JPS61106815A - Off-shore working platform - Google Patents

Off-shore working platform

Info

Publication number
JPS61106815A
JPS61106815A JP22679884A JP22679884A JPS61106815A JP S61106815 A JPS61106815 A JP S61106815A JP 22679884 A JP22679884 A JP 22679884A JP 22679884 A JP22679884 A JP 22679884A JP S61106815 A JPS61106815 A JP S61106815A
Authority
JP
Japan
Prior art keywords
footing
water
communication means
pedestal
pipe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP22679884A
Other languages
Japanese (ja)
Other versions
JPH0121284B2 (en
Inventor
Yohan Hansen Furoodo
フロード ヨハン ハンセン
Piitaa Henrikusen Iensu
イエンス ピーター ヘンリクセン
Masaki Yamaguchi
山口 正記
Tadaharu Inoue
井上 忠春
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.)
Kumagai Gumi Co Ltd
Original Assignee
Kumagai Gumi 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 Kumagai Gumi Co Ltd filed Critical Kumagai Gumi Co Ltd
Priority to JP22679884A priority Critical patent/JPS61106815A/en
Priority to CN85104936A priority patent/CN85104936B/en
Publication of JPS61106815A publication Critical patent/JPS61106815A/en
Publication of JPH0121284B2 publication Critical patent/JPH0121284B2/ja
Granted legal-status Critical Current

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02BHYDRAULIC ENGINEERING
    • E02B17/00Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)
  • Revetment (AREA)

Abstract

PURPOSE:To cause a footing to be lowered to a position deep in a ground, by a method wherein an enclosed space is formed with a leg column, having a hollow part, or a skirt, attached around the footing, and a sea bottom, and high pressure water is fed through the closed space into the hollow part. CONSTITUTION:A leg column 12 of a off-shore working platform is seated on a sea bottom, and an enclosed space 32 is formed with the leg column 12, a footing 14, and a skirt 26. A valve 38 of a means 34 through which the inside and the outside of the space 32 are intercommunicated, and a valve 40 of a means 36, through which the space 32 and a hollow part 28 of the leg column 12 are intercommunicated, are opened. Water at the outside flows in the space 32 through a pipe 34a and branch pipes 34b, 34c to disturb a sedimentary layer H, and a component, with which the sedimentary layer H is formed, is mixed with water. The component, mixed with water, is fed to the leg column 12 and the hollow part 28 through a pipe 36, the sedimentary layer H below the footing 14 is removed, and the footing 14, i.e., a working platform is gradually lowered.

Description

【発明の詳細な説明】 (技術分野) 本発明は、海洋、湖沼、河川等に設置される水上作業台
、特に、海洋で用いられる水上作業台に関する。
DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a floating work platform installed in the ocean, lakes, rivers, etc., and particularly relates to a floating work platform used in the ocean.

(従来技術) 水上作業台は、例えば洋上での石油、天然ガス等の資源
採掘のために使用され、作業甲板、該作業甲板を支持す
る複数の脚柱および各脚柱に取り付けられたフーチング
を備える。
(Prior Art) A floating work platform is used for mining resources such as oil and natural gas offshore, and includes a work deck, a plurality of pedestals supporting the work deck, and footings attached to each pedestal. Be prepared.

海洋に設置される水上作業台すなわち洋上作業台は、フ
ーチングが鼻底に着底しかつ作業甲板が海上に位置する
ように設置される。ところが、海底は土砂、ヘドロ、塵
、藻屑等の堆a層の表面によって規定されている′ため
、フーチング+1前記堆積層上に載。置されることとな
る。このことから、波力、風力の強いあるいは潮流の流
れの速1.%水域:′1        においては、
洋上作業台は不安定な状況下におかれることとなる。
A floating work platform installed in the ocean, that is, an offshore work platform, is installed so that the footing touches the bottom of the nose and the work deck is located on the sea. However, since the sea floor is defined by the surface of a sedimentary layer of sediment, sludge, dust, algae, etc., the footing +1 is placed on the sedimentary layer. It will be placed. From this, it can be determined that the wave force, wind force is strong, or the current speed is 1. % water area: ′1,
The offshore work platform will be placed in an unstable situation.

(発明の目的) したがって1本発明の目的は、フーチングを前記堆積層
下の岩盤上または前記堆積層の深い位置に到達させるこ
とができる水上作業台を提供することにある。
(Objective of the Invention) Accordingly, one object of the present invention is to provide a floating work platform that allows the footing to reach the bedrock below the sedimentary layer or a deep position in the sedimentary layer.

