CZ2011315A3 - Center for concreting superstructure of bridges - Google Patents

Abstract

Sliding ring for concrete constructions of the bridge structure with at least one tube (1), consisting of a steel spatial truss structure, where the spatial truss is made up of a railway bridge component selected from the group consisting of individual or combined upper and lower strips (3) diagonals (4), verticals (5), crossbars (6) and vertical or horizontal diagonal elements (7). This lattice structure comprises at least two vertical walls (2) in the assembled assembled state, each of which is formed by an upper and a lower (3) strip which are connected to each other by diagonal members (4) and verticals (5), where the vertical walls ( 2) are rigidly connected to each other by a crossbar assembly (6), complemented by reinforcing vertical or horizontal diagonal elements (7).

Description

Beam for concreting the bearing structure of bridges.

Technical field

The present invention relates to an assembly of a movable truss, made of material of a modernized railway bridge ŽM16M, for concreting the bearing structure of bridges.

BACKGROUND OF THE INVENTION

Rings for concreting bridges are available as finished products with predetermined external dimensions and construction, or they are made to order according to the requirements of a particular building. The disadvantages are that they cannot be used for all types of bridges and are able to carry only a certain load and to a certain span with limited choice of their size. They consist of large parts and therefore have limited variability.

SUMMARY OF THE INVENTION

The invention relates to a movable ring for concreting a bearing structure of bridges with at least one tube formed by a steel spatial truss structure.

SUMMARY OF THE INVENTION The spatial lattice structure is comprised of railway bridge members selected from the group comprising, either individually or in combination, an upper and a lower belt, diagonals, vertical, crossbars and vertical or horizontal diagonal elements, wherein the lattice structure in a functional the assembled state comprises at least two vertical walls, each of which is formed by an upper and a lower strip, which are connected to each other by diagonal members and verticals, and wherein the vertical walls are rigidly connected to each other by a set of crossbars supplemented by reinforcing vertical or horizontal diagonal elements. The crossbars and the vertical or horizontal diagonal elements may alternatively be assembled from lengthwise modified, i.e., elongated or shortened sections of the railway bridge.

In practice, it is possible to realize a circle from individual parts of the upgraded railway bridge ŽM16M or ŽM16 with their appropriate arrangement allowing to transfer the load during concreting of all types of bridges irrespective of the size of this load, cross-sectional shape or regardless of bridge span. The advantage is the high variability of the whole system.

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In one embodiment of the invention, the individual vertical walls of the tubes of the ring are arranged adjacent to each other in a number of two to three and are rigidly connected to each other. In another embodiment, the individual vertical walls of the lattice structure are arranged vertically one above the other and rigidly connected to each other.

The displacement ring formed as described above may further comprise a movable or fixed beam assembly to support or suspend the formwork of the formed deck. It can be supported on temporary supports, with a partially completed deck and with a formed deck, and adapted to be moved longitudinally, for example by means of extension stools, to the next concrete block of the deck.

Thus, the skeleton is formed by one or more tubes placed side by side, wherein the tube tube is a spatial truss structure which is composed of individual parts of a railway bridge, for example a ŽM16M bridge, by means of bolted connections. These tubes may be located below the formed deck, then it is the lower ring, or may be located above the formed deck, then the upper ring. The individual tubes of the displacement ring are moved longitudinally between the individual concreting bars with the help of displacement stands. The length of individual tubes is almost arbitrary and depends on the shape of the bearing structure of a particular bridge. The width of the individual tubes depends on the length of the crossbars and the length of the vertical and horizontal diagonal elements.

Depending on the shape of the bridge structure, the standard tube width can be adjusted by shortening or extending the crossbeams and the vertical and horizontal diagonal elements.

Depending on the shape of the bearing structure of a particular bridge, it is possible to further change the composition of the elements of the individual tube tubes and other parameters as follows:

requirement modification of the tubes or other parameters increasing the load-bearing capacity of the ring increase the number of tubes increase of load capacity of the tube increasing the number of walls in the tube - walls can be placed side by side or above each other increase of bearing capacity of the wall replacement of standard upper and

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lower belts with reinforced belts increase of bearing capacity of the wall replacing standard diagonal members with reinforced diagonal members increase of bearing capacity of the wall replacement of standard verticals reinforced shrinks extension or reduction of the circle adding or removing individual panels forming the walls of the circle widening or narrowing the tube of the circle appropriate arrangement of the crossbars and vertical and horizontal diagonal elements or their extension or shortening

The individual tubes of the movable ring can be complemented with a movable or fixed assembly of beams to support or suspend the formwork of the bridge deck or the formwork structure can be placed directly on the tubes of the ring itself.

BRIEF DESCRIPTION OF THE DRAWINGS

For further explanation, embodiments of the invention are illustrated in the accompanying drawings and described in detail below. Fig. 1 shows an example of a displacement ring in side and plan view and in cross-section. It is the bottom ring, where the bearing structure of the bridge is concreted above the ring. In Fig. 2, the fold according to Fig. 1 is shown in a casting position, supported on provisional supports with the finished bridge deck portion indicated, with the bridge deck portion being formed, and also with the formwork that is supported on the movable beam assembly. This beam assembly is supported on the tubes of the ring. Fig. 3 shows an example of another embodiment of the lower displacement ring. The arrangement of the ring in Fig. 4 corresponds to the embodiment of Fig. 3, but in this case there is no assembly of beams for supporting the formwork of the deck, but this formwork is directly supported on the upper strips of the individual tubes of the displacement ring. FIG. 5 shows an example of an embodiment of an upper transfer ring where the bridge structure is concreted under the ring. In FIG. 6, the curl according to FIG. 5 is shown in a casting position, supported on provisional supports with the finished bridge deck portion being formed and the bridge deck portion being formed. The frame is complemented by a fixed set of beams on which the formwork is suspended. Fig. 7 shows the most frequently used parts of the railway bridge ŽM16M, from which individual tubes of the ring are mounted.

