JPS601446B2 - Total assembly method of landing lift type offshore work platform - Google Patents

Total assembly method of landing lift type offshore work platform

Info

Publication number
JPS601446B2
JPS601446B2 JP2302780A JP2302780A JPS601446B2 JP S601446 B2 JPS601446 B2 JP S601446B2 JP 2302780 A JP2302780 A JP 2302780A JP 2302780 A JP2302780 A JP 2302780A JP S601446 B2 JPS601446 B2 JP S601446B2
Authority
JP
Japan
Prior art keywords
work platform
type offshore
dock
lift type
landing
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
Application number
JP2302780A
Other languages
Japanese (ja)
Other versions
JPS56119021A (en
Inventor
武久 井上
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.)
Mitsui Engineering and Shipbuilding Co Ltd
Original Assignee
Mitsui Engineering and Shipbuilding 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 Mitsui Engineering and Shipbuilding Co Ltd filed Critical Mitsui Engineering and Shipbuilding Co Ltd
Priority to JP2302780A priority Critical patent/JPS601446B2/en
Publication of JPS56119021A publication Critical patent/JPS56119021A/en
Publication of JPS601446B2 publication Critical patent/JPS601446B2/en
Expired legal-status Critical Current

Links

Description

【発明の詳細な説明】 〔発明の技術分野〕 本願発明は着地昇降式海上作業台の総組立方法に関する
ものである。
DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a total assembly method of a landing lift type offshore work platform.

〔従来技術〕[Prior art]

着地昇降式海上作業台は、第1図に示すように、昇降作
業台1、支持支柱2、支持支柱下端構造物3、及び昇降
作業台1を昇降させる昇降装置4から成り、その全重量
は7000トン〜9000トンにもなる。
As shown in Fig. 1, the landing lifting type offshore work platform consists of an lifting work platform 1, a support column 2, a lower end structure 3 of the support column, and a lifting device 4 for raising and lowering the lifting work platform 1, and its total weight is It can reach 7,000 to 9,000 tons.

上記支持支柱2の一辺は約8ので、その高さ‘ま80の
以上になる。
Since one side of the support column 2 is about 8, its height is more than 80.

また、この支持支柱2は、例えば直径が100cのの鋼
管を四隅に立て、これらの間を梁材で組んで一種のやぐ
ら形に構成しているが、この支持支柱の単位長さは湯重
設備により制限されるが、通常5仇程度である。そして
、この単位支柱を継手部で連結して前記高さとしている
。また、昇降作業台は一辺が、例えば約70mの変形五
角形で、その面積は約3200めである。このような、
巨大な着地昇降式海上作業台の支持支柱の下端には鋼板
製の下端構造物3が設けられているが、この下端構造物
3は軟弱な海底、或いは岩盤上に着座し、前記7000
トン〜9000トンにも及ぶ着地昇降式海上作業台の、
その荷重を分散して安定な状態で支持するために、その
下面は円錐、若しくは角錐状に突出している。前記着地
昇降式海上作業台の組立作業は、まず船渠内において昇
降作業台1の組立を行う。
In addition, this support column 2 is constructed by, for example, steel pipes with a diameter of 100 cm erected at the four corners and assembled with beams between them to form a kind of tower shape, but the unit length of this support column is Although it is limited depending on the equipment, it is usually around 5 enemies. Then, these unit supports are connected at a joint portion to achieve the above height. Further, the elevating workbench has a modified pentagonal shape with each side, for example, about 70 m, and its area is about 3200 m. like this,
A lower end structure 3 made of a steel plate is provided at the lower end of the support column of a huge landing type offshore work platform.
A landing lift type offshore work platform weighing between 9,000 tons and 9,000 tons.
In order to distribute the load and support it in a stable state, its lower surface protrudes in the shape of a cone or pyramid. In the assembly work of the above-mentioned landing lift type offshore work platform, first, the lift work platform 1 is assembled in the dock.

