WO2018196966A1 - Tuyau multicouche pour câble structural - Google Patents

Tuyau multicouche pour câble structural Download PDF

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Publication number
WO2018196966A1
WO2018196966A1 PCT/EP2017/059937 EP2017059937W WO2018196966A1 WO 2018196966 A1 WO2018196966 A1 WO 2018196966A1 EP 2017059937 W EP2017059937 W EP 2017059937W WO 2018196966 A1 WO2018196966 A1 WO 2018196966A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
layer
strake
heating element
ice
Prior art date
Application number
PCT/EP2017/059937
Other languages
English (en)
Inventor
Rachid Annan
Philipp Egger
Andreas Schwarz
Original Assignee
Vsl International Ag
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 Vsl International Ag filed Critical Vsl International Ag
Priority to PCT/EP2017/059937 priority Critical patent/WO2018196966A1/fr
Publication of WO2018196966A1 publication Critical patent/WO2018196966A1/fr

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D11/00—Suspension or cable-stayed bridges
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/14—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable
    • D07B1/147—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable comprising electric conductors or elements for information transfer
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00—Structural or constructional details of bridges
    • E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2083—Jackets or coverings
    • D07B2201/2084—Jackets or coverings characterised by their shape
    • D07B2201/2086—Jackets or coverings characterised by their shape concerning the external shape
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2083—Jackets or coverings
    • D07B2201/2088—Jackets or coverings having multiple layers
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2401/00—Aspects related to the problem to be solved or advantage
    • D07B2401/20—Aspects related to the problem to be solved or advantage related to ropes or cables
    • D07B2401/202—Environmental resistance
    • D07B2401/203—Low temperature resistance
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2501/00—Application field
    • D07B2501/20—Application field related to ropes or cables
    • D07B2501/2015—Construction industries
    • D07B2501/203—Bridges
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B5/00—Making ropes or cables from special materials or of particular form
    • D07B5/005—Making ropes or cables from special materials or of particular form characterised by their outer shape or surface properties
    • D07B5/006—Making ropes or cables from special materials or of particular form characterised by their outer shape or surface properties by the properties of an outer surface polymeric coating

