JP2002303088A - Method of installing heat-exchanger tube for utilizing underground heat - Google Patents
Method of installing heat-exchanger tube for utilizing underground heatInfo
- Publication number
- JP2002303088A JP2002303088A JP2001108313A JP2001108313A JP2002303088A JP 2002303088 A JP2002303088 A JP 2002303088A JP 2001108313 A JP2001108313 A JP 2001108313A JP 2001108313 A JP2001108313 A JP 2001108313A JP 2002303088 A JP2002303088 A JP 2002303088A
- Authority
- JP
- Japan
- Prior art keywords
- steel pipe
- heat exchange
- exchange tube
- drilled
- heat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- 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
Landscapes
- 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)
- Road Paving Structures (AREA)
- Earth Drilling (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、空調や融雪等の熱
源（水）として地中熱を利用する蓄熱・集熱（以下、蓄
熱という）用の熱交換チューブを地中に設置する方法に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of installing underground a heat exchange tube for heat storage and heat collection (hereinafter referred to as heat storage) using underground heat as a heat source (water) for air conditioning, snow melting, or the like. .
【０００２】[0002]
【従来の技術】地中は膨大な熱容量、優れた保温力を有
するため自然の熱エネルギーを利用した安全、且つ経済
的な蓄熱体として利用することができる。2. Description of the Related Art Underground has an enormous heat capacity and an excellent heat-retaining power, so that it can be used as a safe and economical heat storage element utilizing natural thermal energy.
【０００３】地中蓄熱手段としては、地下水槽方式や地
中熱交換チューブ方式がある。地中熱交換チューブ方式
には、水平に熱交換チューブを埋設したものと、垂直に
設置したものがあるが、垂直に設置した地中熱交換チュ
ーブ方式は、占有面積が狭く、また地表面のヒートロス
が少ない特徴がある。[0003] As the underground heat storage means, there are a groundwater tank system and an underground heat exchange tube system. There are two types of underground heat exchange tubes: one with a horizontally buried heat exchange tube and the other with a vertical installation.The vertically installed underground heat exchange tube method has a small occupied area and has a small surface area. There is little heat loss.
【０００４】地中に設置する熱交換チューブとしては、
十数ｍｍ径の鋼製Ｕ字管やプラスチック製のＵ字管があ
り、これらを垂直な削孔孔に１セットまたは２セット挿
入して周りをグラウト材で充填している。削孔深度は数
十ｍ〜約１００ｍに達するものがある。[0004] As a heat exchange tube installed underground,
There are steel U-shaped pipes and plastic U-shaped pipes with a diameter of more than ten mm, and one or two sets of these are inserted into vertical drilled holes and the surroundings are filled with a grout material. Some drilling depths reach several tens of meters to about 100 m.
【０００５】従来の熱交換チューブの地中設置方法は、
中空部を有するスクリューオーガを利用したホローステ
ムオーガ工法と呼ばれるものがある。この工法は、図８
および図９に示すように、三点杭打機３８のスクリュー
オーガ３０で削孔した後（図９Ａ）、オーガ３０の中空
部３０ａにクレーン３９等により仮ケーシング３２を吊
り下げて挿入し（図９Ｂ）、スクリューオーガ３０を引
抜く（図９Ｃ）。その後、仮ケーシング３２内に先端に
錘３３を備えた熱交換チューブ３４を挿入し（図９
Ｄ）、前記熱交換チューブ３４と共に挿入されたグラウ
ト注入パイプ３６からグラウト材３７を充填しながら仮
ケーシング３２を引抜く工程で設置される（図９Ｅ，図
９Ｆ）。なお、スクリューオーガ３０のビット３１につ
いては、これを削孔内に残すロストビット方式と、ワイ
ヤラインによって回収するワイヤライン回収ビット方式
がある。A conventional method of installing a heat exchange tube underground is as follows.
There is a so-called hollow stem auger method using a screw auger having a hollow portion. This method is shown in FIG.
As shown in FIG. 9 and after drilling with the screw auger 30 of the three-point pile driver 38 (FIG. 9A), the temporary casing 32 is suspended and inserted into the hollow portion 30a of the auger 30 by the crane 39 or the like (FIG. 9). 9B), the screw auger 30 is pulled out (FIG. 9C). Thereafter, a heat exchange tube 34 having a weight 33 at the tip is inserted into the temporary casing 32 (FIG. 9).
D), it is installed in a step of pulling out the temporary casing 32 while filling the grout material 37 from the grout injection pipe 36 inserted together with the heat exchange tube 34 (FIGS. 9E and 9F). As for the bit 31 of the screw auger 30, there are a lost bit method in which the bit 31 is left in the hole and a wire line collection bit method in which the bit 31 is collected by a wire line.
【０００６】前記仮ケーシング３２を用いるのは、スク
リューオーガ３０を引抜く際の孔壁崩壊を防止して、熱
交換チューブ３４を円滑に挿入するためである。The reason why the temporary casing 32 is used is to prevent the hole wall from collapsing when the screw auger 30 is pulled out, and to insert the heat exchange tube 34 smoothly.
【０００７】[0007]
【発明が解決しようとする課題】前記従来技術による熱
交換チューブの設置方法では、孔壁の保護および熱交換
チューブ３４のねじれを防止するため、スクリューオー
ガ３０による削孔後に、オーガ３０内に仮ケーシング３
２を設置していた。このため、作業工程が増加し、不経
済であり、且つ現地施工期間が長くかかる課題があっ
た。また、スクリューオーガ３０を用いた削孔としてい
るため、排出した掘削土砂の排土処分のための用地確保
および処分費用が必要となる課題もあった。In the method of installing a heat exchange tube according to the prior art, in order to protect the hole wall and to prevent the heat exchange tube 34 from being twisted, the hole is temporarily cut into the auger 30 after drilling by the screw auger 30. Casing 3
2 had been installed. Therefore, there is a problem that the number of work steps increases, which is uneconomical, and requires a long on-site construction period. In addition, since the drilling is performed by using the screw auger 30, there is another problem that it is necessary to secure a land for disposal of the excavated excavated soil and to dispose of the disposal cost.
【０００８】本発明は、上記のような従来技術の課題を
解消するため、削孔鋼管に先端のみに螺旋状の羽根を設
けた回転圧入鋼管を用いて無排土で削孔し、且つ仮ケー
シング工程を省略化して経済性、工期短縮等を図り、さ
らに熱交換チューブ内を流通させる熱媒体を周りの地中
熱と効率よく熱交換可能とする地中熱利用熱交換チュー
ブの設置方法を提供することを目的としたものである。[0008] In order to solve the above-mentioned problems of the prior art, the present invention uses a rotary press-fit steel pipe provided with a spiral blade only at the tip end of the drilled steel pipe, and drills the hole without discharging the soil. Eliminate the casing process to achieve economic efficiency and shorten the construction period.Furthermore, the installation method of the underground heat utilization heat exchange tube that allows the heat medium flowing through the heat exchange tube to efficiently exchange heat with the surrounding underground heat It is intended to provide.
