Corrugated steel web composite bridge swivel construction system and method

Abstract

The invention relates to the technical field of bridges, in particular to a corrugated steel web combined bridge swivel construction system and method. A few-support method is adopted for cast-in-place and light-structure rotation, the advantages of self-bearing, light structure, large span and the like of the corrugated steel web are fully utilized, the corrugated steel web which is a light main beam structure can be rapidly rotated in place by being combined with a special rotation construction technology, and the influence on traffic under a bridge is reduced; comprising a corrugated steel web space frame body mechanism, a center rotating mechanism and / or a beam section support rotating mechanism. The corrugated steel web space frame body mechanism provides a working platform for concrete construction of a top plate and a bottom plate of the corrugated steel web concrete composite beam. The center rotating mechanism comprises a supporting frame, an outer ring rotating disc installed on the supporting frame and a rotating table. The beam section support rotating mechanism comprises a swivel support foundation and a rotating module installed on the swivel support foundation, and the swivel support foundation comprises a precast pile and a profile steel top beam installed on the top of the precast pile.

Description

Technical Field

[0001] The invention relates to the technical field of bridges, and in particular to a rotation construction system and method for a corrugated steel web composite bridge. Background Art

[0002] Composite beam with corrugated steel web is a new type of steel-concrete composite bridge. It uses corrugated steel plate to replace the traditional reinforced concrete web, solving the problems of web cracking, main beam deflection, poor seismic performance, etc. It has been widely used in China, especially in large-span bridges. The corrugated steel web has the advantages of large spanning capacity, light structural weight, good seismic performance, long single segment, and self-bearing. However, the construction methods of composite bridges with corrugated steel web at home and abroad mostly adopt traditional construction methods such as prefabricated hoisting, cantilever casting, and full-span brackets. Such methods cannot effectively speed up the construction period, and are more difficult and costly in cross-line construction. They also fail to fully utilize the advantage of corrugated steel web that can bear weight once it is erected. The rotation construction method is often used in railway cross-line projects. The main beams are mostly prestressed reinforced concrete bridges, which have heavy structural weight, difficult rotation construction, high operation risks, and large amount of brackets. There are no cases of applying rotation construction in composite bridges with corrugated steel webs at home and abroad. Summary of the invention

[0003] 1. Technical issues to be resolved In view of the deficiencies in the prior art, the present invention provides a cast-in-place, light structure rotation using a few-support method, which fully utilizes the advantages of corrugated steel webs, such as self-load-bearing, light structure, and large span. By combining with a special rotation construction process, the corrugated steel web, a light main beam structure, can be quickly rotated into place, thereby reducing the impact on traffic under the bridge, thereby achieving a corrugated steel web composite bridge rotation construction system and method.

[0004] (II) Technical solution To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a rotation construction system for a composite bridge with corrugated steel webs, comprising a corrugated steel web space frame mechanism, a central rotation mechanism and / or a beam segment support rotation mechanism; the corrugated steel web space frame mechanism provides a working platform for the construction of the top and bottom plate concrete of the corrugated steel web concrete composite beam; the central rotation mechanism is installed on the top of the main bridge pier where the main beam is to be installed, and the central rotation mechanism comprises a support frame, an outer ring turntable and a turntable installed on the support frame; an inner ball joint is provided between the outer ring turntable and the turntable, and the turntable is rotationally connected to the outer ring turntable via the inner ball joint; the beam segment support rotation mechanism is installed below the beam segment with a middle cross beam on the main beam to be installed, and the beam segment support rotation mechanism The structure includes a swivel support foundation and a swivel module installed on the swivel support foundation, the swivel support foundation includes precast piles and a steel crown beam installed on the top of the precast piles, the steel crown beam is an arc-shaped body, the center of the arc-shaped body coincides with the central axis of the main pier, the swivel module includes a swivel main support and an adjustment support block installed on the swivel main support; the swivel main support adopts a steel frame or steel truss structure composed of steel sections, the swivel module provides a working platform and structural support for the prefabrication of the corrugated steel web space frame body, and a tire unit is provided at the bottom end of the swivel main support; the adjustment support block is used to support the bottom of the corrugated steel web space frame body mechanism; the corrugated steel web space frame body mechanism is the main structure of the main beam to be installed. Furthermore, the inner ball joint includes two sliding surfaces separated from each other, and the two sliding surfaces on the inner ball joint are in sliding contact with the outer ring turntable and the turntable respectively; the tire unit can rotate 120° in a directional manner and has its own intelligent power control system, and the tire unit completes the circular arc rotation movement at both ends of the steel section according to the set walking parameters; the top of the adjustment support block fits with the bottom of the corrugated steel web composite beam, and the height of the adjustment support block should meet the requirements of different main beam clear heights, clear heights under bridges, etc.; the lower support is fixedly installed with the adjustment support block, and after the lower support is installed in place at the adjustment support block, it provides positioning support for the subsequent corrugated steel web installation.

