JPS6047111A - Construction of marine structure - Google Patents

Construction of marine structure

Info

Publication number
JPS6047111A
JPS6047111A JP15537083A JP15537083A JPS6047111A JP S6047111 A JPS6047111 A JP S6047111A JP 15537083 A JP15537083 A JP 15537083A JP 15537083 A JP15537083 A JP 15537083A JP S6047111 A JPS6047111 A JP S6047111A
Authority
JP
Japan
Prior art keywords
support leg
upper body
buoyancy
site
sea surface
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
JP15537083A
Other languages
Japanese (ja)
Inventor
Yoshiyasu Kawatsuji
川辻　良易
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 JP15537083A priority Critical patent/JPS6047111A/en
Publication of JPS6047111A publication Critical patent/JPS6047111A/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
    • E02B17/0034—Maintenance, repair or inspection of offshore constructions

Abstract

PURPOSE:To easily perform welding operations by a method in which the superstructure having a buoyancy of a marine structure and the upper part of bearing legs with auxiliary floats are towed on the sea and connected with each other on the site, and they are fixed to the lower part of the bearing legs set on the seabed while adjusting the buoyancy. CONSTITUTION:The superstructure 4 having a buoyancy is integrally built up in a shipyard. In this case, the upper part 6 of the upside portion of bearing legs having flanges 5 on their lower ends is integrally provided, and at the same time the lower part 9 of the upside portion of the bearing legs having flanges 7 and 8 on their upper and lower both ends is built with an auxiliary float 10. They are floated on the sea and towed to the site, and the lower part 9 of the upside portion of the bearing legs is settled into the sea by adjusting the buoyancy of the float 10 and the flanges 5 and 7 are connected. The superstructure 4 is lifted on the sea by adjusting the buoyancy of the float 10, and the flange 8 on the lower end of the upper part 3 of the bearing leg is connected with the flange 11 on the upper end of the lower part of the bearing leg set on the seabed in advance to construct a marine structure.

Description

【発明の詳細な説明】[Detailed description of the invention]

