EP0624697A1 - Stressed steel reinforcement for prestressed concrete sleepers with grouted anchoring - Google Patents

Stressed steel reinforcement for prestressed concrete sleepers with grouted anchoring Download PDF

Info

Publication number
EP0624697A1
EP0624697A1 EP94103556A EP94103556A EP0624697A1 EP 0624697 A1 EP0624697 A1 EP 0624697A1 EP 94103556 A EP94103556 A EP 94103556A EP 94103556 A EP94103556 A EP 94103556A EP 0624697 A1 EP0624697 A1 EP 0624697A1
Authority
EP
European Patent Office
Prior art keywords
prestressed concrete
concrete sleepers
anchoring
grouted
steel reinforcement
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP94103556A
Other languages
German (de)
French (fr)
Other versions
EP0624697B1 (en
Inventor
Frithjof Dipl.-Ing. Schimpff
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.)
Pfleiderer Infrastrukturtechnick GmbH and Co KG
Original Assignee
Wayss and Freytag 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 Wayss and Freytag AG filed Critical Wayss and Freytag AG
Publication of EP0624697A1 publication Critical patent/EP0624697A1/en
Application granted granted Critical
Publication of EP0624697B1 publication Critical patent/EP0624697B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
    • B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
    • B28B23/04—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members the elements being stressed
    • B28B23/046—Post treatment to obtain pre-stressed articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
    • B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
    • B28B23/04—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members the elements being stressed
    • B28B23/06—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members the elements being stressed for the production of elongated articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/28—Cores; Mandrels
    • B28B7/30—Cores; Mandrels adjustable, collapsible, or expanding
    • B28B7/303—Cores; Mandrels adjustable, collapsible, or expanding specially for making undercut recesses or continuous cavities the inner section of which is superior to the section of either of the mouths
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B3/00—Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails
    • E01B3/28—Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails made from concrete or from natural or artificial stone
    • E01B3/32—Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails made from concrete or from natural or artificial stone with armouring or reinforcement
    • E01B3/34—Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails made from concrete or from natural or artificial stone with armouring or reinforcement with pre-tensioned armouring or reinforcement
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/20—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members
    • E04C3/26—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members prestressed
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/02—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance
    • E04C5/03—Reinforcing elements of metal, e.g. with non-structural coatings of low bending resistance with indentations, projections, ribs, or the like, for augmenting the adherence to the concrete
    • 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

Definitions

  • the invention relates to prestressing reinforcement as described in the preamble of claim 1.
  • the sleepers are reinforced with two crosswise laid hairpin-shaped tension rods for economic and manufacturing reasons. This eliminates the need for complex anchoring structures at one end of the prefabricated part. There they will be replaced by the stick arch.
  • the tie rods - because of the small cross section of the sleepers - must be bent with a very small bending radius.
  • the small bending radius limits the number of prestressing steels that can be used.
  • Tempered rolled ribbed prestressing steels were not suitable for hairpin-shaped reinforcement with a small bending radius.
  • the object of the invention is to find suitable hairpin-shaped bendable reinforcing bars with which sufficient adhesion can be achieved.
  • the object is achieved by using profiled tensioning rods known per se, ie cold-drawn tensioning rods which are provided with trough-shaped depressions in the lateral surface by a subsequent rolling pass.
  • profiled tie rods have so far only been produced with a cross-section that is too small for simple four-bar reinforcement.
  • profiled prestressing bars With cross sections with diameters> 8 mm, the production of prestressed concrete sleepers with a subsequent bond was made possible using profiled prestressing bars.
  • FIGS. 1 and 2 show a threshold in longitudinal section (Fig.1) and cross section (Fig.2) with cross-shaped hairpin-shaped reinforcing bars.
  • a prestressed concrete sleeper 1 is provided with the help of suitable shaped rods inserted in the formwork with the concrete 2 penetrating prestressing channels 3, into the hairpin-shaped prestressing rods 4 made of profiled prestressing steel after the concrete has hardened and then tensioned.
  • the clamping channels are then grouted with a suitable grout.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Rod-Shaped Construction Members (AREA)

Abstract

In order to avoid permanent cracks in the case of prestressed-concrete sleepers with post-tensioning which are subjected to high loading, it is proposed to use as stressing reinforcement, in place of the hitherto-used smooth hairpin-shaped stressing bars, those of profiled cold-drawn steel. <IMAGE>

