Main and auxiliary truss combined steel truss bridge deck block assembling jig frame

Abstract

The utility model relates to a main and auxiliary truss combined steel truss bridge deck block assembly jig frame, a middle stand column is arranged in the middle of the jig frame, and transverse connecting plates are arranged on the two sides of the middle stand column; transverse connecting plates are arranged on the inner sides of the side stand columns and connected with splice plates through bolts, the splice plates are welded to the middle bridge deck block cross beams, the outer sides of the side stand columns are connected with inclined struts, and the splice plates are welded to the side bridge deck block cross beams. The utility model has the advantages that: firstly, the synchronous assembly operation of the middle bridge floor block and the two side bridge floor blocks can be realized, the production efficiency is improved, the field is reasonably utilized, the number of upright posts is reduced by one third, the steel consumption for manufacturing the jig is reduced, and the manufacturing cost is saved; 2, the overall transverse pre-camber of the two kinds of bridge floor blocks can be accurately controlled and adjusted, so that the overall bridge forming line shape meets the design and requirements; and thirdly, the jig frame is simple in structure, safe, stable and high in operability, can meet the requirements of component precision and quality control and the requirements of mass production under the condition of mass production, particularly under the conditions of short construction period and heavy tasks, and has very high popularization value.

Description

Technical Field

[0001] The utility model relates to the application of a main and auxiliary truss combined steel truss girder bridge deck block assembling falsework in a long-span railway-highway dual-deck main and auxiliary truss combined steel truss girder bridge, belonging to the field of steel bridge manufacturing. Background Technique

[0002] CN219157425U, named "a falsework for assembling the bridge deck plates of a main and auxiliary truss combined steel truss girder cable-stayed bridge", includes a number of support longitudinal beams arranged in parallel at equal intervals, with the center line of one support longitudinal beam in the middle coinciding with the longitudinal baseline of the bridge deck plate, and two support longitudinal beams arranged in parallel at equal intervals outside the outermost two support longitudinal beams; support plates are provided at the top ends of the support longitudinal beams, and the horizontal connection line at the top ends of the support plates is a curve with a higher middle and lower ends, and the radian of the curve is consistent with the transverse pre-camber of the bridge deck plate; columns are provided at the top ends of the support longitudinal beams, and the spacing between the columns is consistent with the spacing of the cross beams of the bridge deck plate; transverse connecting plates are provided inside the columns, and bolt hole groups are arranged on the transverse connecting plates, and the bolt hole groups match the bolt hole groups at the ends of the cross beams of the bridge deck plate. According to this assembling falsework for production, two independent pre-assembling falseworks need to be manufactured, which is easily restricted by the manufacturing site, and the transverse pre-camber of the entire bridge deck cannot be accurately controlled and adjusted, making the bridge alignment difficult to meet the design requirements. Summary of the Invention

[0003] Design purpose: To avoid the deficiencies in the background technique, design a main and auxiliary truss combined steel truss girder bridge deck block assembling falsework that can not only meet the assembling operations of the middle bridge deck blocks and the two side bridge deck blocks, but also accurately control and adjust the transverse pre-camber of the bridge deck, synchronously remove the two types of bridge deck blocks from the falsework, reduce the manufacturing difficulty of the bridge deck blocks, improve production efficiency, rationally utilize the site, reduce the steel consumption for manufacturing the falsework, save manufacturing costs, improve the overall stability of the falsework, ensure construction safety, and can meet the requirements for component precision and quality control under large-scale production conditions, especially under the conditions of tight construction period and heavy tasks, as well as the needs of batch production.

[0004] Design scheme: To achieve the above design purpose. The steel truss girder manufacturing project of Chongqing Baijusi Yangtze River Bridge relied on by the utility model has a "reverse trapezoid" cross-section for the steel truss girder, adopts a form of combination of the main truss and the auxiliary truss, with a novel structural form, uses a connection method combining bolting and welding, and the connection relationship of the members is very complex, with a large difference from the previous double-deck steel truss girders. The upper highway bridge deck includes the middle bridge deck blocks, the top plates of the upper chord members, and two side bridge deck blocks. The upper chord members, as part of the bridge deck, have high matching accuracy requirements with the bridge deck. The bridge deck blocks are composed of orthotropic steel bridge decks and cross beams.