この組立においては、昇降作業台1を船渠上に配列した
盤木上に支持させる。そして、下端構造物3を昇降作業
台の支持支柱取付位置に位置させ、これの上に支持支柱
の一部を組立て作業台が自立できるようにし、次に単位
支柱を順次上方に継ぎ足して行く。このような、作業は
船渠、船台、作業台などで普通行われるが支持支柱2の
高さが高いこと、及び上記総組立場所のクレーンなどの
設備には、例えば高さの限度があることなどの理由で支
持支柱2の上部分を残して海上に浮上、若しくは海底に
自立させた後に海上クレーン、若しくは岸壁クレーンな
どを用いて上方に継ぎ足し完成させる方法が一般的であ
る。
In this assembly, the elevating work platform 1 is supported on blocks arranged on the dock. Then, the lower end structure 3 is located at the support column attachment position of the elevating work platform, a part of the support column is assembled on top of it so that the work platform can stand on its own, and then unit columns are successively added upward. Such work is normally carried out in docks, docks, work platforms, etc., but the height of the support strut 2 is high, and there is a height limit for equipment such as cranes in the general assembly area, for example. For this reason, the general method is to leave the upper part of the support column 2 and float it on the sea, or make it independent on the seabed, and then add it upward using a marine crane or a quay crane to complete it.

上記組立作業は新造船用船渠、又は船台において行われ
るが、この船渠、又は船台には一般に大荷重揚荷用の門
型クレーンが設けられているが、このクレーンは、一般
商船の高さ40の〜58mに合せて錫程が定められてい
るために、全体の高さが80m〜100の、或いはそれ
以上もある着地昇降式海上作業台の総組立を上記船渠内
で行うことは困難であり、上言己のように海上クレーン
、若しくは岸壁クレーンなどの高揚程のクレーンを用い
て行なわざるを得なかったのである。
The above-mentioned assembly work is carried out in the dock or slipway for new ships, and this dock or slipway is generally equipped with a portal crane for lifting large loads. Because the height of the tin is set according to the height of ~58m, it is difficult to assemble a lift-type offshore work platform with a total height of 80m to 100m or more within the dock. As mentioned above, the work had to be carried out using a high-lift crane such as a marine crane or a quay crane.

第2図は、海上に移された昇降作業台1に対し、海上ク
レーン10で支持支柱2の継ぎ足しを行っているところ
である。
In FIG. 2, a support column 2 is being added by a marine crane 10 to an elevating work platform 1 that has been moved to the sea.

しかし、このような方法では、組立作業場を、その作業
の途中で変えねばならず、費用と時間がかかることにな
る。特に、着地昇降式海上作業台の半完成品を海上に移
動するに際には十分に水深のある海域を選定しなければ
ならない。しかも、海上における作業は海象条件に左右
されると共に、機材、人員の現場までの運搬が煩雑であ
った。〔発明の目的〕 本発明は、前記従来技術の欠点を解消するために得られ
たものであって揚程の高いクレーンを使用することなく
船渠内、又は船台において着地昇降式海上作業台の組立
を行う方法を提供するものである。
However, in this method, the assembly work site must be changed during the work, which is costly and time consuming. In particular, when moving a semi-finished product of a landing lift type offshore work platform to the sea, a sea area with sufficient depth must be selected. Moreover, work at sea was affected by sea conditions, and transporting equipment and personnel to the site was complicated. [Object of the Invention] The present invention was achieved in order to eliminate the drawbacks of the prior art, and it is capable of assembling a landing lift type offshore work platform in a dock or on a ship's platform without using a crane with a high lifting height. It provides a method to do so.

〔発明の構成〕[Structure of the invention]

すなわち、本発明の着地昇降式海上作業台の総組立方法
は、船渠内で着地昇降式海上作業台を縄立るに際し、前
記船渠内に壁で囲みを造り、この囲みの中に砂、或いは
その他粒状の応力分散体を充填し、この応力分散体の上
で昇降作業台に支持支柱を組付けて、これを自立させ、
次いで昇降作業台上に設備したクレ−ンによって既に組
み立てられた支持支柱の上部に単位支柱を順次組付ける
ことを特徴とするものである。
That is, in the total assembly method of the landing type lifting type offshore work platform of the present invention, when the landing type lifting type offshore work platform is erected in a dock, an enclosure is built in the dock with a wall, and sand or In addition, a granular stress dispersion material is filled, a support column is assembled on the lifting work platform on top of this stress dispersion material, and the support column is made to stand on its own.
This method is characterized in that the unit columns are then sequentially assembled onto the already assembled support columns using a crane installed on the elevating workbench.