Definitions

  • the present invention relates to the technical field of structural cables.
  • the present invention relates to pipes for housing strand bundles such as tensile members used in constructions comprising high strength steel cables that are applicable to masts, towers, bridges, footbridges, roofs for stadiums or other similar structures, wherein the pipe is suitable to prevent ice and snow accretion and for efficient ice/snow removal.
  • Bridge cables are particularly prone to ice (glaze or rime type) and snow (wet snow) accretion due to their inclined arrangement and cylindrical shape.
  • the thickness of the ice layer may exceed 15 mm in case of glaze ice or even 40 mm for wet snow accretions in extreme cases, hence posing a serious threat to users and the public when falling.
  • rheological limits of ice are the decisive factors for three physical phenomena of ice shedding: ice melting, ice sublimation and mechanical ice breaking. Ice melting and ice sublimation are relatively slow processes which reduce the mass of the ice at the cable surface gradually whereas mechanical ice breaking is a sudden process resulting in shedding of solid ice particles. Bridge cables are most commonly affected by a combination of these three effects. Depending on the thickness of the ice, the evolution of the ambient temperature over time, wind conditions, and mechanical impact or cable vibration, one of the three mechanisms becomes controlling and ice shedding occurs sooner or later with larger or smaller particle sizes.
  • Ice or snow prevention and removal systems can generally be classified into two categories, namely passive and active. While passive ice/snow prevention and removal systems utilise natural forces such as the wind, gravity, incidental radiation and temperature variations, active systems utilise external forces.
  • a first, simple known passive risk mitigation strategy has been used to equip bridges with external ice-monitoring devices, using cameras and sensors to monitor weather and icing conditions and to allow shut-down when there is a risk of ice shedding.
  • chain rings also cause wear and damages to bridge cables and pipes due to the high abrasive effects of the chain rings on the cable surface and their impact with the protrusions of strake profiles (which are known to be essential to control the risk of rain-wind-induced vibrations) on the outer surface of the cables/pipes.
  • An alternative to the chain rings active system could be a mechanical scraper system, wherein a plurality of brush devices are provided onto each and every bridge cable. These brush devices are capable of moving up and down along the cables in order to scrape off the ice or snow formed on the bridge cables. Such solution appears to be non-economical, as each and every bridge cable requires such a brush device to be installed and operated.
  • active ice and snow removal systems are inductive pulse de-icing where high electric impulses are used to shock heat and vaporize interface layer, or for instance the use of an inflation system for the expansion of pipe by air pressure or other solutions to break-off ice.
  • the inventors of the present invention have found out an effective solution for the above-discussed problems by introducing a new pipe as presently claimed. Thanks to the heating system provided to the multi-layered pipe, wherein one layer of the pipe has a lower thermal resistance to another layer of the pipe, the multi-layered pipe according to the present invention is configured in such a way to provide for a cost-effective and a reliable solution to the existing problems.
  • the proposed active sytem of ice and snow prevention and removal is achieved through the use of a heating element with a multi- layered pipe which allows to minimize the consumption of electrical energy.
  • the present invention allows to schedule ice removal operations in a more reliable manner making use of the improved ice retention.
  • the time needed for the ice and snow removal can thus be calculated and timed.
  • the present invention also reduces significantly the risk of having to close the entire bridge during removal by minimizing the size of the ice particles and allowing targeted de-icing of the cables in a defined sequence.
  • the proposed active system also allows the ice and snow to be removed at a specific schedule in a certain duration of time, for instance during off-peak time.
  • the first aspect of the invention relates to a multi-layered pipe for bridge cable for de- icing and/or snow removal, wherein the pipe comprises a tubular shaped wall, the pipe comprises at least a first layer and a second layer, wherein the first layer and the second layer are made of at least one material, wherein the first layer has a thermal resistance higher than the second layer, wherein the pipe further comprises at least one heating element.
  • the multi-layered pipe is configured in such a way that the pipe is provided with a heating element to remove accreted ice and snow in an active manner.
  • the pipe having a lower thermal resistance is provided as an outer layer such that heat can be efficiently transmitted to the outer surface of the wall.
