JP2016223271A - Construction method for burying underground heat exchanger in steel pipe pile - Google Patents
Construction method for burying underground heat exchanger in steel pipe pile Download PDFInfo
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- JP2016223271A JP2016223271A JP2015119756A JP2015119756A JP2016223271A JP 2016223271 A JP2016223271 A JP 2016223271A JP 2015119756 A JP2015119756 A JP 2015119756A JP 2015119756 A JP2015119756 A JP 2015119756A JP 2016223271 A JP2016223271 A JP 2016223271A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 150
- 239000010959 steel Substances 0.000 title claims abstract description 150
- 238000010276 construction Methods 0.000 title abstract description 13
- 239000002689 soil Substances 0.000 claims abstract description 56
- 230000002265 prevention Effects 0.000 claims abstract description 40
- 230000009545 invasion Effects 0.000 claims description 31
- 238000000034 method Methods 0.000 claims description 21
- 238000009933 burial Methods 0.000 claims description 2
- 238000003780 insertion Methods 0.000 description 7
- 230000037431 insertion Effects 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000009826 distribution Methods 0.000 description 3
- 229920001903 high density polyethylene Polymers 0.000 description 3
- 239000004700 high-density polyethylene Substances 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 239000011440 grout Substances 0.000 description 2
- 239000013529 heat transfer fluid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
- F24T10/00—Geothermal collectors
- F24T10/10—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground
- F24T10/13—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground using tube assemblies suitable for insertion into boreholes in the ground, e.g. geothermal probes
- F24T10/15—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground using tube assemblies suitable for insertion into boreholes in the ground, e.g. geothermal probes using bent tubes; using tubes assembled with connectors or with return headers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
- F24T10/00—Geothermal collectors
- F24T2010/50—Component parts, details or accessories
- F24T2010/53—Methods for installation
-
- 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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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
- Foundations (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
Description
この発明は、鋼管杭内部に地中熱交換器を埋設するための工法に関する。 The present invention relates to a construction method for embedding a ground heat exchanger in a steel pipe pile.
地中熱ヒートポンプシステム等構築のため、建築物等の鋼管杭基礎内部に地中熱交換器を埋設するにあたり、鋼管杭内部に土壌があっては熱交換器を設置出来ないため、杭の下端を閉塞させて打設する必要がある。従来より、杭下端が閉塞された鋼管杭の打ち込み工法として回転貫入鋼管杭を用いたものがあるが、本発明にて示すように、鋼管杭とこの鋼管杭内に位置する土壌侵入防止鋼管とを組み合わせて用いる鋼管杭の打設工法は見当たらない。また、熱交換器としてはＵチューブと呼ばれる合成樹脂管を用いられることが一般的である。 In order to embed a ground heat exchanger inside a steel pipe pile foundation such as a building to construct a ground heat pump system, the bottom of the pile cannot be installed because there is soil inside the steel pipe pile. It is necessary to close and place. Conventionally, there is a method using a rotary penetration steel pipe pile as a method of driving a steel pipe pile whose lower end is closed, but as shown in the present invention, a steel pipe pile and a soil intrusion prevention steel pipe located in the steel pipe pile There is no method for placing steel pipe piles in combination. Further, as a heat exchanger, a synthetic resin tube called a U tube is generally used.
従来から用いられている回転貫入鋼管杭は、有底鋼管下端に、鋼管外径より大径の略半円形羽根板を相互に角度を変えて対称的傾斜面を有するものとして、この鋼管杭を回転することにて、この羽根が土を切り込みつつ土中に侵入して鋼管杭を土中に位置させる工法である。しかし、この工法は鋼管杭すべてに先端翼の加工が必要となり、さらには複雑な形状のため高コストとなる。また、この工法は特殊な重機が必要となるため、バイブロハンマー等の打撃工法と比較し汎用性が低い。 Conventionally used rotary-penetrated steel pipe piles have a semi-circular vane plate with a larger diameter than the outer diameter of the steel pipe at the lower end of the bottomed steel pipe, and have a symmetrical inclined surface. By rotating, this blade penetrates into the soil while cutting the soil, and the steel pipe pile is positioned in the soil. However, this method requires processing of the tip wings for all steel pipe piles, and is also expensive due to its complicated shape. In addition, since this method requires special heavy machinery, it is less versatile than a hitting method such as a vibro hammer.