Description

Die Erfindung betrifft eine Spannbewehrung, wie sie im Oberbegriff des Anspruchs 1 beschrieben ist.
Zur Vorspannung von Spannbetonschwellen mit nachträglichem Verbund werden die Schwellen aus wirtschaftlichen und herstellungstechnischen Gründen mit zwei kreuzweise verlegten haarnadelförmig gebogenen Spannstäben armiert. Damit fallen aufwendige Verankerungskonstruktionen an einem Ende des Fertigteils weg. Sie werden dort durch den Stabbogen ersetzt.The invention relates to prestressing reinforcement as described in the preamble of claim 1.
For pre-tensioning prestressed concrete sleepers with a subsequent bond, the sleepers are reinforced with two crosswise laid hairpin-shaped tension rods for economic and manufacturing reasons. This eliminates the need for complex anchoring structures at one end of the prefabricated part. There they will be replaced by the stick arch.

Will man derartige haarnadelförmig gebogene Spannstäbe in Spannbetonschwellen verwenden, so müssen die Spannstäbe - wegen des geringen Querschnitts der Schwellen - mit einem sehr kleinen Biegeradius gebogen werden. Der kleine Biegeradius schränkt die Zahl der verwendbaren Spannstähle ein.If you want to use such hairpin-shaped curved tie rods in prestressed concrete sleepers, the tie rods - because of the small cross section of the sleepers - must be bent with a very small bending radius. The small bending radius limits the number of prestressing steels that can be used.

Bisher waren nur glatte Spannstähle bekannt, die um den erforderlichen kleinen Biegeradius biegbar waren. Vergütete gewalzte gerippte Spannstähle eigneten sich für haarnadelförmige Bewehrung mit kleinem Biegeradius nicht.Until now, only smooth prestressing steels were known that could be bent by the required small bending radius. Tempered rolled ribbed prestressing steels were not suitable for hairpin-shaped reinforcement with a small bending radius.

Sie geben die Umlenk- und Verankerungskräfte im wesentlichen punktweise über die Hochpunkte des Profils auf die Laibungsfläche des Betons ab und zerstören dabei den Beton. Außerdem besteht bei dem über Rollen mit zu kleinen Biegedurchmesser gebogenen Spannstab Sprödbruchgefahr, die die Tragfähigkeit des Fertigteils gefährdet.They release the deflection and anchoring forces essentially point by point over the high points of the profile onto the reveal surface of the concrete and thereby destroy the concrete. In addition, there is a risk of brittle fracture with the tension rod, which is bent over rollers with a bending diameter that is too small, which jeopardizes the load-bearing capacity of the finished part.

Bei durch Dauerschwingbeanspruchung hoch belasteten, mit Vorspannung mit nachträglichem Verbund hergestellten Eisenbahnschwellen, die besonders hohe Betonfestigkeiten von über 60 N/mm² aufweisen, können im Bereich der großen Zugspannungen Risse im Beton entstehen, die sich bei Entlastung nicht wieder vollständig schließen. Diese bleibenden Risse können zu dauernden Schäden und zur Zerstörung der Fertigteile führen (z.B. bei Schwellen, indem bei weiteren Lastwechseln von unten Partikel in den Riß einwandern und die Rißbreite fortschreitend vergrößern).In the case of railway sleepers that are subjected to high stress due to permanent vibration and are pre-stressed with a subsequent bond and that have particularly high concrete strengths of over 60 N / mm², cracks can occur in the concrete in the area of high tensile stresses that do not close completely when relieved. These permanent cracks can lead to permanent damage and destruction of the finished parts (e.g. in sleepers, in that particles continue to enter the crack and further increase the width of the crack as the load changes from below).

Eingehende Untersuchungen der Anmelderin haben ergeben, daß die obengenannten Schäden durch eine verbesserte Haftung zwischen Beton und den Spannstäben beseitigt werden können. Diese verbesserte Haftung ist mit den üblich verwendeten glatten Spannstäben nicht erreichbar.In-depth investigations by the applicant have shown that the above-mentioned damage can be eliminated by improved adhesion between the concrete and the tension rods. This improved adhesion cannot be achieved with the commonly used smooth tension rods.

Aufgabe der Erfindung ist es, geeignete haarnadelförmig biegbare Bewehrungsstäbe zu finden, mit denen eine ausreichende Haftung erreichbar ist.
Die Aufgabe wird gelöst durch Verwendung an sich bekannter profilierter Spannstäbe, d.h. kaltgezogener Spannstäbe, die durch einen nachgeschalteten Walzgang in der Mantelfläche mit muldenförmigen Vertiefungen versehen sind.The object of the invention is to find suitable hairpin-shaped bendable reinforcing bars with which sufficient adhesion can be achieved.
The object is achieved by using profiled tensioning rods known per se, ie cold-drawn tensioning rods which are provided with trough-shaped depressions in the lateral surface by a subsequent rolling pass.

