JP6418678B2 - Heat collection tube construction method and heat collection tube construction tool - Google Patents

Heat collection tube construction method and heat collection tube construction tool Download PDF

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JP6418678B2
JP6418678B2 JP2014178209A JP2014178209A JP6418678B2 JP 6418678 B2 JP6418678 B2 JP 6418678B2 JP 2014178209 A JP2014178209 A JP 2014178209A JP 2014178209 A JP2014178209 A JP 2014178209A JP 6418678 B2 JP6418678 B2 JP 6418678B2
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weight body
tube
heat collection
pile
weight
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JP2016050754A (en
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新井　清
清 新井
勉 井川
勉 井川
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Nippon Concrete Industries Co Ltd
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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
    • 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)

Description

本発明は、地中熱利用システムに用いる採熱管を杭体内に設置する採熱管施工方法およびこの施工方法の実施に用いる採熱管施工工具に関する。   The present invention relates to a heat collection pipe construction method for installing a heat collection pipe used in a geothermal heat utilization system in a pile body, and a heat collection pipe construction tool used for carrying out this construction method.

地中に中空の既製杭を設置する杭工事において、杭中の土砂を外部へ排出し、杭中に生じた空洞に樹脂製のＵ字状チューブまたは２重管などの採熱管を挿入し、その後、杭中の空洞にセメントミルクや土砂またはベントナイトセメントなどの充填材を充填する採熱管施工方法が知られている（例えば、特許文献１および２参照）。   In pile construction where a hollow ready-made pile is installed in the ground, the earth and sand in the pile is discharged to the outside, and a heat collecting tube such as a resin U-shaped tube or a double tube is inserted into the cavity generated in the pile, Thereafter, a heat collection pipe construction method is known in which a cavity in a pile is filled with a filler such as cement milk, earth and sand, or bentonite cement (for example, see Patent Documents 1 and 2).

さらに、杭工事終了直後に、杭中ソイルセメントを清水に置き換えて、杭中に採熱管を設置する施工方法や、杭工事と同時に鋼管を杭中に設置し、この鋼管中に採熱管を設置する施工方法などもある。   Furthermore, immediately after the completion of the pile construction, the soil cement in the pile is replaced with clean water, and a heat collection pipe is installed in the pile, and a steel pipe is installed in the pile at the same time as the pile construction, and a heat collection pipe is installed in this steel pipe There are construction methods to do.

また、杭工事終了後の杭中ソイルセメントに通水管を挿入して水掘りを実施した後、杭中に採熱管を設置する施工方法もある（例えば、特許文献３参照）。   In addition, there is a construction method in which a heat collecting pipe is installed in a pile after inserting a water pipe into the soil cement in the pile after completion of the pile construction and performing water digging (see, for example, Patent Document 3).

特開２００３−１４８０７９号公報JP 2003-148079 A 特許第３１４３６１９号公報Japanese Patent No. 3143619 特開２０１２−１７２９３７号公報JP 2012-172937 A

上記従来の施工方法のうち、杭中の土砂やソイルセメントを充填材や清水に置き換える施工方法は手間がかかり、コスト的および工期的に問題がある。   Of the conventional construction methods described above, the construction method of replacing soil and soil cement in piles with fillers and fresh water is time-consuming and has problems in terms of cost and construction period.

また、杭工事完了後の杭中ソイルセメントに水掘りを実施する方法は、他の従来工法よりも、コスト的および工期的に優れているが、水掘りを実施する手間がかかるので改良の余地がある。   In addition, the method of water digging the soil cement in the pile after the completion of the pile construction is superior to other conventional methods in terms of cost and construction period, but there is room for improvement because it takes time and effort to carry out the water digging. There is.

本発明は、このような点に鑑みなされたもので、低コストで、かつ短時間のうちに中空の杭体内に採熱管を設置できる採熱管施工方法およびこの施工方法に用いられる採熱管施工工具を提供することを目的とする。   The present invention has been made in view of the above points, and is a heat collection pipe construction method capable of installing a heat collection pipe in a hollow pile body in a short time and at a low cost, and a heat collection pipe construction tool used in this construction method. The purpose is to provide.

請求項１に記載された発明は、地中に中空の杭体を設置する際に流動状態の被充填物が杭体内に充填される杭工事の終了直後に、上記杭体の内径より小径の重錘体とこの重錘体に先端部が取り付けられた採熱管とを上記被充填物中に沈設するに際して、上記重錘体および採熱管に作用する重力よりも被充填物中のこれらに作用する浮力が上回る場合は、上記重錘体および採熱管に作用する重力に、上記重錘体に着脱自在に接続された単管に他の単管を順次結合しながらこれら単管によって構成された長尺押込材により上記重錘体を被充填物中に押し込む押込力を加えて、上記重錘体と採熱管とを上記被充填物中の定着深度まで沈設し、この定着深度まで沈設された上記重錘体から上記長尺押込材を取り外して上記被充填物中から引き抜き、上記被充填物中に上記重錘体およびこの重錘体から地上まで導出された採熱管を残置させる採熱管施工方法である。 請 Motomeko invention described in 1, immediately after the end of the pile construction work with product in a fluid state is filled into the pile body when installing the hollow pile body into the ground, smaller diameter than the inner diameter of the pile body the weight body and the Tonetsu tube tip is attached to the weight body upon which sinking in said with product, these with product in than the gravity acting on the weight body and Tonetsu tube When the acting buoyancy exceeds, the single tube is connected to the gravity tube acting on the weight body and the heat collecting tube while the other single tube is sequentially coupled to the single tube detachably connected to the weight body. Applying a pushing force to push the weight body into the object to be filled with the long pushing material, the weight body and the heat collecting tube are submerged to the fixing depth in the object to be filled, and the body is submerged to the fixing depth. Remove the long push-in material from the weight body and pull it out of the filling material. A Tonetsu tube construction method for leaving the Tonetsu tube derived from the weight body and the weight body in the filling material to the ground.