DETAILED DESCRIPTION OF THE INVENTION

Fig. 1 shows a lower displacement ring for concreting a bridge structure consisting of two tubes 1, each tube being a steel spatial lattice structure comprising three vertical walls 2 interconnected by crossbeams 6 and vertical and horizontal diagonal elements 7. vertical walls 2 are formed by upper and lower strips 3, which are connected to each other by diagonal members 4 and verticals 5. Both upper and lower strips 3, diagonals 4, vertical 5, crossbars 6, vertical or horizontal diagonal elements 7 are assembled from the modernized railway bridge ŽM16M. Depending on the static calculation of the torsion, the vertical 5, diagonal elements 4 or strips 3 may be replaced in the more stressed parts of the torsion by reinforced verticals, reinforced diagonal elements or reinforced _in strips, also from the ŽM16M railway bridge accessories. The tubes of the skeleton carry a movable set of beams 8 on which the formwork 9 of the decking deck 10 is supported. In FIG. 2, the movable deck, corresponding to the embodiment of FIG. 1, is shown on the provisional supports 12 with the already formed deck decking deck 11 and 10. The frame mounted on the provisional supports 12 is brought to the desired height by means of hydraulic jacks, and after the construction of the respective section of the deck 10, the system of beams 8 for supporting the formwork 9 of the deck 10 is disconnected. Depending on the shape of the bridge pillar, the support structure 8 for the shuttering formwork 9 of the bridge deck 10 moves in the transverse direction together with the respective tube of the curl and subsequently the whole is moved longitudinally.

Fig. 3 shows an example of another embodiment of a displacement ring. Its individual tubes 1 are each formed by only two walls 2 which are connected to each other by crossbars 6 and vertical and horizontal diagonal elements 7. The individual vertical walls 2 are formed by upper and lower strips 3, which are connected to each other by diagonal members 4 and verticals 5. Upper also the lower strip 3, diagonals 4, vertical 5, crossbars 6, vertical or horizontal diagonal elements 7 are assembled from the parts of the modernized railway bridge ŽM16M. Depending on the particular shape of the deck 10, in this case the individual tubes of the displacement ring are tapered. This is achieved by shortening the crossbars 6 and by shortening the vertical or horizontal diagonal elements 7. In FIG.

The formwork beams 8, but the formwork 9 of the joist bridge deck 10, are directly supported on the upper supporting strips 3 of the sliding ring.

5 shows another possible embodiment of the present invention. It is an upper displacement ring of one tube, which is formed by four walls 2. On this tube is suspended on both sides a set of beams 8 for storage, respectively. In this case, the formwork suspension 9 is shown. FIG. 6 shows an embodiment of the upper transfer ring according to FIG. 5, with the structure of the formwork 9 of the bridge deck decking 10 and the concreting process with the transfer of the ring shown.

In order to achieve the necessary dimensions of the curb and its necessary load-bearing capacity for the given bearing structure of the bridge, its individual elements are in all cases assembled into a variable assembly and after assembly they create a spatial truss structure. The whole system is wholly supported or supported on the temporary supports 12 during the concreting of individual bars of the bridge structure. The provisional supports 12 are laid on pillar foundations or on the ground or on the bridge structure constructed one bar earlier (already constructed, previously concreted roadway 11). The entire system is moved longitudinally in the direction of the bridge between the individual bars on the pull-out stands using hydraulics. The frame according to the invention is suitable for concreting both beam and chamber bridges, with load and span according to the specific requirements of the building.

Industrial applicability of the invention

The displacement ring for concreting the bearing structure of the bridges according to the invention is based on the use of the parts of the modernized railway bridge ŽM16M.

Claims (6)

PATENT CLAIMS Movement ring for concreting a bridge structure with at least one tube (1), consisting of a steel lattice structure, characterized in that the lattice structure is formed of railway bridge members selected from the group comprising, individually or in combination, an upper a lower strip (3), diagonals (4), vertical bars (5), crossbars (6) and vertical or horizontal diagonal elements (7), wherein the truss structure in the assembled state includes at least two vertical walls (2), each of which These are formed by an upper and a lower (3) strip, which are interconnected by diagonal members (4) and perpendiculars (5), where these vertical walls (2) are fixed to each other by a set of crossbars (6), supplemented by reinforcing vertical or horizontal diagonal elements (7). Device according to claim 1, characterized in that the crossbeams (6) and the vertical or horizontal diagonal elements (7) are assembled from lengthwise, i.e., elongated or shortened, sections of the railway bridge. Device according to claim 1 or 2, characterized in that the individual vertical walls (2) of the tubing of the ring are arranged adjacent to each other, in the number of two to three, and are rigidly connected to each other. Device according to claims 1 to 3, characterized in that the individual vertical walls (2) of the truss structure are arranged vertically one above the other and are fixedly connected to one another. The device according to any one of claims 1 to 4, characterized in that the displacement ring further comprises a movable or fixed assembly of beams (8) relative thereto for supporting or suspending the formwork structure (9) of the formed deck (10). Device according to one of Claims 1 to 5, characterized in that the displacement ring is mounted on the provisional supports (12), with the already completed deck (11) and with the formed deck (10), and adapted for longitudinal displacement, e.g. using extension stools, to the next concrete block of the deck.