EP1908880A1 - Rigid coupling of sleepers - Google Patents

Abstract

The method involves making multiple pre-stressed concrete sleepers (12, 14) in a long clamping bed and interspersing the concrete sleepers by clamping steel wires (20-30) clamped in the clamping bed. The steel wires are anchored at front surface with full or desired pre-stressing force on anchor plate elements (16, 18) running along a front surface of the concrete sleepers. The anchor plate elements are pre-stressed by pre-stressing steel with a smooth surface running in a longitudinal direction of the sleeper, with the same pre-stressing force as the sleeper. An independent claim is also included for a connection between two pre-stressed concrete sleepers, and/or sections of pre-stressed concrete sleepers in particular pre-stressed concrete switch-point sleepers.

Description

The invention relates to a method for producing prestressed concrete sleepers having end faces, wherein a plurality of prestressed concrete sleepers are produced in a long tensioning bed and the several prestressed concrete sleepers are penetrated by prestressing steel wires tensioned in the tensioning bed.

In the railway junction construction prestressed concrete sleepers are required which require lengths of more than 5 m. With regard to the reduction of installation times on the construction site, switch elements are pre-assembled in the switch plant and transported to the construction site. Very long switch sleepers lead to bulky switch elements, which limit in particular the transport options. To simplify the pre-assembly, loading and unloading as well as transport, therefore, particularly long switch sleepers are manufactured in appropriate partial lengths, preassembled in suitable partial switch elements and connected to one another at the construction site.

For this purpose, currently vertically compliant connection systems are used, with which the points threshold sections are coupled to the required length and the coordinates for the attachment of the switch system are ensured.

In practice, however, it has been shown that depressions in the ballast bed occur at such connections.

It would be desirable to have a rigid connection that ensures at least the required carrying capacity of the switch threshold and thus counteracts the reduction in the coupling region of the Weichenschwellenteilstücke.

Prestressed concrete sleepers are in z. B. made 80 to 100 m long Spannbetten. The prestressing steel wires are anchored and prestressed at the ends of the tensioning beds. Within the fitted bed length, the required turnout thresholds are determined by dividing elements to be designated as shutdowns (see, for example, FIG. DE-A-195 19 617 ). After installing and compacting the concrete, the sheds are removed as soon as the concrete at the ends of the sleepers has sufficient green strength. Between the individual sleepers this results in a concrete-free gap at which the continuously tensioned prestressing steel wires are exposed. Once the concrete has reached the required strength, the end anchorages of the prestressing steel wires are gradually loosened, thereby transferring the prestressing force of the prestressing steel wires to the sleepers by direct bonding between the concrete and the profiled or ribbed prestressing steel wire surface. Subsequently, the exposed between the sleeper ends prestressing steel wires are cut flush with the Schwellenendflächen. The prestressing force of the prestressing steel wires is steadily increasingly transmitted to the concrete from zero at the end of the sleeper within an inlet area until at the end of the inlet area the full prestressing force of the prestressing steel wires acts on the concrete cross section of the turnout sleeper. As a result of the prestressing of the concrete cross-section, which gradually increases from the threshold end, the load-bearing capacity of the switch sleepers gradually decreases towards the end of the sleeper. This is insignificant for the normal application of the sleepers, but in view of the rigid connection, the tie ends and thus the coupling area constitute a weak point. In addition, the concrete in the introduction area of the prestressing force is exposed to high splitting tensile stresses, so that connection connections in the concrete of the sleeper ends impair the performance of the sleepers Overburden concrete.

Anchorages of tendons for prestressed concrete sleepers may be formed by wedge anchors, such as these DE-A-35 36 926 or the EP-A-0 322 317 can be seen.

By doing DE-U-299 06 351 For example, there is proposed a connecting device for multi-part railroad track concrete sleepers which is intended to solve the problem of connecting the sleeper parts to a threshold unit equivalent in area of the connection with respect to the transmission of bending moment, shear force and normal force of an unpolluted threshold without this however, could be technically realized. The connecting device consists of two steel H-shaped parts which are bolted together.