請求項２に記載された発明は、地中に中空の杭体を設置する際に杭体内に充填される流動状態の被充填物中に採熱管を取り付けた状態で定着深度まで沈設される重錘体と、この重錘体に着脱自在に接続してこの重錘体を上記被充填物中に押し込むために複数の単管を順次結合した長尺押込材とを備え、上記重錘体は、先端を除くほぼ全長にわたって上記採熱管を添わせるように取り付ける軸部と、この軸部の先端から後方に向かって上記採熱管を保護可能な径まで漸次拡径された錐体部と、上記軸部の後端部に設けられた一方の係合部とを備え、上記長尺押込材は、上記重錘体の軸部の後端部に接続される最先端の単管の先端部に設けられて一方向回転で上記一方の係合部に係合するとともに他方向回転でこの係合を解除する他方の係合部を備えた採熱管施工工具である。 According to the second aspect of the present invention, when a hollow pile body is installed in the ground, the weight is set up to a fixing depth in a state where a heat collection tube is attached to a fluid filling material filled in the pile body. A weight body, and a long pushing material that is connected to the weight body in a detachable manner and sequentially couples a plurality of single pipes to push the weight body into the object to be filled. a shaft portion for mounting substantially the entire length except for the tip so Sowaseru the Tonetsu tube, a cone portion which is gradually diverging to protectable diameter above Tonetsu tube toward the distal end of the shaft portion to the rear, the One engagement portion provided at the rear end portion of the shaft portion, and the long pushing member is attached to the distal end portion of the most advanced single tube connected to the rear end portion of the shaft portion of the weight body. The other engaging portion that is provided and engages with the one engaging portion by rotating in one direction and releases the engaging by rotating in the other direction. Is a Tonetsu tube construction tool was painting.

請求項３に記載された発明は、請求項２記載の採熱管施工工具における重錘体が、錐体部の後端周縁部から採熱管の先端部周囲まで、この錐体部が先端から拡径する角度でかつ上記杭体の内径より小径で拡開状に突出された剛性を有する複数のひげ状部材を備えたものである。 According to a third aspect of the present invention, the weight of the heat collecting tube construction tool according to the second aspect is such that the cone portion expands from the tip end periphery of the cone portion to the periphery of the tip end portion of the heat collecting tube. It is provided with a plurality of whisker-like members having an angle to be radiated and having a diameter that is smaller than the inner diameter of the pile body and projecting in an expanded shape.

請求項１記載の発明によれば、重錘体および採熱管に作用する重力よりも被充填物中のこれらに作用する浮力が上回る場合であっても、重錘体に着脱自在に接続された単管に他の単管を順次結合しながらこれら単管によって構成された長尺押込材により重錘体を被充填物中に押し込む押込力を加えることで、重錘体と採熱管とを被充填物中の定着深度まで迅速に沈設でき、さらに、流動状態の被充填物中に長尺押込材を押し込んでからこの長尺押込材を重錘体から取り外して引き抜くのみの１往復工程の作業により、短時間のうちに中空の杭体内に採熱管を設置できる。また、複数の単管を順次結合しながら重錘体と採熱管とを沈設するので、定着深度に係わりなく容易に取り扱うことができる単管により効率良く作業できる。 According to the invention 請 Motomeko 1 wherein, even if the buoyancy acting on these with product in than the gravity acting on the weight body and Tonetsu tube is above, is detachably connected to the weight body By applying a pushing force to push the weight body into the object to be filled with a long pushing material constituted by these single pipes while sequentially connecting other single pipes to the single pipe , the weight body and the heat collecting pipe are connected. It can be quickly laid down to the fixing depth in the filling material, and further, it is a one-reciprocation process in which a long pushing material is pushed into the filling material in a fluid state and then the long pushing material is removed from the weight body and pulled out. By the work, the heat collection tube can be installed in the hollow pile body in a short time. In addition, since the weight body and the heat collecting tube are set while sequentially connecting a plurality of single tubes, the single tube that can be easily handled can be operated efficiently regardless of the fixing depth.