[0005] Preferably, it also includes a rotation control and monitoring mechanism, through which synchronous traction control of the main beam to be installed and dynamic monitoring of the rotation process are realized; the rotation control and monitoring mechanism includes a traction device, a three-dimensional laser scanning device and a data processing and control center symmetrically arranged on both sides of the turntable; the traction device adopts an intelligent jack and a displacement meter; further, the intelligent jack synchronously tensions the turntable on the center rotation mechanism, the intelligent jack is connected to the prestressed component arranged at the main bridge pier cap, and the intelligent jack is combined with the displacement meter to realize the precise displacement of the turntable; the three-dimensional laser scanning device dynamically scans the main beam forming quality and the entire rotation process, and the scanning device is installed on the outside of the main beam rotation in advance, and the key parameters such as the spatial position change of the main beam and the deformation of the mobile bracket before, during and after the rotation are dynamically scanned, and the three-dimensional imaging is entered into the data processing and control center for verification and correction with the design parameters, which can also be used as a basis for inspection of the construction quality of the rotating bridge.

[0006] Preferably, a rotation limiting mechanism for the main beam to be installed is installed on the steel crown beam, and the rotation limiting mechanism includes a limiting device and an elastic anti-collision layer, and the elastic anti-collision layer is arranged on the side of the limiting device adjacent to the main beam to be installed; further, the limiting device is a triangular piece formed by welding the steel group, and is connected to the central main pier cap and the swivel bracket foundation through embedded parts. The structure has strong shear resistance and push resistance capabilities to avoid excessive angle deviation of the swivel. At the same time, to prevent collision with the main beam, the edge of the triangular piece is wrapped with elastic material to form an elastic anti-collision layer. The elastic material has a certain hardness and elasticity to protect the touched part of the main beam.

[0007] Preferably, the swivel bracket foundation adopts an assembled foundation, and the top of the precast pile is provided with a crown beam hoop and a pile top reinforcement. The precast pile is detachably connected to the steel crown beam through the crown beam hoop; further, the steel crown beam is welded by multiple groups of I-beams to provide a platform for the tire unit to swivel and walk. The upper flange plate of the I-beam needs to be welded with a steel plate and anti-slip treatment is performed. The crown beam hoop is welded on the lower flange plate of the I-beam. The crown beam hoop is provided to quickly and reliably connect with the precast pile foundation. The precast piles adopt steel pipe piles, which are sunk to the designed depth by hammering or static pressing to meet the bearing capacity requirements. In order to prevent the pile top from yielding, the pile top position is poured with concrete or welded with reinforcing steel plates for local reinforcement structure treatment.

[0008] Preferably, a plurality of steel balls are rotatably installed on the top of the outer ring turntable, and the outer ring turntable is in rotational contact with the bottom of the turntable through the steel balls. A central rotating shaft is installed at the bottom of the turntable, and the bottom of the central rotating shaft is rotatably connected to the support frame, and the central rotating shaft passes through the inner ball joint.

