JP2004166434A - Method and apparatus for attaching protective tube to long body to be laid on seabed - Google Patents

Method and apparatus for attaching protective tube to long body to be laid on seabed Download PDF

Info

Publication number
JP2004166434A
JP2004166434A JP2002331322A JP2002331322A JP2004166434A JP 2004166434 A JP2004166434 A JP 2004166434A JP 2002331322 A JP2002331322 A JP 2002331322A JP 2002331322 A JP2002331322 A JP 2002331322A JP 2004166434 A JP2004166434 A JP 2004166434A
Authority
JP
Japan
Prior art keywords
barge
long body
sea
long
protection
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
JP2002331322A
Other languages
Japanese (ja)
Inventor
Tomotsune Iso
友恒 磯
Yukio Kajitani
幸夫 梶谷
Shinji Fujishima
真司 藤嶋
Jiro Okubo
次郎 大久保
Tadato Yamamori
唯人 山森
Minoru Obayashi
実 大林
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.)
日本サルヴ▲ヱ▼ージ株式会社
Nippon Salvage Co Ltd
Original Assignee
日本サルヴ▲ヱ▼ージ株式会社
Nippon Salvage Co 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 日本サルヴ▲ヱ▼ージ株式会社, Nippon Salvage Co Ltd filed Critical 日本サルヴ▲ヱ▼ージ株式会社
Priority to JP2002331322A priority Critical patent/JP2004166434A/en
Publication of JP2004166434A publication Critical patent/JP2004166434A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02GINSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G1/00Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
    • H02G1/06Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for laying cables, e.g. laying apparatus on vehicle
    • H02G1/10Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for laying cables, e.g. laying apparatus on vehicle in or under water
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02GINSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G9/00Installations of electric cables or lines in or on the ground or water
    • H02G9/06Installations of electric cables or lines in or on the ground or water in underground tubes or conduits; Tubes or conduits therefor

