Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
  • B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
  • B29C39/10—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. casting around inserts or for coating articles
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
  • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
  • B29C70/74—Moulding material on a relatively small portion of the preformed part, e.g. outsert moulding
• • 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
• • E—FIXED CONSTRUCTIONS
  • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
  • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
  • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
  • E02D5/22—Piles
  • E02D5/60—Piles with protecting cases
• • E—FIXED CONSTRUCTIONS
  • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
  • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
  • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
  • E02D5/22—Piles
  • E02D5/64—Repairing piles
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
  • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
  • B29K2105/0002—Condition, form or state of moulded material or of the material to be shaped monomers or prepolymers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
  • B29L2031/00—Other particular articles
  • B29L2031/40—Test specimens ; Models, e.g. model cars ; Probes

Definitions

• the invention relates to a device for taking the impression of elements of submerged structures such as branching nodes for example, and to a method for taking the impression of such elements using this device.
• such a device implemented according to the method of the present invention, is advantageously suitable for the measurement of highly complex submerged structural elements, such as branching nodes of support elements, beams or tubes, supporting "off-shore” drilling platforms for example.
• Pig. 1 is an exploded view showing the device in the process of being assembled around a ramifications node.
• Fig. 2 shows the device assembled around said branch node.
• Fig. 3 is an exploded view showing the elements of polymerized material obtained using the device according to the invention and used for the 'reconstruction of the branch node.
• the device comprises rigid preformed formwork elements 7,8,9 ... cooperating in pairs by their edges 7a / 8a, 8b / 9b, 9c / 10c ... and one of the walls of which 11,12,13 ... forming a partition is arranged to bear by its edge on the surface of one or more elements 1,2,3,4 ... along their longitudinal axis.
• said shuttering elements constitute a compartmentalized enclosure 15 having passages 16,17,18 ... spanning the periphery of said elements 1,2,3,4 .. ..
• the construction of the device will preferably be designed in such a way that the upper surface of the enclosure is entirely free.
• the edges 7a, 8a, 8b, 9b ... will be suitably shaped: they may have male profiles, respectively female profiles, cooperating with the corresponding profile of the edge of the neighboring element, as illustrated in FIGS. 1 and 2.
• each of said formwork elements has, on at least part of its edges, one or more recesses arranged so as to coincide with one or more corresponding recesses of the neighboring formwork element, thus forming passages 16, 17,18 ...
• Said passages 16,17,18 ... are shaped so as to marry the periphery of one or more elements 1,2,3,4 ..., tubes or beams for example, of the submerged structure.
• the periphery of the passages 16,17,18 ..., the edge of the walls 11,12,13 ... of the formwork elements bearing on the elements 1,2,3,4 ... and, where appropriate, the edges 7a, 8a, 8b, 9b ... through which said formwork elements cooperate, are provided with elastic seals 23.
• Such seals have the effect of absorbing the inevitable disparities in construction according to plans and the real situation encountered on the spot. The practice will determine the amplitude of the variations to be thus absorbed, consequently the thickness of the seals 23 to be placed.
• Such seals are most generally made of elastic polymerized material, such as polyurethane foam, polypropylene, pol butadiene, natural or synthetic rubber for example.
• the formwork elements will preferably be made of a material having a density substantially close to that of the ambient liquid medium: it may be simple or composite materials, such as agglomerated wood, polyester reinforced with glass fibers for example, suitably ballasted if necessary with metallic elements.
• metallic elements such as agglomerated wood, polyester reinforced with glass fibers for example, suitably ballasted if necessary with metallic elements.
• steel formwork elements can also be used, the latter then being maintained in suspension using floats or, as far as possible, retained from the surface by cables or any other appropriate means.
• said elements pour ⁇ ront be further provided with additional attachment or gripping means 24, arranged for example at their upper end superior.
• the device comprises means 20 making it possible to fix together the formwork elements 7,8,9 ... assembled.
• Any suitable known means such as a latch, "clip”, screw system or bolt for example, can be used for such purposes. These means will be designed to temporarily assemble the formwork elements.
• the device comprises means 21 making it possible to bring to the lower zone of each of the compartments thus delimited a poly erisable liquid composition 22.
• means 21 it is possible for example to use a connected injection pump to a conduit whose lower end opens out near the bottom of the enclosure 15, inside the latter.
• the simplest solution consists in using a flexible hose, of sufficient diameter, bringing the liquid composition 22 from the surface.
• said liquid composition has a density ⁇ higher than the surrounding liquid medium.
• it is brought to the lower zone of each of the compartments of the enclosure 15, these then being gradually filled by the bottom, the liquid composition 22 driving the water upwards. , as it arrives.
• the density is adjusted in a way
• liquid composition also has the characteristic of polyerizing, under the conditions of the ambient environment, without shrinkage: it is on this condition that the fidelity of the molding thus practiced can be guaranteed, consequently the exac ⁇ titude of the measurements of the structural elements considered.
• the liquid composition must also have the characteristic of generating a polymerized mass 22 which does not adhere to the metal or to the concrete constituting the mass of the elements 1,2,3,4 ... This characteristic poses no problem, because it is in fact found in a large number of compositions generating polymerized material.
• liquid composition As a liquid composition according to the invention, it is advantageously possible to use mixtures with two components, generating epoxy resins or polyurethanes, optionally mixed with various additives such as ballast substances, polymerization retardants or dyes for example .
• the main thing is to obtain a liquid composition which polymerizes under water and whose characteristics can be adapted at any time to the requirements set out previously: the skilled person can easily do this, using commercial products. specialized.
• each of the compartments of the enclosure 15 thus delimited is filled with a liquid composition 22 polymerizing ' without shrinkage, from their lower zone;
• the polymerized mass 22 is released from the elements 1,2,3,4 ... with which it was in contact. In order for said polymerized mass to be separated into as many parts as there are compartments, it will be ensured that the maximum filling level of said compartments is located below the upper surface of the enclosure 15.
• the latter can be coated beforehand with a non-stick liquid film, such as a silicone oil for example.
• a non-stick liquid film such as a silicone oil for example.
• the same can be done with regard to the internal face of the shuttering elements or cover the latter with a polymer film having a weak adhesion with respect to the polymerized mass 22, a polyester sheet for example.
• Such operations are however not essential for the proper implementation of the invention.
• each of the compartments of the enclosure 15 may be provided, with means 25 allowing a pressurized fluid, compressed air for example, to be brought into contact with the surface of the structural elements intended to be taken from the polymerized mass 22.
• a pressurized fluid compressed air for example

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• Engineering & Computer Science (AREA)
• Structural Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Civil Engineering (AREA)
• Mining & Mineral Resources (AREA)
• Life Sciences & Earth Sciences (AREA)
• General Life Sciences & Earth Sciences (AREA)
• Mechanical Engineering (AREA)
• Paleontology (AREA)
• Chemical & Material Sciences (AREA)
• Composite Materials (AREA)
• Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
• Revetment (AREA)

Applications Claiming Priority (2)

Publications (1)

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Family Cites Families (5)

• 1986
  • 1986-12-01 EP EP19860906753 patent/EP0247099A1/de not_active Withdrawn
  • 1986-12-01 WO PCT/CH1986/000168 patent/WO1987003318A1/fr not_active Ceased

Non-Patent Citations (1)

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