JPS60199111A - Vertically movable type offshore working platform - Google Patents

Vertically movable type offshore working platform

Info

Publication number
JPS60199111A
JPS60199111A JP5502484A JP5502484A JPS60199111A JP S60199111 A JPS60199111 A JP S60199111A JP 5502484 A JP5502484 A JP 5502484A JP 5502484 A JP5502484 A JP 5502484A JP S60199111 A JPS60199111 A JP S60199111A
Authority
JP
Japan
Prior art keywords
tank
preload
platform
leg
legs
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
JP5502484A
Other languages
Japanese (ja)
Inventor
Ryuichi Yamaji
山路　隆一
Akira Ando
彰 安藤
Ryoichi Kojima
小嶋　良一
Yoshiteru Yura
由良　嘉輝
Kiyoo Amako
尼子　清夫
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.)
Hitachi Zosen Corp
Original Assignee
Hitachi Zosen 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 Hitachi Zosen Corp filed Critical Hitachi Zosen Corp
Priority to JP5502484A priority Critical patent/JPS60199111A/en
Publication of JPS60199111A publication Critical patent/JPS60199111A/en
Pending legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B17/04—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction
    • E02B17/08—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering
    • E02B17/0809—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering the equipment being hydraulically actuated
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B17/04—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction
    • E02B17/06—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for immobilising, e.g. using wedges or clamping rings
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B17/04—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction
    • E02B17/08—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering
    • E02B17/0836—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering with climbing jacks
    • E02B17/0854—Equipment specially adapted for raising, lowering, or immobilising the working platform relative to the supporting construction for raising or lowering with climbing jacks with clamping wedges, eccentric clamping devices and so on
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B2017/0039—Methods for placing the offshore structure
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B2017/0056—Platforms with supporting legs
    • E02B2017/006—Platforms with supporting legs with lattice style supporting legs
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B17/00—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor
    • E02B2017/0056—Platforms with supporting legs
    • E02B2017/0073—Details of sea bottom engaging footing
    • E02B2017/0082—Spudcans, skirts or extended feet

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)

Abstract

PURPOSE:To reduce the weight of an offshore working platform as well as relieve variable loads by a method in which a preload tank is provided in legs in a vertically movable manner, and a fixer to fix the preload tank at any position of the legs is also provided. CONSTITUTION:Legs 3 are lowered by a jack unit 8, and when the weight of a preload tank 10 is equalized with the buoyancy to be applied to the tank 10, the clamp 13 of a fixer 11 is removed from a rack 14 to fix the tank. The legs 3 are lowered continuously, and at a time when a platform 2 reaches the height of the preload tank 10, the rise of the platform 2 is stopped, and the tank 10 is fixed to the rack 14 by the fixer 11. Ballast water is charged into not only the tank 10 but also a tank in the platform 2 through a hose 17 from the line 16 through which water is supplied to the tank 10. When the increase of penetration of the legs 3 is not recognized, the valve 20 of the drain pipe 18 is opened to discharge ballast water in both tanks, and then the platform 2 is jacked up to air gap during the operation.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は昇降式海上作業台に関するものである。[Detailed description of the invention] Industrial applications The present invention relates to an elevating type offshore work platform.

従来例の構成とその問題点 従来、昇降式海上作業台のプレロード（据伺けを確実に
するためブラットフ謔−ム昇降後レグに荷重を１１′Ｉ
極的にかける作業）は、プラットフォームに設けたプレ
ロードタンクに湿水することによって行われており、プ
レロード水の全荷重がジヤツキユニットを介してレグに
伝えられる。このため、プレロードタンクとして大きな
ｆ＃ｆｆ＜をブラフオームに設けなければならず、構造
上もプラットフォームを強固に設計する必要があった。Conventional configuration and its problems Previously, preloading of elevating offshore work platforms (load of 11'I was applied to the leg after lifting the platform to ensure stability)
This work is carried out by wetting a preload tank on the platform, and the full load of preload water is transferred to the legs via the jacking unit. For this reason, it was necessary to provide a large f#ff< as a preload tank in the bluff ohm, and it was necessary to design the platform to be structurally strong.

一方、プレロード中あるいはジヤツキアップ後の稼動中
に突然レグが沈下することがあるが、従来この点につい
て何ら対策が施、されていガかった。On the other hand, the legs may suddenly sink during preloading or during operation after jacking up, but no countermeasures have been taken in the past to prevent this problem.

発明の目的 本発明は上記従来の問題を解消する昇降式／ｌｊト上作
莱台を提供することを目的とする。OBJECTS OF THE INVENTION It is an object of the present invention to provide an elevating/lowering type/lj top lifting platform which solves the above-mentioned conventional problems.

