JPS636687B2 - - Google Patents

Info

Publication number
JPS636687B2
JPS636687B2 JP15419380A JP15419380A JPS636687B2 JP S636687 B2 JPS636687 B2 JP S636687B2 JP 15419380 A JP15419380 A JP 15419380A JP 15419380 A JP15419380 A JP 15419380A JP S636687 B2 JPS636687 B2 JP S636687B2
Authority
JP
Japan
Prior art keywords
storage tank
sea
marine platform
wall
berth
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
JP15419380A
Other languages
Japanese (ja)
Other versions
JPS5777710A (en
Inventor
Kenro Tomonaga
Haruo Yamamoto
Masamichi Yasunori
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.)
Kajima Corp
Original Assignee
Kajima 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 Kajima Corp filed Critical Kajima Corp
Priority to JP15419380A priority Critical patent/JPS5777710A/en
Publication of JPS5777710A publication Critical patent/JPS5777710A/en
Publication of JPS636687B2 publication Critical patent/JPS636687B2/ja
Granted legal-status Critical Current

Links

Description

【発明の詳細な説明】 本発明は、海中に没する貯槽及び海面上方に位
置するデツキを有する海洋プラツトホームの接舷
構造に関する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a berth structure for a marine platform having a storage tank submerged in the sea and a deck located above the sea surface.

海底油田から採取した原油を一時貯蔵するた
め、採油やぐら用のプラツトホームと一体に貯槽
を設けたものが使われている。油井位置の海が深
い場合には、貯槽が海中に没するのが普通であ
り、デツキは支柱により海中構造物に支持され
る。従来のこの種のプラツトホームにおいては、
貯槽の保護等のため、鉛を直接接舷させずヘリコ
プターによりデツキと船との間を往復するなどの
方法がとられていた。ヘリコプター利用の場合に
は、プラツトホームにヘリポートが必須となつて
コスト高となるのみならず、ヘリコプターに事故
が生ずると火災発生のおそれもあつた。
In order to temporarily store crude oil extracted from offshore oil fields, a storage tank is used that is integrated with the platform for the oil extraction tower. If the sea where the oil well is located is deep, the storage tank is usually submerged under the sea, and the deck is supported by an underwater structure using struts. In conventional platforms of this kind,
In order to protect the storage tanks, methods such as helicopters being used to shuttle the lead between the deck and the ship were used instead of bringing the lead directly aboard. When a helicopter is used, a helipad is required on the platform, which not only increases costs, but also poses a risk of fire if an accident occurs with the helicopter.

また、比較的浅い海底に支持される貯槽の場合
に、貯槽が方形等の角形であれば接舷構造を設け
易いが、貯槽が垂直円筒形である場合には接舷が
困難で不便であつた。
In addition, in the case of a storage tank supported on a relatively shallow seabed, it is easy to install a berthing structure if the tank is rectangular or other rectangular, but if the tank is vertically cylindrical, it is difficult and inconvenient to berth the tank. Ta.

従つて、本発明の目的は従来技術における上記
問題点を解決するにある。この目的を達成するた
め、本発明による海洋プラツトホームの接舷構造
は、その海洋プラツトホームの貯槽をバラスト室
がある二重壁で囲み、その二重壁から接舷柱を海
面まで延在させ、その接舷柱の海面部分に防舷材
を取付けて形成される。
Therefore, an object of the present invention is to solve the above-mentioned problems in the prior art. To achieve this objective, the berth structure of a marine platform according to the present invention surrounds the storage tank of the marine platform with a double wall in which the ballast chamber is located, and extends the berth pillar from the double wall to the sea surface, It is formed by attaching fender material to the sea surface part of the fender post.

以下添付図を参照して本発明の実施例を説明す
る。第1図及び第2図は、本発明を実施した海洋
プラツトホームの立面図及び平面図であり、第3
図は第2図の線−における縦断面図、第4図
は第3図の線−における横断面図である。図
示された海洋プラツトホーム10は、外周壁11
aが方形である海中構造部分11、その海中構造
部分11の頂部から海面上方へ延在する支柱1
2、及びその支柱12の上端に固着されたデツキ
13を有する。図中LWLは、低水位面に相当す
る海面を、Eは海底を示す。
Embodiments of the present invention will be described below with reference to the accompanying drawings. Figures 1 and 2 are an elevation view and a plan view of a marine platform on which the present invention is implemented;
The figure is a longitudinal sectional view taken along the line - of FIG. 2, and FIG. 4 is a cross sectional view taken along the line - of FIG. 3. The illustrated marine platform 10 has an outer peripheral wall 11
A is a rectangular underwater structure portion 11, and a support 1 extending above the sea surface from the top of the underwater structure portion 11.
2, and a deck 13 fixed to the upper end of the support column 12. In the figure, LWL indicates the sea surface corresponding to the low water level, and E indicates the seabed.

