EP2505714B1 - Procédé de vidange d'un système d'ancrage d'un câble de structure à un élément de construction. - Google Patents

Procédé de vidange d'un système d'ancrage d'un câble de structure à un élément de construction. Download PDF

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Publication number
EP2505714B1
EP2505714B1 EP12160466.4A EP12160466A EP2505714B1 EP 2505714 B1 EP2505714 B1 EP 2505714B1 EP 12160466 A EP12160466 A EP 12160466A EP 2505714 B1 EP2505714 B1 EP 2505714B1
Authority
EP
European Patent Office
Prior art keywords
filling material
chamber
heating element
heating
opening
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.)
Active
Application number
EP12160466.4A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2505714A1 (fr
Inventor
Aurélien Sylvestre
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.)
Soletanche Freyssinet SA
Original Assignee
Soletanche Freyssinet SA
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 Soletanche Freyssinet SA filed Critical Soletanche Freyssinet SA
Priority to PL12160466T priority Critical patent/PL2505714T3/pl
Publication of EP2505714A1 publication Critical patent/EP2505714A1/fr
Application granted granted Critical
Publication of EP2505714B1 publication Critical patent/EP2505714B1/fr
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Anticipated expiration legal-status Critical

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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
    • E01D19/00—Structural or constructional details of bridges
    • E01D19/14—Towers; Anchors ; Connection of cables to bridge parts; Saddle supports
    • 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
    • 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
    • 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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/12—Mounting of reinforcing inserts; Prestressing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/0318—Processes
    • Y10T137/0391—Affecting flow by the addition of material or energy