【０００９】[0009]
【課題を解決するための手段】上記目的を達成するた
め、本発明では以下の構成を要旨とした。先端鋼管と削
孔鋼管のいずれか一方の先端部に螺旋状羽根を備え、前
記螺旋状羽根の下方または上方で先端が閉塞された先端
鋼管と離脱可能とされた削孔鋼管と、前記削孔鋼管で削
孔された孔内に挿入設置される熱媒体を流通させる熱交
換チューブと、熱交換チューブの周りの孔内にグラウト
材を充填するグラウト管およびグラウト材を準備し、先
端鋼管を装着した前記削孔鋼管を地中に回転・圧入して
所定の掘削深度まで到達させ、次いで削孔鋼管内に前記
熱交換チューブを挿入し、次に削孔鋼管を逆回転して先
端鋼管を切離して削孔鋼管を引抜き回収しながら同時に
熱交換チューブの周りの孔内にグラウト材を充填して熱
交換チューブを設置することを特徴とする地中熱利用熱
交換チューブの設置方法である。In order to achieve the above object, the present invention has the following features. A drilled steel pipe provided with a spiral blade at one of the distal ends of the tip steel pipe and the drilled steel pipe, wherein the drilled steel pipe whose tip is closed below or above the spiral blade is detachable from the drilled steel pipe; Prepare a heat exchange tube that allows the heat medium to be inserted and installed in the hole drilled by the steel pipe, and a grout tube and grout material that fill the grout material in the hole around the heat exchange tube, and attach the tip steel pipe. Rotate and press-fit the drilled steel pipe into the ground to reach a predetermined excavation depth, then insert the heat exchange tube into the drilled steel pipe, then reversely rotate the drilled steel pipe to separate the tip steel pipe. A method for installing a geothermal heat exchange tube, characterized in that the drilled steel tube is pulled out and collected while filling the grout material into a hole around the heat exchange tube and the heat exchange tube is installed.
【００１０】前記構成において、削孔鋼管の先端鋼管と
の離脱位置を螺旋状羽根の下方とし、離脱した羽根付の
削孔鋼管を逆回転しながら引抜き回収することができ
る。また、螺旋状羽根の上方で先端鋼管を離脱し、離脱
した羽根なしの削孔鋼管を非回転で引抜き回収するよう
にすることができる。[0010] In the above-mentioned structure, the position where the drilled steel pipe is separated from the tip steel pipe is located below the spiral blade, and the drilled steel pipe with the separated blade can be pulled out and collected while rotating in the reverse direction. Further, the tip steel pipe can be detached above the spiral blade, and the drilled steel pipe without the detached blade can be pulled out and collected without rotating.
【００１１】削孔鋼管内に挿入する熱交換チューブは、
その先端に錘を取付けて削孔鋼管内に挿入して、グラウ
ト材の充填時に熱交換チューブが浮上がることを防止す
るか、または、熱交換チューブ先端と対向する削孔鋼管
の先端鋼管に、あらかじめ自動装着可能な連結具を取付
けておき、熱交換チューブを削孔鋼管内に挿入した際、
自動的に先端が削孔鋼管の先端鋼管に連結して反力をと
るようにしてもよい。前記自動装着可能な連結具は、一
方を円錐状連結片の雄連結具とし、他方をバネで付勢さ
れた雌連結具を用い、熱交換チューブの挿入時の押込み
力で自動的に連結具が装着する装置を用いることができ
る。The heat exchange tube inserted into the drilled steel pipe is
Attach the weight to the tip and insert it into the drilled steel pipe to prevent the heat exchange tube from floating when filling the grout material, or to the tip steel pipe of the drilled steel pipe facing the heat exchange tube tip, When a heat exchange tube is inserted into a drilled steel pipe,
The tip may be automatically connected to the tip steel pipe of the drilled steel pipe to take a reaction force. The connector which can be automatically mounted is one in which a male connector of a conical connecting piece is used, and the other is a female connector which is biased by a spring, and is automatically connected by a pushing force at the time of insertion of the heat exchange tube. Can be used.
【００１２】さらに、熱交換チューブの周りの孔内に充
填するグラウト材として、伝熱特性に優れた粉体或いは
粒状の伝熱材と硬化性材料を混合した流動状態の伝熱充
填材を用いることができる。Further, as a grouting material to be filled in the hole around the heat exchange tube, a fluidized heat transfer filler obtained by mixing a powdery or granular heat transfer material having excellent heat transfer characteristics and a curable material is used. be able to.
【００１３】すなわち、本発明は、以下の特徴を有する
地中熱利用熱交換チューブの設置方法である。That is, the present invention is a method for installing a geothermal heat exchange tube having the following features.
【００１４】熱交換チューブを挿入する掘削孔は、こ
れを先端部のみに螺旋状羽根を備えた削孔鋼管を用いて
無排土で削孔可能とした。The excavation hole into which the heat exchange tube is inserted can be drilled without soil removal by using a drilled steel pipe having a spiral blade only at the tip.
【００１５】削孔内に熱交換チューブを挿入後、グラ
ウト材を注入しながら削孔鋼管の先端鋼管を離脱して引
抜き回収し、仮ケーシングなしで熱交換チューブを削孔
に挿入可能とした。After inserting the heat exchange tube into the drilled hole, the tip end steel tube of the drilled steel tube was separated and pulled out and recovered while pouring the grout material, so that the heat exchange tube could be inserted into the drilled hole without a temporary casing.
【００１６】削孔鋼管を引抜き回収する手段におい
て、先端鋼管との離脱を削孔時と逆方向の回転によって
行うが、離脱位置を羽根の下方とした場合は、離脱した
羽根付の削孔鋼管に逆回転力を与えながら引抜き回収
し、また、羽根の上方で離脱させた場合は、羽根なしの
削孔鋼管を非回転で引抜くこととした。In the means for pulling out and recovering the drilled steel pipe, separation from the tip steel pipe is performed by rotation in the direction opposite to the direction of drilling, but when the separation position is below the blade, the drilled steel pipe with the separated blade is used. In the case where the steel pipe was collected by pulling it while applying a reverse rotation force to the steel pipe, and when the steel pipe was detached above the blade, the drilled steel pipe without the blade was pulled out without rotation.
【００１７】削孔内に挿入した熱交換チューブの周り
にグラウト材を充填する際、浮力による浮上がりを防止
するために、熱交換チューブの先端に錘を取付けるか、
または離脱して地中に残す先端鋼管と熱交換チューブ先
端の両方にあらかじめ自動装着可能な連結具を取付けて
おき、熱交換チューブを挿入する際、自動的に連結して
反力をとることとした。前記自動装着可能な連結具は、
一方を円錐状連結片の雄連結具とし、他方をバネで付勢
された雌連結具を用い、熱交換チューブの挿入時の押込
み力で自動的に一方の連結具が他方の連結具に装着でき
るようにしたものを使用することができる。When filling the grout material around the heat exchange tube inserted into the drilled hole, a weight may be attached to the tip of the heat exchange tube in order to prevent floating due to buoyancy.
Alternatively, a connector that can be automatically attached is attached to both the tip steel pipe and the end of the heat exchange tube that are separated and left in the ground, and when the heat exchange tube is inserted, it is automatically connected to take the reaction force. did. The automatically attachable coupling tool,
One connector is a male connector with a conical connection piece, and the other is a female connector biased by a spring. One connector is automatically attached to the other connector by the pushing force when inserting the heat exchange tube. Anything that can be used can be used.
