JPH0642679A - Method of inserting rod-like member into pipe - Google Patents

Method of inserting rod-like member into pipe

Info

Publication number
JPH0642679A
JPH0642679A JP21578492A JP21578492A JPH0642679A JP H0642679 A JPH0642679 A JP H0642679A JP 21578492 A JP21578492 A JP 21578492A JP 21578492 A JP21578492 A JP 21578492A JP H0642679 A JPH0642679 A JP H0642679A
Authority
JP
Japan
Prior art keywords
pipe
new
existing
external fluid
new pipe
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.)
Pending
Application number
JP21578492A
Other languages
Japanese (ja)
Inventor
Kohei Ueda
上田耕平
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.)
Taisei Corp
Original Assignee
Taisei Corp
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 Taisei Corp filed Critical Taisei Corp
Priority to JP21578492A priority Critical patent/JPH0642679A/en
Publication of JPH0642679A publication Critical patent/JPH0642679A/en
Pending legal-status Critical Current

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  • Excavating Of Shafts Or Tunnels (AREA)

Abstract

PURPOSE:To facilitate the insertion of a rod-like member into an existing pipe by laying an external fluid in the pipe, by inserting the rod-like member which is a small bore pipe, into the pipe, and by laying an internal fluid or a wire-like member. CONSTITUTION:In the case of necessary replacement of an existing pipe 1 buried underground with a new pipe 1 due to corrosion or the like, the new pipe 2 is buried with the use of the space of the existing pipe 1, instead of excavation of the ground. The new pipe 2 is a small bore pipe having a bore which is smaller than that of the existing pipe, and before insertion of the same into the existing pipe, an external fluid 3 is laid in the existing pipe 1. During laying of the new pipe 2, a plug 4 is fitted in the forward end part of the pipe 2 so as to prevent the external fluid from entering thereinto. If the weight of the new pipe 2 is smaller than the buoyancy thereof caused by the external fluid, an additional weight such as a wire member is added to the new pipe 2 so as to adjust the weight of the new pipe 2.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、パイプ内に棒状体を挿
入する方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for inserting a rod-shaped body into a pipe.

【０００２】[0002]

【従来の技術】既設のパイプが腐食すると、それに変え
て、新設のパイプを配管する必要が生ずる。従来、工事
の簡素化などのために、既設のパイプ内を清掃した後、
管内に新設の小口径パイプを挿入することにより、２重
管構造にして補修する方法が行われている。パイプが既
設のパイプの口径より小さい小口径パイプになっても、
内壁面に付着物が付着していないため、パイプ内を通過
できる流量に、それ程、問題が生じない。2. Description of the Related Art When an existing pipe corrodes, it becomes necessary to replace it with a new pipe. Conventionally, after cleaning the inside of the existing pipe to simplify the construction,
There is a method of repairing a double pipe structure by inserting a new small-diameter pipe into the pipe. Even if the pipe becomes a small diameter pipe smaller than the diameter of the existing pipe,
Since there are no deposits on the inner wall surface, the flow rate that can be passed through the pipe does not cause much problem.

【０００３】[0003]

【発明が解決しようとする問題点】従来技術において
は、既設パイプの壁面と小口径パイプとの摩擦抵抗によ
り、小口径パイプを既設パイプ内に挿入することが困難
であった。In the prior art, it was difficult to insert the small diameter pipe into the existing pipe due to the frictional resistance between the wall surface of the existing pipe and the small diameter pipe.

【０００４】[0004]

【本発明の目的】本発明はパイプ内に棒状体を容易に挿
入できる方法を提供することにある。An object of the present invention is to provide a method for easily inserting a rod-shaped body into a pipe.

【０００５】[0005]

【問題点を解決するための手段】本発明は、パイプ内に
棒状体を挿入する方法において、該パイプ内に外部流動
体を配置し、該パイプ内に該棒状体を挿入すること、
又、該棒状体が小口径パイプであること、又、該小口径
パイプ内に内部流動体を配置すること、又、該小口径パ
イプ内に線状体を配置することを特徴とするパイプ内に
棒状体を挿入する方法にある。SUMMARY OF THE INVENTION The present invention is a method of inserting a rod into a pipe, wherein an external fluid is placed in the pipe and the rod is inserted into the pipe.
In the pipe, the rod-shaped body is a small-diameter pipe, an internal fluid is arranged in the small-diameter pipe, and a linear body is arranged in the small-diameter pipe. There is a method to insert a rod-shaped body into.

