A method for installing a beam plate suitable for a bridge approach renovation

Abstract

The application discloses a kind of installation methods suitable for beam plate of approach bridge reconstruction, comprising the following steps: S01: new approach bridge block;S02: anchor positioning of crane ship;S03: transport box girder component;S04: build bridge erection platform;S05: assemble bridge erector;S06: install box girder;S07: transport plate girder component;S08: bridge erector transverse to reconstruction section approach bridge;S09: install plate girder;S10: disassemble bridge erector.The installation method suitable for beam plate of approach bridge reconstruction of the application, bridge erection platform provides installation platform and howitzer passageway for bridge erector, greatly realizes that installation operation surface does not cross other field operation, "zero" occupation to other operation surface, guarantee progress synchronous follow-up;And whole operation procedure is closely linked, component transfer frequency is less, resource utilization rate reaches more than 90%, improves work efficiency, finished product quality is protected, reduces installation operation risk, maximum limit saves construction cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of box girder installation, in particular to a method for installing a girder slab suitable for approach bridge reconstruction. BACKGROUND

[0002] As an important building connecting the wharf and the land, the approach bridge plays a very important role. However, with the increase of transportation pressure, the existing old approach bridge not only has uneven road surface, but also cannot meet the current loading and unloading transportation demand, so it is necessary to widen and reconstruct the existing old approach bridge.

[0003] In the process of widening and reconstructing the approach bridge, the installation of the girder slab is an important construction step. The existing girder slab installation mainly has the following deficiencies:

[0004] The existing installation machinery involves a girder transport vehicle, a bridge erecting machine and a crawler crane. After the girder transport ship docks, the box girder is transferred to a temporary loading wharf by a water hoisting ship. The box girder at the temporary wharf is transported to the approach bridge first span by the crawler crane or the truck crane in cooperation with the girder transport vehicle, and is transferred to the installation operation surface by the hoisting equipment.

[0005] The existing installation process needs to set a temporary loading wharf on the shore side, and the setting of the temporary wharf is limited by the sea red line and cannot be absolutely convenient. At the same time, the shore side needs to set a girder transport channel and a hoisting equipment operation channel. The component transfer frequency is high, the process is complicated, the mechanical equipment exists for a long time, the process operation safety risk is increased, the work efficiency is low, the resource utilization rate is low, and the economic cost benefit is low.

[0006] The girder transport channel and the equipment operation channel occupy a large area, which is not conducive to the on-site operation traffic order, involves more operation surface cross operation, has more safety problems, has large cross operation coordination workload, is not conducive to the progress, quality and installation control. SUMMARY

[0007] In order to overcome the technical defects of the prior art, the technical problem to be solved by the present application is to provide a method for installing a girder slab suitable for approach bridge reconstruction, which has the characteristics of economic efficiency, high resource utilization rate, low installation operation risk and low construction cost.

[0008] The present application solves the above problems by the following technical means:

[0009] The method for installing a girder slab suitable for approach bridge reconstruction provided by the present application comprises the following steps:

[0010] S01: New approach bridge block: The new approach bridge includes a newly built section approach bridge and a reconstructed section approach bridge, wherein: the newly built section approach bridge is one span box girder in length direction, and each box girder in width direction of the newly built section approach bridge is one bay box girder; the reconstructed section approach bridge is one span plate girder in length direction, and each plate girder in width direction of the reconstructed section approach bridge is one bay plate girder;

[0011] S02: Crane ship anchoring positioning: The crane ship is moved to the vicinity of the bent of the newly built section approach bridge at the far shore end and is anchored and positioned;

[0012] S03: Transport box girder component: The box girder component is transported by the transport ship to the crane ship hoisting range;

[0013] S04: Build the bridge erection platform: After the box girder on the transport ship is hoisted by the crane ship, the three-span box girders are sequentially installed from the far shore end to the near shore end to form the bridge erection platform;

[0014] S05: Assemble the bridge erector: The main components of the bridge erector are transported on land to the reconstructed section approach bridge and are assembled on the built bridge erection platform by the crane;

[0015] S06: Install the box girder: The box girder on the transport ship is hoisted by the crane ship to the gun carriage on the bridge erection platform, and is transported to the lower part of the bridge erector by the gun carriage, and the box girder is sequentially installed from the far shore end to the near shore end by the bridge erector;

[0016] S07: Transport plate girder component: The plate girder component is transported on land to the far shore end of the reconstructed section approach bridge;

[0017] S08: Move the bridge erector to the reconstructed section approach bridge;

[0018] S09: Install the plate girder: The plate girder at the far shore end of the reconstructed section approach bridge is transported to the lower part of the bridge erector by the gun carriage, and is sequentially installed from the near shore end to the far shore end by the bridge erector;

[0019] S10: Disassemble the bridge erector: After the plate girder is installed, the bridge erector is disassembled by the crane and leaves the scene.

[0020] The preferred technical scheme of the present application is that in step S02, the ship body of the crane ship is perpendicular to the newly built section approach bridge.

[0021] The preferred technical scheme of the present application is that in step S03, the positioning ship is used to position the transport ship.

