WO2010071570A1 - Arrangement and method for repairing and manufacturing floating jetties - Google Patents

Arrangement and method for repairing and manufacturing floating jetties Download PDF

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Publication number
WO2010071570A1
WO2010071570A1 PCT/SE2009/051420 SE2009051420W WO2010071570A1 WO 2010071570 A1 WO2010071570 A1 WO 2010071570A1 SE 2009051420 W SE2009051420 W SE 2009051420W WO 2010071570 A1 WO2010071570 A1 WO 2010071570A1
Authority
WO
WIPO (PCT)
Prior art keywords
mould
floating element
floating
cast
space
Prior art date
Application number
PCT/SE2009/051420
Other languages
French (fr)
Inventor
Sven Jönsson
Original Assignee
Fagerdala Marine Systems Ab
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 Fagerdala Marine Systems Ab filed Critical Fagerdala Marine Systems Ab
Publication of WO2010071570A1 publication Critical patent/WO2010071570A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
    • B63B35/34—Pontoons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B5/00—Hulls characterised by their construction of non-metallic material
    • B63B5/24—Hulls characterised by their construction of non-metallic material made predominantly of plastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
    • B63B73/70—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms characterised by using moulds; Moulds or plugs therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
    • B63B73/70—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms characterised by using moulds; Moulds or plugs therefor
    • B63B73/72—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms characterised by using moulds; Moulds or plugs therefor characterised by plastic moulding, e.g. injection moulding, extrusion moulding or blow moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
    • B63C1/00—Dry-docking of vessels or flying-boats
    • B63C1/02—Floating docks
    • 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
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
    • 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

