JPS6147926B2 - - Google Patents
Info
- Publication number
- JPS6147926B2 JPS6147926B2 JP57199309A JP19930982A JPS6147926B2 JP S6147926 B2 JPS6147926 B2 JP S6147926B2 JP 57199309 A JP57199309 A JP 57199309A JP 19930982 A JP19930982 A JP 19930982A JP S6147926 B2 JPS6147926 B2 JP S6147926B2
- Authority
- JP
- Japan
- Prior art keywords
- platform
- leg
- reinforcing beam
- attached
- view
- 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
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
- E02B17/02—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto
- E02B17/021—Artificial islands mounted on piles or like supports, e.g. platforms on raisable legs or offshore constructions; Construction methods therefor placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto with relative movement between supporting construction and platform
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
Description
【発明の詳細な説明】
本発明は、プラツトホームに複数本のレグ
（脚）を昇降可能に貫設してなる昇降式海上作業
台に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an elevating type offshore work platform having a plurality of legs installed through the platform so as to be able to move up and down.
第１図に従来例が略示されている。すなわち１
はプラツトホームで、複数本のレグ２を昇降可能
に貫設している。ここでレグ２は海底３に着地
し、そしてプラツトホーム１を海面４に対して上
方に持上げている。このような作業可能な状態に
おいて、稼動水深が深く（400′〜500′）なると、
構造物の固有周期が長く（5sec〜10sec）なり、
波の卓越周期と同調する危険性が増す。構造物が
波と同調すると、仮想線に示すようにプラツトホ
ーム１の水平変位（δ）が大きくなり、構造物が
不安定となるばかりでなく、各種作業にも支障を
きたすことになる。これを回避するには構造物の
固有周期を下げることが必要である。このための
方法として、(A)プラツトホーム１の重量を軽くす
ること、(B)レグ２の剛性を上げること、が考えら
れるが、このうち(A)は種々の機器類を搭載するた
め限界があり、また(B)はレグ２の大巾な重量増加
の割には効果が少ない。そこで全体の構造系を変
えて剛性を上げるのが効果的である。 A conventional example is schematically shown in FIG. i.e. 1
is a platform, and a plurality of legs 2 are installed through the platform so that it can be raised and lowered. Leg 2 has now landed on the seabed 3 and is lifting platform 1 above sea level 4. In such workable conditions, if the operating water depth is deep (400′ to 500′),
The natural period of the structure becomes longer (5 sec to 10 sec),
The risk of synchronization with the dominant wave period increases. When the structure synchronizes with the waves, the horizontal displacement (δ) of the platform 1 increases as shown by the imaginary line, which not only makes the structure unstable but also causes problems in various operations. To avoid this, it is necessary to lower the natural period of the structure. Possible methods for this are (A) reducing the weight of platform 1, and (B) increasing the rigidity of leg 2, but (A) has its limits because it is loaded with various equipment. Yes, and (B) has little effect considering the large weight increase of leg 2. Therefore, it is effective to increase the rigidity by changing the overall structural system.
本発明の目的とするところは、簡単な構造を付
加するのみで剛性を上げ得る昇降式海上作業台を
提供する点にある。 An object of the present invention is to provide an elevating type offshore work platform whose rigidity can be increased simply by adding a simple structure.
上記目的を達成するために本発明の昇降式海上
作業台は、プラツトホームの下面に補強梁を揺動
可能に取付け、この補強梁の遊端をレグに連結可
能に構成している。かかる構成によると、レグを
着地させ、そしてプラツトホームを所定レベルま
で上昇させたのち、補強梁の遊端をレグに連結す
ることによつて、この補強梁によりプラツトホー
ムとレグとを剛体化し得、以つて剛性を上げ得
る。 In order to achieve the above object, the elevating type offshore work platform of the present invention is configured such that a reinforcing beam is swingably attached to the lower surface of the platform, and the free end of this reinforcing beam can be connected to a leg. According to this configuration, after the leg has landed and the platform has been raised to a predetermined level, by connecting the free end of the reinforcing beam to the leg, the platform and the leg can be made rigid by the reinforcing beam, and the following can be achieved. can increase rigidity.
