Auxiliary supporting device for installing steel box girder of bridge girder erection machine

Abstract

The utility model relates to an auxiliary supporting device for installing a steel box girder on a bridge girder erection machine, which comprises a front track, a rear track and a rear track, the upper ends of the triangular supports are fixedly connected with the middle of the front rail, and the lower ends of the triangular supports are matched with the middle of the cover beam in a supporting mode. The upper ends of the diagonal bracing supports are fixedly connected with the outer end of the front rail, and the lower ends of the diagonal bracing supports are connected with the cover beam check blocks at the left end and the right end of the cover beam; a transverse limiting block is welded to the lower portion of the inclined strut support, and the transverse limiting block is in transverse limiting fit with the bent cap check block. The device is simplified in structure and convenient to machine, the stability of the bridge girder erection machine is improved under the working condition that the height difference of front and rear rails is large, and therefore installation safety is ensured; meanwhile, the device is formed through one-time welding, temporary supporting is not needed when the bridge girder erection machine passes through a hole every time, construction efficiency is improved, and the construction period is shortened.

Description

Technical Field

[0001] The utility model relates to the field of installation of long - span steel boxes by a bridge girder erection machine, and specifically relates to an auxiliary support device for installing steel box girders by a bridge girder erection machine. Background Art

[0002] At present, when most box girders are installed by a bridge girder erection machine, the support of its front track mainly relies on the form of a capping beam + vertical supporting square timbers to balance the height difference between the front and rear tracks of the bridge girder erection machine. In this way, the stability of the bridge girder erection machine is poor when it moves laterally. And this installation method is mainly applicable to the situation where the height difference between the front and rear tracks is small. However, when using a bridge girder erection machine to install long - span steel box composite girders, the height difference between its front and rear tracks is as high as 4.7 m. If square timbers are still used to support the front track of the bridge girder erection machine, its stability is poor, thus greatly increasing the safety risk. Summary of the Utility Model

[0003] The purpose of the utility model is to provide an auxiliary support device for installing steel box girders by a bridge girder erection machine, aiming to overcome the defects of the prior art and solve the problem of poor stability of the bridge girder erection machine under the condition that the height difference between its front and rear tracks is large (more than 4 m) when using the bridge girder erection machine to install long - span steel box composite girders.

[0004] To this end, the utility model proposes an auxiliary support device for installing steel box girders by a bridge girder erection machine, which includes a front track, which is horizontally arranged and located under the front end of the bridge girder erection machine; a pair of symmetrically arranged triangular brackets, the upper ends of the triangular brackets are fixedly connected to the middle part of the front track, and the lower ends of the triangular brackets are in supporting cooperation with the middle part of the capping beam; and a pair of symmetrically arranged diagonal support brackets, the upper ends of the diagonal support brackets are fixedly connected to the outer ends of the front track, and the lower ends of the diagonal support brackets are connected to the capping beam blocks at the left and right ends of the capping beam; wherein, a transverse limit block is welded at the lower part of the diagonal support bracket, and the transverse limit block is in transverse limit cooperation with the capping beam block.

[0005] As a preferred technical solution of the present application, the transverse limit block and the capping beam block are fixed by a steel rod to form a hoop device.

[0006] As a preferred technical solution of the present application, the triangular bracket is welded by profiled steel into a flat connection + triangular support connection.

[0007] As a preferred technical solution of the present application, the triangular bracket includes two sets of triangular supports composed of a second vertical beam, a pair of second diagonal braces, and a second longitudinal beam, and also includes a flat connection structure composed of a third diagonal brace and a pair of cross beams.

[0008] As a preferred technical solution of the present application, the diagonal support bracket includes a first vertical beam, a first longitudinal beam, and a pair of first diagonal braces.

[0009] As a preferred technical solution of the present application, the upper end of the diagonal support bracket is welded to the front track.

[0010] As a preferred technical solution of the present application, the upper end of the triangular support is welded to the front track.

[0011] As a preferred technical solution of the present application, both the diagonal bracing support and the triangular support are formed by butt welding of 20a channel steels.