そして上記したＵチューブは、長Ｕ形の高密度ポリエチレン樹脂管であって、その施工はほとんどが現場作業となるために、施工に時間と労力とを必要とし、また、単なるＵ形の管体内に伝熱流体を循環させる方式のために、熱交換効率の高いものではない。
本発明は以上に鑑み、鋼管杭と、この鋼管杭内に位置する閉塞先鋭下端を有する鋼管とを併用すること、さらには、あらかじめ組み上げられた複数分岐の地中熱交換器を、土中に打設した鋼管杭内に挿入設置することにて、施工コストの低減化と施工性の向上、及び熱交換効率の向上を目的として発明されたものである。The above-mentioned U tube is a long U-shaped high-density polyethylene resin pipe, and since the construction is mostly field work, construction requires time and labor. Because of the method of circulating the heat transfer fluid, the heat exchange efficiency is not high.
In view of the above, the present invention uses a steel pipe pile in combination with a steel pipe having a closed sharpened lower end located in the steel pipe pile, and further, a multi-branch underground heat exchanger assembled in advance in the soil. It was invented for the purpose of reducing the construction cost, improving the workability, and improving the heat exchange efficiency by being inserted and installed in the cast steel pipe pile.
課題を解決する手段として本発明は以下の構成とした。
すなわち、閉塞された先鋭下端を有する土壌侵入防止鋼管を、土中に打ち込むための鋼管杭内に挿入固定するとともに、該先鋭下端を鋼管杭下端より突出露出させ、以上の構成物を土中に打ち込んだ後、土中の鋼管杭より土壌侵入防止鋼管を分離して引き抜く。その後、該鋼管杭内に位置させるための熱交換器を設ける。
本発明は以上の構成よりなる、鋼管杭内部に地中熱交換器を埋設するための工法である。The present invention has the following configuration as means for solving the problems.
That is, a steel intrusion prevention steel pipe having a closed sharp lower end is inserted and fixed in a steel pipe pile for driving into the soil, and the sharp lower end is protruded and exposed from the lower end of the steel pipe pile. After driving in, the soil invasion prevention steel pipe is separated from the steel pipe pile in the soil and pulled out. Then, the heat exchanger for positioning in this steel pipe pile is provided.
The present invention is a construction method for embedding a ground heat exchanger in a steel pipe pile having the above configuration.
本発明によれば、鋼管杭打設時において、閉塞された先鋭下端を有する土壌侵入防止鋼管が鋼管杭内に位置しているために、打設時における鋼管杭内への土壌等の不要な侵入を防ぐとともに、打設後の鋼管杭から土壌侵入防止鋼管を引き抜く工法のため、この土壌侵入防止鋼管を使い回すことができる。又、回転貫入鋼管杭とは異なり、汎用性の高いバイブロハンマー工法等の打撃工法による打設が可能である。 According to the present invention, when the steel pipe pile is placed, the soil intrusion prevention steel pipe having the closed sharp bottom end is located in the steel pipe pile. In addition to preventing intrusion, the soil invasion prevention steel pipe can be reused for the construction method of pulling out the soil invasion prevention steel pipe from the steel pipe pile after placement. In addition, unlike a rotary penetrating steel pipe pile, it can be placed by a hitting method such as a highly versatile Vibro hammer method.
さらには、採熱部が多分岐の熱交換器を用いるので、熱交換効率を向上させることができ、鋼管杭内径と熱交換器外径は近似であり熱交換器外径がやや小さいため、挿入するだけで位置が決まる。そして熱交換器は鋼管杭の底部まで落とし込み非固定のため、そのセッティングは容易である。
以上から低コストで施工性の高い打設を可能とし、効率の良い熱交換器を用いるため、地中熱交換器埋設のための、新規かつ有用なる工法を得ることができる。Furthermore, since the heat collecting part uses a multi-branch heat exchanger, the heat exchange efficiency can be improved, the steel pipe pile inner diameter and the heat exchanger outer diameter are approximate, and the heat exchanger outer diameter is slightly smaller, Just insert it to determine the position. And since the heat exchanger is dropped to the bottom of the steel pipe pile and is not fixed, its setting is easy.