以下に本発明の一実施例を第２図〜第９図に基
づいて説明する。第２図、第３図は作業可能状態
を示し、１０はプラツトホーム、１１はレグ、１
２はジヤツキアツプハウジングである。レグ１１
は海底１３に着床し、またプラツトホーム１０は
海面１４に対して上方に持ち上げられている。１
５は補強梁で、その基端は第１連結装置１６を介
して前記プラツトホーム１０の中央寄り下面に揺
動可能に取付けてあり、また遊端は前記レグ１１
の中間側部に対して第２連結装置１７を介して連
結している。第４図は曳航時の状態を示す。すな
わちレグ１１を引上げられ、また第２連結装置１
７の連結が解除された補強梁１５は第２連結装置
１６の周りにに上方揺動されてプラツトホーム１
０の下面に沿い、そしてプラツトホーム１０を貫
通する着脱用のワイヤ１８によつて該プラツトホ
ーム１０側に固縛されている。第５図〜第７図に
前記第１連結装置１６が示されている。すなわち
プラツトホーム１０の底板にスリツト１９が形成
され、このスリツト１９を貫通すると共に長さ方
向に移動可能な可動縦軸２０が設けられる。この
可動縦軸２０の上端にはスリツト巾よりも大径の
円板２１が取付けられ、また下端にはくし歯状の
支持用ブラケツト２２が取付けられている。また
補強梁１５の基端には前記支持用ブラケツト２２
に嵌合可能なくし歯状の取付用ブラケツト２３が
取付けられ、両ブラケツト２２，２３は嵌合状態
において横方向ピン２４により連結される。した
がつて補強梁１５は横軸心２５の周りに上下揺動
可能となる。２６は円板２１の上面から側面に亘
つて対向するスライド防止用ブラケツトで、補強
梁１５を所定の姿勢にしたのちプラツトホーム１
０側に複数個取付けて前記円板２１の位置決めを
行なう。第８図、第９図に前記第２連結装置１７
が示されている。すなわちレグ１１の内面側には
板体などを介してくし歯状の支持用ブラケツト２
７が取付けられ、そして補強梁１５の遊端には前
記支持用ブラケツト２７に嵌合可能なくし歯状の
取付用ブラケツト２８が取付けてある。両ブラケ
ツト２７，２８の嵌合状態において挿抜可能な連
結ピン２９が設けられる。 An embodiment of the present invention will be described below based on FIGS. 2 to 9. 2 and 3 show the workable state, 10 is the platform, 11 is the leg, 1
2 is the jack up housing. leg 11
has landed on the seabed 13, and the platform 10 has been lifted upwards relative to the sea level 14. 1
Reference numeral 5 denotes a reinforcing beam, the base end of which is swingably attached to the lower surface of the platform 10 near the center via a first connecting device 16, and the free end connected to the leg 11.
It is connected to the middle side of the body via a second connecting device 17. Figure 4 shows the condition when being towed. That is, the leg 11 can be pulled up, and the second coupling device 1 can be pulled up.
The uncoupled reinforcing beam 15 of 7 is swung upwards around the second coupling device 16 to the platform 1.
It is secured to the platform 10 by a removable wire 18 that runs along the lower surface of the 0 and passes through the platform 10. The first coupling device 16 is shown in FIGS. 5-7. That is, a slit 19 is formed in the bottom plate of the platform 10, and a movable longitudinal shaft 20 is provided which passes through the slit 19 and is movable in the longitudinal direction. A disk 21 having a diameter larger than the slit width is attached to the upper end of the movable vertical shaft 20, and a comb-like supporting bracket 22 is attached to the lower end. Furthermore, the supporting bracket 22 is attached to the base end of the reinforcing beam 15.
A comb-like mounting bracket 23 that can be fitted is attached to the bracket 22, 23, and both brackets 22, 23 are connected by a lateral pin 24 in the fitted state. Therefore, the reinforcing beam 15 can swing up and down around the horizontal axis 25. Reference numeral 26 denotes a slide prevention bracket that faces the disk 21 from the top surface to the side surface, and is attached to the platform 1 after the reinforcing beam 15 is in a predetermined position.