(発明の構成) 本発明に係る水上作業台は、水上に作業甲板を支持する
複数の脚柱および各脚柱に取り付けられたフーチングの
少なくとも一方に中空部分を設けたこと、前記脚柱また
はフーチングを取り巻いて設けられ、着底時に前記脚柱
またはフーチングの回りに密閉空間を形成するスカート
を設けたこと、および、前記密閉空間の内部と外部とを
連通させる第1の連通手段および前記中空部分と前記密
閉空間とを1通させる第2の連通手段を設けたことを特
徴とする。
(Structure of the Invention) A floating work platform according to the present invention is provided with a hollow portion in at least one of a plurality of pedestals that support a work deck on water and a footing attached to each pedestal. A skirt is provided surrounding the pedestal or footing to form a sealed space around the pedestal or footing when the footing is placed on the bottom, and a first communication means for communicating the inside and outside of the sealed space and the hollow portion. The present invention is characterized in that a second communication means is provided for allowing one communication between the air conditioner and the sealed space.

(発明の作用および効果) 本発明によれば、水上作業台を設置すべくフーチングお
よび前記スカートを水底すなわち前記堆      ・
積層上に着底させると、前記スカートが前記堆積層に突
き刺さって前記脚柱またはフーチングの回りに密閉空間
が形成される。
(Operations and Effects of the Invention) According to the present invention, in order to install a floating work platform, the footing and the skirt are connected to the bottom of the water, that is, the bank.
Upon landing on the stack, the skirt pierces the stack to form an enclosed space around the pedestal or footing.

水底近傍の水圧は前記中空部分の圧力よりも高いために
、前記密閉空間には第1の連通手段を介して外部から高
圧水が流入するとともに、前記第2の連通手段を介して
前記塞閉空間から前記中空部分へ水が流出する。このと
きの前記密閉空間内における水の流動により、フーチン
グ下の前記堆積層が撹乱され、水とともば前配管を経て
前記中空部分に運ばれる。このようにしてフーチング下
の堆積層が除去され、その除去に従ってフーチングが下
降する。こうして、フーチングを岩盤まであるいは堆積
層の深い位置まで到達させることができる。しかも、前
記中空部分内の圧力と水底近傍の圧力との差を利用する
ために、前配水の流動を生じさせるいかな′る動力も必
要としない。
Since the water pressure near the bottom of the water is higher than the pressure in the hollow portion, high-pressure water flows into the closed space from the outside via the first communication means, and the closed space is closed via the second communication means. Water flows out from the space into the hollow portion. At this time, the flow of water in the closed space disturbs the deposited layer under the footing and is carried along with the water to the hollow portion through the front pipe. In this way, the deposited layer under the footing is removed, and the footing is lowered as it is removed. In this way, the footing can reach deep into bedrock or sedimentary layers. Furthermore, since the difference between the pressure within the hollow portion and the pressure near the bottom of the water is utilized, no power is required to generate the flow of the pre-distributed water.

(発明の実施例) 本発明が特徴とするところは、図示の実施例についての
以下の説明により、さらに明らかとなろう。
(Embodiments of the Invention) Features of the present invention will become clearer from the following description of the illustrated embodiments.

第1図および第2図を参照すると、本発明に係る水上作
業台lOは複数の脚柱(図示の例では四本の脚柱)12
と、各脚柱に取り付けられかつ水底に着底されるフーチ
ング14と、複数の脚柱12によって水上に支持される
作業甲板16とを含む。
Referring to FIGS. 1 and 2, the floating work platform IO according to the present invention has a plurality of pedestals (four pedestals in the illustrated example) 12.
, a footing 14 attached to each pedestal and resting on the bottom of the water, and a work deck 16 supported on the water by a plurality of pedestals 12.

作業甲板16は、上端が作業甲板16に固定されかつ下
端が各脚柱12に固定された複数の管状の縦材17aお
よび各縦材と最土方に位置する後記プレース18とに連
結された複数の管状の斜材17bを介して脚柱12に支
持されている。
The work deck 16 includes a plurality of tubular vertical members 17a whose upper ends are fixed to the work deck 16 and whose lower ends are fixed to each pedestal 12, and a plurality of pipes connected to each vertical member and a place 18, which will be described later, located at the lowest point. It is supported by the pillar 12 via a tubular diagonal member 17b.