[0005] The assembling jig for the main and secondary truss combined steel truss girder bridge deck block includes side columns. A transverse connecting plate is provided inside the side columns, and a bolt hole group is arranged on the transverse connecting plate. The bolt hole group is matched with the splicing plate hole group arranged at the end of the cross beam of the side bridge deck block. The splicing plate is welded to the cross beam of the side bridge deck block and bolted to the transverse connecting plate. The outside of the side columns is connected to the diagonal braces. In the middle of the jig, there is an intermediate column. Transverse connecting plates are provided on both sides of the intermediate column, and a bolt hole group is arranged on the transverse connecting plate. The bolt hole group is matched with the splicing plate hole groups arranged at the ends of the cross beams of the side bridge deck block and the intermediate bridge deck block. The splicing plate is welded to the cross beam of the intermediate bridge deck block. At the bottom of the cross beams of the side bridge deck block and the intermediate bridge deck block, there are piers. The center line of the top of the piers at the center line position of the jig coincides with the longitudinal baseline of the intermediate bridge deck block. A tooth plate is provided at the top of each pier. The elevation of the tooth plate can be adjusted up and down in the card slot at the top of the pier. And the horizontal connecting line at the top of the tooth plate is a curve with the middle high and both ends low. And the radian of the curve is consistent with the transverse camber of the bridge deck block. And for the cross beam of the intermediate bridge deck block, except at both ends and the middle, 2 support points are added according to the span. The positions of the support points are at the stiffer parts below the vertical stiffeners of the cross beam to accurately control the transverse camber. At the bottom of both ends of the cross beam of the side bridge deck block, there are piers. The elevation of the tooth plate at the top of the pier is associated with the elevation of the tooth plate at the bottom of the intermediate bridge deck block. The elevation difference is determined according to the value obtained from the computer-simulated camber curve.

[0006] Further, the bases of the side columns, intermediate columns, piers, and diagonal braces are bolted to the hardened ground through expansion bolts.

[0007] Further, the side columns, intermediate columns, and piers are all welded with the bases using erected H-shaped steel, and the longitudinal spacing is set to be the same as the spacing of the cross beams of the bridge deck block.

[0008] Further, longitudinal connecting channel steels are provided between the side columns and between the intermediate columns. The position of the longitudinal connecting channel steel is at 2 / 3 of the height of the vertical column, and the connecting channel steel is welded to the column.

[0009] Further, the transverse baselines of the side bridge deck block and the intermediate bridge deck block are on the same straight line. The longitudinal baselines of the side bridge deck block and the intermediate bridge deck block are parallel, and the spacing between the longitudinal baselines is equal.

[0010] Further, the hole-making process of the post-hole method is adopted for the cross beam unit to ensure the matching accuracy with the chord. A splicing plate is provided at the end of the cross beam. After the elevation of the cross beam is adjusted, the splicing plate is welded and fixed to the cross beam.

[0011] Compared with the background technology, the utility model has the following advantages: First, it can realize the synchronous assembly operation of the middle bridge deck block and the two side bridge deck blocks, improve production efficiency, rationally utilize the site, reduce the number of columns by one-third, reduce the steel consumption for manufacturing the falsework, and save the manufacturing cost. Second, it can accurately control and adjust the overall transverse pre-camber of the two types of bridge deck blocks, so that the overall bridge alignment meets the design requirements. Third, the falsework structure is simple, safe and stable, and has strong operability. It can meet the requirements of component precision and quality control, as well as the needs of mass production under large-scale production conditions, especially when the construction period is tight and the task is heavy, and has high popularization value. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a front elevation view of the falsework for assembling the bridge deck block.

[0013] Figure 2 It is a plan layout view of the falsework for assembling the bridge deck block.

[0014] Figure 3 It is an assembly diagram of the side column.

[0015] Figure 4 It is an assembly diagram of the fulcrum column.

[0016] Figure 5 It is an assembly diagram of the middle column.

[0017] Figure 6 It is an assembly diagram of the longitudinal connection of the columns. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Embodiment 1: Please refer to Figure 1-6。A block assembly jig for the steel truss girder bridge deck with combined main and secondary girders is characterized in that: an intermediate column 5 is provided in the middle of the jig, and transverse connecting plates 7 are provided on both sides of the intermediate column 5; transverse connecting plates 7 are provided on the inner sides of the side columns 3, the transverse connecting plates 7 are connected to the splicing plates 8, the splicing plates 8 are welded to the cross beams of the intermediate bridge deck block 2, the outer sides of the side columns 3 are connected to the diagonal braces 6, and the splicing plates 8 are welded to the cross beams of the side bridge deck block 1. Bolt hole groups are provided on the transverse connecting plates 7, and the bolt hole groups are matched with the hole groups of the splicing plates 8 provided at the ends of the cross beams of the side bridge deck blocks. The bolt hole groups are matched with the hole groups of the splicing plates 8 provided at the ends of the cross beams of the side bridge deck block 1 and the intermediate bridge deck block 2. Supporting piers 4 are provided at the bottoms of the cross beams of the side bridge deck block 1 and the intermediate bridge deck block 2, and the top center line of the supporting piers 4 at the center line position of the jig coincides with the longitudinal baseline of the intermediate bridge deck block 2. Tooth plates 9 are provided at the tops of the supporting piers 4, and the elevation of the tooth plates 9 can be adjusted up and down in the card slots at the tops of the supporting piers 4, and the horizontal connecting line at the top of the tooth plates 9 is a curve with the middle high and the two ends low. The radian of the curve is consistent with the transverse camber of the bridge deck block. Two support points are added according to the span at the bottom of the cross beam of the intermediate bridge deck block 2 except at both ends and the middle. The positions of the support points are below the vertical stiffeners of the cross beam. Supporting piers 4 are provided at the bottoms of both ends of the cross beam of the side bridge deck block 1, and the elevation of the tooth plate at the top of the supporting pier is associated with the elevation of the tooth plate at the bottom of the intermediate bridge deck block, and the elevation difference is determined according to the value obtained from the computer-simulated camber curve.

