EP0703326B1 - Corrosion protected tension member for use in prestressed concrete with post-tensioning - Google Patents

Corrosion protected tension member for use in prestressed concrete with post-tensioning Download PDF

Info

Publication number
EP0703326B1
EP0703326B1 EP95114352A EP95114352A EP0703326B1 EP 0703326 B1 EP0703326 B1 EP 0703326B1 EP 95114352 A EP95114352 A EP 95114352A EP 95114352 A EP95114352 A EP 95114352A EP 0703326 B1 EP0703326 B1 EP 0703326B1
Authority
EP
European Patent Office
Prior art keywords
tension member
anchoring
plate
tension
strands
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.)
Expired - Lifetime
Application number
EP95114352A
Other languages
German (de)
French (fr)
Other versions
EP0703326A1 (en
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
Walter Bau AG
Original Assignee
Dyckerhoff and Widmann AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dyckerhoff and Widmann AG filed Critical Dyckerhoff and Widmann AG
Publication of EP0703326A1 publication Critical patent/EP0703326A1/en
Application granted granted Critical
Publication of EP0703326B1 publication Critical patent/EP0703326B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/08Members specially adapted to be used in prestressed constructions
    • E04C5/12Anchoring devices
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00Structural or constructional details of bridges
    • E01D19/14Towers; Anchors ; Connection of cables to bridge parts; Saddle supports

Definitions

  • the invention relates to a corrosion-protected tension member, primarily a tendon for prestressed concrete without bond according to the preamble of claim 1.
  • Preload with and without bond In the construction of prestressed concrete structures, but especially in the case of bridge structures, they are known Preload with and without bond. Preload with composite is usually used as a preload with a subsequent bond executed.
  • the tendons are arranged in Cladding tubes within the concrete cross section until hardening of the concrete held longitudinally and after tensioning by injecting cement paste into the remaining Annuli are brought into connection with the building. At The tendons are usually pre-stressed without bond outside the concrete cross section, but are opposite to that Supported structure; so you can visit at any time, tightened and if necessary also replaced.
  • tension members of this type are as tension elements so-called monostrands are used, i.e. Steel wire strands that each in an envelope made of plastic, e.g. Polyethylene, arranged and one of the annular space between the tension element and envelope filling, plastically deformable Corrosion protection compound, e.g. Fat, are surrounded (DE-A-37 34 954).
  • the anchor pot itself is inserted into an anchor tube that is in the anchoring area forms the tubular envelope of the tension member.
  • the strands can be retightened and exchanged and it is still possible to pass the anchor pot Cavity between the cladding of the strands and the Inner wall of the tubular casing in the free area of the Tension member with hardening material, in particular Cement mortar to grout.
  • the arrangement of a stuffing box makes one Sealing both against the wrappings of the individual Strands, as well as opposite the tubular casing of the entire tension member reached; the construction is relatively complex and fragile and therefore not for everyone Suitable for use.
  • the object of the invention underlying, an easier and more economical way for sealing the anchoring area of a such tension member to its free area create in which the cavity may be entirely or partly also with a hardening material, e.g. Cement paste, can be filled.
  • a hardening material e.g. Cement paste
  • the main advantage of the invention is that the arrangement of the sealing plate immediately below the Anchor plate on the previously necessary, with Corrosion protection compound filled cavity completely can be dispensed with.
  • the wrappings of each Tension elements are applied through the sealing washer the armature disk brought in or in this, so that the one surrounding the individual elements within their envelopes Corrosion protection compound directly to the holes in material filling the armature disk. Because that Individual elements after removing the wrappings in the Anchoring area still adhering material when Sliding on the anchoring wedges is stripped and the Bores including the blind hole-like extensions Filled out, can usually be filled in by an additional Corrosion protection compound are dispensed in the holes.
  • an anchoring area is a Bundle tendon 1 from a number of individual Tension elements 2 shown.
  • the tension elements 2 consist of So-called monostrands, these are steel wire strands 3, which are used for Corrosion protection with plastic coverings, e.g. Envelope tubes 4, are provided and in which the cavity between the strands 3 and the casing tubes 4 with a plastically deformable anti-corrosion compound, e.g. Fat, is filled out.
  • the strands 3 are made of several parts Ring wedges 5 in conical bores 6 in an armature disk 7 anchored from steel.
  • the armature disk 7 is supported against an anchoring body 8 made of steel, which in a Concrete component 9 is embedded and in this Anchoring area the tubular sheathing of the tension member 1 forms.
  • the tubular casing then sits to the anchoring body 8 in a trumpet 10 Plastic, e.g. PE, to which then a cladding tube 11, again made of plastic, e.g. PE, sealed is.
  • the strands 3 are within the anchoring body 8 their envelopes 4 through holes in a perforated disk 12 passed through, which in turn made of plastic, mainly PE, exists.
  • the perforated disc 12 is below Interposition of one with appropriate holes provided washer 13 from an elastic deformable material, e.g. Neoprene on which the Air side facing away from the armature plate 7.
  • Bolts 14 pass through the armature disk 7 Sealing disc 13 and the perforated disc 12 and allow that Applying a surface pressure to the sealing washer 13 with the result of a seal against the Envelopes 4 of the strands 2 causing transverse expansion.
  • FIGS. 3a to f shows individual successive work phases.
  • the tubular casing of the Bundle tendon 1 consisting of the cladding tube 11, the Trumpet 10 and the anchoring body 8, laid in which the individual tension elements 2 are inserted.
  • the anchor can be mounted inside the remaining tubular duct with a hardening material, e.g. Cement mortar to be filled in to arrange and fix the individual elements 2. After this When this material hardens, the prestress is applied.
  • a hardening material e.g. Cement mortar
  • the strands 3 with the coverings 4 in the Anchoring body 8 introduced; they are at your disposal Tension or anchor required length L over the Anchoring out.
  • the strands 3 with their coverings 4 are already the perforated disc 12 and the sealing disc 13 postponed.
  • the strands 3 in the area the protruding length L stripped to a length l, i.e. freed from the wrappers 4 to the strands 3 individually to be able to anchor (Fig. 3b).