海中構造部分11の底面の主要部は二重殻底部
14によつて構成される。二重殻底部14は、ベ
ースコンクリート層14a、そのベースコンクリ
ート層へ相互に間隔をおいて固着された複数のプ
レキヤスト部材14b、及びそのプレキヤスト部
材と一体に固着された内側底壁14cからなる。
この二重殻底部14は、高い保温性及び遮水性を
有する。
The main part of the bottom surface of the underwater structure part 11 is constituted by the double shell bottom part 14. The double shell bottom 14 consists of a base concrete layer 14a, a plurality of precast members 14b fixed to the base concrete layer at intervals, and an inner bottom wall 14c fixed integrally with the precast members.
This double-shelled bottom portion 14 has high heat retention and water-blocking properties.

図示例の海洋プラツトホーム10は4つの貯槽
15を有し、これらの貯槽15の側壁16は二重
殻底部14の上方に延在する。貯槽15は、方形
周囲壁11aの中心Oに関して対称に配置され、
その頂部はプレキヤストドーム等のコンクリート
蓋17で覆われる。
The illustrated marine platform 10 has four reservoirs 15 whose side walls 16 extend above the double-shell bottom 14 . The storage tank 15 is arranged symmetrically with respect to the center O of the rectangular surrounding wall 11a,
Its top is covered with a concrete lid 17 such as a precast dome.

方形外周壁11aとこれらの貯槽15との間に
は、構造壁18が外周壁11aの各辺と平行に形
成され、海中構造部分11が補強される。図示例
においては、貯槽15相互間にも構造壁18が設
けられる。方形外周壁11aの上端と前記コンク
リート蓋17との間の開放部分をバラスト室蓋1
9で覆う。また、方形外周壁11aの下端と前記
二重殻底部14の周囲との間にバラスト室底壁2
0を形成し、バラスト室21を画成する。バラス
ト室21には砂などを詰め、海洋プラツトホーム
10を海底E(第1図)に据付ける。上記外周壁
11aとこれに平行する構造壁18とは、貯槽1
5を囲むバラスト室21がある二重壁を構成して
いる。
A structural wall 18 is formed between the rectangular outer peripheral wall 11a and these storage tanks 15 in parallel to each side of the outer peripheral wall 11a, and the underwater structural portion 11 is reinforced. In the illustrated example, structural walls 18 are also provided between the storage tanks 15. The open part between the upper end of the square outer peripheral wall 11a and the concrete lid 17 is connected to the ballast chamber lid 1.
Cover with 9. Further, a ballast chamber bottom wall 2 is provided between the lower end of the square outer peripheral wall 11a and the periphery of the double shell bottom 14.
0 and defines a ballast chamber 21. The ballast chamber 21 is filled with sand, etc., and the marine platform 10 is installed on the seabed E (Fig. 1). The outer peripheral wall 11a and the structural wall 18 parallel to the outer peripheral wall 11a are the storage tank 1
5 constitutes a double wall with a ballast chamber 21 surrounding it.

第1図及び第2図に示すように、本発明によれ
ば、この外周壁11a及び構造壁18からなる二
重壁の頂部から2本の接舷柱22を海面LWL上
まで延在させる。好ましくは、接舷柱22の上端
は最高海水位においても海面上に突出する。2本
の接舷柱22に同一平面上にある垂直外側部分2
2aを設け、各接舷柱22のこの部分22aの海
面と接する位置に防舷材23を取付ける。図示例
では、この防舷材23を取付ける面が海中構造部
分の外周壁11aの外面と同一平面上にあるが、
船24(第5図)のいかなる部分も海中構造部分
11と接触しないようにすることができれば、防
舷材23の取付け面は必ずしも外周壁11aの外
側面と一致しなくてもよい。
As shown in FIGS. 1 and 2, according to the present invention, two berth posts 22 are extended from the top of the double wall made up of the outer peripheral wall 11a and the structural wall 18 to above the sea level LWL. Preferably, the upper end of the berth post 22 protrudes above the sea level even at the highest sea level. Vertical outer portion 2 coplanar with the two abutment posts 22
2a, and a fender 23 is attached to a position where this portion 22a of each fender post 22 contacts the sea surface. In the illustrated example, the surface on which this fender 23 is attached is on the same plane as the outer surface of the outer peripheral wall 11a of the underwater structure part,
As long as it is possible to prevent any part of the ship 24 (FIG. 5) from coming into contact with the underwater structure portion 11, the mounting surface of the fender 23 does not necessarily have to coincide with the outer surface of the outer peripheral wall 11a.

