EP3317471B1 - Verankerungsanordnung für eine struktur, betonstruktur mit solch einer anordnung und herstellungsverfahren solch einer betonstruktur - Google Patents

Verankerungsanordnung für eine struktur, betonstruktur mit solch einer anordnung und herstellungsverfahren solch einer betonstruktur Download PDF

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EP3317471B1
EP3317471B1 EP16738224.1A EP16738224A EP3317471B1 EP 3317471 B1 EP3317471 B1 EP 3317471B1 EP 16738224 A EP16738224 A EP 16738224A EP 3317471 B1 EP3317471 B1 EP 3317471B1
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EP
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Prior art keywords
tubular member
strands
tendon
anchor head
concrete
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EP16738224.1A
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English (en)
French (fr)
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EP3317471A1 (de
Inventor
Ka Wai Alice LIN
Yau Chun YIP
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VSL International Ltd
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VSL International Ltd
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    • 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
    • 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
    • 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 concerns an anchorage assembly for a concrete structure, a concrete structure with such an assembly, and a manufacturing method of such a concrete structure.
  • tendons In concrete structure with pre-stressed strands, there exists several types of tendons, divided into bonded or unbonded tendons. Generally the tendons are made of individual steel elements that are placed in the structure at a first stage and stressed to a certain force at a later stage.
  • one or more strands are inserted into a metal or plastic channel that is embedded in the concrete.
  • the strand(s) is(are) stressed with a mono or multi-strand jack and anchored in a common anchorage device.
  • the channel is then filled with a cementitious grout that provides corrosion protection to the strand(s) and bonds the tendon to the concrete surrounding the channel.
  • Bonded systems are more commonly used in bridges for the roadway, the piles, the foundation and in building. In buildings, they are typically used in heavily loaded beams such as transfer girders and landscaped plaza decks.
  • An unbonded tendon is one in which the prestressing steel is not actually bonded to the concrete that surrounds it except at the anchorages.
  • the two most common unbonded systems are first monostrand tendons and secondly bare strands surrounded by grease.
  • the monostrands are used in slabs and beams for buildings, parking structures and-on-ground, in bridge for external post-tensioning and in several type of a suspended structure with cable stay.
  • a monostrand consists of several steel wires that are coated with a corrosion-inhibiting soft product and encased in an extruded plastic protective sheathing made of plastic material.
  • the tendon can be made of one monostrand (for slab) up to several monostrands (external post-tensioning ,cable stays), In some case the monostrand(s) is (are) directly embedded in the concrete; in another case they may be installed in a channel.
  • the second type of unbonded tendon consists in one to several bare strands that are installed in a channel made of steel or plastic, the channel being embedded in a concrete structure or following a specific layout within a structure.
  • the void is filled with a corrosion-inhibiting soft product allowing the strand to move with respect to the channel and to the structure.
  • the bare strands consist of several steel wires assembled together.
  • the soft products are made of grease or wax.
  • the anchorage consists of an iron casting and a conical, two-piece or three-piece wedge which grips individually from 1 to 6 or 7 strands.
  • an anchor block with two-piece or three-piece wedges, which grips as many strands as necessary.
  • Such anchor block bears on a cast iron piece or steel manufactured part that is embedded in a structure.
  • the channel is generally made of plastic or steel tubes when located outside a structure between several deviation point, and the channel is generally made of corrugated ducts in steel or plastic when embedded in a structure.
  • EP0566463 presents such an unbonded system with monostrands, in a modified embodiment where the strands of the tendon are embedded directly in the concrete block forming the concrete structure or in a channel filled with a hardening filler such as cement grout before the strands are stressed.
  • the advantage of such unbonded system is that the steel wires inside the monostrand are protected from any corrosion by the soft filler contained in the plastic sheath. Also the sheath allows to carry out the installation of the strands much in advance during the construction period, reducing therefore the total time of construction with a high level of protection.
  • EP1227200 and KR100966457 concerns anchorage assemblies where a first part of individual strands of a tendon pass through individual perforation of an anchor head, a second part of the tendon is placed in a tubular member with the tendon passing in an opening formed in a bearing plate adjacent to the anchor head, and a removable locking system allows to fix the strands in the anchorage.
  • the present invention also aims to provide an alternative solution to the known solution which facilitates inspection and re-stressing of the tendons.
