Existing overcrossing railway steel box girder pushing and rotating structure system

Abstract

The utility model relates to an over-crossing existing railway steel box girder pushing and rotating structure system which comprises an existing railway track, a steel box girder, a rotating pier, a movable temporary support, a translation steel plate platform, an upper rotating disc and a lower rotating disc. A pile foundation is arranged on the lower portion of the lower rotary disc, a rotary table is arranged above the lower rotary disc, an upper rotary disc is arranged on the rotary table, a rotary pier is arranged on the upper rotary disc, a temporary consolidation steel column is arranged on the upper portion of the rotary pier and used for fixing a steel box girder, a movable temporary support is arranged on one side of the steel box girder, and the steel box girder is supported through the movable temporary support. The device can effectively improve the construction speed of the steel box girder of the overpass existing railway, improves the construction quality, and can obtain better technical and economic benefits when being applied to actual engineering.

Description

Technical Field

[0001] The utility model relates to a jacking and rotation structural system of a steel box girder that crosses an existing railway, belongs to the field of civil engineering, and is suitable for the construction of a steel box girder structure that crosses an existing railway. Background Art

[0002] Bridge rotation construction technology has been widely used in the construction of overpasses due to its many advantages such as convenient construction, safety and reliability, and small impact range. The rotation construction technology has great technical advantages in reducing the impact on operating line operations, which are mainly manifested in: greatly reducing the interference with the safety of railway operation; greatly reducing the workload of supervision and monitoring of the engineering workshop team; and at the same time, it can provide strong safety guarantees for existing railway operations.

[0003] However, the construction of conventional steel box girder rotation structures is prone to the following problems: poor overall stability of the steel box girder rotation structure and poor safety protection effect. Summary of the invention

[0004] The utility model aims to solve the problem of construction of steel box girders over existing railways and provide a top-pushing and rotation structural system for steel box girders over existing railways to meet the needs of structural construction.

[0005] In order to achieve the above technical objectives, the utility model adopts the following technical solutions: a top-pushing and rotating structural system of an existing railway steel box girder, including an existing railway track, a steel box girder, a rotating pier, a movable temporary support, a translational steel plate platform, an upper turntable, and a lower turntable; a pile foundation is provided at the lower part of the lower turntable, a turntable is provided above the lower turntable, an upper turntable is provided on the turntable, a rotating pier is provided on the upper turntable, a temporary consolidation steel column is provided on the upper part of the rotating pier, the temporary consolidation steel column is used to fix the steel box girder, a movable temporary support is provided on one side of the steel box girder, and the steel box girder is supported by the movable temporary support.

[0006] Preferably, a translational steel plate platform is provided at the lower part of the movable temporary support, the translational steel plate platform is provided on the concrete pavement, and a cushion layer is provided under the concrete pavement.

[0007] Preferably, the movable temporary support includes a bottom crossbeam, columns and a top crossbeam. The bottom crossbeam is arranged on a translation steel plate platform. A reaction pier is arranged on one side of the bottom crossbeam. A translation jack is arranged between the reaction pier and the bottom crossbeam. The columns are arranged on the bottom crossbeam, and the top crossbeam is arranged at the upper end of the columns. The steel box beam is placed above the top crossbeam. A sand box, a support block and a jack are arranged on the top of the top crossbeam. The support block is arranged at the upper end of the sand box. The steel box beam is supported by the sand box, the support block and the jack.

[0008] Preferably, a pull ring and a steel wire rope are provided on the upper part of the top cross beam to fix the steel box beam; the pull ring is fixedly provided at the upper end of the top cross beam, one end of the steel wire rope is connected to the pull ring, and the other end of the steel wire rope is connected to the steel box beam.

[0009] Preferably, the movable temporary support further includes an oblique brace and a middle cross beam, and the middle cross beam and the oblique brace are arranged between the columns.

[0010] The present invention has the following characteristics and beneficial effects:

[0011] (1) Use movable temporary supports to support and tighten the lower part of the steel box girder during the rotation construction, improve the overall stability of the steel box girder rotation construction structure, and ensure the safety of the steel box girder conversion construction;

[0012] (2) Use movable temporary supports to assemble, push and rotate the steel box girder to improve the construction efficiency of the steel box girder. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a diagram of a steel box girder that spans over an existing railway;

[0014] Figure 2 This is a structural diagram of a movable temporary support.

[0015] In the figure: 1, existing railway track; 2, rotating pier; 3, temporary consolidation steel column; 4, steel box girder; 5, concrete pavement; 6, cushion layer; 7, translation steel plate platform; 8, movable temporary support; 9, lower turntable; 10, pile foundation; 11, turntable; 12, upper turntable; 13, translation jack; 14, reaction pier; 15, pull ring; 16, wire rope; 17, jack; 18, support block; 19, sand box; 20, top beam; 21, middle beam; 22, column; 23, diagonal brace; 24, bottom beam. DETAILED DESCRIPTION

[0016] The construction technical requirements such as structural connection in the implementation mode of the utility model will not be repeated here, and the implementation mode of the utility model will be explained in detail below with reference to the drawings and examples, which are not limited to the following examples.