第5図に示すように、上記構成を有すぬ接舷構
造によれば、タンカーなどの船24が直接に海洋
プラツトホーム10に接舷することができる。好
ましくは、ムアリングブイ25を海洋プラツトホ
ーム10に隣接して設け、ロープ26aにより船
24をムアリングブイ25に係留し、さらにロー
プ26bにより船24を海洋プラツトホーム10
のデツキ13に固定されたロープ止め27を介し
て海洋プラツトホーム10へ引き寄せておく。ム
アリングブイ25は、接舷が予想される船24の
中心線Cと上記ロープ26aとの間の角度がほぼ
45゜となる位置に設置するのが好ましく、この場
合には、船24、海洋プラツトホーム10、ロー
プ26a,26b、及びムアリングブイ25等に
作用する応力の最適調和が得られる。
As shown in FIG. 5, according to the berthing structure that does not have the above-mentioned configuration, a ship 24 such as a tanker can directly berth the marine platform 10. Preferably, a mooring buoy 25 is provided adjacent to the marine platform 10, the vessel 24 is moored to the mooring buoy 25 by a rope 26a, and the vessel 24 is moored to the marine platform 10 by a rope 26b.
It is pulled to the marine platform 10 via a rope stopper 27 fixed to the deck 13. The mooring buoy 25 is such that the angle between the center line C of the ship 24 expected to come alongside and the rope 26a is approximately
It is preferable to install it at an angle of 45°, in which case an optimum balance of the stresses acting on the ship 24, the offshore platform 10, the ropes 26a, 26b, the mooring buoy 25, etc. is obtained.

以上説明した本発明による海洋プラツトホーム
の接舷構造によつて得られる効果を列挙すれば次
の通りである。
The effects obtained by the above-described marine platform berth structure according to the present invention are listed below.

(1) 海洋プラツトホームへ船を直接に接舷させる
ことができるので、ヘリポート等の必要がなく
経済的であり、着桟の稼働率が一点係留方式な
どに比べて高い。
(1) Since the ship can be brought alongside directly to the marine platform, it is economical as there is no need for a helipad, etc., and the operating rate of berthing is higher than with single-point mooring methods.

(2) ヘリコプターを使用する場合の危険性を避け
ているので安全性が向上し、しかも船とプラツ
トホームとの間の往復が容易になる。
(2) Safety is improved since the dangers associated with using a helicopter are avoided, and transportation to and from the ship and platform is facilitated.

(3) 円形貯槽を有する海洋プラツトホームに対し
て接舷構造を設けることができる。
(3) A berth structure may be provided for offshore platforms with circular storage tanks.

(4) 貯槽周囲の二重壁をバラスト室壁としても使
用するので、バラストの使用により、貯槽にお
ける油水置換の必要性を除き、油槽における原
油保温を効果的に行なうことができる。
(4) Since the double wall around the storage tank is also used as a ballast chamber wall, the use of ballast eliminates the need for oil-water replacement in the storage tank and effectively retains the heat of the crude oil in the oil tank.

(5) デツキ支柱に対する船の衝突を防止すること
ができる。
(5) It is possible to prevent ships from colliding with the deck support.

(6) 構造が簡単で安価に建造することができる。(6) It has a simple structure and can be built at low cost.

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

第1図は本発明を実施した海洋プラツトホーム
の立面図、第2図はその平面図、第3図は第2図
の線−における縦断面図、第4図は第3図の
線−における横断面図、第5図は船の接舷を
示す平面図である。 10……海洋プラツトホーム、11a……外周
壁、13……デツキ、15……貯槽、18……構
造壁、21……バラスト室、22……接舷柱、2
3……防舷材、LWL……海面、E……海底。
Fig. 1 is an elevational view of a marine platform in which the present invention is implemented, Fig. 2 is a plan view thereof, Fig. 3 is a longitudinal sectional view along the line - of Fig. 2, and Fig. 4 is a longitudinal sectional view taken along the line - of Fig. 3. The cross-sectional view and FIG. 5 are plan views showing the ship alongside. DESCRIPTION OF SYMBOLS 10...Marine platform, 11a...Outer peripheral wall, 13...Deck, 15...Storage tank, 18...Structural wall, 21...Ballast room, 22...Flanking column, 2
3...Fender, LWL...Sea surface, E...Sea floor.

Claims (1)

【特許請求の範囲】[Claims] 1 海中に没する貯槽及び海面上方に位置するデ
ツキを有する海洋プラツトホームにおいて、その
貯槽をバラスト室がある二重壁で囲み、その二重
壁から接舷柱を海面まで延在させ、その接舷柱の
海面部分に防舷材を取付けてなる海洋プラツトホ
ームの接舷構造。
1. For offshore platforms with a storage tank submerged in the sea and a deck located above the sea surface, the storage tank is surrounded by a double wall with a ballast chamber, and a berth post extends from the double wall to the sea surface, A marine platform berthing structure consisting of fenders attached to the sea surface portion of pillars.
JP15419380A 1980-11-02 1980-11-02 Structure of off-shore platform mooring alongside ship Granted JPS5777710A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15419380A JPS5777710A (en) 1980-11-02 1980-11-02 Structure of off-shore platform mooring alongside ship

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15419380A JPS5777710A (en) 1980-11-02 1980-11-02 Structure of off-shore platform mooring alongside ship

Publications (2)

Publication Number Publication Date
JPS5777710A JPS5777710A (en) 1982-05-15
JPS636687B2 true JPS636687B2 (en) 1988-02-10

Family

ID=15578864

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15419380A Granted JPS5777710A (en) 1980-11-02 1980-11-02 Structure of off-shore platform mooring alongside ship

Country Status (1)

Country Link
JP (1) JPS5777710A (en)

Also Published As

Publication number Publication date
JPS5777710A (en) 1982-05-15

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