[0009] Preferably, the corrugated steel web space frame body mechanism comprises two symmetrically arranged corrugated steel web composite beams, a lower support located at the bottom of the corrugated steel web composite beam, a plurality of temporary cross beams for connecting the two corrugated steel web composite beams, and a plurality of temporary vertical bars for connecting the same vertical cross beam, the corrugated steel web composite beam comprises a plurality of sections of corrugated steel webs connected end to end to each other; further, the adjustment support block is used to support the lower support; the applicable scenario of the corrugated steel web space frame body mechanism can be a single-box single-chamber or single-box multi-chamber corrugated steel web composite box beam, which is composed of two or more corrugated steel webs combined by top and bottom plate concrete in the cross section, and each web should be connected to form a corrugated steel web space frame structure with load-bearing capacity by temporary cross beams and temporary vertical bars arranged between the corrugated steel webs during installation, and then the top plate formwork system and the bottom plate formwork system are installed by using the corrugated steel web space frame structure, and the corrugated steel web space frame structure is used to provide a platform and support for the top plate and bottom plate reinforced concrete construction of the box beam.

[0010] A corrugated steel web composite bridge rotation construction method, using the corrugated steel web composite bridge rotation construction system for construction, comprising the following steps: S1. Main beam construction: install corrugated steel webs and construct transverse frame systems; set up the movable bracket support system for corrugated steel web beams; install the top and bottom slab concrete formwork support system; complete the steel bar binding and concrete pouring; perform prestressing and grouting of prestressed cables; S2. Rotation construction: install the central rotation mechanism at the main bridge pier, fix the top of the central rotation mechanism to the center of the bottom of the main beam, construct the rotation support foundation, install the beam section support rotation mechanism below the beam section with the middle cross beam on the main beam to be installed, install the rotation module in place, and install the lower support on the corrugated steel web space frame mechanism in place at the rotation module; release the temporary consolidation of the main beam and drop the beam; S3. Main beam rotation and installation: The main beam is rotated into place through the central rotation mechanism and / or the beam section support rotation mechanism; after the rotation is completed, the main beam is consolidated.

[0011] Preferably, the main beam construction in step S1 and the rotation construction in step S2 are carried out simultaneously.

[0012] (III) Beneficial effects Compared with the prior art, the present invention provides a rotation construction system and method for a corrugated steel web composite bridge, which has the following beneficial effects: standardization and factory production of all components, lightweighting and assembly on site, almost no construction waste generated on site, in line with the concept of green and environmentally friendly construction, while greatly reducing the temporary materials used in traditional bridge construction processes, reducing the number of personnel, and reducing operational risks. Temporary structures can basically be 100% reused, and cross-line bridges can be built quickly, safely, economically, and greenly. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic structural diagram of the positional relationship between the central rotating mechanism and the beam segment support rotating mechanism of the present invention and the main beam; Figure 2 It is a schematic diagram of the cross-sectional structure of the central rotating mechanism of the present invention; Figure 3 It is a schematic diagram of the horizontal plane structure of the central rotating mechanism of the present invention; Figure 4 It is a structural schematic diagram of the connection relationship between the beam section support rotation mechanism and the main beam from another perspective of the present invention; Figure 5 It is a schematic diagram of the basic planar structure of the swivel support of the present invention; Figure 6 It is a schematic diagram of the planar structure of the steel crown beam of the present invention; Figure 7 It is a schematic diagram of the planar structure of the corrugated steel web space frame structure of the present invention; Figure 8 It is a schematic diagram of the planar structure of the rotation control and monitoring mechanism and the rotation limiting mechanism of the present invention; Markings in the attached drawings: 1. Support frame; 2. Outer ring turntable; 3. Turntable; 4. Inner ball joint; 5. Precast pile; 6. Steel crown beam; 7. Rotating main bracket; 8. Adjusting support block; 9. Tire unit; 10. Three-dimensional laser scanning device; 11. Data processing and control center; 12. Traction device; 13. Limiting device; 14. Elastic anti-collision layer; 15. Crown beam hoop; 16. Pile top reinforcement; 17. Steel ball; 18. Center rotating shaft; 19. Corrugated steel web composite beam; 20. Lower support; 21. Temporary cross beam; 22. Temporary vertical rod; 23. Corrugated steel web. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0015] See also Figure 1-6A rotation construction system for a composite bridge with corrugated steel webs of the present invention comprises a corrugated steel web space frame mechanism, a central rotation mechanism and / or a beam segment bracket rotation mechanism; the corrugated steel web space frame mechanism provides a working platform for the construction of the top and bottom plate concrete of the corrugated steel web concrete composite beam; the central rotation mechanism is installed on the top of the main bridge pier where the main beam is to be installed, and the central rotation mechanism comprises a support frame 1, an outer ring turntable 2 and a turntable 3 installed on the support frame 1; an inner ball joint 4 is provided between the outer ring turntable 2 and the turntable 3, and the turntable 3 is rotatably connected to the outer ring turntable 2 through the inner ball joint 4; the beam segment bracket rotation mechanism is installed below the beam segment with a middle cross beam on the main beam to be installed, and the beam segment bracket rotation mechanism comprises a swivel bracket The foundation and the rotating module installed on the rotating bracket foundation, the rotating bracket foundation includes a precast pile 5, a steel crown beam 6 installed on the top of the precast pile 5, the steel crown beam 6 is an arc-shaped body, the center of the arc-shaped body coincides with the central axis of the main pier, the rotating module includes a rotating main bracket 7 and an adjusting support block 8 installed on the rotating main bracket 7; the rotating main bracket 7 adopts a steel frame or steel truss structure composed of steel sections, the rotating module provides a working platform and structural support for the prefabrication of the corrugated steel web space frame body, and a tire unit 9 is provided at the bottom end of the rotating main bracket 7; the adjusting support block 8 is used to support the bottom of the corrugated steel web space frame body mechanism; the corrugated steel web space frame body mechanism is the main structure of the main beam to be installed.