Description

Die Erfindung betrifft ein korrosionsgeschütztes Zugglied, vornehmlich ein Spannglied für Spannbeton ohne Verbund gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a corrosion-protected tension member, primarily a tendon for prestressed concrete without bond according to the preamble of claim 1.

Bei der Konstruktion von Bauwerken aus Spannbeton, insbesondere aber bei Brückenbauwerken, kennt man die Vorspannung mit und ohne Verbund. Vorspannung mit Verbund wird meist als Vorspannung mit nachträglichem Verbund ausgeführt. Dabei werden die Spannglieder durch Anordnung in Hüllrohren innerhalb des Betonquerschnitts bis zum Erhärten des Betons längsbeweglich gehalten und nach dem Spannen durch Injizieren von Zementleim in die verbliebenen Ringräume in Verbund mit dem Bauwerk gebracht werden. Bei Vorspannung ohne Verbund liegen die Spannglieder meist außerhalb des Betonquerschnitts, sind jedoch gegenüber dem Bauwerk abgestützt; sie können so jederzeit besichtigt, nachgespannt und gegebenenfalls auch ausgewechselt werden.In the construction of prestressed concrete structures, but especially in the case of bridge structures, they are known Preload with and without bond. Preload with composite is usually used as a preload with a subsequent bond executed. The tendons are arranged in Cladding tubes within the concrete cross section until hardening of the concrete held longitudinally and after tensioning by injecting cement paste into the remaining Annuli are brought into connection with the building. At The tendons are usually pre-stressed without bond outside the concrete cross section, but are opposite to that Supported structure; so you can visit at any time, tightened and if necessary also replaced.

Bei einem bekannten Zugglied dieser Art sind als Zugelemente sogenannte Monolitzen verwendet, d.h. Stahldrahtlitzen, die jeweils in einer Umhüllung aus Kunststoff, z.B. Polyäthylen, angeordnet und von einer den Ringraum zwischen Zugelement und Umhüllung ausfüllenden, plastisch verformbaren Korrosionsschutzmasse, z.B. Fett, umgeben sind (DE-A-37 34 954). Die Umhüllungen der zum Zwecke der Verankerung in der Ankerscheibe an den Enden abgemantelten Litzen enden in einem mit Korrosionsschutzmasse gefüllten Ankertopf, der in seinem Boden eine der Anzahl der Litzen entsprechende Anzahl von Durchbrechungen aufweist, durch welche die Litzen mit ihren Umhüllungen hindurchgeführt sind. Der Ankertopf selbst ist in ein Ankerrohr eingesetzt, das im Verankerungsbereich die rohrförmige Umhüllung des Zugglieds bildet. Auf diese Weise sind die Litzen nachspannbar und auswechselbar geführt und es ist dennoch möglich, an dem Ankertopf vorbei den Hohlraum zwischen den Umhüllungen der Litzen und der Innenwand der rohrförmigen Umhüllung im freien Bereich des Zugglieds mit erhärtendem Material, insbesondere Zementmörtel, zu verpressen.In a known tension member of this type are as tension elements so-called monostrands are used, i.e. Steel wire strands that each in an envelope made of plastic, e.g. Polyethylene, arranged and one of the annular space between the tension element and envelope filling, plastically deformable Corrosion protection compound, e.g. Fat, are surrounded (DE-A-37 34 954). The wrappings for the purpose of anchoring in the Armature disk stripped at the ends ends in an anchor pot filled with anti-corrosion compound, which in a number corresponding to the number of strands on its bottom of openings through which the strands with their wrappings are passed through. The anchor pot itself is inserted into an anchor tube that is in the anchoring area forms the tubular envelope of the tension member. To this The strands can be retightened and exchanged and it is still possible to pass the anchor pot Cavity between the cladding of the strands and the Inner wall of the tubular casing in the free area of the Tension member with hardening material, in particular Cement mortar to grout.

