), and a cross-sectional view along the line BB (C) showing how the underground heat exchange tube 3 is fixed to the pipe support member 2. ), A perspective view (D), and a sectional view (E) along the line AA. 本発明に係る鉄筋籠１において、補強リング４の周方向に熱交換チューブ３を４カ所に配設した場合の平面図（Ａ）と、６カ所に配設した場合の平面図（Ｂ）とである。In the reinforcing bar 1 according to the present invention, a plan view (A) when the heat exchange tubes 3 are arranged at four locations in the circumferential direction of the reinforcing ring 4, and a plan view (B) when arranged at six locations. It is. 鉄筋籠１の挿入が完了した状態で、熱交換チューブ３が基礎コンクリートの無筋部１７ａから引き出される様子を示す断面図である。It is sectional drawing which shows a mode that the heat exchange tube 3 is pulled out from the unreinforced part 17a of foundation concrete in the state which insertion of the reinforcing bar 1 was completed. 杭頭部１６ａにおける熱交換チューブ３の連結状態を示す斜視図（Ａ），（Ｂ）である。It is a perspective view (A) and (B) which show the connection state of heat exchange tube 3 in pile head 16a. 熱交換チューブ３の往管３ｂと、環管３ｃの引き出し方法を示す平面図（Ａ），（Ｂ）である。It is a top view (A) and (B) which shows the outgoing tube 3b of the heat exchange tube 3, and the drawing-out method of the ring tube 3c. 同熱交換チューブ３の連結方法で、対の数によって断面欠損が生じないようにする様子を示す平面図（Ａ），（Ｂ），（Ｃ）である。It is a top view (A), (B), (C) which shows a mode that a cross-sectional defect is not produced with the number of pairs by the connection method of the same heat exchange tube 3. FIG. 本発明の第３実施例に係り、熱交換チューブ３を断熱化した場合の断面図である。FIG. 6 is a cross-sectional view of the third embodiment of the present invention when the heat exchange tube 3 is insulated.

本発明に係る地中熱交換チューブの設置方法は、図１−Ａ乃至図１−Ｂに示すように、鉄筋籠における補強リング４に配管支持部材２を固着してその配管支持部材の内側に地中熱交換（以下単に熱交換という）チューブ３を配管して、この鉄筋籠を孔に挿入しコンクリートを打設するものである。   As shown in FIGS. 1-A to 1-B, the underground heat exchange tube according to the present invention is installed on a reinforcing ring 4 in a reinforcing bar so that the pipe support member 2 is fixed inside the pipe support member. An underground heat exchange (hereinafter simply referred to as heat exchange) tube 3 is piped, and the reinforcing bar is inserted into a hole to place concrete.

本発明に係る発明の鉄筋籠１について説明する。図１−Ａ乃至図１−Ｂに示すように、基礎杭用の鉄筋籠１における主筋５保持用で帯板状の補強リング４に、長手方向の両端部のうち少なくとも片側部がＬ字形に屈曲された棒状又は帯板状の配管支持材２，２ａを溶接手段などで固着する。図中の符号６は、フープ筋を示している。   The reinforcing bar 1 of the invention according to the present invention will be described. As shown in FIG. 1-A to FIG. 1-B, the reinforcing bar 4 for holding the main reinforcing bar 5 in the reinforcing bar 1 for the foundation pile has a L-shaped at least one side of both ends in the longitudinal direction. The bent rod-like or strip-like pipe support members 2, 2a are fixed by welding means or the like. Reference numeral 6 in the figure denotes a hoop line.

前記配管支持部材２，２ａは、例えば、コ字形やＬ字形を下帯板鋼材であり、例えば、杭径７が１３００ｍｍφで、配管支持部材２の長さが２００ｍｍで幅が９０ｍｍ、高さが１３．５ｍｍ、板厚８ｍｍ程度である。   The pipe support members 2 and 2a are, for example, U-shaped and L-shaped lower strip steel, and for example, the pile diameter 7 is 1300 mmφ, the length of the pipe support member 2 is 200 mm, the width is 90 mm, and the height is It is about 13.5 mm and the plate thickness is about 8 mm.

