JP2821542B2 - Gas leak emergency stop method - Google Patents
Gas leak emergency stop methodInfo
- Publication number
- JP2821542B2 JP2821542B2 JP6207247A JP20724794A JP2821542B2 JP 2821542 B2 JP2821542 B2 JP 2821542B2 JP 6207247 A JP6207247 A JP 6207247A JP 20724794 A JP20724794 A JP 20724794A JP 2821542 B2 JP2821542 B2 JP 2821542B2
- Authority
- JP
- Japan
- Prior art keywords
- cut
- gas
- pavement
- synthetic resin
- gas leakage
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/10—Means for stopping flow from or in pipes or hoses
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pipe Accessories (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、舗装カッターにより切
断損傷を受けたガス導管からのガスの漏洩を応急的に阻
止するガス漏洩応急阻止方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas leakage emergency prevention method for temporarily preventing gas from leaking from a gas conduit cut and damaged by a pavement cutter.
【０００２】[0002]
【従来の技術】都市ガスを供給すべく地中に埋設される
ガス導管は、地中の障害物である暗渠や水道管、あるい
は通信ケーブル収容パイプなど避けて配管する必要があ
り、地中の比較的に浅い箇所に埋設せざるを得ない場合
もある。図５（ａ），（ｂ）は、その一例として本管か
ら分岐する供給管ａを示したもので、その埋設深さは、
図５（ａ）に示す中級車道では７ｃｍ程度、図５（ｂ）
に示す歩道では３ｃｍ程度となっている。そしてこの供
給管等ａを埋設した道路は、殆どがアスファルトなどの
舗装道路ｂとなっており、この場合、供給管等ａは舗装
層ｃの下部に位置して埋設されている。2. Description of the Related Art Gas pipes buried underground to supply city gas must be laid underground to avoid obstacles such as culverts, water pipes, and communication cable housing pipes. In some cases, it must be buried in a relatively shallow place. FIGS. 5A and 5B show a supply pipe a branched from the main pipe as an example, and the burial depth is
In the intermediate road shown in FIG. 5A, the distance is about 7 cm.
The sidewalk shown in FIG. The road in which the supply pipes a are buried is almost a pavement road b such as asphalt. In this case, the supply pipes a are buried under the pavement layer c.
【０００３】ここで前述のように供給管等ａを埋設した
舗装道路ｂは、電気，ガス，水道などの各種道路工事に
際し、その舗装層ｃが舗装カッターにより切断されるこ
とがあり、この場合、供給管等ａは舗装層ｃの下部に位
置していることから、舗装カッターのカッターブレード
により誤って切断される虞がある。[0003] As described above, the pavement layer c may be cut by a pavement cutter on the pavement road b in which the supply pipes a are buried as described above, when various road works such as electricity, gas and water supply are performed. Since the supply pipe a is located below the pavement layer c, there is a possibility that the supply pipe a may be cut by a cutter blade of the pavement cutter by mistake.
【０００４】そして一旦供給管等ａが切断損傷を受ける
と、その切断損傷箇所からガスが漏洩して二次災害を招
く虞があることから、その場合には一刻も早く確実にガ
ス漏洩を阻止する必要がある。[0004] Once the supply pipe a is cut and damaged, gas may leak from the cut and damaged portion, possibly causing a secondary disaster. In such a case, gas leakage is surely prevented as soon as possible. There is a need to.
【０００５】このようなガス漏洩阻止の対策として、本
発明の発明者らは、切断損傷を受けた供給管内にグリス
ガンを使用して低粘度のグリスを充填することを試み
た。図６はその実施状況を示すもので、グリスガンｄに
取付けた扁平断面の注入パイプｅを舗装層ｃの切込み溝
ｆ及び供給管ａの切断損傷箇所ｇを通して供給管ａ内に
挿入し、この状態でグリスガンｄにより低粘度のグリス
ｈを供給管ａ内に注入した。As a countermeasure against such gas leakage, the inventors of the present invention have attempted to fill the supply pipe damaged by cutting with a low-viscosity grease using a grease gun. FIG. 6 shows the state of implementation, in which the injection pipe e having a flat cross section attached to the grease gun d is inserted into the supply pipe a through the cut groove f of the pavement layer c and the cut damage point g of the supply pipe a. Then, low-viscosity grease h was injected into the supply pipe a by the grease gun d.
