EP2020463A1 - Batardeau-caisson et procédé de protection d'une construction offshore contre l'eau environnante en utilisant celui-ci - Google Patents

Batardeau-caisson et procédé de protection d'une construction offshore contre l'eau environnante en utilisant celui-ci Download PDF

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Publication number
EP2020463A1
EP2020463A1 EP08010102A EP08010102A EP2020463A1 EP 2020463 A1 EP2020463 A1 EP 2020463A1 EP 08010102 A EP08010102 A EP 08010102A EP 08010102 A EP08010102 A EP 08010102A EP 2020463 A1 EP2020463 A1 EP 2020463A1
Authority
EP
European Patent Office
Prior art keywords
cofferdam
offshore structure
water
wall elements
sealing device
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.)
Withdrawn
Application number
EP08010102A
Other languages
German (de)
English (en)
Inventor
Carsten Kassen
Peter Krallmann
Stefan Dörfeldt
Sven Bicker
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.)
Weserwind Offshore Construction Georgsmarienhuette GmbH
Original Assignee
WeserWind GmbH
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 WeserWind GmbH filed Critical WeserWind GmbH
Publication of EP2020463A1 publication Critical patent/EP2020463A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D19/00—Keeping dry foundation sites or other areas in the ground
    • E02D19/02—Restraining of open water
    • E02D19/04—Restraining of open water by coffer-dams, e.g. made of sheet piles
    • 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

