EP0004345B1 - Câble de béton armé précontraint et son utilisation pour la construction d'un pont suspendu - Google Patents

Câble de béton armé précontraint et son utilisation pour la construction d'un pont suspendu Download PDF

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Publication number
EP0004345B1
EP0004345B1 EP19790100789 EP79100789A EP0004345B1 EP 0004345 B1 EP0004345 B1 EP 0004345B1 EP 19790100789 EP19790100789 EP 19790100789 EP 79100789 A EP79100789 A EP 79100789A EP 0004345 B1 EP0004345 B1 EP 0004345B1
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EP
European Patent Office
Prior art keywords
cable
reinforced concrete
suspension
steel
posttensioned
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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
Application number
EP19790100789
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German (de)
English (en)
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EP0004345A1 (fr
Inventor
Philipp Dipl.-Ing. Schreck
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Individual
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Individual
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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00—Structural or constructional details of bridges
    • E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
    • E—FIXED CONSTRUCTIONS
    • 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

Definitions

  • the invention relates to a prestressed reinforced concrete rope in a covered concrete body laid in cladding tubes and prestressed steels injected after tightening with cement mortar.
  • Such prestressed reinforced concrete ropes are known for anchoring or suspending loads, and in particular also for the suspension ropes and suspension bars of suspension bridges (DE-A-1 941 978), since suspension bridges made of prestressed concrete, at least as far as maintenance of the bridge is concerned, are considerably cheaper are. It can already be seen today that the use of high-strength steels for steel suspension bridges and steel cable-stayed bridges is becoming increasingly critical, since these high-strength steels are much more susceptible to corrosion. Since it has so far not been possible to find economical processes and techniques in steel construction which permit a long installation of high-strength steels without the necessary and very cost-intensive measures for corrosion protection, the tendency to use prestressed reinforced concrete ropes is becoming ever greater.
  • Another known suspension cable of a cable-stayed bridge (DE-A-2 425 866) consists of a cable core which is guided in a cladding tube and around which a large number of tensioning strands are also arranged in cladding tubes.
  • the cladding tubes are expediently made of plastic.
  • the cladding tubes of the outside tension cables are fastened to the cable core with the help of clamps.
  • the invention has for its object to provide a prestressed reinforced concrete rope in which the cladding tubes and the outer casing tube the reinforcement for the concrete body, i.e. form part of the load-bearing system, while at the same time the impairment of the reinforced concrete rope by the corrosion-promoting influences should be eliminated.
  • the concrete body is surrounded by a corrosion-resistant outer casing tube made of sheet steel, which serves as lost formwork in the manufacture of the concrete body, and that the cladding tubes guided in the outer casing tube by intermediate bulkheads each consist of a steel tube which can be subjected to tension and pressure consist.
  • the outer casing tube is provided with tightly closable openings for introducing the concrete in sections.
  • the prestressed concrete cables manufactured according to the features of the invention can be used for suspension cables and suspension cables of a suspension bridge or for suspension cables of cable-stayed bridges.
  • Such pre-stressed reinforced concrete cables manufactured according to the invention have the advantage that the casing pipe and the steel casing pipes represent the reinforcement for the concrete body, which together with the outer casing pipe has a very high buckling stiffness and practically cannot bulge.
  • Another advantage is that the use of an outer casing tube means that both the cladding tubes and the prestressing steels drawn into the cladding tubes are very well protected against corrosion and dirt during the construction period and therefore have an intimate connection with the inserted concrete due to the good connection surfaces.
