WO1990001871A1 - Structure flottante - Google Patents

Structure flottante Download PDF

Info

Publication number
WO1990001871A1
WO1990001871A1 PCT/GB1989/000952 GB8900952W WO9001871A1 WO 1990001871 A1 WO1990001871 A1 WO 1990001871A1 GB 8900952 W GB8900952 W GB 8900952W WO 9001871 A1 WO9001871 A1 WO 9001871A1
Authority
WO
WIPO (PCT)
Prior art keywords
walkway
flexible
floatable
structure according
floatable structure
Prior art date
Application number
PCT/GB1989/000952
Other languages
English (en)
Inventor
John Stuart Williams
Original Assignee
Dunlop Limited
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 Dunlop Limited filed Critical Dunlop Limited
Publication of WO1990001871A1 publication Critical patent/WO1990001871A1/fr

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
    • E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
    • E02B3/06—Moles; Piers; Quays; Quay walls; Groynes; Breakwaters ; Wave dissipating walls; Quay equipment
    • E02B3/062—Constructions floating in operational condition, e.g. breakwaters or wave dissipating walls
    • E02B3/064—Floating landing-stages
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K61/00—Culture of aquatic animals
    • A01K61/60—Floating cultivation devices, e.g. rafts or floating fish-farms
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D15/00—Movable or portable bridges; Floating bridges
    • E01D15/14—Floating bridges, e.g. pontoon bridges
    • E01D15/20—Floating bridges, e.g. pontoon bridges collapsible, expandable, inflatable or the like with main load supporting structure consisting only of non-rigid members
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
    • Y02A40/81—Aquaculture, e.g. of fish

Definitions

  • This invention relates to a floatable structure of a flexible kind such as a flexible floatable structure comprising one or more hoses or like elongate support members adapted for flotation.
  • the present invention seeks to provide a flexible floatable structure which better facilitates access by personnel.
  • the present invention provides a flexible floatable structure comprising a flexible elongate support adapted for flotation and a walkway supported by said flexible elongate support, said walkway having an ability to flex substantially freely along its length about axes contained by the plane of the walkway and extending perpendicular to " the length thereof and being substantially transversely rigid whereby it resists flexing about an axis contained in said plane and extending in the direction of the length of the walkway.
  • the walkway comprises the structure of a transversely rigid conveyor belt such as one of the conveyor belt structures described in the specification of UK Patent 974131 or UK 1436708. That is, the walkway may comprise an elongate layer of flexible polymeric material having embedded therein a reinforcement comprising two layers of individually flexible metal or textile cords, the cords of each layer being substantially parallel with each other and substantially at right angles to the length of the walkway with the separation of the cord layers, which are bonded to the polymeric material, being sufficient to confer a substantial degree of transverse rigidity upon the layer of flexible polymeric material.
  • the layer of flexible polymeric material additionally may comprise at least one layer of embedded reinforcement which serves to resist longitudinal extension of the layer of flexible polymeric material.
  • the walkway may comprise a plurality of individually rigid elements arranged to extend transversely of the length of the walkway, respective end ' regions of successive rigid elements being interconnected by means which permits flexing of the walkway along its length, i e flexing about axes contained by the plane of the walkway and extending transversely of the length of the walkway.
  • the flexible elongate support may be comprised by one or more flexible hoses.
  • the or each of said hoses may be adapted for flotation by the bore of the hose being sealed against ingress of seawater so as to contain air or other gas, by flotation collars and/ or by buoyancy material built into the wall structure or bore of the hose.
  • the flexible elongate support comprises a pair of hoses arranged to extend side-by-side, with each hose serving primarily to support a respective edge of a walkway.
  • each hose is of a kind having a torsional stiffness of at least 100,000 Newton metres/radian/metre length (0.58 foot tons per degree per foot length) and preferably the two hoses extend side-by-side in a spaced apart configuration.
  • the flexible elongate support may comprise the structure of a floatable frame or a part of a floatable frame of the kind the subject of our co-pending U K patent application No. 8819564.9 dated 17 August 1988 and entitled "Floatable Frame".
  • a net or like fish containment means may either be secured directly to or be indirectly supported by the flexible elongate support.
  • Figure 1 is a perspective view of the end of part of a floatable structure in accordance with the present invention
  • Figure 2 is a transverse section of the walkway shown in Figure 1
  • Figure 3 is a side view of part of the length of the structure of Figure 1
  • Figure 4 shows a detail of the structure of.
  • a flexible floatable structure 10 for fish farming apparatus comprises a pair 11 of identical flexible reinforced hoses 12a,12b of 300 mm outer diameter having secured thereto a flexible'walkway 13.
  • the hoses 12a,12b are each of a kind known per se and may be inherently buoyant by virtue of the combination of materials selected for construction of the hose wall. Additional • buoyancy is provided by air contained in the hose walls which are sealed against ingress of water.
  • the pair of hoses is provided at 2 metre intervals with intermediate spacers 14 (see Figures 3 and 4) which maintain a predetermined small spacing of approximately 150 mm between the two hoses.
  • the spacers 14 each comprise a- central link portion 15 and two adjustable ring portions 16. Subsequent to the spacers being slid along the hoses to the required positions, clamp means 17 is tightened to result in each ring portion 16 being secured to a respective hose 12a,12b.
  • the spacers 14 additionally comprise location means 18 by which the walkway 13 is secured transversely relative to the spacers.
  • the two hoses of the pair are interconnected with one another at their respective ends by connector blocks (not shown) .
  • each hose having an inherent resistance to compression and tension the connector blocks co-operate with the pair of hoses to result in the latter being well adapted to resist change of radius of curvature about an axis perpendicular to the plane of the walkway as a result of sideways forces experienced by the hoses either due to movement relative to water or for example by vessels during mooring.
  • the interconnection of the hoses does not, however, significantly inhibit their ability to flex along their length about axes contained in the plane of the walkway and extending perpendicular to the length thereof; in consequence the hoses are able to conform substantially to wave patterns without experiencing damaging forces.
  • the walkway 13 comprises a layer of elastomeric material such as rubber having embedded therein two spaced-apart layers 19,20 of steel cords which are bonded to the rubber.
  • the walkway additionally comprises two layers 21,22 of woven textile reinforcement which provides the walkway with an ability of resist undue extension when subject to tension.
  • the two hoses are interconnected at their ends thereby to result in the pair of hoses being resistant to transverse deflection in the plane of the walkway.
  • Such interconnection is not, however, essential and additionally or alternatively the two hoses may be connected along their lengths, for example by virtue of each being attached to the walkway whereby the walkway co-operates with the two hoses to result in a similar ability to resist transverse deflection.
  • the walkway described with reference to the first embodiment of the invention has a continuous surface, which may be textured for drainage and/or anti-slip purposes, ' and for many applications this will be advantageous.
  • a floatable structure comprises a walkway which offers a discontinuous surface.
  • a floatable structure comprises a flexible elongate support comprised by a pair of hoses as described in respect of the first embodiment of the invention, and a walkway 30 of an alternative construction.
  • the walkway 30 comprises a plurality of transversely extending individually rigid metal bars 31 interconnected for example by steel cables 32 arranged to extend through and be clamped in through-passages 33 formed in the respective ends of each bar.
  • the resulting walkway is flexible about axes contained by the plane of the walkway and extending transverse to the length thereof and thus does not significantly inhibit the ability of the support hoses to flex in conformity with wave patterns.
  • the rigidity of the interconnected bars supported at their end regions by the two hoses provides a structure which is transversely rigid and thus well suited for supporting personnel.
  • the floatable structure additionally may comprise, for example, guard rails and mooring buoys which may be secured to the walkway and/or to the flexible elongate support - e g the support hoses.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • Environmental Sciences (AREA)
  • Civil Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Marine Sciences & Fisheries (AREA)
  • Zoology (AREA)
  • Animal Husbandry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