更に、前記配管支持部材２には、Ｌ字形に屈曲された片側部２ｂにおいて、熱交換チューブ３の直径と同じかそれよりも大きな寸法の棒状若しくは帯板状の突起部材９が内側に向けて先端部２ｃに固着されている。この突起部材９は、熱交換チューブ３が外側に移動しないように保護するものである。   Further, the pipe support member 2 has a rod-like or strip-like projection member 9 having a dimension equal to or larger than the diameter of the heat exchange tube 3 facing inward at one side portion 2b bent in an L shape. It is fixed to the tip 2c. The protruding member 9 protects the heat exchange tube 3 from moving outside.

前記配管支持部材２，２ａにおける前記Ｌ字形に屈曲された片側部２ｂの内側で、上下方向に挿通させて熱交換チューブ３が配設される。この熱交換チューブ３は、例えば、ポリエチレン管であり、一例として２５〜３０ｍｍ程度の合成樹脂製の管である。   A heat exchange tube 3 is disposed in the pipe support members 2 and 2a so as to be inserted in the vertical direction inside the one side portion 2b bent in the L shape. The heat exchange tube 3 is, for example, a polyethylene tube, and as an example, is a tube made of synthetic resin of about 25 to 30 mm.

前記配管支持部材２，２ａは、図３（Ａ）に示すように、鉄筋籠１における補強リング４の周方向に、４カ所設けられ、残りの１カ所には、熱交換チューブ３を配管しないスペーサとして使用される。なお、符号１０は、隣地境界線を示している。また、図３（Ｂ）に示すように、６カ所に配置される場合もある。前記補強リング４は、鉄筋籠１の上下方向において、例えば、３ｍ程度の間隔を置いて配置されている。   As shown in FIG. 3A, the pipe support members 2 and 2a are provided at four places in the circumferential direction of the reinforcing ring 4 in the reinforcing bar rod 1, and the heat exchange tube 3 is not piped at the remaining one place. Used as a spacer. In addition, the code | symbol 10 has shown the adjacent land boundary line. In addition, as shown in FIG. The reinforcing ring 4 is arranged at an interval of, for example, about 3 m in the vertical direction of the reinforcing bar 1.

前記配管支持部材２において、図２（Ａ）に示すように、Ｌ字形に屈曲された片側部２ｂには、熱交換チューブ３を位置固定する紐部材１１を挿通させるための貫通孔２ｄが穿設されている。前記紐部材１１は、例えば、合成樹脂製の結束バンドなどである。また、前記貫通孔２ｄに限らず、紐部材１１を係止させることができればよいので、凹部若しくは凸部などの係止部であっても良い。   In the pipe support member 2, as shown in FIG. 2A, a through hole 2 d for inserting a string member 11 for fixing the position of the heat exchange tube 3 is formed in one side portion 2 b bent in an L shape. It is installed. The string member 11 is, for example, a synthetic resin binding band. Moreover, not only the said through-hole 2d but the string member 11 should just be locked, Therefore Locking parts, such as a recessed part or a convex part, may be sufficient.

前記熱交換チューブ３のＵ字部は、ポリエチレン管自身を屈曲させるには、管の堅さによって困難でもあるので、合成樹脂製のＵ字継手１２を使用する。このＵ字継手１２の２つの吐出口にそれぞれ熱交換チューブ３の端部を密に連結するものである。このＵ字継手
１２は、鉄筋籠１の下端部における補強リング４に固着された配管支持部材２，２ａに、ボルト１３及びナット１３ａで固定される。このようにして、図２乃至図３に示すように、熱交換チューブ３は、孔１５に挿入された鉄筋籠１の最下端位置でＵ字状に連結されており、一つの配管支持部材２に前記Ｕ字状に連結された２本の熱交換チューブ３が固定されている。 The U-shaped portion of the heat exchange tube 3 is difficult to bend the polyethylene tube itself due to the rigidity of the tube, so a U-shaped joint 12 made of synthetic resin is used. The ends of the heat exchange tube 3 are tightly connected to the two outlets of the U-shaped joint 12, respectively. The U-shaped joint 12 is fixed to the pipe support members 2 and 2a fixed to the reinforcing ring 4 at the lower end portion of the reinforcing bar 1 with bolts 13 and nuts 13a. In this way, as shown in FIGS. 2 to 3, the heat exchange tube 3 is connected in a U-shape at the lowermost position of the reinforcing bar 1 inserted in the hole 15, and one pipe support member 2. The two heat exchange tubes 3 connected in the U-shape are fixed to each other.