[0022] The preferred technical scheme of the present application is that in steps S04 and S06, the multiple bays of each span box girder are installed from the side close to the reconstructed section approach bridge to the side away from the reconstructed section approach bridge.

[0023] The preferred technical scheme of the present application is that in step S04 and step S06, after the erection of one span box girder, the flange plate reinforcement and the transverse plate reinforcement of the span box girder are welded, and then the erection of the next span box girder is performed.

[0024] The preferred technical scheme of the present application is that in step S09, the multiple plate girders in each span plate girder are installed from the side close to the newly-built approach bridge to the side far away from the newly-built approach bridge.

[0025] The preferred technical scheme of the present application is that in step S09, after the erection of one span plate girder, the flange plate reinforcement and the transverse plate reinforcement of the span plate girder are welded, and then the erection of the next span plate girder is performed.

[0026] From the above technical scheme, the present application has the following beneficial effects:

[0027] The installation method of the girder plate suitable for the approach bridge reconstruction of the present application has the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 The basic layout of the girder plate installation area provided in the specific embodiment of the present application is shown in the figure;

[0029] Figure 2 The upper structure section view of the reconstruction section approach bridge provided in the specific embodiment of the present application is shown in the figure;

[0030] Figure 3 The upper structure section view of the newly-built section approach bridge provided in the specific embodiment of the present application is shown in the figure;

[0031] Figure 4 The basic layout of the girder plate installation area provided in the specific embodiment of the present application is shown in the figure;

[0032] As Figures 1-4, positioning ship-011, transport ship-012, newly-built section approach bridge-013, reconstructed section approach bridge-014, floating crane-015, bridge erecting machine-016, bank-017, plate girder-021, flange plate reinforcement-022, diaphragm plate reinforcement-023, box girder-031, crane-041, flat car-042, bridge erecting platform-043. DETAILED DESCRIPTION

[0033] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0034] The terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0035] The present application will be described in detail below with reference to the accompanying drawings, as shown in Figures 1 to 4 The installation method of the girder plate suitable for approach bridge reconstruction described in the present embodiment includes the following steps:

[0036] S01: New approach bridge block: The new approach bridge includes the newly-built section approach bridge 013 and the reconstructed section approach bridge 014. Specifically, the newly-built section approach bridge 013 is provided with 20 rows of frames in the length direction, and is numbered 1-20 in sequence from the bank side. There is one span box girder 031 between every two rows of frames, and there are 10 span box girders 031 in total. Each span box girder 031 is divided into 6 compartments in the width direction of the newly-built section approach bridge 013, and there are 6 bays of box girders 031 in total. The reconstructed section approach bridge 014 is divided into 13 compartments in the length direction, and there are 13 span plate girders 021 in total. Each span plate girder 021 is divided into 18 compartments in the width direction of the reconstructed section approach bridge 014, and there are 18 bays of plate girders 021 in total.

[0037] S02: Anchoring and positioning of floating crane 015: The floating crane 015 is moved to the vicinity of the 20th row of frames so that the hull is perpendicular to the bridge body, and then anchored and positioned.

[0038] S03: Transporting box girder 031 components: The box girder 031 components are transported by water to the hoisting range of the floating crane 015 using the transport ship 012, and are positioned by the positioning ship 011.

[0039] S04: Erecting the bridging platform 043: After the crane vessel 015 lifts the box girder 031 located on the transport vessel 012 for a trial lift, the three spans of box girder 031 between rows 20-14 are then lifted in sequence (e.g., Figure 4 As shown), a bridge-building platform 043 is formed. In order to ensure that each box girder 031 in each span is installed evenly and tightly, the hoisting of each span of box girder 031 is carried out from the side closer to the approach bridge 014 of the renovation section to the side farther away from the approach bridge 014 of the renovation section. After the erection of one span of box girder 031, the flange plate steel bars 022 and the transverse diaphragm steel bars 023 are welded to the span of box girder 031 before the erection of the next span of box girder 031.

[0040] S05: Bridge erecting machine; 016: such as... Figure 4 As shown, the main components of the bridge erecting machine 016 are transported by flatbed truck 042 to the old approach bridge, and then assembled on the bridge erecting platform 043 by crane 041.

[0041] S06: Installation of Box Girder 031: The crane vessel 015 lifts the box girder 031 located on the transport vessel 012 onto the gun carriage located on the bridge erection platform 043. The gun carriage then transports the box girder 031 to the underside of the bridge erection machine 016. The bridge erection machine 016 then installs the seven spans of box girder 031 between rows 14-1 in sequence. To ensure that each box girder 031 in each span is installed evenly and tightly, the lifting of each span of box girder 031 is carried out from the side closer to the approach bridge 014 of the modified section to the side farther away from the approach bridge 014 of the modified section. After erecting one span of box girder 031, the flange plate steel bars 022 and the transverse diaphragm steel bars 023 are welded to that span of box girder 031 before the next span of box girder 031 is erected.

[0042] S07: Transporting 021 slab girder components: Transporting 021 slab girder components by land to the far end of the approach bridge 014 of the reconstructed section.

[0043] S08: The bridge erecting machine 016 moves laterally to the approach bridge 014 of the renovation section.