Landscapes

  • Electric Cable Installation (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and an apparatus for attaching a protective tube to a long body to be laid on the seabed, wherein the protective tube can be attached easily to a long body on a cable laying barge-type platform, and by only attaching the long body with the protective tube attached only has to be reeled out into the sea and need not be buried under the seabed. <P>SOLUTION: The barge-type platform is floated on the sea and is controlled by a piloting support system equipped with a global positioning system. The barge-type platform is provided thereon aft with a long body housing apparatus which houses coiled long bodies 70, such as cables and pipes, and a chute which reels the long body 70, reeled out of the long body housing apparatus, out into the sea aft of the platform. A plurality of half protective tubes 64 are spliced and positioned under the long body 70 held at a predetermined height on the platform. The half protective tubes 65 are attached individually and successively to the protective tubes 64 from above and they are jointed integrally. After a predetermined length of the half protective tubes 64 and 65 is attached to the long body 70 on the barge-type platform, the hull is controlled and moved forward by the piloting support system by a distance equivalent to the predetermined length of the spliced and attached protective tubes, thereby laying the long bodies on the seabed. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
主として海底(水底)に布設する電力、通信等の各種ケーブルや送水管、オイルパイプ等のパイプ類等の長尺体を、岩盤等の外部の障害から防護するための防護管を被着するための被着方法および装置に関するものである。
【0002】
【従来の技術】
従来、電力、通信等の各種ケーブルや送水管、オイルパイプ等の各種パイプ類等の長尺体を海底、水底に布設する長尺体布設台船は公知である。長尺体布設台船は、所望の面積のほぼ平坦な上面を有した喫水が浅い構造であり、台船の上面にはケーブルや送水管、オイルパイプ等の各種パイプ類等の長尺体をコイル状に巻回して収容する長尺体収容装置と、該長尺体を海中に繰り出す長尺体繰出装置が配設されている。
【0003】
長尺体布設台船は、長尺体布設作業と同時に海底に布設した長尺体に対して、例えば海中で船の錨等に接触して損傷することを防止するために、長尺体を海底に埋設したり、長尺体に防護管を被着させたりする。
【0004】
従来このような布設作業台船においてケーブルを保護する海底ケーブルの布設方法には、特開2000−308228号公報に開示されているように、台船上においてケーブルにフレキシブルパイプをはめ込んで、そのまま海底へ繰り出し布設する方法が採られている。
【0005】
【特許文献1】
特開2000−308228号公報(第1−3頁、第1図)
【0006】
【発明が解決しようとする課題】
しかしながら、このような方法では送水管等の比較的外径の大きい長尺体においては、その長尺体に被着する防護管はさらにその内径が大きくなるので、その半割状態にある半割防護管でもそれに共って重くなってくるので、比較的軽量のフレキシブルパイプとは違って台船上では防護作業をすることができなかった。
【0007】
そこで図6に示したように、かかる係留地点の海中に数点のアンカー(51)を打設し、その打設したアンカー(51)と台船(1)とをワイヤーロープ(52)によって、係留させてから、台船(1)上に設置してある長尺体をコイル取りしたパンまたはコンテナと呼ばれる容器に長尺体をコイル状に巻いて収容した長尺体パン(12)から長尺体(53)を繰り出しその繰り出した長尺体(53)に対して防護管(54)を一つ一つ潜水夫(55)が海底で被着作業をしていた。
【0008】
このような作業方法では、アンカーの打設および係留のために、非常に多くの時間と労力および多大な費用を必要としていた。特に、海底ケーブルの陸揚げ地点の潮流が激しく、あるいは、海苔網、かき養殖筏、岩石等の障害物が係留地点のすぐ近くにある場合には、そこにアンカーを打設することができないために、アンカーによる布設台船の係留は不可能となってしまう。そのため、布設ルートを変更するか、または養殖筏等を撤去するか、撤去されるまでその工事を延期する必要性があった。従って、布設台船の係留は係留地点の周囲の状況に左右されず容易に短時間に行うことができ、且ついつでも台船上で布設可能にすることが望まれていた。
【0009】
そこで、本発明の目的は、布設台船上で容易に長尺体に防護管を被着する作業が行え、被着後は長尺体を海中に繰り出してやるだけで、海底に埋設しなくとも良い海底布設長尺体防護管の被着方法および装置を提供することにある。
【0010】
【課題を解決するための手段】
上記問題を解決するためにこの発明が採った手段は、海上に浮揚し、地球位置測位システムを有した操船支援装置で制御される台船であって、該台船上にはケーブル、パイプ等の長尺体をコイル状に収容する長尺体収容装置と、該長尺体収容装置から繰り出された長尺体を、後方海中に繰り出す滑台とを船尾に備え、前記台船上において所定の高さ位置に保持された長尺体の下側に複数の半割防護管を連接して位置づけ、上方から半割防護管を個々に且つ順次被覆して一体に接合し、所定長の半割防護管を台船上において長尺体に装着した後、該連接被覆した所定長分の距離を前記操船支援装置により船体を前進させつつ制御して海底に布設するようにしたことを特徴とする。
【0011】
そして、前記台船は、その舷側から船外に延出し海中に向かって垂直方向に旋回自在なアームと該アームの先端に取付られ任意の方向の転回自在なプロペラとを備えるスラスタ装置を台船の両舷側に少なくとも二つ前後に間隔をおいて配置し、該スラスタを前記操船支援装置により個別に制御して操船されるようになっていることを特徴とする。
【0012】
そして、前記半割防護管の内側を上向きにし、予め一方向に複数連接して受台の上に配置し、該受台を前記長尺体の下方より上昇させて連接した半割防護管を該長尺体に当接させ、その長尺体の上からそれぞれ個々に半割防護管を被着していくことを特徴とする。
【0013】
そして、長尺体の下に沿って設けられ、複数個の防護管を縦方向に配置することができる幅と長さを有した受台に、該受台の下から持ち上げる上昇機構を備えた装置を搭載していることを特徴とする。
【0014】
【発明の実施の形態】
この発明の好ましい実施の形態を、以下に詳細に説明する。この海底布設長尺体防護管の被着方法は、海上に浮揚し、地球位置測位システムを有した操船支援装置で制御される台船であって、該台船上にはケーブル、パイプ等の長尺体をコイル状に収容する長尺体収容装置と、該長尺体収容装置から繰り出された長尺体を、後方海中に繰り出す滑台とを船尾に備え、前記台船上において所定の高さ位置に保持された長尺体の下側に複数の半割防護管を連接して位置づけ、上方から半割防護管を個々に且つ順次被覆して一体に接合し、所定長の半割防護管を台船上において長尺体に装着した後、該連接被覆した所定長分の距離を前記操船支援装置により船体を前進させつつ制御して海底に布設するようになっている。
【0015】
また、前記台船は、その舷側から船外に延出し海中に向かって垂直方向に旋回自在なアームと該アームの先端に取付られ任意の方向の転回自在なプロペラとを備えるスラスタ装置を台船の両舷側に少なくとも二つ前後に間隔をおいて配置し、該スラスタ装置を前記操船支援装置により個別に制御して操船されるようになっている。
【0016】
また、前記半割防護管の内側を上向きにし、予め一方向に複数連接して受台の上に配置し、該受台を前記長尺体の下方より上昇させて連接した半割防護管を該長尺体に当接させ、その長尺体の上からそれぞれ個々に半割防護管を被着していくようになっている。
【0017】
また、前記長尺体の下に沿って設けられ、複数個の防護管を縦方向に配置することができる幅と長さを有した受台に、該受台の下から持ち上げる上昇機構を備えているようになっている。
【0018】
【実施例】
以下、発明の一実施例について、図面を参照して説明すると、図1は本発明である台船上において防護管を長尺体に被着する方法を説明した正面図であり、図2は図1の状態を側面から見た図である。そして、図3は本発明である台船上において防護管を長尺体に被着する方法を説明した説明図であり、図4は本発明の台船上面に収納したスラスタ装置を海面の上方向へ90度回転させる状態を説明した図である。また、図5は本発明のスラスタ装置を台船の側部から降ろし海中に浸した状態から海面上方向へ持ち上げた動作を説明した図である。
【0019】
図2において、具体的には、(61)は本発明である長尺体(70)に鋳造等で形成された一つ当たり、約50センチメートル長の防護管(A)、(B)、(C)、〜(H)を被着する装置を布設台船上に設置した長さ約5メートル、幅約70センチメートル長からなる長方形状の台である。そして、図2に示したように、被着された長尺体(73)は布設台船の船尾に設置された滑台(75)から船外海中へ繰り出されることになる。
【0020】
次に、上述したように長尺体(70)に防護管(A)、(B)、(C)、〜(H)を連接被着し海中へ繰り出して行く方法を図1〜図3を参照しながら以下詳細に説明する。
【0021】
まず、図に示したように、長尺体(70)は滑台(75)の高さ位置に保持される。そして、その長尺体(70)の下側には、受台(63)の上に内側を上方に向けて複数の半割防護管(a1)、(b1)、(c1)〜(h1)をそれぞれ縦方向に組合せるように連接して設置し、その設置が完了しだい図1に示したように半割防護管(64)を載置した受台(63)は、その下に配置したリフター(62)を操作することで持ち上げられ、受台(63)および半割防護管(64)はそれぞれ(63’)、(64’)の位置まで上昇移動して長尺体(70)に当接される。
【0022】
そして、次に柱(5)で支えられて架台(6)の下に取付られたリフト架台(7)には、フリークレーン(8)が取付設置されており、このフリークレーン(8)よって上方から運ばれてきた内側を下方に向けた半割防護管(65)は、(65’)の位置に移動させて前述した長尺体(70)の下側に配置した半割防護管(a1)、(b1)、(c1)〜(h1)の個々に順次対応させながらこの連接作業を行い、この作業前に被着した中で一番最後に被着されて上/下組にされて置かれた半割防護管(z1)、(z2)からなる防護管(Z)の後ろに続いている長尺体(70)に対して更に被覆して行く。
【0023】
このようにして所定個数並べられた長尺体(70)の下側に配置された半割防護管(z1)に続いて内側を上方に向けて置かれた半割防護管(a1)、(b1)、(c1)〜(h1)に対して、上側から内側を下方に向けた半割防護管(a2)、(b2)、(c2)〜(h2)を被せ所定長被着する。そして、このような一連の被着作業を終えた後に、長尺体(70)に連接被覆した所定長分の距離を前述した操船支援装置により台船を前進させつつ制御して滑台(75)を介して海底に布設する。この作業を同様に繰り返して行う。
【0024】
上述したように長尺体(70)を布設する台船には、長尺体(70)がコイル状に収容されてあり、その操舵室にはコンピュータにて制御されたDGPS(Differential Global Positioning System) 等の人工衛星利用測位システムを採用した操船支援装置が備えられている。そして、その操船支援装置によって台船はその位置が精度高く観測できるシステムになっている。
【0025】
また、この台船にはその両舷側に所定の間隔をおいて少なくとも二個、全部で四個配置され、台船を定置に安定に維持させるためのスラスタ(20)を含むスラスタ装置を備えている。以下にこのスラスタ装置の構造とその動作について図4および図5を用いて説明する。
【0026】
まず、スラスタ装置はこれらの図に示したように、スラスタ(20)と呼ばれる本体からトランザム(29)と呼ばれる長いアームを延出したその先端に水かき用のプロペラ(30)が取付けられている。そして、このプロペラ(30)が取付けられているプロペラヘッド(h)の首部(m)は360度自由自在に転回が可能な構造となっており、そのプロペラ(30)の回転速度およびプロペラヘッド(h)の回転角度を決定する首部(m)の転回方向は、上述した操舵室からコンピュータにて制御されるようになっている。
【0027】
次に、このような構造のスラスタ装置本体であるスラスタ(20)を動作させて台船(1)を制御する方法を説明すると、図4に示したようにスラスタ装置本体のスラスタ(20)は台船(1)上の舷側内側近傍にそれぞれ設置されている。そして、そのスラスタ装置の下には安定的に制御できるようにするために設置台となる旋回ベース(27)が配置されており、その上面には軸(23)が本体装置を軸支として取付られている。そして、フレーム(21)にはこの軸(23)に操作用の旋回ハンドル(28)や旋回減速機(25)を備えた旋回テーブル(24)と、その旋回テーブル(24)に軸(t)を介してトランザム(29)が取付られた構造になっている。そして、またこのフレーム(21)には上述した軸支の軸(23)を中心に台船(1)上で所定の角度でスラスタ装置本体とともに水平方向に旋回して、台船(1)上を移動させることが容易なように下側に車輪(22)がついており、その車輪(22)は旋回ベース(27)の上面に形成された案内レール(31)の上に対応して載るように設置されている。そして、例えば、台船(1)が自然発生波や航路波等により動揺したためによって起こりうる不用意な回転を防止するためにストッパ(26)によって歯止めされ安定的に保持される。
