DE3302070C1

DE3302070C1 - Transport anchor for a concrete part and concrete part with this transport anchor

Info

Publication number: DE3302070C1
Application number: DE19833302070
Authority: DE
Inventors: Eberhard 6074 Rödermark Tritzschak
Original assignee: Wensauer Betonwerk GmbH
Current assignee: Wensauer Betonwerk GmbH
Priority date: 1983-01-22
Filing date: 1983-01-22
Publication date: 1983-12-29

Abstract

A transport anchor for a concrete part, in particular concrete pipe (7), has a steel plate with a perforated anchor head for hanging in a transport hook and an anchor foot for embedding in the concrete part. In order to ensure a large pressure surface between the steel plate and the concrete, which introduces the weight force as pressure force in the longitudinal direction of the concrete part, the steel plate (3) has the shape of a an acute-angled roof, the perforation (6) passing through both legs (5) of the steel plate (3) close to the ridge and the foot ends lying opposite the ridge being connected by at least one bolt (4). In a cylindrical concrete part, in particular concrete pipe, with such a transport anchor, the ridge of the steel plate (3) extends transversely to the longitudinal direction of the concrete part. <IMAGE>

Description

Die Stahlplatte kann durch Biegen eines ebenen Stahlblechs hergestellt sein. Vorzugsweise ist sie jedoch aus zwei an ihrer einen Kante verschweißten Plattenteilen hergestellt, da das Biegen gegebenenalls eine zeitaufwendige, beim Schweißen entfallende Erhitzung erfordert. Alternativ können die Plattenteile durch Klemmen verbunden sein. The steel plate can be made by bending a flat steel sheet be. However, it is preferably composed of two plate parts welded at one edge manufactured, since the bending is sometimes a time-consuming one that is omitted during welding Requires heating. Alternatively, the plate parts can through Clamps be connected.

Auch der oder die Bolzen kann bzw. können einfach angeschweißt sein, wobei es genügt, lediglich auf der Bolzenoberseite zwischen dieser und der Stahlplatte eine Schweißnaht vorzusehen, da jeder Bolzen allenfalls auf Druck beansprucht wird, ohne daß die Schweißnähte nennenswert belastet würden.The bolt or bolts can also be simply welded on, it is sufficient only on the top of the bolt between this and the steel plate to provide a weld seam, since each bolt is subjected to pressure if necessary, without the weld seams being significantly stressed.

Besonders günstig ist es, den oder die Bolzen sich parallel zu dem First erstrecken zu lassen. It is particularly favorable if the bolt or bolts are parallel to the First to extend.

Vorzugsweise liegt der spitze Winkel im Bereich von etwa 5° bis 35°, vorzugsweise bei etwa 8". Dieser kleine Winkel erleichtert ein großflächiges Hinterfüllen des Ankerfußes auf dessen Außenseiten bis zu einer unmittelbaren Anlage an den Außenflächen der Transportankerschenkel. Die Gewichtskraft wird daher auch bei einem Schleuder-Betonteil über eine große Anlagefläche, die zur Verflachung des Ausbruchkegels beiträgt, als Druckkraft in die Ebene des Betonteils übertragen. The acute angle is preferably in the range from about 5 ° to 35 °, preferably at about 8 ". This small angle facilitates large-area backfilling of the anchor foot on its outer sides up to a direct contact with the outer surfaces the transport anchor leg. The weight force is therefore also with a sling concrete part over a large contact surface, which contributes to the flattening of the breakout cone, than Transfer compressive force into the plane of the concrete part.

Bei dem oder den Bolzen kann es sich um .eine Klemmschraube handeln. Bei einem Betonteil mit Stahlarmierung kann zur Befestigung ein Draht der Stahlarmierung zwischen den Schenkeln der Stahlplatte im Bereich zwischen Klemmschraube(n) und First oder den Fußenden einfach eingeklemmt werden. The bolt or bolts can be a clamping screw. In the case of a concrete part with steel reinforcement, a steel reinforcement wire can be used for fastening between the legs of the steel plate in the area between the clamping screw (s) and The ridge or the foot ends can simply be pinched.

Bei einem zylindrischen Betonteil, insbesondere Betonrohr, mit einem erfindungsgemäßen Transportanker erstreckt sich der First der Stahlplatte quer zur Längsrichtung des Betonteils. Hierbei werden die Gewichtskräfte überwiegend in die Rohrlängsrichtung eingeleitet, in der die tragende Masse größer als in Querrichtung ist. In the case of a cylindrical concrete part, in particular a concrete pipe, with a Transport anchor according to the invention, the ridge of the steel plate extends transversely to Longitudinal direction of the concrete part. Here, the weight forces are predominantly in the Introduced in the longitudinal direction of the pipe, in which the load-bearing mass is greater than in the transverse direction is.