At a prestressed concrete sleeper after the DE-B-1 010 088 To prevent cracking and to make the threshold itself impact-resistant within a wide range, are used as reinforcement tension-type tendons as a main reinforcement and round bars medium strength cast as additional reinforcement.

A two-piece reinforced concrete sleeper is from the DE-C-505 518 known, wherein the threshold parts are connected to each other via flat spring joints made of iron.

Prestressed concrete sleepers sections are after the DE-A-38 29 659 connected via the adjacent ends receiving sleeves, wherein the gap between the threshold sections and the sleeve is shed frictionally.

The present invention is therefore based on the object prestressed concrete sleepers, in particular prestressed concrete sleepers, rigidly connect so that the coupling region can accommodate at least the required by the threshold, in particular switch threshold rated torque. The object is achieved by the measures to be taken from the claims, wherein individual measures are essential to the invention on their own or at least partially in combination.

Thus, the invention is represented by a method for producing prestressed concrete sleepers having end faces, wherein a plurality of prestressed concrete sleepers are produced in a long fitted bed and the several prestressed concrete sleepers are penetrated by prestressing prestressed steel wires, which are characterized in that along at least one end face of the prestressed concrete sleeper an anchor plate member extends in which at least the full or desired biasing force the prestressing steel wires are anchored to the end face.

In particular, it is provided that the anchor plate element is biased by at least one prestressing steel with at least in the longitudinal direction of the threshold extending smooth surface, wherein preferably the prestressing steel is anchored in the threshold cross section with full bias.

The anchor plate is biased by the prestressing steel with at least the same preload force as the threshold.

In other words, the threshold ends to be connected are each equipped with at least one anchor plate element, which is preferably anchored with at least the full biasing force of the prestressing steel wires at the respective end of the threshold and is non-positively connected to the anchor plate element of the connection threshold section. In this case, each individual prestressing steel wire is preferably anchored with the full biasing force to the respective anchor plate element at the threshold end.

In addition, it can be provided that the anchor plate element is prestressed by tension steels with a smooth surface, which are anchored in the threshold cross-section, preferably with full preload, with at least the same prestressing force as the threshold.

The different measures by which the anchor plate element are anchored with the full bias at the respective end, can also be used in combination such that they bias in the sum of the anchor plate element with at least the same biasing force as the threshold. In this case is It is not necessary that the individual prestressing steel wires or the prestressing steels are each anchored to the anchor plate element with the full prestressing force.

In particular, the invention relates to a connection between two prestressed concrete sleepers such as prestressed concrete sleepers, wherein the connection is characterized in that the prestressed concrete sleepers are frictionally connected via anchored to the mutually facing end faces of the prestressed concrete sleepers anchor plate elements, wherein the anchor plate elements at the respective end face with preferably substantially full biasing force of the prestressed concrete sleepers passing through prestressing steel wires are anchored.

In addition, it is additionally provided that the anchor plate elements are anchored via at least one U-shaped or loop-shaped prestressing steel within the prestressed concrete sleeper which has a smooth or essentially smooth surface at least in its region extending in the longitudinal direction of the reinforced concrete sleeper.

The prestressing steel wires may be connected to the anchor plate via prior art wedge anchors. Typical wedge anchors are eg the DE-A-35 36 926 to refer to the disclosure of which is referred.

Thus, the prestressing steel wires can pass through wedges, which are inserted into geometrically adapted recesses or receptacles, which are also referred to as housing, in the anchor plate. The wedge elements themselves should be multi-part segmental design or slotted in whole or in part.

To connect the anchor plates frictionally with each other, a variety of possible solutions is given. Thus, a longitudinal edge of an anchor plate pass into a U-shaped receptacle into which the other anchor plate to be connected to the anchor plate can be inserted. Opposite longitudinal edges of the anchor plates may be received by a clamping piece, which in turn is preferably connected by a bolt member with the U-shaped receptacle and clamped.