Um den mit Korrosionsschutzmasse auszufüllenden Hohlraum im Verankerungsbereich möglichst dicht gegenüber dem Bereich abzuschließen, der gegebenenfalls mit einem erhärtenden Material ausgefüllt sein kann, ist es auch bekannt, als der Luftseite abgewandte Begrenzung des mit Fett auszufüllenden Raumes, in dem die Umhüllungen der einzelnen Zugelemente enden, eine Stopfbüchse anzuordnen (EP-A-0 323 285). Zur Betätigung der aus zwei Lochplatten mit zwischengelegter Dichtungsplatte bestehenden Stopfbüchse sind diese und die Ankerscheibe durchsetzende Schraubenbolzen vorgesehen, die, um bei Betätigung der Schraubenbolzen eine Lageveränderung der Stopfbüchse zu verhindern, innerhalb des mit Fett gefüllten Raumes von rohrförmigen Abstandhaltern umgeben sind.In order to fill the cavity in the Anchoring area as close as possible to the area complete, if necessary with a hardening Material can be filled in, it is also known as the Limit facing away from the air side to be filled with fat Space in which the wrappings of the individual tension elements end to arrange a stuffing box (EP-A-0 323 285). For Actuation of two perforated plates with an intermediate one Sealing plate existing stuffing box are this and that Bolts passing through the armature disk are provided, which, to change the position when the bolts are actuated to prevent the stuffing box from getting inside with fat filled space surrounded by tubular spacers are.

Durch die Anordnung einer Stopfbüchse wird zwar eine Abdichtung sowohl gegenüber den Umhüllungen der einzelnen Litzen, als auch gegenüber der rohrförmigen Umhüllung des gesamten Zugglieds erreicht; die Konstruktion ist aber relativ aufwendig und anfällig und deshalb nicht für jeden Anwendungsfall geeignet.The arrangement of a stuffing box makes one Sealing both against the wrappings of the individual Strands, as well as opposite the tubular casing of the entire tension member reached; the construction is relatively complex and fragile and therefore not for everyone Suitable for use.

Vor diesem Hintergrund liegt der Erfindung die Aufgabe zugrunde, eine einfachere und wirtschaftlichere Möglichkeit für eine Abdichtung des Verankerungsbereichs eines derartigen Zugglieds gegenüber seinem freien Bereich zu schaffen, in dem der Hohlraum gegebenenfalls ganz oder teilweise auch mit einem erhärtenden Material, wie z.B. Zementleim, gefüllt sein kann.Against this background, the object of the invention underlying, an easier and more economical way for sealing the anchoring area of a such tension member to its free area create in which the cavity may be entirely or partly also with a hardening material, e.g. Cement paste, can be filled.

Gemäß der Erfindung wird diese Aufgabe durch die im kennzeichnenden Teil des Patentanspruchs 1 angegebenen Merkmale gelöst.According to the invention, this object is achieved by the characterizing part of claim 1 specified Features resolved.

Vorteilhafte Weiterbildungen ergeben sich aus den Unteransprüchen.Advantageous further developments result from the Subclaims.

Der Vorteil der Erfindung besteht vor allem darin, daß durch die Anordnung der Dichtungsplatte unmittelbar unterhalb der Ankerscheibe auf den bislang notwendigen, mit Korrosionsschutzmasse gefüllten Hohlraum vollständig verzichtet werden kann. Die Umhüllungen der einzelnen Zugelemente werden durch die Dichtungsscheibe hindurch an die Ankerscheibe heran- bzw. in diese hineingeführt, so daß die die Einzelelemente innerhalb ihrer Umhüllungen umgebende Korrosionsschutzmasse unmittelbar an das die Bohrungen in der Ankerscheibe ausfüllende Material anschließt. Da das den Einzelelementen nach dem Entfernen der Umhüllungen im Verankerungsbereich noch anhaftende Material beim Aufschieben der Verankerungskeile abgestreift wird und die Bohrungen einschließlich der sacklochartigen Erweiterungen satt ausfüllt, kann meist auf ein zusätzliches Einfüllen von Korrosionsschutzmasse in die Bohrungen verzichtet werden.The main advantage of the invention is that the arrangement of the sealing plate immediately below the Anchor plate on the previously necessary, with Corrosion protection compound filled cavity completely can be dispensed with. The wrappings of each Tension elements are applied through the sealing washer the armature disk brought in or in this, so that the one surrounding the individual elements within their envelopes Corrosion protection compound directly to the holes in material filling the armature disk. Because that Individual elements after removing the wrappings in the Anchoring area still adhering material when Sliding on the anchoring wedges is stripped and the Bores including the blind hole-like extensions Filled out, can usually be filled in by an additional Corrosion protection compound are dispensed in the holes.