請求項２記載の発明によれば、重錘体の軸部に取り付けられた採熱管を重錘体の錐体部の後方にかばいながら、その錐体部により被充填物中の土塊などを押し分けるようにして採熱管を被充填物中に円滑に挿入でき、作業能率の向上により低コストで、かつ短時間のうちに採熱管を設置できる。また、重錘体の軸部の後端部に設けた一方の係合部に対し、長尺押込材の先端部に設けた他方の係合部を、一方向回転で係合させるとともに他方向回転でこの係合を解除させるので、重錘体および採熱管を被充填物中に沈設する作業と、不要となった長尺押込材を回収する作業との切替を、長尺押込材の回転方向の切替のみにより簡単に行なうことができ、重錘体および採熱管に作用する重力よりも被充填物中のこれらに作用する浮力が上回る場合であっても、上記のように重錘体に着脱自在に接続された長尺押込材による押込力を加えることで、重錘体と採熱管とを被充填物中の定着深度まで迅速に沈設できるので、作業能率の向上により低コストで、かつ短時間のうちに採熱管を設置できる。その際、長尺押込材としての複数の単管を順次結合しながら重錘体と採熱管とを沈設するので、定着深度に係わりなく容易に取り扱うことができる単管により効率良く作業できる。 According to the second aspect of the present invention, the heat collecting tube attached to the shaft portion of the weight body is pushed behind the cone portion of the weight body, and the clot in the filling object is pushed by the cone portion. Thus, the heat collection tube can be smoothly inserted into the object to be filled, and the heat collection tube can be installed in a short time and at a low cost by improving the work efficiency. Further, the other engaging portion provided at the distal end portion of the long push-in member is engaged with one engaging portion provided at the rear end portion of the shaft portion of the weight body by one-way rotation and the other direction. Since this engagement is released by rotation, switching between the work of sinking the weight body and the heat collection tube in the filling material and the work of collecting the long push material that is no longer necessary is performed by rotating the long push material. Even if the buoyancy acting on the filling body exceeds the gravity acting on the weight body and the heat collection tube, the weight body can be By applying an indentation force with a long indenter that is detachably connected, the weight body and the heat collection tube can be quickly laid down to the fixing depth in the filling material, so that the work efficiency is improved and the cost is low. Heat collection tubes can be installed in a short time. At that time, since the weight body and the heat collection tube are set while sequentially connecting a plurality of single tubes as long pushing members, the single tube that can be easily handled can be operated efficiently regardless of the fixing depth.

請求項３記載の発明によれば、重錘体の錐体部の後端周縁部から採熱管の先端部周囲まで、錐体部が先端から拡径する角度でかつ上記杭体の内径より小径で拡開状に剛性を有する複数のひげ状部材を拡開状に突出させたので、これらのひげ状部材により障害物を感知して重錘体を回避させることで重錘体の軸部に取り付けられた採熱管を障害物から保護できる。 According to invention of Claim 3 , it is an angle which a cone part expands from a front-end | tip peripheral part of a cone part of a weight body to the front-end | tip part periphery of a heat collecting pipe, and is smaller than the internal diameter of the said pile body. Since a plurality of whisker-like members having a stiffening shape are projected in a widening shape, the obstacles are detected by these whisker-like members and the weight body is avoided, so that the shaft portion of the weight body can be avoided. The attached heat collection tube can be protected from obstacles.

本発明に係る採熱管施工方法の一実施の形態を示す工程図である。It is process drawing which shows one Embodiment of the heat collecting pipe construction method which concerns on this invention. 同上施工方法に用いられる採熱管施工工具の一実施の形態を示す正面図である。It is a front view which shows one Embodiment of the heat collecting pipe construction tool used for the construction method same as the above. 図２のIII−III線断面図である。It is the III-III sectional view taken on the line of FIG. 同上施工工具の重錘体と長尺押込材の係合部を示す斜視図である。It is a perspective view which shows the engaging part of the weight body and long pushing material of a construction tool same as the above. 同上重錘体の採熱管取付状態を示す正面図である。It is a front view which shows the heat collecting tube attachment state of a weight body same as the above. 同上重錘体の障害物回避作用を示す説明図である。It is explanatory drawing which shows the obstruction avoidance effect | action of a weight body same as the above.

以下、本発明を、図１乃至図６に示された一実施の形態に基いて詳細に説明する。   Hereinafter, the present invention will be described in detail based on one embodiment shown in FIGS.

先ず、図２乃至図６に基づき採熱管施工工具を説明する。   First, the heat collection tube construction tool will be described with reference to FIGS.

図２において11は重錘体であり、この重錘体11は、図６に示されるように既製コンクリート杭などの中空の杭体12内に充填された流動状態の被充填物13中に、先端Ｕ字形の採熱管14を針金15やテープ16などにより取り付けた状態で定着深度まで沈設される。   In FIG. 2, 11 is a weight body, and this weight body 11 is in a fluid-filled article 13 filled in a hollow pile body 12 such as a ready-made concrete pile as shown in FIG. The U-shaped heat collecting tube 14 is attached to the fixing depth with the wire 15 or the tape 16 attached thereto.

被充填物13は、時間経過により流動状態から固化状態に変化する性状のソイルセメントや、固化しないまでも流動状態でなくなる泥土などであり、採熱管14は、例えばポリエチレンなどで成形されたＵ字管に２本の管を溶着したものなどを用いるとよい。   The to-be-filled material 13 is a soil cement that changes from a fluidized state to a solidified state over time, mud soil that does not flow until it solidifies, and the heat collection tube 14 is, for example, U-shaped formed of polyethylene or the like It is good to use what welded two pipes to a pipe.