[0016] Furthermore, the inner ball joint 4 includes two sliding surfaces separated from each other, and the two sliding surfaces on the inner ball joint 4 are in sliding contact with the outer ring turntable 2 and the turntable 3 respectively; the tire unit 9 can rotate 120° in a directional manner and has its own intelligent power control system. The tire unit 9 completes the circular arc rotation movement at both ends of the steel section according to the set walking parameters; the top of the adjustment support block 8 is matched with the bottom of the corrugated steel web composite beam 19, and the height of the adjustment support block 8 should meet the requirements of different main beam clear heights, clear heights under the bridge, etc.; the lower support 20 is fixedly installed with the adjustment support block 8, and after the lower support 20 is installed in place at the adjustment support block 8, it provides positioning support for the subsequent installation of the corrugated steel web 23.

[0017] When rotating the main beam, the central rotating mechanism or the beam section support rotating mechanism can be used alone; or a combination of the central rotating mechanism and the beam section support rotating mechanism can be used; when the central rotating mechanism and the beam section support rotating mechanism are used in combination, since the main beam is supported at multiple points during the rotation, the central rotating mechanism at the main pier can be appropriately simplified, and the traction device 12 can be omitted. The main beam is mainly rotated into place by the movement of the tire unit 9. The main beam has a long cantilever. Compared with the support of the middle part of the main beam by the central rotating mechanism of the main pier, it can greatly reduce the high construction cost of the traditional central rotating mechanism to construct the inner ball joint 4, and can effectively reduce the safety risk of large-span bridge rotation construction. It is economical and reasonable, and the work efficiency is obvious.

[0018] For details, please refer to Figure 8, and also includes a rotation control and monitoring mechanism, through which the synchronous traction control of the main beam to be installed and the dynamic monitoring of the rotation process are realized; the rotation control and monitoring mechanism includes a traction device 12, a three-dimensional laser scanning device 10 and a data processing and control center 11 symmetrically arranged on both sides of the turntable 3; the traction device 12 adopts an intelligent jack and a displacement meter; further, the traction device 12 adopts a steel strand traction installed in advance on the main bridge pier and the pedestal reaction frame, and adopts an intelligent jack to realize the synchronization of the left and right traction devices 12. When the displacement meter detects that the rotation reaches the set angle, the intelligent jack can be controlled to automatically stop; the intelligent jack synchronously tensions the turntable 3 on the central rotating mechanism, and the intelligent jack is connected to the prestressed component set at the main bridge pier pedestal, and the precise displacement of the turntable 3 is realized by combining the intelligent jack with the displacement meter; the three-dimensional laser scanning device 10 is used to check the forming quality of the main beam The whole process of measurement and rotation is dynamically scanned. The scanning device is installed on the outside of the main beam rotation in advance. The key parameters such as the spatial position change of the main beam and the deformation of the mobile bracket are dynamically scanned before, during and after the rotation. The three-dimensional imaging is entered into the data processing and control center 11 for verification and correction with the design parameters, which can also be used as a basis for inspecting the construction quality of the rotating bridge. The data processing and control center 11 mainly controls two important construction parameters. By using digital means, the data processing and control center 11 can accurately control the rotation rate, rotation angle, traction power and other parameters of the rotation system to achieve synchronous control of traction power at both ends, uniform rotation, automatic shutdown and other functions. At the same time, the configured three-dimensional laser scanning device 10 accurately scans the deformation of the main beam during the rotation process at all times, analyzes the gap between the actual and the theory through the set software, and makes timely adjustments or corrections to ensure safe and accurate rotation.