Une structure flottante pour un appareil de pisciculture au large comprend une passerelle (13, 30) supportée par un support (11) allongé souple tel qu'une paire de tuyaux flexibles (12a, 12b). Ladite passerelle est sensiblement rigide dans le sens transversal mais sensiblement libre de fléchir sur sa longueur de manière à ne pas empêcher ledit support (11) allongé flexible de fléchir avec le mouvement des vagues.
PCT/GB1989/000952 1988-08-17 1989-08-16 Structure flottante WO1990001871A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8819572.2 1988-08-17
GB888819572A GB8819572D0 (en) 1988-08-17 1988-08-17 Floatable structure

Publications (1)

Publication Number Publication Date
WO1990001871A1 true WO1990001871A1 (fr) 1990-03-08

Family

ID=10642290

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1989/000952 WO1990001871A1 (fr) 1988-08-17 1989-08-16 Structure flottante

Country Status (4)

Country Link
AU (1) AU4076789A (fr)
GB (2) GB8819572D0 (fr)
IS (1) IS3500A7 (fr)
WO (1) WO1990001871A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8819564D0 (en) * 1988-08-17 1988-09-21 Dunlop Ltd Floatable frame
ES2359795B1 (es) * 2009-11-17 2012-02-28 Inssoltu, S.L. Elemento de flotación para el montaje de piscifactorías.

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB974131A (fr) * 1960-07-29
DE123043C (fr) *
GB1436708A (en) * 1972-08-03 1976-05-26 Dunlop Ltd Conveyor belting
FR2355123A1 (fr) * 1976-06-18 1978-01-13 Barracudaverken Ab Passerelle flottante gonflable
US4145786A (en) * 1978-02-27 1979-03-27 Myers James S Portable floating apparatus
DE2946655A1 (de) * 1978-12-12 1980-07-03 Semperit Gmbh Aufblasbarer steg
WO1985003411A1 (fr) * 1984-02-02 1985-08-15 Trinova Ab Installation de pisciculture en pleine mer

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1383558A (en) * 1972-03-29 1974-02-12 Rotork Marine Ltd Design and construction of hulls
NO158201C (no) * 1986-01-23 1988-08-03 Wilfred Astord Floelo Anordning ved maer for fiskeoppdrett.

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE123043C (fr) *
GB974131A (fr) * 1960-07-29
GB1436708A (en) * 1972-08-03 1976-05-26 Dunlop Ltd Conveyor belting
FR2355123A1 (fr) * 1976-06-18 1978-01-13 Barracudaverken Ab Passerelle flottante gonflable
US4145786A (en) * 1978-02-27 1979-03-27 Myers James S Portable floating apparatus
DE2946655A1 (de) * 1978-12-12 1980-07-03 Semperit Gmbh Aufblasbarer steg
WO1985003411A1 (fr) * 1984-02-02 1985-08-15 Trinova Ab Installation de pisciculture en pleine mer

Also Published As

Publication number Publication date
GB8918664D0 (en) 1989-09-27
IS3500A7 (is) 1990-02-18
AU4076789A (en) 1990-03-23
GB2221876B (en) 1992-09-23
GB2221876A (en) 1990-02-21
GB8819572D0 (en) 1988-09-21

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