上記重錘体11は、図５に示されるように先端を除くほぼ全長にわたって上記採熱管14を添わせるように取り付ける軸部21と、この軸部21の先端から後方に向かって上記採熱管14を保護可能な径まで漸次拡径された錐体部22と、図２に示されるように上記軸部21の後端部に設けられた一方の係合部23とを備えている。   As shown in FIG. 5, the weight body 11 includes a shaft portion 21 that is attached so that the heat collecting tube 14 is attached substantially over the entire length excluding the distal end, and the heat collecting tube 14 that extends rearward from the distal end of the shaft portion 21. 2 is provided with a cone portion 22 that is gradually expanded to a diameter that can be protected, and one engaging portion 23 provided at the rear end portion of the shaft portion 21 as shown in FIG.

錐体部22は、上記ソイルセメントや泥土などに混じっている土塊などを押し分けながら採熱管14を杭体12内に沈設するための形状である。   The cone portion 22 has a shape for sinking the heat collecting tube 14 in the pile body 12 while pushing away the earth lump mixed with the soil cement or mud.

一方の係合部23は、軸部21にフランジ溶接された軸部材21aに設けられている。また、採熱管14は、図５に示されるように１本の軸部21に２組設置されている。   One engagement portion 23 is provided on a shaft member 21 a that is flange-welded to the shaft portion 21. Further, as shown in FIG. 5, two sets of heat collecting tubes 14 are installed on one shaft portion 21.

さらに、この重錘体11は、錐体部22の後端周縁部から採熱管14の先端部周囲まで突出させた、剛性を有する複数のひげ状部材24を、図３に示されるように放射状に備えている。これらのひげ状部材24は、図６に示されるように、錐体部22が先端から拡径する角度でかつ杭体12の内径より小径で拡開状に突出されている。 Further, the weight body 11 has a plurality of rigid whisker-like members 24 projecting from the peripheral edge of the rear end of the cone 22 to the periphery of the tip of the heat collecting tube 14, as shown in FIG. In preparation. As shown in FIG. 6, these whisker-like members 24 project in an expanded shape with an angle at which the cone portion 22 expands from the tip and a diameter smaller than the inner diameter of the pile body 12 .

重錘体11および採熱管14に作用する重力よりも被充填物13中のこれらに作用する浮力が上回る場合は、図２に示されるように上記重錘体11に長尺押込材27が着脱自在に接続される。この長尺押込材27は、重錘体11を上記被充填物13中に押し込むものであり、重錘体11の軸部21の後端部すなわち軸部材21aに接続される最先端の単管27aと、この単管27aに複数の単管結合ジョイント28により順次結合される複数の単管27bとを備えている。   When the buoyancy acting on the filling body 13 exceeds the weight 11 acting on the weight body 11 and the heat collecting tube 14, the long pushing member 27 is attached to and detached from the weight body 11 as shown in FIG. Connect freely. This long pushing member 27 pushes the weight body 11 into the object to be filled 13, and is the most advanced single tube connected to the rear end portion of the shaft portion 21 of the weight body 11, that is, the shaft member 21a. 27a and a plurality of single tubes 27b that are sequentially coupled to the single tube 27a by a plurality of single tube coupling joints 28.

上記長尺押込材27は、最先端の単管27aの先端部に設けられて上記一方の係合部23と係脱自在の他方の係合部29を備えている。   The long push-in member 27 is provided at the distal end portion of the state-of-the-art single tube 27a and includes the one engagement portion 23 and the other engagement portion 29 that can be freely engaged and disengaged.

図４に示されるように、上記一方の係合部23は、上記軸部21の後端部の軸部材21aに１対の軸方向溝23aおよび周方向溝23bがＬ状に切込形成されたものである。   As shown in FIG. 4, the one engaging portion 23 has a pair of axial grooves 23a and a circumferential groove 23b cut into an L shape in the shaft member 21a at the rear end of the shaft portion 21. It is a thing.

上記他方の係合部29は、上記軸部材21aに接続される最先端の単管27aの先端部において径方向に挿着されたピンであり、この単管27aの一方向回転(図４矢印方向回転)で上記一方の係合部23と係合するとともに他方向回転でこの係合を解除する。   The other engaging portion 29 is a pin inserted in the radial direction at the tip of the most advanced single tube 27a connected to the shaft member 21a, and is rotated in one direction (see the arrow in FIG. 4). The one engagement portion 23 is engaged in the direction rotation) and the engagement is released in the other direction rotation.

次に、図２などに示された上記採熱管施工工具を用いて行なう採熱管施工方法を、図１に基づき説明する。   Next, a heat collecting pipe construction method performed using the above heat collecting pipe construction tool shown in FIG. 2 and the like will be described with reference to FIG.

杭工事としてプレボーリング工法を用いる場合は、杭外周と杭穴との隙間を充填固定するためと、杭先端に根固め部を形成するために、オーガにより所定の深さまで掘削し、その後セメントミルクを注入しながら杭穴を反復掘削するので、セメントミルクと掘削土とが混ざった被充填物13としてのソイルセメントが杭穴内に比較的長く充填され、その中に中空杭を沈設するため、杭体12内に下方から充填されるソイルセメントも比較的長くなる。   When the pre-boring method is used for the pile construction, excavation to a predetermined depth by an auger to fill and fix the gap between the pile outer periphery and the pile hole and to form a solidified part at the tip of the pile, then cement milk Since the pile hole is repeatedly excavated while injecting the soil, the soil cement as the filling material 13 mixed with cement milk and excavated soil is filled in the pile hole for a relatively long time, and the hollow pile is set in the pile hole. The soil cement filled from below into the body 12 is also relatively long.