[0019] For details, please refer to Figure 8 ; A rotation limiting mechanism for the main beam to be installed is installed on the steel crown beam 6, and the rotation limiting mechanism includes a limiting device 13 and an elastic anti-collision layer 14. The elastic anti-collision layer 14 is arranged on the side of the limiting device 13 adjacent to the main beam to be installed; further, the limiting device 13 is a triangular member formed by welding the steel group, and is connected to the central main pier cap and the swivel bracket foundation through embedded parts. The structure has strong shear resistance and push resistance capabilities to avoid excessive angle deviation of the swivel. At the same time, in order to prevent collision with the main beam, the edge of the triangular member is wrapped with elastic material to form an elastic anti-collision layer 14. The elastic material has a certain hardness and elasticity to protect the touched main beam part.

[0020] For details, please refer to Figure 4The swivel bracket foundation adopts an assembled foundation, and a crown beam hoop 15 and a pile top reinforcement 16 are provided on the top of the precast pile 5. The precast pile 5 is detachably connected to the steel crown beam 6 through the crown beam hoop 15; further, the steel crown beam 6 is welded by multiple groups of I-beams to provide a platform for the tire unit 9 to swivel and walk. The upper flange plate of the I-beam needs to be welded with a steel plate and anti-slip treatment is performed. The crown beam hoop 15 is welded on the lower flange plate of the I-beam. The crown beam hoop 15 is provided to quickly and reliably connect with the precast pile 5 foundation. The precast pile 5 adopts a steel pipe pile, and the pile is sunk to the designed depth by hammering or static pressure pile driving to meet the bearing capacity requirements. In order to prevent the pile top from yielding, the pile top position is poured with concrete or welded with a reinforcing steel plate for local reinforcement structure treatment; the top of the precast pile 5 and the hoop set under the steel crown beam 6 are bolted, which is easy to install and simple to dismantle. It can be reused, reduces the generation of construction waste and the occupation of cultivated land, and is green and environmentally friendly.

[0021] For details, please refer to Figure 2 or Figure 3 ; A plurality of steel balls 17 are rotatably installed on the top of the outer ring turntable 2, and the outer ring turntable 2 is in rotational contact with the bottom of the turntable 3 through the steel balls 17. A central rotating shaft 18 is installed at the bottom of the turntable 3, and the bottom of the central rotating shaft 18 is rotatably connected to the support frame 1, and the central rotating shaft 18 passes through the inner ball joint 4; further, the central rotating shaft 18 is made of special round steel, and grease is poured between it and the inner ball joint 4 to facilitate central rotation; while the central rotating shaft 18 satisfies the horizontal rotation of the turntable 3, it can effectively prevent the turntable 3 from rotating in the vertical direction; and the outer ring turntable 2 can effectively support the outer circular bottom of the turntable 3, and the steel balls 17 can further reduce the friction between the turntable 3 and the outer ring turntable 2; wherein the outer ring turntable 2 is an assembled steel product, which can be removed after the main beam is rotated into place and the side span is closed.