この発明は、海洋構造物の溝築方法、さらに訂しくは、
海底に設置されて海面上方に突出し７ｊ支持脚の上端部
に海面上方に位装置りる上部本体が固定された海洋構造
物を構築する方法に関りる。 この種の海洋（Ｍ造物は、従来、上部本体をパージにの
せて現地まで運搬し、予め海底に設置されている支持脚
上にクレーン船の海上クレーンで上部本体を搭載して両
者を同定することにより構築されている。ところが、海
上プラント１５石油掘削用の海洋構造物などの場合は、
上部本体の司法、ｍｆｆ１が非常に大きいため、これを
一体に建造して海上クレーンで一括して支持脚上に搭載
することは不可能であり、海上クレーンの能力に応じ上
部本体を比較的小型の複数のブロック（モジュール）に
分割して建造し、これらを下層のものから支持脚上に順
次搭載し、そののち各ブロック間の配管や配線などの接
続作業を行なっている。したがって、気象条件の厳しい
海上での搭載作業おＪ：び搭載後の接続作業の作業ｍが
多く、能率が悪いため、ＩＩυＪが長く費用が増大する
という問題がある。 この光明け、上記の問題を解決した合理的な海洋構造物
の構築方法を提供することを目的と覆る。 この発明にＪ：る方法は、支持脚を海面下所定深さの位
置で下側部分と上側部分に分割し、上部本体を海面に浮
かべて現地に曳航し、上部本体を現地に曳航したのちま
たはそれＪ、でに上部本体に支持脚上側部分を固定する
とともに支持脚上側部分に補助浮体を取付りた状態にし
ておき、補助浮体の浮力調節により上部本体を海面上方
に持上げて、海底に設置しておいた支持脚下側部分の上
方に支持脚上側部分がくるように補助浮体を移動さＵ、
補助浮体の浮ノｊを調節しながら支持脚上側部分を支持
脚下側部分に固定りることを特徴とＪ−るものである。 この発明によれば、海洋構造物を容易に構築リ−ること
かでき、従来のように海上クレーンを使用して支持脚上
に、上部本体を搭載する必要がない。したがって、大型
の海洋構造物であってし、海上クレーンの能力に関係な
く上部本体を管理の行届いた工場内で一体に建造りるこ
とがｉ−）能になるため、品質の高い海洋構造物を得る
ことができ、かつ上部本体の建造工期を短縮することが
できる。また、海上クレーンによる上部本体の搭載作業
が不要でｔＮ上での配色および配線などの接続作業が従
来に比べて大幅に減少するため、現地にＪ３りる工期を
短縮りることができ、建造工１１１Ｊのり、０縮と合わ
けて海洋構造物のコスｉ−ダウンが可能て゛ある。 以下図面を参照してこの発明の詳細な説明する。 海洋（ｆ１１造物の（１１１築に先立ら、支持脚（１）
を海面下所定深さの位置で下側部分（２）とに側部分（
３）に分割し、さらに上側部分（３）を上下２つに分割
しておく。なお、支持脚（１）の各部分は、中空のバイ
ブによってｌｒ４成される。 ぞして、まず、造船所で上部本体（４）を一体に建造し
、このとき、下端にフランジ（５）を備えた支持脚上側
部分上部（６）を上部本体（４）の下面に一体に設置ｊ
てＪ５＜。なお、上部本体（４）は、それ自イホ淫力を
右り−るものである。次に、上部本体（４）を海面に浮
かべ、これを現地に曳航する（第１図参照）。 これと同時に、上下両端にフランジ（７）（８）を備え
た支持脚上側部分下部（９）を建造し、これに浮力調節
可能な補助浮体（１０）をｉｌｌ＜　（Ｊけておく。そ
しＣ１これらを海面に浮かべ、上部本体（４）と別に現
地に曳航づる。 現地にＪ３いて、補助浮体（１０）の浮力調節に、Ｊこ
り支持脚上側部分下部（９）を海面下に沈め、これが上
部本１本（４）に固定された支持脚り側部分上部（６）
の真下にくるように補助浮体（１０）を移動させる。そ
して、補助浮体（１０）の浮力を調節しながら、支持脚
上側部分上部（６）下端のフランジ（５）と支持脚上側
部分下部（９）上端のフランジ（７）をポル１〜とナツ
トによって連結し、これにＪ：り支持脚上側部分（３）
の上部（６）と下部（９）を連結Ｊる（第２図参照）。 これによって、上部本体く／４）に支持脚上側部分（３
）を固定Ｊ−るとともにこの部分（３）に補助浮体（１
０）を取イ」りた状態になる。なＪ３、このような状態
にりる作業は、上部本体（４）を現地に曳航したのちま
たはそれまでの任意の段階で行なえばよい。りなわら、
支持脚上側部分下部（９）は、上部本体く／Ｉ）を建造
りるどきまたは上部本体（４）を海面に浮かべるときに
支持脚上側部分上部（６）に連結し−Ｃもよい。また、
支持脚上側部分下部（９）は、現地で建造してもＪ：い
。支持脚上側部分（３）は必ずしも−Ｌ下２つに分割Ｊ
る必要はなく、一体に建造した支持脚上側部分（３）を
、上部本体（４）を建造するとき、上部本体（４）を海
面に浮かべるとぎまたｔＪ：　’−ｌｘ部本体（４）だ
りを現地に曳航したのちに上部本体（４）゛に固定して
もよい。また、支持脚上側部分（３）を固定した上部本
体（４）を海面に浮かべて現地に曳航Ｊるような場合は
、現地にＪ３いて補助浮体く１０）を支持脚上側部分〈
３）に取付（プてもよいが、とくに上部本体（４）の淫
力が十分でないような場合は、上部本体（４）を海面に
浮かべるときまでに上部本体（４）に支持脚１側部分（
３）を固定するとともにこの部分（３）に補助浮体（１
（１）を取イ１This invention relates to a method for constructing trenches for offshore structures, and more particularly,
The present invention relates to a method of constructing a marine structure in which an upper body is installed on the seabed, protrudes above the sea surface, and has an upper body fixed to the upper end of the supporting legs 7j, the device resting above the sea surface. Conventionally, for this type of marine (M) structure, the upper body is placed on a purge and transported to the site, and the upper body is mounted with a marine crane of a crane ship on support legs that have been installed on the seabed in advance, and both are identified. However, in the case of offshore plants such as offshore structures for oil drilling,
Because the upper body's mff1 is extremely large, it is impossible to build it as one piece and mount it all at once on a support leg using a marine crane. It is constructed by dividing into multiple blocks (modules), which are sequentially mounted on support legs starting from the lowest layer, and then connections such as piping and wiring between each block are performed. Therefore, there is a problem that there is a lot of loading work at sea under severe weather conditions and connection work after loading, which is inefficient, resulting in a long IIυJ and increased costs. This breakthrough aims to provide a rational method of constructing marine structures that solves the above problems. The method according to this invention is to divide the support leg into a lower part and an upper part at a predetermined depth below the sea surface, float the upper body on the sea surface and tow it to the site, and then tow the upper body to the site. Alternatively, fix the upper part of the support leg to the upper body, and attach the auxiliary floating body to the upper part of the support leg, and lift the upper body above the sea surface by adjusting the buoyancy of the auxiliary floating body, and place it on the seabed. Move the auxiliary floating body so that the upper part of the support leg is above the lower part of the support leg that was installed,