Bei einem Betonteil, bei dem der Ankerkopf in einer Vertiefung des Betonteils senkrecht ist, kann sodann der Ankerkopf seitlich von der Lochung durch Beton abgedeckt sein. Dies erhöht ebenfa!ls die Ausbruch-oder Ausreißlast. In the case of a concrete part in which the anchor head is in a recess of the If the concrete part is vertical, the anchor head can then pass through the side of the perforation Concrete covered. This also increases the breakout or tear-out load.

Die Erfindung und ihre Weiterbildungen werden nachstehend anhand der Zeichnung eines bevorzugten Ausführungsbeispiels näher beschrieben. Es zeigt F i g. 1 einen Längsschnitt A-A, F i g. 2 einen Querschnitt B-B durch ein Betonrohr mit einem ersten Ausführungsbeispiel, F i g. 3 eine Vorderansicht und F i g. 4 eine Seitenansicht eines zweiten Ausführungsbeispiels und F i g. 5 eine Seitenansicht eines dritten Ausführungsbeispiels eines erfindungsgemäßen Transportankers. The invention and its developments are based on the following the drawing of a preferred embodiment described in more detail. It shows F i g. 1 shows a longitudinal section A-A, F i g. 2 shows a cross-section B-B through a concrete pipe with a first embodiment, FIG. 3 is a front view and FIG. 4 a Side view of a second exemplary embodiment and FIG. 5 is a side view of a third embodiment of a lifting anchor according to the invention.

Der Transportanker nach den Fig. 1 und 2 besteht aus einer spitzwinkligen Stahlplatte 3 und zwei die Transportanker-Fußenden verbindenden Bolzen 4. Die Stahlplatte 3 besteht aus zwei gleichen Plattenteilen 5, die an ihrer einen Querkante unter einem Winkel a von etwa 50 bis 35°, vorzugsweise 8°, verschweißt und in ihrem den Ankerkopf bildenden Teil in gleicher Höhe mit je einem Loch 6 versehen sind. Die Löcher 6 bilden eine gemeinsame Lochung zur Durchführung eines Hakens, vorzugsweise handelsüblichen Sicherheits-Ösenhakens, an dem das Betonrohr 7, in dem der Transportanker mit seinem Ankerfuß einbetoniert ist, transportiert werden kann. The lifting anchor according to FIGS. 1 and 2 consists of an acute-angled Steel plate 3 and two bolts 4 connecting the lifting anchor foot ends. The steel plate 3 consists of two identical plate parts 5, one of which is below the transverse edge an angle α of about 50 to 35 °, preferably 8 °, welded and in their the The part forming the anchor head is provided with a hole 6 each at the same height. the Holes 6 form a common hole for the implementation of a hook, preferably commercially available safety eye hook on which the concrete pipe 7, in which the transport anchor is concreted in with its anchor foot, can be transported.

Die Plattenteile 5 erstrecken sich quer zur Längsrichtung des Betonrohrs 7 Der Ankerkopf ist in einer Vertiefung 8 in der Außenseite des Betonrohrs 7 versenkt Wegen des spitzen Winkels a kann der Beton während der Herstellung des Betonrohres 7 und dem gleichzeitigen Einbetonieren des Transportankers auch bei einem Schleuderbetonrohr 7, bei dem der frische Beton während des Schleuderns radial nach außen gedrückt wird, leicht die Außenflächen 9 der durch die Plattenteile 5 gebildeten Schenkel 5 des Transportankers hinterfüllen, so daß der Beton, ohne Lücken zu bilden, dicht an den Außenflächen 9 anliegt Die während des Transports in Richtung des Pfeiles P wirkende statische oder dynamische Gewichtskraft verteilt sich daher großflächig über die einbetonierten Abschnitte der Plattenteile 5 mit einer großen Kraftkomponente senkrecht zu den Außenflächen 9. The plate parts 5 extend transversely to the longitudinal direction of the concrete pipe 7 The anchor head is sunk into a recess 8 in the outside of the concrete pipe 7 Because of the acute angle α, the concrete can during the manufacture of the concrete pipe 7 and the simultaneous setting in concrete of the transport anchor, even with a spun concrete pipe 7, in which the fresh concrete is pressed radially outwards during spinning is slightly the outer surfaces 9 of the legs formed by the plate parts 5 5 of the lifting anchor backfill so that the concrete is tight without forming gaps rests against the outer surfaces 9 during transport in the direction of the arrow P acting static or dynamic weight force is therefore distributed over a large area About the concrete-embedded sections of the plate parts 5 with a large force component perpendicular to the outer surfaces 9.

