DE838421C - Method and form for the manufacture of concrete sleepers with prestressed reinforcement - Google Patents

Method and form for the manufacture of concrete sleepers with prestressed reinforcement

Info

Publication number
DE838421C
DE838421C DEP3881A DEP0003881A DE838421C DE 838421 C DE838421 C DE 838421C DE P3881 A DEP3881 A DE P3881A DE P0003881 A DEP0003881 A DE P0003881A DE 838421 C DE838421 C DE 838421C
Authority
DE
Germany
Prior art keywords
concrete
tensioned
wires
bolts
manufacture
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
Application number
DEP3881A
Other languages
German (de)
Inventor
Wilhelm Haug
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.)
HeidelbergCement AG
Original Assignee
Portland Zementwerke Heidelberg 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 Portland Zementwerke Heidelberg AG filed Critical Portland Zementwerke Heidelberg AG
Priority to DEP3881A priority Critical patent/DE838421C/en
Application granted granted Critical
Publication of DE838421C publication Critical patent/DE838421C/en
Expired legal-status Critical Current

Links

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
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)

Description

Die Erfindung bezieht sich auf die Herstellung von Betonschwellen oder -trägern in Spannbeton, bei dem die in Form von dünnen Stahldrähten gehaltenen Bewehrungseinlagen unter hoher Vorspannung in der Form liegen und nach dem Einbringen und. vollständigen Erhärten des Betons zum Einleiten von Druckspannungen in den Beton entspannt werden. Sie betrifft ein neues Verfahren zur Einlagerung von gespannten Bewehrungsdrähten, die zur Aufnahme von Schuhspannungen von der oberen Zone schräg zur unteren Zone laufen. Hierzu werden erfindungsgemäß diese Drähte über die Form durchsetzende Bolzen mit losen Führungsrollen gespannt, worauf nach dem Erhärten des Betons die Bolzen zur Einleitung der Spannung in den Beton entfernt werden. Diese schräg gespannten Drähte ` erhalten hierbei die gleiche Spannung wie die sonstigen Bewe,hrungseinlagen. Die Führungsrollen verbleiben in dem Beton und die Bolzenlöcher werden mit Beton ausgegossen. Durch entsprechende Anordnung der Führungsbolzen können somit beliebig verlaufende Spanndrähte in den Beton eingebettet «-erden, wobei die Rollenringe, deren Innendurchmesser etwas größer ist als der Bolzendurchrnesser, den Spannvorgang erleichtern.The invention relates to the manufacture of concrete sleepers or beams in prestressed concrete, in which the held in the form of thin steel wires Reinforcement inserts lie in the mold under high prestress and after insertion and. complete hardening of the concrete to introduce compressive stresses into the Concrete to be relaxed. It concerns a new procedure for the storage of tensioned Reinforcing wires used to absorb shoe stresses from the upper zone at an angle run to the lower zone. For this purpose, according to the invention, these wires are over the shape penetrating bolts tensioned with loose guide rollers, whereupon after hardening of the concrete, the bolts for introducing the tension into the concrete are removed. These wires, which are tensioned at an angle, are given the same tension as the others Evidence. The guide rollers remain in the concrete and the bolt holes are poured with concrete. By arranging the guide pins accordingly, you can tension wires that run in any way are embedded in the concrete «-erden, whereby the Roller rings, the inside diameter of which is slightly larger than the bolt diameter, facilitate the clamping process.

Das neue Verfahren ist nachstehend an Hand der Zeichnung näher erläutert. Diese zeigt in Abb. i die fertige Betonschwelle in Seitenansicht und in Abb. 2 eine Draufsicht auf die Form.The new method is explained in more detail below with reference to the drawing. This shows in Fig. I the finished concrete sleeper in side view and in Fig. 2 a Top view of the shape.