【0028】
このようにトランザム(29)がフレーム(21)を介してスラスタ装置に取付られている状態で、トランザム(29)はフレーム(21)の旋回にともなって案内レール(31)の上を回転することができる。このように旋回するトランザム(29)の動作は、旋回ハンドル(28)を手動で回すことによって行うことができ、さらにその動作は旋回減速機(25)によって一定の速度で行えるように工夫されている。そして、このトランザム(29)の動作角度としては、図4に示したように台船(1)の舷側に対して船外方向に少なくとも90度の動作ができるようになっている。しかし、このトランザム(29)の収納位置はそれぞれ前後舷側近傍に互いに対向させて収納してあるので実際の回転角度は少なくとも180度の動作が可能になっている。
【0029】
次に、図5に示したようにトランザム(29)をフレーム(21)に設けてある軸(t)を中心にして90度に下側方向に折れ曲がる構造およびその動作を説明すると、まず、この作動は図示しない油圧ポンプによって油圧シリンダ(32)に加圧動作させることによって行うことができ、台船(1)の舷側に対して船外90度の位置で、且つ水平方向に延出させたトランザム(29)は、その位置から少なくとも下側に90度に折れ曲がるような作動ができるようになっている。
【0030】
次に、このように左右および上下に回転自在に動くプロペラ(30)を先端に取付け、トランザム(29)を具備したスラスタ(20)からなるスラスタ装置を、前後両舷側に少なくとも二つ前後に間隔をおいて配置した台船(1)について、その動作を以下に説明する。
【0031】
まず、台船(1)がタグボートよって作業現場に到着し、その作業のために台船(1)を定置に係留させたい場合は、スラスタ装置であるスラスタ(20)の旋回ハンドル(28)を回すことによって、台船(1)の上面に収納されていたトランザム(29)をゆっくりと収納されていた位置から舷側から船外方向に90度回転させる。そして、次に、図示しない油圧ポンプを動作させて油圧シリンダ(32)を加圧することによって、今度はトランザム(29)をゆっくりと下方向つまり海面方向に90度回転させ、その先端のプロペラ(30)を海中に没するようにする。同様にこの作業をそれぞれに配置されているスラスタ装置に対して行う。
【0032】
そして、この状態で前述した操舵室から各プロペラ(30)の回転数およびプロペラヘッド(h)の方向を首部(m)に対してコンピュータ制御を行うようになっている。さらに、これらの制御はDGPS等からの位置情報を基にして常にその精度が保たれるように設定されている。つまり、各スラスタ装置の制御は全て自動化され台船(1)がその係留ポイントから外れた場合においては、直ちに上述したコンピュータ制御が行われて常に位置補正が行われるようになっている。
【0033】
つまり、長尺体(70)に防護管(A)、(B)、(C)〜(H)を被着した所定長の距離ずつ即座に台船を前進移動させることができるので、その作業に必要な移動距離分に対し、その係留ポイントから作業に合わせた所定長の距離を前進する移動先地点のデータをコンピュータに指示するだけで良い。つまり、コンピュータはDGPSから受けている位置情報と指示された移動先地点の位置情報とを比較し、コンピュータは各スラスタ装置に対してその移動先地点までの位置補正分の制御信号を送り直ちに制御を行うことができるようにしている。
【0034】
このように、本発明のスラスタ装置からなるスラスタ(20)を使用することで、従来は不可能とされていた台船自身で定置に係留することができるようになる。
【0035】
次に、台船(1)での作業が終了しタグボートに曳かれる場合においては、まず、図5に示したように油圧シリンダ(32)を動作させてトランザム(29)を少なくとも海面から90度回転させて持ち上げてから、今度は、旋回ハンドル(28)を手動で回してトランザム(29)を少なくとも90度水平方向に回転させて台船(1)の上に引き込み収納する。そして、このトランザム(29)の収納後にトランザム(29)の不用意な回転を防止するためにストッパ(26)で歯止めをしておく。そのようにしてトランザム(29)を台船(1)の上に引き込み収納することで、タグボートに曳かれ移動する場合においては、航行抵抗が減るのでスピードを上げて航行することが可能となる。
【0036】
なお、この一実施例では旋回ハンドル(28)は手動で回していたが、これらの操作は手動に限るものではなく、電動モータ等の動力を用いて操作させるようにしても良い。
【0037】
【発明の効果】
以上説明してきたように、本発明の海底布設長尺体防護管の被着方法によれば、その構成を海上に浮揚し、地球位置測位システムを有した操船支援装置で制御される台船であって、該台船上にはケーブル、パイプ等の長尺体をコイル状に収容する長尺体収容装置と、該長尺体収容装置から繰り出された長尺体を、後方海中に繰り出す滑台とを船尾に備え、前記台船上において所定の高さ位置に保持された長尺体の下側に複数の半割防護管を連接して位置づけ、上方から半割防護管を個々に且つ順次被覆して一体に接合し、所定長の半割防護管を台船上において長尺体に装着した後、該連接被覆した所定長分の距離を前記操船支援装置により船体を前進させつつ制御して海底に布設するようにしたため、所定長の長尺体に対して防護管を短時間で装着することができ、その布設作業距離はその所定長の長尺単位ずつの距離で行うことができるので、布設作業時間が短縮されその分の費用が削減できるという効果が得られる。
【0038】
また、前記台船は、その舷側から船外に延出し海中に向かって垂直方向に旋回自在なアームと該アームの先端に取付られ任意の方向の転回自在なプロペラとを備えるスラスタ装置を台船の両舷側に少なくとも二つ前後に間隔をおいて配置し、該スラスタ装置を前記操船支援装置により個別に制御して操船されるようになっているため、例えば、長尺体の布設作業毎に台船をアンカーによる定点保持をさせる必要がないので、長尺体に防護管を被着した所定長の距離ずつ即座に台船を前進移動させることができるという効果が得られる。
【0039】
また、前記半割防護管の内側を上向きにし、予め一方向に複数連接して受台の上に配置し、該受台を前記長尺体の下方より上昇させて連接した半割防護管を該長尺体に当接させ、その長尺体の上からそれぞれ個々に半割防護管を被着していくようにしたため、下側に配置した半割防護管に対応して組になる半割防護管を上から安定して被せることができ、更に各上/下組になった半割防護管個々に対して複数個のボルト締めで容易に一体に接合することができるという効果が得られる。
【0040】
また、長尺体の下に沿って設けられ、複数個の防護管を縦方向に配置することができる幅と長さを有した受台に、該受台の下から持ち上げる上昇機構を備えたため、長尺体の下側にそれぞれ安定的に連接した状態で複数個の半割防護管を配置させて置くことができ、その連接状態に配置された半割防護管に対応して、組になる半割防護管を上から順次被せることができるので作業時間の短縮が図れるという効果が得られる。
【図面の簡単な説明】
【図1】本発明である台船上において防護管を長尺体に被着する方法を説明した正面図である。
【図2】図1の状態を側面から見た図である。
【図3】本発明である台船上において防護管を長尺体に被着する方法を説明した説明図である。
【図4】本発明の台船上面に収納したスラスタ装置を海面の上方向へ90度回転させる状態を説明する図である。
【図5】本発明のスラスタ装置を台船の側部から降ろし海中に没した状態から海面上方向へ持ち上げた動作を説明した図である。
【図6】従来の防護管の被着方法を説明した概念図である。
【符号の説明】
(1) 台船
(5) 柱
(6) 架台
(7) リフト架台
(8) フリークレーン
(53) ケーブル
(61) 台
(62) リフター
(63) 受台
(64) 防護管(下側用)
(65) 防護管(上側用)
(70) 長尺体
(73) 布設された長尺体
(75) 滑台
[0001]
TECHNICAL FIELD OF THE INVENTION
To attach a protective pipe to protect long cables such as electric power and communication cables, water pipes, oil pipes and other pipes mainly laid on the sea floor (water bottom) from external obstacles such as rock. And a method and an apparatus for applying the same.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a long laying barge that lays a long body such as various cables such as electric power and communication, a water pipe, and various pipes such as an oil pipe on a seabed or a water bottom is known. The long body laying barge has a shallow draft structure with a substantially flat upper surface of a desired area, and a long body such as cables, water pipes, oil pipes, and other various pipes is provided on the upper surface of the barge. A long body housing device that is wound and housed in a coil shape and a long body feeding device that feeds the long body into the sea are provided.
[0003]
The long body laying barge is designed to prevent the long body laid on the sea floor at the same time as the long body laying work from being damaged by, for example, contacting the ship's anchor or the like in the sea. It is buried on the seabed or a protective tube is attached to a long body.
[0004]
Conventionally, a method of laying a submarine cable for protecting a cable in such a laying work boat is disclosed in Japanese Patent Application Laid-Open No. 2000-308228. A method of laying out is adopted.
[0005]
[Patent Document 1]
JP-A-2000-308228 (pages 1-3, FIG. 1)
[0006]
[Problems to be solved by the invention]
However, in such a method, in the case of a long body having a relatively large outer diameter, such as a water pipe, the inner diameter of the protective tube attached to the long body is further increased, so that the half of the protection pipe is in the half state. Since the protective pipe also became heavier, it was not possible to perform protective work on the barge unlike a relatively lightweight flexible pipe.
[0007]
Therefore, as shown in FIG. 6, several anchors (51) are installed in the sea at the mooring point, and the installed anchor (51) and the barge (1) are connected by a wire rope (52). After being moored, the long body is coiled into a container called a container or a container called a container in which the long body installed on the barge (1) is coiled, and the long body is wound from the long body pan (12). The diver (53) was fed out, and the diver (55) was working on the seafloor one by one with a protective tube (54) on the fed-out elongated body (53).
[0008]
Such a method of operation required a great deal of time, labor and expense for anchoring and mooring. In particular, when the tidal current at the landing point of the submarine cable is strong, or when there are obstacles such as laver nets, oyster culture rafts, rocks, etc., anchors cannot be installed there. However, mooring of the laying barge by the anchor becomes impossible. Therefore, it was necessary to change the laying route, remove the culture raft, etc., or postpone the construction until it was removed. Therefore, it has been desired that the mooring of the laying barge can be easily performed in a short time without being influenced by the situation around the mooring point, and that the laying barge can be laid on the barge at any time.