  • the pipe having a higher thermal resistance is provided on the inside such as to prevent heat losses by insulating the heating element against the steel mass of the cable. Hence, ice and snow can be prevented or removed while minimizing energy consumption.
  • a thermal de-icing system as recited in claim 14.
  • the new system allows the proposed pipe to be integrated into different structures, thereby the new system is applicable in different constructions.
  • a method of manufacturing a multi-layered pipe for bridge cable comprising the steps of (a) providing at least a first layer and a second layer, forming the wall of the multi-layered pipe, wherein the first layer and the second layer are made of at least one material; (b) providing a heat-generating heating element on or within wall of the pipe.
  • the first layer is completely encircled by the second layer, in which the heating element is provided to the first layer, the second layer or there between, or the heating element is embedded into the wall of the pipe.
  • the multi-layered pipe allows the multi-layered pipe to have a lower thermal conductivity or a higher thermal resistance on one side of the pipe, thus allowing the heat to be radiated to the opposite side, thereby reducing the amount of heat required for preventing ice formation on cables and/or removing ice and snow on cables.
  • the layer having a lower thermal conductivity or a higher thermal resistance is provided closer to the strand bundles that are housed within the pipe whereas the layer having a higher thermal conductivity or a lower thermal resistance is arranged at the outer periphery of the wall of the pipe.
  • the pipe further comprises a third layer, wherein each layer is completely encompassed by another layer, forming an innermost layer, a middle layer and an outermost layer, wherein the innermost and the outermost layer are made of the same or different material, for instance High Density Polyethylene (HDPE), whereas the middle layer is provided with for instance a polyurethane foam, wherein the heating element is provided in the middle layer close to the outermost layer.
  • HDPE High Density Polyethylene
  • the middle layer is provided with for instance a polyurethane foam
  • Such configuration allows the heat generated by the heating element to be transferred more efficiently to the outer surface of the wall such that the ice and snow can be removed while less heat is transmitted to the internal components of the pipe such as tendons comprising strand bundles.
  • Such configuration may be easier to be manufactured, as the heating element can be first inserted into the pipe before filling up with filling material, for instance the polyurethane foam or polyethylene foam.
  • the heating element is provided longitudinally at least partially along the pipe, wherein the heating element is a heating wire or a band heater.
  • the heating element is cost- efficient, light weight, easily replaceable and can be configured such that only certain regions of the cables are being heated.
  • one or more channels are provided to the first layer and/or the second layer of the pipe or there between for accommodating the heat-generating heating element. This allows the heating element to be replaceable or installed easily in the pipe. Moreover, the heat generated by the heating element can also be transferred and radiated outwards efficiently thanks to these channels.
  • the heating element has a heating power of less than 100W/m, preferably less than 50W/m, preferably less than 30W/m or more preferably around 20W/m.
  • Such heating power values allow different ranges of heat to be generated accordingly by the heating element.
  • the heating element has a diameter of between 1 to 50 mm, preferably between 2 to 30 mm, between 3 to 10 mm or more preferably around 5 mm.
  • Such diameters of the heating elements has the advantage of ensuring that the diameter of the multi-layered pipe of the present invention does not become significantly larger than for a conventional structural cable.
  • the diameter of the pipe of the present invention does not exceed 50 %, 30 %, 15 % or 10 % compared to the conventional structural cables which typically have a diameter in the range of from 80mm to 600mm.
  • one or more channels are provided longitudinally at least partially along the pipe for accommodating the heat-generating heating element, wherein the channels comprises air and/or liquid, wherein the air and/or liquid is heated by the heating element in such a way that the heat is transferred efficiently towards the outer surface of the wall.
  • the heated air or liquid generated by the heating element can circulate through the channels provided to the multi-layered pipe via for example a high pressure system.
  • the heating element is provided for ice shedding having a shedding differential temperatures of less than 100 K, preferably less than 50 K, 15 K, 10 K or 5 K. Such differential temperatures are sufficient to provide for an efficient active system of ice shedding on structural or bridge cables.
  • the tubular shaped wall has an outer surface and an inner surface, wherein the outer surface is provided with one or more strakes, grooves or dimples.
  • Such surface features provided on the outer surface of the wall not only show an improved behaviour against rain-wind induced vibrations, they also allow ice layers to be retained longer on the pipe which allow some initial melting before the ice drops.