  • an anchorage assembly for a structure comprising a tendon made of strands, the anchorage assembly defining at least two parts:
  • the de-tensioning of the tendon can be implemented while the anchor head has entered within the first tubular member, after removal of the locking system.
  • Fig.1 a situation where the tendon 10 is mounted through an anchorage assembly 20 placed partially within a structure 42, and comprising in a linear arrangement a channel 43, a second tubular member 22, a first tubular member 24 and a bearing plate 26.
  • the second tubular member 22 is placed within the structure 42 at a distance from the front face 40 of the structure, in a direction orthogonal to the front face 40.
  • the inner diameter of the second tubular member 22 allows the introduction of the tendon 10.
  • the inner diameter of the second tubular member 22 is D1.
  • outlet means the extremity of any elongated element turned towards the outside of the front face 40 of the structure 42 or the structure 42 (on the left on the figures 1 to 6 ).
  • inlet means the extremity of any elongated element turned opposite to the front face 40 or (on the right on the figures 1 to 6 ).
  • the first tubular member 24 extends the second tubular member 22 in a coaxial manner to the first tubular member 22, in the direction of the orthogonal to the front face 40.
  • a first tubular member 24 is usually formed by a trumpet shape elongated member, named as a "trumpet".
  • the inlet of the first tubular member 24 is connected in a water-sealed manner to the outlet of the second tubular member 22.
  • the inner diameter of the first tubular member 24 also allows the introduction of the tendon 10. Generally the inner diameter of the first tubular member 24 is larger than the inner diameter of the second tubular member 22.
  • At least the inner diameter D2 of the first tubular member 24 at the inlet side is larger than the inner diameter of the second tubular member 22 D1 at the outlet side, namely D2 > D1.
  • the bearing plate 26 is placed at the front face 40 of the structure 42, with a large opening 27 adjacent to the outlet of the first tubular member 24 (see Fig.1 ), having an inner diameter D4 close to D3.
  • an injection pipe 23 is mounted so as to have fluid communication between the inner space of the second tubular member 22 and the outside of the formwork forming the front face 40 of the structure 42.
  • a temporary sealing block 28 having an outer diameter close to D2 but slightly less, is threaded from outside the anchorage assembly 20, into the bearing plate 26 and the first tubular member 24 up to the inlet of the first tubular member 22 onto an abutment plate 41 with an opening.
  • Such a temporary sealing block 28 forms a thick plate having as much holes as strands 12 and is first placed with the tendon passing through, each strand 12 in a corresponding hole of said temporary sealing block 28, before engagement of the temporary sealing block 28 through the opening 27 of the bearing plate 26.
  • the sealing block 28 is made of a sealing pad locked between a pressing pad and a pressing plate.
  • WO2011116828 presents a possible embodiment for such a sealing block 28.
  • the tendon 10 is composed of one or a plurality of sheathed and greased strands 12 with sheath 14 within the structure 42 up to the outlet face defined by the abutment plate 41.
  • the strand(s) is (are) individually wrapped in a outer (Plastic) sheath 14 with interposition of corrosion preventive compound such as grease or wax, which means the metallic strand can slide with respect to the sheath forming the envelope 14 of each strand 12, the corrosion preventive compound forming also a lubricant.
  • the preferred thickness of the sheaths 14 is between 1 and 2 mm, a value over 1.5 mm is recommended when the tendon length is over 100 m long of the installation condition are difficult with the tendon deviation having high deviation (over 100 °).
  • the invention is not limited to such preferred type of strands 12 and can apply also to other types of strands, such as bare metallic strands (not illustrated) : in such a case, the second tubular member 22 is not to be filed in with cement matrix but with a non-hardening corrosion preventive compound such as wax or grease.
  • the second tubular member 22 is filled with a hardening filler by injection of a hardening matrix through the injection pipe 23 into the second tubular member 22 so as to fill in all the interstices between the outer sheath 14 and the second tubular member 22, and between all pairs of adjacent sheathed strands 12.
  • a hardening matrix By the setting or hardening of the cement matrix 23a, each strand 12 is locked in a direction perpendicular to the front face of the anchorage 40 by its sheath 14 to the second tubular member 22.
  • the temporary sealing block 28 is un-tight and removed.
  • an anchor head 30 and a removable locking system 32 are provided.