Definitions

  • the present invention relates to a method of emptying an anchoring system of a structural cable to a construction element.
  • the structural cable in question may be in particular a guy, a hanger or a prestressing cable.
  • the structural cables usually encountered comprise a plurality of strands which each comprise metal wires themselves wrapped together in a protective sheath.
  • Each of these protective sheaths is interrupted at an end wafer so that the strands each have a stripped end section.
  • the filler is usually a petroleum wax, or a fat. It is injected hot into the anchoring chamber or chambers after the cable is put in place and anchored. It forms after cooling a solid or a thick paste that adheres to the stripped cable and provides the desired seal.
  • the filler may be removed with a trowel and / or a current hot air.
  • the present invention aims to remedy all or some of the disadvantages mentioned above, that is to say in particular to provide a method for draining an anchoring system of a structural cable having a filled chamber filling material difficult to access.
  • the filler although solid at room temperature, is quite soft and it is possible to enter a heating element. It usually occupies the entire first chamber, so as to wrap the bare part of the cable.
  • the filling material may have a protective role of the cables that it surrounds.
  • At least one heating element is passed through an opening in the envelope delimiting the first chamber. He can be It is advantageous to use several heating elements passing through several openings, or by the same opening, so as to accelerate the heating.
  • the opening or openings may be pre-existing, for example, it may be holes in the anchor block and used to fill the chamber. Alternatively, the openings can be made especially for the emptying operation.
  • fluidify is meant to "make fluid enough to flow through an opening of the type used to introduce the heating element.
  • a wax it is liquefaction.
  • a fat it is a matter of lowering the viscosity sufficiently.
  • the heating element may be of any kind appropriate to the filling material that it is a question of fluidizing, without it catching fire. If the structure cable is partly sheathed in the chamber, care must be taken not to damage this sheath, which generally melts at around 180 ° C.
  • the purpose of the heating is normally to fluidify all the filler, or at least a large part. At a minimum, the filler is fluidized in an area where it contacts the stripped wire.
  • the heat is communicated from the heating element to the filling material being fluidized.
  • the hot filling material moves by convection and helps to melt the remaining material.
  • the extraction of the fluidized filling material is done by opening the envelope of the first chamber. This opening may be the same as that used for the introduction of the heating element (s). Several openings can be used for extraction, so that all the liquid can be removed more easily.
  • the method is relatively simple to implement. It makes it possible to empty the filling material in a non-intrusive manner, without any notable alteration of the structure of the anchor. It remains functional and can be refilled with filling material.
  • the considered structural cable is for example the lower part of a bridge stay oriented in a direction X.
  • the cable is composed of a plurality of strands. Three of them have been represented: 2a, 2b, 2c.
  • the structural cable (that is to say its strands 2a, 2b, 2c) is anchored by means of an anchoring system 1 in axial support on a construction element 7 (for example a span of the bridge).
  • the anchoring system has for example a length of about 600 to 1000 mm in the X direction and a diameter of about 200 to 600 mm in a plane orthogonal to this direction.
  • Each strand is itself formed of a plurality of elementary wires. These son may be parallel or twisted and are for example made of galvanized steel or galfanized.
  • the strands 2a, 2b, 2c are each surrounded by a protective sheath which is able to protect them during their lifetime against corrosion due to weather or other external aggression, including moisture and handling.
  • This sheath is for example made of a plastic material, such as high density polyethylene (HDPE) or a polyamide.
  • the structural cable is anchored to a perforated block 4, or anchor block, for example by clamping the ends of the strands in split jaws (not shown).
  • each of the protective sheaths of the strands is interrupted at an end wafer so that the cable has a first denuded portion 2aa, 2bb, 2cc.
  • the strands emerge from the anchoring block 4 and form a second portion 2aaa, 2bbb, 2ccc of the structure cable, also stripped.
  • this second part of the structural cable is contained in a second chamber 3a filled with a filling material which, in the example under consideration, is a wax.
  • the chamber 3a is delimited on the one hand by the anchoring block 4 and on the other by a cover 9 pierced with two openings 9a and 9b closed by plugs.
  • the anchoring block 4 comprises two openings 4a and 4b, for example circular holes, for filling the first chamber 3 with hot wax.
  • the chamber 3 is located in an area of the anchoring system 1 which is generally surrounded by the construction element. Because of this, it is not very accessible.
  • the figure 1b represents the same anchoring system, during the implementation of a method of emptying according to the invention.
  • the filling material present in the chamber 3a can be drained by removing the cover 9 to access it directly. This can be removed manually, if necessary by blowing hot air. In this case, it ensures the sealing of the openings 4a and 4b, and possibly that openings corresponding to the passage of the strands 2a, 2b, 2c in the block 4.
  • two heating elements 10a and 10b are inserted into the filling material which fills the first chamber 3. These were inserted via the openings 9a and 9b.
  • the heaters 10a and 10b have a seal (not shown) so that, when in place, the openings 9a and 9b are sealed against flow of the fluidized filler into the first chamber 3.
  • the heating elements 10a and 10b comprise a cylindrical portion with an end 10e through which they are embedded in the solid filler.
  • heating elements 10a and 10b are then passed through the openings 4a and 4b of the anchor block 4. These are aligned with the openings 9a and 9b of the hood block 9 .
  • a heating step of the filling material contained in the first chamber 3 begins. This material is brought to a temperature greater than its melting temperature, but less than about 300 ° C., in order not to cause its heating. ignition and even less than about 160 ° C to not damage the sheaths of the strands 2a, 2b, 2c.
  • the heating elements 10a and 10b may comprise a thermocouple 10d located to measure the temperature at the end 10e of the heating elements. The thermal power dissipated by the heating elements is then regulated as a function of the temperature measured by these thermocouples.
  • Other thermocouples may be inserted into the first or second chamber to better control the fluidization of the filler, or to replace the thermocouples 10d.
  • the heating elements 10a and 10b are removed and the fluidized filler may flow into the passages created by the insertion of the heating elements.
  • the fluidized filling material can be sucked by a cannula inserted either by the same path as the heating elements 10a and 10b, either by an ad hoc opening of the envelope of the first chamber 3.
  • the filling material contained in the second chamber can be easily removed by removing the cover 9.
  • This material can also be heated without removing the cover.
  • the heating can be done using a heating belt 12 placed on the outer face of the cover 9.
  • the heating elements 10a and 10b can also be configured to be able to heat the filling material contained in the second chamber 3a.
  • the figure 3 illustrates an embodiment of the heating element 10a.
  • Element 10b is identical to element 10a.
  • the heating element 10a has an envelope whose outer surface is cylindrical with a circular base. The section is a little less than 10 mm.
  • the element 10a has two opposite ends 10e and 10f, one of which, 10e, is intended to penetrate into the solid filler of the chambers 3a and 3. It comprises an electrical resistance 10c arranged along the entire length of the envelope, and a thermocouple 10d placed so as to measure the temperature of the end 10e. Supply wires of the resistor 10c and the thermocouple 10d exit through the end 10f.
  • each resistor 10c is connected to a current source 11 comprising a PID regulator controlling the electrical intensity delivered to the resistor 10c (that is, controlling the thermal power dissipated by the Joule effect). temperature function measured by the thermocouple 10d. If there are several resistors, each is independently powered and controlled. The control reduces the heating time under maximum temperature stress.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Bridges Or Land Bridges (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
EP12160466.4A 2011-03-28 2012-03-21 Procédé de vidange d'un système d'ancrage d'un câble de structure à un élément de construction. Active EP2505714B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL12160466T PL2505714T3 (pl) 2011-03-28 2012-03-21 Sposób opróżniania systemu kotwiącego linę konstrukcyjną do elementu konstrukcji

