EP0722024B1 - Korrosionsgeschütztes freies Zugglied, insbesondere Spannglied für Spannbeton ohne Verbund - Google Patents
Korrosionsgeschütztes freies Zugglied, insbesondere Spannglied für Spannbeton ohne Verbund Download PDFInfo
- Publication number
- EP0722024B1 EP0722024B1 EP96100100A EP96100100A EP0722024B1 EP 0722024 B1 EP0722024 B1 EP 0722024B1 EP 96100100 A EP96100100 A EP 96100100A EP 96100100 A EP96100100 A EP 96100100A EP 0722024 B1 EP0722024 B1 EP 0722024B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tension member
- member according
- sheathing
- tension
- annular space
- 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
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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
- E04C5/10—Ducts
-
- 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
Definitions
- the invention relates to a corrosion-protected free Tension member, in particular a tendon for prestressed concrete without Composite, of at least two within a tubular Sheathing arranged tensile elements, such as steel rods, -wires or strands, at least in its course is redirected once.
- Prestressing When erecting prestressed concrete structures, Prestressing is known, particularly in bridge structures with and without composite. Prestressing with composite is usually considered Preload with subsequent bond.
- the tendons within the concrete cross section Stretching channels guided longitudinally, after hardening of the Concrete tensioned and anchored to the building as well by injecting cement paste into the tensioning channels Brought together with the building. With preload without The tendons are usually outside the Concrete cross section, however, are opposite the building supported; they can be viewed and retightened at any time and, if necessary, also be replaced.
- the object of the invention under consideration of the requirements of the Corrosion protection a more economical design for free Specify tendons at their deflection points.
- the inventive design of the tension member is limited but not only in the design of the deflection points its course. Rather, it can be used as needed, e.g. with increased mechanical protection or Fire protection requirements, just as well on the free Distance, i.e. next to the deflection points in the rest Use areas of the tension member, but also in direct connection to an anchor at the end of the Tension member.
- the envelope 4 consists here of an outer Sheath 5 made of plastic, e.g. Polyethylene, with smooth Surface, and one within it within a short distance of which is arranged inner jacket 6 with a Cross-ribbed tube, which is also made of plastic or can also consist of sheet metal.
- annular space 7 Between the outer jacket 5 and the inner jacket 6 This creates an annular space 7. At a defined distance between the outer and inner sheaths 5 and 6 respectively ensure spacers 8 are arranged.
- the Spacers 8 are annular and with Breakthroughs or recesses, primarily on their outer edge touching the outer jacket 5 to the passage of the to be pressed into the annular space 7 Material.
- the Annulus 7 At the front is the Annulus 7 each closed by a sealing ring 9.
- a flowable hardening material such as. Inject cement or synthetic resin mortar.
- the sheath 4 closes at both ends tight, e.g. by means of electric welding sleeves 10 to which Piping 11 on the free length of the tension member 1. Forces, the tensioning of the tension elements 12 on the inner jacket 6 the envelope 4 act and thus a shift of the inner Mantle 6 could cause over one non-positive connection between the inner jacket 6 and the piping 11 removed over this.
- a tension member 1 according to the invention When installing a tension member 1 according to the invention in a Concrete structure is usually the area of the deflection point manufactured first.
- the method of installation is in the Fig. 3 and 4 and 5 and 6 illustrates, but on Example of a saddle 2a formed on the structure symmetrically guided tension member 1.
- the tensioning channel is first concreted in curved formwork tube 13 formed.
- this Formwork tube 13 is then the tubular casing 4, consisting of the outer jacket 5 and the inner jacket 6 inserted.
- the distance between the inner jacket 6 and the outer jacket 5 is secured by spacers which 3 as helix 14 are formed.
- the individual Tension elements 12 usually steel wire strands, introduced and the piping 11 in the area of the free length of the Tendon to the sheathing 4 in the deflection area connected.
- the tension elements 12 are located at the deflection point due to the forced change of direction close to the Inner surface of the inner shell 6 and so press the Envelope 4 in the deflection area against the formwork tube 13 or the concrete component.
- the cavity 18 within the envelope 4 can, if the individual tension elements 12 made of so-called fat strands persist, remain free; it is bare, so strands not protected by fat and a covering, so this cavity must also be filled with anti-corrosion compound become.