  • the anchor head 30 is formed by a thick metallic block having as much holes as strands 12. According to an important feature, the anchor head 30 has an outside diameter D5 smaller than said opening (diameter D4) of the bearing plate 26 (see Fig. 3 ). Also, the outer end of the second tubular member 22 has a diameter D1 smaller than the outer diameter D5 of the anchor head 30. Also, the anchor head 30 has an outside diameter D5 smaller than said inner diameter D3 and D2 of the first tubular member 24 at the outlet side.
  • the removable locking system 32 comprises at least one split shim; in Fig.1 two superposed split shims are used, having both an outer diameter larger than the diameter D4 of the opening of the bearing plate 26.
  • the removable locking system 32 comprises a nut able to cooperate with a threaded portion of the outer face of the anchor head 30, with the outer diameter of the nut larger than the diameter D4 of the opening of the bearing plate 26.
  • the removable locking system 32 allows for the reversible locking of the anchor head 30 outside the first tubular member 24 (for tensioning or re-tensioning the tendon 10) and, by unlocking, letting the anchor head 30 circulating in the first tubular member 24 (for de-tensioning the tendon 10) without removing the conical wedges 34.
  • strands 12 are sheathed along their running part up to and within said second tubular member 22, said sheath 14 being thereby able to be embedded within said filler compound (notably locked within cement matrix 23a) in said second tubular member 22, and the sheaths 14 of the said strands 12 are removed in their intermediate and end portions (unsheathed length 12a) extending within said first tubular member 24 up to their extremity outside the front face 40 (or structure 42).
  • This unsheathing operation is generally carried out just before the third step of stressing described below so that the strands are protected from the corrosion until they are unsheathed and finally stressed.
  • a stressing jack 50 is mounted and activated between the outer face of the anchor head 30 and the extremity of each individual strand 12 ( Fig.3 ).
  • blocking means such as (split) conical wedges 34 are entered into the holes of the anchor head 30, around each strand 12 to fix the stressed state of each strand 12.
  • a cap 36 is mounted in a water-tight manner onto the bearing plate 26, for accommodating said removable locking element 32, said anchor head 30 and said end portion of the tendon 10 (the extremity of the strands 12 of the end portion being unsheathed).
  • Said cap 36 is able to receive a removable protective product, namely a non-hardening corrosion preventive compound 38, such as wax or grease.
  • the anchorage assembly 20 of the present invention defines, as shown on Fig.4 , a first part C, a second part B and a third part A.
  • the third part A of the anchorage assembly 20 the strands 12 are locked by their sheath 14 with respect to the second tubular member 22, by means of the cement matrix 23a, with the possibility for the individual metallic strands to slide with respect to the corresponding sheath 14.
  • the second part B the intermediate unsheathed portion 12a of the strands 12 is protected against corrosion by the corrosion preventive compound 38 contained in the second tubular element 24 .
  • the third part A and the second part B are located within the structure 42.
  • the end portion of the unsheathed strands 12a is placed in the removable locking system 32, the anchor head 30 and in the cap 36.
  • the third part A of the anchorage assembly is omitted, namely the second tubular member 22 and the channel 43 are not present in the anchorage assembly 20.
  • said sealing block 28 and said abutment plate 41 are placed during concreting and said strands 12 are able to be directly embedded in the structure concrete 42 by their sheath 14 while allowing the metallic part of the strand to move longitudinally in the structure.
  • the strands remain locked laterally by the concrete matrix.
  • Said strands could be monostrands.
  • the strands 12 are in the normal service situation, namely after stressing and filling of the second tubular element 24 and of the cap 36 with grease or any other non-hardening corrosion preventive compound 38 which is in contact with the bare segment 12a of the strands 12.
  • this corrosion preventive compound 38 is also present in the opening 27 of the bearing plate 26 around the tendon 10, namely between all pairs of adjacent bare strands 12a, between the periphery of the opening 27 and the periphery of the tendon 10, in the opening of the removable locking system 32 and in the perforations of the anchor head 30 so as to wrap all the unsheathed portions 12a of the strands 12.
  • said first part C further comprises immobilisation pieces placed individually around a length of said unsheathed strands 12a at least partially disposed within the outlet of said perforations of the anchor head 30.
  • said immobilisation pieces are split wedges 34.
  • the pouring and setting of the concrete in the formwork is made initially after the installation of the first and second tubular members 22, 24, the abutment plate 41, the bearing 26 and the injection pipe 23.