Alternatively, there is the possibility that each longitudinal edge of the anchor plates is chamfered, that the respective adjacent longitudinal edges are received by a common clamping piece and that the respective longitudinal edges receiving clamping pieces are interconnected via a bolt element and clamped.

Further details, advantages and features of the invention will become apparent not only from the claims, the features to be taken these features - alone and / or in combination - but also from the drawings to be taken preferred embodiments.

Fig. 1

eine Prinzipdarstellung einer biegesteifen Koppelung von Weichenschwellen,

Fig. 2

eine weitere Ausführungsform einer biegesteifen Koppelung von Weichenschwellen,

Fig. 3

eine Längsansicht von biegesteif gekoppelten Weichenschwellen, teilweise weggebrochen,

Fig. 4

eine Draufsicht auf die biegesteif gekoppelten Schwellen gemäß Fig. 3,

Fig. 5

eine Stirnansicht einer Weichenschwelle mit Ankerplatte,

Fig. 6

im Ausschnitt kraftschlüssig miteinander verbundene Ankerplatten,

Fig. 7

eine Grundplatte,

Fig. 8

die Grundplatte gemäß Fig. 7 in Draufsicht,

Fig. 9

einen Schnitt entlang der Linie A-A in Fig. 5, jedoch um 90° gedreht,

Fig. 10

einen Schnitt entlang der Linie B-B in Fig. 5, jedoch um 90° gedreht,

Fig. 11

eine weitere Ausführungsform von miteinander verbundenen Ankerplatten,

Fig. 12

die in Fig. 11 links dargestellte Ankerplatte und

Fig. 13

eine weitere Darstellung der Grundplatte.

Show it:

Fig. 1

a schematic representation of a rigid coupling of switch sleepers,

Fig. 2

a further embodiment of a rigid coupling of switch sleepers,

Fig. 3

a longitudinal view of rigidly coupled points sleepers, partially broken away,

Fig. 4

a top view of the rigidly coupled thresholds of FIG. 3,

Fig. 5

an end view of a switch threshold with anchor plate,

Fig. 6

in the cut frictionally interconnected anchor plates,

Fig. 7

a base plate,

Fig. 8

the base plate of FIG. 7 in plan view,

Fig. 9

a section along the line AA in Fig. 5, but rotated by 90 °,

Fig. 10

a section along the line BB in Fig. 5, but rotated by 90 °,

Fig. 11

another embodiment of interconnected anchor plates,

Fig. 12

the anchor plate shown on the left in Fig. 11 and

Fig. 13

another illustration of the base plate.

The figures are essential elements for rigid connection of concrete sleepers or parts thereof can be seen. In the following description, the same reference numerals are used in principle for the same elements. It should be noted, however, that regardless of the same reference numerals, the course of prestressing steel wires in the individual figures does not have to correspond to the position.

In Fig. 1 is a schematic representation of a rigid coupling 10 between prestressed concrete sleepers 12, 14 reproduced. The rigid coupling 10 between the thresholds 12 and 14 via anchor plates 16, 18 - also called anchor plate elements - which are explained in more detail below. In the anchor plates 16, 18 are anchored by wedge anchors, two of which are exemplified by the reference numerals 20, 22, prestressing steel wires, of which also by way of example some with the reference numerals 24, 26, 28, 30 are marked. In the anchor plates 16, 18, the prestressing steel wires 24, 26, 28, 30 with at least the full or desired biasing force to the respective end face of the concrete sleepers 12, 14, anchored. Preferably, each of the prestressing steel wires 24, 26, 28, 30 is anchored at the full pretensioning force to the respective anchor plate 16, 18 at the end of the sleeper.