[0012] The auxiliary support device for installing the steel box girder of the bridge erecting machine provided by the utility model has a simplified structure and is convenient for processing, improves the stability of the bridge erecting machine under the working conditions with a large height difference between the front and rear tracks, thereby ensuring the installation safety; at the same time, the device is formed by one-time welding and there is no need to carry out temporary support every time the bridge erecting machine passes through the hole, improving the construction efficiency and shortening the construction period.

[0013] In addition to the purposes, features and advantages described above, the present application has other purposes, features and advantages. The following will refer to the drawings to make a further detailed description of the present application. Description of the Drawings

[0014] The specification drawings constituting a part of the present application are used to provide a further understanding of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation of the present application. In the drawings:

[0015] Figure 1 is a schematic structural diagram of the auxiliary support device for installing the steel box girder of the bridge erecting machine of the utility model;

[0016] Figure 2 is a partial enlarged view of the auxiliary support device for installing the steel box girder of the bridge erecting machine of the utility model;

[0017] Figure 3 is a side view of the diagonal bracing support in the auxiliary support device for installing the steel box girder of the bridge erecting machine of the utility model;

[0018] Figure 4 is a side view of the triangular support in the auxiliary support device for installing the steel box girder of the bridge erecting machine of the utility model;

[0019] Figure 5 is a front view of the triangular support in the auxiliary support device for installing the steel box girder of the bridge erecting machine of the utility model;

[0020] Description of the Reference Numerals

[0021] 1. Diagonal bracing support; 2. Triangular support; 3. Capping beam; 4. Front track; 5. Steel box composite beam; 6. Steel rod; 7. Lateral limiting block; 8. Capping beam stop block; 9. Bridge erecting machine; 11. First vertical beam; 12. First diagonal bracing; 13. First longitudinal beam; 21. Second vertical beam; 22. Second diagonal bracing; 23. Second longitudinal beam; 24. Cross beam; 25. Third diagonal bracing. Detailed Embodiments

[0022] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0023] As Figures 1 to 5 shown, the auxiliary support device for installing steel box girders of the bridge erecting machine of the present utility model has a relatively simple structure, mainly made of butt-welded 20a channel steel, and includes a pair of inclined support brackets 1, a pair of triangular support brackets 2, a pair of hoop devices, and a front track 4 arranged horizontally; wherein, a pair of inclined support brackets 1 and a pair of triangular support brackets 2 are respectively fixedly connected to the front track 4 and are symmetrically arranged left and right.

[0024] Specifically, the inclined support bracket 1 and the triangular support bracket 2 are processed according to the height difference between the front and rear tracks of the bridge erecting machine and are welded to the front track 4 as a whole. The upper end of the inclined support bracket 1 is fixedly connected to the outer end of the front track 4, and the lower end of the inclined support bracket 1 is connected to the capping beam blocks 8 at the left and right ends of the capping beam 3; the upper end of the triangular support bracket 2 is fixedly connected to the middle of the front track 4, and the lower end of the triangular support bracket 2 is in supporting cooperation with the middle of the capping beam 3.

[0025] Among them, to improve the stability of the support, the triangular support bracket 2 is welded with sections according to the designed position of the steel box composite beam 5 to form a flat connection + triangular support connection. The triangular support bracket 2 includes two sets of triangular supports composed of vertical beams II 21, a pair of inclined braces II 22, and longitudinal beams II 23, and also includes a flat connection structure composed of an inclined brace III 25 and a pair of cross beams 24. Similarly, the inclined support bracket 1 includes a vertical beam I 11, a longitudinal beam I 13, and a pair of inclined braces I 12.

[0026] The upper part of the triangular support bracket 2 is welded to the front track 4, and the lower part can directly fall on the capping beam 3, which is convenient for the bridge erecting machine 9 to pass through the hole. After the beam slab is installed, passing through the hole is carried out synchronously with the front track, and there is no need for secondary height adjustment. The workload of supporting the front track is greatly reduced, and the installation safety of the steel box composite beam is improved.

