Modularized manufacturing and posture efficient adjusting method for steel truss arch

Abstract

The invention discloses a steel truss arch modular manufacturing and posture efficient adjusting method. The method comprises the following steps that S1, a steel truss arch module and a steel box girder module are prepared; s2, after the steel truss arch module is turned over by 180 degrees, the steel truss arch module and the steel box girder module are assembled into a steel truss arch bridge; s3, a top turnover main lifting lug and a bottom turnover lifting lug are installed on the steel truss arch module; s4, a turning-over adjusting device is installed on the steel truss arch module; s5, after coating is completed, the steel truss arch bridge is turned over by 180 degrees through hoisting equipment; and S6, the steel truss arch bridge is hoisted to the installation position through the hoisting equipment, and installation of the steel truss arch bridge is completed. The problems that an existing construction method is low in construction efficiency, high in construction cost and the like are solved.

Description

Technical Field

[0001] The present invention relates to the manufacturing technology of steel structure bridges, and more specifically, to a method for modular manufacturing and efficient attitude adjustment of steel truss arches. Background Art

[0002] Due to the ability to withstand huge loads and the ability to create various different shapes, steel truss arches are increasingly applied to large-span steel bridges in cities, adding unique landscape elements to urban construction.

[0003] Such as Figure 1 and Figure 2 As shown, for a large-span steel truss arch bridge with a span exceeding 500m, it mainly consists of two major parts: a steel box girder 100 and multiple sections of steel truss arches 200 (the steel truss arch 200 includes two major parts: a steel truss girder 2001 and web members 2002). The conventional construction method is the support method, that is, installing supports on the surface of the steel box girder 100 as the support jig 300 for the steel truss arch 200, while adjusting the attitude and alignment of the steel truss arch 200, and completing the connection between adjacent two sections of the steel truss arch 200, as well as the connection between the steel truss arch 200 and the steel box girder 100.

[0004] Considering factors such as landscape modeling and structural strength, the erection height of the steel truss arch 200 varies from 5m to 20m. Therefore, when erecting the steel truss arch 200, support jigs 300 with different heights and load-bearing capacities need to be arranged, and the support jig 300 can only be removed after all welding, painting, inspection, etc. of the docking ring joint are completed. This construction method has low construction efficiency and high construction cost, which is relatively disadvantageous to the progress of the entire project. Summary of the Invention

[0005] Aiming at the defects existing in the prior art, the purpose of the present invention is to provide a method for modular manufacturing and efficient attitude adjustment of steel truss arches, which solves the problems of low construction efficiency and high construction cost of the existing construction methods.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A method for modular manufacturing and efficient attitude adjustment of steel truss arches includes the following steps:

[0008] S1, preparing steel truss arch modules and steel box girder modules;

[0009] S2, turning the steel truss arch module by 180° and assembling it with the steel box girder module to form a steel truss arch bridge;

[0010] S3, installing a top turning main lifting lug and a bottom turning lifting lug on the steel truss arch module;

[0011] S4. Install a turning and adjusting device on the steel truss arch module;

[0012] S5. After painting, use the hoisting equipment to turn the steel truss arch bridge over by 180°;

[0013] S6. Then use the hoisting equipment to hoist the steel truss arch bridge to the installation position to complete the installation of the steel truss arch bridge.

[0014] Preferably, step S1 specifically includes:

[0015] Place the steel truss arch in the reverse direction to make the steel truss arch module;

[0016] Make the steel box girder small segments into separate modules and assemble them among multiple separate modules at the assembly site to make the steel box girder module.

[0017] Preferably, when preparing the steel truss arch module, install an adjusting device on the inner side of the web members of the steel truss arch at the same time.

[0018] Preferably, the adjusting device is a jacking support.

[0019] Preferably, in step S3, there are two top turning main lifting lugs, which are symmetrically arranged at one end position of the top plate of the steel truss arch module;

[0020] There are two bottom turning lifting lugs, which are symmetrically arranged at the other end position of the bottom plate of the steel truss arch module relative to the top turning main lifting lugs.

[0021] Preferably, in step S4, the turning and adjusting device includes an adjusting top beam, a top turning lifting lug, an upper connecting piece, and a lower connecting piece;

[0022] The lower connecting piece is arranged at the other end position of the top plate of the steel truss arch module;

[0023] The upper connecting piece is connected to the lower connecting piece through a pin shaft;

[0024] The adjusting top beam is horizontally arranged, and the lower surface of its inner end is connected to the upper connecting piece;

[0025] The top turning lifting lug is arranged on the upper surface of the inner end of the adjusting top beam.