Definitions

  • the present invention relates generally to floating jetties.
  • a common construction of a floating jetty is a floating element comprising a core of expanded polystyrene (EPS) or other cellular plastic and an outer layer of concrete. These floating elements are normally placed parallel in pair or separate and are assembled into a jetty by using a jetty deck of pressure-creosoted wood or concrete. Jetties of this construction have a high stability, high buoyancy and wave dampening properties.
  • the concrete layer enclosing the cellular plastic is normally between 4-5 cm thick and is reinforced with a reinforcement net to increase its tensile strength.
  • Floating jetties of this kind is used worldwide as mooring jetties in marinas and harbors. Assembly of several floating jetties is normally performed by wires with a rubber coupling or cables and the floating jetties are anchored into the bottom of the lake or sea by a cable or chain from an anchoring device at the bottom to anchoring points molded into the concrete or attached to the jetty deck.
  • the following patent application relates to a mould suitable for use when repairing floating jetties.
  • the mould is adapted to receive a cast, for example based on cement, concrete or other material capable of being hardened.
  • the mould comprises two opposite long sides, two opposite short sides and a bottom side.
  • the mould can be somewhat conical.
  • the angle a between one long side and the bottom side between 91 ° and 100° and according to one embodiment the angle between one short side and the bottom side between 91 ° and 100°.
  • the cast comprises cells or particles to that the completed cast receives a density lower that the density of water, i.e. approximately 1 kg/dm 3 .
  • the bottom side of the mould is adapted to be in contact with a lifting element which can comprise a polymeric material that can be reinforced with a fiber material.
  • the following patent application further relates to a method for reparation of floating elements by using a mould that can be left as jacketing after casting.
  • the method includes the following method steps: placement of the mould, at least partly enclosing the floating element, and filling of the mould with cast.
  • [00012] is the placement of the mould performed from below.
  • the following patent application also relates to a method for manufacturing a floating jetty, by using a mould that can be left as jacketing after casting.
  • the method includes the following method steps: placement of floating elements in the mould so that they at least partly is enclosed by the mould and so that at least a space is created between the mould and the floating element, and filling of the mould with cast so that the mould is bond to the floating element.
  • the cast has an admixture of particles with a density lower than 1 kg/dm 3 .
  • a last section of the space can be filled with a cast of higher structural strength and/or higher density.
  • Figure 1 discloses a mould when it is moved towards a floating element placed under a floating jetty.
  • Figure 2 discloses the mould of figure 1 when it is bound partly enclosing a floating element.
  • Figure 3 discloses the mould adapted for use by a floating cofferdam.
  • Cast preferably refers to a cast based on cement or a concrete material which hardens in a water mixture.
  • the cast is mixed with particles with a density lower than 1 kg/dm 3 .
  • This mixture is preferably of such a proportion that the cast as a whole has a density lower than 1 kg/dm 3 , which simplifies the use of the cast in methods as described in this application.
  • Floating elements preferably refers to floating elements comprising an expandable membrane suitable for filling of a gas, preferably air.
  • the expandable membrane is preferably made of a polymeric material, which can be reinforced with a fiber material.
  • Figure 1 discloses a mould 1 according to one embodiment.
  • the mould 1 comprises two opposite long sides 3a, b, two opposite short sides 4a, b and a bottom side 5.
  • the mould is somewhat conical, which simplifies the filling of cast and makes the press forces, which arises when the water surrounding a floating element 2 freezes, press the floating element 2 together with the added mould 1 upwards instead of pressing the mould 1 into pieces from the sides.
  • the angle ⁇ between one short side and the bottom side is between 91 ° and 100° and/or the angle a between one long side and the bottom side is between 91 ° and 100°.
  • the inside of the mould 1 (disclosed for example by 3b and 4a) is provided with distance elements, like plasticized distance bulges (not shown), which creates the play needed to surround the floating element 2 with the required amount of cast.
  • the plasticized distance bulges provided on the inside of the sides of the mould 1 also aims to anchor the mould 1 against the floating element 2.
  • the mould preferably is left as jacketing enclosing the floating element 2 it should be produced by a material with a good resistance against the marine environment in which the mould 1 is to be used.
  • the mould is produced by a polymeric material.
  • the mould is produced by fiber glass reinforced polyester.
  • the mould 1 is adapted so that it is possible for lifting element 6 to be fitted and attached to the outside of the bottom 5 of the mould 1 and to be locked by bands and hooks over the edge of the mould 1 .
  • the lift element 6 is adapted to be filled with gas, such as air, by a filling means 7, such as a hose, coupled to a compressor and/or a pressure tank.
  • a filling means 7 such as a hose