〔実施例〕〔Example〕

次に、図面を参照して本発明の実施例を説明する。 Next, embodiments of the present invention will be described with reference to the drawings.

まず、第4図に示すように、船渠の底5上の所定の箇所
に壁7により囲み17を造り、この囲み17内に砂、或
いはその他粒状の応力分散体6を所定の高さまで充填す
る。
First, as shown in FIG. 4, an enclosure 17 is built with a wall 7 at a predetermined location on the bottom 5 of the dock, and this enclosure 17 is filled with sand or other granular stress dispersion material 6 to a predetermined height. .

しかる後に、第3図aに示すように、この応力分散体6
の上で昇降作業台1に支持支柱2aを組子付けて、これ
を自立させる。
After that, as shown in FIG. 3a, this stress dispersion body 6
A support column 2a is attached to the elevating workbench 1 on the platform to make it self-supporting.

次いで昇降作業台1上にクレーン8を据え、このクレー
ン8によりすでに組み立てられた支持支柱2aの上に単
位支柱2bを、順次、継ぎ足す。
Next, a crane 8 is placed on the lifting workbench 1, and unit columns 2b are sequentially added onto the support columns 2a already assembled by the crane 8.

この単位支柱2bの継ぎ足し‘こよって組立済みの複数
本の支持支柱2の高さがほぼ同一となったならば、次に
、第3図bのように、昇降装置4によって昇降作業台1
をジャッキアップし、更に単位支柱2bの継ぎ足しを行
う。この作業を繰り返せば、最上段の単位支柱2bまで
継ぎ足しを行うことができる。上記のように、昇降作業
台1を昇降装置4によって順次上昇させ、この昇降作業
台1上に搭載したクレーン8を利用して単位支柱2bを
すでに組み立てられた支持支柱2aの上に積み上げけ行
くので、この作業に要対する特別な足場が必要でなく、
またクレーン8も錫程の短いもので足りる。
When the heights of the assembled support columns 2 become almost the same by adding unit columns 2b, next, as shown in FIG.
jack up, and then add unit struts 2b. By repeating this operation, it is possible to add up to the uppermost unit column 2b. As mentioned above, the elevating work platform 1 is sequentially raised by the elevating device 4, and the unit columns 2b are stacked on the already assembled support struts 2a using the crane 8 mounted on the elevating work platform 1. Therefore, no special scaffolding is required for this work;
Also, the crane 8 can be as short as a tin.

一般に、船渠はコンクリートによって建造されており、
分散荷重は負担できるが局部的な大荷重は負担すること
が困難である。支持支柱2aに設けられた下端構造物3
は大荷重を安定して海上に支持する必要がある。そのた
めに、下面は円錐、又は角錐形にその中央が突出してい
るので、局部的な荷重が船渠の底に加わることになる。
支持支柱2aの継ぎ足しが進むにしたがって昇降作業台
1の総重量が増加し、これを3〜4個の下端構造物3で
船渠の底部6で支持することが困難となり、場合によっ
ては下端構造物3の下部が破壊されるか、船渠の底部が
破壊される恐れがある。
Generally, docks are constructed of concrete.
It is possible to bear a distributed load, but it is difficult to bear a large local load. Lower end structure 3 provided on support column 2a
It is necessary to stably support a large load on the sea. For this reason, the lower surface has a conical or pyramidal shape with its center protruding, so that a local load is applied to the bottom of the dock.
As the support columns 2a are added, the total weight of the lifting platform 1 increases, and it becomes difficult to support it at the bottom 6 of the dock with three to four lower end structures 3, and in some cases, the lower end structures 3 There is a risk that the lower part of 3 will be destroyed or the bottom of the dock will be destroyed.

