A device and method for installing a large-segment steel box girder under a high-slope bridge

Abstract

The present invention provides a device and method for installing a large-segment steel box girder under a bridge spanning a high slope. The device includes a hanging basket arranged on a pier column, a mobile beam feeding mechanism placed on a slope platform for feeding beams to the hanging basket, the mobile beam feeding mechanism includes a mobile bracket and a walking mechanism located at the bottom of the mobile bracket, the mobile bracket includes a steel pipe column, a longitudinal load-bearing beam placed on the top of the steel pipe column, a transverse distribution beam placed above the longitudinal load-bearing beam, and a panel laid on the transverse distribution beam. The large-segment steel box girder is placed on the panel. The steel pipe column is provided with at least two rows, each row is provided with at least three, and the steel pipe columns in the same row have different heights and are matched with the slope platform. The present invention meets the requirements for feeding beams in construction through a mobile beam feeding mechanism that adapts to high slopes. The structure is simple and reasonable, the raw materials are easily available, and the processing is convenient. The cost is low, it is convenient to set up at the construction site, the adaptability is wide, and it is not affected by the construction environment. It has a good prospect for promotion and application in the field of slopes.

Description

Technical Field

[0001] The invention relates to the technical field of long-span bridge construction, and in particular to a device and method for installing a large-segment steel box girder under a high-span slope bridge. Background Art

[0002] In the reconstruction and expansion of expressways, in order to reduce the impact of construction on the environment, large-span bridges are often used for spanning across multi-level high-slope sections. Due to the advantages of variable-section steel box girder structures such as light weight, short construction period, and low cost, the application of large-span steel box girders in the field of large-span bridge construction is becoming increasingly common. During the specific construction, since there is no transportation channel in the high-slope section, the large-segment steel box girder cannot be fed into place from the rear of the hanging basket. In the existing technology, a full-revolving crane is often used for installation, but the construction cost of the full-revolving crane is high and the construction is inconvenient, which brings great inconvenience to the entire project. Summary of the invention

[0003] The present invention provides a device and method for installing a large-segment steel box girder under a bridge with a high slope, which can not only meet the needs of feeding large-segment steel box girders, but also reduce construction costs and improve construction efficiency.

[0004] The technical solution of the present invention is: a large-segment steel box girder installation device under a high slope bridge, including a hanging basket arranged on a pier, a mobile beam feeding mechanism placed on a slope platform for feeding beams to the hanging basket, the mobile beam feeding mechanism includes a mobile bracket and a walking mechanism located at the bottom of the mobile bracket, the mobile bracket includes a steel pipe column, a longitudinal load-bearing beam placed on the top of the steel pipe column, a transverse distribution beam placed above the longitudinal load-bearing beam, and a panel laid on the transverse distribution beam, the steel pipe columns are provided with at least two rows, each row is provided with at least three, the steel pipe columns in the same row have different heights, and are matched with the slope platform.

[0005] Furthermore, the transverse distribution beams are evenly arranged above the longitudinal load-bearing beams and are perpendicular to the longitudinal load-bearing beams.

[0006] Furthermore, a parallel connection is provided between two adjacent steel pipe columns.

[0007] Furthermore, diagonal rods are provided between the steel pipe columns.

[0008] Furthermore, the traveling mechanism comprises a self-propelled traveling box placed at the bottom of the steel pipe column and a track placed on each level of the slope platform.

[0009] Furthermore, the self-propelled traveling box includes traveling wheels and a traveling motor.

[0010] Furthermore, the track includes a concrete foundation placed at the bottom and a walking track arranged on the concrete foundation.

[0011] Furthermore, the steel pipe column is provided with a connecting ear plate, and a pin is passed through the connecting ear plate to fix the steel pipe column and the parallel connection.

[0012] In another aspect, the present invention provides a method for installing a large-segment steel box girder under a high-slope bridge, the steps of which include:

[0013] (1) Process the slope platform to make the surface of the multi-level slope platform flat;

[0014] (2) Set up a concrete foundation and a walking track, and set the mobile beam feeding mechanism on the walking track of the slope platform;

[0015] (3) Setting up a large segment steel box girder assembly site at a flat area on the side span of the bridge;

[0016] (4) The large-segment steel box girder is transported from the large-segment steel box girder assembly site to the root of the pier column by a beam transporter, and then the large-segment steel box girder is hoisted to the top of the mobile beam feeding mechanism by a crawler crane and placed stably;

[0017] (5) Open the mobile beam feeding mechanism to transport the large segment steel box beam to the bottom of the projection of the installation position, and lift it to the position by the hanging basket for welding and assembly;

[0018] (6) The mobile beam feeding mechanism returns to the root of the main pier to transport and feed the next large-section steel box beam, and the construction cycle continues until all large-section steel box beams are connected.