  • the lift element ⁇ comprises two interconnected rib shaped bags (not shown) adapted to be placed by the sides of the bottom to increase the stability when the mould is lowered below the water surface.
  • the mould 1 is bound to the floating element 2 either by locking elements placed on the inside of the mould 1 or by filling convex sides 3a, b, 4a, b with cast.
  • the locking elements are the plasticized distance bulges also used as distance elements.
  • the convex sides create the locking effect needed, at the same time as it is manufacturing advantageous since they also improves the clearance of the mould 1 from the shutter used during manufacturing of the mould 1 .
  • ⁇ filling channel 8 On top of the mould 1 there is ⁇ filling channel 8, which simplifies the filling of the mould.
  • the filling channel 8 can also be used to cast an anchorage frame in steel after the mould 1 had been filled.
  • the anchorage frame can preferably be used for attachment of attachments that for example can be used to lock the anchors which anchors the floating element 2 and/or the floating jetty 1 1 by the sea/lake bottom or by land.
  • the mould 1 can be adapted in size to fit the floating element 2 it is supposed to be used with.
  • the reparation of the floating jetty is performed on the regular spot for the floating jetty 2, alternatively at another more suitable place in the water.
  • the method starts by launch of the mould 1 , pulling it to the place of assembly and filling it with water by use of a pump. Thereafter the lift element 6 is placed as a flat bag under the mould 1 and is locked with bands and hooks over the edge of the mould 1 .
  • the lift element 6 comprises a filling means 7, such as a hose, which is connected to a compressor and/or a pressure tank.
  • the lift element 6 is filled with a certain amount of gas until the mould 1 is weightless in the water.
  • the mould 1 is pulled in under the floating element 2 by the aid of steering ropes placed in each corner of the mould 1 .
  • the lift element 6 When the mould 1 is straight under the floating element 2, the lift element 6 is filled with additional amounts of gas so that the mould is lifted in place, enclosing at least parts of the floating element 2 to be repaired. This positioning presses most of the water out of mould 1 . The remaining water is pumped out of the mould 1 , which now has its open side above the water surface. The mould 1 is now kept in place by its buoyancy which makes it possible to release the lift element 6, pull it out and use it for the next assembly. The mould 1 is secured with straps over the jetty deck 10 which remains until the cast is completely hardened, where after the mould 1 remains as a jacketing enclosing the floating element 2.
  • the mould 1 can also be manufactured with a lifting element integrated in the mould 1 , for example by gluing a plate of cell material, such as EPS, to the inside of the mould.
  • the mould 1 When the mould 1 is placed surrounding at least parts of the floating element 2 to be repaired, and is emptied of water, it is filled with cast.
  • the last section i.e. the upper most part of the mould 1 , which according to one embodiment is the filling channel 8, is filled with a cast of higher strength and/or density, such as water proof concrete.
  • the high strength concrete makes it possible to use this section as an anchorage frame onto which attachments is mould, which for example can be used to lock the anchors which anchor the floating element 2 and/or the floating jetty 1 1 by the sea/lake bottom or by land.
  • a vibration stick is preferably placed in the cast.
  • the mould can be subjected to gentle knocks from the outside, for example by a rubber hammer.
  • Figure 3 discloses an embodiment where a floating jetty of a larger model is repaired according to the method in the present invention.
  • Larger floating jetties 12 is also denominated floating caissons 12 and they can, as the smaller floating elements, be manufactured out of a cell material and have an outer layer of concrete.
  • these floating caissons 12 are empty internally.
  • Floating caissons 12 of this type is usually anchored with a chain 14, which normally is placed in a through-hole 13 in the floating caisson 12.
  • the chain 14 is in its turn attached to anchoring elements 15 at the bottom.
  • the pipe 1 8 comprises a collar 17, such as a square piece of metal, which is adapted to be attached with sealing compound at the bottom side 5 of the mould 1 .
  • the pipe 1 8 is preferably grouted with water proof concrete and the chains 14, which must be dismantled during the application of the mould 1 , are again mounted.
  • the pipe 18 and the collar 17 are preferably made of stainless steel which makes it possible to weld the collar 17 to the pipe 1 8.
  • the pipe 18 and the collar 17 are made of aluminum, galvanized sheet or a thermo plastic material.
  • a floating jetty 12 It is also possible to manufacture a floating jetty 12 according to the below described method.
  • the method relates to manufacturing of a floating jetty 12, by use of a mould 1 which can be left as mantling after casting.
  • floating elements 2 are places so that they are at least partly enclosed by the mould and so that at least a space is created between the mould and the floating element.
  • the mould In the space crated between the mould and the floating element the mould is filled with cast so that the mould is bonded to the floating element.
  • the cast has a mixture of particles with a density lower than 1 kg/dm3 in order to increase the buoyancy of the floating element 2.
  • the last section, i.e. the upper most part of the mould 1 is filled with a cast of higher strength and/or density, serving as an anchorage frame onto which attachments are mould.