以上のようにして、本発明に係る鉄筋籠１を構成して、地盤に掘削した孔１５に挿入する工事について説明する。前記鉄筋籠１には、図１−Ａ（Ａ），（Ｂ）及び図１−Ｂ（Ｂ）に示すように、地盤中に挿入する先端部側から補強リング４に配管支持部材２若しくは配管支持部材２ａを、溶接して固定しておく。   The construction for inserting the reinforcing bar 1 according to the present invention into the hole 15 excavated in the ground as described above will be described. As shown in FIGS. 1-A (A), (B) and FIG. 1-B (B), the reinforcing bar 1 is connected to the reinforcing ring 4 from the distal end side to be inserted into the ground, to the pipe support member 2 or the pipe. The support member 2a is fixed by welding.

更に、鉄筋籠１の先端部には、図２（Ａ），（Ｂ）に示すように、熱交換チューブ３，３の端部にＵ字継手１２を連結して、このＵ字継手１２をボルト１３及びナット１３ａで最先端部（地盤中で最下部）の補強リング４に固定する。また、前記Ｕ字継手１２のすぐ上の位置で、熱交換チューブ３を結束バンド１１などで配管支持部材２の片側部２ｂ内側に固定する。前記結束バンド１１に保護テープ１４等を巻き付けて前記片側部２ｂに巻装させて固定し、孔壁８等に衝突して切断されたり傷付けられたりしないように保護する（図１−Ｂ（Ａ）参照）。   Further, as shown in FIGS. 2 (A) and 2 (B), a U-shaped joint 12 is connected to the ends of the heat exchange tubes 3 and 3 at the distal end of the reinforcing bar 1, It fixes to the reinforcement ring 4 of the most advanced part (the lowest part in the ground) with the bolt 13 and the nut 13a. Further, the heat exchange tube 3 is fixed inside the one side portion 2b of the pipe support member 2 with a binding band 11 or the like at a position immediately above the U-shaped joint 12. A protective tape 14 or the like is wrapped around the binding band 11 and fixed to the one side portion 2b so as not to be cut or damaged by colliding with the hole wall 8 or the like (FIG. 1-B (A )reference).

前記熱交換チューブ３は、一対ずつ４カ〜８カ所に用意されるが、輪状に巻かれた熱交換チューブ３をドラムや簡易な門形枠等に挿通して掛けるようにして、これを、チューブ用繰出し装置として、該繰出し装置を前記孔１５の地上の周囲近傍に用意する。これで、前記鉄筋籠１を孔１５に挿入しながら、熱交換チューブ３をドラム等から繰り出すようにするものである。そして、前記鉄筋籠１をクレーンで吊り上げて、図１−Ｂ（Ａ）に示すように、孔１５に先端部から挿入する。   The heat exchange tubes 3 are prepared in pairs at 4 to 8 locations, and the heat exchange tubes 3 wound in a ring shape are inserted and hung through a drum or a simple portal frame, As the tube feeding device, the feeding device is prepared in the vicinity of the periphery of the hole 15 on the ground. Thus, the heat exchange tube 3 is fed out from a drum or the like while the rebar rod 1 is inserted into the hole 15. And the said reinforcing rod 1 is lifted with a crane, and as shown to FIG. 1- (A), it inserts into the hole 15 from a front-end | tip part.

鉄筋籠１の孔１５への挿入により、上下方向で約３ｍ毎に固定された、補強リング４周囲の配管支持部材２，２ａが作業者の作業位置高さに至ると、一対の熱交換チューブ３，３を結束バンド１１で補強リング４に固定する。この鉄筋籠１の挿入作業と、熱交換チューブ３の取り付け作業を順次繰り返して、図４に示すように、鉄筋籠１の孔１５への挿入を完了し、当該孔１５にコンクリートを打設する。   When the pipe support members 2 and 2a around the reinforcing ring 4 fixed at intervals of about 3 m in the vertical direction by inserting the reinforcing bar 1 into the hole 15 reach the working position height of the operator, a pair of heat exchange tubes 3 and 3 are fixed to the reinforcing ring 4 with a binding band 11. The insertion operation of the reinforcing bar 1 and the mounting operation of the heat exchange tube 3 are sequentially repeated, and the insertion of the reinforcing bar 1 into the hole 15 is completed, as shown in FIG. .

