JP2904065B2 - Electric heater device for frozen soil thawing - Google Patents
Electric heater device for frozen soil thawingInfo
- Publication number
- JP2904065B2 JP2904065B2 JP20803695A JP20803695A JP2904065B2 JP 2904065 B2 JP2904065 B2 JP 2904065B2 JP 20803695 A JP20803695 A JP 20803695A JP 20803695 A JP20803695 A JP 20803695A JP 2904065 B2 JP2904065 B2 JP 2904065B2
- Authority
- JP
- Japan
- Prior art keywords
- thawing
- electric heater
- heat medium
- hot water
- tube
- 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.)
- Expired - Fee Related
Links
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】土木分野の凍結工法により形
成された凍土を解凍するための電熱器装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric heater for thawing frozen soil formed by a freezing method in the field of civil engineering.
【０００２】[0002]
【従来技術及び発明が解決しようとする課題】土木の分
野にあって、特にシールド工法の発進、到達、地中接合
等が軟弱地盤に応用される場合、屡々用いられる凍結工
法に於いて、凍土を解凍するための電熱器装置である。2. Description of the Related Art In the field of civil engineering, especially when the starting, reaching, underground joining, etc. of a shield method are applied to soft ground, the freezing method is often used in a freezing method. It is an electric heater device for defrosting.
【０００３】図５は従来から用いられた一般的な凍土解
凍法を示す図である。FIG. 5 is a view showing a conventional frozen soil thawing method used conventionally.
【０００４】凍土中に予め解凍管１をボーリングして埋
設しておく。次に解凍管１内に温水循環用の内管２を挿
入し、解凍管１の循環用のの内管２は複数本ヘッダ８で
纏められる。ヘッダ８には給湯管１０が配管され、給湯
ポンプ１３を経て温水タンク７に接続される。温水タン
ク７には投げ込み電熱器１２が投入され温水タンクの水
を加熱する。A thawing tube 1 is previously drilled and buried in frozen soil. Next, the inner pipe 2 for circulating hot water is inserted into the thawing pipe 1, and the inner pipe 2 for circulating the thawing pipe 1 is put together by a plurality of headers 8. A hot water supply pipe 10 is connected to the header 8 and is connected to the hot water tank 7 via a hot water supply pump 13. The hot water tank 7 is supplied with a throw-in electric heater 12 to heat the water in the hot water tank.
【０００５】一方、解凍管１には、給湯ポンプ１３、給
湯管１０、循環用の内管２を経由して流れ込んだ熱湯を
排出する排水管が各解凍管１からヘッダ９に集められ、
循環管１１を経て温水タンク７に戻るようになってい
る。On the other hand, in the thawing pipes 1, drain pipes for discharging the hot water flowing through the hot water supply pump 13, the hot water supply pipe 10, and the inner pipe 2 for circulation are collected from each thawing pipe 1 into the header 9,
It returns to the hot water tank 7 via the circulation pipe 11.
【０００６】このようにして、解凍管の周囲から熱を放
散し凍土の解凍がおこなわれる。[0006] In this manner, heat is dissipated from the periphery of the thawing tube to thaw frozen ground.
【０００７】このような従来の方法では、次のような問
題点があった。[0007] Such a conventional method has the following problems.
【０００８】（イ）一般的にシールドトンネル内は空間
的制限があり温水タンクを解凍管の近傍に設置すること
が困難である。(A) Generally, there is a space limitation in a shield tunnel, and it is difficult to install a hot water tank near a thawing pipe.
【０００９】（ロ）従って、給湯管、循環管の配管が長
くなり、設備コストが高い。(B) Accordingly, the lengths of the hot water supply pipe and the circulation pipe become long, and the equipment cost is high.
【００１０】（ハ）また給湯管が長いことにより、途中
で熱放散がおこり熱効率がよくない。(C) In addition, since the length of the hot water supply pipe is long, heat is dissipated on the way and heat efficiency is not good.
【００１１】（ニ）またトンネルという狭い空間で裸管
で給湯することになれば、人体と給湯管が接触したりし
て危険であり、水温をあまり高くすることはできない。(4) If hot water is supplied by a bare pipe in a narrow space such as a tunnel, the human body may come into contact with the hot water supply pipe, which is dangerous.
【００１２】（ホ）システムが故障すると、複数本ある
解凍管が一斉に働かなくなる。(E) When the system breaks down, the plurality of thawing tubes do not work simultaneously.