【０００６】[0006]

【実施例】以下、図面を参照しながら本発明の実施例に
ついて説明する。 ＜イ＞既設パイプ１ 既設パイプ１は、地中に埋設されており、腐食などのた
めに、新設パイプ２と交換する必要が生ずる。地盤の掘
削を行う代わりに、既設パイプ１内の空間を利用して、
新設パイプ２を埋設する。既設パイプ１は、円形である
必要はなく、内部に新設パイプ２が挿入できる空間を有
していれば良い。Embodiments of the present invention will be described below with reference to the drawings. <A> Existing pipe 1 The existing pipe 1 is buried in the ground and needs to be replaced with the new pipe 2 due to corrosion and the like. Instead of excavating the ground, use the space in the existing pipe 1,
Buried the new pipe 2. The existing pipe 1 does not have to be circular, and may have a space into which the new pipe 2 can be inserted.

【０００７】＜ロ＞新設パイプ２ 新設パイプ２は、既設パイプ内に挿入するために、既設
パイプより口径が小さい小口径パイプである。新設パイ
プ２も円形である必要はない。新設パイプ２の材質は、
パイプの用途と共に、挿入の際の条件により決められ
る。<B> New Pipe 2 The new pipe 2 is a small-diameter pipe having a smaller diameter than the existing pipe in order to be inserted into the existing pipe. The new pipe 2 also need not be circular. The material of the new pipe 2 is
It is decided by the condition of insertion as well as the use of the pipe.

【０００８】＜ハ＞外部流動体３ 新設パイプ２を既設パイプに挿入する前に、既設パイプ
１内部に外部流動体３を配置しておく。外部流動体３に
新設パイプの垂直抗力が低減し、挿入に必要な摩擦抵抗
力が低減する。外部流動体３は、既設パイプ１に充満さ
せても良く、または、既設パイプ１が水平に配置されて
いる場合は、一部入れて、浮力と共に潤滑性を持たすよ
うにしても良い。外部流動体３は、腐食防止、または、
潤滑性の流動体を使用するとよい。既設パイプ内に既に
海水が入っており、更に比重の大きい重量液が必要な場
合は、既設パイプ内において新設パイプ先端の前方に止
水ピグを配置し、海水と重量液を分離する。この状態で
新設パイプを挿入して行けば、重量液を節約することが
できる。<C> External Fluid 3 Before inserting the new pipe 2 into the existing pipe, the external fluid 3 is placed inside the existing pipe 1. The vertical drag force of the new pipe on the external fluid 3 is reduced, and the frictional resistance force required for insertion is reduced. The external fluid 3 may be filled in the existing pipe 1, or when the existing pipe 1 is horizontally arranged, a part of the external fluid 3 may be added to provide buoyancy and lubricity. The external fluid 3 is corrosion prevention, or
A lubricious fluid may be used. If seawater is already contained in the existing pipe and a heavy liquid with a higher specific gravity is needed, a water-stopping pig is placed in front of the tip of the new pipe in the existing pipe to separate seawater and heavy liquid. If a new pipe is inserted in this state, heavy liquid can be saved.

【０００９】＜ニ＞新設パイプの重量の付加 新設パイプ２の施設時にパイプ内に外部流動体が浸入し
ないように、先端に栓４を取り付けておく。外部流動体
３による浮力よりも新設パイプ２の重量が軽い場合は、
新設パイプに付加重量を加えて、新設パイプ２の重量を
調節しても良い。調整方法としては、 １）新設パイプの肉厚を増す。 ２）新設パイプ内に内部流動体５、例えば、水などの流
体や、バラストなどの粉体状のものを含有する流動体な
ど、を配置する。 ３）新設パイプ内に線状物６、例えば、更に小口径のパ
イプ、ワイヤ、鉄筋など、を挿入する。 ４）新設パイプの外周にコンクリートなどの重量のある
物を添加する。 ５）上記１）〜４）の幾つかを組み合わせる。<D> Addition of weight to new pipe When the new pipe 2 is installed, a plug 4 is attached to the tip of the pipe so that an external fluid does not enter the pipe. If the weight of the new pipe 2 is lighter than the buoyancy of the external fluid 3,
The weight of the new pipe 2 may be adjusted by adding additional weight to the new pipe. The adjustment method is as follows: 1) Increase the wall thickness of the new pipe. 2) An internal fluid 5, for example, a fluid containing a fluid such as water or a powdery material such as ballast is placed in a new pipe. 3) Insert the linear object 6, for example, a pipe having a smaller diameter, a wire, a reinforcing bar, etc. into the new pipe. 4) Add heavy material such as concrete to the outer circumference of the new pipe. 5) Combine some of the above 1) to 4).

