EP3027821A1 - Élément de traction protégé contre la corrosion et disque déformable plastiquement constitué d'un matériau anticorrosion pour un élément de traction de ce type - Google Patents

Élément de traction protégé contre la corrosion et disque déformable plastiquement constitué d'un matériau anticorrosion pour un élément de traction de ce type

Info

Publication number
EP3027821A1
EP3027821A1 EP14744855.9A EP14744855A EP3027821A1 EP 3027821 A1 EP3027821 A1 EP 3027821A1 EP 14744855 A EP14744855 A EP 14744855A EP 3027821 A1 EP3027821 A1 EP 3027821A1
Authority
EP
European Patent Office
Prior art keywords
tension
disc
tension member
plastically deformable
corrosion protection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP14744855.9A
Other languages
German (de)
English (en)
Other versions
EP3027821B1 (fr
Inventor
Werner Brand
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dywidag Systems International GmbH
Original Assignee
Dywidag Systems International GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dywidag Systems International GmbH filed Critical Dywidag Systems International GmbH
Publication of EP3027821A1 publication Critical patent/EP3027821A1/fr
Application granted granted Critical
Publication of EP3027821B1 publication Critical patent/EP3027821B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/08—Members specially adapted to be used in prestressed constructions
    • E04C5/12—Anchoring devices
    • E04C5/122—Anchoring devices the tensile members are anchored by wedge-action
    • 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
    • E01D19/14—Towers; Anchors ; Connection of cables to bridge parts; Saddle supports

