EP2594700A1 - Kabel für Bauwerke und Verankerungsverfahren für solches Kabel - Google Patents

Kabel für Bauwerke und Verankerungsverfahren für solches Kabel Download PDF

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Publication number
EP2594700A1
EP2594700A1 EP12193091.1A EP12193091A EP2594700A1 EP 2594700 A1 EP2594700 A1 EP 2594700A1 EP 12193091 A EP12193091 A EP 12193091A EP 2594700 A1 EP2594700 A1 EP 2594700A1
Authority
EP
European Patent Office
Prior art keywords
cavity
reinforcements
opening
longitudinal direction
cable
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
EP12193091.1A
Other languages
English (en)
French (fr)
Other versions
EP2594700B1 (de
Inventor
Ivica Zivanovic
Ronan Solet
François Voyat
Philippe Salmon
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
Publication of EP2594700A1 publication Critical patent/EP2594700A1/de
Application granted granted Critical
Publication of EP2594700B1 publication Critical patent/EP2594700B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • E04C5/125—Anchoring devices the tensile members are profiled to ensure the anchorage, e.g. when provided with screw-thread, bulges, corrugations
    • 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
    • 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
    • E02D5/58—Prestressed concrete piles
    • 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

Definitions

  • the present invention relates to the structural cables used in the construction, and more particularly the methods used to anchor them on a construction work.
  • the topology of the structure to be equipped with the structural cable, or other constraints specific to the design or construction site, may prevent access to the rear side of the anchorage.
  • Floating anchors are particularly used in the case of tie rods used to reinforce a solid mass. It then only accesses a front face of the massif in which is penetrated a reinforcing cable. Another application case is that of the prestressing of a concrete wall molded in place without access to the lower face of the raft or support receiving the wall.
  • French Patent No. 693,873 discloses an embedded anchoring system for a parallel-wire cable, comprising a cavity in which the ends of the wires of the cable are engaged by mutually separating these wires, and then cement is injected to seal the whole.
  • Each individual wire subjected to tensile stresses is maintained in the cavity essentially by longitudinal adhesion, which may be insufficient.
  • longitudinal adhesion which may be insufficient.
  • each armature of the cable must be provided with a special shaped end piece, adapted so that the armature can be pushed to the bottom of the cavity despite the presence of other reinforcement already introduced.
  • the frames are introduced one by one so that they come to find their places at the bottom of the cavity. The implementation of such an anchoring process is long and delicate.
  • the frames can be engaged together or in groups, which allows to go quickly enough while controlling the distribution of the reinforcements with their enlarged parts inside the cavity.
  • the distribution in several layers advantageously limits the transverse bulk of the bundle of reinforcement when it is introduced through the conduit to the cavity.
  • the structural cable further comprises at least one spacer member protruding into a bottom of the cavity located opposite the opening in the longitudinal direction, so that the reinforcements bloom at the inside the cavity.
  • the spacer member separates the ends reinforcements at the bottom of the cavity, which ensures their development and allows a firm anchoring of the cable with the mass of the sealing material injected into the cavity.
  • the spacer member is for example of generally conical and / or spherical shape. It can be mounted on a rod fixed to the bottom of the cavity or directly on the bottom wall.
  • the enlarged portions of the ends of the armatures may have a shoulder forming a stop in the direction of the opening of the cavity. This shoulder allows the hardened sealing material to oppose a high reaction force to the reinforcement subjected to tensile forces.
  • Another aspect of the present invention relates to a construction structure, comprising at least one structural cable as defined above.
  • the reinforcement is introduced into the duct (and the cavity) in at least one group of several reinforcements, the reinforcements of each group being introduced together into the cavity.
  • the armatures are all introduced in a single group in the cavity.
  • the figure 1 illustrates an example of reinforcement for implementing the invention.
  • the armature 1 consists in this example of a strand formed of seven metal wires, one end 2 of which is provided with an enlarged part 3.
  • reinforcements of this type may be assembled parallel to each other to form a beam 4 which, once anchored on a construction work, will constitute a structural cable.
  • the enlarged portion 3 may be made by mechanical treatment directly on the end 2 of the frame if the material and the constitution of this frame allow. It may also consist of an end piece firmly fixed to the end of the frame 1, for example by hot or cold crimping, welding, bonding, bolting, etc.
  • the end piece 3 is in the general shape of a cylindrical sleeve, with a shoulder 3 'forming a stop towards the active part of the structural cable, that is to say the part or the armatures work in tension (towards the front side of the anchor), and another shoulder 3 "on the opposite side
  • the stops formed by these shoulders 3 ', 3" are surfaces substantially perpendicular to the longitudinal direction X of the reinforcements 1.
  • the enlarged portions 3 of the reinforcements 1 can be distributed in several layers offset along the longitudinal direction X. In the example shown in FIG. figure 2 they are divided into three layers. This layer distribution minimizing the total cross section of the reinforcement bundle 4 is facilitated by the cylindrical shape of the sleeves forming the enlarged parts 3.
