Steel structure bridge segment hoisting structure and technology

Abstract

The invention discloses a steel structure bridge section hoisting structure and process, and belongs to the field of load hoisting devices. Comprising a lifting appliance and a lifting rope arranged on the lifting appliance, a rotating assembly is arranged on the lifting appliance, a torsion assembly is further arranged between the lifting appliance and a bridge section, a flexible structure is further arranged between the bridge section and a sleeve, the flexible structure comprises a mounting column and an elastic piece arranged at the upper end of the mounting column, and the upper end of the elastic piece is fixedly connected with the lower end of the sleeve. The device has the beneficial effects that the torsion assembly is additionally arranged, when the rotating assembly rotates, the rotating force of the lifting appliance can be transmitted to the sleeve through the sliding rod, the whole bridge section is driven to rotate, and the direction of a lifted object can be rapidly and accurately adjusted; according to the device, a flexible structure is arranged between the bridge section and the sleeve. When the bridge section generates inertia, the elastic piece located between the mounting column and the sleeve can deform, so that the bridge section slightly shakes, and the flexible performance of a hoisted object can be improved.

Description

Technical Field

[0001] The invention relates to a steel structure bridge segment hoisting structure and process, belonging to the field of load hanging devices. Background Art

[0002] A bridge is a structure built to cross natural or artificial obstacles. It is built on rivers, lakes, and seas to allow vehicles and pedestrians to pass smoothly. Bridges are divided into many forms, and steel structure bridges are one of them. When building steel structure bridges, modular bridge segments need to be hoisted and then welded together, so hoisting equipment is needed.

[0003] The hoisting equipment currently used is generally a crane combined with a sling. The sling is generally connected to the bridge segment by a sling rope. The sling rope has only one or more contact points with the hoisted object. When the direction needs to be adjusted, the crane moves too fast, which will cause the bridge segment to shake, which will affect the time for the bridge segment to change direction. At the same time, manual replacement is required during installation, which can easily cause danger to construction workers.

[0004] The Chinese invention patent with application number CN201811091024.7 provides a hoisting auxiliary device for building bridge construction. The device can adjust the direction of the hoisted objects through a worm gear structure, which can speed up the installation efficiency. However, in actual use, since the suspension rope is a flexible structure, the force needs to be transmitted through the suspension rope when controlling the steering, so the transmission of this rotational force will be delayed. At the same time, it also has inertia, so if it rotates too fast, the bridge segment cannot accurately rotate to the required angle and direction. Summary of the invention

[0005] The purpose of the present invention is to provide a steel structure bridge segment hoisting structure and process, which can effectively solve the above-mentioned problems.

[0006] In order to solve the above technical problems, the present invention is achieved through the following technical solutions: It comprises a sling and a sling rope arranged on the sling, one end of the sling rope is connected to the bridge segment, and the other end is fixed to the sling; The sling is provided with a rotating assembly, the rotating assembly includes a mounting shell, a worm is provided in the mounting shell, the worm is connected with a turbine, the lower end of the turbine is keyed to a rotating shaft, and the rotating shaft is fixedly connected to the sling; A torsion assembly is also provided between the sling and the bridge segment, the torsion assembly includes a slide bar fixed at the lower end of the sling, a sleeve matching the diameter of the slide bar is provided on the bridge segment, and limit strips are evenly distributed on the outer circumference of the slide bar, and a limit groove matching the limit strip is provided in the sleeve; A flexible structure is also provided between the bridge segment and the sleeve. The flexible structure comprises a mounting column and an elastic member provided at the upper end of the mounting column. The upper end of the elastic member is fixedly connected to the lower end of the sleeve.

[0007] Further: the elastic member is a spring, the circumference of the spring is evenly distributed on the upper end of the mounting column, and a ball joint structure is arranged between multiple springs; the ball joint structure includes a ball joint bearing fixed to the middle part of the mounting column, a ball is rotatably arranged in the ball joint bearing, a connecting rod is arranged on the ball, the connecting rod is slidably arranged in a sleeve rod, and the sleeve rod is fixed to the lower end surface of the hanger.

[0008] Further: the sling includes a mounting plate, four mounting arms are provided on the mounting plate, and a rope adjustment device is provided on the mounting arm; the rope adjustment device includes a motor, a reduction gear box is provided at the output end of the motor, a take-up roller is provided at the output end of the reduction gear box, and the rope is wound on the take-up roller; a hinged plate is provided at the upper end of the mounting arm, a rotating shaft is provided on the hinged plate, and the rotating shaft is key-connected to the take-up roller.