[0019] The advantages of the present invention are as follows: the present invention meets the construction beam feeding requirements through a mobile beam feeding mechanism that adapts to high slopes, and the overall device structure is simple and reasonable, the raw materials are easily available, easy to process, low cost, and convenient to set up at the construction site without affecting the normal construction process; and the device of the present invention can be set to different sizes as needed, has a wide range of adaptability, is not affected by the construction environment, is not only suitable for high slopes, but also has a good prospect of promotion and application in other slope fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a large-segment steel box girder installation device under a high-slope bridge according to the present invention;

[0021] Figure 2 This is a structural front view of a large-segment steel box girder installation device under a high-slope bridge according to the present invention;

[0022] Figure 3 It is a side view of the structure of a movable beam feeding mechanism of a large-segment steel box beam installation device under a high-slope bridge of the present invention;

[0023] Among them: 1. Slope platform, 2. Hanging basket, 3. Mobile beam feeding mechanism, 4. Large-section steel box beam, 5. Self-propelled walking box, 6. Steel pipe column, 7. Flat joint, 8. Longitudinal load-bearing beam, 9. Transverse distribution beam, 10. Walking track, 11. Concrete foundation, 12. Diagonal rod. DETAILED DESCRIPTION

[0024] The present invention is described clearly and completely below in conjunction with the accompanying drawings so that those skilled in the art can fully implement the present invention without having to make any creative work.

[0025] The specific implementation mode of the present invention is: Figure 1-3 As shown, a large-segment steel box girder installation device under a bridge across a high slope comprises a hanging basket 2 arranged on a pier, a mobile beam feeding mechanism 3 placed on a slope platform 1 for feeding beams to the hanging basket 2, the mobile beam feeding mechanism 3 comprises a mobile bracket and a walking mechanism located at the bottom of the mobile bracket, the mobile bracket comprises a steel pipe column 6, a longitudinal load-bearing beam 8 placed on the top of the steel pipe column 6, a transverse distribution beam 9 placed above the longitudinal load-bearing beam 8, and a panel laid on the transverse distribution beam 9, a large-segment steel box girder 4 is placed on the panel, the steel pipe column 6 is provided with at least two rows, each row is provided with at least three, the steel pipe columns 6 in the same row have different heights, and cooperate with the slope platform 1, and mobile brackets of different sizes can be provided according to specific circumstances to adapt to different slopes.

[0026] Furthermore, the transverse distribution beams 9 are evenly arranged above the longitudinal load-bearing beams 8 and are perpendicular to the longitudinal load-bearing beams 8 .

[0027] Furthermore, a flat link 7 is provided between two adjacent steel pipe columns 6 to enhance the stability and reliability of the entire mobile bracket.

[0028] Furthermore, oblique rods 12 are provided between the steel pipe columns 6 to further enhance the stability and reliability of the entire mobile bracket.

[0029] Furthermore, the walking mechanism includes a self-propelled walking box 5 placed at the bottom of the steel pipe column 6 and a track placed on each level of the slope platform 1.

[0030] Furthermore, the self-propelled traveling box 5 includes traveling wheels and a traveling motor.

[0031] Furthermore, the track includes a concrete foundation 11 placed at the bottom and a running track 10 arranged on the concrete foundation 11, and the running track 10 is made of I-shaped steel.

[0032] Furthermore, the steel pipe column 6 is provided with a connecting ear plate, and a pin is passed through the connecting ear plate to fix the steel pipe column 6 and the parallel link 7, so as to facilitate installation and disassembly.