【００１３】本発明は以上のような問題点を解決するこ
とを課題としてなされたものである。The present invention has been made to solve the above problems.
【００１４】[0014]
【課題を解決するための手段】本発明は解凍管毎に、液
体の熱媒体を充満し、該解凍管内部を液体の熱媒体が循
環し易いように、通路を分離する循環用の内管を設け、
電動機もしくは原動機等回転駆動できるものでポンプを
駆動し、強制的に熱媒体を循環させ、熱媒体の温度上昇
のため、電熱器を投入して凍土解凍用電熱器装置を形成
する。従って課題とする問題点は次のように解決され
る。SUMMARY OF THE INVENTION According to the present invention, a circulating inner tube is filled with a liquid heating medium for each thawing tube and a passage is separated so that the liquid heating medium can easily circulate inside the thawing tube. Is established,
The pump is driven by a motor or a motor such as a motor that can be driven to rotate, and the heat medium is forcibly circulated. In order to raise the temperature of the heat medium, an electric heater is turned on to form an electric heater device for frozen ground thawing. Therefore, the problem to be solved is solved as follows.
【００１５】（イ）各解凍管毎に、独立した装置である
から、温水タンクを設備する必要はなく、設置空間を必
要としない。(A) Since each thawing tube is an independent device, there is no need to provide a hot water tank and no installation space is required.
【００１６】（ロ）各解凍管毎に独立した装置なので、
給湯管は不要となり設備コストは下がる。(B) Since each thawing tube is an independent device,
Hot water pipes are not required, and equipment costs are reduced.
【００１７】（ハ）給湯管がないため、不要な熱放散が
なく熱効率は高い。(C) Since there is no hot water supply pipe, there is no unnecessary heat dissipation and the heat efficiency is high.
【００１８】（ニ）高温配管が露出することもなく安全
性が確保できるばかりか、従来よりも温度を上げて解凍
効率をよくすることができる。因みに、熱媒体が水だと
１００°Ｃ以上にはならないが、高沸点の熱媒体を使用
して、高温稼働ができる。(D) Safety can be ensured without exposing the high-temperature pipe, and the thawing efficiency can be improved by increasing the temperature as compared with the conventional case. Incidentally, if the heat medium is water, the temperature does not reach 100 ° C. or higher, but high-temperature operation can be performed using a heat medium having a high boiling point.
【００１９】（ホ）各解凍管独立なので、複数本の解凍
管が一斉に作動しなくなるということはない。(E) Since each thawing tube is independent, there is no possibility that a plurality of thawing tubes stop operating at the same time.
【００２０】[0020]
【発明の実施の形態】以下図面によって、本発明の詳細
を説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to the drawings.
【００２１】図１は本発明の一実施例を示す図である。FIG. 1 is a diagram showing an embodiment of the present invention.
【００２２】解凍管１に液体の熱媒体を充満し、電熱器
３を投入して熱媒体を加熱する。解凍管１の内部の温度
が均一になるように、熱媒体循環用の内管２を設け、底
部と側面に適宜孔を穿孔しておく。該熱媒体循環用の内
管２の内部には、熱媒体を強制循環させるために、ポン
プ４が電動機もしくは原動機等回転駆動できるもの５で
駆動されるように設置されている。電熱器３で加熱され
た液体熱媒体は、該ポンプ４で循環用の内管２の底部及
び側面の孔を通って強制循環される。このようにして、
常に均一温度に保たれた解凍管１の側面及び底面から熱
が放散されて解凍が行われる。The thawing tube 1 is filled with a liquid heat medium, and the electric heater 3 is charged to heat the heat medium. An inner tube 2 for circulating the heat medium is provided so that the temperature inside the thawing tube 1 becomes uniform, and holes are formed in the bottom and side surfaces as appropriate. In order to forcibly circulate the heat medium, a pump 4 is installed inside the inner pipe 2 for circulating the heat medium by a pump 5 such as an electric motor or a motor which can be driven to rotate. The liquid heat medium heated by the electric heater 3 is forcibly circulated by the pump 4 through holes at the bottom and side surfaces of the inner pipe 2 for circulation. In this way,
The heat is dissipated from the side and bottom surfaces of the thawing tube 1 always kept at a uniform temperature, and thawing is performed.
