JPH0615920B2 - How to protect joints in buried pipes - Google Patents
How to protect joints in buried pipesInfo
- Publication number
- JPH0615920B2 JPH0615920B2 JP1168436A JP16843689A JPH0615920B2 JP H0615920 B2 JPH0615920 B2 JP H0615920B2 JP 1168436 A JP1168436 A JP 1168436A JP 16843689 A JP16843689 A JP 16843689A JP H0615920 B2 JPH0615920 B2 JP H0615920B2
- Authority
- JP
- Japan
- Prior art keywords
- joint portion
- groove
- buried pipe
- foamed resin
- protecting
- 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 - Lifetime
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
- F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ この発明は、埋設管における継手部の保護方法に関する
ものである。Description: TECHNICAL FIELD The present invention relates to a method for protecting a joint portion in a buried pipe.
［従来の技術］ 従来、上下水道管やガス管等の、歴青系やプラスチック
系等の被覆材１により被覆された埋設管２を接続するに
は、第４図に示すように、管継手部の周囲を会所掘りに
より掘削し、管端を突合わせ溶接により接合し、次い
で、継手部を歴青系やプラスチック系等の被覆材３によ
って被覆し、次いで、継手部周囲を山砂からなる埋設土
４によって埋戻し、そして、埋戻土４の上部に会所掘り
の際の発生土５により埋戻す。[Prior Art] Conventionally, in order to connect a buried pipe 2 coated with a coating material 1 such as a bituminous system or a plastic system, such as a water and sewer pipe or a gas pipe, as shown in FIG. The periphery of the joint is excavated by the hall, the pipe ends are joined by butt welding, and then the joint is covered with a covering material 3 of bituminous or plastic, and then the periphery of the joint is made of mountain sand. It is backfilled with the buried soil 4, and then backfilled with the generated soil 5 at the time of digging the hall above the backfill soil 4.
［発明が解決しようとする課題］ ところが、継手部の現地被覆作業および埋戻し作業に多
大の労力を要していた。[Problems to be Solved by the Invention] However, a great deal of labor is required for the on-site covering work and backfilling work of the joint portion.
［課題を解決するための手段］ この発明は、埋設管の継手部の周囲に会所掘りにより溝
を掘削し、次いで、前記溝内で前記埋設管を接合した
後、前記継手部を保護する方法であって、前記継手部外
面に無機ジンク系の防食塗装を施こし、次いで、前記溝
内に発泡樹脂を充填して、前記継手部周囲を前記発泡樹
脂によって覆うことに特徴を有するものである。[Means for Solving the Problem] The present invention provides a method for protecting a joint portion after excavating a groove around a joint portion of a buried pipe by hall digging and then joining the buried pipe in the groove. It is characterized in that an inorganic zinc-based anticorrosive coating is applied to the outer surface of the joint portion, then foam resin is filled in the groove, and the periphery of the joint portion is covered with the foam resin. .
次に、この発明の、埋設管における継手部の保護方法の
一実施態様を、図面を参照しながら説明する。Next, one embodiment of a method for protecting a joint portion in a buried pipe according to the present invention will be described with reference to the drawings.
第１図は、この発明の、埋設管における継手部の保護方
法の一実施態様を示す断面図、第２図は、第１図のＡ−
Ａ線断面図である。FIG. 1 is a sectional view showing an embodiment of a method for protecting a joint portion in a buried pipe according to the present invention, and FIG. 2 is an A- line in FIG.
It is an A line sectional view.
第１図および第２図に示すように、この発明の、埋設管
における継手部の保護方法は、埋設管２の継手部に会所
掘りにより溝６を掘削し、次いで、溝６内で埋設管２を
溶接により互いに接合した後、継手部を防食等の目的で
保護するに際して、継手部外面に無機ジンク系等の防食
塗装８を施こし、次いで、溝６の底部に発泡スチロール
等の発泡樹脂材料を注入して、これを発泡させ、埋設管
２の周囲を発泡樹脂７によって被覆するものである。発
泡樹脂７の上部は、溝６を会所掘りしたときの発生土９
の一部によって埋戻す。As shown in FIG. 1 and FIG. 2, the method for protecting the joint portion in the buried pipe according to the present invention is to dig a groove 6 in the joint portion of the buried pipe 2 by digging a hall, and then to fill the buried pipe in the groove 6. After the two are joined to each other by welding, when the joint is protected for the purpose of anticorrosion, the outer surface of the joint is coated with an anticorrosion coating 8 of inorganic zinc or the like, and then the bottom of the groove 6 is made of a foamed resin material such as Styrofoam. Is injected to foam this, and the periphery of the buried pipe 2 is covered with the foamed resin 7. The upper part of the foamed resin 7 is the soil 9 generated when the groove 6 is dug in the hall.
Backfill by part of.
このように、埋設管２の継手部の周囲に、透水性の小さ
い、発泡スチロール等の発泡樹脂を充填することによっ
て、継手部に軽微な防食塗装を施こすだけで済み、従来
のように歴青系やプラスチック系管の被覆材で被覆する
必要がない。また、埋戻土の使用量が減少することは勿
論、発泡樹脂の有するクッション作用によって、継手部
が礫等によって損傷を受けない。更に、発泡樹脂を溝内
全体に充填できる結果、埋設後、継手部が溝内において
移動することを確実に防止することができる。In this way, by filling the periphery of the joint portion of the buried pipe 2 with a foamed resin, such as Styrofoam, which has low water permeability, it is only necessary to apply a slight anticorrosion coating to the joint portion. There is no need to coat with system or plastic tube coatings. In addition, the amount of backfill soil used is reduced, and the joint portion is not damaged by gravel or the like due to the cushioning effect of the foamed resin. Further, as a result of being able to fill the inside of the groove with the foamed resin, it is possible to reliably prevent the joint portion from moving within the groove after being buried.