[0009] Furthermore: a mounting ring is arranged at the end of the mounting arm, and a mounting tube for the suspension rope to pass through is arranged in the middle of the mounting ring.

[0010] Furthermore: a clamping device is also arranged between the suspension rope and the bridge segment, and the clamping device includes a mounting plate, and mounting grooves penetrating the upper and lower ends of the mounting plate are arranged near the two ends of the mounting plate, and a movable plate is slidably arranged in the mounting groove, and a first clamping plate and a second clamping plate are arranged on the movable plate, and an interlayer space is arranged between the first clamping plate and the second clamping plate.

[0011] Further: a driving device is provided on the movable plate, and the driving device includes a mounting rod installed on the movable plate, a screw is rotatably connected inside the mounting rod, one end of the screw is connected to the driving motor through a coupling, and a limiting block is fixed on the upper end of the mounting plate, the screw passes through the limiting block and is threadedly connected to the limiting block; limiting plates are also provided on both sides of the limiting block, and a limiting column is slidably provided in the limiting plate, and one end of the limiting column is fixed on the movable plate.

[0012] Furthermore: a vertical plate is arranged at the upper end of the edge of the mounting plate, a horizontal plate is arranged at the upper end of the vertical plate, a hook plate is arranged on the horizontal plate, a hook groove is arranged in the middle of the hook plate; reinforcing ribs are also arranged between the horizontal plate and the mounting plate.

[0013] Further: the hook plate is composed of a flat plate and an inclined plate obliquely arranged on the flat plate.

[0014] A steel structure bridge segment hoisting process: the first step: setting a temporary bracket at the longitudinal interface position of the steel structure; the second step: the crane hoists the bridge segments in sequence through the hoisting structure; the third step: matching the interfaces of the bridge segments; the fourth step: welding the bridge segments.

[0015] Preferred: In the fourth step: lift the bridge segment and align it with the previous segment; align the main web and main partition; install the top plate tension bolts and temporary connectors; measure the structure elevation and axis; adjust the front end elevation and axis of the beam; install the bottom plate tension bolts and temporary connectors; measure the front end elevation and axis of the bridge segment; adjust the front end elevation and axis of the beam to the designed position.

[0016] When the bridge segment is hoisted into place, the construction control team provides the beam segment precise matching elevation. Specifically, the torsion assembly and the suspension rope adjustment device in this device can be used to accurately position the beam segment. The beam segment precise matching elevation error is controlled within 2mm.

[0017] Before hoisting, the civil engineering baseline is rechecked, the bridge segment hoisting control line is measured, a steel plate block is welded on the outside of the bridge segment in place on the support, and a mark is made on the corresponding position on the outside of the bottom plate under the beam. When the truck crane lifts the bridge segment and drives it to the top of the installation position, it slowly drops the beam and stops when it is about 50mm away from the top surface of the temporary support. Then the construction workers refer to the bridge segment bottom plate edge line and mark released in advance to preliminarily position the bridge segment, and then continue to drop the hook to the installation position.

[0018] The beneficial effects are: 1. This device adds a rotating component on the basis of the traditional lifting device, which allows the direction of the lifted object to be adjusted; 2. This device adds a torque component. When the rotating component rotates, the rotational force of the hanger will be transmitted to the sleeve through the slide bar, and then the entire bridge segment will be driven to rotate through the sleeve. In this way, the rotational force is completely transmitted to the bridge segment by the torque component, and does not rely on the suspension rope, so there will be no delay in the transmission of rotational force, and the entire bridge segment will not shake.

[0019] 3. This device sets a flexible structure between the bridge segment and the sleeve. When the bridge segment generates inertia, the elastic member between the mounting column and the sleeve will deform, causing the bridge segment to shake slightly, which can improve the flexibility of the hoisted object.

[0020] 4. The device is equipped with a suspension rope adjustment device, through which the inclination direction of the bridge segment can be adjusted, so that the bridge segment can be quickly installed at the designated position; 5. A ball joint structure is provided in this device to prevent the bridge segment from shaking too much. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] For ease of explanation, the present invention is described in detail with reference to the following specific implementations and the accompanying drawings.