  • These elements including the tendon 10 and the compound 23a can therefore be implanted as from the situation shown in fig.2 at any time, namely several weeks, months or years later: with its strands 12 and their sheath 14 the tendon 10 is protected against corrosion all along its length before removing the sheaths 14 and further stressing.
  • the present invention concerns a method of lifting-off of the tendon 10 equipped with the previously described anchorage assembly 20, in a structure 42, and also a method for the surveillance of the tendon in such a structure 42.
  • the structure 42 can be a structure made of concrete or steel or with both materials.
  • such a method of lifting-off a tendon 10 in a structure 42 comprises a lift-off step of at least one tendon 10 with the following sub-steps:
  • a method of surveillance of a tendon 10 in a structure comprising a strand sampling step with the following sub-steps:
  • said strand sampling step comprises further the following sub-steps (not shown):
  • the length of the first tubular element 24 serves as strand length available for de-tensioning the tendon 10.

Claims (16)

  1. Verankerungsbaugruppe (20) für eine Konstruktion (42), umfassend ein Spannkabel (10), das aus Litzen (12) hergestellt ist, wobei die Verankerungsbaugruppe (20) mindestens zwei Teile definiert:
    - einen ersten Teil (C), wobei die Litzen (12) des Endabschnitts des Spannkabels (10) durch einzelne Perforationen eines Ankerkopfs (30) geführt werden,
    - einen zweiten Teil (B), wobei ein Zwischenabschnitt des Spannkabels (10) in einem ersten röhrenförmigen Bauteil (24) positioniert ist, der ein entfernbares Schutzprodukt (38) aufnehmen kann,
    wobei der zweite Teil (B) geeignet ist, in einer Konstruktion (42) positioniert zu werden, wobei die Litzen (12), die den Endabschnitt aufweisen, einerseits durch eine Öffnung (27), die in einer Lagerplatte (26) ausgebildet ist, welche in einer angrenzenden Position zum Ausgang des ersten röhrenförmigen Bauteils (24) angeordnet ist, wobei der Ausgang des ersten röhrenförmigen Bauteils (24) und die Öffnung (27) miteinander verbunden sind, und andererseits durch die einzelnen Perforationen des Ankerkopfs (30), der außerhalb der Vorderseite (40) der Konstruktion (42) positioniert ist, geführt werden,
    wobei der Ankerkopf (30) einen Außendurchmesser (D5) aufweist, der kleiner ist als der Durchmesser (D4) der Öffnung (27) der Lagerplatte (26),
    wobei er ferner ein entfernbares Verriegelungssystem (32) umfasst, das zwischen dem Ankerkopf (30) und der Lagerplatte (26) angeordnet ist, wobei das Vorhandensein des Verriegelungssystems (32) dadurch verhindert, dass der Ankerkopf (30) in die Öffnung (27) und in den Ausgang des ersten röhrenförmigen Bauteils (24) eindringt, dadurch gekennzeichnet, dass die Lagerplatte (26) geeignet ist, in der Konstruktion (42) angeordnet zu werden,
    und dadurch gekennzeichnet, dass die Verankerungsbaugruppe ferner Folgendes umfasst:
    - einen dritten Teil (A), wobei der laufende Abschnitt des Spannkabels (10) in einem zweiten röhrenförmigen Bauteil (22), das eine Füllmasse (23a) aufnehmen kann, und in einem Kanal (43) positioniert ist, wobei der Ausgang des zweiten röhrenförmigen Bauteils (22) mit dem Eingang des ersten röhrenförmigen Bauteils (24) verbunden ist, wobei der Eingang des zweiten röhrenförmigen Bauteils (22) mit dem Kanal (43) verbunden ist, wobei das zweite röhrenförmige Bauteil (22) und der Kanal geeignet sind, in der Konstruktion (42) positioniert zu werden,
    - eine Gegenplatte (41), die den Eingang des ersten röhrenförmigen Bauteils (24) ausbildet, und einen Dichtblock (28), der in dem ersten röhrenförmigen Bauteil (24) angrenzend an die Gegenplatte (41) positionierbar ist, wobei die Litzen (12) durch den Dichtblock (28) verlaufen und wobei der Dichtblock (28) den Innenraum des ersten röhrenförmigen Bauteils (24) von dem Innenraum des zweiten röhrenförmigen Bauteils (22) abdichten kann, um eine Abdichtung für die Füllmasse (23a) auszubilden.