Definitions

  • the present invention relates to a cofferdam for shielding components which are mostly wetted with water and / or components of an offshore structure which are mostly submerged from ambient water, and to a method for shielding using such a cofferdam.
  • a cofferdam is a system that creates in the water a dry area accessible from above above the bottom of the water or on the bottom of the water. Such a cofferdam is used, for example, in bridge construction for the production of a bridge foundation.
  • the use of a cofferdam is also known in the construction of offshore structures.
  • a cofferdam can be designed as a large open cylinder, which is placed on the water bottom. After emptying the vertical cylinder, a dry and safe workplace can be provided to carry out the corresponding work below the waterline.
  • cofferdam systems known in hydraulic engineering, which are recognized on existing underwater structures to work there, for example, to carry out revision work.
  • BE 902 531 a caisson, which is attached to a sheet pile wall and is held there by applied negative pressure.
  • GB 208 620 describes a vertical concrete cylinder independent of the depth of the water, reaching down to the ground, open at the top and at the bottom, for carrying out work on the (sea) floor.
  • the US 3,710,579 in turn describes an annular, segmented cofferdam containing PU-filled areas as an essential buoyancy element; the balancing takes place here by flooding and Lenzen of ballast water tanks.
  • the cofferdam should be attachable to an offshore structure in a simple manner, allow a simple seal against surrounding water even in offshore structures with irregular cross-section as well as easy to build or disassemble and be portable.
  • the first object is achieved by at least two, connected via at least one joint and pivotable about the offshore structure laid, substantially vertical wall elements which are closed together at the end faces remote from the joint, a bottom portion with at least one hollow sealing device, the pressure be acted upon and pressable to the offshore structure, and adjustable punches that are clamped between the offshore structure and the inside of the wall elements.
  • the hollow sealing device is adaptable to the geometry of the offshore structure.
  • the hollow sealing device can be acted upon by filling water or gas with pressure.
  • the cofferdam can preferably be mobile and is advantageously connected to a crane.
  • the cofferdam is also preferably characterized by one or more hydraulically driven elements for pivoting and / or closing, such as locking, the wall elements.
  • the cofferdam is frictionally connected to the offshore structure.
  • the cofferdam preferably also has at least one docking device on an outer side of the wall elements.
  • At least one seal is preferably proposed on an end face of at least one wall element.
  • cofferdam is made substantially of steel.
  • the second object is achieved by a method for shielding mostly water-wetted and / or mostly underwater components of an offshore structure against surrounding water, comprising the steps of: (i) applying a cofferdam according to the invention around the offshore structure and Closing it, (ii) tensioning the adjustable punches between the offshore structure and the inside of the walls, (iii) attaching the at least one hollow sealing device to the bottom portion of the cofferdam and pressurizing it to seal a clearance between the offshore structure and cofferdam, and (iv) emptying the water trapped in the cofferdam.
  • the cofferdam is created by means of a crane.
  • the proposed cofferdam overcomes the above-described disadvantages of the prior art.
  • the cofferdam invention can be easily applied and secured to an offshore structure, with a secure seal of the created interior space between the cofferdam and offshore structure is achieved by the at least one hollow sealing device which is designed so flexible that they themselves adapt to any external geometry of an offshore structure.
  • This adjustment is made by the fact that the hollow sealing device can be pressurized. Becomes For example, introduced water or air in the hollow sealing device, the hollow sealing device expands between, for example. Irregularly shaped supply and / or disposal lines on the outside of the offshore structure that this supply and / or disposal lines tightly enclosed by this hollow sealing device and therefore sealed become.
  • the device according to the invention further enables a simple, secure and stable attachment of the cofferdam to the offshore structure by allowing several adjustable punches to be tensioned between the offshore structure and the inside of the wall elements. Due to high frictional forces, these adjustable punches hold the cofferdam in place on the offshore structure and prevent it from slipping off.
  • Corresponding adjustable punch are well known in the art and can be, for example, stamp screwed through screw thread in the space between the offshore structure and the inside of the wall elements of the cofferdam and thereby clamped.
  • the cofferdam according to the invention can be dismantled in a simple manner. He is therefore extremely mobile.
  • the assembly and disassembly can be done for example by means of a floating crane, which can attach the cofferdam in a suitable position on an offshore structure.
  • Fig. 1 shows a cross-sectional supervision on a cofferdam 20 according to the invention, which is already partially laid around an offshore structure 10 and is to be attached thereto.
  • the offshore structure 10 On its outside, the offshore structure 10 has a plurality of power lines 11, which make it difficult to seal the cofferdam 20 from surrounding water.
  • the cofferdam 20 has two substantially semicircular wall elements 22a, 22b, which are connected via a hinge 21 and held pivotably.
  • One of the wall elements 22a is shown very schematically and simplified.
  • the wall elements 22a, 22b are preferably double wall elements.
  • the not yet completely placed around the offshore structure 10 wall element 22a for example, via a hydraulic drive (not shown) are moved so that it abuts against the end face of the other wall element 22b and a subsequent closure, preferably a lock is possible. Between all end faces of the wall elements 22a, 22b, one or more seals (not shown) may be provided. If the end faces of the wall elements 22a, 22b abut one another, they can be locked, for example, by means of locking elements, which can likewise be hydraulically actuated.
  • adjustable punches 7 can then be inserted between the offshore structure 10 and the inside of the wall elements, with the help of which, due to the high frictional forces, a secure hold of the cofferdam 20 on the offshore structure 10 is possible ,
  • Fig. 2 shows a somewhat more detailed, perspective view of a laid around the offshore structure 10 cofferdam 20, which can be moved and mounted on a support device.
  • the carrying device is attached to a floating crane.
  • the carrying device comprises a steel frame 60, a counterweight 61, a Y-Traverse 62 and ropes 70, via which the cofferdam 20 is attached to the support device.
  • At least one of the ropes may further comprise a hydraulic cylinder 33 for leveling the cofferdam 20.
  • Such a leveling possibility is advantageous because possible shaft movements can cause a misalignment of the cofferdam 20 during assembly, ie when the cofferdam hangs on the floating crane or ship crane.
  • the in Fig. 2 Cofferdam 1 shown also has a joint 21, preferably with a hinge, on which the wall elements 22a, 22b are connected and pivotable. On the wall elements 22a, 22b eyes 27 are provided for a transport lock. Furthermore, at least one boat launch device 24 may be provided on the outside of the wall elements 22a, 22b. On the wall element 22a there is also a platform 26, for example for hydraulic units and supply devices of the cofferdam 20.
  • the reference numerals 30, 31 and 32 hydraulic cylinders are referred to, which are provided for the pivoting or locking operation of the wall elements 22a, 22b. These hydraulic cylinders can be driven by a hydraulic motor.
  • a seal 40 is provided for a horizontal and vertical sealing of the cofferdam 20 with respect to surrounding water. This seal 40 is essentially for the area around the offshore structure 10, which has no supply and / or disposal lines 11.
  • Another hollow sealing device 41 is also shown in the lower region of the cofferdam 20, this hollow sealing device is provided for the area of supply and / or disposal lines. Both seals 40, 41 can be pressurized by introducing water or gas so that they expand and allow a secure seal between the cofferdam 1 and the offshore structure 10.
  • the seal 41 for the and / or disposal lines lie down when pressurizing the supply and / or disposal lines tight.
  • FIG Fig. 3 A more detailed view of the hollow sealing device 41 for the supply and / or disposal lines 11 is shown in FIG Fig. 3 shown.
  • the not yet pressurized hollow sealing device 41 was placed around the supply and / or disposal lines 11.
  • this hollow sealing device 41 was pressurized, for example, by water or gas, expanded and closed all gaps between the supply and / or disposal lines 11, the cofferdam 20 and the offshore structure 10.
  • Fig. 3 is shown.
  • the cofferdam 20 which is held on a floating crane by a support device, can first be applied to an offshore structure 10 and the wall elements 22a, 22b are closed and locked around the offshore structure 10. Subsequently, the adjustable punches 7 can be clamped between the offshore structure 10 and the inside of the wall elements 22a, 22b, followed by attaching the at least one hollow sealing device 40, 41. Attaching the hollow sealing devices 40, 41 after closing and locking the cofferdam under Water at the intended location avoids, on the one hand, that an improperly mounted hollow sealing device 40, 41 is damaged during the closing process. On the other hand, nobody has to supervise the closing process during closing.
  • the offshore structure also has externally arranged supply and / or disposal lines, it is recommended to provide a plurality of hollow sealing devices 40, 41 in order to achieve a secure seal. If the one or more hollow seals are then pressurized, a tightly closed working area is provided within the cofferdam 20 from which trapped water can then be removed in a simple manner, for example by pumping out.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Revetment (AREA)
EP08010102A 2007-08-02 2008-06-03 Batardeau-caisson et procédé de protection d'une construction offshore contre l'eau environnante en utilisant celui-ci Withdrawn EP2020463A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007036541A DE102007036541A1 (de) 2007-08-02 2007-08-02 Kofferdamm und Verfahren zur Abschirmung eines Offshore-Aufbaus gegen umgebendes Wasser unter Verwendung desselben