【００２３】なお熱媒体の循環方向は上下いずれでもよ
く、ポンプ４はインペラ型でなくても、スクリュウ型で
もその他液体を移動させる機構であればよい。The direction of circulation of the heat medium may be either up or down, and the pump 4 is not limited to an impeller type, but may be a screw type or any other mechanism for moving liquid.
【００２４】電動機もしくは原動機等回転駆動できるも
のは、防水型、水中型であれば、装置は一層コンパクト
になるが、動力の伝達法としては、ピニオン・ギヤでも
よくチェン・スプロケットあるいはＶベルト駆動でもよ
い。If a motor or a motor such as a prime mover that can be rotated is a waterproof type or a submersible type, the device becomes more compact, but the power transmission method is a pinion gear, a chain sprocket or a V-belt drive. Good.
【００２５】電熱器の形状も、Ｕ字型に限らずコイル状
であってもよいし、棒状であってもよく、特にその形は
問わない。The shape of the electric heater is not limited to the U-shape but may be a coil shape or a rod shape, and the shape is not particularly limited.
【００２６】また液体熱媒体は普通一般に水を用いる
が、とくに水を用いる必要はなく、高沸点物質で作動温
度を上げるもよく、解凍初期のことを考慮して不凍液を
用いてもよい。Although water is generally used as the liquid heat medium, it is not necessary to use water in particular, and the operating temperature may be increased by using a high boiling substance, or an antifreeze may be used in consideration of the initial stage of thawing.
【００２７】図２はスクリュウポンプの図であり、図３
（ａ）はコイル状電熱器、（ｂ）は棒状電熱器の図であ
る。FIG. 2 is a view of a screw pump, and FIG.
(A) is a figure of a coil-shaped electric heater, (b) is a figure of a rod-shaped electric heater.
【００２８】図４は、別の解凍電熱器装置の例で、中央
に循環用の内管２を設け、その外周にスクリュウ２ａを
取着し、ピニオン・ギヤで、該スクリュウ付循環用内管
を回転駆動し液体の熱媒体を強制循環してなる装置の図
である。電熱器には棒状のものを用いた。FIG. 4 shows another example of the thawing electric heater device, in which a circulation inner pipe 2 is provided at the center, a screw 2a is mounted on the outer periphery thereof, and the screw-circulating inner pipe 2 is attached by a pinion gear. FIG. 2 is a diagram of an apparatus in which a liquid heat medium is forcibly circulated by forcibly driving the liquid heat medium. A rod-shaped heater was used.
【００２９】また図示はしないが、中央に設けた循環用
内管の内側にスクリュウを取付たものでもよい。Although not shown, a screw may be attached inside a circulation inner pipe provided at the center.
【００３０】[0030]
【発明の効果】この発明の効果は、電熱器とポンプを一
体化したユニットとして各解凍管毎に独立して用いるた
め次のような効果がある。The effects of the present invention have the following effects because they are used independently for each thawing tube as a unit integrating the electric heater and the pump.
【００３１】（イ）温水タンクが不必要であり、従来必
要とした温水タンクのための空間を必要としない。(A) A hot water tank is unnecessary, and a space for a hot water tank which has been required conventionally is not required.
【００３２】（ロ）配管がないため、人体が高温と接触
することがなくなり、安全性が確保でき、しかも設備コ
ストは下がる。(B) Since there is no pipe, the human body does not come into contact with high temperatures, safety can be ensured, and equipment costs are reduced.
【００３３】（ハ）高温で作動させることができ、無駄
な熱放散がなく熱効率がよい。(C) It can be operated at a high temperature, and there is no wasteful heat dissipation, and the heat efficiency is good.
【００３４】（ニ）システムの故障で、一斉に複数の解
凍管の機能が停止することはない。(D) The functions of a plurality of thawing tubes are not stopped at the same time due to a system failure.
【図１】本発明の一実施例を示す図である。FIG. 1 is a diagram showing one embodiment of the present invention.
【図２】スクリュウポンプの図である。FIG. 2 is a view of a screw pump.
【図３】（ａ）はコイル状電熱器、（ｂ）は棒状電熱器
の図である。3A is a diagram of a coil-shaped electric heater, and FIG. 3B is a diagram of a rod-shaped electric heater.
