SU1348443A1 - Arrangement for suspension mounting of bridge span structures - Google Patents

Description

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The invention relates to bridge construction and is intended to be mounted from separate blocks of superstructures of road bridges with a ride on top.

The aim of the invention is to reduce the labor intensity and increase the rate of installation of bridge span structures.

Fla of FIG. 1 shows the device, viewed from the facade of the bridge during the installation of the superstructure; figure 2 - section aa in figure 1; on fig.Z - section BB in figure 1; figure 4 is a section bb In figure 1; FIG. 3 shows the stages of operation of the device during the installation of the span.

The device includes a spatial farm 1 consisting of a longitudinal assembly crane 7 that is removed from

beams 2 and cross beams 3. Farm 1 spans the mounted span structure 4 from below and is fixed on it by means of upper cantilevers 5 and rollers 6 mounted both above and below the span 4. On the carriageway of the mounted span 4, a mounting crane 7 is installed that performs the installation of the span 4 of blocks 8. The beams 3 of the cross links have a mounting joint 9 in the middle of the span, and each half of the beam 3 is attached by a joint 10 with a vertical axis of rotation to the longitudinal beams 2. At the front end of the longitudinal beams 2 a lifting mechanism 11 with a support beam 12 having brackets 13 with supporting braces 14 and notches 15 for accommodating supporting parts 16 of the span 4 in them at the top of the bridge support 17. On spatial farm 1 there are working platforms 18.

The device works as follows.

The span structure 4 is assembled from individual blocks 8 by crane 7, moving along the assembled part of the span 4. The blocks 8 are delivered to the crane along the assembled part of the bridge from the shore. When the span structure is mounted, as the console extends, its bearing capacity is exhausted. console root and installation cannot continue without the support of this console. Ll this goal on mount30

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the superstructure console, and the spatial farm 1 are advanced so that its front end reaches the next bridge 17 of the bridge, as shown in fig. 3. In order to sag from its own end of the console, the movable part of the lifting mechanism 11 with its support beam 12 suspended at its end is raised to the upper position. With e, the lifting height is sufficient for the support beam 12 to forgive above the upper part of the bridge support 17, on which the support parts 16 of the span 4 are not yet installed. This operation can be performed as the span console 4 is unloaded due to its removal crane 7. The support beam 12 of the lifting mechanism 11 from the shoe 14 is mounted on the top of the support 17 hundred along the axis of the supporting parts 16. The lifting mechanism 11 raises the console of the span 4 to the design position (FIG. 3). The installation of the span structure is continued by crane 7. Before installing the supra-block on the top of the support, on sub-axles, the supporting parts of the superstructure 4 and the last block 8 of this span are mounted on the supporting parts 16. The lifting mechanism 11 lowers the superstructure 4 on the supporting parts 16. At the same time, the beam 12 unloads and rises above the top of the support 17, and the truss 1 again hangs on the rollers 6 on the span 4. The mounting to 7 continues the installation of blocks 8, and

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The bath part of the superstructure 4 mounts a spatial truss 1, having the possibility of longitudinal movement along the superstructure 4 by rolling it on rollers 6 along the upper and lower along the main beams of the superstructure 4. It remains completely

1Q is a free passage of the part of the spans 4 being mounted along which the crane 7 is moving and the vehicles feeding the blocks 8.

In the initial position of the space farm 1 on the cantilever of the span 4 (Fig. 1), the erecting crane 7 places the last block 8, for which the carrying capacity of the span 4 is still sufficient. After

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the span console, and the spatial farm 1 is advanced so that its front end reaches the next bridge 17 of the bridge, as shown in FIG. In order to raise the end of the cantilever sagging from its own weight, the movable part of the lifting mechanism 11 with the supporting beam 12 suspended at its end is lifted to the upper position. In this case, the lifting height is sufficient so that the support beam 12 forgives above the upper part of the bridge support 17, on which the support parts 16 of the span 4 are not yet installed. This operation can be performed because the console of the span 4 is unloaded due to the removal of mounting crane 7. The support beam 12 of the lifting mechanism 11 with the shoes 14 is mounted on the top of the support 17 mo. one hundred along the axis of the supporting parts 16. The lifting mechanism 11 lifts the console of the superstructure 4 to the design position (FIG. 3). Installation of the span is continued by crane 7. Before installing the supra-block 8 on the top of the support, on sub-brackets, the supports 16 of the span 4 and the last block 8 of this span are mounted on the supports 16 by the crane. The lifting mechanism 11 lowers the span 4 onto the supports 16. In this case, the support beam 12 unloads and rises above the top of the support 17, and the truss 1 again hangs on the rollers 6 on the superstructure 4. The mounting crane 7 continues the installation of the blocks 8, and the pro

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the stranded farm 1 is being propelled forward as the span structure 4 is ready, ensuring the availability of working platforms 18 for workers leading the installation. Promotion of the truss 1 through the bridge support 17 becomes possible due to the presence of notches 15 in the support beam 12 for the support parts 16 of the span structure 4 (the cut-outs allow the truss 1 to move forward after lifting the support beam 12 above the top of the support 17 without additional work, advancing farm 1 forward together with beam 12); brackets 13, equipped with shoes 14, which obschivaet receiving all loads strictly along the axis of the supporting parts 16; joints 9 in beams 3, which allow the beams to be divided into two parts; the hinges 10, around which the halves of the beams 3 of the transverse links rotate (they are mounted longitudinally about the axis of the bridge).

To move the beams 3 cross-links through the bridge support 17, disassemble the middle joint 9 and rotate the halves of the beams relative to the hinges 10, leaving the remaining beams 3 cross-links to disassemble the fdn, which alternately beams 3 cross-links , pass the entire spatial farm through the support 17 of the bridge. The upper console 5 can be made rotatable in a horizontal plane.

The proposed device provides continuous installation of span

Formula and

structures along its entire length, eliminating dismantling of the main structures of the device and the use of cranes for moving the device from one span to another, which reduces the laboriousness of the work and increases the installation rate.

acquisitions

Formula and

Claims (2)

1. A device for the mounted mounting of spans of bridges with a ride on top, including a spatial farm, containing longitudinal beams, combined by transversal st - made with the possibility of longitudinal movement along the mounted part of the span, the lifting mechanism mounted on the front end of the truss and interacting when the end of the truss is swaying with the support of the bridge by means of a support beam, characterized by that, in order to reduce labor intensity and increase the rate of installation, the longitudinal beams of an isometric truss are located on the sides of the span, and the cross-links are made in the form of detachable beams located under the span and are jointed to the longitudinal beams of an isalized truss. 2. The device according to claim 1, characterized in that the support beam of the lifting mechanism has brackets with support brackets supported on the top of the bridge support and cuts to accommodate support parts of the pro. weave structure. - d lol BUT 17 FIG. f 5 B Iff Axis ead / x span W, 12 fie. J 15 ; / B - in g and one OS gla8n1 1kh beams span noooo cmpoeHt ft 111 f (/ e. t IT t n f E-avJ-g ffg one f FIG. five