EP0340331A1 - Procédé pour la fabrication d'éléments identiques de forme allongée sur un banc de précontrainte - Google Patents

Procédé pour la fabrication d'éléments identiques de forme allongée sur un banc de précontrainte Download PDF

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Publication number
EP0340331A1
EP0340331A1 EP88107440A EP88107440A EP0340331A1 EP 0340331 A1 EP0340331 A1 EP 0340331A1 EP 88107440 A EP88107440 A EP 88107440A EP 88107440 A EP88107440 A EP 88107440A EP 0340331 A1 EP0340331 A1 EP 0340331A1
Authority
EP
European Patent Office
Prior art keywords
bed
formwork
concrete
abutment
prestressed
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.)
Withdrawn
Application number
EP88107440A
Other languages
German (de)
English (en)
Inventor
Rolf Dipl.-Ing. Knodel
Friedrich Ing.Grad. Niehoff
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.)
Wayss and Freytag AG
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
Priority to EP88107440A priority Critical patent/EP0340331A1/fr
Priority to DK309488A priority patent/DK309488A/da
Priority to NO88882721A priority patent/NO882721L/no
Priority to FI892075A priority patent/FI892075A7/fi
Publication of EP0340331A1 publication Critical patent/EP0340331A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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

Definitions

  • the invention relates to a process for the production of long prefabricated parts in the fitted bed, as described generically in the characterizing part of claim 1, and means for carrying out the method.
  • Preloaded long finished parts with a constant cross-section are preferably manufactured one after the other in long clamping beds. They are connected to one another during production with the full cross-section or at least with the tendons spanned from abutment to abutment and are separated from one another by separating cuts after the concrete has hardened.
  • the real hardening process lies between the two borderline cases.
  • the prestressing loss in the end sections of the tendons is between 4 and 100%, in the practical case of the example around 25%.
  • the 25% loss of tension acts as a prestress on the end faces of the two finished parts in the end position and must be absorbed by the concrete at an early stage of hardening. This prestress is large enough to exceed the adhesive strength to the tendon and the splitting tensile strength in the entry area of the force in the young concrete and to cause damage in the end anchoring sections of the tendon.
  • the object of the invention is to avoid damage to finished parts arranged in the end position when producing finished parts in the fitted bed.
  • the object is achieved by a method as described in the characterizing part of claim 1.
  • Claim 2 specifies an abutment element for carrying out the method according to the invention, which fulfills the requirements of claim 1 for concrete with normal hardening behavior.
  • a device for the production of long pre-stressed prefabricated parts 2/1, 2/2 ... 2 / n - for example turnout sleepers the prefabricated parts 2 in a formwork 1 between abutments 3, against which tendons 4 are anchored and prestressed, one behind the other poured.
  • the abutment elements 7, 8 according to the invention are arranged in the end regions 5, 6 of the formwork 1.
  • the individual finished parts 2/1, 2/2 ... 2 / n manufactured one after the other in a fitted bed are limited by the head scales 10 of the separating devices 9 forming the finished parts 2.
  • the length of the abutment element 8 is determined by the friction between the formwork and the abutment element.
  • the abutment element 7 has a device 11 which increases the friction. It consists of two parts 12, 13, of which part 12 is firmly connected to the side wall of the formwork 1 and tapers upwards in a wedge shape, while part 13 has at least the thickness of part 12 - in the example it has a greater thickness and encompasses part 12 from three sides - the part 12 downwards accordingly opens overlapping and has means 14 with which it can be pulled up out of the formwork 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
EP88107440A 1988-05-02 1988-05-02 Procédé pour la fabrication d'éléments identiques de forme allongée sur un banc de précontrainte Withdrawn EP0340331A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP88107440A EP0340331A1 (fr) 1988-05-02 1988-05-02 Procédé pour la fabrication d'éléments identiques de forme allongée sur un banc de précontrainte
DK309488A DK309488A (da) 1988-05-02 1988-06-07 Fremgangsmaade til fremstilling af lange spaendbetonelementer
NO88882721A NO882721L (no) 1988-05-02 1988-06-20 Fremgangsmaate til fremstilling av lange ferdigelementer ispennform.
FI892075A FI892075A7 (fi) 1988-05-02 1989-05-02 Foerfarande foer framstaellning av laonga faerdigdelar av roer pao foerspaenningsunderlag.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP88107440A EP0340331A1 (fr) 1988-05-02 1988-05-02 Procédé pour la fabrication d'éléments identiques de forme allongée sur un banc de précontrainte

Publications (1)

Publication Number Publication Date
EP0340331A1 true EP0340331A1 (fr) 1989-11-08

Family

ID=8198961

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88107440A Withdrawn EP0340331A1 (fr) 1988-05-02 1988-05-02 Procédé pour la fabrication d'éléments identiques de forme allongée sur un banc de précontrainte

Country Status (4)

Country Link
EP (1) EP0340331A1 (fr)
DK (1) DK309488A (fr)
FI (1) FI892075A7 (fr)
NO (1) NO882721L (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008089719A1 (fr) * 2007-01-22 2008-07-31 Rail.One Gmbh Procédé de fabrication de traverses d'aiguille et traverse d'aiguille fabriquée selon ce procédé
CN102069151A (zh) * 2010-12-24 2011-05-25 中铁宝桥集团有限公司 一种预埋套管式板槽组合结构无碴道岔板模具

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE455839A (fr) *
SU175417A1 (ru) * Государственный Проектный Институт ГИПРОПРОМТРАНССТРОЙ77";;;;и^Г""! Бй5Л!;с')?;;л
GB886819A (en) * 1959-12-03 1962-01-10 Stanton Ironworks Co Ltd Improvements in and relating to the production of prestressed concrete sleepers and like bodies
US3819794A (en) * 1972-05-15 1974-06-25 Z Kidron Method for making prestressed precast concrete elements

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE455839A (fr) *
SU175417A1 (ru) * Государственный Проектный Институт ГИПРОПРОМТРАНССТРОЙ77";;;;и^Г""! Бй5Л!;с')?;;л
GB886819A (en) * 1959-12-03 1962-01-10 Stanton Ironworks Co Ltd Improvements in and relating to the production of prestressed concrete sleepers and like bodies
US3819794A (en) * 1972-05-15 1974-06-25 Z Kidron Method for making prestressed precast concrete elements

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SOVIET INVENTIONS ILLUSTRATED, Klasse 80a, Derwent Publications, Ltd, London, GB; & SU-A-175 417 (GOSUDARSTVENNYI PROEKTNYI INSTITUT GIPROPROMTRANSSTROI) 21-09-1965 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008089719A1 (fr) * 2007-01-22 2008-07-31 Rail.One Gmbh Procédé de fabrication de traverses d'aiguille et traverse d'aiguille fabriquée selon ce procédé
CN102069151A (zh) * 2010-12-24 2011-05-25 中铁宝桥集团有限公司 一种预埋套管式板槽组合结构无碴道岔板模具
CN102069151B (zh) * 2010-12-24 2013-03-27 中铁宝桥集团有限公司 一种预埋套管式板槽组合结构无碴道岔板模具

Also Published As

Publication number Publication date
NO882721L (no) 1989-11-03
FI892075A0 (fi) 1989-05-02
DK309488D0 (da) 1988-06-07
NO882721D0 (no) 1988-06-20
DK309488A (da) 1989-11-03
FI892075A7 (fi) 1989-11-03

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