From the above, it is possible to install with low cost and high workability, and since an efficient heat exchanger is used, a new and useful construction method for underground heat exchanger embedding can be obtained.
以下、本発明の実施形態について説明する。
最初に、本工法に用いる各部材について説明する。
図において、１は鋼管杭で、全長約１０ｍ、外径約３５０ｍｍ程の鋼管である。２は土壌侵入防止鋼管で、上記の鋼管杭の内径よりやや小さい外径を有する鋼管であって、その下端には先鋭部３が固着される。この先鋭部は中空円錐形であり、その最大外径は土壌侵入防止鋼管外径よりわずかに大きく、かつ、鋼管杭内径よりわずかに小さい。また、土壌侵入防止鋼管の同一径部分長は、鋼管杭全長と近似である。
４は取付部で、図３にて示すように、円板と接続金具およびナットから構成されている。円板５は土壌侵入防止鋼管の上縁を塞ぐ外径を有して、該土壌侵入防止鋼管上縁に固着される。接続金具６は、その下端近傍を直角に折曲してなる金属製長方形小板体であって、側面視略Ｌ形の部材であり、その折曲下部を内側にして円板上面に、所定間隔にて平面視四等配に固着される。この取付部の上部には適宜径の孔が穿設され、この孔に内径が一致する市販のナット７が、取付部内面孔位置に固着される。Hereinafter, embodiments of the present invention will be described.
Initially, each member used for this construction method is demonstrated.
In the figure, 1 is a steel pipe pile, which is a steel pipe having a total length of about 10 m and an outer diameter of about 350 mm.
１０は鋼管杭打ち込み用金具である。この鋼管杭打ち込み用金具は図１にて示すように、主部１０ａと鋼管杭固定部１０ｂから構成される。主部は所定長のＨ型鋼１１の一端に固定部取付用円板１２が固着され、該円板の他面中央には、接続金具取付孔１４を外周近傍に有する挿入筒部１３が固着され、該挿入筒部外面と固定部取付用円板面との間には、長方形状小金属板によるストッパー１５が図４のように四等配に固着されて、以上にて主部の主要部が構成される。また、固定部取付用円板の外周近傍には複数個の取付孔１６が穿設され、挿入筒部内には補強リブ１７が適宜に固着される。
鋼管杭固定部１０ｂは、図９にて示すように二分割の物品である。
図において、２０は略半円弧形の押さえ部、２１は該押さえ部の両端に直角に位置する相互固定部、２２は押さえ部の一端に固着される半環状の主部固定部であり、相互固定部と主部固定部の双方には複数個の取付孔として２３および２４が各々穿設される。
この鋼管杭固定部はほぼ同一形状物を二個使用するものであり、押さえ部を相互に螺着させた場合の内径は、鋼管杭の外径よりわずかに小さく形成され、取付孔２４の位置は取付孔１６の位置に一致する。The steel pipe pile fixing | fixed
In the figure, 20 is a substantially semicircular arc-shaped pressing part, 21 is a mutual fixing part positioned at right angles to both ends of the pressing part, 22 is a semi-annular main part fixing part fixed to one end of the pressing part, A plurality of
This steel pipe pile fixing part uses two substantially identical shapes, and the inner diameter when the holding parts are screwed together is formed slightly smaller than the outer diameter of the steel pipe pile, and the position of the
図１６において１１０は熱交換器である。１１１は所定長の高密度ポリエチレン樹脂製の採熱管で外径２７ｍｍほどであり、平面視六等配に配備され、その全長は約８ｍである。この採熱管の上下には上部エルボ１１２および下部エルボ１１３が接合されるとともに、該エルボには上部接合管１１４および下部接合管１１５が各々接合される。１１６は上部分配管で、中央の有底の大径管部１１７に六等配に直交して小径管部１１８が連通接合している。前記の上部接合管はこの小径管部に接合される。 In FIG. 16,
１２０は下部分配管で、上部分配管と同一構成物であって、同様に下部接合管が小径管部に接合される。１２１は外径４２ｍｍ程の流入管で、その下端は下部分配管の大径管部に連通接合され、他方は上方へ伸びて各管配置の間隙より上方へ伸延している。
１２２は流出管で、その下端は上部分配管の大径管部に接合され、他方は上方へ伸延している。
122 is an outflow pipe, the lower end is joined to the large diameter pipe part of the upper part pipe, and the other is extended upwards.