[0009]
Therefore, an object of the present invention is to perform an operation of easily attaching a protective tube to a long body on a laying barge, and after the attachment, the long body is simply pulled out into the sea without having to be buried on the seabed. It is an object of the present invention to provide a method and an apparatus for attaching a long protective pipe for submarine laying.
[0010]
[Means for Solving the Problems]
Means adopted by the present invention to solve the above problem is a barge that floats on the sea and is controlled by a ship maneuvering support device having a global positioning system. An elongate body accommodating device for accommodating the elongate body in a coil shape, and a slide for advancing the elongate body unreeled from the elongate object accommodating device into the rear sea are provided at the stern, and a predetermined height is set on the barge. A plurality of half-protection pipes are connected and positioned below the long body held at the vertical position, and the half-protection pipes are individually and sequentially covered from above and integrally joined to form a half-length protection pipe having a predetermined length. After the pipe is attached to the elongate body on the barge, the distance for the predetermined length covered by the connection is controlled by moving the hull forward by the marine vessel maneuvering assist device and laid on the seabed.
[0011]
The barge includes a thruster device including an arm extending outboard from the side of the ship and vertically swingable toward the sea, and a propeller attached to a tip of the arm and rotatable in any direction. The thrusters are individually controlled by the marine vessel maneuvering assist device so as to be maneuvered on both sides of the ship.
[0012]
Then, the inside of the half protection pipe is directed upward, and a plurality of the protection pipes are connected in advance in one direction and placed on the receiving stand, and the receiving base is raised from below the elongated body to connect the half protection pipe. It is characterized in that it is brought into contact with the elongated body, and a half-protection pipe is individually applied from above the elongated body.
[0013]
And a pedestal provided along the elongated body and having a width and a length capable of vertically arranging a plurality of protective tubes is provided with a lifting mechanism for lifting the pedestal from below the pedestal. It is characterized in that the device is mounted.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Preferred embodiments of the present invention will be described in detail below. The method of attaching the long-body protection pipe laid on the seabed is a barge that floats on the sea and is controlled by a ship maneuvering support device having a global positioning system. An elongate body accommodating device for accommodating the elongate body in a coil shape, and a slide for advancing the elongate body unwound from the elongate object accommodating device into the rear sea are provided at the stern, and a predetermined height on the barge A plurality of half-protection pipes are connected and positioned below the long body held at the position, and the half-protection pipes are individually and sequentially covered from above and joined together to form a half-length protection pipe of a predetermined length. After being mounted on a long body on a barge, the distance covered by the predetermined length covered by the connection is controlled by moving the hull forward by the marine vessel maneuvering assist device and laid on the seabed.
[0015]
In addition, the barge includes a thruster device including an arm extending outboard from the side of the ship and vertically rotatable toward the sea, and a propeller attached to a tip of the arm and rotatable in any direction. The thruster devices are individually controlled by the marine vessel maneuvering assist device so that the marine vessel can be maneuvered.
[0016]
Further, the inside of the half-protection pipe faces upward, a plurality of the protection pipes are connected in advance in one direction and arranged on the receiving table, and the receiving table is raised from below the elongated body to connect the half-protection pipe. The half-length body is brought into contact with each other, and a half-protection pipe is individually applied from above the long body.
[0017]
Further, a pedestal provided along the elongated body and having a width and a length in which a plurality of protective tubes can be arranged in a vertical direction is provided with a lifting mechanism for lifting the pedestal from below the pedestal. It has become.
[0018]
【Example】
An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view illustrating a method of attaching a protective tube to a long body on a barge according to the present invention, and FIG. FIG. 2 is a diagram of the state of No. 1 as viewed from the side. FIG. 3 is an explanatory view illustrating a method of attaching a protective tube to a long body on a barge according to the present invention, and FIG. It is a figure explaining the state rotated 90 degrees to. FIG. 5 is a view for explaining an operation of lowering the thruster device of the present invention from the side of the barge and lifting the thruster device upward from the state of being immersed in the sea.
[0019]
In FIG. 2, specifically, (61) is a protective tube (A), (B), which is about 50 cm long formed by casting or the like on the long body (70) of the present invention. (C) It is a rectangular base having a length of about 5 meters and a width of about 70 centimeters on which a device for applying (H) is installed on a laying barge. Then, as shown in FIG. 2, the attached long body (73) is fed out of the outboard sea from the slide (75) installed at the stern of the laid barge.
[0020]
Next, as described above, a method for connecting and attaching the protective tubes (A), (B), (C), and (H) to the elongated body (70) and feeding the same into the sea will be described with reference to FIGS. This will be described in detail below with reference to FIG.
[0021]
First, as shown in the figure, the elongated body (70) is held at the height position of the slide (75). A plurality of half-protection tubes (a1), (b1), (c1) to (h1) are provided on the lower side of the elongated body (70) with the inside facing upward on the cradle (63). Are installed so as to be combined in the vertical direction, and upon completion of the installation, the pedestal (63) on which the half protection pipe (64) is placed as shown in FIG. The lifter (62) is lifted by operating the lifter (62), and the pedestal (63) and the half-protection pipe (64) move upward to the positions (63 ') and (64'), respectively, to form the elongated body (70). Be abutted.
