Construction device suitable for double-amplitude box girder

Abstract

The utility model discloses a construction device suitable for a double-amplitude box girder, which comprises a bottom support, a first distributive girder, a sliding structure, a second distributive girder, a bailey girder truss and a template structure, the bottom of the bottom support is arranged on a bearing platform and beside a pier body, the first distributive girder is arranged at the top of the bottom support, and the second distributive girder is arranged at the bottom of the bottom support. A sliding structure and a second distribution beam are sequentially arranged on the first distribution beam from bottom to top, a plurality of bailey beam trusses are arranged on the two second distribution beams on the two adjacent bearing platforms, and a formwork structure is arranged between the upper faces of the bailey beam trusses and the bottom of the box beam. According to the utility model, the bailey beam truss is supported by the bottom bracket arranged on the bearing platform; the sliding structure arranged at the top of the first distribution beam enables the second distribution beam, the bailey beam truss and the formwork structure to integrally slide to the bottom of the other box beam after construction of the single box beam is completed. The utility model has the advantages of less steel consumption, short construction period, low cost and small safety risk, and the construction quality can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of simply supported beam construction, in particular to a construction device suitable for double-width box beams. Background Art

[0002] The newly constructed Jingmen-Jingzhou Railway is located in the Hanjiang Plain in central Hubei Province. Pier spans 492#-495# utilize 32.7m simply supported variable-section box girders, transforming the line from two to four lanes. The box girders are arranged in separate left and right spans. The simply supported girders for piers 492#-495# are cast in-situ, one span per span, for a total of six spans. The beams feature a single-box, single-chamber, inclined web structure with uniform height. Existing double-span box girders are typically cast in stages using a floor-mounted scaffolding method. However, conventional floor-mounted scaffolding construction consumes a significant amount of steel, resulting in a long construction period, high construction costs, significant safety risks, and difficulty ensuring quality. Summary of the Invention

[0003] The purpose of the utility model is to provide a construction device suitable for double-width box beams.

[0004] The purpose of this utility model is achieved in this way:

[0005] A construction device suitable for double-span box girders is characterized by comprising a bottom support, a first distribution beam, a sliding structure, a second distribution beam, a Bailey beam truss and a template structure. The bottom of the bottom support is arranged on a pedestal and next to the pier body, the first distribution beam is arranged on the top of the bottom support, the sliding structure and the second distribution beam are arranged on the top of the first distribution beam in sequence from bottom to top, a plurality of Bailey beam trusses are arranged on the two second distribution beams on two adjacent pedestals, and a template structure is arranged between the top of the Bailey beam truss and the bottom of the box girder.

[0006] Preferably, the sliding structure consists of a sand barrel, a transverse movement device, a transverse connecting rod, a vertical jack and a slider. A sand barrel is installed on the left side of the first distribution beam, and a vertical jack is installed on the left and right sides of the sand barrel on the first distribution beam. Several transverse connecting rods and sliders are installed at intervals between the first distribution beam and the second distribution beam. Several transverse connecting rods and sliders are placed on the left and right sides of the sand barrel and the jack respectively. Several transverse connecting rods connect the slider into a whole. A transverse movement device is installed on the right end of the first distribution beam. The transverse movement device is connected to the rightmost transverse connecting rod connected into a whole through a steel wire rope. The transverse movement device drags the steel wire rope to drive the slider, the transverse connecting rod, the second distribution beam, the Bailey beam truss and the template structure to slide along the first distribution beam, thereby achieving the function of transverse sliding.

[0007] Preferably, the bottom support arrangement range should meet the construction requirements of double-width box girders and form a symmetrical arrangement below the first distribution beam.

[0008] Preferably, the length of the first distribution beam is greater than the width of the double-width box beam.

[0009] Preferably, the transverse movement device is a horizontal jack or a winch.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] The utility model adopts a sliding structure. After the construction of a single box girder is completed, the second distribution beam, Bailey beam truss and formwork structure can be slid as a whole to the bottom of the other box girder, avoiding the large amount of steel consumed by traditional floor-standing brackets, saving a lot of costs, improving construction efficiency, and also improving construction quality and safety.

[0012] The utility model has the advantages of less steel consumption, short construction period, low construction cost, small safety risk and guaranteed construction quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic elevation diagram of the utility model;

[0014] Figure 2 It is a side schematic diagram of the utility model;

[0015] Figure 3 This is a schematic elevation diagram of the sliding structure of the present utility model;

[0016] In the figure: 1. Bottom support; 2. First distribution beam; 3. Sliding structure; 4. Second distribution beam; 5. Bailey beam truss; 6. Formwork structure; 7. Cap; 8. Pier body; 9. Box beam; 10. Sand cylinder; 11. Transverse movement device; 12. Transverse connecting rod; 13. Jack; 14. Slider. DETAILED DESCRIPTION

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0018] A construction device suitable for double-span box girders includes a bottom support 1, a first distribution beam 2, a sliding structure 3, a second distribution beam 4, a Bailey beam truss 5 and a formwork structure 6. The bottom of the bottom support 1 is arranged on a pedestal 7 and next to a pier body 8. The first distribution beam 2 is arranged on the top of the bottom support 1. The sliding structure 3 and the second distribution beam 4 are arranged in sequence from bottom to top on the first distribution beam 2. Several Bailey beam trusses 5 are arranged on the two second distribution beams 4 on two adjacent pedestals 7. A formwork structure 6 is arranged between the top of the Bailey beam truss 5 and the bottom of the box girder 9.