図１８に示すように、この熱交換器全体の外径は鋼管杭内径よりやや小さい。従って、鋼管杭内にこの熱交換器を挿入するだけで各採熱管は管内での平面方向の位置が強制的に決まる。 As shown in FIG. 18, the outer diameter of the entire heat exchanger is slightly smaller than the inner diameter of the steel pipe pile. Therefore, just by inserting this heat exchanger into the steel pipe pile, the position of each heat collecting pipe in the plane direction within the pipe is forcibly determined.
上記の接合はエルボ、分配管等の各継ぎ手に内蔵されている電熱線に通電させて、継ぎ手と管を溶着させることにより行う。 The above-mentioned joining is performed by energizing the heating wire built in each joint such as an elbow and a distribution pipe and welding the joint and the pipe.
次に、本発明工法の作業手順について説明する。
１．鋼管杭、土壌侵入防止鋼管、鋼管杭打ち込み用金具、熱交換器を準備する。
２．土壌侵入防止鋼管に固着されている接続部４を鋼管杭打ち込み用金具の主部の挿 入筒部１３内に挿入し、接続部の取付孔１４とナット７との位置を一致させてボ ルトにて螺着する。この作業にて図５のように、土壌侵入防止鋼管と鋼管杭打ち 込み用金具の主部とが固定される。
３．土壌侵入防止鋼管を鋼管杭内へ挿入する。このとき図８のように、前記のストッ パー１５が鋼管杭端に当接して鋼管杭に対する土壌侵入防止鋼管の位置決めがな される。
４．図９のように、鋼管杭固定部１０ｂの押さえ部２０を鋼管杭の外面に当接させ、 鋼管杭固定部を鋼管杭外周にあてがってボルトとナットにて相互固定するととも に、主部の固定部取付用円板１２に穿設された取付孔１６と取付孔２４とを一致 させてボルトとナットにて螺着する。以上の作業にて、土壌侵入防止鋼管と鋼管 杭と打ち込み用金具は固定され、図１０、１１のように一体化する。
５．バイブロハンマー等の打ち込み用機械にて主部のＨ型鋼部分１１を強固に把持し 土中に鋼管杭を打設する。
６．打設後、図１２のようにボルトを緩めて鋼管杭固定部１０ｂを取り外し、次に図 １３のように土壌侵入防止鋼管を引き抜く。
７．図１４のように土壌侵入防止鋼管より主部を取り外す。
８．図１５のように土中の鋼管杭内に熱交換器１１０を挿入設置し、グラウト材を注 入する。
以上が本発明工法の作業手順である。Next, the work procedure of the method of the present invention will be described.
1. Prepare steel pipe piles, soil invasion prevention steel pipes, steel pipe pile driving hardware, and heat exchangers.
2. The
3. Insert the soil invasion prevention steel pipe into the steel pipe pile. At this time, as shown in FIG. 8, the
4). As shown in FIG. 9, the holding
5. The main part of the H-shaped
6). After placing, the bolt is loosened as shown in FIG. 12 to remove the steel pipe
7). The main part is removed from the soil invasion prevention steel pipe as shown in FIG.
8). As shown in FIG. 15, the
The above is the work procedure of the method of the present invention.