  • the figure 3 shows an example of part 6 used to form an anchoring cavity 8 in a concrete structure. It may consist of a tromplaque (a diffusion part of the force), of the same kind as those commonly used in pretensioning cable anchors, whose internal volume of generally frustoconical shape around an axis of symmetry Y defines the anchoring cavity 8.
  • This cavity 8 has an opening 9 on its side of smaller section on which is connected the prestressing duct (sheath or tube). On the opposite side, of widest section, it is closed by a bottom plate 10 fixed to the surface of the part 6.
  • This piece 6 may have radial or helical ribs 11 which will improve its retention in the surrounding concrete and the transfer of forces between the cable and the structure.
  • the wall or the bottom 10 of the part 6 may furthermore have one or more injection conduits 12 which may serve to fill the cavity 8 with a sealant, for example a grout of cement, mortar or resin.
  • the figure 4 shows piece 6 after its installation in the concrete structure.
  • the concrete has been poured completely (around the duct, the part 6 and behind the bottom plate 10), so that the anchoring cavity 8 is not accessible except from the opposite end through the conduit (as for a conventional prestressing cable) and up to the opening 9 formed on its smaller section side.
  • the sheath or preloading duct 5 is connected to the opening 9 of the cavity 8.
  • This sheath 5 will contain the bundle of reinforcements 4 of the prestressing cable (see FIG. Figures 5 and 6 ).
  • the part 6 can be embedded in the raft of a concrete structure, while the prestressing sheath 5 is embedded in the concrete wall that stands above the raft.
  • the prestressing sheath 5 and the part 6 are mounted with their longitudinal axis Y parallel to a vertical direction.
  • care is taken to set up an injection tube 13 which is connected to the injection conduit 12 provided in the part 6, leaving the tube 13 accessible from the outside once the concrete sank.
  • the injection tube 13 is disposed inside the duct at the same time as the introduction of the reinforcements. In this case, the conduit 12 on the part is previously plugged.
  • the raft is concreted first, the opening 9 of the anchoring cavity remaining accessible on the upper face of this raft.
  • the bundle of reinforcements 4 is brought, surrounded by the sheath The lower part of the bundle of reinforcements 4 is engaged in the cavity 8 through the opening 9, then the sheath 5 is connected to the opening 9.
  • the sheath 5 is positioned in the mold where the concreting of the wall to be prestressed is carried out.
  • the sealant is limited in height as illustrated on the figure 6 , for example up to the opening 9, to allow to have the free length for the subsequent tensioning of the structural cable.
  • the free length is then injected with a filler and protection against corrosion.
  • the sealant may cover the entire length of the cable as the reinforcement is stripped and cleaned on the seal-limited part to allow adhesion during subsequent tensioning of the structural cable as in the general case.
  • the structural cable can be tensioned in a conventional manner, by pulling it at its end opposite to that anchored in the cavity 8.
  • the tensile force on a reinforcement 1 at the level of the anchoring is transmitted to the cured sealant mass through the shoulder 3 'of its enlarged portion 3, which forms a stop in the direction of the opening 9 of the cavity.
  • the tensile force of the cable is diffused to the structural concrete via the part 6.
  • the shape of the internal anchoring cavity 8 has at least a portion of larger section than the opening 9 transversely to a longitudinal direction Y.
  • One possibility for doing so is to use the variant embodiment illustrated by the Figures 7 to 10 .
  • the part 6 defining the anchoring cavity 8 is modified to include a spacer member 16 projecting into said cavity.
  • a spacer member 16 at the bottom of the cavity 8 mounted on the Y axis. This member 16 positioned in the cavity 8 is fixed in the center of the bottom plate 10 closing the cavity 8 opposite its opening 9.
  • beam 4 is composed of individually wrapped strands and sliding 17.
  • the armatures 1 of the beam 4 are illustrated in number of three.
  • the spacer member 16 has an upper portion 14 directed towards the opening 9 of the anchoring cavity 8.
  • This upper portion 14 may have a spherical and / or conical shape to facilitate the spacing of the reinforcements of the beam.
  • the spacer member 16 may be in one spherical or conical piece, or mounted on top of a rod fixed in the center of the bottom of the anchoring cavity, as illustrated in FIGS. Figures 7-10 . It can also be positioned higher towards the opening 9.
  • the cavity 8 and the pipe 5 can be filled with the sealant at one time. This filling is done according to the arrow F as illustrated in the figure 9 , via the injection tube or tubes 13 disposed inside the conduit 5 at the same time as the introduction of the reinforcements.
  • the sealant covers the entire bundle (from the bottom of the workpiece 6 to the upper end of the sliding sheathed strands). After curing, the structure cable can be tensioned as previously described.
  • a drilled anchor of relatively short length is finally and effectively obtained, and the whole of the cable is also introduced into the anchoring cavity 8 in one go.
  • a collective introduction of the reinforcements is kept inside the anchoring cavity 8, but this introduction is successively carried out in several groups and not only one.
  • each group, or sub-beam, of reinforcements is assembled, by providing the spatial distribution of the enlarged portions 3 at their ends ( figure 2 ), before being introduced into the cavity.
EP12193091.1A 2011-11-18 2012-11-16 Kabel für Bauwerke und Verankerungsverfahren für solches Kabel Active EP2594700B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1160498A FR2982890B1 (fr) 2011-11-18 2011-11-18 Cable de structure et procede d'ancrage d'un cable de structure