[0026] Preferably, step S5 specifically includes the following steps:

[0027] S51. Connect the first main hook on the hoisting equipment to the top turning main lifting lug, and connect the second main hook on the hoisting equipment to the bottom turning lifting lug to make the steel truss arch bridge in a horizontal state;

[0028] S52. The first main hook is lifted to place the steel truss arch bridge in a state of being turned over by 45°.

[0029] S53. The first main hook continues to be lifted until the steel truss arch bridge is in a freely turned-over state and then the lifting stops.

[0030] S54. The second main hook is replaced and connected to the top turning-over lifting lug.

[0031] S55. The second main hook is lifted to place the steel truss arch bridge in a state of being turned over by 135°.

[0032] S56. The second main hook continues to be lifted until the steel truss arch bridge is in a state of being turned over by 180° and then the lifting stops.

[0033] Preferably, step S6 specifically includes:

[0034] One end of the steel truss arch bridge is butt-jointed with the ring opening of the previously installed steel truss arch of the previous section, and the connection point between the web members of the steel truss arch bridge and the steel box girder is butt-jointed through an adjustment device at the lower end;

[0035] The three-way hydraulic jacks in contact with the adjustment device are adjusted respectively to adjust the attitude of the steel truss arch bridge, so that the overall alignment of the steel truss arch bridge and the misalignment of the butt joint of the ring opening with the steel truss arch meet the requirements. The gap between the pier and the steel truss arch is tightly plugged with thin steel plates. After the attitude adjustment of the steel truss arch bridge is completed, the welding of the ring opening is carried out, and finally the installation of the steel truss arch bridge is completed.

[0036] A method for modular manufacturing and efficient attitude adjustment of a steel truss arch provided by the present invention realizes the modular manufacturing of steel truss girders and web members into a steel truss arch. By adopting the present invention, the installation and positioning of the steel truss arch no longer use a support falsework, and the installation and adjustment of the steel truss arch are directly realized by using an integrated device for turning over and attitude adjustment, saving falsework resources, reducing project costs and improving construction efficiency. Description of the Drawings

[0037] Figure 1 is a layout schematic diagram of the existing support falsework for erecting a steel truss arch;

[0038] Figure 2 is Figure 1 a side view schematic diagram of

[0039] Figure 3 is a schematic diagram of steps S1 and S2 in the modular manufacturing and efficient attitude adjustment of the steel truss arch of the present invention;

[0040] Figure 4 is a schematic diagram of steps S3 and S4 in the modular manufacturing and efficient attitude adjustment of the steel truss arch of the present invention;

[0041] Figure 5 is Figure 4 The schematic diagram in the A-A direction in

[0042] Figure 6 is Figure 4 The schematic diagram in the B-B direction in

[0043] Figure 7 is Figure 5 The enlarged schematic diagram at positions I and II in

[0044] Figure 8 is the schematic diagram of the steel truss arch module made after the steel truss arch is placed reversely during the modular manufacturing and efficient attitude adjustment of the steel truss arch of the present invention;

[0045] Figure 9 is the schematic diagram of step S5 during the modular manufacturing and efficient attitude adjustment of the steel truss arch of the present invention;

[0046] Figure 10 is the schematic diagram of step S6 during the modular manufacturing and efficient attitude adjustment of the steel truss arch of the present invention;

[0047] Figure 11 is Figure 10 The enlarged schematic diagram at position III in

[0048] Figure 12 is Figure 10 The schematic diagram in the C-C direction in Detailed implementation manners

[0049] In order to better understand the above technical solution of the present invention, the technical solution of the present invention will be further described below with reference to the drawings and embodiments.

[0050] A method for modular manufacturing and efficient attitude adjustment of a steel truss arch provided by the present invention includes the following steps:

[0051] S1, preparing a steel truss arch module and a steel box girder module;

[0052] S2, turning the steel truss arch module over by 180° and assembling it with the steel box girder module to form a steel truss arch bridge;

[0053] S3, installing a top turning main lifting lug and a bottom turning lifting lug on the steel truss arch module;

[0054] S4, installing a turning adjustment device on the steel truss arch module;

[0055] S5, after painting is completed, using a hoisting device to turn the steel truss arch bridge over by 180°;

[0056] S6, then using a hoisting device to hoist the steel truss arch bridge to the installation position to complete the installation of the steel truss arch bridge.

[0057] As Figure 3 and Figure 4 shown, the above-mentioned steps S1 and S2 specifically include:

[0058] After the steel truss arch is placed in the reverse direction, a steel truss arch module 400 is made.

[0059] The small segments of the steel box girder are first made into separate modules, and the assembly between multiple separate modules is carried out at the assembly site to make a steel box girder module 500.