【０００６】[0006]
【発明が解決しようとする課題】ところで、図６に示し
た試案では、グリスｈは低粘度であるため供給管ａの管
底に沿って流れ易く、供給管ａの切断損傷箇所ｇをグリ
スｈで確実に閉塞することは難しいことが判明した。ま
たこの試案では、注入パイプｅの先端を供給管ａの切断
損傷箇所ｇを通して供給管ａ内に挿入する必要があり、
その作業が難しく煩雑であることも判明した。By the way, in the proposal shown in FIG. 6, the grease h has a low viscosity, so that it easily flows along the bottom of the supply pipe a, and the cut g of the supply pipe a is damaged by the grease h. It was found that it was difficult to reliably close the container. Further, in this proposal, it is necessary to insert the tip of the injection pipe e into the supply pipe a through the cut damage point g of the supply pipe a,
The work proved to be difficult and complicated.
【０００７】そこで本発明は、舗装カッターにより切断
損傷を受けたガス導管からのガス漏洩を簡単かつ迅速に
阻止できるガス漏洩応急阻止方法を提供することを目的
とする。Accordingly, an object of the present invention is to provide a gas leakage emergency prevention method which can easily and quickly prevent gas leakage from a gas conduit that has been cut and damaged by a pavement cutter.
【０００８】[0008]
【課題を解決するための手段】この目的のため本発明
は、舗装カッターのカッターブレードにより切断損傷を
受けたガス導管からのガスの漏洩を応急的に阻止するガ
ス漏洩応急阻止方法であって、上記カッターブレードに
より切り込まれた舗装層の切込み溝を介して発泡性合成
樹脂の注入ノズルをガス導管の切断損傷箇所に臨ませて
発泡性合成樹脂を該切込み溝内に注入し、続いて上記切
込み溝内に押し込み板を押し込むことで、発泡性合成樹
脂をガス導管の切断損傷箇所に圧入して、ガス導管の切
断損傷箇所を閉塞することを特徴とする。SUMMARY OF THE INVENTION To this end, the present invention provides a gas leakage emergency stop method for temporarily stopping gas leakage from a gas conduit that has been cut and damaged by a cutter blade of a pavement cutter. the injection nozzle of the expandable synthetic resin so as to face the cut damaged portion of the gas conduit through the notches of the pavement layers cut by the cutter blade
Inject foamable synthetic resin into the cut groove, and then
By pushing the push plate into the groove, the synthetic foam
It is characterized in that the fat is pressed into the cut and damaged portion of the gas conduit to close the cut and damaged portion of the gas conduit.
【０００９】[0009]
【作用】このような手段を採用した本発明によるガス漏
洩応急阻止方法では、発泡性合成樹脂の注入ノズルを舗
装層の切込み溝を介してガス導管の切断損傷箇所に臨ま
せて発泡性合成樹脂を該切込み溝内に注入し、続いて押
し込み板により発泡性合成樹脂を切込み溝内からガス導
管の切断損傷箇所に圧入することで、発泡性合成樹脂は
無理なく確実に該切断損傷箇所に圧入され、この発泡性
合成樹脂の発泡固 化によりガス導管の切断損傷箇所が確
実に閉塞され、切断損傷箇所からのガス漏洩が阻止され
る。 In the gas leakage emergency prevention method according to the present invention employing such a means, the foamable synthetic resin injection nozzle faces the cut damage portion of the gas conduit through the cut groove of the pavement layer and is exposed to the foamable synthetic resin. Into the cut groove, and then press
Gas guides foamable synthetic resin from inside the cut groove
The foamable synthetic resin is pressed into
It is pressed into the cut damage area without difficulty,
Make cutting damaged portion of the gas conduit by foaming solid of synthetic resin
It is actually blocked, preventing gas leakage from the cut damage point.
You.
【００１０】[0010]
【実施例】以下、本発明の一実施例を添付の図面を参照
して具体的に説明する。図１は、第１実施例によるガス
漏洩応急阻止方法の作業工程を示し、このガス漏洩応急
阻止方法は、例えば図２に示すように、舗装道路１の砕
石層１ａ上に配置されてアスファルトの舗装層１ｂの下
部に埋設されているガス導管としての供給管２が、舗装
カッターのカッターブレード３により切断損傷を受けた
場合に、その切断損傷箇所２ａを閉塞してガス漏洩を応
急的に阻止するものである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to the accompanying drawings. FIG. 1 shows the working steps of the gas leakage emergency stop method according to the first embodiment. This gas leakage emergency stop method is disposed on a crushed stone layer 1a of a pavement road 1 as shown in FIG. When the supply pipe 2 as a gas conduit buried under the pavement layer 1b is cut and damaged by the cutter blade 3 of the pavement cutter, the cut damage portion 2a is closed and gas leakage is immediately stopped. Is what you do.