【図４】別の解凍電熱器装置の例で、中央に循環用の内
管を設け、その外周にスクリュウを取着し、ピニオン・
ギヤで、該スクリュウ付循環用内管を回転駆動し液体の
熱媒体を強制循環してなる装置の図である。FIG. 4 shows another example of a thawing electric heater device, in which an inner pipe for circulation is provided in the center, and a screw is attached to the outer periphery thereof, and a pinion and an inner pipe are provided.
FIG. 3 is a view of an apparatus formed by rotating the screw-equipped inner pipe for rotation with a gear to forcibly circulate a liquid heat medium.
【図５】従来から用いられた一般的な凍土解凍法を示す
図である。FIG. 5 is a diagram showing a conventional frozen soil thawing method used conventionally.
１・・・解凍管、２・・・液体の熱媒体の循環用の内
管、２ａ・・・スクリュウ、３・・・電熱器、４・・・
ポンプ、４ａ・・・スクリュウポンプ、５・・・電動機
もしくは原動機等回転駆動できるもの、６・・・ピニオ
ン・ギヤ、７・・・温水タンク、８・・・給湯ヘッダ、
９・・・循環ヘッダ１０・・・給湯管、１１・・・循環
管、１２・・・投げ込み電熱器、１３・・・給湯ポン
プ、１４・・・凍土DESCRIPTION OF SYMBOLS 1 ... Decompression tube, 2 ... Inner tube for circulation of liquid heat medium, 2a ... Screw, 3 ... Electric heater, 4 ...
Pump, 4a: screw pump, 5: rotary drive such as electric motor or prime mover, 6: pinion gear, 7: hot water tank, 8: hot water supply header,
9: Circulation header 10: Hot water supply pipe, 11: Circulation pipe, 12: Throwing electric heater, 13: Hot water supply pump, 14: Frozen soil
───────────────────────────────────────────────────── フロントページの続き (72)発明者 白井 俊輔 東京都港区元赤坂１丁目２番７号 鹿島 建設株式会社内 (72)発明者 亀井 良至 東京都港区元赤坂１丁目２番７号 鹿島 建設株式会社内 (56)参考文献 特開 昭61−134417（ＪＰ，Ａ) 実開 昭58−54446（ＪＰ，Ｕ) 特公 昭55−18831（ＪＰ，Ｂ２) (58)調査した分野(Int.Cl.6，ＤＢ名) E21D 9/06 301 E02D 3/115 E21D 9/04 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shunsuke Shirai 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Ryoshi Kamei 1-2-7 Moto-Akasaka, Minato-ku, Tokyo No. Kashima Construction Co., Ltd. (56) References JP-A-61-134417 (JP, A) JP-A-58-54446 (JP, U) JP-B-55-18831 (JP, B2) (58) Fields surveyed (Int.Cl. 6 , DB name) E21D 9/06 301 E02D 3/115 E21D 9/04
Claims (1)
液体の熱媒体を充満し、該解凍管内部を液体の熱媒体が
循環し易いように、通路を分離する循環用の内管を設
け、電動機もしくは原動機等回転駆動できるものでポン
プを駆動し、強制的に熱媒体を循環させ、熱媒体の温度
上昇のため、電熱器を投入してなることを特徴とした凍
土解凍用電熱器装置。1. An electric heater device for thawing frozen ground, wherein a liquid heat medium is filled in a thawing tube, and a circulation inner tube for separating a passage so that the liquid heat medium easily circulates inside the thawing tube. An electric heater for thawing frozen soil, characterized in that a pump is driven by a motor or a motor or the like that can be rotationally driven, a heat medium is forcibly circulated, and an electric heater is turned on to raise the temperature of the heat medium. Equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20803695A JP2904065B2 (en) | 1995-08-15 | 1995-08-15 | Electric heater device for frozen soil thawing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20803695A JP2904065B2 (en) | 1995-08-15 | 1995-08-15 | Electric heater device for frozen soil thawing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0953382A JPH0953382A (en) | 1997-02-25 |
| JP2904065B2 true JP2904065B2 (en) | 1999-06-14 |
Family
ID=16549600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20803695A Expired - Fee Related JP2904065B2 (en) | 1995-08-15 | 1995-08-15 | Electric heater device for frozen soil thawing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2904065B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7107774B2 (en) * | 2018-07-20 | 2022-07-27 | 基礎地盤コンサルタンツ株式会社 | Ground sample sampling method and sampling device |
-
1995
- 1995-08-15 JP JP20803695A patent/JP2904065B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0953382A (en) | 1997-02-25 |
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