[0022] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a parts diagram of the torsion assembly of the present invention; Figure 3 It is a schematic diagram of the ball joint structure of the present invention; Figure 4 for Figure 1 Middle partial enlarged picture; Figure 5 It is a part diagram of the rotating assembly in the present invention; Figure 6 It is a bridge segment parts diagram of the present invention; Figure 7 for Figure 6 Middle partial enlarged picture; Figure 8 It is the installation slot parts diagram of the present invention; Fig. 9 for Figure 8 Middle partial enlarged picture; Fig.10 It is a parts diagram of the clamping device of the present invention.

[0023] Description of reference numerals: 1. Lifting device; 2. Lifting rope; 3. Rotating assembly; 31. Mounting shell; 32. Worm; 33. Turbine; 34. Rotating shaft; 4. Torque assembly; 41. Sliding rod; 42. Sleeve; 43. Limiting strip; 44. Flexible structure; 441. Mounting column; 442. Elastic member; 5. Ball joint structure; 51. Ball joint bearing; 52. Ball; 53. Connecting rod; 54. Sleeve rod; 6. Mounting plate; 7. Lifting rope adjustment device; 71. Motor; 72. Reducer; 73 , take-up roller; 74, hinged plate; 8, mounting cylinder; 9, clamping device; 91, mounting plate; 92, mounting groove; 93, movable plate; 94, first clamping plate; 95, second clamping plate; 96, vertical plate; 97, horizontal plate; 98, hook plate; 981, flat plate; 982, inclined plate; 99, reinforcing rib; 10, driving device; 101, mounting rod; 102, screw rod; 103, driving motor; 104, limit block; 105, limit plate; 106, limit column. DETAILED DESCRIPTION

[0024] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0025] It should be noted that, in the description of the present invention, unless otherwise specified, “plurality” means two or more than two; the orientations or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “inside”, “outside”, “front end”, “rear end”, “head” and “tail” are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] Furthermore, the terms “first,” “second,” “third,” etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

[0027] Meanwhile, in the description of the present invention, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] See also Figure 1-10 This is an embodiment of a steel structure bridge segment hoisting structure and process of the present invention. See also Figure 1 , comprising a sling 1 and a sling rope 2 arranged on the sling 1, one end of the sling rope 2 is connected to the bridge segment, and the other end is fixed to the sling 1; A hook is provided at one end of the lifting rope 2. When the bridge segment is to be lifted, the hook is hung on the hook on the bridge segment, and then the lifting device 1 is lifted by the crane to complete the lifting of the bridge segment; however, the bridge segment still needs to be lifted to the installation location. When the crane moves, the lifting device 1 lifting the bridge segment will inevitably rotate and cannot be moved to the installation area in a specified posture; therefore, a rotating component 3 for adjusting the posture of the bridge segment is added to the device.

[0029] See also Figure 5 The rotating assembly 3 includes a mounting shell 31, a worm 32 is arranged in the mounting shell 31, the worm 32 is connected to a turbine 33, the lower end of the turbine 33 is keyed to a rotating shaft 34, and the rotating shaft 34 is fixedly connected to the hanger 1; at the same time, a motor is arranged on the worm 32.

[0030] At this time, the crane will not be directly connected to the sling 1, but connected to the mounting shell 31; When the hanger 1 carrying the bridge segment moves to the installation area, the motor can be started, and the motor will drive the worm 32 to rotate, and the worm 32 will drive the rotating shaft 34 to rotate through the turbine 33, and the rotating shaft 34 will drive the hanger 1 located below to rotate. At this time, the hanger 1 will drive the entire bridge segment to adjust the angle, so that the bridge segment can rotate smoothly to the required direction, which is convenient for subsequent installation.

[0031] During actual use, the rotating component 3 drives the sling 1 to rotate, and the sling 1 transmits the rotational force to the bridge segment through the sling rope 2. After all, the sling rope 2 is not a rigid structure, so the transmission of this rotational force will be delayed, and it also has inertia. Therefore, if it rotates too fast, the bridge segment cannot accurately rotate to the required angle and direction; therefore, a torque component 4 is added to the present device to reduce the problem of rotational force transmission.