Definitions

  • plastically deformable disc made of anti-corrosion material
  • the invention relates to a corrosion-protected tension member, comprising a plurality of tension members and an anchor device with an anchor element, which has certain through holes for the passage of the tension elements, with the tension elements is in receiving from these tensile forces connection and trained and determined, these tensile forces indirectly or forward directly to a parent structure, at least one elastically compressible sealing disc, which is arranged on the side facing away from the free ends of the tension elements of the anchor element and for the passage of the tension elements has certain through holes, and a support means on the side facing away from the anchor element of the at least one Sealing disc is arranged and has certain through holes for the passage of the tension elements.
  • Such corrosion-protected tension members are used, for example, as tendons, in particular for prestressed concrete structures, for example bridges, containers or towers, or as stay cables, in particular for cable-stayed structures, in particular cable-stayed bridges, extra-stretch bridges or arch bridges.
  • a tension member of the type mentioned in which in a preassembled, but not yet under tension condition of the tension member between the anchor member and the at least one sealing disc at least one plastically deformable disc of corrosion protection material! is arranged.
  • the invention makes use of the fact that in order to activate the sealing effect of the at least one sealing disk by means of the support means, a surface force directed essentially in the direction of elongation of the tension elements must be exerted on the at least one sealing disk.
  • a surface force directed essentially in the direction of elongation of the tension elements must be exerted on the at least one sealing disk.
  • the aforesaid surface force can be generated independently of tensioning of the tension elements, for example by compressing the anchor element, which compresses at least one plastically deformable disc, the at least one sealing disc and the support device by means of a compression device.
  • This compression device may comprise a plurality of threaded rods which pass through the aforementioned elements and are threadedly engaged with the free surface of the anchor member and the free surface of the support means with threaded nuts.
  • the at least one plastically deformable pane of corrosion protection material in the preassembled, but not yet set under tension state of the tension member is applied directly to the anchor element.
  • a pre-filling of the gaps and cavities to be filled with anticorrosion agents can be brought about by the fact that the at least one plastically deformable disc of anticorrosion material is designed as a solid disc. Since the at least one plastically deformable disc of corrosion protection material as a solid disc has no through holes, in particular no through holes for passing the tension elements, they must be the plastically deformable disc during assembly pierced, whereby they are wetted on its outer surface with corrosion protection Materiai. During assembly, it is possible, for example, to proceed by initially forming the stack arrangement of support device, which forms at least one sealing disk and the at least one plastically deformable disk, and then threads the tension element through this stack arrangement.
  • the at least one plastically deformable disc of anti-corrosion material for the passage of the tension elements has certain through holes.
  • the tension elements can be mounted first and then the support means, the at least one sealing disc and the at least one plastically deformable disc are threaded onto the tension elements.
  • any material having anticorrosive properties can be used as a corrosion protection material.
  • the cone penetration of the corrosion protection material at a temperature of 25 ° C between about 60 * 0, 1 mm and about 100 * 0, 1 mm. Corrosion protection material with a cone penetration above this range of values makes it difficult to produce a plastically deformable disk which can be handled easily on the construction site, while full penetration of the cracks and cavities with corrosion protection material is more difficult for a cone penetration below this value range.
  • the corrosion protection material is microcrystalline wax.
  • a suitable microcrystalline wax can be obtained, for example, under the trade name NONTRIBOS® VZ-inject from the company August Gähringer Carl Gähringer eK Factory of Technical Oils & Fats.
  • petroleum jelly and other petrolatum-based, permanently plastic anticorrosive materials may also be used.
  • the volume of corrosion protection material per tension element at least equal to the product of the length of the anchor element in the longitudinal direction of extension of the tension elements and the annular surface between the tension element and the through hole in the anchor element, through which the tension element is passed.
  • the value of the annular surface between about 30 mm 2 and 180 mm 2 amount.
  • the modulus of elasticity of the at least one sealing disk and the resistance of the at least one plastically deformable disk to plastic deformation in each case in relation to a compressive force acting in the longitudinal direction of the tension elements are coordinated such that the boundary surfaces of the through holes of the at least one sealing disk bear sealingly against the tension elements before the at least one plastically deformable disk has been deformed by more than 5% of its measured thickness in the longitudinal direction of the tension elements.
  • the at least one plastically deformable disc is assigned at least one resistance element that increases its resistance to plastic deformation.
  • the at least one resistance element can be formed, for example, by an elastically and / or plastically deformable element.
  • the at least one resistance element be embedded in the corrosion protection material or the at least one plastically deformable disc, for example in the form of a ring, surrounded. Regardless of the exact design and arrangement of the at least one resistance element, it is considered in the context of the present invention as belonging to the at least one plastically deformable disc of corrosion protection material.
  • the problem of undesired leakage of corrosion protection material due to the plastic deformation of the at least one plastically deformable disc may also be on Üer facing away from the at least one sealing disc side of the at least one plastically deformable disc.
  • the anchor element has a punch portion which engages in a sleeve in the preassembled, but not yet tensioned state of the tension member, in which the at least one plastically deformable disc, the at least one sealing washer and the support means are received.
  • the engagement of the stamp portion of the anchor element in the sleeve forms a seal which at least complicates, if not completely prevents, the undesired leakage of corrosion protection material.