その大きな原因としては下端構造物3の下面の一部が突
出したり、或いは空隙があるためであり、そのために局
部応力が発生するからである。局部応力の発生を防止し
て船渠の底部5に分布荷重を与える手段としては、下端
構造物3の下面に多数の盤木を並べて支持する方法が一
般的であるが、この方法で巨大な荷重を分散することは
困難である。本発明にあっては、上記の如く、船渠の底
部5上に壁7によって囲み17を形成し、この囲み17
内に砂などの応力分散体6を充填し、この応力分散体6
の上で支持支柱2aの絹付けを行うから下端構造物3に
着地昇降式海上作業台の全重量がかかるわけであるが、
その重量は下端構造物3の全面積、或いはこの面積より
更に広い部分に均一に分散されるのである。
A major reason for this is that a portion of the lower surface of the lower end structure 3 protrudes or there is a gap, which causes local stress. As a means of applying a distributed load to the bottom 5 of the dock while preventing the generation of local stress, it is common to support a large number of planks lined up on the bottom surface of the lower end structure 3. is difficult to disperse. In the present invention, as described above, the enclosure 17 is formed by the wall 7 on the bottom 5 of the dock, and the enclosure 17 is
A stress dispersion material 6 such as sand is filled in the inside, and this stress dispersion material 6
Since the support struts 2a are attached above the lower end structure 3, the entire weight of the lifting type offshore work platform is placed on the lower end structure 3.
The weight is uniformly distributed over the entire area of the lower end structure 3 or over a wider area than this area.

この応力分散体6は、通常の砂、或いはその他の粒状物
でよいが、その流動性を調節するために水分を若干与え
たり、粒度の異なる砂を混合してもよい。
This stress dispersion body 6 may be ordinary sand or other granular material, but in order to adjust its fluidity, some moisture may be added or sand of different particle sizes may be mixed.

〔発明の効果〕〔Effect of the invention〕

上記のように、本発明は船渠内で着地昇降式海上作業台
を紐立るに際し、前記船渠内に壁で囲みを造り、この囲
みの中に砂、或いはその他粒状の応力分散体を充填し、
この応力分散体の上で昇降作業台に支持支社を組付けて
、これを自立させ、次いで昇降作業台上に設置したクレ
ーンによって既に組み立てられた支持支柱の上部に単位
支柱を順次組付けたので、着地昇降式海上作業台の全重
量が分散されるようになり、従来不可能とされていた船
渠内での着地昇降式海上作業台の建造が可能になる。
As described above, the present invention, when erecting a landing lift type offshore work platform in a dock, builds an enclosure with a wall in the dock, and fills this enclosure with sand or other granular stress dispersion material. ,
A support branch was assembled on the lifting platform on top of this stress dispersion body to make it independent, and then the unit columns were sequentially assembled on top of the support columns already assembled by a crane installed on the lifting platform. , the entire weight of the landing lift type offshore work platform is now distributed, making it possible to construct a landing lift type offshore work platform inside a dock, which was previously considered impossible.

従って、海上クレーンを準備したり、半完成品の着地昇
降式海上作業台を所定の水深の海域まで移動する必要が
ないので、その移動海域の設定、移動海域における海象
条件、人員の移動などを総て省略することができ、船渠
、又は船台において着地昇降式海上作業台を安全、かつ
能率的に建造することができる。
Therefore, there is no need to prepare a marine crane or move the semi-finished elevating offshore work platform to a predetermined depth of water, so it is not necessary to set the area to which it will be moved, the sea conditions in the area it is being moved to, the movement of personnel, etc. All of these steps can be omitted, and an elevating and lowering type offshore work platform can be safely and efficiently constructed in a dock or on a ship's platform.

