JPS57201412A - Fabrication of legs of marine structure - Google Patents

Fabrication of legs of marine structure

Info

Publication number
JPS57201412A
JPS57201412A JP8449681A JP8449681A JPS57201412A JP S57201412 A JPS57201412 A JP S57201412A JP 8449681 A JP8449681 A JP 8449681A JP 8449681 A JP8449681 A JP 8449681A JP S57201412 A JPS57201412 A JP S57201412A
Authority
JP
Japan
Prior art keywords
leg
split
legs
working platform
lower split
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
JP8449681A
Other languages
Japanese (ja)
Inventor
Iwao Oki
Kimito Furuta
Yoshio Yoshizaki
Hidetoshi Aki
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.)
JFE Engineering Corp
Original Assignee
NKK Corp
Nippon Kokan 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 NKK Corp, Nippon Kokan Ltd filed Critical NKK Corp
Priority to JP8449681A priority Critical patent/JPS57201412A/en
Publication of JPS57201412A publication Critical patent/JPS57201412A/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
    • E02B17/02—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
    • E02B2017/0039—Methods for placing the offshore structure
    • E02B2017/0047—Methods for placing the offshore structure using a barge
    • 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 easily fabricate the legs of a marine structure by a method in which upper split legs are fabricated on a working platform, lower split legs are delivered with the working platform to a given sea area, the lower split legs are pulled up to the working platform, and these split legs are integrally combined. CONSTITUTION:Each leg is divided into at least two, or an upper split leg 3a and a lower split leg 3b, and they are separately manufactured. The upper split leg 3a is built in the leg driving chamber 2 of a working platform 1, and the working platform 1 and the lower split leg 3b are put on a barge 5 and towed. Then, water si charged into the barge 5 to float the working platform 1 and the lower split leg 3b, and sea water is charged into a spud 4 to vertically move the lower split leg 3b in such a way as to turn the spud 4 downwardly. A wire rope 6 is wound up by a winch to pull up the loer split leg 3b, and its upper end is contacted with the lower end of the upper split leg 3a. The upper and lower split legs 3a and 3b are integrally lifted up and their contact portions are combined fixedly on the working platform 1.
JP8449681A 1981-06-03 1981-06-03 Fabrication of legs of marine structure Pending JPS57201412A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8449681A JPS57201412A (en) 1981-06-03 1981-06-03 Fabrication of legs of marine structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8449681A JPS57201412A (en) 1981-06-03 1981-06-03 Fabrication of legs of marine structure

Publications (1)

Publication Number Publication Date
JPS57201412A true JPS57201412A (en) 1982-12-09

Family

ID=13832248

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8449681A Pending JPS57201412A (en) 1981-06-03 1981-06-03 Fabrication of legs of marine structure

Country Status (1)

Country Link
JP (1) JPS57201412A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5445476A (en) * 1993-09-30 1995-08-29 Shell Oil Company Reusable offshore platform jacket
US5447391A (en) * 1993-09-30 1995-09-05 Shell Oil Company Offshore platform structure and system
US5551801A (en) * 1994-12-23 1996-09-03 Shell Offshore Inc. Hyjack platform with compensated dynamic response
US5593250A (en) * 1994-12-23 1997-01-14 Shell Offshore Inc. Hyjack platform with buoyant rig supplemental support
US5741089A (en) * 1994-12-23 1998-04-21 Shell Offshore Inc. Method for enhanced redeployability of hyjack platforms

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5445476A (en) * 1993-09-30 1995-08-29 Shell Oil Company Reusable offshore platform jacket
US5447391A (en) * 1993-09-30 1995-09-05 Shell Oil Company Offshore platform structure and system
US5551801A (en) * 1994-12-23 1996-09-03 Shell Offshore Inc. Hyjack platform with compensated dynamic response
US5593250A (en) * 1994-12-23 1997-01-14 Shell Offshore Inc. Hyjack platform with buoyant rig supplemental support
US5741089A (en) * 1994-12-23 1998-04-21 Shell Offshore Inc. Method for enhanced redeployability of hyjack platforms

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