発明の構成 上記目的を達成するため、本発明の昇降式海上作業台は
、レグ内にプレロードタンクラ」二下移動可能に設け、
このプレロードタンクをレグの任意の箇所に固定する固
定装置！１を設ける構成としたものであり、これにより
、レグを昇降さゼる場合は、海面にプレロードタンクラ
浮かせることによりレグとプレロードタンクとの縁切り
を行うことができ、レグに荷重をかける場合は、固定装
置でプレロードタンクをレグに固定し、注水することに
よシ加重をかけることができる。したがって、プラット
フォームにプレロードタンク用の饋ＪＩｉＩ：を設けな
くて済むとともに、プラットフォームの構造を簡略化す
ることができ、かつレグが突然沈下した場合にはプレロ
ードタンクでレグに大きな浮力を与えることができるも
のである。Structure of the Invention In order to achieve the above object, the elevating type offshore work platform of the present invention is provided with a preload tanker movably installed in the leg,
A fixing device that fixes this preload tank to any location on the leg! 1. With this, when the leg is being raised or lowered, it is possible to separate the leg from the preload tank by floating the preload tank on the sea surface, and when applying a load to the leg, By fixing the preload tank to the leg with a fixing device and filling it with water, a load can be applied. Therefore, it is not necessary to provide a preload tank on the platform, the structure of the platform can be simplified, and if the leg suddenly sinks, the preload tank can provide large buoyancy to the leg. It is something.

実施例と作用 以下、本発明の一実施例を図面に基づいて説明する。Examples and effects Hereinafter, one embodiment of the present invention will be described based on the drawings.

第１図〜第４図において、（１）は本発明に係る昇降式
海上作業台、（２）はプラットフォーム、（３）バコー
ド（４）、プレース（５）等から構成される複数本のレ
グ、（６）は各レグ（３）の下端に設けられたスパッド
タンクである。各レグ（３）のコード（４）外側にはレ
グ昇降用ラック（７）が沿わせて設けられてお９、これ
にプラットフォーム（２）上に設けたジヤツキユニット
（８）のビニオン（９）が歯合されている。したがって
、ジヤツキユニット（８）を駆動させることにより、各
レグ（３）はプラットフォーム（２）に対して昇降自在
である。Ｑ（ｌは各レグ（３）内に上下移動可能に設け
られた三用柱形状のプレロードタンク（例えばその−辺
が約８ｍ、高さ約１５ｍ１賽積約４８Ｏｎ？　）　、Ｑ
υはプレロードタンクａ０各０Ｉｌｌ縁の上部と下部に
設けられた同定装置で、プレロードタンクリ０側に水平
固定された油圧ジヤツキ＠と、この油圧ジヤツキ＠の出
退杆先端に取付けられたクランプ０３とから（イク成さ
れている。そして、レグ（３）の各コード（４）内側に
は前記固定装置０υのクランプ０３が嵌合可能なタンク
固定用ラック０弔が沿わせて設けられている。In Figures 1 to 4, (1) is an elevating offshore work platform according to the present invention, (2) is a platform, and (3) is a plurality of legs consisting of a barcode (4), a place (5), etc. , (6) is a spud tank provided at the lower end of each leg (3). A leg raising/lowering rack (7) is provided along the outside of the cord (4) of each leg (3), and a binion (9) of the jacking unit (8) installed on the platform (2) is attached to this rack. ) are interlocked. Therefore, by driving the jack unit (8), each leg (3) can be raised and lowered with respect to the platform (2). Q (l is a three-post-shaped preload tank installed in each leg (3) so that it can be moved up and down (for example, the side is about 8 m, the height is about 15 m, and the pile is about 48 On?), Q
υ is an identification device installed at the top and bottom of the edge of the preload tank a0 and each 0Ill, and includes a hydraulic jack @ fixed horizontally on the preload tank 0 side, and a clamp 03 attached to the tip of the retractable rod of this hydraulic jack @. Then, on the inside of each cord (4) of the leg (3), a tank fixing rack to which the clamp 03 of the fixing device 0υ can be fitted is provided along. .

（ハ）はプレロードタンク四の上面に設けられたプレロ
ード注水用コネクションで、このコネクション＜ｌｆ９
にプラットフォーム（２）のプレロード注水用ラインα
Ｇから延ばされたフレキシブルホース０７）が接続され
ている。０榎はプレロードタンクＯＱＯ内底部に設けら
れた排水管で、一端にタンク底面に対向して開口するべ
ｐマクスα場が設けられ、他端をタンク下面に開口せし
められている。四は排水管（至）の途中に介装されたパ
ルプで、このパ／ｌ／７’（イ）にはプレロードタンク
αｑ上面のデツキスタンド（２１）から垂下されたリー
チロッド（ホ）が接続され、プレロードタンクＣＩＱ上
から操作自在とされている。(c) is a connection for preload water injection provided on the top surface of preload tank 4, and this connection <lf9
Preload water injection line α on platform (2)
A flexible hose 07) extending from G is connected. 0 Enoki is a drain pipe provided at the inner bottom of the preload tank OQO, and one end is provided with a bepmax α field that opens opposite the tank bottom, and the other end is opened at the bottom of the tank. 4 is the pulp inserted in the middle of the drain pipe (to), and the reach rod (e) hanging from the deck stand (21) on the top of the preload tank αq is connected to this pa/l/7' (a). It is said that it can be operated from the top of the preload tank CIQ.