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1152557A FR2973400B1 (fr) 2011-03-28 2011-03-28 Procede de vidange d'un systeme d'ancrage d'un cable de structure a un element de construction.

Publications (2)

Publication Number Publication Date
EP2505714A1 EP2505714A1 (fr) 2012-10-03
EP2505714B1 true EP2505714B1 (fr) 2015-07-01

Family

ID=45819144

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12160466.4A Active EP2505714B1 (fr) 2011-03-28 2012-03-21 Procédé de vidange d'un système d'ancrage d'un câble de structure à un élément de construction.

Country Status (11)

Country Link
US (1) US8834639B2 (zh)
EP (1) EP2505714B1 (zh)
KR (1) KR101919054B1 (zh)
AU (1) AU2012201791B2 (zh)
DK (1) DK2505714T3 (zh)
ES (1) ES2547806T3 (zh)
FR (1) FR2973400B1 (zh)
HK (1) HK1170276A1 (zh)
MX (1) MX2012003777A (zh)
PL (1) PL2505714T3 (zh)
PT (1) PT2505714E (zh)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105088947B (zh) * 2014-05-13 2017-10-03 柳州欧维姆机械股份有限公司 一种填充或涂覆有聚脲防护材料的钢丝拉索的制作方法
CN105088950B (zh) * 2014-05-13 2017-10-03 柳州欧维姆机械股份有限公司 一种外层有聚脲防护材料的钢绞线拉索及其制作方法
CN108301324B (zh) * 2018-01-25 2020-07-07 中铁大桥科学研究院有限公司 一种斜拉桥拉索智能除湿除冰系统及方法
CN108316146A (zh) * 2018-03-06 2018-07-24 无锡法尔胜悦能动力有限公司 一种桥梁道路用缆索及其加热控制装置
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

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB608593A (en) * 1943-09-30 1948-09-17 Grands Travaux De Marseille Sa Reinforcement for prestressing and reinforcing concrete constructions
DE3038898C2 (de) * 1980-10-15 1985-10-10 Dyckerhoff & Widmann AG, 8000 München Verfahren zum Erzeugen eines Korrosionsschutzes bei Litzen aus hochfesten Stahldrähten
GB8327978D0 (en) * 1983-10-19 1983-11-23 Manuf Aceros Caucho Sa Cable anchorage
US5173982A (en) * 1991-07-25 1992-12-29 Greiner Inc, Southern Corrosion protection system
FR2798410B1 (fr) 1999-09-15 2001-11-23 Freyssinet Int Stup Dispositif d'ancrage pour fixer un cable de structure a un element de construction
KR100867414B1 (ko) 2008-03-12 2008-11-06 주식회사 한국종합기술 인장력이 도입된 프리캐스트 콘크리트 옹벽

Also Published As

Publication number Publication date
ES2547806T3 (es) 2015-10-08
KR20120110054A (ko) 2012-10-09
FR2973400B1 (fr) 2013-04-26
HK1170276A1 (zh) 2013-02-22
US8834639B2 (en) 2014-09-16
AU2012201791B2 (en) 2017-01-12
AU2012201791A1 (en) 2012-10-18
DK2505714T3 (en) 2015-10-05
PT2505714E (pt) 2015-10-13
EP2505714A1 (fr) 2012-10-03
FR2973400A1 (fr) 2012-10-05
KR101919054B1 (ko) 2018-11-15
US20120247568A1 (en) 2012-10-04
MX2012003777A (es) 2012-09-27
PL2505714T3 (pl) 2016-02-29

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