このようにして、孔１５に鉄筋籠１を挿入しながら、前記孔１５の地上周囲に配設した複数のチューブ用繰出し装置から熱交換チューブ３を繰り出してそれぞれ配管支持部材２の内側に挿通させて位置固定し、配管支持部材２に前記熱交換チューブ３を順次位置固定していく。なお、孔１５が数十メートルの深い孔である場合には、所用長さの鉄筋籠１を次々に溶接手段により首尾連結して挿入するので、前記連結する鉄筋籠１，１・・・毎に、予め必要な熱交換チューブ３をその鉄筋籠１に固定しておいて、該鉄筋籠１を連結する毎に、前記熱交換チューブ３も連結治具等で連結するようにしても良い。このようにすれば、予め、工場や現場のサイトで鉄筋籠１に熱交換チューブ３を組み付けておくことができて、挿入作業能率が向上するものである。   In this way, while inserting the reinforcing bar 1 into the hole 15, the heat exchange tubes 3 are fed out from a plurality of tube feeding devices disposed around the ground of the hole 15 and inserted inside the pipe support members 2. The positions of the heat exchange tubes 3 are sequentially fixed to the pipe support member 2. In addition, when the hole 15 is a deep hole of several tens of meters, the rebar rods 1 having the required length are successively connected and inserted by welding means one after another. In addition, a necessary heat exchange tube 3 may be fixed to the reinforcing bar 1 in advance, and the heat exchanging tube 3 may be connected with a connecting jig or the like each time the reinforcing bar 1 is connected. If it does in this way, the heat exchange tube 3 can be previously assembled | attached to the reinforcing bar 1 at the site of a factory or a field, and insertion work efficiency will improve.

図５（Ａ），（Ｂ）に示すように、基礎杭１６の杭頭１６ａにおいて、前記熱交換チューブ３の上端部を、ループ配管３ａでリング状に連結する。前記ループ配管３ａは、基礎コンクリート１７の下端の無筋部１７ａで施工する。そして、熱交換器へと引き出す往管３ｂと環管３ｃとを設ける。なお、図６に示すように、前記往管３ｂと環管３ｃとを地下ピット方向に出すようにする。これは、前記ループ配管３ａ配管作業が根切り底での工事であって、隣地境界側におけるループ配管の電気融着作業の効率化を図るためである。   As shown to FIG. 5 (A), (B), in the pile head 16a of the foundation pile 16, the upper end part of the said heat exchange tube 3 is connected with the ring shape by the loop piping 3a. The loop pipe 3 a is constructed at the bottomless portion 17 a at the lower end of the foundation concrete 17. Then, an outgoing pipe 3b and an annular pipe 3c that are drawn out to the heat exchanger are provided. As shown in FIG. 6, the outgoing pipe 3b and the ring pipe 3c are arranged in the underground pit direction. This is because the loop work of the loop pipe 3a is a work at the bottom of the root, and the efficiency of the electric fusion work of the loop pipe on the adjacent land boundary side is improved.

また、前記ループ配管３ａは、図７（Ａ）に示すように、一対の熱交換チューブ３の数が少ない場合（例えば４対や６対の場合）には隣接する熱交換チューブ３を直管（図７（Ａ），（Ｂ）中の一点鎖線で引き出す管３ａ）で連結すると、基礎杭１６の断面欠損となってしまう。そこで、例えば１３００φｍｍの杭径７であれば、曲げ直径１４００φｍｍ程度のＲ付きループ配管３ａで連結する（図７（Ａ），（Ｂ）を参照）。   In addition, as shown in FIG. 7A, the loop pipe 3a has a straight pipe for connecting the adjacent heat exchange tubes 3 when the number of the pair of heat exchange tubes 3 is small (for example, four pairs or six pairs). If it connects with (pipe 3a pulled out with the dashed-dotted line in FIG. 7 (A), (B)), it will become a cross-sectional defect | deletion of the foundation pile 16. FIG. Therefore, for example, if the pile diameter 7 is 1300 [phi] mm, it is connected by the loop pipe 3a with R having a bending diameter of about 1400 [phi] mm (see FIGS. 7A and 7B).