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  • Engineering & Computer Science (AREA)
  • Ocean & Marine Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Environmental & Geological Engineering (AREA)
  • Bridges Or Land Bridges (AREA)
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Abstract

The present patent application relates to a mould (1) adapted to be used for repair of a floating jetty, whereby the mould (1) is adapted to receive a hardening cast. It is characterized in that the mould (1) is adapted to be bond to a floating element (2), so that the mould (1) is left as mantling of the floating element (2) after the cast has hardened. The application further relates to a method for repair of a floating element (2) by use of a mould (1). The method includes the steps: placement of a floating element (2) in the mould (1), so that the mould at least partly encloses the floating element (2) and so that at least a space is created between the mould (1) and the floating element (2), and filling of the space crated between the mould (1) and the floating element (2) with cast that hardens.

Description

ARRANGEMENT AND METHOD FOR REPAIRING AND MANUFACTURING
FLOATING JETTIES
Technical field
[0001 ] The present invention relates generally to floating jetties.
Background of the invention
[0002] A common construction of a floating jetty is a floating element comprising a core of expanded polystyrene (EPS) or other cellular plastic and an outer layer of concrete. These floating elements are normally placed parallel in pair or separate and are assembled into a jetty by using a jetty deck of pressure-creosoted wood or concrete. Jetties of this construction have a high stability, high buoyancy and wave dampening properties. The concrete layer enclosing the cellular plastic is normally between 4-5 cm thick and is reinforced with a reinforcement net to increase its tensile strength.
[0003] Floating jetties of this kind is used worldwide as mooring jetties in marinas and harbors. Assembly of several floating jetties is normally performed by wires with a rubber coupling or cables and the floating jetties are anchored into the bottom of the lake or sea by a cable or chain from an anchoring device at the bottom to anchoring points molded into the concrete or attached to the jetty deck.
[0004] Concrete is not a completely waterproof material; therefore after a while small pores and cracks in the material are filled with water. When this water freeze the water volume increase, leading to tension in the concrete and to larger cracks. This process is escalated when repeated in the now even larger cracks. When the water reaches the EPS core, the core also slowly fills up with water, which in time decreases the buoyancy. The buoyancy is also decreased by ice tearing of pieces of the cellular plastic. [0005] An exchange of the floating blocks is very difficult and costly because the whole jetty deck must be demounted to be able to reach the attachment points of the floating blocks. In order to insert new blocks, the whole jetty must be lifted because otherwise the height between the water surface and jetty is too small. By reparations demanding a placement of the floating jetties on land, all anchorage cables must be released and a large crane and divers are needed. Alternative reparation methods require work from divers which is complicated and costly. It would therefore be advantageously to have a device and a method allowing reparation of the floating jetties at the spot at a reasonable cost and also that in the most feasible case eliminates the need of divers.
[0006] It would also be an advantage to be able to manufacture a durable floating jetty to a reasonable cost.
Summary of invention
[0007] The following patent application relates to a mould suitable for use when repairing floating jetties. The mould is adapted to receive a cast, for example based on cement, concrete or other material capable of being hardened.
[0008] According to one embodiment the mould comprises two opposite long sides, two opposite short sides and a bottom side. For improved characteristics the mould can be somewhat conical. According to one embodiment the angle a between one long side and the bottom side between 91 ° and 100° and according to one embodiment the angle between one short side and the bottom side between 91 ° and 100°.
[0009] According to one embodiment the cast comprises cells or particles to that the completed cast receives a density lower that the density of water, i.e. approximately 1 kg/dm3. [00010] According to one embodiment the bottom side of the mould is adapted to be in contact with a lifting element which can comprise a polymeric material that can be reinforced with a fiber material.
[0001 1 ] The following patent application further relates to a method for reparation of floating elements by using a mould that can be left as jacketing after casting. The method includes the following method steps: placement of the mould, at least partly enclosing the floating element, and filling of the mould with cast.
[00012] According to one embodiment is the placement of the mould performed from below.
[00013] The following patent application also relates to a method for manufacturing a floating jetty, by using a mould that can be left as jacketing after casting. The method includes the following method steps: placement of floating elements in the mould so that they at least partly is enclosed by the mould and so that at least a space is created between the mould and the floating element, and filling of the mould with cast so that the mould is bond to the floating element.