[0022]
Next, a free crane (8) is mounted and installed on the lift gantry (7) supported by the column (5) and mounted below the gantry (6). The half-protection pipe (65) with the inside directed downward from the half-protection pipe (a1) is moved to the position (65 ') and arranged below the long body (70). ), (B1), and (c1) to (h1), the connecting work is performed while sequentially corresponding to each of them. The elongated body (70) following the protective tube (Z) consisting of the placed protective tubes (z1) and (z2) is further coated.
[0023]
A half-protection pipe (a1) placed inside facing upward following the half-protection pipe (z1) arranged below the predetermined number of long bodies (70), ( b1), (c1) to (h1) are covered with a half-length protective tube (a2), (b2), (c2) to (h2) with the inside facing downward from the upper side, and are adhered for a predetermined length. Then, after completing such a series of attaching work, the slide (75) is controlled by moving the barge forward by the above-mentioned boat maneuvering assist device to control the distance for a predetermined length continuously connected to the long body (70). ) To be laid on the sea floor. This operation is repeated similarly.
[0024]
As described above, the barge on which the long body (70) is laid houses the long body (70) in a coil shape, and its steering room has a DGPS (Differential Global Positioning System) controlled by a computer. ) Is provided with a ship maneuvering support device that employs a satellite-based positioning system. And the barge is a system which can observe the position of the barge with high accuracy by the ship maneuvering support device.
[0025]
This barge is provided with thrusters including thrusters (20) arranged on both sides of the ship at least two at predetermined intervals and four in total, and for stably maintaining the barge at a fixed position. I have. Hereinafter, the structure and operation of the thruster will be described with reference to FIGS.
[0026]
First, as shown in these figures, the thruster device has a propeller (30) for webbing attached to a tip of a long arm called a transam (29) extending from a main body called a thruster (20). The neck (m) of the propeller head (h) to which the propeller (30) is attached has a structure capable of freely turning 360 degrees, and the rotational speed of the propeller (30) and the propeller head (h). The turning direction of the neck (m) that determines the rotation angle of h) is controlled by a computer from the above-mentioned steering room.
[0027]
Next, a method for controlling the barge (1) by operating the thruster (20), which is the main body of the thruster device having such a structure, will be described. As shown in FIG. The barges (1) are installed in the vicinity of the inner side of the side of the barge, respectively. A swivel base (27) serving as an installation table is disposed below the thruster device so as to enable stable control, and a shaft (23) is mounted on the upper surface of the thruster device with the main body device as a pivotal support. Has been. The frame (21) has a turning table (24) provided with a turning handle (28) for operation and a turning speed reducer (25) on the shaft (23), and a shaft (t) on the turning table (24). , And a transam (29) is attached thereto. Further, the frame (21) pivots horizontally along with the thruster device main body at a predetermined angle on the barge (1) about the shaft (23) of the above-mentioned shaft support, and moves on the barge (1). The wheels (22) are attached to the lower side so that the wheels can be easily moved, and the wheels (22) are correspondingly mounted on guide rails (31) formed on the upper surface of the turning base (27). It is installed in. And, for example, the barge (1) is stopped by a stopper (26) in order to prevent inadvertent rotation that may be caused by the swaying of the barge due to a naturally generated wave or a seaway wave, and is stably held.
[0028]
In the state where the transam (29) is attached to the thruster device via the frame (21), the transam (29) rotates on the guide rail (31) with the turning of the frame (21). Can be. The operation of the transom (29) that turns in this manner can be performed by manually turning the turning handle (28), and the operation is designed so that the operation can be performed at a constant speed by the turning speed reducer (25). I have. As for the operation angle of the transam (29), as shown in FIG. 4, the operation can be performed at least 90 degrees in the outboard direction with respect to the side of the barge (1). However, since the storage positions of the transams (29) are stored in the vicinity of the front and rear sides so as to be opposed to each other, the operation at an actual rotation angle of at least 180 degrees is possible.
[0029]
Next, as shown in FIG. 5, a structure in which the transom (29) is bent downward by 90 degrees about an axis (t) provided on the frame (21) and its operation will be described. The operation can be performed by pressurizing a hydraulic cylinder (32) by a hydraulic pump (not shown). The hydraulic cylinder (32) extends horizontally at a position 90 ° outboard with respect to the side of the barge (1). The transam (29) can be operated to bend at least 90 degrees downward from its position.
[0030]
Next, the propeller (30) rotatably moving left and right and up and down as described above is attached to the tip, and a thruster device including a thruster (20) equipped with a transam (29) is spaced at least two back and forth sides on both sides. The operation of the barge (1) arranged in the following manner will be described below.
[0031]
First, when the barge (1) arrives at the work site by the tugboat and it is desired to moor the barge (1) for the work, the turning handle (28) of the thruster (20), which is a thruster device, is used. By turning, the transam (29) housed on the upper surface of the barge (1) is slowly rotated 90 degrees outward from the side of the boat from the housed position. Then, by operating a hydraulic pump (not shown) to pressurize the hydraulic cylinder (32), this time, the transam (29) is rotated slowly downward, that is, 90 degrees in the sea level direction, and the propeller (30 ) To sink into the sea. Similarly, this operation is performed for the thrusters arranged respectively.
[0032]