以上、本発明について記したが、本発明は鋼管杭と土壌侵入防止鋼管とを組み合わせて用いるところにその特徴を有するものである。従来は既述のように、回転貫入鋼管杭を用いる例があるが、加工コスト面での問題があり、打ち込む重機も特殊である。また、既述の土壌侵入防止鋼管自体を土中に打ち込む方式も考えられるが、市販の鋼管下端に円錐形の先鋭部を設けねばならず、加工コスト面で有利とはいえない。しかるに、本発明工法では、鋼管杭自体には一切の加工を加えることなく、汎用性の高い打撃工法で打ち込むことが出来、さらには土壌侵入防止鋼管は施工後に土中から引き抜いて再使用することができて、採算的に有利となるものである。 As mentioned above, although this invention was described, this invention has the characteristic in the place which uses a steel pipe pile and a soil invasion prevention steel pipe in combination. Conventionally, as described above, there is an example in which a rotating penetrating steel pipe pile is used, but there is a problem in processing cost, and a heavy machine to be driven is also special. A method of driving the above-described soil invasion prevention steel pipe itself into the soil is also conceivable, but it is not advantageous in terms of processing cost because a commercially available steel pipe must have a conical sharp end at the lower end. However, in the method of the present invention, the steel pipe pile itself can be driven by a highly versatile hammering method without any processing, and the soil invasion prevention steel pipe can be pulled out from the soil after construction and reused. Can be profitable.
本発明にて特徴的なところは、土中に残すための鋼管杭と土壌侵入防止鋼管とを一体化させて土中に打ち込んだ後、土壌侵入防止鋼管を引き抜いて鋼管杭のみを残すところにある。土壌侵入防止鋼管の下端は先鋭となっているので、そのまま土中に打ち込むことが可能である。
鋼管杭と土壌侵入防止鋼管の鋼管部分は、市販の鋼管を用いるために、その内外径は規格により定まっている。そのために、鋼管杭と土壌侵入防止鋼管の組み合わせにおいて、鋼管杭内径と土壌侵入防止鋼管外径との間にクリアランスが生ずる。鋼管杭上端は前記の主部に固定されるが、その下端は非固定であり、そのために鋼管杭下部に対する土壌侵入防止鋼管下部のふらつきが生ずる恐れがある。The characteristic place in the present invention is that the steel pipe pile for leaving in the soil and the soil invasion prevention steel pipe are integrated into the soil, and then the soil invasion prevention steel pipe is pulled out to leave only the steel pipe pile. is there. Since the lower end of the steel intrusion prevention steel pipe is sharp, it can be driven into the soil as it is.
Since the steel pipe portion of the steel pipe pile and the soil invasion prevention steel pipe uses a commercially available steel pipe, the inner and outer diameters are determined by the standard. Therefore, in the combination of the steel pipe pile and the soil invasion prevention steel pipe, a clearance is generated between the steel pipe pile inner diameter and the soil invasion prevention steel pipe outer diameter. The upper end of the steel pipe pile is fixed to the main part, but the lower end thereof is not fixed. Therefore, there is a possibility that the soil invasion prevention steel pipe lower part may fluctuate with respect to the lower part of the steel pipe pile.
これを防止するために、本発明は土壌侵入防止鋼管下端に設ける先鋭部の最大外径のサイズを、鋼管杭内径より小さく、土壌侵入防止鋼管外径より大きく設けて、鋼管杭内径よりわずかに小さい外径とすることにてクリアランスを小とし、ふらつき防止手段とした、
また、先鋭部の最大外径部すなわち上縁は、鋼管杭下端よりやや中に入る位置とした。
これは、打ち込み後に鋼管杭から土壌侵入防止鋼管を引き抜く場合に、この先鋭部上縁が鋼管杭下端に当たって引き抜き不能となることを防ぐための方策である。また、このクリアランス小とすることにて鋼管杭内への土壌侵入量を減らすことができる。
先鋭部の鋼管杭に対する位置決めは、前記のストッパーが鋼管杭上縁に当接することにて定められる。In order to prevent this, the present invention sets the maximum outer diameter of the sharpened portion provided at the lower end of the soil invasion prevention steel pipe to be smaller than the inner diameter of the steel pipe pile and larger than the outer diameter of the soil invasion prevention steel pipe, and is slightly smaller than the inner diameter of the steel pipe pile. By making the outer diameter small, the clearance is small, and it is a means to prevent wobbling,
Moreover, the maximum outer diameter portion, that is, the upper edge of the sharpened portion was set at a position slightly inside the lower end of the steel pipe pile.
This is a measure for preventing the upper edge of the sharp portion from hitting the lower end of the steel pipe pile and being unable to be drawn when the steel pipe pile is pulled out from the steel pipe pile after driving. Moreover, the soil penetration | invasion amount into a steel pipe pile can be reduced by setting it as this clearance small.