[0032] See also Figure 2 The torsion assembly 4 is arranged between the sling 1 and the bridge segment. The torsion assembly 4 includes a slide bar 41 fixed to the lower end of the sling 1. A sleeve 42 matching the diameter of the slide bar 41 is arranged on the bridge segment. Limiting strips 43 are evenly distributed on the outer circumference of the slide bar 41. Limiting grooves matching the limiting strips 43 are arranged in the sleeve 42. There are four limiting strips 43 and four matching limiting grooves. In this device, the depth of the slide bar 41 sliding into the sleeve 42 can be controlled by the length of the suspension rope 2. When the length of the suspension rope 2 is appropriate, the height of the sling 1 is limited when the crane lifts the rotating component 3; at this time, the slide bar 41 can match the sleeve 42; when the rotating component 3 rotates, the rotational force of the sling 1 will be transmitted to the sleeve 42 through the slide bar 41, and then the entire bridge segment is driven to rotate through the sleeve 42; with this arrangement, the rotational force is completely transmitted to the bridge segment by the torque component 4, and does not rely on the suspension rope 2, so there will be no delay in the transmission of rotational force, and the entire bridge segment will not shake.

[0033] However, in actual use, the rotational force is completely dependent on the torque assembly 4, which means that the bridge segment is always in a balanced horizontal state and cannot be tilted, because once the bridge segment tilts, the sleeve 42 will be damaged; Therefore, when the crane is in use and is carrying a heavier bridge segment, inertia is inevitable. This inertia will cause the bridge segment to shake when there is no sleeve 42 and the slide rod 41. However, with the sleeve 42 and the slide rod 41, this force will be transmitted to the sleeve 42 and the slide rod 41, and the sleeve 42 will be damaged over time. In order to reduce the scrap rate of the sleeve 42, the device sets a flexible structure 44 between the bridge segment and the sleeve 42.

[0034] The flexible structure 44 includes a mounting column 441 and an elastic member 442 disposed at the upper end of the mounting column 441 . The upper end of the elastic member 442 is fixedly connected to the lower end of the sleeve 42 . The mounting column 441 is fixed to the bridge segment.

[0035] See also Figure 3 When the bridge segment generates inertia, the elastic member 442 between the mounting column 441 and the sleeve 42 will be deformed, causing the bridge segment to shake slightly. This can avoid stress on the sleeve 42 and the slide rod 41, increase the service life of the sleeve 42 and the slide rod 41, and at the same time improve the flexibility of the bridge segment during installation.

[0036] In this device, the elastic member 442 is a spring, the circumference of the spring is evenly distributed on the upper end of the mounting column 441, and a ball joint structure 5 is arranged between multiple springs; the ball joint structure 5 includes a ball joint bearing 51 fixed to the middle part of the mounting column 441, a ball 52 is rotatably arranged in the ball joint bearing 51, a connecting rod 53 is arranged on the ball 52, the connecting rod 53 is slidably arranged in the sleeve rod 54, and the sleeve rod 54 is fixed to the lower end surface of the sling 1.

[0037] The purpose of the ball joint structure 5 in the device is to prevent the bridge segment from shaking too much. When the bridge segment shakes too much, one side of the spring is compressed and the other side is stretched, and the ball 52 in the ball joint structure 5 rotates. As the mounting column 441 tilts in the direction, the ball 52 rotates in the ball joint bearing 51, and the connecting rod 53 is also partially pulled out of the sleeve rod 54. When the connecting rod 53 is pulled out to the limit, the connecting rod 53 cannot be extended. At this time, due to the interference between the connecting rod 53 and the sleeve rod 54, the ball 52 will not rotate in the ball joint bearing 51, which can limit the shaking of the entire bridge segment. That is to say, the length of the connecting rod 53 extending from the sleeve rod 54 can limit the shaking amplitude of the bridge segment. Such a setting can prevent the bridge segment from shaking too much. At the same time, the spring in this device can also absorb part of the force generated by the shaking, thereby improving the stability of the bridge segment when shaking.

[0038] See also Figure 4 After the bridge segment is hoisted to the installation location, during the actual installation, the bridge segment will not be placed accurately at the designated location, but needs to be fine-tuned, and these fine-tunings are all performed by workers waiting at the installation location; the device is provided with a suspension rope adjustment device 7, through which the suspension rope adjustment device 7 can realize automatic adjustment of the inclination direction of the bridge segment, so as to facilitate the rapid installation of the bridge segment at the designated location; The lifting device 1 of the device is composed of a mounting plate 6 fixedly connected to a rotating shaft 34, and four mounting arms arranged on the outer ring of the mounting plate 6, and each mounting arm is provided with a lifting rope adjustment device 7; The rope adjustment device 7 includes an electric motor 71, a reduction box 72 is provided at the output end of the electric motor 71, a take-up roller 73 is provided at the output end of the reduction box 72, and the rope 2 is wound around the take-up roller 73; a hinged plate 74 is provided at the upper end of the mounting arm, a rotating shaft is provided on the hinged plate 74, and the rotating shaft is key-connected to the take-up roller 73.