In this state, the rotation speed of each propeller (30) and the direction of the propeller head (h) are controlled by the computer from the steering room to the neck (m). Further, these controls are set based on position information from DGPS or the like so that the accuracy is always maintained. That is, the control of each thruster device is fully automated, and when the barge (1) deviates from its mooring point, the above-described computer control is immediately performed and the position correction is always performed.
[0033]
In other words, the barge can be immediately moved forward by a predetermined distance with the protective tubes (A), (B), (C) to (H) attached to the long body (70). It is only necessary to instruct the computer of the data of the destination point which moves forward from the mooring point by a predetermined distance corresponding to the work for the moving distance required for the computer. In other words, the computer compares the position information received from the DGPS with the position information of the designated destination point, and the computer sends a control signal for the position correction to the destination point to each thruster device and immediately controls the thruster. So that you can do it.
[0034]
As described above, by using the thruster (20) including the thruster device of the present invention, the barge can be moored at a fixed position by the barge itself, which has been impossible in the past.
[0035]
Next, when the work on the barge (1) is completed and the tugboat is towed, first, as shown in FIG. 5, the hydraulic cylinder (32) is operated to move the transam (29) at least 90 degrees from the sea surface. After being rotated and lifted, this time, the turning handle (28) is manually turned to rotate the transam (29) horizontally by at least 90 degrees to be retracted and stored on the barge (1). Then, after the trans-am (29) is stored, the trans-am (29) is stopped by a stopper (26) in order to prevent inadvertent rotation of the trans-am (29). By pulling and storing the transam (29) on the barge (1) in this manner, in the case where the transam (29) is towed and moved by the tug boat, the navigation resistance is reduced, so that it is possible to increase the speed and sail.
[0036]
In this embodiment, the turning handle (28) is manually turned. However, these operations are not limited to manual operation, and may be operated using power of an electric motor or the like.
[0037]
【The invention's effect】
As described above, according to the method for attaching a long-body protection pipe laid on the seabed according to the present invention, the structure is floated on the sea, and the barge controlled by the ship maneuvering support device having the global positioning system is used. There is a long body housing device for housing long bodies such as cables and pipes in a coil shape on the barge, and a slide for feeding the long body drawn out from the long body housing device into the back sea. Are provided at the stern, and a plurality of half protective tubes are connected and positioned below the long body held at a predetermined height position on the barge, and the half protective tubes are individually and sequentially covered from above. Then, a half-length protective pipe of a predetermined length is attached to a long body on a barge, and then the distance for the predetermined length covered by the connection is controlled by advancing the hull by the marine vessel maneuvering assist device, thereby controlling the seabed. Protective tube for a predetermined length of long body Can be mounted, the laying work distance can be performed at a distance of each elongate unit of the predetermined length, the effect of laying work time is shortened can be reduced by that amount of costs can be obtained.
[0038]
Further, the barge includes a thruster device including an arm extending outboard from the side of the ship and capable of turning vertically in the sea and a propeller attached to a tip of the arm and rotatable in an arbitrary direction. The thrusters are arranged at least two in front and rear on both sides of the ship, and the thrusters are individually controlled by the ship maneuvering assist device so that the ship can be maneuvered. Since it is not necessary to hold the barge at a fixed point by the anchor, an effect is obtained that the barge can be immediately moved forward by a predetermined length with the protection pipe attached to the long body.
[0039]
Further, the inside of the half-protection pipe faces upward, a plurality of the protection pipes are connected in advance in one direction and arranged on the receiving table, and the receiving table is raised from below the elongated body to connect the half-protection pipe. Since the half-length protection tubes are brought into contact with the long-length body and the half-length protection tubes are individually applied from above the long-length body, the half-height protection tubes corresponding to the half-length protection tubes arranged on the lower side are formed. The split protective tube can be stably covered from above, and the effect of being able to be easily and integrally joined to each of the upper and lower half-protective tubes individually by tightening a plurality of bolts is obtained. Can be
[0040]
In addition, a pedestal provided along the long body and having a width and length capable of vertically arranging a plurality of protective tubes is provided with a lifting mechanism for lifting the pedestal from under the pedestal. A plurality of half-protection pipes can be arranged and stably connected to the lower side of the elongate body, respectively. Since the half-protection pipes can be sequentially covered from the top, the effect of shortening the working time can be obtained.
[Brief description of the drawings]
FIG. 1 is a front view illustrating a method for attaching a protective tube to a long body on a barge according to the present invention.
FIG. 2 is a side view of the state of FIG. 1;
FIG. 3 is an explanatory view illustrating a method of attaching a protective tube to a long body on a barge according to the present invention.
FIG. 4 is a view illustrating a state in which the thruster device housed on the upper surface of the barge of the present invention is rotated 90 degrees in the upward direction on the sea surface.
FIG. 5 is a view for explaining an operation of lowering the thruster device of the present invention from the side of the barge and lifting the thruster upward from the state of being submerged in the sea.
FIG. 6 is a conceptual diagram illustrating a conventional method of attaching a protective tube.
[Explanation of symbols]
(1) Barge (5) Pillar (6) Stand (7) Lift stand (8) Free crane (53) Cable (61) Stand (62) Lifter (63) Receiving stand (64) Protective tube (for lower side)
(65) Protection tube (for upper side)
(70) Long body (73) Long body laid (75) Slide