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

第1図は着地昇降式海上作業台の一般構造を示す側面図
、第2図は従来の支柱組み立て方法を示す側面図、第3
図a、及び第3図bは本発明による支柱組み立て方法を
示す側面図、第4図は本発明の要部拡大図である。 1・・・・・・昇降作業台、2・・…・支持支柱、3・
・・・・・下端構造物、4・・・・・・昇降装置、5…
・・・船渠の底部、6・・・・・・応力分散体、7・・
・・・・壁、8・・・・・・クレーン、17……囲み。 第1図第2図 第3図 第4図
Figure 1 is a side view showing the general structure of a landing lift type offshore work platform, Figure 2 is a side view showing the conventional method of assembling columns, and Figure 3
Figures a and 3b are side views showing the strut assembly method according to the present invention, and Figure 4 is an enlarged view of the main parts of the present invention. 1... Elevating work platform, 2... Support column, 3...
...lower end structure, 4...lifting device, 5...
・・・Bottom of dock, 6... Stress dispersion body, 7...
...wall, 8...crane, 17...enclosure. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

【特許請求の範囲】[Claims] 1 船渠内で着地昇降式海上作業台を組立るに際し、前
記船渠内に壁で囲みを造り、この囲みの中に砂、或いは
その他粒状の応力分散体を充填し、この応力分散体の上
で昇降作業台に支持支柱を組付けて、これを自立させ、
次いで昇降作業台上に設置したクレーンによって既に組
み立てられた支持支柱の上部に単位支柱を順次組付ける
ことを特徴とする着地昇降式海上作業台の総組立方法。
1. When assembling a landing lift type offshore work platform in a dock, build an enclosure with a wall in the dock, fill this enclosure with sand or other granular stress dispersion material, and place it on top of this stress dispersion material. Attach a support column to the lifting workbench to make it independent.
A method for assembling a landing lift type offshore work platform, which comprises sequentially assembling unit columns on top of the already assembled support columns using a crane installed on the lift work platform.
JP2302780A 1980-02-25 1980-02-25 Total assembly method of landing lift type offshore work platform Expired JPS601446B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2302780A JPS601446B2 (en) 1980-02-25 1980-02-25 Total assembly method of landing lift type offshore work platform

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2302780A JPS601446B2 (en) 1980-02-25 1980-02-25 Total assembly method of landing lift type offshore work platform

Publications (2)

Publication Number Publication Date
JPS56119021A JPS56119021A (en) 1981-09-18
JPS601446B2 true JPS601446B2 (en) 1985-01-14

Family

ID=12098984

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2302780A Expired JPS601446B2 (en) 1980-02-25 1980-02-25 Total assembly method of landing lift type offshore work platform

Country Status (1)

Country Link
JP (1) JPS601446B2 (en)

Also Published As

Publication number Publication date
JPS56119021A (en) 1981-09-18

Similar Documents

Publication Publication Date Title
CA1115071A (en) Methods and apparatus for offshore operations
EP1356205B1 (en) Method and apparatus for placing at least one wind turbine on open water
CN113348289B (en) Multi-column wind turbine tower and erection method
CN115812066A (en) Crane vessel for lifting an offshore wind turbine or a component thereof
US4283890A (en) Transportable bed for industrial equipment
JPS6047410B2 (en) Test method for landing lift type offshore work platform
US3998029A (en) Tower crane climbing
JPS601446B2 (en) Total assembly method of landing lift type offshore work platform
US2847755A (en) Method of erecting floating roofs and apparatus therefor
JPS58512A (en) Construction of large-size structure in dock
JPH01190883A (en) Lift up or down method
JPS6030808B2 (en) How to install a drilling and crude oil production platform with a heavy foundation
US3107495A (en) Method of erecting an offshore structure
JPS631408B2 (en)
CN216687242U (en) Railing is prevented to tower crane bottom suitable for non-plane ground
CN221194450U (en) Can have enough to meet need assembled construction elevator safety channel
JPS5936054B2 (en) How to assemble a landing lift type offshore work platform
US4883389A (en) Method for constructing huge modules, and a module fabricated by said method
JPS5820813A (en) Fabrication of landing and elevating type offshore working platform
JPS5833628A (en) Supporting of offshore working platform
JPS587015A (en) Leg assembling method for high lift landing type elevating working platform
JPH06101348A (en) Method for constructing tower
JPS59223692A (en) Large-sized mobile type crawler crane
JP2024061311A (en) Method for dismantling and assembling a wind turbine
JPS58513A (en) Construction of marine structure