Profilierte Spannstäbe wurden aus herstellungstechnischen Gründen bislang nur mit einem für eine einfache vierstäbige Bewehrung zu kleinen Querschnitt hergestellt. Durch Initiierung einer Fertigung von profilierten Spannstäben mit Querschnitten mit Durchmessern > 8 mm wurde die Produktion von Spannbetonschwellen mit nachträglichem Verbund, unter Verwendung von profilierten Spannstäben ermöglicht.For technical reasons, profiled tie rods have so far only been produced with a cross-section that is too small for simple four-bar reinforcement. By initiating the production of profiled prestressing bars with cross sections with diameters> 8 mm, the production of prestressed concrete sleepers with a subsequent bond was made possible using profiled prestressing bars.

Die Erfindung wird durch die Figur 1 und 2 erläutert.
Figur 1 und 2 zeigen eine Schwelle im Längsschnitt (Fig.1) und Querschnitt (Fig.2) mit kreuzförmig verlegten haarnadelförmigen Bewehrungsstäben.The invention is illustrated by FIGS. 1 and 2.
Figures 1 and 2 show a threshold in longitudinal section (Fig.1) and cross section (Fig.2) with cross-shaped hairpin-shaped reinforcing bars.

Eine Spannbetonschwelle 1 wird mit Hilfe in der Schalung eingelegter geeigneter Formstäbe mit den Beton 2 durchsetzenden Spannkanälen 3 versehen, in die haarnadelförmige Spannstäbe 4 aus profilierten Spannstahl nach Erhärtung des Betons eingezogen und anschließend gespannt werden. Anschließend werden die Spannkanäle mit geeignetem Verpreßmörtel verpreßt.A prestressed concrete sleeper 1 is provided with the help of suitable shaped rods inserted in the formwork with the concrete 2 penetrating prestressing channels 3, into the hairpin-shaped prestressing rods 4 made of profiled prestressing steel after the concrete has hardened and then tensioned. The clamping channels are then grouted with a suitable grout.

Claims (1)

Spannstahlbewehrung in Spannbetonschwellen mit Vorspannung mit nachträglichem Verbund, die aus mindestens einem haarnadelförmigen Spannstab besteht, der nach Erhärtung des Betons in vorgefertigte Kanäle eingeführt und gespannt wird, dadurch gekennzeichnet, daß profilierter kaltgezogener Stahl verwendet wird.Prestressing steel reinforcement in prestressed concrete sleepers with prestressing with subsequent composite, which consists of at least one hairpin-shaped prestressing bar, which is inserted and pre-tensioned in pre-fabricated channels after hardening of the concrete, characterized in that profiled cold-drawn steel is used.
EP94103556A 1993-05-08 1994-03-09 Stressed steel reinforcement for prestressed concrete sleepers with grouted anchoring Expired - Lifetime EP0624697B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4315402 1993-05-08
DE4315402 1993-05-08

Publications (2)

Publication Number Publication Date
EP0624697A1 true EP0624697A1 (en) 1994-11-17
EP0624697B1 EP0624697B1 (en) 2000-07-19

Family

ID=6487606

Family Applications (2)

Application Number Title Priority Date Filing Date
EP93113953A Withdrawn EP0625414A1 (en) 1993-05-08 1993-09-01 Process for increasing the adhesion in prestressed concrete sleepers or similar products of improved fatigue strength with grouted anchoring and forming apparatus for carrying out the process
EP94103556A Expired - Lifetime EP0624697B1 (en) 1993-05-08 1994-03-09 Stressed steel reinforcement for prestressed concrete sleepers with grouted anchoring

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP93113953A Withdrawn EP0625414A1 (en) 1993-05-08 1993-09-01 Process for increasing the adhesion in prestressed concrete sleepers or similar products of improved fatigue strength with grouted anchoring and forming apparatus for carrying out the process

Country Status (5)

Country Link
EP (2) EP0625414A1 (en)
AT (1) ATE194862T1 (en)
DE (1) DE59409453D1 (en)
ES (2) ES1026242Y (en)
PT (1) PT624697E (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2251485A2 (en) * 2009-05-07 2010-11-17 RAIL.ONE GmbH Reinforced concrete sleeper and method for its production
CN107858873A (en) * 2017-10-31 2018-03-30 天津银龙预应力材料股份有限公司 A kind of durable type railroad sleeper