【００１０】＜ホ＞新設パイプの重量の軽減 新設パイプの重量が浮力より重い場合は、以下のような
調整を行うと良い。 １）外部流動体の比重を大きくする。例えば、食塩、塩
化カルシウム、粘土鉱物などの無機物を溶解させたり、
塩化メチレンのような有機化合物を用いる。 ２）新設パイプに浮力を増大するパイプを周囲に取り付
ける。 ３）新設パイプの挿入時は、管内を空にしておき、挿入
後に必要なものを挿入する。 なお、実施例では、既設パイプ１内に新設パイプ２を挿
入しているが、パイプに限定する必要はなく、上位概念
である棒状体を挿入しても良い。特に、通信ケーブルな
どを配置すると、管内の空間を有効に利用できる。<E> Reducing the weight of the new pipe When the weight of the new pipe is heavier than the buoyancy, the following adjustment may be made. 1) Increase the specific gravity of the external fluid. For example, dissolving inorganic substances such as salt, calcium chloride, clay minerals,
An organic compound such as methylene chloride is used. 2) Attach a pipe that increases buoyancy to a new pipe around it. 3) When inserting a new pipe, empty the inside of the pipe and insert the necessary pipe after the insertion. In addition, in the embodiment, the new pipe 2 is inserted into the existing pipe 1, but it is not limited to the pipe, and a rod-shaped body which is a superordinate concept may be inserted. In particular, if a communication cable or the like is arranged, the space inside the pipe can be effectively used.

【００１１】[0011]

【発明の効果】本発明は以上説明したように次のような
格別な効果を得ることができる。 ＜イ＞新設パイプの浮力を利用するので、容易に既設パ
イプ内に新設のパイプを配管することができる。 ＜ロ＞外部流動体を防錆の性質を持たせることにより、
敷設後の防錆効果が高まる。 ＜ハ＞外部流動体を潤滑性にすることにより、浮力の利
用と共に、潤滑性により容易に敷設が行える。As described above, the present invention can obtain the following special effects. <B> Since the buoyancy of the new pipe is used, the new pipe can be easily installed inside the existing pipe. <B> By giving the external fluid anti-rust properties,
The rust prevention effect after installation is enhanced. <C> By making the external fluid lubricous, the buoyancy can be utilized and the laying can be easily performed by the lubricity.

【図面の簡単な説明】[Brief description of drawings]

【図１】既設パイプに新設パイプを挿入する説明図FIG. 1 is an explanatory view of inserting a new pipe into an existing pipe.

【図２】新設パイプの挿入時の断面図[Fig. 2] Cross-sectional view of a new pipe inserted

Claims (4)

【特許請求の範囲】[Claims] 【請求項１】パイプ内に棒状体を挿入する方法におい
て、 該パイプ内に外部流動体を配置し、 該パイプ内に該棒状体を挿入する、 ことを特徴とするパイプ内に棒状体を挿入する方法。1. A method for inserting a rod-shaped body into a pipe, wherein an external fluid is placed in the pipe, and the rod-shaped body is inserted into the pipe. how to. 【請求項２】該棒状体が該パイプより口径の小さい小口
径パイプであることを特徴とする特許請求の範囲第１項
記載のパイプ内に棒状体を挿入する方法。2. The method for inserting a rod-shaped body into a pipe according to claim 1, wherein the rod-shaped body is a small diameter pipe having a smaller diameter than the pipe. 【請求項３】該小口径パイプ内に内部流動体を配置する
ことを特徴とする特許請求の範囲第２項記載のパイプ内
に棒状体を挿入する方法。3. A method for inserting a rod-shaped body into a pipe according to claim 2, wherein an internal fluid is arranged in the small-diameter pipe. 【請求項４】該小口径パイプ内に線状体を配置すること
を特徴とする特許請求の範囲第３項記載のパイプ内に棒
状体を挿入する方法。4. The method for inserting a rod-shaped body into a pipe according to claim 3, wherein a linear body is arranged in the small-diameter pipe.
JP21578492A 1992-07-22 1992-07-22 Method of inserting rod-like member into pipe Pending JPH0642679A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21578492A JPH0642679A (en) 1992-07-22 1992-07-22 Method of inserting rod-like member into pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21578492A JPH0642679A (en) 1992-07-22 1992-07-22 Method of inserting rod-like member into pipe

Publications (1)

Publication Number Publication Date
JPH0642679A true JPH0642679A (en) 1994-02-18

Family

ID=16678178

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21578492A Pending JPH0642679A (en) 1992-07-22 1992-07-22 Method of inserting rod-like member into pipe

Country Status (1)

Country Link
JP (1) JPH0642679A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0816742A1 (en) * 1996-07-02 1998-01-07 Taisei Corporation Method and apparatus for reconstructing corroded pipes

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0816742A1 (en) * 1996-07-02 1998-01-07 Taisei Corporation Method and apparatus for reconstructing corroded pipes
US5887627A (en) * 1996-07-02 1999-03-30 Taisei Corporation Method for reconstructing corroded pipes

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