水上作業台lOは1通常、水面が縦材17aのほぼ中央
のレベルにあるように設置され、例えば海洋での石油、
天然ガス等の採掘作業のために使用される。
The floating work platform 1O is usually installed so that the water surface is at approximately the center level of the vertical member 17a.
Used for mining operations such as natural gas.

第2図に示すように、四本の脚柱12は正四角錐の稜線
に沿って伸び、隣接する脚柱12が、相互に、上下方向
に間隔をおかれた複数のプレース18を介して連結され
ている。
As shown in FIG. 2, the four pillars 12 extend along the ridgeline of a regular square pyramid, and adjacent pillars 12 are connected to each other via a plurality of places 18 spaced apart in the vertical direction. has been done.

フーチング14は、第3図に示すように、脚柱l2の軸
線に直交する環状部20と該環状部に地り囲まれかつこ
れと一体に形成された中央部22とで構成されている。
As shown in FIG. 3, the footing 14 is composed of an annular portion 20 perpendicular to the axis of the pedestal l2 and a central portion 22 surrounded by and integrally formed with the annular portion.

 脚柱12、プレース18、環状部20および中央部2
2は、共に、コンクリートaの筒体で形成されている0
脚柱12はその上端が閉塞し、その下端が開放している
Pillar 12, place 18, annular part 20 and central part 2
2 are both made of cylinders of concrete a.
The pedestal 12 is closed at its upper end and open at its lower end.

また、フーチングの中央部22は上端が開放し。Further, the upper end of the central portion 22 of the footing is open.

下端が閉塞している0脚柱12および中央部22は1M
−の内径および外径を有し、脚柱12の開放下端および
中央部22の開放上端が接した状態でこれらの内部に同
心的に配置されたリング状の一対の連結部材24を介し
て相互に接続されている1脚柱12、プレース18およ
びフーチング14は、コンクリート製とすることに代え
て、作業甲板16および縦材17a、斜材17bと同様
に、鋼製とすることかもきる。また、これらを、筒状体
または管状体で構成することに代えて、後記中空部分2
8または中空部分30を有する中実(体で構成すること
もできる。
0 pillar 12 whose lower end is closed and the central part 22 are 1M
- an inner diameter and an outer diameter of Instead of being made of concrete, the one-leg column 12, place 18, and footing 14 connected to the can be made of steel, as are the working deck 16, the vertical members 17a, and the diagonal members 17b. Moreover, instead of configuring these with a cylindrical body or a tubular body, the hollow portion 2 described below
8 or a solid body with a hollow portion 30.

J″l フーチング14を取り巻くスカート26が、環状部20
の外周面に接して取り付けられている。
J″l The skirt 26 surrounding the footing 14 is connected to the annular portion 20.
It is attached in contact with the outer peripheral surface of the

第3図に示すスカート26は、その水モな開放面を規定
する下端がフーチングの中央部22の底部のレベルより
上方に位置している。なお、スカート26は脚柱12に
取り付けることもできる。
The skirt 26 shown in FIG. 3 has its lower end defining a wet open surface located above the level of the bottom of the central portion 22 of the footing. Note that the skirt 26 can also be attached to the pedestal 12.

脚柱12の中空部分28の一部および中央部22の中空
部分30の全部にパラスト用水Bを注入して水上作業第
1Oを設置するとき、フーチングの環状部20の一部、
中央部22の底部およびスカート26の下端が、土砂、
ヘドロ、塵、藻屑等の堆積層Hによって規定された水底
に着底する。このとき、フーチング14すなわち環状部
20の回りに密閉空間32が形成される。この例では、
密閉空間32は、水面下約120mの位置で形成される
When installing the floating work No. 1 O by injecting the palast water B into a part of the hollow part 28 of the pedestal 12 and all of the hollow part 30 of the central part 22, a part of the annular part 20 of the footing,
The bottom of the center part 22 and the lower end of the skirt 26 are
It lands on the bottom of the water defined by a sedimentary layer H of sludge, dust, algae debris, etc. At this time, a closed space 32 is formed around the footing 14, that is, the annular portion 20. In this example,
The closed space 32 is formed at a position approximately 120 m below the water surface.

第3図に示すフーチング14は、前記したように、環状
部20が脚柱12の軸線と直交して、また、中央部22
が共軸的に、それぞれ配置されているが、第4図に示す
ように、環状部20および中央部22をこれらが共に脚
柱12の軸線と角度をなして交差するように、すなわち
、前記海底と乎行となるように配置することができる。
As described above, the footing 14 shown in FIG.
are arranged coaxially, respectively, but as shown in FIG. It can be placed in line with the ocean floor.