Die Erfindung wird nachstehend anhand eines in der Zeichnung dargestellten Ausführungsbeispiels erläutert. Es zeigt

Fig. 1
einen Längsschnitt durch den Verankerungsbereich eines erfindungsgemäßen Zugglieds,
Fig. 1a
ein Detail aus Fig. 1 in größerem Maßstab,
Fig. 2
einen Querschnitt entlang der Linie II-II in Fig. 1 und die
Fig. 3a bis f
einzelne Arbeitsphasen beim Zusammenbau der Verankerung eines erfindungsgemäßen Zugglieds.
The invention is explained below with reference to an embodiment shown in the drawing. It shows
Fig. 1
2 shows a longitudinal section through the anchoring area of a tension member according to the invention,
Fig. 1a
2 shows a detail from FIG. 1 on a larger scale,
Fig. 2
a cross section along the line II-II in Fig. 1 and the
3a to f
individual work phases in the assembly of the anchorage of a tension member according to the invention.

In den Fig. 1 und 2 ist ein Verankerungsbereich eines Bündelspannglieds 1 aus einer Anzahl von einzelnen Zugelementen 2 dargestellt. Die Zugelemente 2 bestehen aus sogenannten Monolitzen, das sind Stahldrahtlitzen 3, die zum Korrosionsschutz mit Umhüllungen aus Kunststoff, z.B. Hüllschläuchen 4, versehen sind und bei denen der Hohlraum zwischen den Litzen 3 und den Hüllschläuchen 4 mit einer plastisch verformbaren Korrosionsschutzmasse, z.B. Fett, ausgefüllt ist. Die Litzen 3 sind mittels mehrteiliger Ringkeile 5 in konischen Bohrungen 6 in einer Ankerscheibe 7 aus Stahl verankert. Die Ankerscheibe 7 stützt sich gegen einen Verankerungskörper 8 aus Stahl ab, der in ein Betonbauteil 9 eingebettet ist und in diesem Verankerungsbereich die rohrförmige Umhüllung des Zugglieds 1 bildet. Die rohrförmige Umhüllung setzt sich im Anschluß an den Verankerungskörper 8 in einer Trompete 10 aus Kunststoff, z.B. PE, fort, an die dann ein Hüllrohr 11, wiederum aus Kunststoff, z.B. PE, dichtend angeschlossen ist.1 and 2, an anchoring area is a Bundle tendon 1 from a number of individual Tension elements 2 shown. The tension elements 2 consist of So-called monostrands, these are steel wire strands 3, which are used for Corrosion protection with plastic coverings, e.g. Envelope tubes 4, are provided and in which the cavity between the strands 3 and the casing tubes 4 with a plastically deformable anti-corrosion compound, e.g. Fat, is filled out. The strands 3 are made of several parts Ring wedges 5 in conical bores 6 in an armature disk 7 anchored from steel. The armature disk 7 is supported against an anchoring body 8 made of steel, which in a Concrete component 9 is embedded and in this Anchoring area the tubular sheathing of the tension member 1 forms. The tubular casing then sits to the anchoring body 8 in a trumpet 10 Plastic, e.g. PE, to which then a cladding tube 11, again made of plastic, e.g. PE, sealed is.

Innerhalb des Verankerungskörpers 8 sind die Litzen 3 mit ihren Umhüllungen 4 durch Bohrungen in einer Lochscheibe 12 hindurchgeführt, die wiederum aus Kunststoff, vornehmlich PE, besteht. Die Lochscheibe 12 liegt unter Zwischenschaltung einer mit entsprechenden Bohrungen versehenen Dichtungsscheibe 13 aus einem elastisch verformbaren Material, wie z.B. Neoprene, an der der Luftseite abgewandten Seite der Ankerscheibe 7 an. Schraubenbolzen 14 durchsetzen die Ankerscheibe 7, die Dichtungsscheibe 13 und die Lochscheibe 12 und erlauben das Aufbringen eines Flächendruckes auf die Dichtungsscheibe 13 mit der Folge einer eine Abdichtung gegenüber den Umhüllungen 4 der Litzen 2 bewirkenden Querdehnung.The strands 3 are within the anchoring body 8 their envelopes 4 through holes in a perforated disk 12 passed through, which in turn made of plastic, mainly PE, exists. The perforated disc 12 is below Interposition of one with appropriate holes provided washer 13 from an elastic deformable material, e.g. Neoprene on which the Air side facing away from the armature plate 7. Bolts 14 pass through the armature disk 7 Sealing disc 13 and the perforated disc 12 and allow that Applying a surface pressure to the sealing washer 13 with the result of a seal against the Envelopes 4 of the strands 2 causing transverse expansion.

