JPH0814441A - How to insert a new pipe into an existing submarine pipe - Google Patents
How to insert a new pipe into an existing submarine pipeInfo
- Publication number
- JPH0814441A JPH0814441A JP6170442A JP17044294A JPH0814441A JP H0814441 A JPH0814441 A JP H0814441A JP 6170442 A JP6170442 A JP 6170442A JP 17044294 A JP17044294 A JP 17044294A JP H0814441 A JPH0814441 A JP H0814441A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- existing
- new
- new pipe
- seabed
- 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
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
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Earth Drilling (AREA)
Abstract
(57)【要約】
【目的】 既設海底配管内に小さな挿入力で新管を挿入
する。
【構成】 途中で切断した既設海底配管２の海底面８に
おける管端部に、海面上にて遠隔操作可能な水中挿入装
置を設け、海面上の作業台５で接続延長される新管１を
海底面８に設置した支持ローラ４を介して海底面８の既
設海底配管２の管端部から軸線を合わせて差込み、前記
水中挿入装置により挿入する。
(57) [Summary] [Purpose] Insert a new pipe into the existing seabed with a small insertion force. [Structure] An underwater insertion device that can be remotely operated on the sea surface is provided at the pipe end of the seabed 8 of the existing seabed 2 cut midway, and a new pipe 1 connected and extended by a workbench 5 on the sea surface is provided. The support roller 4 installed on the sea bottom 8 is inserted through the pipe end portion of the existing sea bottom pipe 2 on the sea bottom 8 with the axes aligned, and the submersible device is inserted.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、老朽化した既設管内に
新管を挿入して配管を再生する更生工法（パイプインパ
イプ工法）に関し、特に海底配管や管端が水中にある長
距離の既設管等の更生工法に適用した場合、有利な既設
管内への新管挿入方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rehabilitation construction method (pipe-in-pipe construction method) in which a new pipe is inserted into an aged existing pipe to regenerate the pipe. The present invention relates to an advantageous method for inserting a new pipe into an existing pipe when applied to a rehabilitation method for existing pipes.
【０００２】[0002]
【従来の技術】近年、老朽化した石油，ガス，水道等の
海底配管（既設管）を更生するニーズが高まり、既設管
内にこれより小径の新管を挿入する工法が提案され実用
化されている。この工法はパイプインパイプ工法と呼ば
れ、既設管をそのまま残し、新管の保護管としての役割
を持たせることができること、および既設管を利用して
配管できるため工事が容易で費用も割安であること等か
ら施工実績も多い。従来のパイプインパイプ工法を海底
配管または管端が水中にある既設管に適用する場合、図
４および図５に示すように水面上の作業台５（作業船）
に既設管２を引上げ、既設管２の管端に挿入装置１３を
取付けて新管１を接続延長しながら、挿入装置１３によ
り新管１を既設管２の管端から押込んで挿入する方法が
行われていた。2. Description of the Related Art In recent years, the need for rehabilitating aging oil, gas, water, etc. subsea pipes (existing pipes) has increased, and a method for inserting a new pipe having a smaller diameter into the existing pipe has been proposed and put into practical use. There is. This method is called the pipe-in-pipe method, and existing pipes can be left as they are, and they can serve as protective pipes for new pipes.Because existing pipes can be used for piping, construction is easy and costs are low. Because of this, there are many construction results. When the conventional pipe-in-pipe construction method is applied to an undersea pipe or an existing pipe whose pipe end is underwater, a workbench 5 (workboat) on the water surface as shown in FIGS.
The method of inserting the new pipe 1 from the pipe end of the existing pipe 2 by the insertion device 13 while pulling up the existing pipe 2 and attaching the insertion device 13 to the pipe end of the existing pipe 2 to connect and extend the new pipe 1 It was done.
【０００３】[0003]
【発明が解決しようとする課題】しかし、この工法で
は、図５に示すように水中部において、Ｓ字状に曲げて
既設管２を引上げるため、直線状の新管１を挿入装置１
３によって押込む際に、曲がり部Ａ，Ｂにおいて新管１
が既設管２の内面に接触して大きな挿入抵抗を生じさせ
る。このため、大きな挿入力を確保する必要から、挿入
装置が大型化し作業性が低下したり、長距離の既設管に
新管を挿入する場合に、挿入抵抗が過大となり挿入が困
難になる等の課題があった。However, in this construction method, as shown in FIG. 5, the existing pipe 2 is pulled up by bending it into an S-shape in the underwater portion, so that the new linear pipe 1 is inserted into the insertion device 1.