  • the sleeve may be in power transmission with the parent structure, for example be embedded in the parent structure, and at its end facing the anchor element having a contact flange on which the armature element in the fully assembled and tensioned state of the tension member is applied force-transmitting.
  • the above-mentioned building fixed bearing shoulder can be formed on this sleeve.
  • the anchor element is operatively connected to a sleeve in which the at least one plastically deformable disc, the at least one sealing washer and the support means are accommodated.
  • a contact element be provided, is soft with the parent structure in power transmission and at which in the fully assembled and tensioned state of the tension member, the armature element or a force-transmitting element operatively connected to this force-transmitting element is applied. Both firm connections of this embodiment can be realized by integral training, screwing, welding or other suitable manner.
  • the at least one plastically deformable disc, the at least one sealing disc and the support means are guided with their outer peripheral surfaces on an inner surface of the sleeve.
  • the sleeve can be made of metal, preferably steel, for example as a cast part.
  • first embodiment variant is suitable, for example, for producing surface power according to the above-explained second alternative
  • second embodiment variant is suitable, for example, for producing surface power according to the first alternative explained above.
  • the support means may be formed only by a spacer disc, which may be made, for example, of plastic, in particular polyethylene.
  • the spacer disc can be made of metal, for example steel.
  • the support means in addition to the spacer disc also includes a pressure plate, which is made of metal, for example steel, for example.
  • tension elements of the tension member according to the invention may be known per se tension elements.
  • so-called mono Strands are used as tension elements.
  • Under a monolayer is understood to be a single strand formed from seven wires, which is surrounded by a sheath made of plastic, preferably polyethylene, wherein the space between the wires and the sheath with corrosion protection material, such as corrosion protection grease is filled.
  • strands which are coated with synthetic resin for example epoxy resin (so-called epoxy strands).
  • these two types of tension members differ mainly in that, where the monostrands where the tensile forces between the tension elements and the anchor element transmitting ring wedges are arranged, the plastic jacket must be removed while leaving the resin coating in the epoxy strands can be.
  • a sleeve-shaped retaining element can be arranged between the end of the plastic casing and the force transmission point of each tension element.
  • the passage holes formed in the anchor element in a stepped manner for the tension elements, wherein the step forms a retaining surface for the plastic casing. The former case has the advantage that the replacement of individual tension elements is readily possible.
  • the at least one sealing disc can be made of a soft rubber, for example nitrile-butadiene rubber (NBR rubber, for example known under the trade name Perbunan®) or chloroprene rubber (CR rubber).
  • NBR rubber for example known under the trade name Perbunan®
  • CR rubber chloroprene rubber
  • the invention furthermore relates to a plastically deformable pane made of anti-corrosion material intended for use in a corrosion-protected tension member according to the invention and designed.
  • Figure 1 shows a longitudinal section through an inventive tension member, which can be used as a tendon, in particular for prestressed concrete structures, in its fully assembled and tensioned state;
  • Figure 2 is a longitudinal section of the tension member of Figure 1 in its preassembled, but not yet tensioned state;
  • Figures 3 and 4 are longitudinal sections similar to Figures 1 and 2 of another tension member according to the invention, which can be used as a stay cable especially for cable-stayed structures.
  • a tendon 10 as it can be used in particular for prestressed concrete structures, such as bridges, tanks or towers, shown as a first embodiment of a corrosion-protected tension member according to the invention in his concrete in the prestressed concrete structure 12 fully assembled and tensioned state.
  • the clamping member 10 includes a plurality of members 14, each of which may be formed by a synthetic resin coated steel wire strand.
  • a synthetic resin coated steel wire strand For example, epoxy resin can be used as the synthetic resin, with the tension elements 14 in this case being referred to briefly in the jargon as "epoxy strands".
  • the tension elements 14 are connected to an anchor plate 16, for example, made of steel in tensile force transmitting connection.
  • the armature disc 16 is provided with a plurality of through holes 18, each having an inner cylindrical portion 18 a, which the side facing away from the prestressed concrete structure 12 side merges into a conical section 18b.
  • Each of the conical sections 18b serves to receive a multipart ring wedge 20, which surrounds the associated tension element 14 positively and non-positively and has the task of transmitting the tensile forces from the tension element 14 to the armature disk 16.
  • the armature disk 16 is supported on the outer surface 12a of the structure 12 via an abutment flange 22a of an essentially tubular anchor body 22, which is concreted into the structure 12 and can be manufactured, for example, as a cast part, in particular of cast iron.
  • the anchor body 22 forms from the surface 12a of the structure 12, starting in the direction of the structure 12 into a tubular shell for the tension elements 14, which can be extended if desired in the direction of the structure 12 by means of another tube 24.
  • the further tube 24 for example, a smooth or a profiled
  • Plastic pipe in particular polyethylene pipe, a metal pipe or the like can be used.
  • the traction elements 14, which run slightly obliquely in the interior of the structure 12 relative to the traction axis A of the tension member 10, are deflected by means of a spacer disc 26 arranged within the anchor body 22 in such a way that they pass through the armature disc 16 substantially parallel to the traction axis A.
  • the spacer disc 26 is provided with a plurality of correspondingly formed through-holes 26a.
  • the spacer disk 26 can be made, for example, of plastic, in particular polyethylene.
  • the sealing disc 28 may be made, for example, of a soft rubber, for example nitrile-butadiene or chloroprene rubber.
  • the sealing disc 28 in the assembled and tensioned state of the tension member 10 according to the invention, the sealing disc 28 is supported on the spacer disc 28.
  • the spacer disk 26 can in turn be supported indirectly or directly on the anchor body 22. In the illustrated Anlagensbeispie! For example, it is supported on an inner annular shoulder 22b of the anchor body 22. If the internal stability of the spacer disc 26, for example, due to a too large diameter, this insufficient, so could between the spacer disc 26 and the annular shoulder 22 b additionally one, preferably made of metal, support disk are provided.