杭工事として中堀工法を用いる場合は、同様にセメントミルクを注入しながら杭穴を掘削するが、掘削をしながら杭を沈設する工法のため、セメントミルクを注入しながら掘削する掘削長は比較的短く、杭体12内に下方から充填される被充填物13としてのソイルセメントも比較的短くなり、このソイルセメントの上方で杭体12内に、掘削土と水とが混ざった被充填物13としての泥土が比較的長く充填される。   When the Nakabori method is used for pile construction, the pile hole is similarly excavated while injecting cement milk. However, the excavation length of excavating while injecting cement milk is relatively high because of the method of sinking the pile while excavating. The soil cement as the filling material 13 that is short and is filled from below into the pile body 12 is also relatively short, and the filling material 13 in which excavated soil and water are mixed in the pile body 12 above the soil cement. The mud is filled for a relatively long time.

このように、プレボーリング工法、中掘工法などの杭工事により地中に既製コンクリート杭などの中空の杭体12を設置する際に、ソイルセメントや泥土などの被充填物13が杭体12内に下方から充填される。   In this way, when a hollow pile body 12 such as a ready-made concrete pile is installed in the ground by a pile work such as a pre-boring method or an excavation method, the filling material 13 such as soil cement or mud soil is placed inside the pile body 12. From below.

これらの被充填物13は、いずれにしても時間経過により流動状態でなくなり、採熱管14の沈設が困難となるため、上記のような杭工事の終了直後に、以下に説明するように速やかに採熱管施工方法を実施する。   In any case, these filling materials 13 will not be in a fluid state over time, and it will be difficult to set up the heat collection tube 14, so immediately after the completion of the pile construction as described above, as described below, Implement heat pipe construction method.

先ず、図１（ａ）に示されるように、杭体12上の地面に足場板31を設置し、この足場板31から杭体12の杭頭まで、杭中心部に案内管としてのボイド管32を挿入する。   First, as shown in FIG. 1 (a), a scaffolding plate 31 is installed on the ground on the pile body 12, and from this scaffolding plate 31 to the pile head of the pile body 12, a void tube as a guide tube is provided at the center of the pile. Insert 32.

図１（ｂ）に示されるように、上記被充填物13が流動状態であるうちに、クレーン33で杭体12の内径より小径の重錘体11と、この重錘体11に先端部が取り付けられた採熱管14とを吊り上げ、重錘体11および採熱管14の先端部をボイド管32の中心に挿入し、クレーン33で徐々に下ろしながら重錘体11および採熱管14を杭体12内に挿入する。   As shown in FIG. 1 (b), while the filling 13 is in a fluid state, the crane 33 has a weight body 11 having a diameter smaller than the inner diameter of the pile body 12, and the weight body 11 has a tip portion. The attached heat collecting tube 14 is lifted, the weight 11 and the tip of the heat collecting tube 14 are inserted into the center of the void tube 32, and the weight 11 and the heat collecting tube 14 are piled down while being gradually lowered by the crane 33. Insert inside.

採熱管14の内部には、あらかじめ水を充填しておき、この水の重力により採熱管14に作用する実質的な浮力を減少させるようにする。   The inside of the heat collecting tube 14 is filled with water in advance, and the substantial buoyancy acting on the heat collecting tube 14 due to the gravity of the water is reduced.

図１（ｃ）に示されるように、重錘体11および採熱管14を杭体12内の被充填物13中に挿入するにつれて採熱管14に作用する浮力も徐々に増加するが、重錘体11および採熱管14に作用する最大浮力よりも重錘体11および採熱管14に作用する重力が上回る場合は、クレーン33の重錘体吊下用ワイヤおよび採熱管吊下用ワイヤを繰り出して重錘体11と採熱管14を下ろすことで、これらの重錘体11および採熱管14をこれらに作用する重力によって被充填物13中の定着深度まで沈設する。   As shown in FIG. 1 (c), the buoyancy acting on the heat collecting tube 14 gradually increases as the weight body 11 and the heat collecting tube 14 are inserted into the filling material 13 in the pile body 12. If the gravity acting on the weight body 11 and the heat collection tube 14 exceeds the maximum buoyancy acting on the body 11 and the heat collection tube 14, the weight body suspension wire and the heat collection tube suspension wire of the crane 33 are fed out. By dropping the weight body 11 and the heat collecting tube 14, the weight body 11 and the heat collecting tube 14 are laid down to the fixing depth in the filling material 13 by gravity acting on them.

