DE940608C - Press for applying tensile forces to the tendons in the manufacture of prestressed concrete - Google Patents
Press for applying tensile forces to the tendons in the manufacture of prestressed concreteInfo
- Publication number
- DE940608C DE940608C DEB28510A DEB0028510A DE940608C DE 940608 C DE940608 C DE 940608C DE B28510 A DEB28510 A DE B28510A DE B0028510 A DEB0028510 A DE B0028510A DE 940608 C DE940608 C DE 940608C
- Authority
- DE
- Germany
- Prior art keywords
- press
- tendons
- prestressed concrete
- tensile forces
- 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
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
- E04G21/121—Construction of stressing jacks
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
Description
Die Erfindung bezieht sich -auf eine Presse, die beim Eintragen der Vorspannkräfte; insbesondere in die als Bewehrungen von Spannbeton dienenden Stäbe, Verwendung findet.The invention relates to a press that when entering the Preload forces; especially in the bars used as reinforcement of prestressed concrete, Is used.
Hydraulisch betriebene Pressen dieser Art wurden--bisher in :Achsrichtung über das an der Verankerungsstelle nur kurz aus dem Ankerkörper herausragende Stabende gesteckt. Zu diesem Zweck war die Presse mit einer axial im Pressenkörper verlaufenden Einführungsbohrung rausgestattet.Hydraulically operated presses of this type were - previously in: axial direction via the rod end protruding only briefly from the anchor body at the anchorage point plugged. For this purpose the press was equipped with an axially extending one in the press body Insertion hole outfitted.
Die Erfindung sieht demgegenüber vor, die Presse mit zwei symmetrisch sitzenden Zylindern auszurüsten, die so miteinander verbunden ' sind, daß die Presse an beliebiger Stelle auf beliebig lange Stäbe aufgesetzt werden kann..The invention provides, on the other hand, the press with two symmetrical to equip seated cylinders, which are so interconnected that the press can be placed anywhere on rods of any length ..
Mit Hilfe einer erfindungsgemäß ausgebildeten Presse ist es erstmalig möglich,- ein beliebig langes Spannglied in Teilabschnitten unter' Spannung zu setzen. Man kann also beispielsweise eine mehrere hundert Meter lange Beton-Fahrbahnplatte in- der Weise vorspannen, daß man entsprechend lange Vorspannstäbe auslegt und zunächst nur einen beliebig kurzen Fahrbahnabschnittbetoniert, Am Ende dieses ersten Bauabschnittes wird eine zuvor eingefädelte Ankerplatte od. dgl. einbetoniert, in die nach. dem Erhärten des Betons geeignete Verankerungsglieder eingebracht werden. Zum Eintragen der Vorspannkräfte kann dann die Presse an dieser Stelle auf das Spannglied @äufgi#§eti@ werden. Dieser Vorgang wiederholt siel@..von-:Bauabschnitt zu Bauabschnitt an allen eingelegten Stäben. Die Zeichnung zeigt schematisch ein Ausführungsbeispiel einer Presse gemäß der Erfindung.It is the first time with the aid of a press designed according to the invention possible, - to put a tendon of any length under tension in sections. For example, you can use a concrete deck several hundred meters long Pretension in such a way that appropriately long pretensioning rods are laid out and first Concreted only an arbitrarily short section of the roadway at the end of this first construction phase a previously threaded anchor plate or the like is concreted into the after. to the If the concrete hardens, suitable anchoring links are inserted. To register the prestressing forces can then be applied to the tendon @ äufgi # §eti @ at this point will. This process is repeated siel @ .. from-: construction section to construction section at all inlaid bars. The drawing shows schematically an embodiment of a Press according to the invention.
Fig. i ist ein Längsschnitt durch die Presse mit angedeutetem Spannstab, Fig. 2 ein Querschnitt durch die Presse nach der Linie II-II der Fig. i, Fig. 3 ein Querschnitt durch die Presse nach der Linie III-III der Fig. i.Fig. I is a longitudinal section through the press with indicated tension rod, FIG. 2 shows a cross section through the press along the line II-II in FIGS. 1, 3 a cross section through the press along the line III-III of Fig. i.
i ist ein Teilstück des zu spannenden Stabes und 2 ein Ankerkörper, der am Ende eines Betonkörpers einbetoniert ist. Mit 3 ist eine radial im Pressenkörper angeordnete Aussparung bezeichnet, die sich über die ganze Länge des Pressenkörpers erstreckt und zur Aufnahme des Stabteiles i dient. Die Aussparung 3 verläuft vom Umfang des Pressenkörpexs bis soweit über die Längsachse hinaus, daß der- Stab i zentrisch zur Pressenlängsachse zu liegen kofiiit (Fig. 2) . q. sind zwei symmetrisch angeordnete Preßzylinder. Sie wirken auf eine gemeinsame Platte 5 (Fig. 3), in welcher der vorzuspannende Stab i mit Hilfe von Keilfuttern 6 in üblicher Weise eingespannt wird.i is a section of the rod to be tensioned and 2 is an anchor body, which is set in concrete at the end of a concrete body. With 3 is a radial in the press body arranged recess, which extends over the entire length of the press body extends and serves to accommodate the rod part i. The recess 3 runs from Circumference of the press body ex up to the point beyond the longitudinal axis that the rod i Kofiiit to lie centrically to the longitudinal axis of the press (Fig. 2). q. are two symmetrical arranged press cylinder. They act on a common plate 5 (Fig. 3), in which the rod i to be prestressed is clamped in the usual way with the aid of wedge chucks 6 will.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEB28510A DE940608C (en) | 1952-07-12 | 1952-07-12 | Press for applying tensile forces to the tendons in the manufacture of prestressed concrete |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEB28510A DE940608C (en) | 1952-07-12 | 1952-07-12 | Press for applying tensile forces to the tendons in the manufacture of prestressed concrete |
Publications (1)
Publication Number | Publication Date |
---|---|
DE940608C true DE940608C (en) | 1956-03-22 |
Family
ID=6962674
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEB28510A Expired DE940608C (en) | 1952-07-12 | 1952-07-12 | Press for applying tensile forces to the tendons in the manufacture of prestressed concrete |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE940608C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3194536A (en) * | 1963-03-06 | 1965-07-13 | James S Simms | Pre-stressed concrete reinforced strand tensioning device |
EP0518771A1 (en) * | 1991-06-13 | 1992-12-16 | FREYSSINET INTERNATIONAL et COMPAGNIE | Method of and device for the reinforcement of the pressure load capacity of concrete and reinforced concrete structures |
-
1952
- 1952-07-12 DE DEB28510A patent/DE940608C/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3194536A (en) * | 1963-03-06 | 1965-07-13 | James S Simms | Pre-stressed concrete reinforced strand tensioning device |
EP0518771A1 (en) * | 1991-06-13 | 1992-12-16 | FREYSSINET INTERNATIONAL et COMPAGNIE | Method of and device for the reinforcement of the pressure load capacity of concrete and reinforced concrete structures |
FR2677693A1 (en) * | 1991-06-13 | 1992-12-18 | Freyssinet Int & Co | IMPROVEMENTS IN PROCESSES AND DEVICES FOR REINFORCING CONCRETE WITH COMPRESSION AND CONCRETE STRUCTURES THUS REINFORCED. |
US5272851A (en) * | 1991-06-13 | 1993-12-28 | Freyssinet International Et Compagnie | Improvements to the devices for reinforcing concrete in compression and to concrete works thus reinforced |
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