Publications (1)

Publication Number Publication Date
EP2020463A1 true EP2020463A1 (fr) 2009-02-04

Family

ID=39855122

Family Applications (1)

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EP08010102A Withdrawn EP2020463A1 (fr) 2007-08-02 2008-06-03 Batardeau-caisson et procédé de protection d'une construction offshore contre l'eau environnante en utilisant celui-ci

Country Status (2)

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EP (1) EP2020463A1 (fr)
DE (1) DE102007036541A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3190233A1 (fr) * 2016-01-10 2017-07-12 ABC Alba Business Consultancy e.K Dispositif et procédé correspondant destinés à appliquer un système de cofferdam sur un mono-pieu d'ouvrages en mer pour l'entretien de la fondation du mono-pieu
NL2016433B1 (en) * 2016-03-15 2017-10-03 Boskalis Offshore Subsea Services (Europe) B V Apparatus for Treating a Surface of a Pile.
CN115162384A (zh) * 2022-07-21 2022-10-11 河南省水利第一工程局 泵站前池不停水施工围堰结构及不停水施工方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112853980A (zh) * 2021-01-06 2021-05-28 中铁大桥局集团第一工程有限公司 一种围堰钢管桩及围堰合龙纠偏施工方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB208620A (en) 1922-10-28 1923-12-27 Francis Gascoigne Lynde Improvements in and relating to caissons, coffer dams, platforms and the like
US3710579A (en) 1971-05-13 1973-01-16 D Killmer Portable coffer dam and method of making
GB1375970A (en) 1971-12-07 1974-12-04 Kaiser Steel Corp Cofferdam device for off-shore structure
BE902531A (nl) 1985-05-29 1985-09-16 Gen Coatings Nv Inrichting voor het in het droge uitvoeren van werken aan een onder water vertoevende damplankenwand.
JPH09189043A (ja) * 1996-01-11 1997-07-22 Pacific Consultants Kk 締切用ケーソン及び締切工法
JPH09242081A (ja) * 1996-03-13 1997-09-16 Penta Ocean Constr Co Ltd 乾式作業方法及びそれに用いる作業函
JPH09268562A (ja) * 1996-03-28 1997-10-14 Penta Ocean Constr Co Ltd 乾式作業方法及びそれに用いる作業函
JP2006249685A (ja) * 2005-03-08 2006-09-21 Jfe Engineering Kk 水中構造物の仮締切工法及び仮締切用構造体

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1807962A (en) * 1929-02-12 1931-06-02 Alphonse T Cassiere Marine cage
DE8423557U1 (fr) * 1984-08-08 1987-01-08 Seitz, Franz, 4630 Bochum, De

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB208620A (en) 1922-10-28 1923-12-27 Francis Gascoigne Lynde Improvements in and relating to caissons, coffer dams, platforms and the like
US3710579A (en) 1971-05-13 1973-01-16 D Killmer Portable coffer dam and method of making
GB1375970A (en) 1971-12-07 1974-12-04 Kaiser Steel Corp Cofferdam device for off-shore structure
BE902531A (nl) 1985-05-29 1985-09-16 Gen Coatings Nv Inrichting voor het in het droge uitvoeren van werken aan een onder water vertoevende damplankenwand.
JPH09189043A (ja) * 1996-01-11 1997-07-22 Pacific Consultants Kk 締切用ケーソン及び締切工法
JPH09242081A (ja) * 1996-03-13 1997-09-16 Penta Ocean Constr Co Ltd 乾式作業方法及びそれに用いる作業函
JPH09268562A (ja) * 1996-03-28 1997-10-14 Penta Ocean Constr Co Ltd 乾式作業方法及びそれに用いる作業函
JP2006249685A (ja) * 2005-03-08 2006-09-21 Jfe Engineering Kk 水中構造物の仮締切工法及び仮締切用構造体

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3190233A1 (fr) * 2016-01-10 2017-07-12 ABC Alba Business Consultancy e.K Dispositif et procédé correspondant destinés à appliquer un système de cofferdam sur un mono-pieu d'ouvrages en mer pour l'entretien de la fondation du mono-pieu
NL2016433B1 (en) * 2016-03-15 2017-10-03 Boskalis Offshore Subsea Services (Europe) B V Apparatus for Treating a Surface of a Pile.
CN115162384A (zh) * 2022-07-21 2022-10-11 河南省水利第一工程局 泵站前池不停水施工围堰结构及不停水施工方法

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