【００１８】熱交換チューブの周りの孔内に充填する
グラウト材として、伝熱特性に優れた粉体或いは粒状の
伝熱材と硬化性材料を混合した流動状態の伝熱充填材を
用いると、熱交換チューブ内を流通させる熱媒体を周り
の地中熱と効率よく熱交換できる。As a grouting material to be filled in the hole around the heat exchange tube, a fluidized heat transfer filler obtained by mixing a powdery or granular heat transfer material having excellent heat transfer characteristics and a curable material is used. The heat medium flowing through the heat exchange tube can efficiently exchange heat with surrounding ground heat.
【００１９】[0019]
【発明の実施形態】次に本発明の一実施形態を説明す
る。図１は本発明に係る一実施形態の地中熱利用熱交換
チューブの設置方法の手順を示したもので、図２、図３
は本発明に用いる削孔鋼管の先端部離脱手段の実施形態
を示した断面図、図４〜図６は削孔鋼管内に挿入する熱
交換チューブが充填グラウト材の浮力によって浮上がる
ことを防止する手段を示したものである。図７は地中に
設置されるＵ字型熱交換チューブの配置（断面図）であ
って、２組を交差配置（Ａ）したものと1組配置（Ｂ）
したものを示す。Next, an embodiment of the present invention will be described. FIG. 1 shows a procedure of an installation method of an underground heat utilization heat exchange tube according to an embodiment of the present invention.
FIG. 4 is a cross-sectional view showing an embodiment of means for detaching the tip end of a drilled steel pipe used in the present invention. FIGS. FIG. FIG. 7 is an arrangement (cross-sectional view) of a U-shaped heat exchange tube installed in the ground, where two sets are crossed (A) and one set (B).
This is shown.
【００２０】まず、本発明によって熱交換チューブ６を
地中に設置するにあたって準備する装置、材料について
説明する。First, an apparatus and materials to be prepared for installing the heat exchange tube 6 in the ground according to the present invention will be described.
【００２１】＜削孔鋼管＞本発明に用いる削孔鋼管１
は、先端部に螺旋状羽根４を備えたもので、前記螺旋状
羽根４の下方または上方で先端が閉鎖された鋼管２ａか
らなる先端鋼管２と切離し離脱可能としている。（離脱
された先端側の削孔鋼管は先端鋼管２という。）<Drilled steel pipe> Drilled steel pipe 1 used in the present invention
Is provided with a spiral blade 4 at the distal end, and can be separated and separated from the distal steel pipe 2 composed of a steel pipe 2a having a closed distal end below or above the spiral blade 4. (The drilled steel pipe on the tip side that has been detached is called tip steel pipe 2.)
【００２２】削孔鋼管の先端部に螺旋状の羽根４を備え
たのは、削孔鋼管１を回転圧入する際の排土を生じさせ
ないためである。従来用いられている中空スクリューオ
ーガ３０は、その全長にわたって羽根３５を有するため
に、削孔時に地上に掘削土砂を排土するため、この掘削
土砂の処分に困っていたが、本発明のように、先端部の
みに羽根４を設けた場合は、排土なしで削孔できる。削
孔鋼管１の先端部に備えた螺旋状羽根４は、回転圧入杭
として使用されているものと同じように鋼管外径の1.5
〜2倍程度の外径とする。The reason why the spiral blades 4 are provided at the tip of the drilled steel pipe is to prevent earth removal when the drilled steel pipe 1 is press-fitted by rotation. The conventionally used hollow screw auger 30 has the blades 35 over the entire length thereof, so that the excavated earth and sand is discharged to the ground during drilling. In the case where the blades 4 are provided only at the tip, the holes can be drilled without discharging the soil. The spiral blade 4 provided at the tip of the drilled steel pipe 1 has a steel pipe outer diameter of 1.5 in the same manner as a rotary press-fitting pile.
Outer diameter of about 2 times.
【００２３】この削孔鋼管１は、熱交換チューブ６を挿
入後、地上に回収するため、熱交換チューブ６を挿入後
に、先端鋼管２を離脱する必要がある。In order to collect the drilled steel pipe 1 on the ground after inserting the heat exchange tube 6, it is necessary to separate the tip steel pipe 2 after inserting the heat exchange tube 6.
【００２４】図２は螺旋状羽根４の下方で離脱する場合
の例を示したもので、離脱される先端鋼管２は、回収さ
れる削孔鋼管１側の鋼管本体３の内径よりもわずかに小
さい外径の短尺鋼管２ａからなる接合材２ｅと、その下
端部に鋼管本体３の外径とほぼ等しい鋼製円形の底蓋２
ｂを溶接等により固着して備えており、前記接合材２ｅ
の外周側面には、底蓋２ｂから上方に離なれた位置にお
いて鋼管本体３の外径よりも突出しないように複数の突
起２ｃ（図示の場合は２個）が周方向に等角度間隔をお
いて設けられている。FIG. 2 shows an example in which the tip steel pipe 2 is detached below the spiral blade 4, and the tip steel pipe 2 detached is slightly smaller than the inner diameter of the steel pipe body 3 on the side of the drilled steel pipe 1 to be recovered. A joining material 2e composed of a short steel pipe 2a having a small outer diameter, and a steel circular bottom cover 2 having a lower end portion substantially equal to the outer diameter of the steel pipe body 3
b is fixedly provided by welding or the like.
A plurality of projections 2c (two in the illustrated case) are arranged at equal angular intervals in the circumferential direction on the outer peripheral side so as not to protrude beyond the outer diameter of the steel pipe main body 3 at a position separated upward from the bottom lid 2b. It is provided.
【００２５】一方、鋼管本体３の下端部には、突起２ｃ
よりも幅が若干広く、下面に開口する縦切込み３ｃとそ
の上部に接続する水平な横切込み３ｄからなる複数の鍵
形切込み３ｂ（図示の場合は２個所）が周方向に等角度
間隔をおいて設けられている。このように、先端鋼管２
に固定した削孔鋼管内に嵌合可能な接合材２ｅに突起２
ｃを設け、この突起２ｃを嵌合する削孔鋼管側に形成し
た鍵形切込み３ｂに嵌めこむ連結部３ａを円周方向２ヶ
所設けたものであって、削孔鋼管１を逆回転することで
装着離脱できるようにしたものである。離脱後は削孔鋼
管１側に螺旋状羽根４が付いた状態となるため，削孔鋼
管１に逆方向の回転を与えて地上に引抜くことができ
る。On the other hand, at the lower end of the steel pipe main body 3, a projection 2c is provided.
A plurality of key-shaped cuts 3b (two places in the drawing), which are slightly wider than the vertical cut 3c opening on the lower surface and a horizontal cut 3d connected to the upper part thereof, are spaced at equal angular intervals in the circumferential direction. It is provided. Thus, the tip steel pipe 2
Material 2e that can be fitted into a drilled steel pipe fixed to
c, and two connecting portions 3a to be fitted in the key-shaped notches 3b formed on the side of the drilled steel pipe to which the projections 2c are fitted are provided in two places in the circumferential direction, and the drilled steel pipe 1 is rotated in the reverse direction. It can be attached and detached with After detachment, the spiral blades 4 are attached to the drilled steel pipe 1 side, so that the drilled steel pipe 1 can be given a reverse rotation and pulled out to the ground.