  2. Verankerungsbaugruppe (20) nach Anspruch 1, wobei das Verriegelungssystem (32) entweder mindestens eine geteilte Unterlegscheibe oder eine Mutter umfasst, die mit einem Gewindeabschnitt der Außenseite des Ankerkopfs (30) zusammenwirken können.
  3. Verankerungsbaugruppe (20) nach einem der Ansprüche 1 bis 2, wobei das Spannkabel (10) aus umhüllten und gefetteten Litzen (12) hergestellt ist.
  4. Verankerungsbaugruppe (20) nach Anspruch 1, wobei die Litzen (12) entlang ihres laufenden Teils bis zum und innerhalb des zweiten röhrenförmigen Bauteils (22) umhüllt sind, wobei die Hülle (14) dadurch in die Füllmasse (23a) in dem Kanal (43) und in dem zweiten röhrenförmigen Bauteil (22) eingebettet werden kann und wobei die Litzen (12) in ihren Zwischen- und Endabschnitten (12a), die sich in dem ersten röhrenförmigen Bauteil (24) bis zu ihrem Endpunkt im ersten Teil erstreckt, nicht umhüllt sind.
  5. Verankerungsbaugruppe (20) nach einem der Ansprüche 1 bis 4, wobei die Füllmasse (23a) eine Zementmatrix ist und die umhüllte Litze (12) dadurch in die Zementmatrix eingebettet werden kann.
  6. Verankerungsbaugruppe (20) nach einem der Ansprüche 1 bis 5, wobei der Dichtblock (28) und die Gegenplatte (41) während des Betonierens positioniert werden und wobei die Litzen (12) unmittelbar in den Beton der Konstruktion eingebettet werden können.
  7. Verankerungsbaugruppe (20) nach einem der Ansprüche 1 bis 6, wobei das Ausgangsende des ersten röhrenförmigen Bauteils (24) einen Innendurchmesser (D2) und (D3) aufweist, der größer ist als der Außendurchmesser (D5) des Ankerkopfs (30).
  8. Betonkonstruktion, die mittels mehrerer aus Litzen (12) hergestellter Spannkabel (10) vorgespannt ist, wobei der Hauptabschnitt der Spannkabel (10) einzeln in dem abgebundenen Beton, der den Hauptkörper der Konstruktion ausbildet, eingebettet ist, wobei der abgebundene Beton einen Block (42) ausbildet, der sich aus dem Gießen und dem Abbinden des Betons in einer Schalung ergibt, die nach dem Abbinden des Betons entfernt wird, die für jedes Spannkabel (10) eine Verankerungsbaugruppe (20), die mindestens zwei Teile definiert, umfasst:
    - einen ersten Teil (C), wobei die Litzen (12) des Endabschnitts des Spannkabels (10) durch einzelne Perforationen eines Ankerkopfs (30) geführt werden,
    - einen zweiten Teil (B), wobei ein Zwischenabschnitt des Spannkabels (10) in einem ersten röhrenförmigen Bauteil (24) positioniert ist, das ein entfernbares Schutzprodukt (38) enthält,
    wobei der zweite Teil (B) in der Konstruktion (42) positioniert ist, wobei die Litzen (12), die den Endabschnitt aufweisen, einerseits durch eine Öffnung (27), die in einer Lagerplatte (26) ausgebildet ist, welche an der Außenseite des Blocks in einer angrenzenden Position zum Ausgang des ersten röhrenförmigen Bauteils (24) angeordnet ist, wobei der Ausgang des ersten röhrenförmigen Bauteils (24) und die Öffnung (27) miteinander verbunden sind, und andererseits durch die einzelnen Perforationen des Ankerkopfs (30), der außerhalb des Blocks (42) angeordnet ist, geführt werden, wobei der Ankerkopf (30) einen Außendurchmesser (D5) aufweist, der kleiner ist als der Durchmesser (D4) der Öffnung (27) der Lagerplatte (26),