  • Such profiles also break up the structure of the ice into sections of different thickness which causes fragmentation of the ice. Such profiles reduce the weight of the ice fragments that eventually drop. Similar effects have been demonstrated whether dimples, grooves or strakes are provided on the outer surface of the wall.
  • the groove is in form of a circular shape, an oval shape, a mixture of predetermined shapes or a channel
  • the strake forms a protrusion for reducing rain and wind induced vibrations
  • the strake has a height being a distance from a strake root part connected to the outer surface of the pipe and a strake end part terminating the strake outwards away from the pipe, the strake having a width being transverse to the height, the width decreasing in the direction from the strake root part towards the strake end part, wherein the height is less than 5 percent of the diameter of the pipe.
  • the strake is arranged to form a helical pattern, a periodic pattern or a predetermined pattern.
  • Predetermined patterns of strakes can be customised into different profiles such that the strakes are used according to different needs.
  • a helical pattern is easy to manufacture compared to a periodic pattern, while a periodic pattern can be more efficient in removing ice chunks in smaller pieces.
  • the strake has a length transverse to the height and the width and along which length the strake is connected to the pipe, the length of each strake being equal or less than the circumference of the outer surface of the pipe, or less than half of the circumference of the outer surface of the pipe.
  • Such strakes also allow smaller pieces of ice to be melted and dropped from the pipe as they melt.
  • the strake comprises a first strake surface portion facing away from the pipe, the first strake surface portion being concave.
  • the concave surface improves the aerodynamic properties of the pipe or cable, whereby rain and wind induced vibrations are minimized by ramping any water present on this outer surface of the pipe away from the surface and eventually spraying the water off at the tip of the strake. This can reduce the amount of water that can freeze to the cable surface.
  • the strake may also be straight for easy manufacturing.
  • the longitudinal direction of the strake extends in a direction substantially orthogonal to the longitudinal direction of the pipe. This allows ice fragments to be retained longer due to the strake profiles and arrangements.
  • the method further comprises the step of (a) providing a third layer, wherein each layer is completely encompassed by another layer, forming an innermost layer, a middle layer and an outermost layer; (b) providing the heating element in the middle layer close to the outermost layer.
  • Figure 1 is a schematic cross section overview of the pipe according to a first embodiment of the present invention.
  • Figure 2 is a schematic cross section overview of the pipe according to a second embodiment of the present invention.
  • Figure 3 is a schematic cross section overview of the pipe according to a third embodiment of the present invention.
  • Figure 4 is a perspective overview of the pipe according to a fourth embodiment of the present invention.
  • Figure 5 is a schematic cross section overview of the pipe according to the fourth embodiment of the present invention.
  • FIG. 1 illustrates a schematic cross-section overview of a multi- layered pipe 1 for structural cable according to a first embodiment of the present invention.
  • the multi-layered pipe 1 comprises a tubular shaped wall 25, wherein a plurality of strand bundles 22 are contained therein.
  • the wall 25 is made up of two layers, namely a first layer 10 and a second layer 20.
  • the first layer 10 is completely encircled by the second layer 20, wherein a plurality of heating elements 30 are provided in between the first 10 and the second layer 20. More specifically, the heating elements 30 are provided at the first layer 10 which is the innermost layer, within a plurality of voids or channels 35 which are provided for accommodating the heating elements 30.
  • the heating elements 30 can also be embedded within the first layer 10.
  • the first layer 10 is located closer to the strand bundles 22 housed within the pipe 1 and it has a lower thermal conductivity or a higher thermal resistance compared to the second layer 20.
  • Such configuration ensures that the strand bundles 22 are being shielded from the heat generated by the heating elements 30.
  • the heat can thus be efficiently radiated outwards such that accreted ice and snow on structural cables/pipes can be removed in a controlled and a timed manner through heat flow.
  • the multi-layered pipe 1 of the present invention comprises at least a first layer 10 and a second layer 20, wherein the first and second layers 10, 20 can be made of different materials with different thermal conductivities/thermal resistance; or of the same material but with different wall thicknesses.
  • the first layer and the second are made of the same material, the first layer having a higher thermal resistance than the second layer can be realised through for example having a thickness higher than the second layer.