なお、この発明は、上述したような突合わせ継手部は勿
論のこと、第３図に示すように、ベル型隅肉溶接継手部
にも適用できることは云うまでもない。It goes without saying that the present invention can be applied not only to the butt joint portion as described above but also to a bell-shaped fillet weld joint portion as shown in FIG.
［発明の効果］ 以上説明したように、この発明によれば、以下のような
有用な効果がもたらされる。[Effects of the Invention] As described above, according to the present invention, the following useful effects are brought about.
発泡樹脂を溝内全体に充填できる結果、発泡樹脂と溝
面との間に隙間が形成されないことから、埋設後、継手
部が溝内において移動したり変形したりすることを確実
に防止することができる。As a result of being able to fill the inside of the groove with the foamed resin, there is no gap formed between the foamed resin and the groove surface, so it is possible to reliably prevent the joint part from moving or deforming in the groove after being embedded. You can
このように、発泡樹脂と溝面との間に隙間が形成され
ないことから、継手部には発泡樹脂を介して均等に応力
がかかり、この点からも継手部の損傷を防止できる。In this way, since no gap is formed between the foamed resin and the groove surface, stress is evenly applied to the joint portion through the foamed resin, and from this point also damage to the joint portion can be prevented.
発泡樹脂の有する小さい透水性によって、継手部に施
す防食を、軽微な無機ジンク系の防食塗装によって済ま
せることができる。Due to the small water permeability of the foamed resin, the corrosion protection applied to the joint portion can be completed by a slight inorganic zinc-based anticorrosion coating.
発泡樹脂の有するクッション性によって、礫等による
継手部の損傷を防止できる。しかも、発泡樹脂は、広範
囲に亘って充填されるので、局部的に発泡樹脂を充填す
る場合にくらべて発泡樹脂の損傷による防食効果の低下
を防止できる。Due to the cushioning property of the foamed resin, damage to the joint portion due to gravel or the like can be prevented. In addition, since the foamed resin is filled over a wide range, it is possible to prevent the anticorrosion effect from being lowered due to damage to the foamed resin, as compared with the case where the foamed resin is locally filled.
会所掘りした溝内に発泡樹脂を充填することから埋戻
しさの使用量を大幅に減少させることができる。Since the foamed resin is filled in the trench dug in the hall, the amount of backfilling used can be greatly reduced.
第１図は、この発明の、埋設管における継手部の保護方
法の一実施態様を示す断面図、第２図は、第１図のＡ−
Ａ線断面図、第３図は、他の実施態様を示す断面図、第
４図は、従来法を示す断面図である。図面において、 1,3……被覆材、 2……埋設管、 4……埋戻土、 5,9……発生土、 6……溝、 7……発泡樹脂、 8……防食塗装。FIG. 1 is a sectional view showing an embodiment of a method for protecting a joint portion in a buried pipe according to the present invention, and FIG. 2 is an A- line in FIG.
A sectional view taken along line A, FIG. 3 is a sectional view showing another embodiment, and FIG. 4 is a sectional view showing a conventional method. In the drawing, 1,3 ... Coating material, 2 ... Buried pipe, 4 ... Backfilled soil, 5,9 ... Generated soil, 6 ... Groove, 7 ... Foam resin, 8 ... Corrosion-resistant coating.
Claims (1)
を掘削し、次いで、前記溝内で前記埋設管を接合した
後、前記継手部を保護する方法であって、 前記継手部外面に無機ジンク系の防食塗装を施こし、次
いで、前記溝内に発泡樹脂を充填して、前記継手部周囲
を前記発泡樹脂によって覆うことを特徴とする、埋設管
における継手部の保護方法。1. A method for excavating a groove around a joint portion of a buried pipe by digging a hall, then joining the buried pipe in the groove, and protecting the joint portion, the outer surface of the joint portion A method for protecting a joint portion in a buried pipe, comprising: applying an inorganic zinc-based anticorrosion coating to the groove, filling the groove with a foam resin, and covering the periphery of the joint portion with the foam resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1168436A JPH0615920B2 (en) | 1989-06-30 | 1989-06-30 | How to protect joints in buried pipes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1168436A JPH0615920B2 (en) | 1989-06-30 | 1989-06-30 | How to protect joints in buried pipes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0333596A JPH0333596A (en) | 1991-02-13 |
| JPH0615920B2 true JPH0615920B2 (en) | 1994-03-02 |
Family
ID=15868083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1168436A Expired - Lifetime JPH0615920B2 (en) | 1989-06-30 | 1989-06-30 | How to protect joints in buried pipes |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0615920B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6976809B1 (en) * | 2004-09-14 | 2005-12-20 | Metz Paul A | Method of preventing frost heave stress concentrations in chilled buried pipelines |
| CN104214424A (en) * | 2014-09-30 | 2014-12-17 | 四川科宏石油天然气工程有限公司 | Hard porous material, protection method for buried pipeline, and pipeline structure with hard porous material |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS502523A (en) * | 1973-05-07 | 1975-01-11 | ||
| JPS56146191U (en) * | 1980-04-02 | 1981-11-04 | ||
| JPH01199094A (en) * | 1988-02-03 | 1989-08-10 | Yamauchi Corp | Anti-corrosion executing method for pipe joint part |
-
1989
- 1989-06-30 JP JP1168436A patent/JPH0615920B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0333596A (en) | 1991-02-13 |
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