  • the invention further provides a method for the use of prestressed reinforced concrete ropes in the manufacture of a suspension bridge, which consists in that for the supporting ropes of the bridge the outer casing tube is suspended in sections with cladding tubes guided in bulkheads on the assembly rope guided over the pylons, so that the cladding tubes are thrown together and the outer casing pipes are screwed or welded to each other so that outer casing pipes with bulkhead-guided cladding pipes are suspended from the work platform for the suspension rods of the bridge, that prestressing steels are drawn into the casing pipes of the supporting cable and hanging rods, so that the interior of the outer casing pipe of the supporting cables and, if necessary the hanging bars it is concreted that the suspension ropes and the suspension rods are, if necessary, gradually pretensioned according to the load, that the longitudinal members of the bridge are suspended either in the free stem or as prefabricated parts on the suspension rods and that the cross members and the carriageway slab are then completed, and that the suspension ropes and the The suspension rods
  • FIG. 1 shows a section through a section of a prestressed reinforced concrete rope according to the invention, an assembly state with a retracted prestressing steel and before the concrete is introduced being shown.
  • annular bulkheads 11 are arranged, through which cladding tubes 12 are guided along the outer edge region.
  • These cladding tubes preferably consist of steel tubes with a relatively large wall thickness, which are connected in sections to sleeves 14. These sleeves 14 are preferably screwed onto external threads on the cladding tubes.
  • a rod-shaped prestressing steel 16 runs through the cladding tubes in a conventional manner. Depending on the length of the reinforced concrete rope, this is built up in sections, the individual cladding tubes being connected with sleeves and the corresponding sections of the outer jacket tubes being welded. Such a welding is identified by reference number 18.
  • the outer casing tube 10 serves as lost formwork and is filled with concrete in its entirety.
  • the cladding tubes made of relatively thick-walled steel tubes together with the bulkheads 11 represent a reinforcement that already gives the reinforced concrete rope an extraordinary strength and buckling stiffness. After prestressing the prestressing steels 16, the cladding tubes are then injected in a conventional manner, which completes the prestressed reinforced concrete rope.
  • a stainless steel is advantageously used for the outer jacket pipe, so that after the prestressed prestressed concrete rope is finished, it is optimally protected against corrosion and requires no maintenance to suppress corrosion.
  • the outer casing pipe can of course also be made of normal steel, which is subsequently coated with a corrosion protection.
  • outer casing pipe as lost formwork and as protection against corrosion-triggering influences results in a pre-tensioned reinforced concrete rope of extremely high quality, whereby the cladding pipes and prestressing steel are already very well protected against dirt and corrosion during the construction period, so that good connection surfaces are preserved and Concreting a perfect connection of concrete and steel is proven. Due to the use of reinforced steel cladding pipes, which already have a certain buckling stiffness and bending stiffness, it is possible that the steel parts can be subjected to tension in the construction state even before the concrete is introduced. It is possible to relieve the steel pipes that are subject to tensile stress by slightly prestressing the prestressing steels.
  • the outer casing pipes are provided at certain intervals with openings through which the concrete is poured. These openings are closed with a lid, which is preferably screwed on.
  • a side view of a suspension bridge is shown in perspective, in which the pre Tensioned reinforced concrete ropes according to the invention are used for the supporting ropes and the hanging bars.
  • the outer casing tubes are provided with a connecting piece 20 for welding or screwing on the outer casing tubes of the hanging rods.
  • an opening 24 which can be closed with a cover 22 and through which a tensioning head 26 can be inserted.
  • This clamping head 26 can be provided with an annular shoulder 28 which rests on a collar 30 of a ring 32 which is preferably welded into the outer casing tube.