  • FIG. 2 shows a schematic cross-section overview according to the second embodiment of the present invention.
  • the second embodiment is largely similar to the first embodiment with the exception that a plurality of heating elements 30 are provided at the second layer 20 of the wall 25 which has a lower thermal resistance compared to the first layer 10.
  • a plurality of channels 35 or voids can be provided around the periphery of the wall 25 within the second layer 20 of the multi-layered pipe 1 in order to accommodate the heating elements 30.
  • Such configuration maybe a preferred embodiment as unnecessary heat loss can be avoid through the first layer 10 having a higher thermal resistance or a lower thermal conductivity. Therefore, heat flows towards the second layer 20 and thereby reduces the heat transmission towards strand bundles 22 which are housed within the pipe 1 .
  • the heating element 30 can be embedded directly into the second layer 20, wherein channels or voids are not being provided.
  • the channels 35 or voids may be provided at any layer or locations of the multi-layered pipe 1 such that the heating element 30 can be accommodated therein to heat the pipe 1 directly (for instance with heating wires) or indirectly (for example with warm air and/or liquid).
  • the heating wire in the channels 35 can be replaceable easily when the heating wire is placed in the channels 35 or voids and not being embedded.
  • FIG. 3 shows another embodiment according to the present invention, wherein a further third layer 50 is provided to the multi-layered pipe 1 .
  • each layer is completely encompassed by another layer, thereby forming an innermost layer, a middle layer and an outermost layer. It can also be foreseen that not the entire layer is encircled by another layer but such example also gives the same technical effect of transmitting heat efficiently towards the outer surface of the wall.
  • the first layer 10 forms an innermost layer
  • the second layer 50 forms a middle layer
  • the third layer 20 forms an outermost layer.
  • All three layers may be made of a similar material.
  • the innermost and the outermost layers 10, 20 are made of the same material, for instance High Density Polyethylene (HDPE)
  • the middle layer 50 is provided with for instance a polyurethane foam, wherein the heating elements 30 are provided in the middle layer 50 close to the outermost layer 20.
  • the middle layer 50 may have a larger thickness compared to the other two layers.
  • the heating elements 30 provided in the middle layer 50 close to the outermost layer 20 has the advantage that outer surface 28 or the pipe 1 can be heated more easily compared to the strand bundles 22 housed within the pipe 1 .
  • all three layers may be made of different materials or different thicknesses.
  • a total number of six heating elements 30 are provided on the periphery circumference of the wall 25.
  • any number of the heating elements 30 are provided to the pipe 1 , for instance ranging from 2, 4, 8, 10, 20 or more.
  • the heating element 30 can also be provided at only a certain region of the circumference of the wall (for instance arc sector positions where ice and snow tend to
  • each and every heating element 30 can be individually controlled and their outputs can be varied from each other.
  • Figure 4 shows a perspective view according to a further embodiment of the present invention.
  • the multi- layered pipe 1 comprises a tubular shaped wall 25 having an inner surface 27 and an outer surface 28, wherein a plurality of strake elements 40 are provided on the outer surface 28 of the wall 25.
  • all strakes 40 are arranged orthogonally to the longitudinal direction of the pipe 1 , wherein the plurality of strakes are arranged in a way to resemble helical shape, as can be seen in the Figure 4.
  • a combination of a passive system (ice retention mechanism having a plurality of strake elements 40) and an active system (heating elements 30) are provided to the pipe for structural
  • the strake profiles 40 gives an improved retention of ice and snow, thus targeted lane closures can be achieved while minimally affecting the traffic flows.
  • the heating element 30 can be a heating wire or a band heater placed between or on the multi-layered pipe 1 or embedded within the multi-layered pipe 1 .
  • the strakes 40 which are in form of protrusions provided on the outer surface 28 of the wall 25 enable ice and snow to be retained longer at the pipe outer surface 28. Due to the geometries and arrangements of the strakes 40, a series of stronger and weaker areas (or uneven thickness) of the frozen ice and snow are created on the pipe. When the heating elements 30 are activated, smaller pieces of ice fragments are thus created and are shed from the multi-layered pipe 1 .
  • the strakes as incorporated herein have been well described in the patent specifications of WO2014/001514 and WO2014/001515.
  • Said patent applications described outer surface of a cable being provided with the said strake profiles.
  • the strake profiles 40 can be provided in different forms as well as can be arranged extending along the longitudinal direction of the pipe or orthogonally to the longitudinal direction of the pipe.