At the time of pushing in with the new pipe 3, the new pipe 1
Contacts the inner surface of the existing pipe 2 and causes a large insertion resistance. Therefore, since it is necessary to secure a large insertion force, the insertion device becomes large and the workability deteriorates, and when inserting a new pipe into a long-distance existing pipe, the insertion resistance becomes excessive and the insertion becomes difficult. There were challenges.
【０００４】[0004]
【課題を解決するための手段】前述の課題を有利に解決
するするために、本発明の既設海底配管内に新管を挿入
する方法においては、途中で切断した既設海底配管２の
海底面における管端部に、海面上にて遠隔操作可能な水
中挿入装置３を設け、海面上の作業台５で接続延長され
る新管１を海底面８に設置した支持ローラ４を介して海
底面８の既設海底配管２の管端部から軸線を合わせて差
込み、前記水中挿入装置３により挿入する。In order to advantageously solve the above-mentioned problems, in the method of inserting a new pipe into an existing seabed pipe of the present invention, in the seabed of the existing seabed pipe 2 cut midway, A submerged insertion device 3 that can be remotely operated on the sea surface is provided at the pipe end, and a new pipe 1 connected and extended by a work table 5 on the sea surface is installed on the sea bottom surface 8 via a support roller 4 on which the sea bottom surface 8 is provided. Aligning the axes from the end of the existing submarine pipe 2 and inserting the submarine pipe 2, the submersible pipe 3 is inserted.
【０００５】次に作用について説明する。本発明の手段
は、従来の技術のような既設海底配管２の引上げ部の水
中Ｓ字状曲がり区間で大きな挿入抵抗が発生し新管１の
挿入が困難な場合に適用すると効果が高い。すなわち、
新管１を海底面８の既設海底配管２の管端部２ａから軸
線を合わせて挿入するので、新管１が水中部のＳ字状の
既設管内を通過せず、図５で示したＡ，Ｂで生じていた
挿入抵抗が無い。したがって従来の技術に比べて小さな
挿入力で新管を挿入できるため、挿入作業が容易になる
と同時に、より長距離の既設管内への新管挿入が可能と
なる。Next, the operation will be described. The means of the present invention is highly effective when applied to a case where it is difficult to insert the new pipe 1 due to a large insertion resistance generated in the underwater S-shaped bending section of the pulling portion of the existing submarine pipe 2 as in the conventional technique. That is,
Since the new pipe 1 is inserted from the pipe end portion 2a of the existing seabed pipe 2 on the seabed 8 with the axis aligned, the new pipe 1 does not pass through the S-shaped existing pipe in the underwater portion, and the A shown in FIG. , B has no insertion resistance. Therefore, since the new pipe can be inserted with a smaller insertion force than that of the conventional technique, the insertion work is facilitated, and at the same time, the new pipe can be inserted into the existing pipe having a longer distance.
【０００６】[0006]
【実施例】以下、本発明の実施例を図面を参照しながら
説明する。図１は本発明の実施例を示すものである。ま
ず図１に示すように、既設海底配管２を海底面８におい
て、途中で切断した管端部２ａに水中挿入装置３を接続
固定する。水中挿入装置３は既設管２に反力を取り、新
管１を把持し、駆動機構により機械的な引込み力を新管
１に加えて、既設管２内で新管１を前進させる機能を備
えたもので、例えば図２に示すように、新管１の外周を
把持するクランプ１０と既設管２を把持するチャック機
構１１を配置し、前記クランプ１０とチャック機構１１
を連結するジャッキ１２とからなる駆動機構を使用す
る。前記クランプ１０とチャック機構１１は水圧や油圧
等の液圧シリンダ１４により開閉駆動される。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the present invention. First, as shown in FIG. 1, the existing submarine pipe 2 is connected and fixed to the submarine bottom surface 8 at the pipe end 2a that is cut midway. The submersible insertion device 3 has a function of applying a reaction force to the existing pipe 2, gripping the new pipe 1, and applying a mechanical retraction force to the new pipe 1 by the drive mechanism to advance the new pipe 1 in the existing pipe 2. For example, as shown in FIG. 2, a clamp 10 that holds the outer circumference of the new pipe 1 and a chuck mechanism 11 that holds the existing pipe 2 are arranged, and the clamp 10 and the chuck mechanism 11 are provided.