第4図に示す例では、スカート26が中央部22ととも
に環状部20と一体に形成され、これらの王者の下端す
なわち底部がほぼ同一の平面上に位置している。また、
第5図に示すフーチング14は、その環状部20が円形
ではなく四角形の断面を有し、スカート26が、第4図
の例と同様、環状部20と一体に形成されている。スカ
ート26の下端が、第4図の例と異なり、環状部20お
よび中央部22の同一の平面上にある底部より下方に位
置する。
In the example shown in FIG. 4, the skirt 26 is formed integrally with the annular portion 20 as well as the center portion 22, and the lower ends or bottoms of these two sides are located on substantially the same plane. Also,
In the footing 14 shown in FIG. 5, the annular portion 20 thereof has a rectangular cross section rather than a circle, and the skirt 26 is formed integrally with the annular portion 20, as in the example shown in FIG. Unlike the example of FIG. 4, the lower end of the skirt 26 is located below the bottoms of the annular portion 20 and the central portion 22, which are on the same plane.

フーチングの環状部20に、密閉空間32の内部と外部
すなわち前記外界とを連通させる第1の連通手段34が
設けられ、また、フーチングの中央部および脚柱12丙
に、密閉空間32と脚柱12の中空部28とを連通させ
る第2の連通手段36が配置されている。
The annular portion 20 of the footing is provided with a first communication means 34 that communicates the inside of the closed space 32 with the outside, that is, the outside world, and the central portion of the footing and the pedestal 12 are provided with a first communication means 34 that communicates between the closed space 32 and the pedestal. A second communication means 36 is arranged to communicate with the hollow portions 28 of 12.

第1の連通手段34は、フーチングの環状部20の内部
から外部である前記外界に伸びる管34aと、線管に連
通しかつ環状部20内をその周方向へ伸びるリング状の
第1の分岐管34bと、該第1の分岐管に連通しかつ環
状部20の前記底・部で開口する複数の第2の分岐管3
4cとから成る。管34a8よび第2の分岐管34cは
第1の分岐管34bの周方向に間隔をおいて複数個設け
ることができる。
The first communication means 34 includes a pipe 34a extending from the inside of the annular part 20 of the footing to the outside, and a ring-shaped first branch that communicates with the wire pipe and extends inside the annular part 20 in the circumferential direction. A pipe 34b and a plurality of second branch pipes 3 communicating with the first branch pipe and opening at the bottom portion of the annular portion 20.
4c. A plurality of pipes 34a8 and second branch pipes 34c can be provided at intervals in the circumferential direction of the first branch pipe 34b.

他方、第2の連通手段36は、バラスト用水Bの水面よ
り上方において中空部分28で開口する上端と、中空部
分28および中央部22の中空部分30を経て下方へ伸
びかつ中央部22の底部で開口する下端とを有する管3
6aから成る。
On the other hand, the second communication means 36 has an upper end that opens at the hollow portion 28 above the water surface of the ballast water B, and extends downward through the hollow portion 28 and the hollow portion 30 of the central portion 22 and opens at the bottom of the central portion 22. a tube 3 having an open lower end;
Consisting of 6a.

管34aの前記外界に突出する上端近傍と、管36aの
上端近傍とには、バルブ38.40を設けることが望ま
しい。
It is desirable to provide valves 38 and 40 near the upper end of the tube 34a that projects to the outside and near the upper end of the tube 36a.

前記海底近傍における密閉空間32の内外の水圧は、中
空部分28内の大気圧にほぼ等しい圧力より高い、この
ことから、両バルブ38.40を開けば、前記外界の水
が管34a、第1および第2の分岐管34b、34cを
通って密閉空間32内に流入する。このとき、堆積層H
に向けて流入する水によって堆8I層Hが撹乱され、こ
の撹乱によって堆積層Hを構成する成分が水と混合する
。水と混合した前記成分は管36aを経て脚柱12の中
空部分28に運ばれる。なお、着底時に、管36aの下
方の開口への堆積層Hの成分の侵入を防止するために、
遠隔的に取り外し操作可能の遮蔽板41を中央部22の
底部に配置しておくことが好ましい。
The water pressure inside and outside the sealed space 32 near the seabed is higher than the pressure approximately equal to the atmospheric pressure inside the hollow portion 28. Therefore, when both valves 38 and 40 are opened, water from the outside world flows into the pipe 34a and the first and flows into the closed space 32 through the second branch pipes 34b and 34c. At this time, the deposited layer H
The sediment layer H is disturbed by the water flowing toward the sediment layer H, and the components constituting the sediment layer H are mixed with the water due to this disturbance. Said components mixed with water are conveyed to the hollow part 28 of the pedestal 12 via the tube 36a. In addition, in order to prevent the components of the deposited layer H from entering the lower opening of the tube 36a when landing on the bottom,
Preferably, a remotely removable shielding plate 41 is arranged at the bottom of the central part 22.