これにより、杭の有効断面積の外側で熱交換チューブ３同士を連結することができる。よって、杭に断面欠損が生じるおそれがない。このようにして、前記鉄筋籠１を孔１５に挿入して、熱交換チューブ３を配管支持部材２の内側に配設するので、安全に保護されて埋設されるものである。   Thereby, the heat exchange tubes 3 can be connected to each other outside the effective cross-sectional area of the pile. Therefore, there is no possibility that a cross-sectional defect will occur in the pile. In this way, the rebar rod 1 is inserted into the hole 15 and the heat exchange tube 3 is disposed inside the pipe support member 2, so that it is safely protected and embedded.

本発明に係る鉄筋籠１の他の実施例として、熱交換チューブ３に関して、鉄筋籠１の周方向に間隔を置いて複数箇所に配設された配管支持部材２毎のＵ字状の熱交換チューブ３，３がそれぞれ独立して熱交換装置に配管されていることである。これによれば、例えば、一カ所の熱交換チューブ３に、地盤１５ａ中で傷ができて液漏れを起こして使用できなくなった場合に、この一カ所だけの熱交換チューブ３を使用しないように閉鎖すれば、他の熱交換チューブ３には何の影響も与えずに済むものである。   As another example of the rebar rod 1 according to the present invention, with respect to the heat exchange tube 3, U-shaped heat exchange for each of the pipe support members 2 arranged at a plurality of positions at intervals in the circumferential direction of the rebar rod 1. It is that the tubes 3 and 3 are independently piped to the heat exchange device. According to this, for example, when the heat exchange tube 3 in one place is damaged in the ground 15a and cannot be used due to liquid leakage, do not use the heat exchange tube 3 in only one place. If closed, the other heat exchange tubes 3 are not affected in any way.

これに対して、前記実施例１におけるように、鉄筋籠１の上下方向の上位置で、周方向に配設された連結用パイプ（ループ配管３ａ）で各Ｕ字状の熱交換チューブ３，３が連続されて外部に２本のチューブ３ｂ，３ｃが延出されて熱交換装置に配管されていると、一カ所に傷が付いて液漏れが生じると、その傷付いた場所を特定する事自体が困難であり、熱交換装置全体が使用できなくなってしまうという欠点がある。   On the other hand, as in the first embodiment, each U-shaped heat exchange tube 3 is connected by a connecting pipe (loop piping 3a) disposed in the circumferential direction at the upper position in the vertical direction of the reinforcing bar 1. If the tube 3 is continuous and the two tubes 3b and 3c are extended to the outside and piped to the heat exchange device, if one place is damaged and a liquid leaks, the damaged place is specified. This is difficult and the drawback is that the entire heat exchanger cannot be used.

図８に示すように、熱交換チューブ３は、孔１５に埋設した状態で地盤面１５ｂから１０ｍ以浅の範囲において、断熱部材により断熱化されていることである。これは、地盤面１５ｂから約１０ｍ以深の地中温度は、年間を通じて温度が安定しているので、その温度が安定している地中の範囲での熱交換を行うので、前記地盤面１５ｂから１０ｍ以浅の熱交換チューブ３を、保温することで熱交換率を高めるものである。   As shown in FIG. 8, the heat exchange tube 3 is insulated by a heat insulating member in a range of 10 m or less from the ground surface 15 b in a state of being embedded in the hole 15. This is because the underground temperature of about 10 m or more from the ground surface 15b is stable throughout the year, and heat exchange is performed in the underground range where the temperature is stable. The heat exchange rate is increased by keeping the heat exchange tube 3 shallower than 10 m warm.

本発明に係る地中熱交換チューブの設置方法とそれに使用する鉄筋籠は、地中熱を利用する熱交換装置で、孔に鉄筋籠を使用する杭等に適用することができる。   The installation method of the underground heat exchange tube according to the present invention and the reinforcing bar used for it are heat exchange devices that use underground heat, and can be applied to piles that use the reinforcing bar for holes.