[0044] S09: Installation of Slab Beam 021: The artillery vehicle transports the slab beam 021 located at the far end of the approach bridge 014 of the modified section to the area below the bridge erecting machine 016. The bridge erecting machine 016 is used to install the 1st to 13th spans of slab beam 021 in sequence. In order to ensure that each slab beam 021 in each span is installed evenly and tightly, the 18 slab beams 021 in each span are installed from the side closer to the approach bridge 013 of the new section to the side farther away from the approach bridge 013 of the new section. After the slab beam 021 of one span is erected, the flange plate steel bars 022 and the transverse diaphragm steel bars 023 are welded to the slab beam 021 of that span before the next span of slab beam 021 is erected.

[0045] S10: Dismantling the bridge erecting machine 016: After the plate girder 021 is installed, the bridge erecting machine 016 is dismantled by crane 041.

[0046] The beam installation method for the approach bridge reconstruction described in this embodiment allows for the direct temporary installation of the three spans of box girder 031 on the far shore side after the crane vessel 015 is vertically moored beside the approach bridge and the transport vessel 012 positions the box girder 031 via water transport. This forms a bridge erection platform 043, providing an installation platform and access road for the bridge erecting machine 016. This method maximizes the avoidance of interference with other on-site operations and minimizes the occupation of other work areas, ensuring synchronized progress. It eliminates the need for temporary docks, access roads, and work lanes, and also reduces traffic management workload. The method is technically feasible and economically efficient. Furthermore, in the entire operation process, the crane vessel 015 lifts the box girder 031 to the access road, and the access road directly feeds the girder. This results in a compact connection, fewer component transfers, and a resource utilization rate of over 90%, improving efficiency, protecting the quality of the finished product, reducing installation risks, and maximizing cost savings.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A method for installing beams and slabs suitable for the reconstruction of approach bridges, characterized in that: Includes the following steps: S01: New approach bridge segmentation: The new approach bridge includes newly built approach bridge sections and renovated approach bridge sections, wherein: the length of each box girder in the length direction of the newly built approach bridge section is one span of box girder, and the width of each box girder in the width direction of the newly built approach bridge section is one box girder; the length of each slab girder in the length direction of the renovated approach bridge section is one span of slab girder, and the width of each slab girder in the width direction of the renovated approach bridge section is one slab girder. S02: Anchoring and positioning of the crane vessel: Move the crane vessel to the vicinity of the frame at the far end of the new section of the approach bridge and anchor it. S03: Transporting box girder components: The box girder components are transported by waterway to the lifting range of the crane vessel using a transport ship; S04: Constructing a bridge-building platform: After the crane vessel lifts the box girder located on the transport vessel for a trial lift, it will advance and install the three-span box girder sequentially from the far shore to the near shore to form a bridge-building platform; S05: Bridge erection machine assembly: The main components of the bridge erection machine are transported by land to the approach bridge of the renovation section, and assembled by a crane on the pre-built bridge erection platform; S06: Box girder installation: The crane ship lifts the box girder on the transport ship onto the gun carriage on the bridge erection platform. The gun carriage then transports the box girder to the bottom of the bridge erection machine, which then uses the bridge erection machine to install the box girder sequentially from the far bank to the near bank. S07: Transporting slab girder components: Transporting slab girder components by land to the far bank end of the approach bridge of the reconstructed section; S08: The bridge erecting machine moves laterally to the approach bridge of the renovation section; S09: Installing the slab girder: The artillery vehicle transports the slab girder located at the far bank end of the approach bridge of the modified section to the area below the bridge erecting machine, and the bridge erecting machine pushes it forward from the near bank end to the far bank end for installation. S10: Dismantling the bridge erecting machine: After the bridge girder is installed, a crane is used to dismantle the bridge erecting machine and remove it from the site.

2. The installation method for beams and slabs suitable for approach bridge reconstruction according to claim 1, characterized in that: In step S02, the hull of the crane vessel is fixed perpendicular to the newly built approach bridge section.

3. The method for installing beams and slabs suitable for approach bridge reconstruction according to claim 1, characterized in that: In step S03, a positioning vessel is used to position the transport vessel.

4. The method for installing beams and slabs suitable for approach bridge reconstruction according to claim 1, characterized in that: In steps S04 and S06, the multiple box girders in each span are installed from the side closest to the approach bridge of the modified section to the side furthest from the approach bridge of the modified section.

5. The installation method for beams and slabs suitable for approach bridge reconstruction according to claim 1, characterized in that: In steps S04 and S06, after erecting one span of box girder, the flange plate reinforcement and diaphragm reinforcement are welded to the span of box girder before the next span of box girder is erected.

6. The method for installing beams and slabs suitable for approach bridge reconstruction according to claim 1, characterized in that: In step S09, the multiple slab beams in each span are installed from the side closest to the new approach bridge to the side furthest from the new approach bridge.

7. The method for installing beams and slabs suitable for approach bridge reconstruction according to claim 1, characterized in that: In step S09, after erecting one span of slab beam, the flange plate reinforcement and diaphragm reinforcement are welded to the span of slab beam before the next span of slab beam is erected.

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