  • Such patterns and arrangements provided on the outer surface of the structural or bridge cables are advantageous as they show an improved behaviour against rain-wind induced vibrations, which is an effect where cable starts to vibrate due to oscillation of the water rivulets formed on a plain cylinder at the top and bottom of the cross section.
  • the inventors of the present invention surprisingly found out that despite the advantages provided by the aforementioned strakes for reducing the rain-wind induced vibrations, the solution is not sufficient to overcome the problem posed for ice and snow accretion on structural cables. Although these protrusions or strakes indirectly allow more ice and snow to be retained on the outer surface of the cables, the bridge has to be closed at a point for ice and snow removal when the accumulation reaches a maximum level or could pose a danger to the road users.
  • the active system espoused in the present invention in combination with the strake profiles 40 provides for a cost-effective, reliable and safe solution for a problem that has not yet been solved by the profession in the art.
  • Ice shedding through the present invention can be controlled and scheduled accordingly, for example ice shedding can be performed during low traffics hours or in a more controllable fashion, since the active system of the present invention allows such procedure to be carried out according to the needs.
  • ice layer is particularly weakened by the presence of these protrusions 40 which results in a reduction of the size and mass of the ice particles that drop once ice-shedding occurs.
  • This effect is especially pronounced compared to other conventional strake profiles such as a single or a double helical shape or a ring shape.
  • the strake elements 40 arranged in such a manner as shown in Figures 4 and 5 surprisingly shed ice into smaller fragments, when the heating element 30 is activated.
  • heat insulating blanket can be used to wrap around the strand bundles 22 and compliment or replace the innermost pipe layer whereas the heating element 30 such as the heating wires are provided in between or on the multi-layered pipe 1 .
  • Such wrapping ensures less heat can be transferred to the strand bundles in order to minimize heat loss.
  • Such heat insulating blanket ensures a smaller thickness (hence lighter weight) of the pipe can be realised.
  • Such pipe not only reduces cost but also allows easier construction in case cables are prefabricated.
  • the currently proposed active de-icing system can entirely be controlled remotely. Hence, contrary to the other active de-icing system where chain rings are required to be brought back to the top of the bridge by rope access technicians, such risk does not exist in the present invention. Moreover, due to the existence of the strake elements 40 which may be provided on the outer surface 28 of the wall 25, other active systems involving the mechanical removing mechanisms are not suitable to be combined with the passive system.
  • present invention provides an ingenious solution to overcome the formulated problem, whereby a heating element 30 is provided to the pipe 1 such that the active system can be combined with the passive system (strakes) in order to provide for a synergistic effect.
  • the heating element 30 used in the present invention can either be used to produce heat continuously or intermittently for example through the heating wire or band heater during periods of high icing risk to prevent any accretion of snow or ice in the first place.
  • the heating element 30 may be provided on the outer surface 28 of the pipe 1 , or on the inner surface 27 of the pipe 1 , or housed within the channels 35 provided on/in the pipe 1 , or embedded within the multi-layered pipe 1 .
  • heat can be introduced either by blowing hot air into the available void between the high tensile steel strands and the outer pipe enclosing the cable or by embedding heating wires directly into the pipe.
  • the channels 35 or voids provided within the first layer 10, the second layer 20 or there between 10, 20 can be used to provide a good solution for the circulation of heated air and/or liquid within the pipe 1 .
  • FIG. 5 is a schematic cross-section overview of the Figure 4.
  • the multi-layered pipe 1 appears to be similar to the Figure 1 but with the only difference is that a plurality of strake elements 40 are provided on the outer surface 28 of the pipe 1 . It can be easily foreseen that despite providing the heating elements 30 in the first layer 10 as shown in the Figure 5, the heating element 30 can of course be provided in any layers or anywhere or embedded within the wall of the pipe 1 .
  • At least one and “one or more” as used herein are interchangeable and relate to at least 1 and include 1 , 2, 3, 4, 5, 6, 7, 8, 9 and more.
  • the invention has been described broadly and generically herein. Each of the narrower species and sub-generic groupings falling within the generic disclosure also form part of the invention. This includes the generic description of the invention with a proviso or negative limitation removing any subject matter from the genus, regardless of whether or not the excised material is specifically recited herein.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Structures (AREA)