[0060] Then, after the steel truss arch module 400 is turned over by 180° through the turning-over process, the steel truss arch module 400 is respectively assembled with the steel box girder module 500, and finally a steel truss arch bridge 600 is assembled.

[0061] The steel truss arch includes a steel truss 4001 and web members 4002. The web members 4002 are 4 slender members and extend about 5 - 15 m outside the main structure. To realize the modular manufacturing of the steel truss arch module 400, it is necessary to manufacture the steel truss arch by placing it in the reverse direction, that is, with the top plate surface of the steel truss 4001 as the bottom, assembling and forming on the integrated jig 700, and finally installing 4 web members 4002, as Figure 8 shown.

[0062] As Figures 5 to 7 shown, in the above-mentioned step S3, a top turning main lifting lug 4003 and a bottom turning lifting lug 4004 are respectively installed on the steel truss arch, where:

[0063] There are two top turning main lifting lugs 4003, which are symmetrically arranged at one end position of the top plate of the steel truss 4001 of the steel truss arch module 400.

[0064] There are two bottom turning lifting lugs 4004, which are symmetrically arranged at the other end position of the bottom plate of the steel truss 4001 of the steel truss arch module 400 relative to the top turning main lifting lug 4003.

[0065] Meanwhile, a turning adjustment device 800 is installed at the other end position of the top plate of the steel truss 4001 of the steel truss arch module 400.

[0066] The turning adjustment device 800 includes an adjustment top beam 8001, a top turning lifting lug 8002, an upper connecting member 8003, and a lower connecting member 8004.

[0067] The lower connecting member 8004 is connected to the other end position of the top plate of the steel truss 4001 of the steel truss arch module 400.

[0068] The upper connecting member 8003 is connected to the lower connecting member 8004 through a pin shaft 8005.

[0069] Adjust the top beam 8001 to be horizontally set, and its inner end lower surface is connected to the upper connecting member 8003.

[0070] The top turning lifting lug 8002 is connected to the upper surface of the inner end of the adjusting top beam 8001.

[0071] The turning adjustment device 800 is used for the overall turning of the steel truss arch bridge 600 and the linear adjustment of the steel truss arch package.

[0072] When preparing the steel truss arch module 400, the adjustment device 4005 is installed on the inner side of the web member 4002 of the steel truss arch at the same time. The adjustment device 4005 is a jacking support and is used for the linear adjustment of the position of the web member 4002 of the steel truss arch.

[0073] The top turning main lifting lug 4003, the bottom turning lifting lug 4004 and the adjustment device 4005 are all installed when the steel truss arch is fabricated in reverse.

[0074] As Figure 9 shown, the above-mentioned step S5 specifically includes the following steps:

[0075] S51, the first main hook 1 on the hoisting equipment is connected to the top turning main lifting lug 4003, and the second main hook 2 on the hoisting equipment is connected to the bottom turning lifting lug 4004 to make the steel truss arch bridge 600 in a horizontal state;

[0076] S52, the first main hook 1 hoists to make the steel truss arch bridge 600 in a 45° turning state;

[0077] S53, the first main hook 1 continues to hoist until the steel truss arch bridge 600 is in a free turning state and then stops hoisting;

[0078] S54, the second main hook 2 changes the hook and connects to the top turning lifting lug 8002 on the turning adjustment device 800;

[0079] S55, the second main hook 2 hoists to make the steel truss arch bridge 600 in a 135° turning state;

[0080] S56, the second main hook 2 continues to hoist until the steel truss arch bridge 600 realizes a 180° turning state and then stops hoisting.

[0081] As Figures 10 to 12 shown, the above-mentioned step S6 specifically includes:

[0082] Place the support jig 3 in advance at the position of the adjustment device 4005 corresponding to the web member 4002 at the connection position of the top plate and the web member of the steel box girder 900. Place the three-way hydraulic jack 4 on the support jig 3. Place the three-way hydraulic jack 5 and the pier 6 respectively at the end top plate positions of the already installed steel truss arch.

[0083] After the steel truss arch bridge 600 is turned over, it is hoisted to the installation position. One end of the steel truss arch bridge 600 is butted with the ring opening 7 of the previously installed steel truss arch 10 in the previous section, and the lower end is butted with the connection point 8 between the web member 4002 on the steel truss arch bridge 600 and the steel box girder 900 through the adjusting device 4005.

[0084] The three-way hydraulic jacks 3 in contact with the adjusting device 4005 are adjusted respectively to adjust the attitude of the steel truss arch bridge 600, so that the overall linear shape of the steel truss arch bridge 600 and the misalignment of the butt joint with the ring opening 7 of the steel truss arch meet the requirements. The gap between the pier 6 and the steel truss arch is tightened with thin steel plates. After the attitude adjustment of the steel truss arch bridge 600 is completed, the welding of the ring opening 7 and the connection point 8 is carried out, and finally the installation of the steel truss arch bridge 600 is completed.