- the deflection Vent line 19 with a vent opening 20 provided through an opening in the piping 11 after is led outside.
- spacers 21 that spring apart at intervals arranged.
- These spacers 21 can be made, for example short sections of a plastic pipe that consist allow to compress in the manner shown in FIG. 6 and so the vent line 19 in the apex of the casing 4th hold.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Reinforcement Elements For Buildings (AREA)
Description
- Fig. 1
- einen Längsschnitt durch eine erste Ausführungsform eines erfindungsgemäßen Zugglieds an einer Umlenkstelle,
- Fig. 2
- einen Querschnitt durch das in Fig. 1 dargestellte Zugglied entlang des Schnittes II-II,
- Fig. 3
- am Beispiel einer weiteren Ausführungsform die Entlüftung des Ringraumes beim Verpressen mit erhärtendem Material,
- Fig. 4
- einen Querschnitt entlang der Linie IV-IV in Fig. 3,
- Fig. 5
- eine Möglichkeit für die Entlüftung des inneren Hohlraumes beim Verpressen und
- Fig. 6
- einen Querschnitt entlang der Linie VI-VI in Fig. 5.
Claims (13)
- Korrosionsgeschütztes freies Zugglied (1), insbesondere Spannglied für Spannbeton ohne Verbund, aus mindestens zwei innerhalb einer rohrförmigen Umhüllung (4) angeordneten Zugelementen (12), wie Stahlstäben, -drähten oder -litzen, das in seinem Verlauf mindestens einmal umgelenkt wird, dadurch gekennzeichnet, daß die Umhüllung (4) zumindest an den Umlenkstellen aus einem äußeren Mantel (5) und einem in lichtem Abstand von diesem gehaltenen inneren Mantel (6) besteht und daß der dadurch entstehende Ringraum (7) mit einem erhärtenden Material ausgefüllt ist.
- Zugglied nach Anspruch 1, dadurch gekennzeichnet, daß der äußere Mantel (5) aus einem Rohr mit glatter Oberfläche besteht.
- Zugglied nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der innere Mantel (6) aus einem Rohr besteht, das mit quer zu seiner Längsachse verlaufenden Rippen versehen ist.
- Zugglied nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß zur Fixierung des Abstandes zwischen dem äußeren Mantel (5) und dem inneren Mantel (6) Abstandhalter (8) angeordnet sind.
- Zugglied nach Anspruch 4, dadurch gekennzeichnet, daß die Abstandhalter ringförmig ausgebildet sind und Durchbrechungen und/oder Ausnehmungen aufweisen.
- Zugglied nach Anspruch 4, dadurch gekennzeichnet, daß als Abstandhalter eine Wendel (14) aus Stahldraht vorgesehen ist.
- Zugglied nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß der Ringraum zwischen dem inneren Mantel (6) und dem äußeren Mantel (5) stirnseitig mittels Dichtringen (9) verschlossen ist.
- Zugglied nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß das in dem Ringraum (7) befindliche erhärtende Material Zement- oder Kunstharzmörtel ist.
- Zugglied nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß das im Ringraum (7) befindliche erhärtende Material bewehrt ist.
- Zugglied nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die Umhüllung (4) aus biegsamem Material besteht.
- Zugglied nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, daß der Hohlraum zwischen dem inneren Mantel(6) und den einzelnen Zugelementen (12) mit einer Vergußmasse ausgefüllt ist.
- Zugglied nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß die Umhüllung (4) im Bereich der Umlenkstelle dicht mit der anschließenden Verrohrung (11) des Zugglieds (1) verbunden ist.