【００２６】図３は螺旋状羽根４の上方で離脱するよう
にしたもので、離脱手段は、先端鋼管２側に複数の内向
き突起２ｃを設けた鋼管からなる接合材２ｅを固定し
て、回収される削孔鋼管１側の下端部に嵌合して溶接に
より固着した連結用鋼管２ａに前記と同様に複数の鍵形
切込み３ｂを設け、これに嵌合させるようにしている。
その他の構成は上記と同様である。離脱後は先端鋼管２
側に螺旋状羽根４が付いた状態となり、削孔鋼管１側に
は螺旋状羽根４はないため、削孔鋼管１（鋼管本体３）
の引抜きは非回転で引抜き力を加えて行なう。FIG. 3 shows a structure in which the material is separated above the spiral blade 4. The separating means fixes a joining material 2 e made of a steel pipe provided with a plurality of inward projections 2 c on the tip steel pipe 2 side. A plurality of key-shaped cuts 3b are provided in the connecting steel pipe 2a fitted to the lower end of the drilled steel pipe 1 to be recovered and fixed by welding in the same manner as described above, and fitted to this.
Other configurations are the same as above. After leaving, the tip steel pipe 2
Side is provided with a spiral blade 4, and there is no spiral blade 4 on the side of the drilled steel pipe 1, so the drilled steel pipe 1 (steel pipe body 3)
Is performed by applying a pulling force without rotating.
【００２７】なお、先端鋼管２の下部に設けている小径
の螺旋羽根５は、大深度削孔する場合や硬質地盤の場合
に削孔抵抗を減じるためのものであって、削孔深度が浅
い場合や軟弱地盤では必ずしも必要ではない。The small-diameter spiral blade 5 provided at the lower part of the tip steel pipe 2 is for reducing drilling resistance when drilling at a large depth or in the case of hard ground, and has a shallow drilling depth. It is not always necessary in case or soft ground.
【００２８】また、削孔鋼管１は、その全長が数十ｍ〜
１００ｍ長さになるため、数ｍ定尺長のものをネジ接合
して延長する。ネジ接合部は逆回転した場合に外れない
ように、ロックピン等で拘束する必要がある（図示を省
略した）。The drilled steel pipe 1 has a total length of several tens of meters.
Since it has a length of 100 m, a fixed length of several meters is joined by screws and extended. The screw joint needs to be restrained by a lock pin or the like (not shown) so that the screw joint does not come off when rotated in the reverse direction.
【００２９】＜熱交換チューブ＞熱交換チューブ６はス
テンレス製のチューブを使用してもよいが、フレキシブ
ルなプラスチック製で１／２〜１・１／２インチ程度の
外径のものを２本並列し、一端を連通してＵ字状にした
ものを設置深度分リールに巻いたものを使用するのがよ
い。この熱交換チューブ６は削孔鋼管１内に挿入した
後、グラウト材１１を充填すると浮力で浮上がるのを防
止する必要がある。図４〜図６は浮上がり防止対策の例
を示したものである。<Heat Exchange Tube> The heat exchange tube 6 may be a stainless steel tube, but is made of two flexible plastics having an outer diameter of about 1/2 to 1/2 inch. It is preferable to use a U-shaped one connected to one end and wound on a reel for the installation depth. When the heat exchange tube 6 is inserted into the drilled steel pipe 1 and then filled with the grout material 11, it is necessary to prevent the heat exchange tube 6 from floating by buoyancy. 4 to 6 show examples of countermeasures against floating.
【００３０】図４に示すものは、従来から用いられてい
る簡易な手段で熱交換チューブ６の先端のチューブ受金
具１６に、浮力に勝る錘７を一体に取付けた例である。FIG. 4 shows an example in which a weight 7 which excels in buoyancy is integrally attached to a tube receiving member 16 at the tip of the heat exchange tube 6 by a simple means conventionally used.
【００３１】図５は削孔鋼管１内に挿入した熱交換チュ
ーブ６を自動連結手段で削孔先端部の地中に残す先端鋼
管２と連結して反力をとり、グラウト材充填時の浮上り
を防止した例を示すものである。この連結手段は、先端
鋼管２と熱交換チューブ６先端の両方に、あらかじめ自
動装着可能な連結具８（８ａ，８ｂ）を取付けておき、
熱交換チューブ６を削孔鋼管１内に挿入する際、自動的
に連結するようにしたものである。FIG. 5 shows that the heat exchange tube 6 inserted into the drilled steel pipe 1 is connected to the tip steel pipe 2 left in the ground at the tip of the drilled hole by an automatic connecting means to take a reaction force and to float when filling the grout material. FIG. This connecting means includes connecting tools 8 (8a, 8b) which can be automatically attached in advance to both the tip steel pipe 2 and the heat exchanging tube 6 tip.
When the heat exchange tube 6 is inserted into the drilled steel pipe 1, it is automatically connected.
【００３２】前記自動装着可能な連結具８は、一方を円
錐状部８ｃの下面を係止部８ｄとして備えている円錐状
連結片の雄連結具８ａとし、他方を雄連結具８ａに嵌合
するバネ８ｅで相互に接近する方向に付勢された一対の
把持片８ｆを備えた雌連結具８ｂとし、各把持片８ｆの
先端面（図示の場合は下端面）は横軸１５を中心として
拡径しやすいようにガイド部とされ、熱交換チューブ６
の挿入時の押込み力で自動的に、一方の雄連結具８ａに
他方の雌連結具８ｂに装着でき、連結具８ａ、８ｂ相互
を装着できるようにしたものである。なお、図中符号１
７は、各把持片８ｆとチューブ受金具１６を横軸１８に
より連結する連結板である。One of the automatically attachable connecting members 8 is a male connecting member 8a of a conical connecting piece having one lower surface of a conical portion 8c as a locking portion 8d, and the other is fitted to the male connecting member 8a. A female connector 8b having a pair of gripping pieces 8f urged in a direction approaching each other by a spring 8e, and a distal end face (lower end face in the illustrated case) of each gripping piece 8f is centered on a horizontal axis 15. The heat exchange tube 6 serves as a guide so that the diameter can be easily expanded.
With the pushing force at the time of insertion, the male connector 8a can be automatically attached to the other female connector 8b, and the connectors 8a and 8b can be attached to each other. In the figure, reference numeral 1
Reference numeral 7 denotes a connecting plate that connects each gripping piece 8f and the tube receiving member 16 by a horizontal axis 18.
【００３３】図６は上記連結具８にスイベルジョイント
（回転継手）９ｃを付加したスイベルジョイント付き連
結具９を示したものであって、削孔鋼管１を回転して引
抜き回収する場合に、挿入した熱交換チューブ６を共回
り可能として、熱交換チューブ６のねじれが生じないよ
うにしたものである。図６では、底蓋２ｂに中央部に同
心状に固定される縦軸８ｇと円錐状部８ｃの下部縦軸８
ｈの中間部にスイベルジョイント９ｃが設けられてい
る。FIG. 6 shows a connecting tool 9 with a swivel joint in which a swivel joint (rotary joint) 9c is added to the connecting tool 8, which is inserted when the drilled steel pipe 1 is rotated to be pulled out and collected. The heat exchanging tube 6 is made rotatable so that the heat exchanging tube 6 is not twisted. In FIG. 6, a vertical axis 8g fixed concentrically to the bottom lid 2b at the center and a lower vertical axis 8 of the conical section 8c are shown.
