JPH0333596A - How to protect joints in buried pipes - Google Patents

How to protect joints in buried pipes

Info

Publication number
JPH0333596A
JPH0333596A JP1168436A JP16843689A JPH0333596A JP H0333596 A JPH0333596 A JP H0333596A JP 1168436 A JP1168436 A JP 1168436A JP 16843689 A JP16843689 A JP 16843689A JP H0333596 A JPH0333596 A JP H0333596A
Authority
JP
Japan
Prior art keywords
joint
ditch
buried pipes
coupling part
foaming resin
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.)
Granted
Application number
JP1168436A
Other languages
Japanese (ja)
Other versions
JPH0615920B2 (en
Inventor
Masaaki Watanabe
正明 渡辺
Yoshikazu Nakajima
良和 中島
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Engineering Corp
Original Assignee
NKK Corp
Nippon Kokan Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NKK Corp, Nippon Kokan Ltd filed Critical NKK Corp
Priority to JP1168436A priority Critical patent/JPH0615920B2/en
Publication of JPH0333596A publication Critical patent/JPH0333596A/en
Publication of JPH0615920B2 publication Critical patent/JPH0615920B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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)

Abstract

PURPOSE:To reduce the applied quantity of the earth to be refilled and lighten the field covering work of coupling parts by bonding buried pipes in a ditch drilled by means of a meeting place drilling method, applying anticorrosive coating to the outer surface of the coupling part and filling foaming resin around the coupling part. CONSTITUTION:A ditch 6 is drilled at the coupling parts of buried pipes 2 by a meeting place drilling method, and the buried pipes 2 are connected to each other in the ditch 6 by welding. Anticorrosive coating 8 of inorganic zinc or the like is then applied to the outer surface of the coupling part in order to protect the coupling part from corrosion. Foaming resin material made of foaming styrene and the like is further injected to the bottom part of the ditch 6 and foamed to cover around the buried pipes 2 with foaming resin 7. The upper part of the foaming resin 7 is backfilled with the earth generated by drilling the ditch for a meeting place. As a result, the applied quantity of the earth to be refilled can be reduced, as well as the field covering work of the coupling part can be lightened.

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。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for protecting a joint 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上４
によって埋戻し、そして、埋戻上４の上部に会所掘りの
際の発生±５により埋戻す。[Prior Art] Conventionally, in order to connect buried pipes 2 such as water and sewage pipes and gas pipes covered with coating material 1 such as bituminous or plastic, pipe joints are used as shown in Fig. 4. The area around the joint is excavated by digging, the pipe ends are joined by butt welding, the joint is covered with a covering material 3 made of bituminous or plastic, and then the area around the joint is made of mountain sand. Buried top 4
Then, the upper part of backfilling top 4 was backfilled by ±5 that occurred when digging the hole.

［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, the on-site covering work and backfilling work of the joint portion required a great deal of effort.

［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
に防食塗装を施こし、次いで、前記継手部周囲に発泡樹
脂を充填することに特徴を有するものである。[Means for Solving the Problems] The present invention provides a method for protecting the joint portion after excavating a trench around the joint portion of a buried pipe by trench digging, and then joining the buried pipe within the trench. The present invention is characterized in that an anticorrosive coating is applied to the outer surface of the joint, and then a foamed resin is filled around the joint.

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２− する。Next, an embodiment of the method for protecting a joint 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 the method for protecting a joint in a buried pipe according to the present invention, and 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
塗装置を施こし、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。As shown in FIGS. 1 and 2, the method of protecting the joint portion of a buried pipe according to the present invention involves excavating a groove 6 at the joint portion of a buried pipe 2 by trench digging, and then 2 are joined to each other by welding, and in order to protect the joint for corrosion prevention purposes, the outer surface of the joint is coated with an anticorrosive coating such as inorganic zinc, and then the bottom of the groove 6 is coated with a foamed resin material such as styrofoam. The buried pipe 2 is covered with a foamed resin 7 by injecting and foaming the foamed resin.

発泡樹脂７の上部は、溝６を会所掘りしたときの発生±
９の一部によって埋戻す。The upper part of the foamed resin 7 is the area where the groove 6 was dug.
Backfill with part of 9.

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、埋戻上の使用量が減少することは勿
論、発泡樹脂の有するクツ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。In this way, by filling the area around the joint of the buried pipe 2 with foamed resin such as foamed polystyrene, which has low water permeability, it is only necessary to apply a light anti-corrosion coating to the joint, and it is not possible to use bitumen as in the past. There is no need to cover the pipe with a plastic or plastic pipe coating material. In addition, the amount of backfill used is reduced, and the cushioning effect of the foamed resin prevents the joint from being damaged by gravel or the like.

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 is applicable not only to the above-mentioned butt joint but also to a bell-shaped fillet weld joint 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、継手部の周囲
に発泡樹脂を充填することによって、埋戻上の使用量が
減少することは勿論、継手部の現地被覆作業が軽減され
る等、種々の有用な効果がもたらされる。[Effects of the Invention] As explained above, according to the present invention, by filling the area around the joint with foamed resin, not only the amount of backfilling used can be reduced, but also the on-site covering work of the joint can be reduced. Various useful effects are brought about, such as reduction in

【図面の簡単な説明】[Brief explanation of 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、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、 ■、３・・・被覆材、 ４・・・埋戻上、 ６・・・溝、 ８・・・防食塗装。 ２・・・埋設管、 ５．９・・発生土、 ７・・・発泡樹脂、FIG. 1 is a sectional view showing an embodiment of the method for protecting a joint in a buried pipe according to the present invention, and FIG.
FIG. 3 is 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, ■, 3... Covering material, 4... Backfill top, 6... Groove, 8... Anti-corrosion coating. 2... Buried pipe, 5.9... Generated soil, 7... Foamed resin,

Claims (1)

【特許請求の範囲】[Claims] １　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、前記継手部外面に防食塗
装を施こし、次いで、前記継手部周囲に発泡樹脂を充填
することを特徴とする、埋設管における継手部の保護方
法。1. A method for protecting the joint after excavating a trench around the joint of a buried pipe and then joining the buried pipe within the trench, the method comprising applying anti-corrosion coating to the outer surface of the joint. 1. A method for protecting a joint in a buried pipe, the method comprising applying foamed resin to the joint, and then filling the periphery of the joint with foamed resin.
JP1168436A 1989-06-30 1989-06-30 How to protect joints in buried pipes Expired - Lifetime JPH0615920B2 (en)

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 true JPH0333596A (en) 1991-02-13
JPH0615920B2 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)

Cited By (2)

* Cited by examiner, † Cited by third party
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

Citations (3)

* Cited by examiner, † Cited by third party
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
JPH0615920B2 (en) 1994-03-02

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