このような一連の動作は、密閉空間32の内外の圧力と
中空部分28内の圧力との差を利用して行なわれるため
に動力は全く必要でなく、前記動作はパルプ38.40
の少なくとも一方を閉じることにより停止させることが
できる。
Such a series of operations is performed using the difference between the pressure inside and outside the closed space 32 and the pressure inside the hollow portion 28, so no power is required at all.
It can be stopped by closing at least one of them.

このようにして、フーチング14下の堆aWHを除去す
ることにより′、その除去の間、フーチング14したが
って水上作業台10が徐々に下降する。四つのフーチン
グ14の下降速度が異なると)・“・)、1よ、おゎア
。、)第、および第。つ連通手段、関して前記両バルブ
の一方または双方を閉じあるいは開度を調整することに
より第1および第2の連通手段34.36内の水の流れ
を一時的に停止しあるいは流量を調節する。これにより
前記下降速度を調整し、前記下降速度の相違によって生
じる水上作業台10の傾きを直すことができる。
By removing the sediment aWH under the footing 14 in this manner, the footing 14 and therefore the floating platform 10 are gradually lowered during its removal. When the lowering speeds of the four footings 14 are different, one or both of the valves are closed or the opening degree is adjusted with respect to the first and second communication means. By doing so, the flow of water in the first and second communication means 34, 36 is temporarily stopped or the flow rate is adjusted.Thereby, the lowering speed is adjusted, and the floating platform caused by the difference in the lowering speed is 10 can be corrected.

脚柱12の中空部分28内に貯留される水と堆積層Hの
成分との混合物は、中空部分28内のバラスト用水Bの
水面の上方に配置されたスラリーポンプ42および該ポ
ンプに接続されかつ作業甲板16に伸びるホース44を
介して排出することができる。また、スラリーポンプに
代えてこれを水中ポンプとすれば、堆積層Hの前記成分
を中空部分28.30内に歿して水のみを排出すること
ができる。これにより、バラスト用水の水位を一定に維
持することができる。なお、管36a内の一流量とホー
ス44内の流量とを同量にすることが、IP36a内の
流速を一定に保つ上で望ましい、また、管38aは、そ
の上端がフーチングの中央部22の中空部分30または
脚柱12の中空      1部分28において前記バ
ラスト用水中で開口するように配置してもよい、但し、
この場合には、バラスト用水の水圧が負荷されるために
tr!36a内の流速が低下することがある。さらに、
管36aの前記上端を環状部20の中空部分に開口させ
てもよい、この場合、前記のようなポンプを環状部20
の前記中空部分に配置することは言うまでもない。
The mixture of water stored in the hollow part 28 of the pedestal 12 and the components of the deposited layer H is produced by a slurry pump 42 arranged above the water surface of the ballast water B in the hollow part 28 and connected to the pump. It can be drained via a hose 44 extending to the working deck 16. Furthermore, if a submersible pump is used instead of the slurry pump, the components of the deposited layer H can be evacuated into the hollow portion 28, 30, and only water can be discharged. Thereby, the water level of the ballast water can be maintained constant. Note that it is desirable to make the flow rate in the pipe 36a and the flow rate in the hose 44 the same in order to keep the flow velocity in the IP 36a constant. The hollow portion 30 or the hollow portion 28 of the pedestal 12 may be arranged to open into the ballast water; however,
In this case, the water pressure of the ballast water is loaded, so tr! The flow rate within 36a may be reduced. moreover,
The upper end of the tube 36a may be opened into the hollow portion of the annular portion 20. In this case, the pump as described above may be inserted into the annular portion 20.
Needless to say, it is placed in the hollow portion of the.

こうして、フーチング14が4a!Hの深い位置または
堆積層H下の岩盤まで到達し、これにより、水上作業台
10が極めて安定した状態で設置される。
In this way, the footing 14 is 4a! It reaches the deep position of H or the bedrock below the sedimentary layer H, and as a result, the floating work platform 10 is installed in an extremely stable state.