- Zugglied nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, daß der äußere Mantel (5) der Umhüllung (4) kraftschlüssig mit der Verrohrung (11) verbunden ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29500560U | 1995-01-14 | ||
DE29500560U DE29500560U1 (de) | 1995-01-14 | 1995-01-14 | Korrosionsgeschütztes freies Zugglied, vornehmlich Spannglied für Spannbeton ohne Verbund |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0722024A1 EP0722024A1 (de) | 1996-07-17 |
EP0722024B1 true EP0722024B1 (de) | 1999-02-24 |
Family
ID=8002514
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96100100A Expired - Lifetime EP0722024B1 (de) | 1995-01-14 | 1996-01-05 | Korrosionsgeschütztes freies Zugglied, insbesondere Spannglied für Spannbeton ohne Verbund |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0722024B1 (de) |
JP (1) | JP2796566B2 (de) |
DE (2) | DE29500560U1 (de) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19634682C2 (de) * | 1996-08-28 | 1999-07-08 | Dyckerhoff & Widmann Ag | Dichtung zur Begrenzung von mit einer Vergußmasse auszufüllenden Bereichen an einem Bündelzugglied für Spannbeton |
DE19743876A1 (de) * | 1997-10-04 | 1999-04-29 | Bilfinger Berger Bau | Spannglied |
DE19845200C2 (de) * | 1998-10-01 | 2002-09-26 | Bilfinger Berger Ag | Hüllrohr für ein Spannglied ohne Verbund |
DE19858001A1 (de) * | 1998-12-16 | 2000-06-21 | Bilfinger Berger Bau | Externes Spannglied |
DE10134777B4 (de) * | 2001-07-06 | 2008-11-20 | Martin Krone | Bauwerk und Verfahren zu seiner Herstellung |
CN1710207B (zh) * | 2005-07-11 | 2010-11-03 | 上海市政工程设计研究院 | 一种钢绞线后张预应力孔道压浆方法 |
IN2013MN00395A (de) | 2010-08-03 | 2015-05-29 | Soletanche Freyssinet | |
CN109162206A (zh) * | 2018-10-30 | 2019-01-08 | 中国十七冶集团有限公司 | 一种现浇箱梁预应力钢束的施工结构及其施工方法 |
CN112049027A (zh) * | 2020-09-04 | 2020-12-08 | 上海市机械施工集团有限公司 | 预应力孔道的补救方法 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH299955A (de) * | 1950-07-18 | 1954-07-15 | Baur Willi | Verfahren zum Herstellen von Bauteilen aus Spannbeton. |
DE1130988B (de) * | 1956-12-10 | 1962-06-07 | Rudolf Buehrer Dipl Ing | Spannglied aus mehreren Einzeldraehten oder -staeben |
US3060640A (en) * | 1959-06-11 | 1962-10-30 | Span Tendons Ltd | Cables for prestressing concrete |
FR1587229A (de) * | 1968-10-25 | 1970-03-13 | ||
DE3734953C2 (de) * | 1987-03-13 | 1994-02-24 | Dyckerhoff & Widmann Ag | Abstandhalter für ein spannbares Zugglied |
DE3734954A1 (de) * | 1987-03-13 | 1988-04-07 | Dyckerhoff & Widmann Ag | Korrosionsgeschuetztes zugglied, vornehmlich spannglied fuer spannbeton ohne verbund und verfahren zu seinem einbau |
DE3731722A1 (de) * | 1987-09-21 | 1989-04-06 | Suspa Spannbeton Gmbh | Umlenkkoerper fuer spannelemente eines spanngliedes zur vorspannung von spannbetontragwerken |
DE3831069A1 (de) * | 1988-09-13 | 1990-03-22 | Dyckerhoff & Widmann Ag | Zugglied mit einer ummantelung und verfahren zu seiner herstellung |
FR2662725A1 (fr) * | 1990-05-31 | 1991-12-06 | Dyckerhoff & Widmann Ag | Procede de fabrication d'un membre tendu compose d'un faisceau d'elements. |
DE4118897A1 (de) * | 1991-06-08 | 1992-12-10 | Hochtief Ag Hoch Tiefbauten | Bauwerkslagereinrichtung fuer ein spannglied und verfahren zum auswechseln eines solchen spanngliedes |
-
1995
- 1995-01-14 DE DE29500560U patent/DE29500560U1/de not_active Expired - Lifetime
-
1996
- 1996-01-05 EP EP96100100A patent/EP0722024B1/de not_active Expired - Lifetime
- 1996-01-05 DE DE59601319T patent/DE59601319D1/de not_active Expired - Lifetime
- 1996-01-11 JP JP8003260A patent/JP2796566B2/ja not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE59601319D1 (de) | 1999-04-01 |
JP2796566B2 (ja) | 1998-09-10 |
JPH08253982A (ja) | 1996-10-01 |
EP0722024A1 (de) | 1996-07-17 |
DE29500560U1 (de) | 1996-05-15 |
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