１ 鉄筋籠、
２ 配管支持部材、 ２ａ 配管支持部材、
２ｂ 片側部、 ２ｃ 先端部、
２ｄ 貫通孔、
３ 熱交換チューブ、 ３ａ ループ配管、
３ｂ 往管、 ３ｃ 環管、
４ 補強リング、
５ 主筋、
６ フープ筋、
７ 杭径、
８ 孔壁、
９ 突起部材、
１０ 隣地境界線、
１１ 紐部材、
１２ Ｕ字継手、 １２ａ 取付孔、
１３ ボルト、 １３ａ ナット、
１４ 保護テープ、
１５ 孔、 １５ａ 地盤、
１５ｂ 地盤面、
１６ 基礎杭、 １６ａ 杭頭、
１７ 基礎コンクリート、 １７ａ 無筋部。 1 Rebar rod,
2 piping support member, 2a piping support member,
2b one side, 2c tip,
2d through hole,
3 heat exchange tube, 3a loop piping,
3b Outlet tube, 3c Ring tube,
4 Reinforcement ring,
5 main muscles,
6 Hoop muscle,
7 Pile diameter,
8 perforated walls,
9 Protruding member,
10 Adjacent border line,
11 String members,
12 U-shaped joint, 12a Mounting hole,
13 bolts, 13a nuts,
14 Protective tape,
15 holes, 15a ground,
15b Ground surface,
16 foundation pile, 16a pile head,
17 Foundation concrete, 17a Unstriped part.

Claims (10)