A swivel joint 9c is provided at an intermediate portion of h.
【００３４】熱交換チューブ６は深度方向の適宜間隔毎
に図７に示すようにスペーサ１０で適正配置に保持する
必要がある。図７は地中に設置されるＵ字型の熱交換チ
ューブ６の配置（断面図）であり、（Ａ）は２組を交差
配置した場合であり、（Ｂ）は１組配置した場合であ
る。As shown in FIG. 7, the heat exchange tubes 6 need to be properly arranged by spacers 10 at appropriate intervals in the depth direction. FIG. 7 shows an arrangement (cross-sectional view) of the U-shaped heat exchange tubes 6 installed in the ground. (A) shows a case where two sets are intersected, and (B) shows a case where one set is arranged. is there.
【００３５】＜グラウト材とグラウト管＞削孔内に挿入
した熱交換チューブ６の周りには、削孔鋼管１を引上げ
ながらグラウト材１１が充填される。このグラウト材１
１は、従来と同様にベントナイトとセメント、モルタル
を混合してスラリー状にしたものを用いてもよいが、伝
熱特性の優れた炭素粉、炭素粒、鉄粉、メタルスラグ粉
（粒）を用いると熱交換チューブ６内を流通する熱媒体
に孔周りの地中熱を効率よく伝達して蓄熱・集熱でき
る。上記グラウト材１１は底部から上方に引上げながら
充填するグラウト管１２を削孔鋼管内に挿入配置する。<Grout Material and Grout Tube> Around the heat exchange tube 6 inserted into the drilled hole, the grout material 11 is filled while pulling up the drilled steel tube 1. This grout material 1
1 may be a slurry obtained by mixing bentonite, cement, and mortar in the same manner as before, but carbon powder, carbon particles, iron powder, and metal slag powder (particles) having excellent heat transfer characteristics may be used. When used, the underground heat around the hole is efficiently transmitted to the heat medium flowing through the heat exchange tube 6 to allow heat storage and heat collection. The grout material 11 is arranged by inserting a grout pipe 12 to be filled into the drilled steel pipe while pulling it upward from the bottom.
【００３６】以下、本発明に係る地中熱利用熱交換チュ
ーブの設置方法の手順を説明する。Hereinafter, the procedure of the method of installing the geothermal heat exchange tube according to the present invention will be described.
【００３７】＜実施形態１＞図１Ａ〜Ｅは、本発明に係
る実施形態１の例であって、削孔鋼管１の螺旋状羽根４
の下方で離脱して削孔鋼管１を逆回転して引抜き回収
し、削孔鋼管１内に挿入した熱交換チューブ６を自動連
結手段で先端鋼管２と連結してグラウト材充填時の浮上
りを防止した地中熱利用熱交換チューブの設置方法の手
順を示したものである。Embodiment 1 FIGS. 1A to 1E show an example of Embodiment 1 according to the present invention, in which a spiral blade 4 of a drilled steel pipe 1 is shown.
And the heat exchange tube 6 inserted into the drilled steel pipe 1 is connected to the tip steel pipe 2 by automatic connection means to lift up when filling the grout material. It shows the procedure of the installation method of the underground heat utilization heat exchange tube which prevented the problem.
【００３８】Ａ ：削孔鋼管の施工工程（図１（Ａ）参
照） 前述の図６に示すような先端鋼管２内側にスイベルジョ
イント付連結具９を固定した先端鋼管２を削孔鋼管１の
先端に装着し、杭の施工に用いられる三点杭打ち機とオ
ーガーを組み合わせた回転圧入機（図示省略）等を使用
して回転圧入して地中に削孔する。削孔鋼管１は、輸送
可能な定尺管をネジ接合して接続延長して行う。図１
（Ｂ）は削孔を完了し、所定深度に到達した状態を示
す。A: Construction process of drilled steel pipe (refer to FIG. 1 (A)) The tip steel pipe 2 in which the connecting tool 9 with a swivel joint is fixed inside the tip steel pipe 2 as shown in FIG. It is mounted on the tip and drilled in the ground by rotary press-fitting using a rotary press-fitting machine (not shown) combining a three-point pile driver and auger used for pile construction. The drilled steel pipe 1 is connected and extended by screwing a transportable fixed length pipe. FIG.
(B) shows a state in which drilling has been completed and has reached a predetermined depth.
【００３９】Ｃ：熱交換チューブの挿入工程（図１
（Ｃ）参照） 削孔鋼管１が所定深度に到達したら、地上から削孔鋼管
１内にＵ字状の熱交換チューブ６を挿入する。C: Step of inserting heat exchange tube (FIG. 1)
When the drilled steel pipe 1 reaches a predetermined depth, the U-shaped heat exchange tube 6 is inserted into the drilled steel pipe 1 from the ground.
【００４０】熱交換チューブ６は挿入時には深度方向の
適宜間隔毎にスペーサー１０を取付け適正配置に保持す
る。また、挿入する熱交換チューブ６の先端には、前記
先端鋼管２の雄連結具９ａに自動的に嵌合する雌連結具
９ｂをあらかじめ取付けておき、熱交換チューブ６を削
孔鋼管１内に挿入する際、自動的に先端鋼管２側の連結
具９ａに連結させる。この実施形態に示す自動装着可能
な連結具９は、先端鋼管２側を円錐状連結片の雄連結具
９ａとし、他方（熱交換チューブ６の先端部）を雄連結
具９ａに嵌合するバネ８ｅで付勢された雌連結具９ｂと
したもので、熱交換チューブ６の挿入時の押込み力で自
動的に雌側の連結具９ｂが開いて連結できるようにした
ものである。先端鋼管２と連結された熱交換チューブ６
は，スイベルジョイント９ｃで回転フリーとなってい
る。At the time of insertion, the spacers 10 are attached to the heat exchange tubes 6 at appropriate intervals in the depth direction to hold them in an appropriate arrangement. At the tip of the heat exchange tube 6 to be inserted, a female connector 9b that is automatically fitted to the male connector 9a of the tip steel pipe 2 is attached in advance, and the heat exchange tube 6 is inserted into the bored steel pipe 1. At the time of insertion, it is automatically connected to the connecting tool 9a on the tip steel pipe 2 side. The automatically attachable connecting tool 9 shown in this embodiment has a male connector 9a of a conical connecting piece on the tip steel pipe 2 side, and the other (the distal end of the heat exchange tube 6) fitted to the male connecting tool 9a. The female connector 9b urged at 8e is used, and the female connector 9b can be automatically opened and connected by a pushing force when the heat exchange tube 6 is inserted. Heat exchange tube 6 connected to tip steel tube 2
Is free to rotate at the swivel joint 9c.