ところで、堆a暦Hの性状によっては、着底時、スカー
ト26が堆積層H中に埋没してその内部が堆積層Hの成
分で充填される場合がある。このような場合、WSlの
連通手段34と第2の連通手段36との間での水あ流動
抵抗が極めて大きくなり、水が円滑に流動しないおそれ
がある。
By the way, depending on the properties of the sediment layer H, the skirt 26 may be buried in the sediment layer H and the inside thereof may be filled with components of the sediment layer H when the skirt 26 reaches the bottom. In such a case, the water flow resistance between the WSL communication means 34 and the second communication means 36 becomes extremely large, and there is a possibility that the water will not flow smoothly.

このため、脚柱12の内部を経てフーチング14に伸び
る高圧水供給管が配Eされ、また、該高圧水供給管と連
通する複数の噴口がフーチング14の底部に設けられて
いる。前記高圧水供給管は、その一端が、作業甲板16
上に配置された高圧水供給源(図示せず)に接続されて
いる。
For this purpose, a high-pressure water supply pipe extending to the footing 14 through the interior of the pedestal 12 is arranged E, and a plurality of nozzles communicating with the high-pressure water supply pipe are provided at the bottom of the footing 14. The high pressure water supply pipe has one end connected to the work deck 16.
connected to a high pressure water supply (not shown) located above.

第3図の例では、一対の高圧水供給管46の他端部46
aがそれぞれ環状部20と中央部22との境壁を貫通し
て環状部20内に伸び、該環状部の底部内面に沿って湾
曲している。他方、環状部20の底部にはその外面で開
口する複数の噴口48aが形成されている。高圧水供給
管の他端部46aには複数の噴口48aと整合する複数
の孔(図示せず)が設けられている。また4−木の高圧
水供給管47の他端部から分岐した湾曲する分岐管47
aが中央部22の閉塞底部の内面に沿って配置されてい
る0分岐管47aにも、中央部22の底部外面に開口す
る複数の噴口48bに整合する複数の孔(図示せず)が
設けられている。
In the example of FIG. 3, the other end 46 of the pair of high-pressure water supply pipes 46
a extends into the annular portion 20 through the boundary wall between the annular portion 20 and the central portion 22, and is curved along the bottom inner surface of the annular portion. On the other hand, a plurality of nozzles 48a are formed at the bottom of the annular portion 20 and open at the outer surface thereof. The other end 46a of the high-pressure water supply pipe is provided with a plurality of holes (not shown) that align with the plurality of jet ports 48a. 4-A curved branch pipe 47 branched from the other end of the wooden high-pressure water supply pipe 47
The zero-branch pipe 47a, which is disposed along the inner surface of the closed bottom of the central portion 22, is also provided with a plurality of holes (not shown) that align with the plurality of nozzles 48b opening on the outer surface of the bottom of the central portion 22. It is being

前記噴口48a、48bは、これらの中心が、例えば第
2の分岐管34cおよび管36aの開口中心を含みかつ
該脚柱に沿う面内にあるように配置することができる。
The nozzles 48a, 48b can be arranged such that their centers lie within a plane that includes, for example, the opening centers of the second branch pipe 34c and the pipe 36a and that extends along the pillar.

これにより、噴口48a。As a result, the nozzle 48a.

48bから高圧水を噴出させるとき、堆u!L層Hに溝
状の密閉空間(図示せず)を形成することができ、第2
の分岐管34cから水が前記溝状の空間に向けて導入さ
れることになる。その結果、前記密閉空間が拡大され1
円滑な水の流動に伴なう堆積層Hの撹乱および排出が実
現される。前記噴口がスカート26によって規定される
範囲内で開口するようにその配置位置が設定されること
は言うまでもないが、前記範囲内で不規則的に配置する
こともできる。
When high-pressure water is spouted from 48b, the pile u! A groove-shaped sealed space (not shown) can be formed in the L layer H, and a second
Water is introduced into the groove-shaped space from the branch pipe 34c. As a result, the sealed space is expanded and 1
Disturbance and discharge of the deposited layer H due to smooth water flow is realized. It goes without saying that the nozzle openings are arranged so that they open within the range defined by the skirt 26, but they can also be arranged irregularly within the range.

第4図の例では、一対の高圧水供給管46およびこれに
対応する噴口48aに関しては第3図に示す例と同様で
あるが、高圧水供給管47については、平坦な底部を有
する中央部22の前記底部の内面に従って非湾曲の分岐
管47aが配置されている。
In the example shown in FIG. 4, the pair of high-pressure water supply pipes 46 and the corresponding spout 48a are the same as the example shown in FIG. 3, but the high-pressure water supply pipe 47 has a central portion with a flat bottom. A non-curved branch pipe 47a is arranged along the inner surface of the bottom portion of the pipe 22.