基礎杭用の鉄筋籠における主筋保持用の補強リングに、長手方向の両端部のうち少なくとも片側部がＬ字形に屈曲された棒状又は帯板状の配管支持材を固着し、該配管支持部材における前記Ｌ字形に屈曲された片側部の内側で上下方向に挿通させて熱交換チューブを配設し、掘削した孔に前記鉄筋籠を挿入して更にコンクリートを打設すること、
を特徴とする地中熱交換チューブの設置方法。 At the reinforcement ring for holding the main reinforcement in the reinforcing bar for the foundation pile, a rod-like or strip-like pipe support material in which at least one side portion is bent in an L shape is fixed to both ends in the longitudinal direction, and the pipe support member Inserting a heat exchanging tube in the up and down direction inside one side part bent in the L shape, inserting the rebar rod into the excavated hole, and placing concrete further;
The installation method of the underground heat exchange tube characterized by this. Ｌ字形に屈曲された片側部には、熱交換チューブを位置固定する紐部材を挿通させるための貫通孔が穿設され、若しくは、紐部材を係止させる係止部が設けられていること、
を特徴とする請求項１に記載の地中熱交換チューブの設置方法。 A through hole for inserting a string member for fixing the position of the heat exchange tube is formed in one side portion bent in an L shape, or a locking part for locking the string member is provided,
The installation method of the underground heat exchange tube of Claim 1 characterized by these. 熱交換チューブは、孔に挿入された鉄筋籠の最下端位置でＵ字状に連結されており、一つの配管支持部材に前記Ｕ字状に連結された２本の熱交換チューブが固定されていること、
を特徴とする請求項１乃至２のいずれかに記載の地中熱交換チューブの設置方法。 The heat exchange tube is connected in a U shape at the lowest end position of the reinforcing bar rod inserted in the hole, and the two heat exchange tubes connected in the U shape are fixed to one pipe support member. Being
The installation method of the underground heat exchange tube in any one of Claim 1 thru | or 2 characterized by these. Ｌ字形に屈曲された片側部において、熱交換チューブの直径と同じかそれよりも大きな寸法の棒状若しくは帯板状の突起部材が内側に向けて先端部に固着されていること、
を特徴とする請求項１乃至３のいずれかに記載の地中熱交換チューブの設置方法。 On one side bent into an L-shape, a rod-like or strip-like projection member having a size equal to or larger than the diameter of the heat exchange tube is fixed to the tip portion toward the inside,
The installation method of the underground heat exchange tube in any one of Claims 1 thru | or 3 characterized by these. 孔に鉄筋籠を挿入しながら、前記孔の地上周囲に配設した複数のチューブ用繰出し装置から熱交換チューブを繰り出してそれぞれ配管支持部材の内側に挿通させて位置固定し、前記鉄筋籠を降下させて上下方向に適宜間隔で設けられている周方向に複数配設された配管支持部材に前記熱交換チューブを順次位置固定していくこと、
を特徴とする請求項１乃至４のいずれかに記載の地中熱交換チューブの設置方法。 While inserting the reinforcing bar rod into the hole, the heat exchange tubes are drawn out from a plurality of tube feeding devices arranged around the hole above and inserted into the inside of the pipe support member to fix the position, and the reinforcing bar rod is lowered. The position of the heat exchange tubes is sequentially fixed to a plurality of pipe support members arranged in the circumferential direction provided at appropriate intervals in the vertical direction.
The installation method of the underground heat exchange tube in any one of Claims 1 thru | or 4 characterized by these. 熱交換チューブが、鉄筋籠の周方向に間隔を置いて複数箇所に配設された配管支持部材毎のＵ字状の熱交換チューブがそれぞれ独立して熱交換装置に配管されていること、または、鉄筋籠の上下方向の上位置で、周方向に配設された連結用パイプで各Ｕ字状の熱交換チューブが連続されて外部に２本のチューブが延出されて熱交換装置に配管されていること、
を特徴とする請求項１乃至５のいずれかに記載の地中熱交換チューブの設置方法。 The heat exchange tubes are piped to the heat exchange device independently of the U-shaped heat exchange tubes for each of the pipe support members arranged at a plurality of positions at intervals in the circumferential direction of the reinforcing bar, or The U-shaped heat exchange tubes are continuously connected by connecting pipes arranged in the circumferential direction at the upper position in the vertical direction of the reinforcing rods, and two tubes are extended to the outside to be piped to the heat exchange device. is being done,
The installation method of the underground heat exchange tube in any one of Claims 1 thru | or 5 characterized by these. 基礎杭用の鉄筋籠における主筋保持用の補強リングに、長手方向の両端部のうち少なくとも片側部がＬ字形に屈曲された棒状又は帯板状の配管支持材を固着し、該配管支持部材における前記Ｌ字形に屈曲された片側部の内側で上下方向に挿通させて熱交換チューブを配設してなること、
を特徴とする地中熱交換チューブ用の鉄筋籠。 At the reinforcement ring for holding the main reinforcement in the reinforcing bar for the foundation pile, a rod-like or strip-like pipe support material in which at least one side portion is bent in an L shape is fixed to both ends in the longitudinal direction, and the pipe support member The heat exchange tube is disposed by being vertically inserted inside one side portion bent into the L shape,
Reinforcing rod for underground heat exchange tubes. Ｌ字形に屈曲された片側部において、熱交換チューブの直径と同じかそれよりも大きな寸法の棒状若しくは帯板状の突起部材が内側に向けて先端部に固着されていること、
を特徴とする請求項７に記載の地中熱交換チューブ用の鉄筋籠。 On one side bent into an L-shape, a rod-like or strip-like projection member having a size equal to or larger than the diameter of the heat exchange tube is fixed to the tip portion toward the inside,
The reinforcing bar rod for underground heat exchange tubes according to claim 7 characterized by these. 熱交換チューブは、孔に埋設した状態で地盤面から１０ｍ以浅の範囲において、当該熱交換チューブに被覆された断熱部材により断熱化されていること、
を特徴とする請求項７乃至８のいずれかに記載の地中熱交換チューブ用の鉄筋籠。 The heat exchange tube is insulated by a heat insulating member covered with the heat exchange tube in a range of 10 m or less from the ground surface in a state of being embedded in the hole,
The reinforcing bar rod for underground heat exchange tubes according to any one of claims 7 to 8. 配管支持部材は、側面視でＬ字形若しくはコ字形の形状であること、
を特徴とする請求項７または９に記載の地中熱交換チューブ用の鉄筋籠。 The pipe support member is L-shaped or U-shaped in a side view,
The reinforcing bar rod for underground heat exchange tubes according to claim 7 or 9.
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