Diese Kraftkomponente -wirkt als Druckkraft im wesentlichen in Längsrichtung des Betonrohrs 7 und ergibt einen sehr flachen, sich weit in Längsrichtung des Betonrohrs 7 erstreckenden Ausbruchkegel 10, der in Längsrichtung des Rohres 7 Wegen der Rohrkrümmung wesentlich länger als in Querrichtung ist und eine sehr hohe in Richtung des Pfeiles Pwirkende Ausbruch- oder Ausreißlast gewährleistet.This force component acts as a compressive force essentially in the longitudinal direction of the concrete pipe 7 and results in a very flat, extending far in the longitudinal direction of the concrete pipe 7 extending outbreak cone 10, which in the longitudinal direction of the pipe 7 because of the pipe curvature is much longer than in the transverse direction and a very high one in the direction of the arrow P effective breakout or pull-out load guaranteed.

Die Ausbruchlast läßt sich noch dadurch erhöhen, daß der Ankerkopf auch in den Bereichen seitlich von den Löchern 6 einbetoniert, & h. die Vertiefung in Querrichtung des Rohres 7 schmaler ausgebildet wird. The breakout load can be increased by the anchor head also concreted in the areas to the side of the holes 6, & h. the depression is made narrower in the transverse direction of the tube 7.

Die Bolzen 4 werden allenfalls auf Druck beansprucht, wobei jedoch der überwiegende Teil der Druckkraft von dem zwischen den Plattenteilen 5 vorhandenen Beton aufgenommen wird. Es genügt daher, lediglich auf den Oberseiten der Bolzen 4 eine Schweißnaht zwischen diesen und den Plattenteilen 9 vorzusehen. The bolts 4 are at most subjected to pressure, although the predominant part of the pressure force from that existing between the plate parts 5 Concrete is added. It is therefore sufficient only on the tops of the bolts 4 to provide a weld seam between these and the plate parts 9.

Das Ausführungsbeispiel nach den F i g. 3 und 4 unterscheidet sich von dem nach den F i g. 1 und 2 nur dadurch, daß der Winkel a bei etwa 8" liegt, aber auch im Bereich von 5° bis 15° liegen kann, und die Bolzen 4 nicht senkrecht zu der den Winkel a halbierenden Ebene, wie bei dem Ausführungsbeispiel nach den F i g. 1 und 2, stehen, sondern in dieser Ebene liegen. Sie sind ebenfalls angeschweißt Das Ausführungsbeispiel nach Fig.5 unterscheidet sich von dem nach den F i g. 3 und 4 nur dadurch, daß die Bolzen 4 als Klemmschrauben ausgebildet sind, die die beiden Plattenteile 5 durchsetzen, und daß im montierten Zustand ein Draht 11 einer Stahlarmierung des Betonteils zwischen den beiden Plattenteilen 5 bzw. The embodiment according to FIGS. 3 and 4 are different of the according to the F i g. 1 and 2 only in that the angle a is about 8 ", but can also be in the range from 5 ° to 15 °, and the bolts 4 are not perpendicular to the plane bisecting the angle a, as in the embodiment according to the F i g. 1 and 2, stand, but lie in this plane. They are also welded on The embodiment according to FIG. 5 differs from that according to FIGS. 3 and 4 only in that the bolts 4 are designed as clamping screws that the enforce both plate parts 5, and that in the assembled state a wire 11 one Steel reinforcement of the concrete part between the two plate parts 5 or

Schenkeln im Bereich zwischen den Klemmschrauben 4 und dem First der Stahlplatte 3 eingeklemmt ist Diese Ausführung ist besonders bei einem Betonrohr vorteil haft.Legs in the area between the clamping screws 4 and the ridge of the Steel plate 3 is clamped This design is particularly useful for a concrete pipe advantageous.

Alternativ kann bei dem Ausführungsbeispiel nach F i g. 5 die Schweißung am First entfallen und der Draht lt zwischen den Klemmschrauben 4 und den Fußenden der Plattenteile 5 eingeklemmt sein. Alternatively, in the embodiment according to FIG. 5 the weld omitted on the ridge and the wire is between the clamping screws 4 and the foot ends the plate parts 5 be clamped.