[00014] According to one embodiment the cast has an admixture of particles with a density lower than 1 kg/dm3.
[00015] According to another embodiment, a last section of the space can be filled with a cast of higher structural strength and/or higher density.
Brief description of drawings
[00016] Figure 1 discloses a mould when it is moved towards a floating element placed under a floating jetty.
[00017] Figure 2 discloses the mould of figure 1 when it is bound partly enclosing a floating element. [0001 8] Figure 3 discloses the mould adapted for use by a floating cofferdam.
Description of embodiments
[00019] Cast preferably refers to a cast based on cement or a concrete material which hardens in a water mixture. Preferably, the cast is mixed with particles with a density lower than 1 kg/dm3. This mixture is preferably of such a proportion that the cast as a whole has a density lower than 1 kg/dm3, which simplifies the use of the cast in methods as described in this application.
[00020] Floating elements preferably refers to floating elements comprising an expandable membrane suitable for filling of a gas, preferably air. The expandable membrane is preferably made of a polymeric material, which can be reinforced with a fiber material.
[00021 ] The invention is now described in detail, with reference to the accompanying drawings.
[00022] Figure 1 discloses a mould 1 according to one embodiment. The mould 1 comprises two opposite long sides 3a, b, two opposite short sides 4a, b and a bottom side 5. According to one embodiment the mould is somewhat conical, which simplifies the filling of cast and makes the press forces, which arises when the water surrounding a floating element 2 freezes, press the floating element 2 together with the added mould 1 upwards instead of pressing the mould 1 into pieces from the sides. According to one embodiment, the angle β between one short side and the bottom side is between 91 ° and 100° and/or the angle a between one long side and the bottom side is between 91 ° and 100°. The inside of the mould 1 (disclosed for example by 3b and 4a) is provided with distance elements, like plasticized distance bulges (not shown), which creates the play needed to surround the floating element 2 with the required amount of cast. The plasticized distance bulges provided on the inside of the sides of the mould 1 also aims to anchor the mould 1 against the floating element 2.
[00023] Since the mould preferably is left as jacketing enclosing the floating element 2 it should be produced by a material with a good resistance against the marine environment in which the mould 1 is to be used. Preferably the mould is produced by a polymeric material. According to one embodiment of the invention the mould is produced by fiber glass reinforced polyester. Thus, it is also possible to produce the mould from fiber glass reinforced epoxy, thermo plastic or metal, preferably aluminum or steel.
[00024] According to one embodiment the mould 1 is adapted so that it is possible for lifting element 6 to be fitted and attached to the outside of the bottom 5 of the mould 1 and to be locked by bands and hooks over the edge of the mould 1 . The lift element 6 is adapted to be filled with gas, such as air, by a filling means 7, such as a hose, coupled to a compressor and/or a pressure tank. By filling the lift element 6 with air, the amount of water displaced by the lift element 6 is increased, wherein the buoyancy of the lift element 6 is increased. According to one embodiment, the lift element ό comprises two interconnected rib shaped bags (not shown) adapted to be placed by the sides of the bottom to increase the stability when the mould is lowered below the water surface.
[00025] The mould 1 is bound to the floating element 2 either by locking elements placed on the inside of the mould 1 or by filling convex sides 3a, b, 4a, b with cast. According to one embodiment the locking elements are the plasticized distance bulges also used as distance elements. According to one embodiment the convex sides create the locking effect needed, at the same time as it is manufacturing advantageous since they also improves the clearance of the mould 1 from the shutter used during manufacturing of the mould 1 . [00026] On top of the mould 1 there is α filling channel 8, which simplifies the filling of the mould. The filling channel 8 can also be used to cast an anchorage frame in steel after the mould 1 had been filled. The anchorage frame can preferably be used for attachment of attachments that for example can be used to lock the anchors which anchors the floating element 2 and/or the floating jetty 1 1 by the sea/lake bottom or by land.
[00027] The mould 1 can be adapted in size to fit the floating element 2 it is supposed to be used with.
[00028] According to one embodiment, the reparation of the floating jetty is performed on the regular spot for the floating jetty 2, alternatively at another more suitable place in the water.