  • a plastically deformable disk 30 made of anticorrosion material is furthermore arranged according to the invention.
  • This plastically deformable disk 30 made of anti-corrosion material may also have a plurality of through holes for the tension elements 14. However, this is not necessarily required. Rather, the plastically deformable disc 30 may also be formed as a solid disc, so that the tension elements 14 during assembly by the plastically deformable Materia! must be inserted through the disc 30, whereby they are already wetted at this time on its surface with anti-corrosion material.
  • the material of the sealing washer 28 seals around the tension members 14 before the disc 30 is corrosion-plastically deformed to a significant extent. This can be achieved, for example, by matching the modulus of elasticity of the sealing disk 28 and the resistance of the plastically deformable disk 30 to each other with respect to plastic deformation with respect to a compression force acting in the longitudinal direction of the tension elements 14 in order to achieve this goal.
  • FIGS. 3 and 4 show a second embodiment of a tension member according to the invention.
  • the embodiment according to FIGS. 3 and 4 differs from the embodiment according to FIGS. 1 and 2 mainly in that it is not a tendon 10, as it is used in particular for prestressed concrete structures, but a stay cable, as in particular in cable-stayed structures, For example, cable-stayed bridges, extra-stretch bridges or arch bridges, is used. Therefore, in the figures 3 and 4 analogous parts are provided with the same reference numerals as in Figures 1 and 2, but increasingly to the number 100.
  • the tension member or the cable 120 will be described below only to the extent that it differs from the tendon 10 of Figures 1 and 2, the description of which expressly hereby expressly be referenced.
  • the tension member or cable 120 comprises a plurality of individual tension members 114, each of which may be formed, for example, as so-called monoliths. Under a monolayer is understood to be a single strand formed from seven wires, which is surrounded by a sheath made of plastic, preferably polyethylene, wherein the space between the wires and the sheath with corrosion protection material, such as corrosion protection grease is filled.
  • a monolayer is understood to be a single strand formed from seven wires, which is surrounded by a sheath made of plastic, preferably polyethylene, wherein the space between the wires and the sheath with corrosion protection material, such as corrosion protection grease is filled.
  • the tension members 114 are connected to an armature plate 116 made of steel, for example, in traction-transmitting connection.
  • the armature disk 116 as the armature disk 16 of the embodiment according to Figures 1 and 2 is provided with a plurality of through holes 118. Tapered portions 118b of the through-holes 118, which adjoin cylindrical portions 118a, serve to receive annular wedges 120 which engage around the tension members 114 in a positive and non-positive manner.
  • the sheath of the tension members 114 is removed. This can be seen in FIGS.
  • the armature disk 116 and the ring nut 142 together form an anchor device 144, which is supported on the outer surface 112a of the structure 112 via a bearing plate 122. More specifically, the anchor device 144 is supported on the bearing plate 122 via the ring nut 142.
  • the bearing plate 122 may be made of steel, for example. Furthermore, it can be inserted into a recess provided for the structure 112 or be embedded in the structure 112. In principle, however, the anchoring device 144 can also be supported directly on the building 112.
  • the tube 124 may be, for example, a smooth or a profiled plastic tube, in particular polyethylene tube, a smooth or a profiled metal tube, in particular steel tube, or the like.
  • the anchor plate 116 is connected within the concrete of the structure 112 with another tube 146.
  • the further tube 146 may for example be screwed onto the armature disk 116 or welded thereto.
  • a spacer washer 126 is accommodated, which deflects the slightly inclined in the interior of the concrete of the structure 112 relative to the traction axis A of the tension member 110 tension members 114 such that they pass through the armature disk 116 to the traction axis A substantially parallel.
  • the spacer disc 126 is provided with a plurality of correspondingly formed through holes 126a.
  • the spacer disc 126 can be made of plastic, in particular polyethylene, for example.
  • the sealing discs 128 may be made of, for example, a soft rubber, for example nitrile butadiene or chloroprene rubber. In principle, however, it is also conceivable to use fewer or more than three sealing washers.
  • the sealing disk 128 furthest from the armature disk 116 is supported on the spacer disk 126.
  • the spacer disk 126 in turn is supported on a, preferably made of metal, support disk 48.
  • the support disk 148 is in turn held on the armature disk 116 via a plurality of threaded rods 152 equipped with threaded nuts 150, 151.
  • a plastically deformable disk 130 made of anticorrosion material is furthermore arranged.
  • This plastically deformable disc 130 of anticorrosion material may also have a plurality of through holes for the tension elements 114.
  • the plastically deformable disc 130 may also be formed as a solid disc, so that the tension members 114 must be inserted through the plastically deformable material of the disc 130 during assembly, whereby they are wetted on their surface with corrosion protection material.
  • FIGS. 1 and 2 Another difference between the embodiments of FIGS. 1 and 2, on the one hand, and FIGS. 3 and 4, on the other hand, is that with the tension member or stay cable 110, the process of tensioning the tensioner 114 front operation of the activation of the sealing discs 128 and the plastic deformation of the disc 130 of anti-corrosion material! is separated, while both processes proceed according to the above description of the tension or tendon 10 of Figures 1 and 2 there simultaneously.
  • the sealing washers 128 can be activated and the disc 130 of corrosion protection material can be plastically deformed by tightening the threaded nuts 151 of the threaded rods 1 52. Since the disk 130 is clamped between the armature disk 116 and the sealing disks 128, it plastically deforms, so that the corrosion protection material is automatically, i. accompanied by this second clamping operation, is pressed into the tension member 110 in its untensioned state remaining cavities, in particular in the existing between the tension members 114 and the inner walls of the through holes 118 and in the annular keys 120 cavities. Again, one can thus spare the previously required in the prior art subsequent injection of anti-corrosion material after tensioning the tension member.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)