Positioning of the sharpened portion with respect to the steel pipe pile is determined by contacting the stopper with the upper edge of the steel pipe pile.
鋼管杭打ち込み等終了後は、熱交換器を該杭内にセッティングする。一般的には熱交換器として、長Ｕ形の高密度ポリエチレン樹脂製であるＵチューブが用いられている。熱交換器の種類は、熱交換能力が十分あれば問わないが、施工性と熱交換効率向上のため、本発明においては前記の通り、採熱部が多分岐された熱交換器を用いるものとした。 After the steel pipe pile driving, etc., the heat exchanger is set in the pile. In general, a U-tube made of a long U-shaped high-density polyethylene resin is used as a heat exchanger. The type of the heat exchanger is not limited as long as the heat exchange capacity is sufficient, but in order to improve the workability and the heat exchange efficiency, in the present invention, as described above, a heat exchanger having a multi-branching heat collecting part is used It was.
この熱交換器は、所定長の管体による採熱管を例えば平面視六等配に配置するとともに上下の分配管に集結連通させ、この分配管の一方に流入管を、他方に流出管を接合させ、熱交換器内に伝熱流体を循環させるものである。分岐型のため、その伝熱面積が大きくなるために熱交換効率が向上し、かつ鋼管杭の全方向から熱を吸収することができる。なお、伝熱のために、鋼管杭内に水や土砂その他のグラウト材が適量注入される。 In this heat exchanger, heat collecting tubes of a predetermined length are arranged in, for example, a hexagonal plan view, and are connected to the upper and lower distribution pipes. The heat transfer fluid is circulated in the heat exchanger. Since it is a branched type, its heat transfer area is increased, so that the heat exchange efficiency is improved and heat can be absorbed from all directions of the steel pipe pile. In addition, an appropriate amount of water, earth and sand, or other grout material is injected into the steel pipe pile for heat transfer.
さらに、この熱交換器全体の外径は鋼管杭内径よりやや小さい。従って鋼管杭内にこの熱交換器を挿入するだけで各採熱管は管内での平面方向の位置が強制的に決まりＵチューブと比較し施工も容易である。 Furthermore, the outer diameter of the entire heat exchanger is slightly smaller than the inner diameter of the steel pipe pile. Therefore, just by inserting this heat exchanger into the steel pipe pile, the position of each heat collecting pipe in the plane direction is forcibly determined, and the construction is easier than the U tube.
以上説明したように、本発明によれば土壌侵入防止鋼管を使い回すことによる鋼管杭の加工コストの低廉化と、分岐型の熱交換器による熱交換効率の向上、及び施工性の向上に寄与する有用なる地中熱交換器埋設のための工法を得ることができる。 As described above, according to the present invention, the steel pipe pile processing cost can be reduced by using the soil invasion prevention steel pipe, the heat exchange efficiency can be improved by the branch type heat exchanger, and the workability can be improved. The useful construction method for underground heat exchanger burial can be obtained.
１ 鋼管杭
２ 土壌侵入防止鋼管
３ 先鋭部
４ 取付部
５ 円板
６ 接続金具
７ ナット
１０ 鋼管杭打ち込み用金具
１０ａ 主部
１０ｂ 鋼管杭固定部
１１ Ｈ型鋼
１２ 固定部取付用円板
１３ 挿入筒部
１４ 接続金具取付孔
１５ ストッパー
１６ 取付孔
１７ 補強リブ
２０ 押さえ部
２１ 相互固定部
２２ 主部固定部
２３ 取付孔
２４ 取付孔
１１０ 熱交換器
１１１ 採熱管
１１２ 上部エルボ
１１３ 下部エルボ
１１４ 上部接続管
１１５ 下部接続管
１１６ 上方分配管
１１７ 大径管部
１１８ 小径管部
１２０ 下部分配管
１２１ 流入管
１２２ 流出管DESCRIPTION OF
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| JP2003148079A (en) * | 2001-11-12 | 2003-05-21 | Kubota Corp | Manufacturing method for equipment for exchanging heat with ground, and pile for civil engineering and construction, used for the manufacturing method |
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