【００４１】Ｄ：削孔鋼管の引上げとグラウト充填工程
（図１（Ｄ）参照） 削孔鋼管１内に熱交換チューブ６の挿入連結が完了した
ら、削孔鋼管１に削孔時と逆方向の回転（逆回転）を与
えて削孔鋼管１における鋼管本体３を上昇させて、先端
鋼管２と削孔鋼管１を離脱させる。D: Step of pulling up the drilled steel pipe and filling grout (see FIG. 1 (D)) When the insertion and connection of the heat exchange tube 6 into the drilled steel pipe 1 are completed, the direction opposite to the direction of drilling the drilled steel pipe 1 (Reverse rotation) to raise the steel pipe main body 3 in the drilled steel pipe 1 to separate the tip steel pipe 2 and the drilled steel pipe 1.
【００４２】続いて削孔鋼管１に逆回転を与えると、螺
旋羽根４によって削孔鋼管１は上方に引抜かれる。な
お、逆転の駆動トルクが大きい場合は、引抜き力をさら
に付加して助勢する。削孔鋼管１の引き抜きに先立っ
て、削孔鋼管１内には、グラウト管１２を挿入してお
き、削孔鋼管１の引抜きに応じて、地上のグラウトミキ
サーでスラリー状にしたグラウト材１１をグラウト管１
２を通じて充填する。この際、グラウト管は徐々に引上
げ充填圧力が過大にならないようにする。Subsequently, when the drilled steel pipe 1 is given reverse rotation, the drilled steel pipe 1 is pulled upward by the spiral blade 4. If the reverse driving torque is large, the pulling force is further added to assist. Prior to withdrawal of the drilled steel pipe 1, a grout pipe 12 is inserted into the drilled steel pipe 1, and in accordance with the withdrawal of the drilled steel pipe 1, the grout material 11 slurried with a ground grout mixer is used. Grout tube 1
Fill through 2. At this time, the grout tube is gradually pulled up so that the filling pressure does not become excessive.
【００４３】削孔鋼管１の引抜きにあたっては、これを
構成している複数の鋼管本体３の定尺長さのものをネジ
接合を解除して回収しながら行う。When the drilled steel pipe 1 is pulled out, a plurality of steel pipe main bodies 3 constituting the same are removed while the screw connection is released and collected.
【００４４】削孔鋼管１の引抜きは、削孔鋼管１を逆回
転しながら行うが、削孔鋼管１内の熱交換チューブ６は
前記のようにスイベルジョイント９ｃを介して連結され
ているため共回りしなくねじれによる損傷が生じない。
図１（Ｅ）は削孔鋼管１の引抜き回収が完了し、熱交換
チューブ６の周りにグラウト材１１が充填された状態を
示したものであって、グラウト材１１が硬化したら地中
熱利用熱交換チューブの設置を完成する。The drilled steel pipe 1 is pulled out while rotating the drilled steel pipe 1 in the reverse direction. However, since the heat exchange tubes 6 in the drilled steel pipe 1 are connected via the swivel joint 9c as described above, they are commonly used. No rotation and no damage due to twisting.
FIG. 1 (E) shows a state where the drawing and collection of the drilled steel pipe 1 is completed and the grout material 11 is filled around the heat exchange tube 6, and when the grout material 11 is hardened, the ground heat utilization is performed. Complete the installation of heat exchange tubes.
【００４５】＜実施形態２＞この実施形態は、削孔鋼管
１の螺旋状羽根４の上方で離脱して、削孔鋼管１（鋼管
本体３）を非回転で引抜き回収し、削孔鋼管１内に挿入
した熱交換チューブ６を自動連結手段で、先端鋼管２と
連結してグラウト材充填時の浮上りを防止した地中熱利
用熱交換チューブの設置方法である。<Embodiment 2> In this embodiment, the drilled steel pipe 1 (steel pipe main body 3) is detached above the spiral blade 4 of the drilled steel pipe 1 and pulled out and recovered without rotating. This is a method of installing a heat exchange tube utilizing underground heat, in which the heat exchange tube 6 inserted into the inside is connected to the tip steel pipe 2 by automatic connection means to prevent the floating when filling the grout material.
【００４６】削孔鋼管１の施工工程において、削孔鋼管
１の先端に装着する先端鋼管２は図５に示すようなスイ
ベルジョイント９ｃなしの連結具８を用いてもよい。
（もちろんスイベルジョイント付き連結具９としてもよ
い）In the construction process of the drilled steel pipe 1, a connecting tool 8 without a swivel joint 9c as shown in FIG. 5 may be used for the distal steel pipe 2 attached to the distal end of the drilled steel pipe 1.
(Of course, it may be a connecting tool 9 with a swivel joint)
【００４７】削孔鋼管１の回転圧入施工は、前記実施形
態１と同様に定尺長のものをネジ接合しながら回転圧入
機で行う。The rotary press-fitting of the drilled steel pipe 1 is performed by a rotary press-fitting machine while screwing a fixed length one in the same manner as in the first embodiment.
【００４８】熱交換チューブ６を挿入する作業も前記実
施形態１と同様に行う。但し、先端鋼管２と連結された
熱交換チューブ６はスイベルジョイント９ｃがない場合
は、削孔鋼管１内で自由に回転することはできない点が
異なる。The operation of inserting the heat exchange tube 6 is performed in the same manner as in the first embodiment. However, the difference is that the heat exchange tube 6 connected to the tip steel pipe 2 cannot rotate freely in the drilled steel pipe 1 if there is no swivel joint 9c.
【００４９】削孔鋼管１の引上げ作業において、先端鋼
管２と削孔鋼管１を離脱させる手段は、前記実施形態１
と同様であるが、離脱した削孔鋼管２には、先端部に螺
旋羽根４がないため引抜きは非回転で行う。従って、削
孔鋼管１内の熱交換チューブ６は回転できなくてもねじ
れなどは生じない。グラウト材１１の充填作業は、前記
実施形態１と同様に行う。In the lifting operation of the drilled steel pipe 1, the means for separating the tip steel pipe 2 and the drilled steel pipe 1 is as described in the first embodiment.
However, since the drilled steel pipe 2 that has been separated has no spiral blade 4 at the tip, the drawing is performed without rotation. Therefore, even if the heat exchange tube 6 in the drilled steel pipe 1 cannot rotate, twisting does not occur. The filling operation of the grout material 11 is performed in the same manner as in the first embodiment.
【００５０】＜実施形態３＞この実施形態は、前記実施
形態１および実施形態２における熱交換チューブ６のグ
ラウト材充填時の浮上り防止を、自動連結手段とせず、
図４に示すように熱交換チューブ先端に錘７を取付けて
行う地中熱利用熱交換チューブの設置方法である。熱交
換チューブ６の挿入作業は、単に削孔鋼管１内に地上か
ら熱交換チューブ６を挿入するのみである。<Embodiment 3> This embodiment does not use the automatic connection means to prevent the heat exchange tube 6 from rising when filling the grout material in the first and second embodiments.
This is a method of installing a ground heat utilizing heat exchange tube by attaching a weight 7 to the tip of the heat exchange tube as shown in FIG. The operation of inserting the heat exchange tube 6 simply involves inserting the heat exchange tube 6 into the drilled steel pipe 1 from the ground.