The feature is that the upper part of the support leg is fixed to the lower part of the support leg while adjusting the floating height of the auxiliary floating body. According to the present invention, a marine structure can be easily constructed and there is no need to mount the upper body on the supporting legs using a marine crane as in the past. Therefore, even if it is a large offshore structure, it is possible to construct the upper body in one piece in a well-controlled factory regardless of the capacity of the offshore crane, so that high-quality offshore structures can be constructed. In addition, the construction period for the upper body can be shortened. In addition, there is no need to use a marine crane to mount the upper body, and connection work such as color arrangement and wiring on the tN is significantly reduced compared to the conventional method, which shortens the construction period required for on-site construction. It is possible to reduce the cost of marine structures by combining 111J glue and 0 shrinkage. The present invention will be described in detail below with reference to the drawings. Ocean (f11 structure (prior to the 111 construction, support legs (1)
The lower part (2) and the side part (
Divide into 3) and further divide the upper part (3) into upper and lower parts. Note that each part of the support leg (1) is formed by a hollow vibrator. Therefore, first, the upper body (4) is built integrally at a shipyard, and at this time, the upper part of the support leg (6) with the flange (5) at the lower end is integrally attached to the lower surface of the upper body (4). installed in
TeJ5<. Incidentally, the upper body (4) itself has great sexual power. Next, the upper body (4) is floated on the sea surface and towed to the site (see Figure 1). At the same time, construct the lower part (9) of the upper part of the support leg with flanges (7) and (8) at both the upper and lower ends, and attach the auxiliary floating body (10) whose buoyancy can be adjusted to this. C1 These are floated on the sea surface and towed to the site separately from the upper main body (4).J3 is at the site, and to adjust the buoyancy of the auxiliary floating body (10), sink the lower part of the upper part of the J stiff support leg (9) below the sea surface, This is the upper part (6) of the support leg side fixed to one upper book (4)
Move the auxiliary floating body (10) so that it is directly below. Then, while adjusting the buoyancy of the auxiliary floating body (10), the flange (5) at the lower end of the upper part of the support leg (6) and the flange (7) at the upper end of the lower part of the support leg upper part (9) are connected with the poles 1 to 1 and nuts. Connect to this and attach the upper part of the support leg (3)
Connect the upper part (6) and lower part (9) of the (see Figure 2). This allows the upper part of the support leg (3) to be attached to the upper body part (4).
) is fixed and the auxiliary floating body (1) is attached to this part (3).
0). J3, work to bring the vessel into such a state may be carried out after the upper body (4) is towed to the site or at any stage before that. Rinawara,
The lower part of the upper part of the support leg (9) may be connected to the upper part of the upper part of the support leg (6) when the upper body (I) is constructed or when the upper body (4) is floated on the sea surface. Also,
The lower part of the upper part of the support leg (9) may be constructed on site. The upper part of the support leg (3) is not necessarily divided into two parts below -LJ
When constructing the upper body (4), it is not necessary to use the upper part (3) of the support leg built as one piece, to float the upper body (4) on the sea surface. may be towed to the site and then fixed to the upper body (4). In addition, if the upper body (4) to which the upper part of the support leg (3) is fixed is floated on the sea surface and towed to the site, the auxiliary floating body 10) should be attached to the upper part of the support leg while at the site.
3), but if the upper body (4) does not have sufficient sexual power, attach it to the upper body (4) on the support leg 1 side before floating the upper body (4) on the sea surface. part(
3) and attach the auxiliary floating body (1) to this part (3).
Take (1) 1