その際、重錘体11の軸部21に取り付けられた採熱管14を重錘体11の錐体部22の後方にかばいながら、その錐体部22により被充填物13中の土塊などを押し分けるようにして採熱管14を被充填物13中に挿入する。そして、重錘体11および採熱管14の定着深度でのレベル止めを確認したら、上記ワイヤの繰出を停止して、その定着深度に重錘体11および採熱管14を繋留する。   At that time, while covering the heat collecting tube 14 attached to the shaft portion 21 of the weight body 11 to the rear of the cone portion 22 of the weight body 11, the cone portion 22 pushes the soil mass in the filling 13. The heat collecting tube 14 is inserted into the filling material 13 in a divided manner. When the level stop at the fixing depth of the weight body 11 and the heat collecting tube 14 is confirmed, the feeding of the wire is stopped, and the weight body 11 and the heat collecting tube 14 are tethered to the fixing depth.

また、重錘体11と採熱管14を被充填物13中に沈設するに際して、重錘体11および採熱管14に作用する重力よりも被充填物13中のこれらに作用する浮力が上回るような場合は、予め重錘体11に長尺押込材27の単管27aを係合部23，29により着脱自在に接続しておき、重錘体11および採熱管14に作用する重力だけでなく、長尺押込材27により作業者34の人力で重錘体11を被充填物13中に押し込む押込力を加えて、重錘体11と採熱管14とを被充填物13中の定着深度まで迅速に沈設し、重錘体11および採熱管14の定着深度でのレベル止めを確認したら、長尺押込材27を固定する。   Further, when the weight body 11 and the heat collecting tube 14 are set in the filling object 13, the buoyancy acting on these in the filling object 13 exceeds the gravity acting on the weight body 11 and the heat collecting pipe 14. In this case, the single tube 27a of the long push member 27 is connected to the weight body 11 in a detachable manner by the engaging portions 23 and 29, and not only the gravity acting on the weight body 11 and the heat collecting tube 14, By applying the pushing force to push the weight body 11 into the filling object 13 by the manual force of the operator 34 by the long pushing material 27, the weight body 11 and the heat collecting tube 14 are quickly brought to the fixing depth in the filling object 13. When the level stop at the fixing depth of the weight body 11 and the heat collecting tube 14 is confirmed, the long pushing member 27 is fixed.

このように長尺押込材27を用いる場合は、重錘体11と採熱管14の挿入深度に応じて上記重錘体11に長尺押込材27としての複数の単管27a，27bをジョイント28により順次結合しながら、これらの単管27a，27bを被充填物13中に押し込むようにする。   Thus, when using the long pushing material 27, according to the insertion depth of the weight body 11 and the heat collection pipe | tube 14, the single tube 27a, 27b as the long pushing material 27 is joined to the said weight body 11 by the joint 28. These single pipes 27a and 27b are pushed into the filling material 13 while being sequentially joined together.

この重錘体11および採熱管14を被充填物13中に沈設する作業では、係合部23，29での係合状態を維持するために、長尺押込材27を図４に矢印で示された一方向に回転させながら被充填物13中に押し込むようにする。   In the operation of sinking the weight body 11 and the heat collecting tube 14 in the filling object 13, in order to maintain the engaged state at the engaging portions 23 and 29, the long pushing member 27 is indicated by an arrow in FIG. It is pushed into the filling material 13 while rotating in one direction.

重錘体11と採熱管14が被充填物13中の定着深度で安定したら、被充填物13が固化する前に、図４に矢印で示された係合時とは逆方向に長尺押込材27を操作し、矢印とは反対方向にひねる操作のみで、重錘体11の軸部21の係合部23に対する長尺押込材27の最先端の係合部29の結合状態を簡単に切り離すことができるので、採熱管14が上昇しないことを確認しながら、図１（ｄ）に示されるように上記長尺押込材27のみをクレーン33により吊り上げ、被充填物13中から引き抜く。このとき、長尺押込材27の各単管27b，27aを順次取り外しながら回収する。   When the weight body 11 and the heat collection tube 14 are stabilized at the fixing depth in the filling object 13, before the filling object 13 is solidified, it is pushed in the long direction in the opposite direction to the engagement shown by the arrow in FIG. By simply operating the material 27 and twisting it in the direction opposite to the arrow, it is possible to easily connect the most advanced engagement portion 29 of the long push-in material 27 to the engagement portion 23 of the shaft portion 21 of the weight body 11 Since it can be cut off, while confirming that the heat collecting tube 14 does not rise, only the long pushing member 27 is lifted by the crane 33 as shown in FIG. At this time, the single tubes 27b and 27a of the long push-in member 27 are collected while being sequentially removed.

図１（ｅ）に示されるように上記杭体12内で被充填物13中に、上記重錘体11およびこの重錘体11から地上まで導出された採熱管14を残置させ、被充填物13を熱伝導体として地中からの採熱および地中への放熱を行なうようにする。なお、この採熱管施工直後は、地上まで導出された採熱管14の周囲に目印体35を設置しておく。   As shown in FIG. 1 (e), the weight body 11 and the heat collecting pipe 14 led out from the weight body 11 to the ground are left in the filling body 13 in the pile body 12, and the filling body 13 is used as a heat conductor to collect heat from the ground and to release heat to the ground. Immediately after the construction of the heat collecting tube, the mark body 35 is installed around the heat collecting tube 14 led out to the ground.

次に、図１乃至図６に示された実施の形態の効果を説明する。   Next, effects of the embodiment shown in FIGS. 1 to 6 will be described.