【００５１】この実施形態３において、実施形態１のよ
うに削孔鋼管１を逆回転して引抜く場合は、削孔鋼管１
内に挿入した熱交換チューブ６が共回りできるように地
上部にスイベル付吊具で保持したほうが望ましい。他の
工程は前記実施形態１、実施形態２と同様とするため説
明を省く。In the third embodiment, when the drilled steel pipe 1 is to be pulled out by reverse rotation as in the first embodiment, the drilled steel pipe 1
It is desirable to hold the heat exchange tube 6 inserted therein with a hanger with a swivel on the ground so that it can rotate together. The other steps are the same as those in the first and second embodiments, and thus the description is omitted.
【００５２】＜実施形態４＞この実施形態は、前記実施
形態１から実施形態３において使用するグラウト材１１
として伝熱特性の優れた炭素粉、炭素粒、鉄粉、メタル
スラグ粉（粒）をセメント・モルタルの硬化材に混合し
てスラリー状としたものを用いたものである。作業工程
は前記と同様にすればよい。この実施形態では熱交換チ
ューブ６内を流通する熱媒体に孔周りの地中熱を効率よ
く伝達して蓄熱・集熱できる。<Embodiment 4> In this embodiment, the grout material 11 used in Embodiments 1 to 3 is used.
And a slurry obtained by mixing carbon powder, carbon particles, iron powder, and metal slag powder (particles) having excellent heat transfer properties with a hardening material of cement / mortar. The working steps may be the same as described above. In this embodiment, the underground heat around the hole can be efficiently transferred to the heat medium flowing through the heat exchange tube 6 to store and collect heat.
【００５３】[0053]
【発明の効果】本発明によれば、先端部のみに螺旋状羽
根を設けた回転圧入鋼管を用いて無排土で削孔し、削孔
内に熱交換チューブを挿入後、グラウト材を充填しなが
ら削孔鋼管を先端鋼管と切離し離脱して引抜き、仮ケー
シングなしで熱交換チューブを削孔に挿入設置可能とし
たため、排土処分が不要となり、熱交換チューブ設置工
事の経済性、工期短縮等を図ることができる。According to the present invention, a hole is drilled without soil removal using a rotary press-fit steel pipe having a spiral blade only at the tip, and a grout material is filled after inserting a heat exchange tube into the hole. Cutting and removing the drilled steel pipe from the tip steel pipe while pulling it out, and the heat exchange tube can be inserted and installed in the drilled hole without a temporary casing. Etc. can be achieved.
【００５４】さらに、熱交換チューブの周りの孔内に充
填するグラウト材として伝熱特性に優れた粉体或いは粒
状の伝熱材と硬化性材料を混合した流動状態の伝熱充填
材を用いれば、熱交換チューブ内を流通させる熱媒体を
周りの地中熱と効率よく熱交換可能とした地中熱利用熱
交換チューブの設置ができる。Further, as a grouting material to be filled in the hole around the heat exchange tube, a powdery heat-exchange material or a fluidized heat-transfer filler obtained by mixing a granular heat-transfer material and a curable material is used. In addition, it is possible to install a ground heat utilization heat exchange tube that enables a heat medium flowing through the heat exchange tube to efficiently exchange heat with surrounding ground heat.
【図１】本発明の第１実施形態に係る地中熱利用熱交換
チューブの設置手順図である。FIG. 1 is an installation procedure diagram of an underground heat utilization heat exchange tube according to a first embodiment of the present invention.
【図２】（Ａ）は、螺旋状羽根の下方で先端鋼管と鋼管
本体とが離脱する場合（羽根が鋼管本体に取付けられて
いる場合）における鋼管本体および先端鋼管を示す断面
図であり、（Ｂ）は、（Ａ）のＡ−Ａ断面図である。FIG. 2A is a cross-sectional view showing the steel pipe main body and the tip steel pipe when the tip steel pipe and the steel pipe main body are separated below the spiral blade (when the blade is attached to the steel pipe main body); (B) is an AA sectional view of (A).
【図３】（Ａ）は、螺旋状羽根の上方で先端鋼管と鋼管
本体とが離脱する場合（羽根が先端鋼管に取付けられて
いる場合）における鋼管本体および先端鋼管を示す断面
図であり、（Ｂ）は、（Ａ）のＢ−Ｂ断面図である。FIG. 3A is a cross-sectional view showing the steel pipe main body and the tip steel pipe when the tip steel pipe and the steel pipe main body are separated from each other above the spiral blade (when the blade is attached to the tip steel pipe); (B) is a BB cross-sectional view of (A).
【図４】熱交換チューブ先端に錘を取付けた場合におけ
る削孔鋼管の断面図である。FIG. 4 is a cross-sectional view of a drilled steel pipe when a weight is attached to the tip of the heat exchange tube.
【図５】先端鋼管と熱交換チューブ先端とに自動装着可
能な連結具を取付けた場合において、連結具を連結した
状態の削孔鋼管の断面図である。FIG. 5 is a cross-sectional view of a drilled steel pipe in a state where the connecting tool is connected when a connecting tool that can be automatically mounted is attached to the tip steel pipe and the heat exchange tube tip.
【図６】先端鋼管と熱交換チューブ先端とに自動装着可
能なスイベルジョイント付き連結具を取付けた場合にお
いて、連結具を連結した状態の削孔鋼管の断面図であ
る。FIG. 6 is a cross-sectional view of the drilled steel pipe in a state where the connecting tool is connected when a connecting tool with a swivel joint that can be automatically mounted is attached to the tip steel pipe and the heat exchange tube tip.
【図７】（Ａ）は地中に設置されるＵ字型熱交換チュー
ブを２組交差配置した場合の断面図であり、（Ｂ）はＵ
字型熱交換チューブを１組配置した場合の断面図であ
る。FIG. 7A is a cross-sectional view when two sets of U-shaped heat exchange tubes installed underground are arranged in an intersecting manner, and FIG.
It is sectional drawing at the time of arrange | positioning one set of U-shaped heat exchange tubes.
【図８】（Ａ）は従来例における中空部を有するスクリ
ューオーガ（ホローステムオーガ）の構造を示した図で
あり、（Ｂ）はその底面図である。FIG. 8A is a view showing a structure of a screw auger (hollow stem auger) having a hollow portion in a conventional example, and FIG. 8B is a bottom view thereof.
【図９】従来例のホローステムオーガ工法における地中
熱利用熱交換チューブの設置手順図である。FIG. 9 is an installation procedure diagram of an underground heat utilization heat exchange tube in a conventional hollow stem auger method.