【００１１】まず図１の（ａ），（ｂ）に示すように、
一液発泡性の合成樹脂であるウレタンフォームを収容し
たボンベ４の注入ノズル４ａをカッターブレード３によ
り切り込まれた舗装層１ｂの切込み溝１ｃを介して供給
管２の切断損傷箇所２ａに臨ませ、この注入ノズル４ａ
からウレタンフォーム５を切断損傷箇所２ａに注入す
る。First, as shown in FIGS. 1A and 1B,
The injection nozzle 4a of the cylinder 4 containing urethane foam, which is a one-part foaming synthetic resin, is exposed to the cut damaged portion 2a of the supply pipe 2 through the cut groove 1c of the pavement layer 1b cut by the cutter blade 3. , This injection nozzle 4a
, Urethane foam 5 is injected into the cut damaged portion 2a.
【００１２】ここで、前記カッターブレード３は、一般
に直径３５０ｍｍ、厚み約２．５ｍｍであることから、
この厚みに対応してボンベ４の注入ノズル４ａは厚み
２．５ｍｍの扁平断面に形成してある。また、前記ウレ
タンフォーム５の注入圧は、切断損傷箇所２ａから噴出
するガス圧より大きいものであり、例えば２５０ｍｍＡ
ｑ以上となっている。Here, the cutter blade 3 generally has a diameter of 350 mm and a thickness of about 2.5 mm.
The injection nozzle 4a of the cylinder 4 has a flat cross section of 2.5 mm in thickness corresponding to this thickness. The injection pressure of the urethane foam 5 is higher than the gas pressure ejected from the cut damage portion 2a, and is, for example, 250 mmA.
q or more.
【００１３】供給管２の切断損傷箇所２ａに注入された
ウレタンフォーム５は、図１（ｃ），（ｄ）に示すよう
に迅速に発泡固化し、切断損傷箇所２ａに密着してそこ
を閉塞するのであり、こうして切断損傷箇所２ａからの
ガス漏洩が簡単かつ迅速に阻止される。そしてこの閉塞
状態は、少なくとも３時間程度は保持されるから、その
間に切断損傷箇所２ａの本修理、あるいはガス遮断工事
を行い、ガス漏洩に伴う二次災害を防止する。The urethane foam 5 injected into the cut and damaged portion 2a of the supply pipe 2 rapidly foams and solidifies as shown in FIGS. 1 (c) and 1 (d), closes and closes the cut and damaged portion 2a. Thus, gas leakage from the cut damage portion 2a is easily and quickly prevented. Since this closed state is maintained for at least about 3 hours, the repair of the cut and damaged portion 2a or the gas shutoff work is performed during that time to prevent a secondary disaster caused by gas leakage.
【００１４】次ぎに、図３に示すような押し込み板６を
使用する第２実施例のガス漏洩応急阻止方法について図
４により説明する。まず押し込み板６について説明する
と、これは、幅３１０ｍｍ、高さ１００ｍｍの長方形の
上部６ａに、前記カッターブレード３の半径より小さい
半径１５５ｍｍの半円をなす下部６ｂが連続した正面形
状を有するベニヤ板からなり、その厚みはカッターブレ
ード３と同じ約２．５ｍｍに設定されている。Next, a gas leakage emergency prevention method according to a second embodiment using a pushing plate 6 as shown in FIG. 3 will be described with reference to FIG. First, the push plate 6 will be described. This is a veneer plate having a front shape in which a rectangular upper portion 6a having a width of 310 mm and a height of 100 mm and a lower portion 6b having a semicircle having a radius of 155 mm smaller than the radius of the cutter blade 3 are continuous. And its thickness is set to about 2.5 mm, which is the same as that of the cutter blade 3.
【００１５】ここで図４（ａ），（ｂ）に示すように、
舗装カッターのカッターブレード３により切り込まれた
舗装層１ｂの切込み溝１ｃ内に、前記ボンベ４の注入ノ
ズル４ａを臨ませ、この注入ノズル４ａから供給管２の
切断損傷箇所２ａの上方の切込み溝１ｃ内にウレタンフ
ォーム５を注入する。Here, as shown in FIGS. 4A and 4B,
The injection nozzle 4a of the cylinder 4 faces the cut groove 1c of the pavement layer 1b cut by the cutter blade 3 of the pavement cutter, and the cut nozzle above the cut damaged portion 2a of the supply pipe 2 from the injection nozzle 4a. Urethane foam 5 is injected into 1c.