[00029] The method starts by launch of the mould 1 , pulling it to the place of assembly and filling it with water by use of a pump. Thereafter the lift element 6 is placed as a flat bag under the mould 1 and is locked with bands and hooks over the edge of the mould 1 . The lift element 6 comprises a filling means 7, such as a hose, which is connected to a compressor and/or a pressure tank. The lift element 6 is filled with a certain amount of gas until the mould 1 is weightless in the water. Thereafter the mould 1 is pulled in under the floating element 2 by the aid of steering ropes placed in each corner of the mould 1 . When the mould 1 is straight under the floating element 2, the lift element 6 is filled with additional amounts of gas so that the mould is lifted in place, enclosing at least parts of the floating element 2 to be repaired. This positioning presses most of the water out of mould 1 . The remaining water is pumped out of the mould 1 , which now has its open side above the water surface. The mould 1 is now kept in place by its buoyancy which makes it possible to release the lift element 6, pull it out and use it for the next assembly. The mould 1 is secured with straps over the jetty deck 10 which remains until the cast is completely hardened, where after the mould 1 remains as a jacketing enclosing the floating element 2.
[00030] If only a pump is used to remove the water it is also possible to perform the above described assembly of the mould without the aid of a lift element 6. The mould 1 can also be manufactured with a lifting element integrated in the mould 1 , for example by gluing a plate of cell material, such as EPS, to the inside of the mould.
[00031 ] When the mould 1 is placed surrounding at least parts of the floating element 2 to be repaired, and is emptied of water, it is filled with cast. According to one embodiment, the last section, i.e. the upper most part of the mould 1 , which according to one embodiment is the filling channel 8, is filled with a cast of higher strength and/or density, such as water proof concrete. The high strength concrete makes it possible to use this section as an anchorage frame onto which attachments is mould, which for example can be used to lock the anchors which anchor the floating element 2 and/or the floating jetty 1 1 by the sea/lake bottom or by land.
[00032] To level out the distribution of cast in the mould 1 a vibration stick is preferably placed in the cast. Alternatively, the mould can be subjected to gentle knocks from the outside, for example by a rubber hammer.
[00033] Figure 3 discloses an embodiment where a floating jetty of a larger model is repaired according to the method in the present invention. Larger floating jetties 12 is also denominated floating caissons 12 and they can, as the smaller floating elements, be manufactured out of a cell material and have an outer layer of concrete. However, it is also common that these floating caissons 12 are empty internally. Floating caissons 12 of this type is usually anchored with a chain 14, which normally is placed in a through-hole 13 in the floating caisson 12. The chain 14 is in its turn attached to anchoring elements 15 at the bottom. When repairing floating caissons 12 of this type using the method according to this invention, the anchoring device using hole 13 has to be considered. After the casting in the mold 1 according to the above explained method has been ended, a new hole is drilled through the new cast and the mould 1 . Thereafter a rope with a weight is released into the hole 13. The weight is captured at the outside of the floating caisson 12, where a pipe 1 8 is attached and pulled up through the hole 13. The pipe 1 8 comprises a collar 17, such as a square piece of metal, which is adapted to be attached with sealing compound at the bottom side 5 of the mould 1 . The pipe 1 8 is preferably grouted with water proof concrete and the chains 14, which must be dismantled during the application of the mould 1 , are again mounted. The pipe 18 and the collar 17 are preferably made of stainless steel which makes it possible to weld the collar 17 to the pipe 1 8. However, it is also possible that the pipe 18 and the collar 17 are made of aluminum, galvanized sheet or a thermo plastic material.
[00034] According to one embodiment, it is possible to perform the work according to the above mentioned methods from a jetty deck 10, placed on top of the floating elements, this eliminates the need of divers.
[00035] Due to the fact that the cast has a density lower than water, the buoyancy of the jetty is not affected in a negative way. Thus, the attachment of booms, gangways and attachments does not have to be altered.
[00036] It is also possible to manufacture a floating jetty 12 according to the below described method. The method relates to manufacturing of a floating jetty 12, by use of a mould 1 which can be left as mantling after casting. In the mould 1 floating elements 2 are places so that they are at least partly enclosed by the mould and so that at least a space is created between the mould and the floating element. In the space crated between the mould and the floating element the mould is filled with cast so that the mould is bonded to the floating element. Tentatively, the cast has a mixture of particles with a density lower than 1 kg/dm3 in order to increase the buoyancy of the floating element 2. The last section, i.e. the upper most part of the mould 1 , is filled with a cast of higher strength and/or density, serving as an anchorage frame onto which attachments are mould.