A plurality of discs are attached to the zero side to position the disc 21. The second coupling device 17 is shown in FIGS. 8 and 9.
It is shown. That is, a comb-shaped support bracket 2 is attached to the inner surface of the leg 11 via a plate or the like.
7 is attached to the free end of the reinforcing beam 15, and a comb tooth-shaped attachment bracket 28 that can be fitted into the support bracket 27 is attached to the free end of the reinforcing beam 15. A connecting pin 29 is provided which can be inserted and removed when both brackets 27 and 28 are fitted.
昇降式海上作業台は第４図の状態で目的海域ま
で曳航される。そして目的海域において、先ずワ
イヤ１８を緩めて補強梁１５を横軸心２５の周り
に下方揺動させる。このときスライド防止用ブラ
ケツト２６は取付けてなく、したがつて円板２１
は位置決めされていない。補強梁１５の下方揺動
によりレグ１１を下降し得ることになり、以つて
該レグ１１を下降して海底１３に着地させる。そ
してレグ１１とプラツトホーム１０とさらに相対
移動させることにより、該プラツトホーム１０を
海面１４に対して所定レベルまで持上げる。その
後、ワイヤ１８の引上げによつて補強梁１５を
徐々に上方揺動させ、その取付用ブラケツト２８
を支持用ブラケツト２７に嵌合させたのち、ダイ
バーが連結ピン２９を挿入して連結を行なう。前
述したレグ１１の着地時において、レグ下端の海
底１３に対する貫入量は一様でなく、異なる。し
たがつてレグ１１側の支持用ブラケツト２７のレ
ベルは各レグ１１毎に異なることになる。その差
の吸収は、スリツト１９に対する可動縦軸２０の
移動によつて第１連結装置１６の位置を変位させ
ることによつて可能となる。補強梁１５の遊端を
レグ１１側に連結した後の第１連結装置１６の位
置決めは、プラツトホーム１０側にスライド防止
用ブラケツト２６を取付けて円板２１の移動を規
制することにより可能となる。なおレグ１１の回
転に対して補強梁１５の向き調整は、可動縦軸２
０ならびに円板２１が回転可能であることから容
易に行なえる。上述した作業により、第２図、第
３図に示すように所望の態勢にし得る。 The elevating offshore work platform will be towed to the destination sea area in the condition shown in Figure 4. Then, in the destination sea area, first, the wire 18 is loosened to swing the reinforcing beam 15 downward around the horizontal axis 25. At this time, the slide prevention bracket 26 is not attached, so the disc 21
is not positioned. The downward swinging of the reinforcing beam 15 allows the leg 11 to be lowered, thereby lowering the leg 11 and landing it on the seabed 13. By further moving the legs 11 and the platform 10 relative to each other, the platform 10 is raised to a predetermined level with respect to the sea surface 14. Thereafter, the reinforcing beam 15 is gradually swung upward by pulling up the wire 18, and the mounting bracket 28 is
After fitting into the supporting bracket 27, the diver inserts the connecting pin 29 to perform the connection. When the aforementioned leg 11 lands, the amount of penetration of the lower end of the leg into the seabed 13 is not uniform and varies. Therefore, the level of the support bracket 27 on the leg 11 side differs for each leg 11. The absorption of the difference is made possible by displacing the position of the first coupling device 16 by movement of the movable longitudinal shaft 20 relative to the slit 19. The positioning of the first connecting device 16 after connecting the free end of the reinforcing beam 15 to the leg 11 side is made possible by attaching a slide prevention bracket 26 to the platform 10 side to restrict movement of the disc 21. The orientation of the reinforcing beam 15 with respect to the rotation of the leg 11 can be adjusted using the movable vertical shaft 2.
0 and the disk 21 are rotatable, this can be easily done. Through the operations described above, the desired posture can be achieved as shown in FIGS. 2 and 3.