[0022] For details, please refer to Figure 7The corrugated steel web space frame structure includes two symmetrically arranged corrugated steel web composite beams 19, a lower support 20 located at the bottom of the corrugated steel web composite beam 19, a plurality of temporary cross beams 21 for connecting the two corrugated steel web composite beams 19, and a plurality of temporary vertical rods 22 for connecting the same vertical cross beam. The corrugated steel web composite beam 19 includes a plurality of sections of corrugated steel webs 23 connected to each other end to end; further, the adjusting support block 8 is used to support the lower support 20; the applicable scenarios of the corrugated steel web space frame structure can be single box single room or single box The multi-chamber composite box girder with corrugated steel webs is composed of two or more corrugated steel webs 23 combined by top and bottom plate concrete in cross section. When installing, the relatively independent corrugated steel webs 23 should be connected into a corrugated steel web space frame structure with load-bearing capacity through temporary cross beams 21 and temporary vertical bars 22 arranged between the corrugated steel webs 23. Then, the top plate formwork system and the bottom plate formwork system are installed using the corrugated steel web space frame structure, and the corrugated steel web space frame structure provides a platform and support for the reinforced concrete construction of the top and bottom plates of the box girder.

[0023] The main beam adopts the corrugated steel web space frame system to achieve long self-bearing of the corrugated steel web 23, without the need to erect a full-length bracket or use Bailey beams for load-bearing. Instead, a bracket support system is set up under the corrugated steel web 23 at intervals of several sections to complete the construction of multiple sections of the corrugated steel web 23, which simplifies the on-site operation process, reduces the safety risks of on-site operations, and has high efficiency and low cost.

[0024] A corrugated steel web composite bridge rotation construction method, using the corrugated steel web composite bridge rotation construction system for construction, comprising the following steps: S1. Main beam construction: install corrugated steel web 23 and construct transverse frame system; set up the movable bracket support system of corrugated steel web beam; install the top and bottom plate concrete formwork support system; complete the steel bar binding and concrete pouring; perform prestressing and grouting of prestressed cables; S2, rotation construction: install the central rotation mechanism at the main bridge pier, fix the top of the central rotation mechanism to the center of the bottom of the main beam, construct the rotation support foundation, install the beam section support rotation mechanism below the beam section with the middle cross beam on the main beam to be installed, install the rotation module in place, and install the lower support 20 on the corrugated steel web space frame body mechanism in place at the rotation module; release the temporary consolidation of the main beam and drop the beam; S3. Main beam rotation and installation: The main beam is rotated into place through the central rotation mechanism and / or the beam section support rotation mechanism; after the rotation is completed, the main beam is consolidated.

[0025] Specifically, the main beam construction in step S1 and the rotation construction in step S2 are carried out simultaneously.

[0026] The rotation method can be determined based on the on-site topography, route, construction period, etc. The central rotation mechanism and / or beam segment support rotation mechanism can be used to realize the rotation of the main beam, each of which has its advantages and disadvantages.

[0027] It should be noted that the phrases "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments", etc. mentioned in the specification indicate that the described embodiments may include certain features, structures or characteristics, but not every embodiment may include the certain features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing certain features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments, whether explicitly or not explicitly described.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A corrugated steel web composite bridge rotation construction system, characterized in that; The invention comprises a corrugated steel web space frame structure, a central rotating mechanism and / or a beam segment support rotating mechanism; the corrugated steel web space frame structure provides a working platform for the construction of the top and bottom plate concrete of the corrugated steel web concrete composite beam; the central rotating mechanism is installed on the top of the main bridge pier where the main beam is to be installed, and the central rotating mechanism comprises a support frame (1), an outer ring turntable (2) installed on the support frame (1), and a turntable (3); an inner ball joint (4) is provided between the outer ring turntable (2) and the turntable (3), and the turntable (3) is rotatably connected to the outer ring turntable (2) via the inner ball joint (4); the beam segment support rotating mechanism is installed below the beam segment with a middle cross beam on the main beam to be installed, and the beam segment support rotating mechanism comprises a swivel support foundation and a swivel support foundation installed on the swivel support foundation. The invention relates to a rotating module, wherein the rotating support foundation comprises a precast pile (5), a steel crown beam (6) installed on the top of the precast pile (5), the steel crown beam (6) being an arc-shaped body, the center of which coincides with the central axis of the main bridge pier, the rotating module comprises a rotating main support (7) and an adjusting support block (8) installed on the rotating main support (7); the rotating main support (7) adopts a steel frame or steel truss structure composed of steel sections, the rotating module provides a working platform and structural support for the prefabrication of a corrugated steel web space frame body, and a tire unit (9) is provided at the bottom end of the rotating main support (7); the adjusting support block (8) is used to support the bottom of the corrugated steel web space frame body mechanism; the corrugated steel web space frame body mechanism is the main structure of the main beam to be installed.