Um die Litzen 3 in der gebotenen Weise in der Ankerscheibe 7 verankern zu können, sind über einen Endbereich bestimmter Länge die Umhüllungen 4 entfernt; die Umhüllungen 4 reichen an dieser Stelle in sacklochartige Erweiterungen 6a der Bohrungen 6 in der Ankerscheibe 7 hinein.Around the strands 3 in the required manner in the armature disk 7 anchoring are more specific over an end area Length of wrappers 4 removed; the wrappings 4 are enough at this point in blind hole-like extensions 6a Bores 6 in the armature disk 7.

Die Arbeitsweise bei der Montage einer solchen Verankerung kann anhand der Fig. 3a bis f beschrieben werden, die einzelne aufeinanderfolgende Arbeitsphasen zeigt.How it works when installing such an anchor can be described with reference to FIGS. 3a to f shows individual successive work phases.

Grundsätzlich wird zunächst die rohrförmige Umhüllung des Bündelspannglieds 1, bestehend aus dem Hüllrohr 11, der Trompete 10 und dem Verankerungskörper 8, verlegt, in welche die einzelnen Zugelemente 2 eingeschoben werden. Nach dem Montieren der Verankerung kann der innerhalb der rohrförmigen Umhüllung verbliebene Spannkanal mit einem erhärtenden Material, z.B. Zementmörtel, verfüllt werden, um die Einzelelemente 2 zu ordnen und zu fixieren. Nach dem Erhärten dieses Materials wird die Vorspannung aufgebracht.Basically, the tubular casing of the Bundle tendon 1, consisting of the cladding tube 11, the Trumpet 10 and the anchoring body 8, laid in which the individual tension elements 2 are inserted. After this The anchor can be mounted inside the remaining tubular duct with a hardening material, e.g. Cement mortar to be filled in to arrange and fix the individual elements 2. After this When this material hardens, the prestress is applied.

Das Ausfüllen des Spannkanals innerhalb der rohrförmigen Umhüllung 8, 10, 11 ermöglicht eine Fixierung der Umhüllungen 4 der Litzen 3 gegen Längenänderungen infolge von Temperaturunterschieden durch Aufbringen kurzer Stücke eines Schrumpfschlauches 4a, die durch Einbettung in das erhärtende Material keine Lageänderungen zulassen (Fig. 1).Filling the tension channel inside the tubular Envelope 8, 10, 11 allows fixation of the Envelopes 4 of the strands 3 against changes in length as a result of temperature differences by applying short pieces a shrink tube 4a, which by embedding in the hardening material do not allow changes in position (Fig. 1).

Gemäß Fig. 3a sind die Litzen 3 mit den Umhüllungen 4 in den Verankerungskörper 8 eingeführt; sie stehen um die zum Spannen bzw. Verankern erforderliche Länge L über die Verankerung hinaus. Auf die Litzen 3 mit ihren Umhüllungen 4 sind bereits die Lochscheibe 12 und die Dichtungsscheibe 13 aufgeschoben. Als nächstes werden die Litzen 3 im Bereich der überstehenden Länge L bis auf eine Länge l abgemantelt, d.h. von den Umhüllungen 4 befreit, um die Litzen 3 einzeln verankern zu können (Fig. 3b). According to Fig. 3a, the strands 3 with the coverings 4 in the Anchoring body 8 introduced; they are at your disposal Tension or anchor required length L over the Anchoring out. On the strands 3 with their coverings 4 are already the perforated disc 12 and the sealing disc 13 postponed. Next, the strands 3 in the area the protruding length L stripped to a length l, i.e. freed from the wrappers 4 to the strands 3 individually to be able to anchor (Fig. 3b).