[0019] The sliding structure 3 consists of a sand barrel 10, a transverse moving device 11, a transverse connecting rod 12, a vertical jack 13 and a slider 14. A sand barrel 10 is installed on the left side of the first distribution beam 2, and a jack 13 is installed on the left and right sides of the sand barrel 10 on the first distribution beam 2. Several transverse connecting rods 12 and sliders 14 are installed at intervals between the first distribution beam 2 and the second distribution beam 4. Several transverse connecting rods 12 and sliders 14 are placed on the left and right sides of the sand barrel 10 and the jack 13 respectively. Several transverse connecting rods 12 connect the slider 14 into a whole. A transverse moving device 11 is installed on the right end of the first distribution beam 2. The transverse moving device 11 is connected to the rightmost transverse connecting rod 12 connected into a whole through a steel wire rope. The transverse moving device 11 drags the steel wire rope to drive the slider 14, the transverse connecting rod 12, the second distribution beam 4, the Bailey beam truss 5 and the formwork structure 6 to slide along the first distribution beam 2, thereby achieving the function of transverse sliding.

[0020] The arrangement range of the bottom support 1 should meet the construction requirements of the double-width box girder and form a symmetrical arrangement below the first distribution beam 2.

[0021] The length of the first distribution beam 2 is greater than the width of the double-width box beam 9 .

[0022] The transverse movement device 11 is a horizontal jack or a winch.

[0023] Working principle:

[0024] 1. Fix the bottom bracket 1 on the caps 7 at both ends of the double-width box girder 9. The bottom bracket 1 supports the Bailey beam truss 5 through the first distribution beam 2, the sliding structure 3, and the second distribution beam 4. Install the formwork structure 6 on the Bailey beam truss 5, and then construct the single box girder 9 on the formwork structure 6.

[0025] 2. After the construction of a single box girder 9 is completed, first remove part of the formwork structure 6, use the sand drum 10 to drop the second distribution beam 4, Bailey beam truss 5 and formwork structure 6 to the top of the slider 14, and then use the sliding structure 3 to move the second distribution beam 4, Bailey beam truss 5 and formwork structure 6 to the designed position of the other box girder 9;

[0026] 3. Use the jack 13 to lift the second distribution beam 4, Bailey beam truss 5 and formwork structure 6, install the sand cylinder 10, and adjust the second distribution beam 4, Bailey beam truss 5 and formwork structure 6 to the designed elevation;

[0027] 4. After acceptance, pre-press to eliminate inelastic deformation and adjust elevation to meet design requirements;

[0028] 5. Install the previously removed formwork structure 6, tie the steel bars, and pour the box beam concrete to obtain another box beam 9;

[0029] Although the present invention is disclosed as above, it is not limited thereto. Any person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope defined by the claims.

Claims

1. A construction device suitable for double-width box girders, characterized by: It includes a bottom bracket, a first distribution beam, a sliding structure, a second distribution beam, a Bailey beam truss and a formwork structure. The bottom of the bottom bracket is arranged on the pedestal and next to the pier body. The first distribution beam is arranged on the top of the bottom bracket. The sliding structure and the second distribution beam are arranged on the top of the first distribution beam from bottom to top. Several Bailey beam trusses are arranged on the two second distribution beams on two adjacent pedestals. A formwork structure is arranged between the top of the Bailey beam truss and the bottom of the box beam.

2. The construction device for double-width box beams according to claim 1, characterized in that: The sliding structure consists of a sand barrel, a transverse movement device, a transverse connecting rod, a vertical jack and a slider. A sand barrel is installed on the left side of the first distribution beam. A vertical jack is installed on the left and right sides of the sand barrel on the first distribution beam. Several transverse connecting rods and sliders are installed at intervals between the first distribution beam and the second distribution beam. Several transverse connecting rods and sliders are placed on the left and right sides of the sand barrel and the jack respectively. Several transverse connecting rods connect the slider into a whole. A transverse movement device is installed on the right end of the first distribution beam. The transverse movement device is connected to the rightmost transverse connecting rod connected to the whole through a wire rope.

3. The construction device for double-width box beams according to claim 1, characterized in that: The bottom brackets are symmetrically arranged below the first distribution beam.

4. The construction device for double-width box beams according to claim 1, characterized in that: The length of the first distribution beam is greater than the width of the double-width box beam.

5. The construction device for double-width box beams according to claim 1, characterized in that: The transverse movement device is a horizontal jack or a winch.

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