第１０図、第１１図は第１連結装置１６の別の
実施例を示す。すなわち補強梁１５の基端に取付
けた部材３０をスリツト１９に貫通させ、そして
プラツトホーム１０内においてガイド部材３１に
スライド案内される門型部材３２と前記部材３０
とを横方向ピン２４で連結している。これにより
第１連結装置１６の連結支持位置を変更可能にし
得る。そして変更位置の位置決めは、門型部材３
１の移動方向両端と、一対の固定部材３３との間
に複数枚のストツパー板３４を挿入することによ
り可能となる。 10 and 11 show another embodiment of the first coupling device 16. FIG. That is, the member 30 attached to the base end of the reinforcing beam 15 is passed through the slit 19, and the gate-shaped member 32 and the member 30 are slidably guided by the guide member 31 within the platform 10.
and are connected by a lateral pin 24. This allows the connection and support position of the first connection device 16 to be changed. Then, the positioning of the changed position is performed using the gate-shaped member 3.
This is made possible by inserting a plurality of stopper plates 34 between both ends of one moving direction and a pair of fixing members 33.
以上述べた本発明によると、レグを着地させ、
そしてプラツトホームを所定レベルまで上昇させ
たのち、補強梁の遊端をレグに連結することによ
つて、この補強梁によりプラツトホームとレグと
を剛体化でき、以つて簡単な構造を付加するのみ
で剛性を上げることができる。 According to the present invention described above, when the leg lands,
After raising the platform to a predetermined level, by connecting the free ends of the reinforcing beams to the legs, the platform and legs can be made rigid by the reinforcing beams. can be raised.
第１図は従来例を示す概略正面図、第２図〜第
９図は本発明の一実施例を示し、第２図は作業可
能状態での正面図、第３図は同平面図、第４図は
曳航状態での正面図、第５図は第１連結装置の正
面図、第６図は同側面図、第７図は同平面図、第
８図は第２連結装置の正面図、第９図は同平面
図、第１０図は第１連結装置の別の実施例を示す
正面図、第１１図は同側面図である。
１０……プラツトホーム、１１……レグ、１５
……補強梁、１６……第１連結装置、１７……第
２連結装置。
FIG. 1 is a schematic front view showing a conventional example, FIGS. 2 to 9 show an embodiment of the present invention, FIG. 2 is a front view in a ready state, FIG. 3 is a plan view of the same, 4 is a front view of the towed state, FIG. 5 is a front view of the first coupling device, FIG. 6 is a side view of the same, FIG. 7 is a plan view of the same, and FIG. 8 is a front view of the second coupling device. FIG. 9 is a plan view of the same, FIG. 10 is a front view showing another embodiment of the first coupling device, and FIG. 11 is a side view of the same. 10...Platform, 11...Leg, 15
...Reinforcement beam, 16...First connection device, 17...Second connection device.
Claims (1)
貫設してなる昇降式海上作業台において、前記プ
ラツトホームの下面に補強梁を揺動可能に取付
け、この補強梁の遊端を前記レグに連結可能に構
成したことを特徴とする昇降式海上作業台。1. In an elevating offshore work platform in which a plurality of legs are installed through a platform so as to be able to rise and fall, a reinforcing beam is swingably attached to the underside of the platform, and the free end of this reinforcing beam can be connected to the leg. An elevating type offshore work platform characterized by the following configuration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19930982A JPS5988520A (en) | 1982-11-12 | 1982-11-12 | Liftable offshore work platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19930982A JPS5988520A (en) | 1982-11-12 | 1982-11-12 | Liftable offshore work platform |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5988520A JPS5988520A (en) | 1984-05-22 |
| JPS6147926B2 true JPS6147926B2 (en) | 1986-10-22 |
Family
ID=16405654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19930982A Granted JPS5988520A (en) | 1982-11-12 | 1982-11-12 | Liftable offshore work platform |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5988520A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL1009128C2 (en) * | 1998-05-11 | 1999-11-12 | Zwagerman International B V J | Lifting Island. |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5826447B2 (en) * | 1979-11-08 | 1983-06-02 | 川崎重工業株式会社 | Truss strut coupling device |
-
1982
- 1982-11-12 JP JP19930982A patent/JPS5988520A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5988520A (en) | 1984-05-22 |
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