以下、上記構成における作用について説明する。The effects of the above configuration will be explained below.

先ず、第５図に示すように、昇降式海上作業台（１）の
曳航中は、プレロードタンクＱＯをスパッドタンク（（
ｉ）　＋６：上位ＩＲに固定装置ｉ’ｔすυで固定する
。固定は、第４図にボした固定装置Ｕυの油圧ジャツギ
四を作動させ、クランプ０：９をタンク固定用ラック（
１，４＋に嵌合させて竹う。First, as shown in Figure 5, while the elevating offshore work platform (1) is being towed, the preload tank QO is connected to the spud tank ((
i) +6: Fixed to the upper IR with a fixing device i't υ. For fixing, operate the four hydraulic jacks of the fixing device Uυ shown in Figure 4, and attach the clamp 0:9 to the tank fixing rack (
Fit it to 1, 4+ and attach it.

目的地に到着すれば、第６図に示すように、ジヤツキユ
ニット（８）で各レグ（３）を降下させて行く。When the destination is reached, each leg (3) is lowered by the jack unit (8) as shown in FIG.

そして、プレロードタンクαＱ自身のｉｂ’ｔとプレロ
ードタンク０１に加わる浮力が等しくなったとき（例え
ば、吃水約２ｍ）、固定装置０υのクランプ０坤をタン
ク固定用ラック圓から外す。Then, when the ib't of the preload tank αQ itself and the buoyancy force applied to the preload tank 01 become equal (for example, about 2 m of water), the clamp 0k of the fixing device 0υ is removed from the tank fixing rack circle.

レグ（３）の降下を続行し、プラットフォーム（２）が
プレロード、１ｈさく例えはニアギャップ約１．５ｍ）
になった時点で、第７図に示すように、プラットフォー
ム（２）の上昇を停止する。このとき、固定装置Ｑυで
プレロードタンク叫をタンク固定用ラックＱ４）に固定
する。そして、プラットフォーム（２）内のタンクと同
時に、プレロードタンク叫へプレロード注水用ライン（
１からフレキシブルホースＯηおよびプレロード注水用
コネクション（ＩＱを通してパラスト水を注水する。Continue descending leg (3), platform (2) is preloaded, 1 hour (for example, near gap approximately 1.5 m)
At this point, as shown in FIG. 7, the platform (2) stops rising. At this time, the preload tank is fixed to the tank fixing rack Q4) using the fixing device Qυ. At the same time as the tank in platform (2), the preload water injection line (
Inject palast water from 1 through the flexible hose Oη and the preload water injection connection (IQ).

注水完了後、レグ（３）の貢入増加が認められなければ
プラットフォーム（２）内のタンクと同時に、プレロー
ドタンクＱＯ内のパラスト水を排出する。すなわち、第
３図に示したデツキスタンドＱυを操作することによっ
て排水管（至）のパルプｇＪを開ける。After water injection is completed, if an increase in the contribution of leg (3) is not recognized, the palast water in the preload tank QO is discharged at the same time as the tank in the platform (2). That is, by operating the deck stand Qυ shown in FIG. 3, the pulp gJ of the drain pipe (end) is opened.

プレロードが完了すれば、第８図に示すように、Ｎｍｔ
時のエアギャップまでプラットフォーム（２）をジヤツ
キアップする。When the preload is completed, as shown in Figure 8, Nmt
Jack up the platform (2) until the air gap is reached.

一方、レグ（３）を引き抜くときはプレロードタンクＯ
ｑ自身のｍ泣とプレロードタンクＯｑに加わる浮力が等
しくなったとき、固定装置０】λのクランプ０４をタン
ク固定用ラック（＋４から外す。そして、レグ（３）が
完全に上昇した後、固定装ｆｆ’＜　（１１）で再びプ
レロードタンクｕＱをレグ（３）　１ｊｌｌに固定する
。On the other hand, when pulling out leg (3), use the preload tank O.
When the buoyancy of q itself and the buoyancy applied to the preload tank Oq become equal, remove the clamp 04 of the fixing device 0/λ from the tank fixing rack (+4). Then, after the leg (3) has completely risen, Fix the preload tank uQ to the leg (3) 1jll again by fixing ff'< (11).