[0039] After the bridge segment is hoisted to the installation position, the staff can select and control the length of the four suspension ropes 2 through the four motors 71, and controlling the length of the suspension ropes 2 can control the tilt direction of the bridge segment; for example, when the worker controls the motor 71 on one of the corners of the bridge segment, the motor 71 rotates, and through the deceleration and steering of the reduction box 72, the take-up roller 73 is driven to rotate slowly, and the released suspension rope 2 is retracted; at this time, the corner of the bridge segment will be lifted upward, causing the bridge segment to tilt; If the two motors 71 on the same side are controlled to retract the suspension ropes 2, one side of the bridge segment will tilt; Therefore, the suspension rope adjustment device 7 in the present device can simultaneously control a plurality of motors 71, so that the inclination direction of the bridge segment can be adjusted arbitrarily, thereby achieving the purpose of adjusting the posture of the bridge segment and facilitating the subsequent precise placement of the bridge segment in the installation area.

[0040] A mounting ring is arranged at the end of the mounting arm, and a mounting tube 8 for the suspension rope 2 to pass through is arranged in the middle of the mounting ring.

[0041] The mounting tube 8 of the device is made of wear-resistant metal material, the purpose of which is to facilitate the winding and unwinding of the suspension rope 2.

[0042] See also Figure 6-10 A clamping device 9 is also provided between the suspension rope 2 and the bridge segment of the device; the clamping device 9 is provided in consideration of the special structure of the bridge segment; In order to stably and conveniently lift the bridge segment, the upper edge plate of the bridge segment is selected as the lifting bearing point; for the fixation of the lifting rope 2 and the upper edge plate of the bridge segment, the present device adopts a clamping device 9 as the connecting medium between the lifting rope 2 and the bridge segment, so that the bridge segment can be lifted more stably by the lifting rope 2.

[0043] The clamping device 9 includes a mounting plate 91, and mounting grooves 92 that penetrate the upper and lower ends of the mounting plate 91 are arranged near the two ends of the mounting plate 91. A movable plate 93 is slidably arranged in the mounting groove 92, and a first clamping plate 94 and a second clamping plate 95 are arranged on the movable plate 93, and an interlayer space is arranged between the first clamping plate 94 and the second clamping plate 95.

[0044] The specific operation of the clamping device 9 of the present device to clamp the upper edge plate of the bridge segment is: move the entire clamping device 9 to the top of the bridge segment, and then align the interlayer space between the first clamping plate 94 and the second clamping plate 95 with the upper edge plate of the bridge segment, and then operate the movable plate 93 to move in the installation groove 92. At this time, the upper edge plate of the bridge segment will be moved into the interlayer space until the side of the upper edge plate rests on the movable plate 93. At this time, the clamping of the bridge segment is completed; lifting can be carried out, and at the same time, the first clamping plate 94 located below can also bear the weight of the bridge segment during lifting, and the entire bridge segment is lifted.

[0045] The driving device 10 specifically drives the moving plate 93; The driving device 10 includes a mounting rod 101 installed on the movable plate 93, and a screw 102 is rotatably connected inside the mounting rod 101, and the screw 102 is threadedly connected to the mounting rod 101; one end of the screw 102 is connected to the driving motor 103 through a coupling, and a limiting block 104 is fixed at the upper end of the mounting plate 91, and the screw 102 passes through the limiting block 104 and is threadedly connected to the limiting block 104; limiting plates 105 are also arranged on both sides of the limiting block 104, and a limiting column 106 is slidably arranged in the limiting plate 105, and one end of the limiting column 106 is fixed on the movable plate 93.

[0046] When driving, the driving motor 103 works, driving the screw 102 to rotate, and the screw 102 rotates inside the mounting rod 101. At this time, the mounting rod 101 will move linearly under the restriction of the limit column 106 and the limit plate 105, and the movable plate 93 will move toward the upper edge plate of the bridge segment, completing the clamping operation of the upper edge plate of the bridge segment.