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Claims

Claims: 1. Transport anchor for a concrete part, in particular Concrete pipe - with a perforated anchor head for hanging a transport hook and an anchor foot for setting in concrete in the concrete part having -steel plate, characterized in that the steel plate (3) has the shape of an acute-angled Roof has that the perforation (6) both legs of the steel plate (3) in the vicinity of the ridge penetrated and that the foot ends opposite the ridge by at least a bolt (4) are connected.

2. Transport anchor according to claim 1, characterized in that the Steel plate (3) made of two welded at one edge or connected by clamps Plate parts (5) consists.

3. Transport anchor according to claim 1 or 2, characterized in that that the bolt or bolts (4) is or are welded on.

4. Transport anchor according to one of claims 1 to 3, characterized in that that the bolt or bolts (4) extends approximately parallel to the ridge or

-stretch.

5. Transport anchor according to one of claims 1 to 4, characterized in that that the acute angle (a) in the range of about 5 ° to 35 °, preferably at about 80 lies.

6. Transport anchor according to one of claims 1, 2 and 5, characterized in that that the bolt or bolts (4) is or are a clamping screw.

7. Concrete part, especially concrete pipe, with a transport tanker Claim S and with steel reinforcement, characterized in that a wire (11) the steel reinforcement between the legs of the steel plate (3) in the area between Clamping screw (s) (4) and ridge or the foot ends is jammed.

8. Cylindrical concrete part, in particular concrete pipe, with a transport anchor according to one of claims 1 to 7, characterized in that the ridge is the Steel plate (3) extends transversely to the longitudinal direction of the concrete part (7).

9. Concrete part according to claim 8, wherein the anchor head in a recess (8) of the concrete part (7) is sunk, characterized in that the anchor head is laterally is covered by the perforation (6) by concrete.

The invention relates to a transport anchor for a concrete part, - In particular concrete pipe, with a perforated anchor head for hanging a Transport hook and an anchor foot for setting in concrete in the concrete part Steel plate. The invention also relates to a cylindrical concrete part such a transport anchor.

In a known lifting anchor of this type, the steel plate the shape of an elongated strip with a hole at one end to the Passage ~ of the transport hook and has an incision at its other end, the 'two oppositely bent legs separates such a lifting anchor is also called "expansion anchor". With this expansion anchor, only the proportions are in proportion small outer surfaces of the splayed Legs as pressure surfaces for converting the tensile force exerted on the lifting anchor during transport in a longitudinal direction of the concrete part acting compressive force available. The consequence is that the Breakout load relevant breakout cone angle is relatively acute, so that the breakout or pull-out load is relatively low when using such a transport anchor for spun concrete pipes the risk of that the fresh concrete because of the relatively large angle of spread between the Legs on the expansion anchor concreted in radially with the anchor head facing outwards does not fill the space behind the thighs, d. H.

does not come into contact with the outer surfaces of the legs. The effective The pressure area of the legs is therefore even smaller.

To reduce the risk of tearing or chipping, it is also known to weld these lifting anchors to the reinforcement of the concrete part or to be connected with a form-fit connection with additional iron that is also set in concrete. This represents however, an expensive additional operation in the production of the concrete part without the load-bearing capacity of the connection between the transport anchor and the concrete part to increase significantly.

Other lifting anchors are also known, e.g.

so-called "spherical head" transport anchors, which are a fully cylindrical body with a flat ball head at one end and an approximately conical foot at the other end. Even with such a transport anchor the breakout load is low because of the relatively acute breakout cone. Then is a complex special for coupling the lifting anchor with a lifting rope Coupling required. Since such couplings are only legally required for safety reasons Such an anchor system is allowed to be used for a fixed number of years particularly expensive.

The invention is based on the object of a transport anchor and to specify a concrete part with a lifting anchor of the generic type that without Significant additional effort, a higher load on the connection between the transport anchor and concrete part enables. According to the invention, the transport anchor is designed in such a way that that the steel plate has the shape of an acute-angled roof that the perforation penetrated both legs of the steel plate near the ridge and that the dem First opposite foot ends are connected by at least one bolt.

In this training, the anchor foot has' relatively on its outer sides large pressure areas over which the weight force in a substantially perpendicular to the weight acting pressure force is converted, so that a relatively results in a large breakout cone angle, which ensures a high breakout or tear-out load. In order to connect the anchor to a transport rope, a common, commercially available Transport hooks, e.g. a snap hook, can be used. A custom-made coupling therefore not applicable.