Claims (4)

海上に浮揚し、地球位置測位システムを有した操船支援装置で制御される台船であって、該台船上にはケーブル、パイプ等の長尺体をコイル状に収容する長尺体収容装置と、該長尺体収容装置から繰り出された長尺体を、後方海中に繰り出す滑台とを船尾に備え、前記台船上において所定の高さ位置に保持された長尺体の下側に複数の半割防護管を連接して位置づけ、上方から半割防護管を個々に且つ順次被覆して一体に接合し、所定長の半割防護管を台船上において長尺体に装着した後、該連接被覆した所定長分の距離を前記操船支援装置により船体を前進させつつ制御して海底に布設するようにしたことを特徴とする海底布設長尺体防護管の被着方法。A barge floating on the sea and controlled by a ship maneuvering support device having a global positioning system, comprising a long body housing device for housing a long body such as a cable or a pipe in a coil shape on the barge. An elongate body fed out from the elongate body housing device, a slide to be fed back into the sea is provided at the stern, and a plurality of elongate bodies held at a predetermined height position on the barge are provided below the elongate body. The half-protection pipes are connected and positioned, and the half-protection pipes are individually and sequentially covered from above and joined together, and after attaching a half-length protection pipe of a predetermined length to a long body on a barge, the connection is performed. A method for attaching a submarine laid long body protection pipe, wherein the covered distance is controlled while moving the hull forward by the marine vessel maneuvering support device and laid on the seabed. 前記台船は、その舷側から船外に延出し海中に向かって垂直方向に旋回自在なアームと該アームの先端に取付られ任意の方向の転回自在なプロペラとを備えるスラスタ装置を台船の両舷側に少なくとも二つ前後に間隔をおいて配置し、該スラスタ装置を前記操船支援装置により個別に制御して操船されるようになっていることを特徴とする請求項1記載の海底布設長尺体防護管の被着方法。The barge is equipped with a thruster device including an arm extending outboard from the side of the ship and vertically rotatable toward the sea and a propeller attached to a tip of the arm and rotatable in any direction. 2. The submarine laying elongate according to claim 1, wherein the thrusters are individually controlled by the marine vessel maneuvering support device so that the marine vessel is maneuvered at least at two places on the side of the ship. How to attach the body protection tube. 前記半割防護管の内側を上向きにし、予め一方向に複数連接して受台の上に配置し、該受台を前記長尺体の下方より上昇させて連接した半割防護管を該長尺体に当接させ、その長尺体の上からそれぞれ個々に半割防護管を被着していくことを特徴とする請求項1記載の海底布設長尺体防護管の被着方法。With the inside of the half-protection pipe facing upward, a plurality of the protection pipes are connected in advance in one direction and placed on a receiving table, and the receiving table is raised from below the elongated body to connect the half-protecting pipe connected to the length. 2. The method according to claim 1, wherein the protection pipes are attached to the long body, and the half protection pipes are individually applied from above the long body. 前記長尺体の下に沿って設けられ、複数個の防護管を縦方向に配置することができる幅と長さを有した受台に、該受台の下から持ち上げる上昇機構を備えたことを特徴とする海底布設長尺体防護管の被着装置A pedestal provided along the elongated body and having a width and length capable of vertically arranging a plurality of protective tubes is provided with a lifting mechanism for lifting the pedestal from below the pedestal. Apparatus for attaching submarine-installed long body protective pipe
JP2002331322A 2002-11-14 2002-11-14 Method and apparatus for attaching protective tube to long body to be laid on seabed Pending JP2004166434A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002331322A JP2004166434A (en) 2002-11-14 2002-11-14 Method and apparatus for attaching protective tube to long body to be laid on seabed