Abstract

L'invention concerne un tuyau multicouche (1) pour un câble structural, un système et un procédé associés, comprenant une paroi de forme tubulaire (25), le tuyau (1) comprenant au moins une première couche (10) et une seconde couche (20), la première couche (10) présentant une résistance thermique supérieure à la seconde couche (20), le tuyau (1) comprenant en outre au moins un élément chauffant généré thermiquement (30). La présente invention combine un système passif et actif de dégivrage et de déneigement afin d'éliminer l'accumulation de glace et de neige sur des câbles structuraux d'une manière rentable et efficace tout en nécessitant une consommation minimale d'énergie.
PCT/EP2017/059937 2017-04-26 2017-04-26 Tuyau multicouche pour câble structural WO2018196966A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2017/059937 WO2018196966A1 (fr) 2017-04-26 2017-04-26 Tuyau multicouche pour câble structural

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2017/059937 WO2018196966A1 (fr) 2017-04-26 2017-04-26 Tuyau multicouche pour câble structural

Publications (1)

Publication Number Publication Date
WO2018196966A1 true WO2018196966A1 (fr) 2018-11-01

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110004828A (zh) * 2019-03-26 2019-07-12 江苏法尔胜缆索有限公司 一种防结冰、除冰的热挤聚乙烯平行钢丝拉索体系及其制备方法
CN110438898A (zh) * 2019-08-16 2019-11-12 威胜利工程有限公司 防冰冻危害斜拉索
CN111305068A (zh) * 2020-02-19 2020-06-19 湖北工业大学 一种用于斜拉索的防风雨激振装置及施工方法
CN111305069A (zh) * 2020-03-03 2020-06-19 合肥工业大学 一种斜拉桥抗结冰系统
WO2020144489A1 (fr) 2019-01-07 2020-07-16 Soletanche Freyssinet Gaine pour câble structural

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08296206A (ja) * 1995-04-26 1996-11-12 Hitachi Zosen Corp ケーブル
JP2006322177A (ja) * 2005-05-18 2006-11-30 Docon Co Ltd 斜張橋の斜材ケーブル用融雪装置及び斜材ケーブル用融雪装置の設置方法
JP2008190194A (ja) * 2007-02-05 2008-08-21 Docon Co Ltd 斜張橋ケーブル用融雪装置
WO2014001515A1 (fr) 2012-06-28 2014-01-03 Danmarks Tekniske Universitet Construction et élément de tension comprenant un câble et une pluralité de listons
WO2014001514A1 (fr) 2012-06-28 2014-01-03 Danmarks Tekniske Universitet Construction et élément de tension comprenant un câble et un ou plusieurs listons
CN105862591A (zh) * 2016-04-08 2016-08-17 湖北工业大学 一种碳纤维桥梁缆索化冰结构

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08296206A (ja) * 1995-04-26 1996-11-12 Hitachi Zosen Corp ケーブル
JP2006322177A (ja) * 2005-05-18 2006-11-30 Docon Co Ltd 斜張橋の斜材ケーブル用融雪装置及び斜材ケーブル用融雪装置の設置方法
JP2008190194A (ja) * 2007-02-05 2008-08-21 Docon Co Ltd 斜張橋ケーブル用融雪装置
WO2014001515A1 (fr) 2012-06-28 2014-01-03 Danmarks Tekniske Universitet Construction et élément de tension comprenant un câble et une pluralité de listons
WO2014001514A1 (fr) 2012-06-28 2014-01-03 Danmarks Tekniske Universitet Construction et élément de tension comprenant un câble et un ou plusieurs listons
CN105862591A (zh) * 2016-04-08 2016-08-17 湖北工业大学 一种碳纤维桥梁缆索化冰结构

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020144489A1 (fr) 2019-01-07 2020-07-16 Soletanche Freyssinet Gaine pour câble structural
CN110004828A (zh) * 2019-03-26 2019-07-12 江苏法尔胜缆索有限公司 一种防结冰、除冰的热挤聚乙烯平行钢丝拉索体系及其制备方法
WO2020191984A1 (fr) * 2019-03-26 2020-10-01 江苏法尔胜路桥科技有限公司 Système de câble en fils d'acier parallèles recouvert en polyéthylène extrudé à chaud anti-givrage et dégivrage et son procédé de préparation
CN110438898A (zh) * 2019-08-16 2019-11-12 威胜利工程有限公司 防冰冻危害斜拉索
CN111305068A (zh) * 2020-02-19 2020-06-19 湖北工业大学 一种用于斜拉索的防风雨激振装置及施工方法
CN111305069A (zh) * 2020-03-03 2020-06-19 合肥工业大学 一种斜拉桥抗结冰系统

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