[0033] In another aspect, the present invention provides a method for installing a large-segment steel box girder under a high-slope bridge, the steps of which include:

[0034] (1) Processing the slope platform 1 so that the surface of the multi-level slope platform 1 is flat;

[0035] (2) Setting a concrete foundation 11 and a travel track 10, and setting the mobile beam feeding mechanism 3 on the travel track 10 of the slope platform 1;

[0036] (3) Setting up a large segment steel box girder 4 assembly site at a flat area on the side span of the bridge;

[0037] (4) The large-segment steel box girder 4 is transported from the large-segment steel box girder assembly site to the root of the pier column by a beam transport vehicle, and then the large-segment steel box girder 4 is hoisted to the top of the mobile beam feeding mechanism 3 by a crawler crane and placed stably;

[0038] (5) The mobile beam feeding mechanism 3 is opened to transport the carried large segment steel box beam 4 to the bottom of the projection of the installation position, and the hanging basket 2 is used to lift the beam to the position for welding and assembly;

[0039] (6) The mobile beam feeding mechanism 3 returns to the root of the main pier to transport and feed the next large-section steel box girder 4, and the construction cycle is repeated until all large-section steel box girders 4 are connected.

[0040] The preferred embodiments of the present invention are described above. It should be pointed out that the present invention is not limited to the above-mentioned specific embodiments, and the devices and structures not described in detail should be understood to be implemented in a common manner in the art; any simple modifications, equivalent changes and modifications made to the above embodiments by any technician familiar with the art based on the technical essence of the present invention without departing from the scope of the technical solution of the present invention, shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A large-segment steel box girder installation device under a high-slope bridge, characterized in that: The invention comprises a hanging basket (2) arranged on a pier column, a mobile beam feeding mechanism (3) arranged on a slope platform (1) for feeding beams to the hanging basket (2), the mobile beam feeding mechanism (3) comprising a mobile support and a walking mechanism located at the bottom of the mobile support, the mobile support comprising a steel pipe column (6), a longitudinal load-bearing beam (8) arranged on the top of the steel pipe column (6), a transverse distribution beam (9) arranged above the longitudinal load-bearing beam (8), and a panel laid on the transverse distribution beam (9), a large-segment steel box beam (4) being placed on the panel, and the steel pipe column (6) comprising a longitudinal load-bearing beam (8) arranged on the top of the longitudinal load-bearing beam (8), and a transverse distribution beam (9) arranged on the transverse distribution beam (9). The columns (6) are arranged in at least two rows, with at least three columns in each row. The steel pipe columns (6) in the same row have different heights and are matched with the slope platform (1). The walking mechanism comprises a self-propelled walking box (5) arranged at the bottom of the steel pipe columns (6) and a track arranged on each level of the slope platform (1). The self-propelled walking box (5) comprises walking wheels and a walking motor. The track comprises a concrete foundation (11) arranged at the bottom and a walking track (10) arranged on the concrete foundation (11), and the walking track (10) is made of I-shaped steel.

2. The large-segment steel box girder installation device under a high-slope bridge according to claim 1 is characterized in that: The transverse distribution beams (9) are evenly arranged above the longitudinal load-bearing beams (8) and are perpendicular to the longitudinal load-bearing beams (8).

3. The large-segment steel box girder installation device under a high-slope bridge according to claim 2 is characterized in that: A parallel connection (7) is provided between two adjacent steel pipe columns (6).

4. The large-segment steel box girder installation device under a high-slope bridge according to claim 3 is characterized in that: Diagonal rods (12) are also provided between the steel pipe columns (6).

5. The large-segment steel box girder installation device under a high-slope bridge according to claim 4 is characterized in that: The steel pipe column (6) is provided with a connecting ear plate, and a pin is passed through the connecting ear plate to fix the steel pipe column (6) and the parallel link (7).

6. A method for installing the device according to any one of claims 1 to 5, characterized in that: The steps include: (1) processing the slope platform (1) so that the surface of the multi-level slope platform (1) is flat; (2) setting a concrete foundation (11) and a walking track (10), and setting a mobile beam feeding mechanism (3) on the walking track (10) of the slope platform (1); (3) Setting up large segment steel box girders at the flat part of the bridge side span (4) Assembly site; (4) The large-segment steel box girder (4) is transported from the large-segment steel box girder assembly site to the base of the pier column by a beam transport vehicle, and then the large-segment steel box girder (4) is hoisted to the top of the mobile beam feeding mechanism (3) by a crawler crane and placed stably; (5) The mobile beam feeding mechanism (3) is opened to transport the carried large segment steel box beam (4) to the bottom of the projection of the installation position, and the hanging basket (2) is used to lift the beam to the position for welding and assembly; (6) The mobile beam feeding mechanism (3) returns to the root of the main pier to transport and feed the next large-segment steel box girder (4), and the construction cycle continues until all large-segment steel box girders (4) are connected.

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