【００１６】次に、供給管２の上方から舗装層１ｂの切
込み溝１ｃ内に押し込み板６をその半円をなす下部６ｂ
側から押し込み、ウレタンフォーム５を供給管２の切断
損傷箇所２ａ内に圧入する（図４（ｃ），（ｄ）参
照）。Next, the pushing plate 6 is inserted into the cut groove 1c of the pavement layer 1b from above the supply pipe 2 and the lower plate 6b forming a semicircle is inserted.
Then, the urethane foam 5 is pressed into the cut and damaged portion 2a of the supply pipe 2 (see FIGS. 4C and 4D).
【００１７】ここで、前記押し込み板６の厚みがカッタ
ーブレード３と同じ約２．５ｍｍであるのに対し、切込
み溝１ｃは平均して３．５ｍｍ位となっているので、押
し込み板６は切込み溝１ｃ及び切断損傷箇所２ａ内へ簡
単かつ確実に押し込むことができ、ウレタンフォーム５
は無理なく確実に供給管２の切断損傷箇所２ａに圧入さ
れる。Here, while the thickness of the pushing plate 6 is about 2.5 mm, which is the same as that of the cutter blade 3, the cutting groove 1c is about 3.5 mm on average. The urethane foam 5 can be easily and reliably pushed into the groove 1c and the cut damage portion 2a.
Is press-fitted into the cut damaged portion 2a of the supply pipe 2 without difficulty.
【００１８】こうして圧入されたウレタンフォーム５
は、前述と同様に迅速に発泡固化し、切断損傷箇所２ａ
に密着してそこを閉塞することから、切断損傷箇所２ａ
からのガス漏洩が迅速かつ確実に阻止される。この閉塞
状態は前述のように少なくとも３時間程度保持されるか
ら、その間に切断損傷箇所２ａの本修理、あるいはガス
遮断工事を行い、ガス漏洩に伴う二次災害を防止する。The urethane foam 5 thus press-fitted
Is rapidly foamed and solidified in the same manner as described above, and the cut damage portion 2a
2a because it is tightly closed to
Gas leakage from the air is quickly and reliably prevented. Since the closed state is maintained for at least about 3 hours as described above, the repair of the cut damaged portion 2a or the gas shutoff work is performed during that time to prevent a secondary disaster caused by gas leakage.
【００１９】なお本実施例では、発泡性合成樹脂とし
て、安価で入手し易く、取扱いや運搬に便利なボンベ４
入りの一液発泡性のウレタンフォームを使用したが、こ
れに限らずウレタン変性ポリイソシアヌレートフォー
ム、ポリイソシアヌレートフォーム、フェノールフォー
ム等の発泡性合成樹脂が使用でき、これらは発泡機を使
用する二液発泡性のものでも構わない。In this embodiment, as a foamable synthetic resin, a cylinder 4 which is inexpensive, easily available, and convenient to handle and transport.
A one-part foamed urethane foam containing foam was used, but not limited thereto, and foamable synthetic resins such as urethane-modified polyisocyanurate foam, polyisocyanurate foam, and phenol foam can be used. Liquid foaming materials may be used.
【００２０】[0020]
【発明の効果】以上説明したとおり本発明によれば、発
泡性合成樹脂の注入ノズルを舗装層の切込み溝を介して
ガス導管の切断損傷箇所に臨ませて発泡性合成樹脂を該
切込み溝内に注入し、続いて押し込み板により発泡性合
成樹脂を切込み溝内からガス導管の切断損傷箇所に圧入
することで、発泡性合成樹脂は無理なく確実に該切断損
傷箇所に圧入され、この発泡性合成樹脂の発泡固化によ
りガス導管の切断損傷箇所が確実に閉塞される。従っ
て、舗装カッターにより切断損傷を受けたガス導管から
のガス漏洩を迅速かつ確実に阻止することができる。As described above, according to the present invention, the foamable synthetic resin injection nozzle is brought into contact with the cut damage portion of the gas conduit through the cut groove of the pavement layer, and the foamable synthetic resin is discharged.
Inject into the cut groove, and then press the foam
Pressing the synthetic resin into the gas pipe cut damage area from inside the cut groove
By doing so, the foamable synthetic resin will surely and without difficulty
The foamed plastic is solidified by foaming
The cut damage point of the gas conduit is reliably blocked. Therefore, it is possible to quickly and reliably prevent gas leakage from the gas conduit that has been cut and damaged by the pavement cutter.
【図１】（ａ）ないし（ｄ）は、本発明によるガス漏洩
応急阻止方法の第１実施例の作業工程を示す図である。1 (a) to 1 (d) are views showing working steps of a first embodiment of a gas leakage emergency stop method according to the present invention.