Auf die freigelegten Enden der Litzen 3 wird sodann die Ankerscheibe 7 aufgeschoben (Fig. 3c), die mit der Lochscheibe 12 unter Zwischenlage der Dichtungsscheibe 13 lose verbunden und in den Verankerungskörper 8 hineingeschoben wird, bis sie an dessen luftseitiger Abstützfläche anliegt (Fig. 3d). Da die Umhüllungen 4 der Litzen 3 sich durch Temperatureinflüsse verkürzen können, ist es empfehlenswert, die Umhüllungen etwas länger zu lassen, so daß sie beim Aufsetzen der Ankerscheibe 7 unter Stauchdruck geraten. Die Verbindung von Lochscheibe 12 und Ankerscheibe 7 erfolgt über die Schraubenbolzen 14.Then on the exposed ends of the strands 3 Armature disk 7 pushed on (Fig. 3c), with the Perforated disc 12 with the washer 13 in between loosely connected and in the anchoring body 8 is pushed in until it is on the air side Support surface is present (Fig. 3d). Since the wrappings 4 the Strands 3 can shorten due to temperature influences, it is recommended to keep the wrappings a little longer leave so that when you put the armature plate 7 under Compression pressure got. The connection of perforated disc 12 and Armature disk 7 is carried out via the bolts 14.

In den Fig. 3e und 3f ist dann noch dargestellt, wie die Ankerscheibe 7 in ihrer Lage mittels einer Ringscheibe 15 und im Verankerungskörper 8 verankerter Schraubenbolzen 16 in ihrer Lage gesichert (Fig. 3e) und wie nach dem Einsetzen der Ringkeile 5 in die Bohrungen 6 in der Ankerscheibe 7 eine Keilsicherungsplatte 17 montiert wird, um die Keile 5 bis zum endgültigen Spannen in ihrer Lage zu halten.3e and 3f it is then shown how the Armature disk 7 in its position by means of an annular disk 15 and bolts 16 anchored in the anchoring body 8 secured in their position (Fig. 3e) and as after insertion the ring wedges 5 into the bores 6 in the armature disk 7 a wedge lock plate 17 is mounted around the wedges 5 hold in place until final tensioning.

Das Zusammenpressen der Dichtungsscheibe 13 mittels der Schraubenbolzen 14 zur Aktivierung der Dichtung erfolgt dann nach dem Aufbringen der endgültigen Spannkraft auf die Litzen 3. Dabei ist es, um eine möglichst gute Abdichtung zu erreichen, möglich, nicht nur, wie beschrieben, eine Lochscheibe 12 und eine Dichtungsscheibe 13, sondern jeweils zwei oder mehrere solcher Scheiben unmittelbar hintereinander anzuordnen und sie in entsprechender Weise durch sie axial durchsetzende Schraubenbolzen unter axialen Druck zu setzen.The compression of the sealing washer 13 by means of the Bolt 14 for activating the seal then takes place after applying the final tension to the Strands 3. It is to ensure the best possible seal achieve, possible, not just as described, one Perforated disk 12 and a sealing washer 13, but each two or more such disks immediately arrange them one after the other and use them in the same way through them axially penetrating bolts under axial To put pressure.

Nach Beendigung der Spannarbeiten werden die überstehenden Enden 3a der Litzen abgeschnitten und - unter Zwischenlage einer Gummidichtung 18 - eine Schutzkappe 19 aufgeschraubt, die durch Injektion mit Korrosionsschutzmaterial 20 verfüllt wird (Fig. 1).After the tensioning work has been completed, the remaining ones Cut ends 3a of the strands and - with intermediate layer a rubber seal 18 - a protective cap 19 screwed on, which is filled by injection with corrosion protection material 20 will (Fig. 1).

Claims (4)

  1. A corrosion-protected tension member, especially a tendon for prestressed concrete without bonding, comprising a plurality of tension elements, such as steel rods, wires or strands, arranged inside a tubular sheathing, which in turn are each arranged in a sheathing of plastics material and are surrounded by plastically deformable corrosion-protection material, wherein at its ends the tension member has anchoring means with a respective anchoring plate provided with bores for the passage of the tension elements, characterised in that the tension elements (2) are directed with their sheathings (4) through bores in at least one perforated plate (12) and at least one sealing plate (13) provided with corresponding bores, wherein, with the interposition of the sealing plate (13), the perforated plate (12) can be pressed against the side of the anchoring plate (7) remote from the exterior.
  2. A tension member according to Claim 1, characterised in that, for the insertion of the ends of the sheathings (4) of the tension elements (2), the bores (6) in the anchoring plate (7) are widened (6a) in the manner of a blind hole on the side remote from the exterior.
  3. A tension member according to Claim 1 or 2, characterised in that the sealing plate (13) can be compressed by means of bolts (14) passing through the perforated plate (12) and the anchoring plate (7).
  4. A tension member according to any one of Claims 1 to 3, characterised in that the hollow space between the tension elements (2) and the tubular sheathing is filled with a material which sets, for example cement mortar, at least in the zones adjoining the anchoring means.
EP95114352A 1994-09-22 1995-09-13 Corrosion protected tension member for use in prestressed concrete with post-tensioning Expired - Lifetime EP0703326B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4433832 1994-09-22
DE4433832A DE4433832A1 (en) 1994-09-22 1994-09-22 Corrosion-protected tension member, primarily tendon for prestressed concrete without bond