[0085] Continue with the modular manufacturing of other steel truss arches and the efficient attitude adjustment on site according to the above steps. The integrated device for turning over and attitude adjustment can be reused, and there is no need to install the support jig, reducing the project cost and improving the construction efficiency.

[0086] Those of ordinary skill in the art in this technical field should recognize that the above embodiments are only used to illustrate the present invention, rather than to limit the present invention. As long as it is within the scope of the spirit of the present invention, the changes and modifications of the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A method for modular manufacturing and efficient attitude adjustment of a steel truss arch, characterized in that, It includes the following steps: S1. Prepare the steel truss arch module and the steel box girder module; S2. After turning the steel truss arch module over by 180°, assemble it with the steel box girder module to form a steel truss arch bridge; S3. Install the top turning main lifting lug and the bottom turning lifting lug on the steel truss arch module; S4. Install the turning adjustment device on the steel truss arch module; S5. After painting is completed, use the hoisting equipment to turn the steel truss arch bridge over by 180°; S6. Then use the hoisting equipment to hoist the steel truss arch bridge to the installation position to complete the installation of the steel truss arch bridge.

2. The modular manufacturing and attitude efficient adjustment method of the steel truss arch according to claim 1, characterized in that, The step S1 specifically includes: Place the steel truss arch reversely to make the steel truss arch module; Make the small sections of the steel box girder into separate modules, and assemble them among multiple separate modules at the assembly site to make the steel box girder module.

3. The modular manufacturing and attitude efficient adjustment method of the steel truss arch according to claim 2, characterized in that: When preparing the steel truss arch module, install the adjustment device on the inner side of the web members of the steel truss arch at the same time.

4. The method for modular manufacturing and efficient attitude adjustment of the steel truss arch according to claim 3, characterized in that: The adjustment device is a jacking support.

5. The modular manufacturing and attitude efficient adjustment method of the steel truss arch according to claim 1, characterized in that: In the step S3, there are two top turning main lifting lugs, which are symmetrically arranged at one end of the top plate of the steel truss arch module; There are two bottom turning lifting lugs, which are symmetrically arranged at the other end of the bottom plate of the steel truss arch module relative to the top turning main lifting lugs.

6. The method for modular manufacturing and efficient attitude adjustment of a steel truss arch according to claim 5, characterized in that: In the step S4, the turning adjustment device includes an adjustment top beam, a top turning lifting lug, an upper connecting piece, and a lower connecting piece; The lower connecting piece is arranged at the other end of the top plate of the steel truss arch module; The upper connecting piece is connected to the lower connecting piece through a pin shaft; The adjustment top beam is horizontally arranged, and the lower surface of its inner end is connected to the upper connecting piece; The top turning lifting lug is arranged on the upper surface of the inner end of the adjustment top beam.

7. The method for modular manufacturing and efficient attitude adjustment of a steel truss arch according to claim 6, characterized in that The step S5 specifically includes the following steps: S51. Connect the first main hook on the hoisting equipment to the top turning main lifting lug, and connect the second main hook on the hoisting equipment to the bottom turning lifting lug to make the steel truss arch bridge in a horizontal state; S52. The first main hook hoists to make the steel truss arch bridge in a state of turning over by 45°; S53. The first main hook continues to hoist until the steel truss arch bridge is in a free turning state and then stops hoisting; S54. The second main hook changes the hook and connects to the top turning lifting lug; S55. The second main hook hoists to make the steel truss arch bridge in a state of turning over by 135°; S56. The second main hook continues to hoist until the steel truss arch bridge is in a state of turning over by 180° and then stops hoisting.

8. The method for modular manufacturing and efficient attitude adjustment of a steel truss arch according to claim 7, characterized in that, The step S6 specifically includes: One end of the steel truss arch bridge is butt-jointed with the ring opening of the previously installed steel truss arch in the previous section, and the connection point between the web members of the steel truss arch bridge and the steel box girder is butt-jointed through the adjustment device at the lower end; Respectively adjust the three-way hydraulic jacks in contact with the adjustment device to adjust the attitude of the steel truss arch bridge, so that the overall alignment of the steel truss arch bridge and the misalignment of the butt joint of the ring opening with the steel truss arch meet the requirements. Use thin steel plates to tightly fill the gap between the pier and the steel truss arch. After completing the attitude adjustment of the steel truss arch bridge, weld the ring opening, and finally complete the installation of the steel truss arch bridge.

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