[0027] The inclined support bracket 1 is mainly determined according to the position of the capping beam block 8 and the length of the front track 4. The upper part of the inclined support bracket 1 is welded to the bottom of the front track 4, and the lower part of the inclined support bracket 1 is connected to the capping beam block 8. At the same time, a transverse limit block 7 is welded to the lower part of the inclined support bracket 1, and the transverse limit block 7 is in transverse limit cooperation with the capping beam block 8. The transverse limit block and the capping beam 3 are fixed by a steel rod 6 to form a hoop device, which improves the transverse stability. Before the bridge erecting machine 9 passes through the hole, only the steel rod 6 needs to be loosened to disengage from the capping beam block 8.

[0028] The working principle and working process of the auxiliary support device for installing steel box girders of the bridge erecting machine of the present utility model are briefly described below.

[0029] Before installing the steel box composite beam, first process the diagonal brace supports and triangular supports according to the height difference between the front and rear tracks, and weld them into a whole with the front track. The diagonal brace supports are mainly determined according to the position of the pier block and the length of the front track. The upper part is welded to the bottom of the front track, and the lower part is connected to the pier block. And a transverse limit block is welded at the lower part, and the transverse limit block is fixed to the pier through a steel rod to form a hoop device to improve the lateral stability.

[0030] An auxiliary device for installing a steel box girder by a bridge erecting machine has a simple structure and is easy to operate. It has been specifically implemented in the installation of 27 segments such as the steel box composite beam (3*40m + 40m + 66m + 40m) of the Qingshuihe Extra-large Bridge and the steel box composite beam (3*60m) of the Zhaoyihe Bridge in the reconstruction and expansion project of the G50 G5011 Xuanwu section, and the effect is remarkable.

[0031] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An auxiliary support device for installing a steel box girder by a bridge erecting machine, characterized in that, Comprising: A front track (4), which is horizontally arranged and located below the foremost end of the bridge erecting machine (9); A pair of symmetrically arranged triangular brackets (2), the upper ends of the triangular brackets (2) are fixedly connected to the middle part of the front track (4), and the lower ends of the triangular brackets (2) are in supporting cooperation with the middle part of the capping beam (3); and A pair of symmetrically arranged diagonal bracing brackets (1), the upper ends of the diagonal bracing brackets (1) are fixedly connected to the outer ends of the front track (4), and the lower ends of the diagonal bracing brackets (1) are connected to the capping beam blocks (8) at the left and right ends of the capping beam (3); Wherein, a transverse limiting block (7) is welded to the lower part of the diagonal bracing bracket (1), and the transverse limiting block (7) is in transverse limiting cooperation with the capping beam block (8).

2. The auxiliary support device for installing steel box girders of the bridge erecting machine according to claim 1, wherein, The transverse limiting block (7) and the capping beam block (8) are fixed by a steel bar (6) to form a hoop device.

3. The auxiliary support device for installing steel box girders of a bridge erecting machine according to claim 1, characterized in that, The triangular bracket (2) is welded by profiled steel to form a flat connection + triangular support connection.

4. The auxiliary support device for installing steel box girders of the bridge erecting machine according to claim 3, characterized in that The triangular bracket (2) includes two groups of triangular supports composed of a second vertical beam (21), a pair of second diagonal braces (22), and a second longitudinal beam (23), and also includes a flat connection structure composed of a third diagonal brace (25) and a pair of cross beams (24).

5. The auxiliary support device for installing steel box girders of the bridge erecting machine according to claim 1, characterized in that, The diagonal bracing bracket (1) includes a first vertical beam (11), a first longitudinal beam (13), and a pair of first diagonal braces (12).

6. The auxiliary support device for installing steel box girders of the bridge erection machine according to claim 1, characterized in that, The upper end of the diagonal bracing bracket (1) is welded to the front track (4).

7. The auxiliary support device for installing steel box girders of a bridge erecting machine according to claim 1, characterized in that, The upper end of the triangular bracket (2) is welded to the front track (4).

8. The auxiliary support device for installing steel box girders of a bridge erecting machine according to claim 1, characterized in that, Both the diagonal bracing bracket (1) and the triangular bracket (2) are formed by butt welding 20a channel steels.

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