    wobei er ferner ein entfernbares Verriegelungssystem (32) umfasst, das zwischen den Ankerkopf (30) und die Lagerplatte (26) angeordnet ist, wobei das Vorhandensein des Verriegelungssystems (32) dadurch verhindert, dass der Ankerkopf (30) in die Öffnung und in den Ausgang des ersten röhrenförmigen Bauteils (24) eindringt,
    dadurch gekennzeichnet, dass die Verankerungsbaugruppe ferner Folgendes umfasst:
    - einen dritten Teil (A), wobei der laufende Abschnitt des Spannkabels (10) in einem zweiten röhrenförmigen Bauteil (22), das eine Füllmasse (23a) aufnehmen kann, und in einem Kanal (43) positioniert ist, der Ausgang des zweiten röhrenförmigen Bauteils (22) mit dem Eingang des ersten röhrenförmigen Bauteils (24) verbunden ist, der Eingang des zweiten röhrenförmigen Bauteils (22) mit dem Kanal (43) verbunden ist, wobei das zweite röhrenförmige Bauteil (22) und der Kanal in der Konstruktion (42) positioniert sind,
    - eine Gegenplatte (41), die den Eingang des ersten röhrenförmigen Bauteils (24) ausbildet, und einen Dichtblock (28), der in dem ersten röhrenförmigen Bauteil (24) angrenzend an der Gegenplatte (41) positionierbar ist, wobei die Litzen (12) durch den Dichtblock (28) verlaufen und wobei der Dichtblock (28) den Innenraum des ersten röhrenförmigen Bauteils (24) von dem Innenraum des zweiten röhrenförmigen Bauteils (22) abdichten kann, um eine Abdichtung für die Füllmasse (23a) auszubilden.
  9. Betonkonstruktion nach Anspruch 8, wobei das Spannkabel (10) aus umhüllten und gefetteten Litzen (12) hergestellt ist.
  10. Betonkonstruktion nach einem der Ansprüche 8 bis 9, wobei die Litzen (12) in einem ersten Abschnitt, der sich entlang ihres laufenden Teils bis zum und innerhalb des zweiten röhrenförmigen Bauteils (22) erstreckt, umhüllt sind, wobei die Hülle (14) dadurch in die Füllmasse (23a) in dem Kanal (43) und in dem zweiten röhrenförmigen Bauteil (22) eingebettet werden kann und wobei die Litzen (12) in einem zweiten Abschnitt (12a), der sich in dem ersten röhrenförmigen Bauteil (24) bis zu ihrem Endpunkt erstreckt, nicht umhüllt sind.
  11. Betonkonstruktion nach Anspruch 10, wobei die Füllmasse (23a) Zementmatrix ist, wobei die Hülle dadurch in die Zementmatrix in dem Kanal (43) und dem zweiten röhrenförmigen Bauteil (22) eingebettet werden kann.
  12. Betonkonstruktion nach einem der Ansprüche 8 bis 11, wobei das Verriegelungssystem (32) entweder mindestens eine geteilte Unterlegscheibe oder eine Mutter umfasst, die mit einem Gewindeabschnitt der Außenseite des Ankerkopfs (30) zusammenwirken kann.
  13. Betonkonstruktion nach einem der Ansprüche 8 bis 12, wobei das äußere Ende des ersten röhrenförmigen Bauteils (22) einen Innendurchmesser (D3) und (D2) aufweist, der größer ist als der Außendurchmesser (D5) des Ankerkopfs (30) .
  14. Betonkonstruktion nach Anspruch 8, wobei der Dichtblock (28) und die Gegenplatte (41) während des Betonierens positioniert werden und wobei die Litzen (12) unmittelbar in den Beton der Konstruktion eingebettet werden können.