【プた状態にづ−るのがよい。 一方、望ましくは上部本体（４）が現地に到ｒ３−Ｊる
までに、上端にフランジ（１１〉を倫えた支持脚下側部
分（２）を現地の海底に設置しておく。 そして、補助浮体（１０）の）′７カｉ１Ｙ　１ｉｉ４
により上部本体（４）を海面上方に持上げて、上部本体
（４）に固定された支持脚上側部分（３）が支持脚下側
部分（２）の真上にくるように補助浮体（１０）を移動
さけ、補助浮体（１０）の浮力を調節しながら、支持脚
上側部分（３）ゴ・端のフランジ（８）と支持脚下側部
分（２）上端のフランジ（１１）をポル１−とナラ１〜
によって連結し、これにより支持脚（１）の上側部分（
３）とＦ側部分（２）を連結する（　ｉ’！　３図参照
）。これによって、海底に設置されて海面上刃に突出し
た支持脚（１）の上端部に海面上方に位置する土部本体
（４）が固定された海洋１＋ｔｉ造物の主要部が完成す
る。 上記実施例の場合、支持脚（１）の各部分をフランジを
利用してポル１−とナラ１〜によって連結するので、次
のような利点がある。ずなわら、連結部がフランジ同志
の面接触になるため微調整もある程度可能であり、しか
もポル］−どナツトにＪ：って連粘り−るから、水中溶
接などに比べて作業が容易で、メンデナンス上も有利で
ある。 Ｊた、海底地盤の沈下などによる支持脚の十−ト位置の
ずれにヌｊしても、これが微少なものであれば、従来の
ように支持脚の一部を少し長めにイ′１つでおいてこれ
を適当な長さく高さ）に切断りるＪ：うな必要がなく、
フランジ相互間ｔこライノなどを挾むことによっ−Ｃ調
整することができる。さらに、将】ζ支持脚の高さをか
える必要がクニ己だような場合も、継足し、取外しが容
易で、容易に対処可能である。しかしながら、支持脚（
１）の各部分の連結は、上記実施例のものに限らない。[It is best to base it on the state of being held. On the other hand, preferably, before the upper body (4) reaches the site, the lower part of the support leg (2) with the flange (11>) on the upper end should be installed on the seabed at the site. (10)'7kaii1Y 1ii4
Lift the upper body (4) above the sea surface using While adjusting the buoyancy of the auxiliary floating body (10), move the upper part of the support leg (3) to the flange (8) at the end and the flange (11) at the upper end of the lower part of the support leg (2) to the pole 1- and the rear. 1~
by which the upper part of the support leg (1) (
3) and the F side part (2) (see Figure i'! 3). As a result, the main part of the marine 1+ti structure is completed, in which the soil part main body (4) located above the sea surface is fixed to the upper end of the support leg (1) installed on the seabed and protruding above the sea surface. In the case of the above embodiment, each part of the support leg (1) is connected by the pole 1- and the nail 1- using a flange, so there are the following advantages. Of course, since the connecting part is in surface contact between the flanges, it is possible to make fine adjustments to a certain extent, and since the connection is continuous and sticky, the work is easier compared to underwater welding etc. , it is also advantageous in terms of maintenance. In addition, even if there is a slight shift in the support leg position due to subsidence of the seabed, etc., if the shift is slight, it is possible to make a part of the support leg a little longer than before. Then cut it to an appropriate length and height.J: There is no need to cut it.
-C adjustment can be made by sandwiching a rhinoceros or the like between the flanges. Furthermore, even if it is necessary to change the height of the support legs, it is easy to add and remove them, making it easy to deal with the situation. However, supporting legs (
The connection of each part in 1) is not limited to that of the above embodiment.