Die Form i ist an den Seitenflächen entsprechend dem gewünschten Verlauf der schräg zu spannenden Drähte 2 mit Löchern versehen, durch die Bolzen 3 hindurchgesteckt sind. Auf die Bolzen 3 sind Führungsringe 4 aufgeschoben, um die die Spanndrähte 2 herumgeführt sind. Nach dem Erhärten des in die Form i eingebrachten Betons und dem Abschneiden der Spannenden der Drahteinlagen werden die Bolzen 3 aus der Form herausgezogen und die Schwelle wird aus der Form gehoben. Die in der Schwelle sich ergebenden Bolzenlöcher werden alsdann mit Beton vergossen.The shape i is on the side surfaces according to the desired course the wires 2 to be clamped at an angle are provided with holes, pushed through the bolts 3 are. Guide rings 4 are pushed onto the bolts 3, around which the tension wires 2 are shown around. After the concrete poured into the mold i and has hardened after cutting off the tensioning ends of the wire inserts, the bolts 3 are out of shape pulled out and the threshold is lifted out of the mold. The one on the threshold The resulting bolt holes are then cast with concrete.

Claims (4)

PATENTANSPRÜCHE: r. Verfahren zum Herstellen von Betonbalken oder -schwellen in Spannbeton mit zur Aufnahme von Schubspannungen schräg gespannten Bewehrungsdrähten, dadurch gekennzeichnet, daß die schräg zu spannenden Drähte über in der Form vorgesehene Bolzen gespannt und die Bolzen nach dem Erhärten des Betons entfernt werden. PATENT CLAIMS: r. Process for the production of concrete beams or sleepers in prestressed concrete with reinforcing wires tensioned at an angle to absorb shear stresses, characterized in that the wires to be tensioned at an angle are tensioned over bolts provided in the mold and the bolts are removed after the concrete has hardened. 2. Verfahren nach Anspruch i, dadurch gekennzeichnet, daß die schräg gespannten Drähte die gleiche Spannung erhalten wie die sonstigen Bewehrungseinlagen. 2. The method according to claim i, characterized in that the obliquely tensioned wires receive the same tension as the other reinforcement inserts. 3. Verfahren nach Anspruch i, dadurch gekennzeichnet, daß die Bolzenlöcher in dem fertigen Betonkörper ausgegossen werden. 3. The method according to claim i, characterized in that the bolt holes in the finished concrete body to be poured. 4. Form zur Durchführung des Verfahrens nach Anspruch i, dadurch gekennzeichnet, daß in Löchern der Seitenwände die Form quer durchsetzende Bolzen herausziehbar angeordnet und die Bolzen mit lose aufgesteckten Führungsringen für die zu spannenden Drähte versehen sind.4. Form for carrying out the procedure according to claim i, characterized in that the form in holes in the side walls transversely penetrating bolts are arranged so that they can be pulled out and the bolts are loosely attached Guide rings are provided for the wires to be tensioned.
DEP3881A 1942-05-01 1942-05-01 Method and form for the manufacture of concrete sleepers with prestressed reinforcement Expired DE838421C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEP3881A DE838421C (en) 1942-05-01 1942-05-01 Method and form for the manufacture of concrete sleepers with prestressed reinforcement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP3881A DE838421C (en) 1942-05-01 1942-05-01 Method and form for the manufacture of concrete sleepers with prestressed reinforcement

Publications (1)

Publication Number Publication Date
DE838421C true DE838421C (en) 1952-05-08

Family

ID=7359108

Family Applications (1)

Application Number Title Priority Date Filing Date
DEP3881A Expired DE838421C (en) 1942-05-01 1942-05-01 Method and form for the manufacture of concrete sleepers with prestressed reinforcement

Country Status (1)

Country Link
DE (1) DE838421C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3237912A (en) * 1960-06-23 1966-03-01 Carl H Hutchings Mold bed for stressed concrete structural members

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3237912A (en) * 1960-06-23 1966-03-01 Carl H Hutchings Mold bed for stressed concrete structural members

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