１ 削孔鋼管 ２ 先端鋼管 ２ａ 短尺鋼管 ２ｂ 底蓋 ２ｃ 嵌合用突起 ２ｅ 接合材 ３ 鋼管本体 ３ａ 連結部 ３ｂ 鍵形切込み ４ 螺旋状羽根 ５ 小径螺旋羽根 ６ 熱交換チューブ ７ 錘 ８ 連結具 ８ａ 雄連結具 ８ｂ 雌連結具 ８ｃ 円錐状部 ８ｄ 係止部 ８ｅ バネ ８ｆ 把持片 ８ｇ 縦軸 ８ｈ 下部縦軸 ９ スイベルジョイント付連結具 ９ａ 雄連結具 ９ｂ 雌連結具 ９ｃ スイベルジョイント １０ スペーサ １１ グラウト材 １２ グラウト管 １３ 地盤 １５ 下部横軸 １６ チューブ受金具 １７ 上部横軸 ３０ スクリューオーガ（ホローステムオーガ） ３０ａ 中空部 ３１ ビット ３２ 仮ケーシング ３３ 錘 ３４ 熱交換チューブ ３５ 螺旋状羽根 ３６ グラウト管 ３７ グラウト材 ３８ 三点杭打機 ３９ クレーン ４０ 地盤 DESCRIPTION OF SYMBOLS 1 Drilled steel pipe 2 Tip steel pipe 2a Short steel pipe 2b Bottom lid 2c Fitting projection 2e Joining material 3 Steel pipe main body 3a Connecting part 3b Keyed cut 4 Spiral blade 5 Small diameter spiral blade 6 Heat exchange tube 7 Weight 8 Connector 8a Male connection Tool 8b Female connector 8c Conical portion 8d Locking portion 8e Spring 8f Gripping piece 8g Vertical axis 8h Lower vertical axis 9 Connector with swivel joint 9a Male connector 9b Female connector 9c Swivel joint 10 Spacer 11 Grout material 12 Grout tube 13 Ground 15 Lower horizontal axis 16 Tube bracket 17 Upper horizontal axis 30 Screw auger (hollow stem auger) 30a Hollow part 31 Bit 32 Temporary casing 33 Weight 34 Heat exchange tube 35 Spiral blade 36 Grout tube 37 Grout material 38 Three-point pile Hammer 39 crane 40 ground
───────────────────────────────────────────────────── フロントページの続き (72)発明者 磯部 悦四郎 東京都千代田区大手町２−６−３ 新日本 製鐵株式会社内 (72)発明者 石橋 洋一 東京都千代田区大手町２−６−３ 新日本 製鐵株式会社内 Ｆターム(参考） 2D029 CA01 CB01 CD03 CD04 KC01 2D051 AH01 GA05 GB03 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Etsushiro Isobe 2-6-3 Otemachi, Chiyoda-ku, Tokyo Inside Nippon Steel Corporation (72) Inventor Yoichi Ishibashi 2-6, Otemachi, Chiyoda-ku, Tokyo 3 Nippon Steel Corporation F term (reference) 2D029 CA01 CB01 CD03 CD04 KC01 2D051 AH01 GA05 GB03
Claims (7)
端部に螺旋状羽根を備え、前記螺旋状羽根の下方または
上方で先端が閉塞された先端鋼管と離脱可能とされた削
孔鋼管と、前記削孔鋼管で削孔された孔内に挿入設置さ
れる熱媒体を流通させる熱交換チューブと、熱交換チュ
ーブの周りの孔内にグラウト材を充填するグラウト管お
よびグラウト材を準備し、先端鋼管を装着した前記削孔
鋼管を地中に回転・圧入して所定の掘削深度まで到達さ
せ、次いで削孔鋼管内に前記熱交換チューブを挿入し、
次に削孔鋼管を逆回転して先端鋼管を切離して削孔鋼管
を引抜き回収しながら同時に熱交換チューブの周りの孔
内にグラウト材を充填して熱交換チューブを設置するこ
とを特徴とする地中熱利用熱交換チューブの設置方法。1. A drilled steel pipe having a spiral blade at one of a distal end thereof and a drilled steel pipe having a distal end closed below or above the spiral blade. And a heat exchange tube for passing a heat medium inserted and installed in the hole drilled by the drilled steel pipe, and a grout tube and a grout material for filling the grout material in the hole around the heat exchange tube. Rotating and press-fitting the drilled steel pipe with the tip steel pipe into the ground to reach a predetermined excavation depth, and then inserting the heat exchange tube into the drilled steel pipe,
Next, the drilled steel pipe is rotated in the reverse direction, the tip steel pipe is cut off, the drilled steel pipe is pulled out and collected, and at the same time, a grout material is filled in the hole around the heat exchange tube and the heat exchange tube is installed. How to install heat exchange tubes using geothermal heat.
し、削孔鋼管を逆回転しながら引抜き回収するようにし
た請求項１記載の地中熱利用熱交換チューブの設置方
法。2. The method according to claim 1, wherein the tip steel pipe is detached below the spiral blade, and the drilled steel pipe is drawn and collected while rotating in the reverse direction.
し、削孔鋼管を非回転で引抜き回収するようにした請求
項１記載の地中熱利用熱交換チューブの設置方法。3. The method according to claim 1, wherein the tip steel pipe is detached above the spiral blade, and the drilled steel pipe is pulled out and collected without rotating.
孔鋼管内に挿入して、グラウト材の充填時に熱交換チュ
ーブが浮上がることを防止した請求項１〜３のいずれか
に記載の地中熱利用熱交換チューブの設置方法。4. The heat exchange tube according to claim 1, wherein a heat exchange tube having a weight attached to its tip is inserted into the drilled steel tube to prevent the heat exchange tube from rising when the grout material is filled. How to install heat exchange tubes using geothermal heat.
に、あらかじめ自動装着可能な連結具を取付けておき、
熱交換チューブを削孔鋼管内に挿入した際自動的に熱交
換チューブ先端が削孔鋼管の先端鋼管に連結されて、グ
ラウト材の充填時に熱交換チューブが浮上がることを防
止した請求項１〜３のいずれかに記載の地中熱利用熱交
換チューブの設置方法。5. A connecting tool that can be automatically mounted in advance on a steel pipe at the end facing the heat exchange tube end,
When the heat exchange tube is inserted into the drilled steel pipe, the heat exchange tube tip is automatically connected to the tip steel pipe of the drilled steel pipe to prevent the heat exchange tube from rising when the grout material is filled. 3. The installation method of the geothermal heat exchange tube according to any one of 3.
錐状連結片の雄連結具とし、他方をバネで付勢された雌
連結具を用い、熱交換チューブの挿入時の押込み力で自
動的に連結具が装着するようにした請求項５記載の地中
熱利用熱交換チューブの設置方法。6. The connector which can be automatically mounted is configured such that one is a male connector of a conical connection piece and the other is a female connector urged by a spring. 6. The installation method of the underground heat utilization heat exchange tube according to claim 5, wherein the connection tool is automatically attached.
グラウト材として、伝熱特性に優れた粉体或いは粒状の
伝熱材と硬化性材料を混合した流動状態の伝熱充填材を
用いたことを特徴とする請求項１〜７のいずれかに記載
の地中熱利用熱交換チューブの設置方法。7. As a grouting material to be filled in a hole around a heat exchange tube, a fluidized heat transfer filler obtained by mixing a powdery or granular heat transfer material having excellent heat transfer characteristics and a curable material is used. The installation method of the underground heat utilization heat exchange tube according to any one of claims 1 to 7, wherein:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001108313A JP2002303088A (en) | 2001-04-06 | 2001-04-06 | Method of installing heat-exchanger tube for utilizing underground heat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001108313A JP2002303088A (en) | 2001-04-06 | 2001-04-06 | Method of installing heat-exchanger tube for utilizing underground heat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002303088A true JP2002303088A (en) | 2002-10-18 |
Family
ID=18960476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001108313A Withdrawn JP2002303088A (en) | 2001-04-06 | 2001-04-06 | Method of installing heat-exchanger tube for utilizing underground heat |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002303088A (en) |
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