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

第１図〜第３図はこの発明の実施例を工程順に示す正面
図である。 （１）・・・支持脚、（２）・・・支持脚下側部分、（
３）・・・支持脚上側部分、（４）・・・上部本体、（
１０）・・・補助浮体。 以　に 外４名1 to 3 are front views showing an embodiment of the present invention in the order of steps. (1)...Support leg, (2)...Lower part of support leg, (
3)...Upper part of support leg, (4)...Upper body, (
10)... Auxiliary floating body. and 4 other people

Claims (1)

【特許請求の範囲】[Claims] 海底に設置されて海面上方に突出した支持脚の上端部に
海面上方に位置づ−る上部本体が固定された海洋構造物
を（（１１築する方法であって、支持脚を海面下所定深
さの位置で下側部分と上側部分に分割し、上部本体を海
面に浮かべて現地に曳航し、上部本体を現地に曳航した
のちまたはそれまでに上部本体に支持脚上側部分を固定
するとともに支持脚上側部分に補助押体を取イ」（ノた
状態にしておき、補助浮体の浮力調節により上部本体を
海面上方に持上げて、海底に設置しておいた支持脚下側
部分の上方に支持脚上側部分がくるように２補助浮体を
移動させ、補助押体の）７カを調節しながら支持脚上側
部分を支持脚下側部分に固定することを特徴とする海洋
構造物の構築方法。A method for constructing a marine structure (11) in which an upper body located above the sea surface is fixed to the upper end of a support leg that is installed on the seabed and protrudes above the sea surface. The upper body is separated into a lower part and an upper part at a position of 1, and the upper body is floated on the sea surface and towed to the site, and after or before the upper body is towed to the site, the upper part of the support leg is fixed to the upper body and supported. Place the auxiliary support body on the upper part of the leg (leave it in the undone position), lift the upper body above the sea surface by adjusting the buoyancy of the auxiliary floating body, and attach the support leg above the lower part of the support leg installed on the seabed. A method for constructing a marine structure, which comprises moving two auxiliary floating bodies so that the upper part is located thereon, and fixing the upper part of the support leg to the lower part of the support leg while adjusting the force of the auxiliary pusher.
JP15537083A 1983-08-25 1983-08-25 Construction of marine structure Pending JPS6047111A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15537083A JPS6047111A (en) 1983-08-25 1983-08-25 Construction of marine structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15537083A JPS6047111A (en) 1983-08-25 1983-08-25 Construction of marine structure

Publications (1)

Publication Number Publication Date
JPS6047111A true JPS6047111A (en) 1985-03-14

Family

ID=15604441

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15537083A Pending JPS6047111A (en) 1983-08-25 1983-08-25 Construction of marine structure

Country Status (1)

Country Link
JP (1) JPS6047111A (en)

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