  • the production of a suspension bridge using the prestressed reinforced concrete cables according to the invention enables the production of a prestressed concrete suspension bridge for the first time with relatively simple means.
  • the pylons are first created and a mounting rope is tensioned in a conventional manner over which a work platform is suspended.
  • the outer casing tube 10 is suspended in sections with the cladding tubes mounted inside the bulkheads 11 and the cladding tubes are screwed together at the joints by means of sleeves.
  • the joint of the outer casing pipe sections is welded. In this way, all metal parts of the suspension cable are mounted, with outer casing tube sections being attached to the nodes according to the structure according to FIG. 4.
  • the cladding tubes consisting of steel tubes and their sealing and the welding of the individual outer jacket tube sections, a very stable structure suspended from the pylons is created which is already capable of absorbing considerable loads.
  • the prestressing steels are either inserted in sections in the cladding tubes during assembly of the outer jacket tube sections or, after the outer jacket tube has been completed, are threaded into the cladded tubes which are jointed together.
  • the outer jacket tube provided for the hanging rods with the bulkhead-guided cladding tubes is then suspended and screwed onto the connecting piece 20.
  • the cladding tubes running in this section of the outer jacket tube are screwed into the clamping head 26.
  • the suspended outer casing pipes of the hanging rods are closed at the bottom, so that after the metal parts have been assembled, the outer casing pipe of the suspension cable and that of the hanging rods can now be concreted.
  • suspension cable will be partially pretensioned or the pretension will be increased further.
  • both the suspension cables and the hanging bars are pre-tensioned and the prestressing bars are concreted in by injecting concrete.
  • a suspension bridge manufactured according to the method according to the invention using the prestressed reinforced concrete ropes with an outer casing pipe offers the advantage of extraordinary economy due to the lowest maintenance costs when using stainless steel for the outer casing pipes, since the outer casing pipes influence the concrete, be it due to weather conditions or prevented by other influences such as salt water.
  • the method also offers the possibility of producing such a prestressed concrete suspension bridge in an extremely economical manner, since the outer casing pipes are used as lost formwork for the supporting cable and the hanging bars Find.
  • the structural design of the outer casing tubes with the bulkhead-made cladding tubes made of steel tubes makes the manufacture of the supporting rope and hanging rods extremely easy, because when using conventional formwork parts that have to be assembled and disassembled, it is hardly possible to use the supporting rope or the Concrete hanging bars without additional sloping bracing or additional supporting structures.
  • the cladding tubes made of steel tubes which are also guided in bulkheads along the inner wall of the outer casing tube, there is a very stable and stable construction of the suspended metal parts even before concreting, which can be kept in its final position during concreting without support or the like . It is also possible to set the position of the supporting side exactly in the position in which the concrete is poured in and hardens during concreting.
  • the outer casing pipes can be relieved of strain by slightly pretensioning the metal structure hanging between the pylons, so that relatively thin sheets, e.g. in the order of 8 to 10 mm for stainless steel for bridge constructions, can be used, the diameter of the suspension cables being of the order of magnitude from 0.8 to about 1.2 m and the hanging rods with a diameter of about 0.4 to 0.7 m for can move such bridge structures of medium size.
  • the abutment of sections of the outer casing tube shown in FIG. 5 is particularly suitable for outer casing pipes with a large diameter, such as are provided for the suspension cables of suspension bridges.
  • a bulkhead 40 is attached, through which the cladding tubes 12 run at such a distance from the outer casing tube 10 that the two bulkheads 40 of two sections lying against one another can be screwed together with bolts 42.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)