Abstract

L'invention concerne un élément de traction (10) protégé contre la corrosion, comprenant une pluralité d'éléments de traction (14) et un dispositif d'ancrage (44) muni d'un élément d'ancrage (16) qui est conçu pour transmettre les forces de traction des éléments de traction (14) à une structure supérieure (12), au moins un disque d'étanchéité (28) comprimable élastiquement, et un dispositif d'appui (26) qui est agencé sur le côté du ou des disques d'étanchéité (28) opposé à l'élément d'ancrage (16). Selon l'invention, lorsque l'élément de traction (10) est prémonté mais n'est pas encore soumis à une contrainte de traction, au moins un disque déformable plastiquement (30) constitué d'un matériau anticorrosion est agencé entre l'élément d'ancrage (16) et le ou les disques d'étanchéité (28).
EP14744855.9A 2013-08-01 2014-07-30 Élément de traction protégé contre la corrosion et disque déformable plastiquement constitué d'un matériau anticorrosion pour un élément de traction de ce type Active EP3027821B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013215136.5A DE102013215136A1 (de) 2013-08-01 2013-08-01 Korrosionsgeschütztes Zugglied und plastisch verformbare Scheibe aus Korrosionsschutzmaterial für ein derartiges Zugglied
PCT/EP2014/066375 WO2015014892A1 (fr) 2013-08-01 2014-07-30 Élément de traction protégé contre la corrosion et disque déformable plastiquement constitué d'un matériau anticorrosion pour un élément de traction de ce type

Publications (2)

Publication Number Publication Date
EP3027821A1 true EP3027821A1 (fr) 2016-06-08
EP3027821B1 EP3027821B1 (fr) 2017-07-26

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP14744855.9A Active EP3027821B1 (fr) 2013-08-01 2014-07-30 Élément de traction protégé contre la corrosion et disque déformable plastiquement constitué d'un matériau anticorrosion pour un élément de traction de ce type

Country Status (5)

Country Link
US (2) US20160168855A1 (fr)
EP (1) EP3027821B1 (fr)
DE (1) DE102013215136A1 (fr)
ES (1) ES2644914T3 (fr)
WO (1) WO2015014892A1 (fr)

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CN110005251A (zh) * 2019-03-22 2019-07-12 知亦达知识产权(深圳)有限公司 一种可控张拉力大小的预应力顶拉装置
CN110080110B (zh) * 2019-04-17 2020-08-21 中交二航局第四工程有限公司 一种超长杆件多点空间定位方法
CN110219231B (zh) * 2019-07-05 2021-04-09 中国十七冶集团有限公司 一种防止拱桥腐蚀的施工方法
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US10889988B2 (en) 2021-01-12
EP3027821B1 (fr) 2017-07-26
WO2015014892A1 (fr) 2015-02-05
DE102013215136A1 (de) 2015-02-05
US20160168855A1 (en) 2016-06-16
US20190194946A1 (en) 2019-06-27
ES2644914T3 (es) 2017-12-01

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