[0019] Measures for implementation: To ensure the implementation effect of this technology, the following measures are taken for control:

[0020] 1) The base is bolted to the ground with M20 expansion bolts, and the ground bearing capacity should not be less than 40 KPa;

[0021] 2) After the cross beam is positioned, measures such as clamping and fixing should be taken to prevent it from tipping over;

[0022] 3) To ensure the structural stability and safety, the columns are longitudinally connected with channel steel 10, and safety signs are set at the tops of the columns to avoid bumping;

[0023] 4) Permanent level control points are set up on the stable ground outside the jig, and the settlement of the jig is monitored regularly. The elevation difference between the support points of the single-block jig is not more than 1.5 mm, and the whole jig is not more than 3 mm;

[0024] 5) The elevation of the cross beam is adjusted by moving the tooth plate up and down. After passing the inspection, it is welded to the jig to ensure the alignment and stability of the cross beam.

[0025] The above content is a further detailed description of the present utility model in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model belongs, without departing from the concept of the present utility model, several simple deductions or substitutions can still be made, which should all be regarded as belonging to the protection scope of the present utility model.

[0026] It should be understood that although the above embodiments have made a relatively detailed written description of the design concept of the present utility model, these written descriptions are only simple written descriptions of the design concept of the present utility model, rather than limitations on the design concept of the present utility model. Any combination, addition, or modification that does not exceed the design concept of the present utility model falls within the protection scope of the present utility model.

Claims

1. A main and secondary truss combined with a steel truss bridge deck block assembly frame, characterized by: An intermediate column (5) is provided in the middle of the tire frame, and transverse connecting plates (7) are provided on both sides of the intermediate column (5); a transverse connecting plate (7) is provided on the inner side of the side column (3), the transverse connecting plate (7) is connected to a splicing plate (8), the splicing plate (8) is welded to a cross beam of the intermediate bridge deck block (2), the outer side of the side column (3) is connected to a diagonal brace (6), and the splicing plate (8) is welded to a cross beam of the side bridge deck block (1).

2. The main and secondary trusses combined with steel truss bridge deck block assembly frame according to claim 1 is characterized by: The transverse connecting plate (7) is provided with a group of bolt holes, and the group of bolt holes matches the group of holes of the splicing plate (8) provided on the end of the side bridge deck block cross beam.

3. The main and secondary trusses combined with steel truss bridge deck block assembly frame according to claim 2 is characterized by: The bolt hole groups match the hole groups of the splicing plates (8) provided on the ends of the cross beams of the side bridge deck blocks (1) and the middle bridge deck blocks (2).

4. The main and secondary trusses combined with steel truss bridge deck block assembly frame according to claim 1 is characterized by: The bottom of the cross beams of the side bridge deck blocks (1) and the middle bridge deck blocks (2) are provided with piers (4), and the top center line of the piers (4) at the center line position of the tire frame coincides with the longitudinal baseline of the middle bridge deck block (2).

5. The main and secondary trusses combined with steel truss bridge deck block assembly frame according to claim 1 is characterized by: The top of the pier (4) is provided with a tooth plate (9), the elevation of the tooth plate (9) can be adjusted up and down in a slot at the top of the pier (4), and the transverse connecting line at the top of the tooth plate (9) is a curve that is high in the middle and low at both ends.

6. The main and secondary trusses combined with steel truss bridge deck block assembly frame according to claim 5 is characterized by: The curvature of the curve is consistent with the transverse pre-camber of the bridge deck block.

7. The main and secondary trusses combined with steel truss bridge deck block assembly frame according to claim 1 is characterized by: In addition to the two ends and the middle of the bottom of the crossbeam of the intermediate bridge deck block (2), two additional support points are provided according to the span.

8. The main and secondary trusses combined with steel truss bridge deck block assembly frame according to claim 7 is characterized by: The support point is located below the vertical stiffening rib of the beam.

9. The main and secondary trusses combined with steel truss bridge deck block assembly frame according to claim 1 is characterized by: The bottom ends of the cross beams of the side bridge deck blocks (1) are provided with piers (4), the elevation of the tooth plates at the tops of the piers is associated with the elevation of the tooth plates at the bottom of the middle bridge deck blocks, and the elevation difference is determined according to a value obtained by computer simulation of the pre-camber curve.

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