Publications (2)

Publication Number Publication Date
EP2594700A1 true EP2594700A1 (de) 2013-05-22
EP2594700B1 EP2594700B1 (de) 2017-02-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP12193091.1A Active EP2594700B1 (de) 2011-11-18 2012-11-16 Kabel für Bauwerke und Verankerungsverfahren für solches Kabel

Country Status (4)

Country Link
EP (1) EP2594700B1 (de)
DK (1) DK2594700T3 (de)
ES (1) ES2623921T3 (de)
FR (1) FR2982890B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114922063A (zh) * 2022-05-20 2022-08-19 兰州理工大学 一种悬索桥隧道式锚碇

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2946736A1 (en) * 2014-04-22 2015-10-29 Richard V. Campbell Advanced stranded cable termination methods and designs

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR693873A (fr) 1929-04-24 1930-11-26 Perfectionnements apportés aux ouvrages de travaux publics, notamment à ceux, tels que barrages, comportant des massifs en matériaux de construction
DE1609722B1 (de) * 1966-12-07 1971-06-24 Leonhardt Fritz Prof Dr Ing Vergussmasse fuer die Verankerung von Zuggliedern und Verfahren zum Einbringen
DE3002024A1 (de) * 1980-01-21 1981-07-23 Siempelkamp Gießerei GmbH & Co, 4150 Krefeld Anordnung fuer die verankerung von vorspannzuggliedern
US4484425A (en) * 1982-07-21 1984-11-27 Figg And Muller Engineers, Inc. Anchorage of cables
US5289626A (en) * 1989-03-27 1994-03-01 Kajima Corporation Foundation anchor and method for securing same to a foundation
EP0935034A1 (de) 1998-02-09 1999-08-11 VSL International AG Verfahren zur Herstellung einer Verankerung, Verankerungsteil und Spannelement zu diesem Zweck

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR693873A (fr) 1929-04-24 1930-11-26 Perfectionnements apportés aux ouvrages de travaux publics, notamment à ceux, tels que barrages, comportant des massifs en matériaux de construction
DE1609722B1 (de) * 1966-12-07 1971-06-24 Leonhardt Fritz Prof Dr Ing Vergussmasse fuer die Verankerung von Zuggliedern und Verfahren zum Einbringen
DE3002024A1 (de) * 1980-01-21 1981-07-23 Siempelkamp Gießerei GmbH & Co, 4150 Krefeld Anordnung fuer die verankerung von vorspannzuggliedern
US4484425A (en) * 1982-07-21 1984-11-27 Figg And Muller Engineers, Inc. Anchorage of cables
US5289626A (en) * 1989-03-27 1994-03-01 Kajima Corporation Foundation anchor and method for securing same to a foundation
EP0935034A1 (de) 1998-02-09 1999-08-11 VSL International AG Verfahren zur Herstellung einer Verankerung, Verankerungsteil und Spannelement zu diesem Zweck

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114922063A (zh) * 2022-05-20 2022-08-19 兰州理工大学 一种悬索桥隧道式锚碇

Also Published As

Publication number Publication date
EP2594700B1 (de) 2017-02-01
FR2982890A1 (fr) 2013-05-24
ES2623921T3 (es) 2017-07-12
FR2982890B1 (fr) 2014-01-03
DK2594700T3 (en) 2017-05-22

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