杭工事の終了直後は流動状態であるソイルセメントや泥土などの被充填物13の性状に着眼し、杭体12内の被充填物13が流動状態であるうちに、重錘体11および採熱管14に作用する重力によって、被充填物13中のこれらに作用する浮力に抗して重錘体11および採熱管14を沈めることで、杭打機を用いることなく重錘体11および採熱管14を被充填物13中の定着深度まで沈設でき、これにより、杭打工事歩掛りの低下につながる杭打機の利用を回避できるので、低コストで、かつ短時間のうちに中空の杭体12内に採熱管14を設置できる。   Immediately after the completion of the pile work, pay attention to the properties of the filling material 13 such as soil cement and mud that are in a fluid state, and while the filling material 13 in the pile body 12 is in a fluid state, the weight body 11 and the heat collection tube The weight body 11 and the heat collection tube 14 are used without using a pile driver by sinking the weight body 11 and the heat collection pipe 14 against the buoyancy acting on them in the filling material 13 due to the gravity acting on the load 14. Can be sunk to the anchorage depth in the filling material 13, thereby avoiding the use of a pile driving machine that leads to a decrease in the pile driving work yield. The heat collecting tube 14 can be installed in the.

また、重錘体11の軸部21に取り付けられた採熱管14を重錘体11の錐体部22の後方にかばいながら、その錐体部22により被充填物13中の土塊を押し分けるようにして採熱管14を被充填物13中に円滑に挿入でき、作業能率の向上により低コストで、かつ短時間のうちに採熱管14を設置できる。   Further, while covering the heat collecting tube 14 attached to the shaft portion 21 of the weight body 11 to the rear of the cone portion 22 of the weight body 11, the cone portion 22 pushes the soil mass in the filling material 13 separately. Thus, the heat collecting tube 14 can be smoothly inserted into the filling material 13, and the heat collecting tube 14 can be installed in a short time and at a low cost by improving the work efficiency.

さらに、重錘体11の錐体部22の後端周縁部から採熱管14の先端部周囲まで、錐体部22が先端から拡径する角度で、剛性を有する複数のひげ状部材24を拡開状に突出させたので、図６に示されるように、これらのひげ状部材24により障害物36を感知して重錘体11を回避させることで重錘体11の軸部21に取り付けられた採熱管14を障害物36から保護できる。   Further, a plurality of rigid whisker-like members 24 are expanded from the rear peripheral edge of the cone portion 22 of the weight 11 to the periphery of the tip portion of the heat collecting tube 14 at an angle at which the cone portion 22 expands from the tip. As shown in FIG. 6, it is attached to the shaft portion 21 of the weight body 11 by detecting the obstacle 36 with these whiskers 24 and avoiding the weight body 11, as shown in FIG. The heat collecting tube 14 can be protected from the obstacle 36.

また、重錘体11および採熱管14に作用する重力よりも被充填物13中のこれらに作用する浮力が上回る場合であっても、重錘体11に着脱自在に接続された長尺押込材27により重錘体11を被充填物13中に押し込む押込力を加えることで、重錘体11と採熱管14とを被充填物13中の定着深度まで迅速に沈設できるので、作業能率の向上により低コストで、かつ短時間のうちに採熱管14を設置できる。   In addition, even when the buoyancy acting on the filling body 13 exceeds the gravity acting on the weight body 11 and the heat collecting tube 14, the long pushing material connected to the weight body 11 detachably. By applying a pushing force to push the weight body 11 into the filling material 13 by 27, the weight body 11 and the heat collecting tube 14 can be quickly laid down to the fixing depth in the filling material 13, improving work efficiency. Therefore, the heat collecting tube 14 can be installed at a low cost and in a short time.

このとき、流動状態の被充填物13中に長尺押込材27を押し込んでからこの長尺押込材27を重錘体11から取り外して引き抜くのみの１往復工程の作業により、短時間のうちに中空の杭体12内に採熱管14を設置できる。   At this time, in a short time, a single reciprocation process is performed in which the long pushing member 27 is pushed into the fluidized material 13 and then the long pushing member 27 is removed from the weight body 11 and pulled out. A heat collecting tube 14 can be installed in the hollow pile body 12.

特に、重錘体11の軸部21の後端部に設けた一方の係合部23に対し、長尺押込材27の先端部に設けた他方の係合部29を、一方向回転で係合させるとともに他方向回転でこの係合を解除させるので、重錘体11および採熱管14を被充填物13中に沈設する作業と、不要となった長尺押込材27を回収する作業との切替を、長尺押込材27の回転方向の切替のみにより簡単に行なうことができる。   In particular, the other engagement portion 29 provided at the distal end portion of the long push-in member 27 is engaged with one engagement portion 23 provided at the rear end portion of the shaft portion 21 of the weight body 11 by one-way rotation. Since this engagement is released by rotating in the other direction, the work of sinking the weight body 11 and the heat collection tube 14 in the filling material 13 and the work of collecting the long pushing material 27 that has become unnecessary Switching can be easily performed only by switching the rotation direction of the long pushing member 27.