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002331322A JP2004166434A (en) 2002-11-14 2002-11-14 Method and apparatus for attaching protective tube to long body to be laid on seabed

Publications (1)

Publication Number Publication Date
JP2004166434A true JP2004166434A (en) 2004-06-10

Family

ID=32808745

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2002331322A Pending JP2004166434A (en) 2002-11-14 2002-11-14 Method and apparatus for attaching protective tube to long body to be laid on seabed

Country Status (1)

Country Link
JP (1) JP2004166434A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009136834A1 (en) * 2008-05-06 2009-11-12 Helgesson Bjoern Concrete element for protecting an underwater installation
KR101149590B1 (en) 2010-09-20 2012-05-29 권길중 Protective cover for submarine coupling method and protective cover thereof
JP2015042115A (en) * 2013-08-23 2015-03-02 株式会社ジェイ・パワーシステムズ Support base, marine cable construction system, marine cable construction method and construction ship
EP3073170A1 (en) * 2015-03-23 2016-09-28 IOS InterMoor AS Protection of sub-surface ropes
JP2017135980A (en) * 2017-04-10 2017-08-03 住友電気工業株式会社 Marine cable construction system, marine cable construction method, and construction ship
EP3290763A1 (en) * 2016-08-29 2018-03-07 Siemens Aktiengesellschaft Apparatus for jacketing a cable
KR101837115B1 (en) 2017-01-31 2018-03-09 한국해양대학교 산학협력단 Hybrid Protection Block for Buried Submarine Pipelines and Construction method
JP2019041533A (en) * 2017-08-28 2019-03-14 住友電気工業株式会社 Manufacturing method of cable with protective tube, manufacturing system of cable with protective tube, protective tube, and cable with protective tube

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5514382A (en) * 1978-05-05 1980-01-31 Santa Fe Int Corp Self propelling type reeled pipe installing ship
JPS57206211A (en) * 1981-06-03 1982-12-17 Furukawa Electric Co Ltd Method of laying line on submarine bottom
JPH07255113A (en) * 1994-03-11 1995-10-03 Sumitomo Electric Ind Ltd Assembling apparatus for prefabricated connection box for cv cable
JP2001132012A (en) * 1999-11-08 2001-05-15 Fujikura Ltd Position leading device of tremie pipe

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5514382A (en) * 1978-05-05 1980-01-31 Santa Fe Int Corp Self propelling type reeled pipe installing ship
JPS57206211A (en) * 1981-06-03 1982-12-17 Furukawa Electric Co Ltd Method of laying line on submarine bottom
JPH07255113A (en) * 1994-03-11 1995-10-03 Sumitomo Electric Ind Ltd Assembling apparatus for prefabricated connection box for cv cable
JP2001132012A (en) * 1999-11-08 2001-05-15 Fujikura Ltd Position leading device of tremie pipe

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009136834A1 (en) * 2008-05-06 2009-11-12 Helgesson Bjoern Concrete element for protecting an underwater installation
KR101149590B1 (en) 2010-09-20 2012-05-29 권길중 Protective cover for submarine coupling method and protective cover thereof
JP2015042115A (en) * 2013-08-23 2015-03-02 株式会社ジェイ・パワーシステムズ Support base, marine cable construction system, marine cable construction method and construction ship
EP3073170A1 (en) * 2015-03-23 2016-09-28 IOS InterMoor AS Protection of sub-surface ropes
WO2016151044A1 (en) * 2015-03-23 2016-09-29 Ios Intermoor As Protection of fibrous mooring lines
EP3290763A1 (en) * 2016-08-29 2018-03-07 Siemens Aktiengesellschaft Apparatus for jacketing a cable
KR101837115B1 (en) 2017-01-31 2018-03-09 한국해양대학교 산학협력단 Hybrid Protection Block for Buried Submarine Pipelines and Construction method
JP2017135980A (en) * 2017-04-10 2017-08-03 住友電気工業株式会社 Marine cable construction system, marine cable construction method, and construction ship
JP2019041533A (en) * 2017-08-28 2019-03-14 住友電気工業株式会社 Manufacturing method of cable with protective tube, manufacturing system of cable with protective tube, protective tube, and cable with protective tube

Similar Documents

Publication Publication Date Title
JP7090239B2 (en) How and system to operate one or more tugs
JP7090240B2 (en) How and system to operate one or more tugs
US9297142B2 (en) Dredge vessel system
US20220009602A1 (en) Tugboat with a capsizing and sinking prevention system
DK179634B1 (en) A tugboat with a crane for handling a towing line
US20170253302A1 (en) Systems, Methods and Units for Offloading or Loading Cargo at Sea
US4020777A (en) Vessel and apparatus for at-sea retrieval of buoys and anchors
EP3558810B1 (en) Device and method for paying out an elongated flexible article from a vessel
WO2017167893A1 (en) Boat with connection to shore
GB2439295A (en) Method and vessel for laying reeled articles at sea
JP2004166434A (en) Method and apparatus for attaching protective tube to long body to be laid on seabed
US20220227467A1 (en) Deployment of Unmanned Underwater Vehicles
JP2016190636A (en) Method and installation for laying mooring chain
JP2005121077A (en) Submarine pipe laying method
JP2854080B2 (en) Submarine cable laying boat
JP6823781B2 (en) Water work method
JP2018034650A (en) Method for laying mooring chain and mooring installation
JPH0656076A (en) Submarine cable laying construction method and laying work ship thereof
WO2004063002A1 (en) Self-propelled platform for watercraft
DK179117B1 (en) Tugboat with crane or robot arm
JP2004161184A (en) Cable laying pontoon
US4246860A (en) Method for anchor retrieval
AU2003232690B8 (en) A method and a vessel for pipe-laying at sea
KR20130003914A (en) Method for mounting azimuth thruster for ship on land
JP3819831B2 (en) Feeding out the long body for laying undersea

Legal Events

Date Code Title Description
A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20060530

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20061010