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MX2014008112A (en) 2014-07-01 2016-01-01 Bienracon S De Rl De Cv Ultra resistant monolithic railroad ties made of reinforced concrete in an integral manner with optimum geometry for track balast in reailroads.
DE202018106169U1 (en) 2018-09-20 2018-11-08 Leonhard Moll Betonwerke Gmbh & Co Kg Device for stabilizing the front sides of precast concrete elements

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE479679A (en) *
DE1035606B (en) * 1957-04-20 1958-08-07 Baustahlgewebe Gmbh Process for the manufacture of reinforcing steel with transversely grooved parts of its circumference
DE1058909B (en) * 1957-11-19 1959-06-04 Werner Karig Dr Ing Device for making railway sleepers from prestressed concrete
DE1084464B (en) * 1953-09-03 1960-06-30 Moossche Eisenwerke Ag Reinforcing wire or rod, especially for prestressed concrete, as well as method and device for its production
US3494164A (en) * 1967-01-03 1970-02-10 Baustahlgewebe Gmbh Process for producing a reinforcing rod for concrete
JPS6076216A (en) * 1983-10-04 1985-04-30 Naniwa Seitei Kk Manufacture of metallic bar-material having plastically worked spiral groove on its periphery

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE445943A (en) *
US2535100A (en) * 1949-01-17 1950-12-26 James A Sourwine Process for prestressing cement products
GB682320A (en) * 1949-02-07 1952-11-05 Armand Blaton Method of forming passages in concrete beams or the like
DE880645C (en) * 1951-07-12 1953-06-22 Wayss & Freytag A G Method for producing channels in concrete, in particular channels for tendons
NL265616A (en) * 1960-06-21
AT279124B (en) * 1968-05-07 1970-02-25 Holzmann Philipp Ag Process and duct for the production of prestressed concrete components
DE2717869B2 (en) * 1977-04-22 1979-05-31 Dyckerhoff & Widmann Ag, 8000 Muenchen Method for stiffening a thin-walled duct and for threading a tendon into the duct
EP0198398B1 (en) * 1985-04-08 1990-08-01 Sumitomo Electric Industries Limited Prestressing steel material
US4726163A (en) * 1985-06-10 1988-02-23 Jacobs William A Prestressed plastic bodies and method of making same

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE479679A (en) *
DE1084464B (en) * 1953-09-03 1960-06-30 Moossche Eisenwerke Ag Reinforcing wire or rod, especially for prestressed concrete, as well as method and device for its production
DE1035606B (en) * 1957-04-20 1958-08-07 Baustahlgewebe Gmbh Process for the manufacture of reinforcing steel with transversely grooved parts of its circumference
DE1058909B (en) * 1957-11-19 1959-06-04 Werner Karig Dr Ing Device for making railway sleepers from prestressed concrete
US3494164A (en) * 1967-01-03 1970-02-10 Baustahlgewebe Gmbh Process for producing a reinforcing rod for concrete
JPS6076216A (en) * 1983-10-04 1985-04-30 Naniwa Seitei Kk Manufacture of metallic bar-material having plastically worked spiral groove on its periphery

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 9, no. 215 (M - 409) 3 September 1985 (1985-09-03) *
SOVIET INVENTIONS ILLUSTRATED Derwent World Patents Index; AN 177062 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2251485A2 (en) * 2009-05-07 2010-11-17 RAIL.ONE GmbH Reinforced concrete sleeper and method for its production
EP2251485A3 (en) * 2009-05-07 2013-12-04 RAIL.ONE GmbH Reinforced concrete sleeper and method for its production
CN107858873A (en) * 2017-10-31 2018-03-30 天津银龙预应力材料股份有限公司 A kind of durable type railroad sleeper

Also Published As

Publication number Publication date
ES2112216T3 (en) 2000-11-01
DE59409453D1 (en) 2000-08-24
ATE194862T1 (en) 2000-08-15
ES1026242Y (en) 1994-09-01
ES1026242U (en) 1994-04-01
EP0625414A1 (en) 1994-11-23
PT624697E (en) 2000-12-29
ES2112216T1 (en) 1998-04-01
EP0624697B1 (en) 2000-07-19