Claims (5)

1. Câble en béton armé précontraint comportant des aciers de précontrainte (16) placés dans des gaines (12) dans un corps en béton entouré d'une enveloppe, et autour desquels, après tension, on injecte du mortier au ciment, caractérisé en ce que
- le corps en béton est entouré par une enveloppe extérieure tubulaire (10) résistant à la corrosion, constituée par une tôle d'acier, qui sert de coffrage perdu lors de la fabrication du corps en béton, et que
- les gaines (12) guidées dans l'enveloppe extérieure en traversant des cloisons intermédiaires (11) sont constituées respectivement par un tube d'acier pouvant encaisser la traction et la compression.
2. Câble selon la revendication 1, caractérisé en ce que l'enveloppe extérieure (10) est munie d'ouvertures pouvant être obturées de façon étanche pour introduire le béton par sections.
3. Câble selon les revendications 1 et 2, caractérisé en ce que le câble en béton armé précontraint est utilisé pour les câbles porteurs et les suspentes d'un pont suspendu.
4. Câble selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'on utilise le câble en béton armé précontraint pour les câbles porteurs de ponts à suspension oblique.
5. Procédé pour utiliser des câbles en béton armé précontraints selon l'une quelconque des revendications 1 à 3, pour la fabrication d'un pont suspendu, dans lequel on place sur les pylones un câble de montage auquel est accrochée une passerelle de travail, caractérisé en ce que
- pour les câbles porteurs du pont, on suspend par sections l'enveloppe extérieure (10), avec des gaines (12) guidées à travers des cloisons, au câbles de montage passant sur les pylones,
- les gaines (12) sont manchonnées ensemble et les enveloppes extérieures sont vissées ou soudées ensemble,
- pour les suspentes du pont, on suspend à partir de la passerelle de travail les enveloppes extérieures (10) avec les gaines (12) guidées dans des cloisons,
- des aciers de précontrainte (16) sont enfilés dans les gaines (12) du câble porteur et des suspentes,
- le volume intérieure de l'enveloppe extérieure (10), des câbles porteurs et éventuellement des suspentes est rempli de béton,
- les câbles porteurs et les suspentes sont précontraints, le cas échéant progressivement, en fonction de la charge,
- les pontres longitudinales du pont sont accrochées aux suspentes, soit en montage en porte-à- faux, soit en tant qu'éléments préfabriqués, et ensuite les poutres transversales et le tablier sont mis en place et terminés,
- les câbles porteurs ainsi que les suspentes sont précontraints définitivement et ainsi que les gaines (12), ils sont remplis de mortier par injection.
EP19790100789 1978-03-17 1979-03-15 Câble de béton armé précontraint et son utilisation pour la construction d'un pont suspendu Expired EP0004345B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19782811759 DE2811759A1 (de) 1978-03-17 1978-03-17 Vorgespanntes stahlbetonseil und verfahren zur anwendung von vorgespannten stahlbetonseilen bei der herstellung einer haengebruecke
DE2811759 1978-03-17

Publications (2)

Publication Number Publication Date
EP0004345A1 EP0004345A1 (fr) 1979-10-03
EP0004345B1 true EP0004345B1 (fr) 1981-12-09

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ID=6034775

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EP19790100789 Expired EP0004345B1 (fr) 1978-03-17 1979-03-15 Câble de béton armé précontraint et son utilisation pour la construction d'un pont suspendu

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EP (1) EP0004345B1 (fr)
AT (1) ATA186279A (fr)
DE (1) DE2811759A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2511721A1 (fr) * 1981-08-21 1983-02-25 Freyssinet Int Stup Dispositif de raccordement incurve entre deux portions rectilignes d'un cable tendu
DE3343352C1 (de) * 1983-11-30 1985-06-05 Max 8228 Freilassing Aicher Verbundkabel für Spannbetonbauwerke, vorzugsweise für Schrägkabelbrücken
DE19710170C2 (de) * 1997-03-12 1999-07-08 Eps Schaub Gmbh Korrosionsschutz-Einrichtung für ein Seil
CN103498589A (zh) * 2013-08-20 2014-01-08 青岛中天斯壮科技有限公司 跨越式柔性拉杆液压张拉器
CN109654295B (zh) * 2018-12-26 2023-10-20 中交第二公路勘察设计研究院有限公司 弯头接入点临时止推块及其施工方法和设计方法
CN109811657B (zh) * 2019-01-23 2021-11-19 南昌大学 一种预制混凝土构件湿接段预应力管道施工方法
CN110593124A (zh) * 2019-10-11 2019-12-20 中交二公局第五工程有限公司 一种悬索桥锚碇前锚室顶盖板及其施工方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2114863B1 (de) * 1971-03-27 1972-08-03 Dyckerhoff & Widmann AG, 8000 München Verankerung eines gespannten Zugglieds für große Belastungen in einem Betonbauteil, z.B. eines Schrägseils einer Schrägseilbrücke
DE2425866A1 (de) * 1974-05-28 1975-12-18 Zueblin Ag Kabel fuer schraegkabelbruecken aus spannbeton

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Publication number Publication date
EP0004345A1 (fr) 1979-10-03
DE2811759A1 (de) 1979-09-20
ATA186279A (de) 1982-12-15

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