As shown in FIG. 2, prestressing steels 32, 34 run within the prestressed concrete sleepers 12, 14 and have a smooth surface at least in the longitudinal direction of the concrete sleepers 12, 14. As the schematic representation of FIG. 2 illustrates, are in the longitudinal direction of the concrete sleepers 12, 14 a smooth surface having prestressing steels 32, 34 loop or U-shaped in the respective threshold 12, 14 laid.

3 and 4, the concrete sleepers 12, 14 are shown in longitudinal or plan view again, with more details of the anchor plates 14, 18 and their connection with each other are apparent. 3 shows a section along the line A-A in FIG. 4. Incidentally, the anchor plates 16, 18 will be described in detail below.

Regardless of this, it can be seen from the drawings and illustrations of FIGS. 3 and 4 that the anchor plates 16, 18 are at least non-positively connected via clamping pieces 36, 38, which in turn can be braced via a bolt element 40.

The prestressing steel wires 24, 26, 28, 30, 32, 34 can be fixed and tensioned via wedge anchors, two of which are designated in FIG. 4 by the reference numerals 42, 44.

In Fig. 5, which shows a section along the line B-B in Fig. 4, the anchor plate 18 is shown, which extends along the end face of the concrete sleeper 14. It can be seen that in the face or anchor plate 18 a total of 8 wedge anchors are provided to anchor the prestressing steel wires 24, 26, 28, 30, 32, 34 with the full or desired biasing force to the face of the concrete sleepers 12, 14.

The clamping of the prestressing steel wires 24, 26, 28, 30, 32, 34 and their anchoring takes place with measures that can be found in the prior art. By way of example, reference is made to the above-mentioned published patent application, but in particular to US Pat DE-A-36 20 019 as well as the DE-A-102 44 016 to whose reference content express reference is made.

The wedge anchors 44 consist of a housing 46, in which a multi-part segment-like or wholly or partially slotted wedge element 48 can be used, the of which is penetrated to exciting prestressing steel wire. The clamping can be done by the prestressing steel wire detecting presses.

By Fig. 8 should be clarified in principle that the housing 46 in the respective anchor plate 16, 18 are screwed.

As shown in FIG. 9, the anchor plates 16, 18 in its upper and lower edge 50, 52, which is referred to as a longitudinal edge, chamfered so that the anchor plates 16, 18 in correspondingly geometrically adapted receptacles 54, 56 of the clamping pieces 36, 38th can be used, which are connected via the anchor plates 16, 18 passing bolts 40 and clamped. As a result, the required frictional connection between the armature plates 16 and 18th

From FIGS. 11 and 12 an alternative connection possibility between anchor plates 58, 60 is shown. Thus, in the illustration in Fig. 11, the left anchor plate 58 on the foot side an L-shaped and a receptacle 60 forming welded leg 62. The receptacle 60 is geometrically designed such that in this the chamfered lower longitudinal edge 64 of the anchor plate 60 is inserted. The opposite edges 66, 68 are received by a clamping piece 70, which corresponds to the previously described embodiment. The clamping piece 70 is then penetrated by a bolt 72 which is screwed into the leg 62, so as to ensure the frictional connection between the armature plates 58, 60 and the clamping of the clamping piece 70.

In FIGS. 7, 8, 13, a base plate 72 - also called base plate element - a concrete sleeper is shown, which is not positively connected to a further plate, that extends along a free end of a concrete sleeper. The corresponding base plate 72 also has partial anchors to anchor the prestressing steel wires with the full or desired biasing force to the end face according to the teaching of the invention. In that regard, the base plate may be referred to as an anchor plate having the above-described properties or effects.

Due to the teaching of the invention threshold sections, especially points sleepers can be rigidly connected in such a way that the coupling reaches the same carrying capacity as the switch threshold in its range with full bias. The Schwellenteilstücke be rigidly connected so that the coupling region can accommodate at least the required by the turnout threshold rated moment by the connected end to be connected to at least one armature plate element anchored with at least the full biasing force of the prestressing steel wires at each threshold end and the anchor plate element the connection threshold piece is positively connected. In this case, each individual prestressing steel wire can be anchored to the respective anchor plate element at the threshold end with the full prestressing force. The anchor plate member may be further biased by tensioning wires with a smooth surface, which are anchored in the threshold cross-section with full bias, with at least the same biasing force as the threshold. The relevant possibilities can be used in such a way that they bias the sum of the anchor plate elements with at least the same biasing force as the threshold.