また、第5図に示す例では、高圧水供給管50はほぼ直
角に折れ曲がって直線的に伸びる他端部j・□fi  
     50aを有し、該他端部は、フーチングの中
央部22からその回りの環状部20へ向けてこれらの底
部内に埋め込まれている。他端部50aには、中央部2
2および環状部20の底部外面に開口する複数の噴口5
2と整合する孔(図示せず)が設けられている°。
In addition, in the example shown in FIG. 5, the high-pressure water supply pipe 50 is bent at an almost right angle and extends linearly at the other end j.□fi.
50a, the other end of which is embedded in the bottom of the footings from the central part 22 to the annular part 20 around it. The other end 50a has a central portion 2.
2 and a plurality of nozzles 5 opening on the bottom outer surface of the annular portion 20
A hole (not shown) aligned with 2° is provided.

また、前記したような高圧水供給機構によれば、第1の
連通手段34のバルブ38を閉じかつ第2の連通手段3
6のバルブ40を開いた状態にして高圧水を堆積層Hに
向けて噴射することにより、堆積RHを撹乱することが
できる。高圧水を密閉空間32内に導入することにより
該空間の圧力が上昇し、その結果、撹乱された堆積MH
の成分が高王水とともに管36&を経て密閉空間32内
から排出される。
Further, according to the high-pressure water supply mechanism as described above, the valve 38 of the first communication means 34 is closed and the second communication means 34 is closed.
By opening the valve 40 of No. 6 and injecting high-pressure water toward the deposited layer H, the deposited layer RH can be disturbed. By introducing high-pressure water into the closed space 32, the pressure in the space increases, and as a result, the disturbed deposited MH
The components together with high aqua regia are discharged from the closed space 32 through the pipe 36&.

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

第1図は本発明に係る水上作業台の正面図、第2図は第
1図の線2−2に沿って得た横断面図、第3図は脚柱、
フーチングおよびスカートの部分拡大断面図、第4図お
よび!s5図は、それぞれ、フーチングおよびスカート
の他の例を示す第2図と同様の部分拡大断面図である。 LO:水上作業台、  12:脚柱、 14;フーチング、  16コ作業甲板、20 、22
 :フーチングの環状部および中央部、26:スカート
、   2B、30:中空部分。 32:v、閉空間、   34:第1の連通手段。 34a、34b、34c:管、第1の分岐管オヨびfJ
J2の分岐管、 36:第2の連通手段、 36a:管。 38 、40 :バルブ、 46.47,50;高圧水供給管、 48a、48b、52:噴口。 代理人 弁理士 松 永 宜 行 第1図 第2図 I4 第4図 第5図
FIG. 1 is a front view of a floating work platform according to the present invention, FIG. 2 is a cross-sectional view taken along line 2-2 in FIG. 1, and FIG. 3 is a pedestal,
Partially enlarged sectional view of the footing and skirt, Figure 4 and! Figure s5 is a partially enlarged sectional view similar to Figure 2, showing other examples of the footing and skirt, respectively. LO: floating work platform, 12: pedestal, 14; footing, 16 work deck, 20, 22
: Annular part and center part of footing, 26: Skirt, 2B, 30: Hollow part. 32: v, closed space; 34: first communication means. 34a, 34b, 34c: pipe, first branch pipe fJ
J2 branch pipe, 36: second communication means, 36a: pipe. 38, 40: Valve, 46.47, 50; High pressure water supply pipe, 48a, 48b, 52: Spout. Agent Patent Attorney Yoshi Matsunaga Figure 1 Figure 2 I4 Figure 4 Figure 5

Claims (4)