[0017] like Figure 1 to Figure 2As shown, a jacking and swivel structural system for a steel box girder that crosses an existing railway includes an existing railway track 1, a steel box girder 4, a swivel pier 2, a movable temporary support 8, a translation steel plate platform 7, an upper turntable 12, and a lower turntable 9; the assembly and jacking construction of the steel box girder 4 are completed on one side of the existing railway track 1, the lower turntable 9 is arranged on one side of the existing railway track 1, a pile foundation 10 is driven at the lower part of the lower turntable 9, a turntable 11 is arranged above the lower turntable 9, an upper turntable 12 is arranged on the turntable 11, a swivel pier 2 is arranged on the upper turntable 12, a temporary consolidation steel column 3 is arranged on the upper part of the swivel pier 2, the temporary consolidation steel column 3 is used to fix the steel box girder 4, a movable temporary support 8 is arranged on one side of the steel box girder 4, the steel box girder 4 is supported by the movable temporary support 8, a translation steel plate platform 7 is arranged at the lower part of the movable temporary support 8, the translation steel plate platform 7 is arranged on the concrete pavement 5, and a cushion layer 6 is arranged below the concrete pavement 5.

[0018] like Figure 2 As shown, the movable temporary support 8 includes a bottom crossbeam 24, a diagonal brace 23, a column 22, a middle crossbeam 21 and a top crossbeam 20. The bottom crossbeam 24 is arranged on the translation steel plate platform 7. A reaction pier 14 is arranged on one side of the bottom crossbeam 24. A translation jack 13 is arranged between the reaction pier 14 and the bottom crossbeam 24. The columns 22 are arranged on the bottom crossbeam 24, and the top crossbeam 20 is arranged at the upper end of the columns 22; the middle crossbeam 21 and the diagonal brace 23 are arranged between the columns 22; the steel box beam 4 is placed above the top crossbeam 20, and a sand box 19, a support block 18 and a jack 17 are arranged on the top of the top crossbeam 20, wherein the support block 18 is arranged at the upper end of the sand box 19, and the steel box beam 4 is supported by the sand box 19, the support block 18 and the jack 17.

[0019] A pull ring 15 and a steel wire rope 16 are arranged on the top cross beam 20 to fix the steel box beam. The pull ring 15 is fixedly arranged on the upper end of the top cross beam 20, one end of the steel wire rope 16 is connected to the pull ring 15, and the other end of the steel wire rope 16 is connected to the steel box beam 4.

Claims

1. A top-pushing and rotating structural system for steel box girders that cross existing railways, characterized in that: The invention comprises an existing railway track (1), a steel box girder (4), a rotating pier (2), a movable temporary support (8), a translation steel plate platform (7), an upper turntable (12), and a lower turntable (9); a pile foundation (10) is arranged at the lower part of the lower turntable (9); a turntable (11) is arranged above the lower turntable (9); an upper turntable (12) is arranged on the turntable (11); a rotating pier (2) is arranged on the upper turntable (12); a temporary consolidation steel column (3) is arranged on the upper part of the rotating pier (2); the temporary consolidation steel column (3) is used to fix the steel box girder (4); a movable temporary support (8) is arranged on one side of the steel box girder (4); and the steel box girder (4) is supported by the movable temporary support (8).

2. The jacking and rotation structural system for steel box girders over existing railways according to claim 1 is characterized in that: A translation steel plate platform (7) is arranged at the lower part of the movable temporary support (8), and the translation steel plate platform (7) is arranged on the concrete pavement (5), and a cushion layer (6) is arranged below the concrete pavement (5).

3. The jacking and rotation structural system for steel box girders over existing railways according to claim 1 is characterized in that: The movable temporary support (8) comprises a bottom cross beam (24), a column (22) and a top cross beam (20), wherein the bottom cross beam (24) is arranged on the translation steel plate platform (7), a reaction pier (14) is arranged on one side of the bottom cross beam (24), a translation jack (13) is arranged between the reaction pier (14) and the bottom cross beam (24), the column (22) is arranged on the bottom cross beam (24), and the top cross beam (20) is arranged at the upper end of the column (22); the steel box beam (4) is placed above the top cross beam (20), a sand box (19), a support block (18) and a jack (17) are arranged on the top of the top cross beam (20), and the support block (18) is arranged at the upper end of the sand box (19), and the steel box beam (4) is supported by the sand box (19), the support block (18) and the jack (17).

4. The jacking and rotation structural system for steel box girders over existing railways according to claim 3 is characterized in that: A pull ring (15) and a steel wire rope (16) are arranged on the upper part of the top cross beam (20) to fix the steel box beam; the pull ring (15) is fixedly arranged on the upper end of the top cross beam (20), one end of the steel wire rope (16) is connected to the pull ring (15), and the other end of the steel wire rope (16) is connected to the steel box beam (4).

5. The jacking and rotation structural system for steel box girders over existing railways according to claim 3 is characterized in that: The movable temporary support (8) further comprises an oblique support (23) and a middle cross beam (21), wherein the middle cross beam (21) and the oblique support (23) are arranged between the upright posts (22).

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