発明の効果 以上本発明によれば、レグを昇降させる場合は、筋向に
プレロードタンクを浮かせることによりレグとプレロー
ドタンクとの縁切りを行うことができ、レグに荷重をか
ける場合は、固定装置でブレロードタンクをレグに固定
し、注水することにより加重をかけることができる。し
たがって、次のような効果を得ることができる。Effects of the Invention According to the present invention, when raising or lowering the leg, the edge of the leg and the preload tank can be cut by floating the preload tank in the direction of the stripe, and when applying a load to the leg, the fixing device can By fixing the brake load tank to the leg and filling it with water, weight can be applied. Therefore, the following effects can be obtained.

（１）　プレロード時、ジヤツキユニットにがかる向市
を例えばレグあたシ約４８０トン軽減することができる
。これにより、ジヤツキユニットやレグが損傷する確率
を下げることができる。(1) During preloading, the load on the jacking unit can be reduced by, for example, about 480 tons of leg weight. This can reduce the probability of damage to the jack unit or leg.

（２）　プラノ１−フオーム内のプレロードタンクを例
えば合計約１４４０　）ン（３本レグの場合）分減少さ
せることができ、このヌベースを機器配置等に有効利用
できる。(2) The preload tank in the plano 1-form can be reduced by, for example, a total of about 1440 mm (in the case of 3 legs), and this Nubase can be effectively used for equipment placement, etc.

（３）　大きなプレロードタンクを特別な昇降装置なし
でレグ内を移動させることができる。(3) Large preload tanks can be moved within the legs without special lifting equipment.

（４）　もしレグが突然沈下した場合、レグあたり例え
ば最大約４８０トンの浮力がプレロードタンクによって
働き、大きな貫入または転到を防止することができる。(4) If a leg suddenly sinks, a buoyant force of up to about 480 tons per leg, for example, can be exerted by the preload tank to prevent a major penetration or tipping.

（５）　プラットフォーム内のプレロードが減少するた
め、プラットフォーム構造を簡略化でき、その結果プラ
ットフォームの重か軽減、バリアゲルロードの減少を期
待できる。(5) Since the preload within the platform is reduced, the platform structure can be simplified, and as a result, it is expected that the weight of the platform will be reduced and the barrier gel load will be reduced.

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

図面は本発明の一実施例を示し、第１図は昇降式海上作
柴台の側面図、第２図はレグの平面図、第３図はレグお
よびプレロードタンクの側面図、第４図は固定装置の拡
大側面図、第５図〜第８図はそれぞれ動作説明図である
。 （１）・・・昇降式海上作某台、（３）・・・レグ、０
１・・・プレロードタンク、０υ・・・固定装置 代理人　森　本　義　弘 第１図 第２図 第３図 Ａ 第４図 第５図 ６　６ 第７図 第６図 第ε図The drawings show one embodiment of the present invention, and FIG. 1 is a side view of an elevating type offshore drying platform, FIG. 2 is a plan view of the leg, FIG. 3 is a side view of the leg and preload tank, and FIG. The enlarged side view of the fixing device and FIGS. 5 to 8 are operation explanatory diagrams, respectively. (1)...Elevating type offshore work platform, (3)...Leg, 0
1... Preload tank, 0υ... Fixed device agent Yoshihiro Morimoto Figure 1 Figure 2 Figure 3 A Figure 4 Figure 5 6 6 Figure 7 Figure 6 Figure ε

Claims (1)

【特許請求の範囲】[Claims] １、　レグ内にプレロードタンクを上下移動可能に設ケ
、このプレロードタンクをレグの任意の箇所に固定する
固定装置を設けたことを特徴とする昇降式海上作業台。1. An elevating offshore work platform characterized by having a preload tank movable up and down inside the leg, and a fixing device for fixing the preload tank to any location on the leg.
JP5502484A 1984-03-21 1984-03-21 Vertically movable type offshore working platform Pending JPS60199111A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5502484A JPS60199111A (en) 1984-03-21 1984-03-21 Vertically movable type offshore working platform

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5502484A JPS60199111A (en) 1984-03-21 1984-03-21 Vertically movable type offshore working platform

Publications (1)

Publication Number Publication Date
JPS60199111A true JPS60199111A (en) 1985-10-08

Family

ID=12987094

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5502484A Pending JPS60199111A (en) 1984-03-21 1984-03-21 Vertically movable type offshore working platform

Country Status (1)

Country Link
JP (1) JPS60199111A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016144307A1 (en) * 2015-03-09 2016-09-15 Noble Drilling Services Inc. Jackup drilling unit having material storage in jacking legs

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016144307A1 (en) * 2015-03-09 2016-09-15 Noble Drilling Services Inc. Jackup drilling unit having material storage in jacking legs

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