A drive mechanism consisting of a jack 12 for connecting The clamp 10 and the chuck mechanism 11 are opened and closed by a hydraulic cylinder 14 such as water pressure or hydraulic pressure.
【０００７】海底面８には水中挿入装置３に隣接または
作業上の支障とならない間隔をあけて支持ローラー４
を、既設海底配管２の軸線と新管１の軸線を合致するよ
うに配置する。なお支持ローラー４は必要に応じ複数を
配置してもよい。A support roller 4 is provided on the sea bottom 8 at a distance adjacent to the underwater insertion device 3 or at an interval which does not hinder work.
Are arranged so that the axis of the existing seabed 2 and the axis of the new pipe 1 match. A plurality of support rollers 4 may be arranged if necessary.
【０００８】支持ローラー４は、図３に示すように、Ｖ
字状に新管１を支え、管長手方向への新管１の移動が円
滑に行えるようにすると、新管１のずれやガタツキを抑
えることができるので作業性が向上する。新管１は海上
の作業台または作業船５上で順次接続され、新管１に過
大な変形が生じないように配管支持装置であるステイン
ガーローラ６で支えられながら海底面８へ送り出され
る。新管１は海底面８で支持ローラー４により支えら
れ、既設海底配管２の管端部２ａへ軸線を合わせて引込
むことができるように、レベルおよび方向を整えられ
る。水中挿入装置３は、海上から動力供給線７を介して
必要な電力または流体圧または圧縮空気等を供給され駆
動される。The supporting roller 4 is, as shown in FIG.
If the new pipe 1 is supported in the shape of a letter so that the new pipe 1 can be smoothly moved in the longitudinal direction of the pipe, deviation and rattling of the new pipe 1 can be suppressed and workability is improved. The new pipes 1 are sequentially connected on a work table or a work boat 5 on the sea, and sent out to the sea bottom 8 while being supported by a Steinger roller 6 which is a pipe support device so that the new pipe 1 is not excessively deformed. The new pipe 1 is supported by the support roller 4 on the sea bottom 8, and the level and direction are adjusted so that the new pipe 1 can be drawn into the pipe end portion 2a of the existing sea floor pipe 2 with its axis aligned. The submersible device 3 is driven by being supplied with necessary electric power, fluid pressure, compressed air, or the like from the sea via a power supply line 7.
【０００９】新管１の挿入は以下の手順の繰返しにより
行う。まずクランプ１０により新管１を把持した後、ジ
ャッキ１２を駆動しクランプ１０をチャック１１方向へ
引寄せ、新管１を既設海底配管２内へ軸線を合わせなが
ら挿入する。この時、海上の作業台または作業船５から
新管１を円滑に新管１の引込まれた長さだけ送り出す。
次にクランプ１０を開放し、ジャッキ１２を駆動し、ク
ランプ１０を所定の位置まで戻す。以上の動作を必要な
回数だけ繰返して既設海底配管２内に新管１の挿入を行
う。The new pipe 1 is inserted by repeating the following procedure. First, after the new pipe 1 is gripped by the clamp 10, the jack 12 is driven to draw the clamp 10 toward the chuck 11, and the new pipe 1 is inserted into the existing submarine pipe 2 while aligning its axis. At this time, the new pipe 1 is smoothly sent out from the workbench or the work boat 5 on the sea by the length of the new pipe 1 drawn.
Next, the clamp 10 is opened, the jack 12 is driven, and the clamp 10 is returned to a predetermined position. The above operation is repeated as many times as necessary to insert the new pipe 1 into the existing submarine pipe 2.
【００１０】[0010]
【発明の効果】本発明は前述のように構成されているか
ら、以下のような効果を得ることができる。 （イ）新管１が海底面８の既設管端部から挿入されるの
で、従来、生じていた既設管引上げ部のＳ字状部分１５
での挿入抵抗がない。 （ロ）また、海底面８に設置した支持ローラー４で支持
しながら水中挿入装置３により新管１を既設管２内へ軸
線を合わせて押込むので、新管１と既設管２の接触が少
なく挿入抵抗を小さく抑えられる。 （ハ）その結果、小さな挿入力で新管１を押込めるの
で、作業が容易になる。 （ニ）また、従来と同能力の挿入装置を用いた場合、よ
り長距離の既設海底配管内への新管挿入が可能となる。Since the present invention is constructed as described above, the following effects can be obtained. (A) Since the new pipe 1 is inserted from the end of the existing pipe on the sea bottom 8, the S-shaped portion 15 of the existing pipe pulling portion that has been generated conventionally is used.