[0047] A vertical plate 96 is provided at the upper end of the edge of the mounting plate 91 , a horizontal plate 97 is provided at the upper end of the vertical plate 96 , a hook plate 98 is provided on the horizontal plate 97 , and a hook groove is provided in the middle of the hook plate 98 ; a reinforcing rib 99 is also provided between the horizontal plate 97 and the mounting plate 91 .

[0048] The vertical plate 96 is provided for setting the horizontal plate 97, and the horizontal plate 97 is provided for installing the hook plate 98. The groove in the middle of the hook plate 98 is used to match the hook on the lifting rope 2; when actually used, the hook of the lifting rope 2 can be hooked on the groove to carry out lifting.

[0049] The hook plate 98 is composed of a flat plate 981 and an inclined plate 982 obliquely arranged on the flat plate 981; the groove is arranged on the inclined plate 982; The flat plate 981 is installed on the horizontal plate 97, and the function of the inclined plate 982 is to facilitate the connection between the hook of the lifting rope 2 and the groove.

[0050] A steel structure bridge segment hoisting process: firstly, a temporary bracket is set at the longitudinal interface of the steel structure; then, the crane hoists the bridge segments in sequence through the hoisting structure of the device; then, the remaining segments are hoisted to match the interfaces of the bridge segments; Step 4: Welding the bridge segments.

[0051] For the fourth step: before welding, the position of the bridge segment needs to be fine-tuned, which can be achieved through this hoisting structure, and can also be achieved by using a jack; Lift the bridge segment and align it with the previous segment; align the main web and main partition; install the top plate tension bolts and temporary connectors; measure the structure elevation and axis; adjust the front end elevation and axis of the beam; install the bottom plate tension bolts and temporary connectors; measure the front end elevation and axis of the bridge segment; adjust the front end elevation and axis of the beam to the designed position.

[0052] When the bridge segment is hoisted into place, the construction control team provides the beam segment precise matching elevation. Specifically, the torsion assembly and the suspension rope adjustment device in this device can be used to accurately position the beam segment. The beam segment precise matching elevation error is controlled within 2mm.

[0053] Before hoisting, the civil engineering baseline is rechecked, the bridge segment hoisting control line is measured, a steel plate block is welded on the outside of the bridge segment in place on the support, and a mark is made on the corresponding position on the outside of the bottom plate under the beam. When the truck crane lifts the bridge segment and drives it to the top of the installation position, it slowly drops the beam and stops when it is about 50mm away from the top surface of the temporary support. Then the construction workers refer to the bridge segment bottom plate edge line and mark released in advance to preliminarily position the bridge segment, and then continue to drop the hook to the installation position.

[0054] After the steel box girder is installed to the predetermined position, if there is a deviation from the designed position, precise adjustment is required. The adjustment is carried out in the order of plane position first and then elevation. Taking the longitudinal beam adjustment as an example, the specific operation method is as follows: (1) Method for accurate adjustment of plane position of steel box girder: Reaction blocks are welded on the top plate and bottom web of the installed steel box girder and the steel box girder to be adjusted, and then a 20T jack is installed between the two reaction blocks. The jacking force of the jack is used to adjust the transverse and longitudinal positions of the box girder. When the first longitudinal beam is installed, the transverse adjustment is performed by setting a reaction frame on the temporary support distribution beam.

[0055] When adjusting the steel box girder longitudinally, it is necessary to weld the tooling (or reaction frame) first and use the side push jack to adjust the box girder horizontally. After the position of the steel box girder is adjusted, it is connected to the installed steel box girder top plate through a horse plate, and the beam body is welded to the support frame. The bridge deck is fine-tuned and inspected in sections to check the plane position and plane and elevation curves of the bridge. Welding operations can only be carried out after passing the inspection.

[0056] After the bridge bearing is installed on the pad stone, the steel plate on the bearing is connected with the leveling steel plate. After the beam is dropped, the leveling steel plate is connected to the steel box beam by welding.

[0057] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A steel structure bridge segment hoisting structure, characterized in that: The invention comprises a sling (1) and a sling rope (2) arranged on the sling (1), wherein one end of the sling rope (2) is connected to a bridge segment, and the other end is fixed to the sling (1); wherein a rotating assembly (3) is arranged on the sling (1), and the rotating assembly (3) comprises a mounting shell (31), a worm (32) is arranged inside the mounting shell (31), a turbine (33) is connected to the worm (32), a rotating shaft (34) is keyed at the lower end of the turbine (33), and the rotating shaft (34) is fixedly connected to the sling (1); A torsion assembly (4) is also provided between the sling (1) and the bridge segment, and the torsion assembly (4) includes a slide bar (41) fixed at the lower end of the sling (1), and a sleeve (42) matching the diameter of the slide bar (41) is provided on the bridge segment, and limit strips (43) are evenly distributed on the outer circumference of the slide bar (41), and a limit groove matching the limit strip (43) is provided in the sleeve (42); a flexible structure (44) is also provided between the bridge segment and the sleeve (42), and the flexible structure (44) includes a mounting column (441) and an elastic member (442) provided at the upper end of the mounting column (441), and the upper end of the elastic member (442) is fixedly connected to the lower end of the sleeve (42).