【図２】第１，第２実施例が適用される舗装道路の断面
図である。FIG. 2 is a sectional view of a paved road to which the first and second embodiments are applied;
【図３】第２実施例に使用する押し込み治具の正面図で
ある。FIG. 3 is a front view of a pushing jig used in a second embodiment.
【図４】（ａ）ないし（ｄ）は、本発明によるガス漏洩
応急阻止方法の第２実施例の作業工程を示す図である。4 (a) to 4 (d) are views showing working steps of a second embodiment of the gas leakage emergency stop method according to the present invention.
【図５】ガス導管の一般的な埋設状況を示す舗装道路の
断面図であり、（ａ）は中級車道の断面図、（ｂ）は歩
道の断面図である。FIGS. 5A and 5B are cross-sectional views of a pavement road showing a general burial state of a gas conduit, where FIG. 5A is a cross-sectional view of an intermediate-level roadway and FIG. 5B is a cross-sectional view of a sidewalk.
【図６】従来例としての一試案の実施状況を示す舗装道
路の断面図である。FIG. 6 is a cross-sectional view of a pavement road showing the state of implementation of a proposal as a conventional example.
１ 舗装道路 １ａ 砕石層 １ｂ 舗装層 １ｃ 切込み溝 ２ 供給管 ２ａ 切断損傷箇所 ３ カッターブレード ４ ボンベ ４ａ 注入ノズル ５ ウレタンフォーム ６ 押し込み板 ６ａ 上部 ６ｂ 下部 DESCRIPTION OF SYMBOLS 1 Paved road 1a Crushed stone layer 1b Pavement layer 1c Cut groove 2 Supply pipe 2a Cutting damage point 3 Cutter blade 4 Cylinder 4a Injection nozzle 5 Urethane foam 6 Push plate 6a Upper part 6b Lower part
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) F16L 55/10 F16L 55/16──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. 6 , DB name) F16L 55/10 F16L 55/16
Claims (1)
切断損傷を受けたガス導管からのガスの漏洩を応急的に
阻止するガス漏洩応急阻止方法であって、 上記カッターブレードにより切り込まれた舗装層の切込
み溝を介して発泡性合成樹脂の注入ノズルをガス導管の
切断損傷箇所に臨ませて発泡性合成樹脂を該切込み溝内
に注入し、 続いて上記切込み溝内に押し込み板を押し込むことで、
発泡性合成樹脂をガス導管の切断損傷箇所に圧入して、
ガス導管の切断損傷箇所を閉塞することを特徴とするガ
ス漏洩応急阻止方法。1. A gas leakage emergency prevention method for urgently preventing gas leakage from a gas conduit that has been cut and damaged by a cutter blade of a pavement cutter, the method comprising cutting the pavement layer cut by the cutter blade. The foamable synthetic resin injection nozzle faces the cut and damaged portion of the gas conduit through the groove, and the foamable synthetic resin is inserted into the cut groove.
Poured into, followed by pressing the plate pressed into the cut groove,
Press the foamable synthetic resin into the gas pipe at the cut damage point,
A gas leakage emergency prevention method characterized by closing a cut damaged portion of a gas conduit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6207247A JP2821542B2 (en) | 1994-08-31 | 1994-08-31 | Gas leak emergency stop method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6207247A JP2821542B2 (en) | 1994-08-31 | 1994-08-31 | Gas leak emergency stop method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0875081A JPH0875081A (en) | 1996-03-19 |
| JP2821542B2 true JP2821542B2 (en) | 1998-11-05 |
Family
ID=16536654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6207247A Expired - Fee Related JP2821542B2 (en) | 1994-08-31 | 1994-08-31 | Gas leak emergency stop method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2821542B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101325224B1 (en) | 2011-09-20 | 2013-11-04 | 코오롱글로벌 주식회사 | Repair method for pipeline |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5244573B2 (en) * | 2008-12-15 | 2013-07-24 | 東京瓦斯株式会社 | Gas supply construction method in case of disaster by buried pipeline |
| JP5638274B2 (en) * | 2010-04-08 | 2014-12-10 | 東京瓦斯株式会社 | Emergency gas shutoff method and gas shutoff device for gas conduit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0333592A (en) * | 1989-06-30 | 1991-02-13 | Nkk Corp | Buried pipe repairing method |
-
1994
- 1994-08-31 JP JP6207247A patent/JP2821542B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101325224B1 (en) | 2011-09-20 | 2013-11-04 | 코오롱글로벌 주식회사 | Repair method for pipeline |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0875081A (en) | 1996-03-19 |
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