There is no insertion resistance in. (B) Further, since the new pipe 1 is pushed into the existing pipe 2 by the underwater insertion device 3 while being supported by the support roller 4 installed on the sea bottom 8, the contact between the new pipe 1 and the existing pipe 2 is prevented. The insertion resistance can be kept small. (C) As a result, the new pipe 1 can be pushed in with a small insertion force, which facilitates the work. (D) Further, when the insertion device having the same capacity as the conventional one is used, it becomes possible to insert a new pipe into an existing submarine pipe having a longer distance.
【図１】本発明の実施例に係る方法を示す縦断側面図で
ある。FIG. 1 is a vertical sectional side view showing a method according to an embodiment of the present invention.
【図２】本発明の実施例に係る挿込装置を示す斜視図で
ある。FIG. 2 is a perspective view showing an insertion device according to an embodiment of the present invention.
【図３】図１のＡーＡ線拡大断面図である。FIG. 3 is an enlarged sectional view taken along the line AA of FIG.
【図４】従来の方法を実施して既設海底配管内に新管を
挿入している状態を示す縦断側面図である。FIG. 4 is a vertical cross-sectional side view showing a state in which a new pipe is inserted into an existing seabed pipe by performing a conventional method.
【図５】従来の方法を実施して既設海底配管内に新管を
挿入している状態を示す縦断側面図である。FIG. 5 is a vertical sectional side view showing a state in which a new pipe is inserted into an existing seabed pipe by performing a conventional method.
１ 新管 ２ 既設海底配管 ３ 水中挿入装置 ４ 支持ローラー ５ 作業台 ６ ステインガローラー ７ 動力供給線 ８ 海底面 １０ クランプ １１ チャック １２ ジャッキ １３ 挿入装置 １４ シリンダ １５ Ｓ次状部分 1 New Pipe 2 Existing Submarine Pipe 3 Underwater Inserting Device 4 Support Roller 5 Working Table 6 Steiner Roller 7 Power Supply Line 8 Sea Bottom 10 Clamp 11 Chuck 12 Jack 13 Inserting Device 14 Cylinder 15 S Next-Shaped Part
Claims (1)
８における管端部に、海面上にて遠隔操作可能な水中挿
入装置３を設け、海面上の作業台５で接続延長される新
管１を海底面８に設置した支持ローラ−４を介して海底
面８の既設海底配管２の管端部から軸線を合わせて差込
み、前記水中挿入装置３により挿入することを特徴とす
る既設海底配管内に新管を挿入する方法。1. A submerged insertion device 3 that can be remotely controlled on the sea surface is provided at a pipe end of a sea bottom surface 8 of an existing seabed pipe 2 cut on the way, and a connection is extended by a workbench 5 on the sea surface. The existing seabed is characterized in that the pipe 1 is inserted through the support roller-4 installed on the seabed 8 from the pipe end portion of the existing seabed pipe 2 on the seabed 8 so that the pipe 1 is inserted by the underwater insertion device 3. How to insert a new pipe into the pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17044294A JP3410552B2 (en) | 1994-06-30 | 1994-06-30 | How to insert a new pipe into an existing submarine pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17044294A JP3410552B2 (en) | 1994-06-30 | 1994-06-30 | How to insert a new pipe into an existing submarine pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0814441A true JPH0814441A (en) | 1996-01-16 |
| JP3410552B2 JP3410552B2 (en) | 2003-05-26 |
Family
ID=15905004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17044294A Expired - Fee Related JP3410552B2 (en) | 1994-06-30 | 1994-06-30 | How to insert a new pipe into an existing submarine pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3410552B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2021131096A (en) * | 2020-02-18 | 2021-09-09 | 日鉄エンジニアリング株式会社 | Existing pipe renewal method |
| CN117403756A (en) * | 2023-10-24 | 2024-01-16 | 中交第三航务工程局有限公司 | A method for launching pipeline segments forming sea discharge pipes |
-
1994
- 1994-06-30 JP JP17044294A patent/JP3410552B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2021131096A (en) * | 2020-02-18 | 2021-09-09 | 日鉄エンジニアリング株式会社 | Existing pipe renewal method |
| CN117403756A (en) * | 2023-10-24 | 2024-01-16 | 中交第三航务工程局有限公司 | A method for launching pipeline segments forming sea discharge pipes |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3410552B2 (en) | 2003-05-26 |
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