Publications (2)

Publication Number Publication Date
EP0703326A1 EP0703326A1 (en) 1996-03-27
EP0703326B1 true EP0703326B1 (en) 1999-11-03

Family

ID=6528892

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95114352A Expired - Lifetime EP0703326B1 (en) 1994-09-22 1995-09-13 Corrosion protected tension member for use in prestressed concrete with post-tensioning

Country Status (2)

Country Link
EP (1) EP0703326B1 (en)
DE (2) DE4433832A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003083216A1 (en) 2002-04-03 2003-10-09 Dywidag-Systems International Gmbh Anchoring device for a corrosion-protected tractive member, in particular an oblique cable for a cable-stayed bridge
EP2697447B1 (en) 2011-04-15 2016-02-24 Soletanche Freyssinet Method of protecting the end of a multi-tendon cable
EP2550400B1 (en) 2010-03-26 2020-06-24 VSL International AG Sealing arrangement
US10889988B2 (en) 2013-08-01 2021-01-12 Dywidag-Systems International Gmbh Corrosion-protected tension member and plastically deformable disc of corrosion protection material for such a tension member

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1058726A (en) * 1996-06-13 1998-03-03 Ricoh Co Ltd Image-recording apparatus
DE19801786A1 (en) * 1998-01-19 1999-07-29 Suspa Spannbeton Gmbh Anchor system for tensioners and anchors in prestressed concrete construction
DE19833273A1 (en) * 1998-07-24 2000-01-27 Josef Eibl Tension member arrangement for pre-stressed concrete structures such as bridges, has tension members running in casing tubes laid in concrete cross-section
FR2783266B1 (en) * 1998-09-16 2000-12-15 Spie Precontrainte REPLACEABLE ANCHORING MEMBER, MIXED PROTECTION DEVICE, REPLACEABLE EXTERNAL PRESSURE SYSTEM AND STRUCTURE
DE19918438A1 (en) * 1999-04-23 2000-11-09 Dyckerhoff & Widmann Ag Steel tensioning member protected against corrosion comprises plastic cover element which is provided with protrusions distributed as far as possible uniformly over its length and circumference
DE20311950U1 (en) 2003-08-02 2004-12-09 Dywidag-Systems International Gmbh Corrosion-protected tension member, in particular tendon for prestressed concrete
KR101104212B1 (en) * 2008-06-04 2012-01-10 아주대학교산학협력단 Prestressed Tendon Anchoring Apparatus
CN103147538B (en) * 2013-03-01 2015-12-30 柳州欧维姆机械股份有限公司 A kind of anchor head sealing structural component
CN104563395A (en) * 2015-01-06 2015-04-29 大连理工大学 Corrosion-protective structure of external prestressed anchorage device
CN111041970B (en) * 2019-12-17 2021-03-16 北京市第三建筑工程有限公司 Prestressed single-lug inhaul cable and tensioning method thereof
CN113137007A (en) * 2021-04-27 2021-07-20 郑亮 Carbon fiber plate anchorage device

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8327978D0 (en) * 1983-10-19 1983-11-23 Manuf Aceros Caucho Sa Cable anchorage
DE3644551C2 (en) * 1986-12-24 1994-12-08 Zueblin Ag Anchoring for a composite tendon
DE8716677U1 (en) * 1987-03-13 1988-02-11 Dyckerhoff & Widmann Ag, 8000 Muenchen, De
DE3801451C2 (en) * 1987-10-15 1994-09-29 Dyckerhoff & Widmann Ag Corrosion-protected free tension member, primarily tendon for prestressed concrete without bond
FR2623551B1 (en) * 1987-11-25 1992-04-24 Freyssinet Int Stup IMPROVEMENTS ON SURFACES AND THEIR COMPONENTS
FR2628777B1 (en) * 1988-03-18 1990-08-17 Vsl France ANCHORING DEVICE FOR PRESTRESSED CABLES FOR MASONRY-TYPE WORKS
DE3831518C2 (en) * 1988-09-16 1994-12-22 Holzmann Philipp Ag Tendon in a polygonal arrangement and method for retracting the tendon
DE9012786U1 (en) * 1990-09-07 1990-11-08 Dyckerhoff & Widmann Ag, 8000 Muenchen, De
DE4118897A1 (en) * 1991-06-08 1992-12-10 Hochtief Ag Hoch Tiefbauten Building component anchor system e.g. for strands in concrete block, etc. - has shrouding tube around anchor cables with sepg. and lubricating coating, giving easy exchange of clamp