  15. Verfahren zur Herstellung einer Betonkonstruktion nach einem der Ansprüche 8 bis 14, umfassend die folgenden Schritte:
    - Bauen einer Konstruktion (42), wobei die Lagerplatten (26) in der Konstruktion (42) an der Vorderseite (40) der Konstruktion (42) positioniert sind,
    - wasserdichtes Verbinden des Ausgangs des ersten röhrenförmigen Elements (24) mit der Öffnung (27) der Lagerplatte (26),
    - wasserdichtes Verbinden des Eingangs des ersten röhrenförmigen Elements (24) mit dem Ausgang des zweiten röhrenförmigen Elements (22) mit einer Gegenplatte (41), welche den Eingang des ersten röhrenförmigen Bauteils (24) ausbildet, und einem Dichtblock (28), der in dem ersten röhrenförmigen Bauteil (24) angrenzend an die Gegenplatte (41) positioniert ist,
    - Bereitstellen mit einem Injektionsrohr (23), das aus der Vorderseite (40) heraustritt und mit dem zweiten röhrenförmigen Element (22) gekoppelt ist,
    - Beseitigen der Hüllen der Litzen (12) entlang ihrer Zwischen- und Endabschnitte (12a),
    - in Eingriff bringen eines Endabschnitts eines Spannkabels (10) durch das zweite röhrenförmige Element (22), wobei das erste röhrenförmige Element (24) und die Öffnung (27) mit dem Ende der Litzen (12) über die Außenseite (40) der Konstruktion (42) hinweg positioniert sind,
    - Injizieren von etwas Zementmatrix durch das Injektionsrohr (23) in das zweite röhrenförmige Bauteil (22), sodass alle Litzen (12) in der Zementmatrix entlang eines Segments ihres laufenden Abschnitts eingebettet sind,
    - nach dem Aushärten der Zementmatrix, Entfernen des Dichtblocks (28),
    - in Eingriff bringen des Verriegelungssystems und des Ankerkopfes (30) um den Endpunkt des Endabschnitts des Spannkabels (10) in Richtung der Außenseite (40) der Konstruktion (42),
    - Verriegeln des Verriegelungssystems zwischen dem Ankerkopf (30) und der Lagerplatte (26) und
    - Bereitstellen einer Spannvorrichtung (50) auf dem Endabschnitt des Spannkabels (10) und Spannen des Spannkabels (10).
  16. Verfahren zur Herstellung einer Betonkonstruktion nach Anspruch 15, das ferner die folgenden Schritte umfasst:
    - nach Spannen des Spannkabels (10), Wegräumen des Spannsystems,
    - wasserdichtes Montieren einer Abdeckkappe auf der Lagerplatte (26), wobei die Abdeckkappe das entfernbare Verriegelungselement, den Ankerkopf (30) und den Endabschnitt des Spannkabels (10) beherbergt, und
    - Injizieren des entfernbaren Schutzprodukts (38) in die Abdeckkappe und in das zweite röhrenförmige Bauteil (24).
EP16738224.1A 2015-07-01 2016-06-30 Verankerungsanordnung für eine struktur, betonstruktur mit solch einer anordnung und herstellungsverfahren solch einer betonstruktur Active EP3317471B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH9512015 2015-07-01
PCT/IB2016/053935 WO2017002069A1 (en) 2015-07-01 2016-06-30 Anchorage assembly for a structure, concrete structure with such an assembly, and manufacturing method of such a concrete structure

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FR3075948B1 (fr) * 2017-12-21 2021-06-25 Electricite De France Surveillance de cable de precontrainte a torons clairs et injecte au coulis de ciment
CN110778139A (zh) * 2019-10-21 2020-02-11 上海市政工程设计研究总院（集团）有限公司 一种无粘结预应力筋混凝土板局部开洞施工方法

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US3225499A (en) * 1962-07-02 1965-12-28 Jack P Kourkene Post tensioning concrete reinforcing wires
AU1752167A (en) * 1967-02-09 1968-08-15 Tensioning device for pres-stressed concrete components
DE8716677U1 (de) * 1987-03-13 1988-02-11 Dyckerhoff & Widmann Ag, 8000 Muenchen, De
FR2690189B1 (fr) 1992-04-15 1998-11-13 Freyssinet Int & Co Perfectionnements aux ouvrages en beton precontraint a l'aide de torons gaines graisses et a leurs procedes de construction.
ATE397701T1 (de) * 2001-01-29 2008-06-15 Vsl Int Ag Vorrichtung und verfahren zum verankern eines schrägseilendes auf einer basis
DE20205149U1 (de) * 2002-04-03 2002-07-04 Dywidag Systems Int Gmbh Korrosionsgeschütztes Zugglied, insbesondere Schrägseil für eine Schrägseilbrücke
KR100966457B1 (ko) * 2009-07-24 2010-06-28 이현우 자체적인 부식방지 기능을 갖춘 언본디드 강연선과 내시경 카메라를 이용한 콘크리트 구조물 보강용 포스트텐셔닝 장치 및, 이를 이용한 콘크리트 구조물의 유지관리 방법
RU2515660C1 (ru) 2010-03-26 2014-05-20 Фсл Интернациональ Аг Уплотняющая конструкция

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