【特許請求の範囲】[Claims] (1)複数の脚柱および各脚柱に取り付けられかつ水底
に着底されるフーチングであって少なくとも一方が中空
部分を有する脚柱およびフーチングと、前記脚柱により
水上に支持される作業甲板と、前記脚柱またはフーチン
グを取り巻いて設けられ、着底時に前記脚柱またはフー
チングの回りに密閉空間を規定するスカートと、前記密
閉空間の内部と外部とを連通させる第1の連通手段と、
前記密閉空間と前記中空部分とを連通させる第2の連通
手段とを備える、水上作業台。
(1) A plurality of pedestals and footings that are attached to each pedestal and rest on the bottom of the water, at least one of which has a hollow portion, and a work deck that is supported on the water by the pedestals. , a skirt that is provided surrounding the pedestal or footing and defines an enclosed space around the pedestal or footing when bottoming out, and first communication means that communicates between the inside and the outside of the enclosed space;
A floating work platform, comprising: second communication means for communicating the closed space and the hollow portion.
(2)前記第1の連通手段および前記第2の連通手段に
、それぞれ、バルブが設けられている、特許請求の範囲
第(1)項に記載の水上作業台。
(2) The floating work platform according to claim (1), wherein the first communication means and the second communication means are each provided with a valve.
(3)前記フーチングは中空の環状部と、該環状部に取
り囲まれかつこれと一体に形成された、前記脚柱に連な
る中央部とから成り、前記第1の連通手段は、前記環状
部の内部から外部に伸びる管と、該管に連通しかつ前記
環状部内をその周方向へ伸びる第1の分岐管と、該第1
の分岐管に連通しかつ前記環状部の底部で開口する複数
の第2の分岐管とから成り、また、前記第2の連通手段
は前記中空部分で開口する一端と、前記中央部の底部で
開口する他端とを有する管から成る、特許請求の範囲第
(1)項に記載の水上作業台。
(3) The footing consists of a hollow annular part and a central part surrounded by and integrally formed with the annular part and connected to the pillar, and the first communication means is connected to the annular part. a pipe extending from the inside to the outside; a first branch pipe communicating with the pipe and extending in the circumferential direction within the annular portion;
and a plurality of second branch pipes that communicate with the branch pipes and open at the bottom of the annular part, and the second communication means has one end that opens in the hollow part and a plurality of second branch pipes that open at the bottom of the central part. The floating work platform according to claim 1, comprising a tube having the other end open.
(4)複数の脚柱および各脚柱に取り付けられかつ水底
に着底されるフーチングであって少なくとも一方が中空
部分を有する脚柱およびフーチングと、前記脚柱により
水上に支持される作業甲板と、前記脚柱またはフーチン
グを取り巻いて設けられ、着底時に前記脚柱またはフー
チングの回りに密閉空間を規定するスカートと、前記密
閉空間の内部と外部とを連通させる第1の連通手段と、
前記密閉空間と前記中空部分とを連通させる第2の連通
手段と、高圧水供給源に接続され、前記脚柱の内部を経
て前記フーチングに伸びかつ前記フーチングの底部に設
けられた複数の噴口と連通する高圧水供給管とを備える
、水上作業台。
(4) A plurality of pedestals and footings that are attached to each pedestal and rest on the bottom of the water, at least one of which has a hollow portion, and a work deck that is supported on the water by the pedestals. , a skirt that is provided surrounding the pedestal or footing and defines an enclosed space around the pedestal or footing when bottoming out, and first communication means that communicates between the inside and the outside of the enclosed space;
a second communication means for communicating the closed space and the hollow portion; and a plurality of spouts connected to a high-pressure water supply source, extending through the interior of the pedestal to the footing, and provided at the bottom of the footing. A floating work platform equipped with a communicating high-pressure water supply pipe.
JP22679884A 1984-10-30 1984-10-30 Off-shore working platform Granted JPS61106815A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP22679884A JPS61106815A (en) 1984-10-30 1984-10-30 Off-shore working platform
CN85104936A CN85104936B (en) 1984-10-30 1985-06-27 Pier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22679884A JPS61106815A (en) 1984-10-30 1984-10-30 Off-shore working platform

Publications (2)

Publication Number Publication Date
JPS61106815A true JPS61106815A (en) 1986-05-24
JPH0121284B2 JPH0121284B2 (en) 1989-04-20

Family

ID=16850778

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22679884A Granted JPS61106815A (en) 1984-10-30 1984-10-30 Off-shore working platform

Country Status (2)

Country Link
JP (1) JPS61106815A (en)
CN (1) CN85104936B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015126237A1 (en) * 2014-02-20 2015-08-27 Otm Solution Sdn Bhd Offshore support structure and methods of installation

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105002875B (en) * 2015-08-07 2017-01-25 江苏蓝潮海洋风电工程建设有限公司 High-pressure flushing device for offshore platform pile leg

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015126237A1 (en) * 2014-02-20 2015-08-27 Otm Solution Sdn Bhd Offshore support structure and methods of installation

Also Published As

Publication number Publication date
CN85104936B (en) 1988-10-26
CN85104936A (en) 1986-04-10
JPH0121284B2 (en) 1989-04-20

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