2. The steel structure bridge segment hoisting structure according to claim 1 is characterized in that: The elastic member (442) is a spring, the circumference of the spring is evenly distributed on the upper end of the mounting column (441), and a ball joint structure (5) is arranged between the plurality of springs; the ball joint structure (5) comprises a ball joint bearing (51) fixed to the middle part of the mounting column (441), a ball (52) is rotatably arranged in the ball joint bearing (51), a connecting rod (53) is arranged on the ball (52), the connecting rod (53) is slidably arranged in a sleeve rod (54), and the sleeve rod (54) is fixed to the lower end surface of the sling (1).

3. The steel structure bridge segment hoisting structure according to claim 2 is characterized in that: The sling (1) comprises a mounting plate (6), four mounting arms are arranged on the mounting plate (6), and a sling rope adjusting device (7) is arranged on the mounting arm; the sling rope adjusting device (7) comprises a motor (71), a reduction box (72) is arranged at the output end of the motor (71), a take-up roller (73) is arranged at the output end of the reduction box (72), and the sling rope (2) is wound around the take-up roller (73); a hinged plate (74) is arranged at the upper end of the mounting arm, a rotating shaft is arranged on the hinged plate (74), and the rotating shaft is key-connected to the take-up roller (73).

4. The steel structure bridge segment hoisting structure according to claim 3 is characterized in that: A mounting ring is provided at the end of the mounting arm, and a mounting tube (8) is provided in the middle of the mounting ring for the suspension rope (2) to pass through.

5. The steel structure bridge segment hoisting structure according to claim 4 is characterized in that: A clamping device (9) is also provided between the suspension rope (2) and the bridge segment, and the clamping device (9) comprises a mounting plate (91), and mounting grooves (92) penetrating the upper and lower ends of the mounting plate (91) are provided near both ends of the mounting plate (91), and a movable plate (93) is slidably provided in the mounting groove (92), and a first clamping plate (94) and a second clamping plate (95) are provided on the movable plate (93), and a mezzanine space is provided between the first clamping plate (94) and the second clamping plate (95).

6. The steel structure bridge segment hoisting structure according to claim 5 is characterized in that: A driving device (10) is arranged on the movable plate (93), and the driving device (10) comprises a mounting rod (101) mounted on the movable plate (93), a screw rod (102) being rotatably connected inside the mounting rod (101), one end of the screw rod (102) being connected to the driving motor (103) via a coupling, and a limit block (104) being fixed on the upper end of the mounting plate (91), the screw rod (102) passing through the limit block (104) and being threadedly connected to the limit block (104); limit plates (105) are also arranged on both sides of the limit block (104), a limit column (106) is slidably arranged in the limit plate (105), and one end of the limit column (106) is fixed to the movable plate (93).

7. The steel structure bridge segment hoisting structure according to claim 6 is characterized in that: A vertical plate (96) is provided at the upper end of the edge of the mounting plate (91), a horizontal plate (97) is provided at the upper end of the vertical plate (96), a hook plate (98) is provided on the horizontal plate (97), and a hook groove is provided in the middle of the hook plate (98); and a reinforcing rib (99) is also provided between the horizontal plate (97) and the mounting plate (91).

8. The steel structure bridge segment hoisting structure according to claim 7 is characterized in that: The hook plate (98) is composed of a flat plate (981) and an inclined plate (982) obliquely arranged on the flat plate (981).

9. A steel structure bridge segment hoisting process, characterized in that: The hoisting structure described in any one of claims 1 to 8 above, the hoisting process adopted by the hoisting structure includes: the first step: temporary support, setting a temporary bracket at the longitudinal interface of the steel structure; the second step: the crane hoists the bridge segments in sequence through the hoisting structure; the third step: matching the interfaces of the bridge segments; the fourth step: welding the bridge segments.

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