2. The corrugated steel web composite bridge rotation construction system according to claim 1 is characterized in that: It also includes a rotation control and monitoring mechanism, through which synchronous traction control of the main beam to be installed and dynamic monitoring of the rotation process are achieved; the rotation control and monitoring mechanism includes a traction device (12) symmetrically arranged on both sides of the turntable (3), a three-dimensional laser scanning device (10) and a data processing and control center (11); the traction device (12) uses an intelligent jack and a displacement meter.

3. The corrugated steel web composite bridge rotation construction system according to claim 2 is characterized in that: The steel crown beam (6) is provided with a rotation limiting mechanism for the main beam to be installed, the rotation limiting mechanism comprising a limiting device (13) and an elastic anti-collision layer (14), the elastic anti-collision layer (14) being arranged on a side of the limiting device (13) adjacent to the main beam to be installed.

4. The corrugated steel web composite bridge rotation construction system according to claim 1 is characterized in that: The swivel support foundation adopts an assembled foundation, the top of the prefabricated pile (5) is provided with a crown beam hoop (15) and a pile top reinforcement (16), and the prefabricated pile (5) is detachably connected to the steel crown beam (6) via the crown beam hoop (15).

5. The corrugated steel web composite bridge rotation construction system according to claim 1 is characterized in that: A plurality of steel balls (17) are rotatably mounted on the top of the outer ring turntable (2). The outer ring turntable (2) is in rotational contact with the bottom of the turntable (3) through the steel balls (17). A central rotating shaft (18) is mounted on the bottom of the turntable (3). The bottom of the central rotating shaft (18) is rotatably connected to the support frame (1). The central rotating shaft (18) passes through the inner ball joint (4).

6. The corrugated steel web composite bridge rotation construction system according to claim 1, characterized in that: The corrugated steel web space frame structure comprises two symmetrically arranged corrugated steel web composite beams (19), a lower support (20) located at the bottom of the corrugated steel web composite beam (19), a plurality of temporary cross beams (21) for connecting the two corrugated steel web composite beams (19), and a plurality of temporary vertical rods (22) for connecting the same vertical cross beam. The corrugated steel web composite beam (19) comprises a plurality of sections of corrugated steel webs (23) connected to each other end to end.

7. A method for constructing a rotation of a composite bridge with corrugated steel webs, using the rotation construction system of a composite bridge with corrugated steel webs according to any one of claims 1 to 6, comprising the following steps: S1. Main beam construction: install corrugated steel webs (23) and construct transverse frame systems; set up the movable bracket support system for corrugated steel web beams; install the top and bottom slab concrete formwork support system; complete the steel bar binding and concrete pouring; perform prestressing and grouting of prestressed cables; S2, rotation construction: the center rotation mechanism is installed at the main bridge pier, the top of the center rotation mechanism is fixedly connected to the center of the bottom of the main beam, the rotation support foundation is constructed, the beam section support rotation mechanism is installed below the beam section with the middle cross beam on the main beam to be installed, the rotation module is installed in place, wherein the lower support (20) on the corrugated steel web space frame body mechanism is installed in place at the rotation module; the temporary consolidation of the main beam is released and the beam is dropped; S3. Main beam rotation and installation: The main beam is rotated into place through the central rotation mechanism and / or the beam section support rotation mechanism; after the rotation is completed, the main beam is consolidated.

8. According to the rotation construction method of the corrugated steel web composite bridge in claim 7, the main beam construction in step S1 and the rotation construction in step S2 are carried out simultaneously.

Images