また、長尺押込材27としての複数の単管27a，27bを順次結合しながら重錘体11と採熱管14とを沈設するので、定着深度に係わりなく容易に取り扱うことができる単管27a，27bにより効率良く作業できる。   In addition, since the weight body 11 and the heat collecting tube 14 are sunk while sequentially connecting a plurality of single tubes 27a and 27b as the long pushing member 27, the single tube 27a that can be easily handled regardless of the fixing depth, It can work efficiently by 27b.

本発明は、採熱管施工方法を実施する施工業者や、その施工工具を製造、販売などする事業者にとって利用可能性がある。   The present invention has applicability to a contractor who implements a heat sampling tube construction method and a business operator who manufactures and sells the construction tool.

11 重錘体
12 杭体
13 被充填物
14 採熱管
21 軸部
22 錐体部
23 一方の係合部
24 ひげ状部材
27 長尺押込材
27a 単管
27b 単管
29 他方の係合部 11 Weight body
12 piles
13 Filled material
14 Heat collection tube
21 Shaft
22 Cone
23 One engaging part
24 Whiskers
27 Long indentation material
27a Single pipe
27b Single pipe
29 The other engaging part

Claims (3)

地中に中空の杭体を設置する際に流動状態の被充填物が杭体内に充填される杭工事の終了直後に、上記杭体の内径より小径の重錘体とこの重錘体に先端部が取り付けられた採熱管とを上記被充填物中に沈設するに際して、上記重錘体および採熱管に作用する重力よりも被充填物中のこれらに作用する浮力が上回る場合は、上記重錘体および採熱管に作用する重力に、上記重錘体に着脱自在に接続された単管に他の単管を順次結合しながらこれら単管によって構成された長尺押込材により上記重錘体を被充填物中に押し込む押込力を加えて、上記重錘体と採熱管とを上記被充填物中の定着深度まで沈設し、
この定着深度まで沈設された上記重錘体から上記長尺押込材を取り外して上記被充填物中から引き抜き、
上記被充填物中に上記重錘体およびこの重錘体から地上まで導出された採熱管を残置させる
ことを特徴とする採熱管施工方法。 Immediately after the completion of the pile work in which the piled body is filled with fluid filling material when a hollow pile body is installed in the ground, a weight body having a diameter smaller than the inside diameter of the pile body and a tip of the weight body If the buoyancy acting on the weight in the filled material exceeds the weight acting on the weight body and the heat collecting tube when the heat collecting tube to which the section is attached is set in the filled material, the weight The gravity body acting on the body and the heat collection tube is connected to the single pipe detachably connected to the weight body while the other single pipe is sequentially coupled to the weight body by the long pushing member constituted by these single pipes. Applying a pushing force to be pushed into the filling material, sinking the weight body and the heat collecting tube to the fixing depth in the filling material,
Remove the long pushing material from the weight body set to the fixing depth and pull it out from the filling material,
A heat collection pipe construction method, wherein the weight body and the heat collection pipe led out from the weight body to the ground are left in the object to be filled. 地中に中空の杭体を設置する際に杭体内に充填される流動状態の被充填物中に採熱管を取り付けた状態で定着深度まで沈設される重錘体と、
この重錘体に着脱自在に接続してこの重錘体を上記被充填物中に押し込むために複数の単管を順次結合した長尺押込材とを備え、
上記重錘体は、
先端を除くほぼ全長にわたって上記採熱管を添わせるように取り付ける軸部と、
この軸部の先端から後方に向かって上記採熱管を保護可能な径まで漸次拡径された錐体部と、
上記軸部の後端部に設けられた一方の係合部とを備え、
上記長尺押込材は、上記重錘体の軸部の後端部に接続される最先端の単管の先端部に設けられて一方向回転で上記一方の係合部に係合するとともに他方向回転でこの係合を解除する他方の係合部を備えた
ことを特徴とする採熱管施工工具。 A weight body that is submerged to the fixing depth in a state where a heat collection tube is attached to a filling material in a fluid state that is filled in the pile body when a hollow pile body is installed in the ground ,
A long pushing material in which a plurality of single pipes are sequentially coupled to detachably connect to the weight body and push the weight body into the object to be filled.
The weight body is
A shaft portion that is attached so that the heat collection tube follows the entire length excluding the tip,
A cone portion which is gradually diverging to protectable diameter above Tonetsu tube rearward from the distal end of the shaft portion,
One engaging portion provided at the rear end portion of the shaft portion,
The long push-in member is provided at the distal end of a state-of-the-art single pipe connected to the rear end of the shaft portion of the weight body, and engages with the one engagement portion in one direction rotation and the other. The other engagement part which releases this engagement by direction rotation was provided.
A heat collection tube construction tool characterized by that. 重錘体は、
錐体部の後端周縁部から採熱管の先端部周囲まで、この錐体部が先端から拡径する角度でかつ上記杭体の内径より小径で拡開状に突出された剛性を有する複数のひげ状部材を備えた
ことを特徴とする請求項２記載の採熱管施工工具。 The weight body is
From the rear end peripheral part of the cone part to the periphery of the tip part of the heat collection tube, the cone part has an angle at which the diameter is expanded from the tip and has a plurality of rigidity protruding in an expanded shape with a smaller diameter than the inner diameter of the pile body . The heat collecting pipe construction tool according to claim 2 , further comprising a whisker-like member.
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