Similar Documents

Publication Publication Date Title
DE3437107C2 (en)
EP2143843A2 (en) Steel-concrete composite trough as bridgedeck and method for its production
CH284298A (en) Process for the production of bodies provided with steel reinforcement and bodies produced by the process.
DE2944878A1 (en) Concrete reinforcing rod or wire corrosion protection - involves tight full length metal sheath form locked round it
EP0621381A1 (en) Prestressed reinforcement element
EP0624697B1 (en) Stressed steel reinforcement for prestressed concrete sleepers with grouted anchoring
DE69123517T2 (en) Process for the production of a sheet steel concrete ceiling
DE3339058A1 (en) Exposed tightenable tension member comprising one or more tension elements, such as steel rods, wires or strands
DE19708896A1 (en) Railway permanent way
DE2734757A1 (en) Prestressed concrete beam mfr. - uses threaded steel bars inserted into sheaths joined to screwed sleeves to reduce prestress at supports
DE2923370A1 (en) Reinforced concrete vault structure - has shell on prefab arched pieces prestressed in bend line direction
DE2911239A1 (en) Cyclic process for forwarded bridge type concrete structure - uses prefabricated parts monolithically built onto cross=section core, with joints filled by casting
DE1140594B (en) Road surface made of concrete or other hardenable compounds.
DE2504122A1 (en) Reinforced concrete constructional beam - has concrete around tensioned steel rods locally reinforced by fibres
DE2703822A1 (en) Rhythmic staged prestressed concrete bridge forwarding - using stress members periodically providing eccentric stresses for alternating moment absorption
DE975466C (en) Prestressed component and process for its manufacture
DE2936836C2 (en)
EP0826848B1 (en) Device for the concentrated introduction of forces into concrete
DE19825526A1 (en) Rail member, esp. a prefabricated rail section
DE928291C (en) Prestressed concrete railway sleeper
DE2502939C2 (en) Method for manufacturing a plate spring joint provided with prestressed reinforcement
DE10134777B4 (en) Building and process for its production
DE826305C (en) Concrete railway sleeper
DE959495C (en) Method and device for producing a roof or hall structure in composite construction
AT164332B (en) Method for reinforcing existing reinforced concrete structures

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): AT CH DE ES FR IT LI PT

17P Request for examination filed

Effective date: 19941125

17Q First examination report despatched

Effective date: 19970924

REG Reference to a national code

Ref country code: ES

Ref legal event code: BA2A

Ref document number: 2112216

Country of ref document: ES

Kind code of ref document: T1

ITCL It: translation for ep claims filed

Representative=s name: LENZI & C.

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

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: PFLEIDERER INFRASTRUKTURTECHNIK GMBH & CO. KG

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT CH DE ES FR IT LI PT

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

Ref country code: FR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20000719

REF Corresponds to:

Ref document number: 194862

Country of ref document: AT

Date of ref document: 20000815

Kind code of ref document: T

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 59409453

Country of ref document: DE

Date of ref document: 20000824

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: ISLER & PEDRAZZINI AG

ITF It: translation for a ep patent filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2112216

Country of ref document: ES

Kind code of ref document: T3

EN Fr: translation not filed
REG Reference to a national code

Ref country code: PT

Ref legal event code: SC4A

Free format text: AVAILABILITY OF NATIONAL TRANSLATION

Effective date: 20000901

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

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050309

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

Ref country code: PT

Payment date: 20060301

Year of fee payment: 13

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

Ref country code: AT

Payment date: 20060321

Year of fee payment: 13

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

Ref country code: ES

Payment date: 20060322

Year of fee payment: 13

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

Ref country code: CH

Payment date: 20060323

Year of fee payment: 13

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

Ref country code: DE

Payment date: 20060327

Year of fee payment: 13

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

Ref country code: PT

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

Effective date: 20070910

REG Reference to a national code

Ref country code: PT

Ref legal event code: MM4A

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

Effective date: 20070910

REG Reference to a national code

Ref country code: CH

Ref legal event code: PCAR

Free format text: ISLER & PEDRAZZINI AG;POSTFACH 1772;8027 ZUERICH (CH)

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

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

Ref country code: AT

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

Effective date: 20070309

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: 20071002

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

Ref country code: LI

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

Effective date: 20070331

Ref country code: CH

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

Effective date: 20070331

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20070310

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

Ref country code: ES

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

Effective date: 20070310

PGRI Patent reinstated in contracting state [announced from national office to epo]

Ref country code: IT

Effective date: 20091001

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

Ref country code: IT

Payment date: 20060331

Year of fee payment: 13

PGRI Patent reinstated in contracting state [announced from national office to epo]

Ref country code: IT

Effective date: 20091001