Claims (11)

Method for producing prestressed prestressed concrete sleepers, wherein a plurality of prestressed concrete sleepers are produced in a long fitted bed and the several prestressed concrete sleepers are penetrated by prestressing steel wires tensioned in the fitted bed,
characterized,
in that, along at least one end face of the prestressed concrete sleeper, there is a base or anchor plate element in which the prestressing steel wires are anchored to the end face with at least the full or desired prestressing force. Method according to claim 1,
characterized,
that the base or anchor plate member is biased by at least one prestressing steel wire having at least extending in the longitudinal direction of the threshold smooth surface. Method according to claim 1 or 2,
characterized,
that the prestressing steel wire is anchored in the threshold cross section with full prestressing. Method according to at least one of the preceding claims,
characterized,
that the base or anchor plate element is biased by the prestressing steel wire with at least the same biasing force as the threshold. Connection between two prestressed concrete sleepers (12, 14), or sections of prestressed concrete sleepers, in particular prestressed concrete sleepers,
characterized,
that the prestressed concrete sleepers (12, 14) at the mutually facing end faces of the prestressed concrete sleepers anchored anchor plate members (16, 18) are positively connected, wherein the anchor plate members at the respective end face, preferably having substantially the full biasing force of the prestressed turnout sleepers by passing prestressing steel wires (24, 26 , 28, 30, 32) are anchored. Connection according to claim 5,
characterized,
in that the anchor plate elements (16, 18) are anchored via at least one U-shaped or loop-shaped prestressing steel (32, 34) which, at least in its region extending in the longitudinal direction of the reinforced concrete sleeper (12, 14), is smooth or substantially smooth surface. A compound according to claim 5 or 6,
characterized,
that the tension steel wires (24, 26, 28, 30, 32) via wedge anchors (44) with the anchor plate (16, 18) are connected, whereby in particular the tension steel wires (24, 26, 28, 30, 32) receiving the wedge (48) in geometrically adapted recesses in the anchor plate (16, 18) are used and preferably the wedges (48) are formed in several parts like a segment and / or are wholly or partially slotted. A compound according to at least claim 7,
characterized,
in that the wedges (48) are accommodated in the outer geometry of the wedges adapted receptacles such as housings (46), which in turn can be inserted or screwed into the anchor plate elements (16, 18). A compound according to at least claim 5,
characterized,
that one of the anchor plate elements (16, 18) to be connected to one another in a force-locking manner has at one longitudinal edge a U-shaped receptacle (62) for the further anchor plate element (60) to be connected thereto. A compound according to at least claim 9,
characterized,
in that the anchor plate element (60) to be connected is connected in one longitudinal edge (64) via the U-shaped receptacle (62) and in the opposite longitudinal edge region (68) to the other anchor plate element (58) via a clamping piece (70), in particular the clamping piece (70) is braced via a bolt element (72) emanating from the U-shaped receptacle (60) or a leg (62) bounding the receptacle of the anchor plate element (58). A compound according to at least claim 5,
characterized,
in that the anchor plate element (16, 18, 58, 60) is chamfered on the outside in at least one longitudinal edge (50, 52, 66, 68) and that the chamfered longitudinal edge region runs within a clamping piece (36, 38, 70), wherein in particular each longitudinal edge ( 50, 52) of the anchor plate element (16, 18) is chamfered, that the respective adjacent longitudinal edges of the force-locking anchor plate elements (16, 18) are received by a common clamping piece (36, 38) and that the clamping pieces with each other via a bolt element (40 ) are braced.

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