Claims

1 . A mould adapted to be used by a floating jetty, whereby the mould (1 ) is adapted to receive a hardening cast, characterized in that the mould (1 ) is adapted to anchor the mould (1 ) against a floating element (2), so that the mould ( 1 ) is left as mantling of the floating element (2) after the cast has hardened.
2. Mould according to claim 1 , wherein the mould (1 ) further comprises a fixation element placed on the inside of the mould (1 ) adapted to be a part of the fixation between the mould (1 ) and the floating element (2).
3. Mould according to any of the above claims, wherein at least one of the outer sides of the mould is convex so that the sides of the floating element (2) becomes convex after casting and thereby bonds the mould (1 ) to the floating element (2).
4. Mould according to any of the above claims, wherein the mould ( 1 ) also comprises at least one distance element adapted to create a space between the floating element (2) and the mould (1 ), a space which is adapted to receive a hardening cast.
5. Mould according to any of the above claims, wherein the mould (1 ) comprises two opposite long sides (3a, b), two opposite short sides (4a, b) and a bottom side (5).
6. Mould according to any of the above claims, wherein the mould comprises particles with a density lower than 1 kg/dm3.
7. Mould according to any of the above claims, wherein the mould has a density lower than 1 kg/dm3.
8. Mould according to any of the above claims 5, 6 and 7, wherein the bottom side (5) of the mould (1 ) is adapted to be in contact with a lifting element (6).
9. Method for reparation of a floating element by using a mould, characterized in that the method comprises the following method steps:
a. placing the mould (1 ), at least partly enclosing the floating element (2), so that at least one space is created between the mould (1 ) and the floating element (2) and
b. filling the space between the mould (1 ) and the floating element (2) with a hardening cast.
10. Method according to claim 9, wherein the placement of the mould (1 ) is performed from below.
1 1 . Method according to any of the above claims 9 and 10, wherein the step filling the space between the mould (1 ) and the floating element (2), includes filling of the space with a cast with a density lower than 1 kg/dm3 and thereby increasing the buoyancy of the floating element (2).
12. Method according to claim 10, wherein the placement of the mould (1 ) includes the following method steps:
a. positioning of the mould (1 ) in the water straight below the floating element (2),
b. placing of the lifting element (6) below the mould (1 ), and
c. filling of gas in the lifting element (6).
1 3. Method according to any of the above claims 9, 1 0, 1 1 and 1 2, wherein the method further includes the step of leaving the mould (1 ) as a mantling of the floating element (2).
14. Method to manufacture a floating jetty by use of a mould, characterized in that the method includes the following method steps:
a. placement of a floating element (2) in the mould ( 1 ), so that the mould at least partly encloses the floating element (2) and so that at least a space is created between the mould (1 ) and the floating element (2), and
b. filling of the space crated between the mould (1 ) and the floating element (2) with cast that hardens so that the mould is bonded to the floating element.
1 5. Method according to claim 14, wherein the step filling the space between the mould (1 ) and the floating element (2), includes filling of the space with a cast with a density lower than 1 kg/dm3 and thereby increasing the buoyancy of the floating element (2).
PCT/SE2009/051420 2008-12-19 2009-12-15 Arrangement and method for repairing and manufacturing floating jetties WO2010071570A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0802630-4 2008-12-19
SE0802630A SE533211C2 (en) 2008-12-19 2008-12-19 Device and method for repair of floating bridges

Publications (1)

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WO2010071570A1 true WO2010071570A1 (en) 2010-06-24

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106012802A (en) * 2016-05-30 2016-10-12 洛阳贝奇尔塑胶有限公司 Simple plastic floating bridge for rescue

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4318361A (en) * 1979-08-06 1982-03-09 Builders Concrete, Inc. Lightweight concrete marine float and method of constructing same
US4327656A (en) * 1979-12-14 1982-05-04 Einar Knutsen Floating docks
US5107785A (en) * 1990-12-07 1992-04-28 Baxter Hal T Floating dock and breakwater
US5215027A (en) * 1990-12-07 1993-06-01 Baxter Hal T Floating dock/breakwater and method for making same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4318361A (en) * 1979-08-06 1982-03-09 Builders Concrete, Inc. Lightweight concrete marine float and method of constructing same
US4327656A (en) * 1979-12-14 1982-05-04 Einar Knutsen Floating docks
US5107785A (en) * 1990-12-07 1992-04-28 Baxter Hal T Floating dock and breakwater
US5215027A (en) * 1990-12-07 1993-06-01 Baxter Hal T Floating dock/breakwater and method for making same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106012802A (en) * 2016-05-30 2016-10-12 洛阳贝奇尔塑胶有限公司 Simple plastic floating bridge for rescue

Also Published As

Publication number Publication date
SE0802630A1 (en) 2010-07-20
SE533211C2 (en) 2010-07-20

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