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003083216A1 (en) 2002-04-03 2003-10-09 Dywidag-Systems International Gmbh Anchoring device for a corrosion-protected tractive member, in particular an oblique cable for a cable-stayed bridge
EP2550400B1 (en) 2010-03-26 2020-06-24 VSL International AG Sealing arrangement
EP2697447B1 (en) 2011-04-15 2016-02-24 Soletanche Freyssinet Method of protecting the end of a multi-tendon cable
US10889988B2 (en) 2013-08-01 2021-01-12 Dywidag-Systems International Gmbh Corrosion-protected tension member and plastically deformable disc of corrosion protection material for such a tension member

Also Published As

Publication number Publication date
DE4433832A1 (en) 1996-03-28
DE59507171D1 (en) 1999-12-09
EP0703326A1 (en) 1996-03-27

Similar Documents

Publication Publication Date Title
DE3734954C2 (en)
DE3437107C2 (en)
EP0703326B1 (en) Corrosion protected tension member for use in prestressed concrete with post-tensioning
EP0606820B1 (en) Anchoring device for at least one tension member in a sleeve and installation method for the anchoring device
EP1505223B1 (en) Corrosion protected tendon, especially for prestressed concrete
DE3734953C2 (en) Spacer for a tension member
DE3224702C2 (en) Device for anchoring and coupling a bundle tendon for prestressed concrete
CH676617A5 (en)
EP0196451A1 (en) Tension element for a rock bolt or the like
DE3138807A1 (en) FREE LINK, IN PARTICULAR CABLE ROPE FOR A CABLE ROPE BRIDGE
DE19528999C2 (en) Connection of prestressed concrete elements and method for this
DE3838069C2 (en) Transportable reinforcement unit that can be concreted in for prestressing reinforced concrete structures
CH623376A5 (en)
DE3644551C2 (en) Anchoring for a composite tendon
DE3801451C2 (en) Corrosion-protected free tension member, primarily tendon for prestressed concrete without bond
DE2944878A1 (en) Concrete reinforcing rod or wire corrosion protection - involves tight full length metal sheath form locked round it
DE2114863B1 (en) Anchoring of a tensioned tension member for high loads in a concrete component, e.g. a stay cable of a cable-stayed bridge
EP0722024A1 (en) Corrosion protected free tension member, in particular tendon for prestressed concrete without bonding
DE3703974A1 (en) Tension member comprising high-strength fibres
DE3302075C2 (en) Connection for prestressed concrete or reinforced concrete bending beams
DE19634682C2 (en) Seal for delimiting areas to be filled with a sealing compound on a bundle tension member for prestressed concrete
AT396153B (en) TENSION
DE3339058A1 (en) Exposed tightenable tension member comprising one or more tension elements, such as steel rods, wires or strands
DE4437104C1 (en) Anchorage for clamp with supplementary bellied wire strands
DE3005047A1 (en) Prestressed concrete component with one or more tendons

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE DE FR NL

17P Request for examination filed

Effective date: 19960301

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

17Q First examination report despatched

Effective date: 19990222

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

RIN1 Information on inventor provided before grant (corrected)

Inventor name: DIE ERFINDER HABEN AUF IHRE NENNUNG VERZICHTET

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE DE FR NL

REF Corresponds to:

Ref document number: 59507171

Country of ref document: DE

Date of ref document: 19991209

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
BECA Be: change of holder's address

Owner name: *DYWIDAG-SYSTEMS INTERNATIONAL G.M.B.H.DYWIDAGSTRA

Effective date: 20030423

BECH Be: change of holder

Owner name: *DYWIDAG-SYSTEMS INTERNATIONAL G.M.B.H.

Effective date: 20030423

NLS Nl: assignments of ep-patents

Owner name: WALTER BAU-AKTIENGESELLSCHAFT

Owner name: DYWIDAG-SYSTEMS INTERNATIONAL GMBH

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20120925

Year of fee payment: 18

Ref country code: DE

Payment date: 20120927

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20120924

Year of fee payment: 18

BERE Be: lapsed

Owner name: *DYWIDAG-SYSTEMS INTERNATIONAL G.M.B.H.

Effective date: 20130930

REG Reference to a national code

Ref country code: NL

Ref legal event code: V1

Effective date: 20140401

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 59507171

Country of ref document: DE

Effective date: 20140401

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140401

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140401

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20140917

Year of fee payment: 20