Bridge counter-hanging construction platform and construction method thereof

Abstract

This invention relates to the technical field of bridge inverted lifting construction platforms, specifically disclosing a bridge inverted lifting construction platform and its construction method. The platform comprises a reference platform assembled from multiple platforms to be installed. Each platform includes a crossbeam and longitudinal beams located at both ends of the crossbeam. An auxiliary device is provided on the reference platform. The auxiliary device includes a fixed frame and two rotatably cooperating auxiliary rods. Each auxiliary rod has an auxiliary block and an adjusting component connected to both ends. The auxiliary blocks are slidably mounted on the fixed frame. Initially, one end of the auxiliary rod is tilted downwards. When the platform to be installed is lifted upwards, the adjusting component engages with the crossbeam of the platform to be installed, causing the platform to continuously move upwards and drive the auxiliary rods to rotate, thus causing the two adjusting components to move synchronously in opposite directions. When the two adjusting components engage with the longitudinal beams, the platform to be installed and the reference platform are aligned in the same vertical plane. The bridge inverted lifting construction platform and its construction method of this invention improve construction efficiency and installation accuracy.

Description

Technical Field

[0001] This invention relates to the technical field of bridge inverted lifting construction platforms, and specifically to a bridge inverted lifting construction platform and its construction method. Background Technology

[0002] A bridge inverted construction platform is a suspended working platform formed below the bridge by suspending the operating platform at the bottom of the bridge superstructure using components such as slings. It is often used for construction scenarios such as maintenance, reinforcement, and inspection of bridges in high-altitude, water, or complex terrain where it is not possible to erect full-span scaffolding. It can provide a safe and reliable operating space for workers while ensuring the normal passage of the bridge.

[0003] Patent application CN121381504A discloses a hoisting module, hoisting system, and construction method for constructing cast-in-place beams across intersections. The hoisting module includes an inverted steel frame, a bottom platform, multiple anti-jacking devices, and multiple lifting rods. The inverted steel frame is supported by two segmental beams. Multiple first lifting holes are distributed on the inverted steel frame. The bottom platform is provided with second lifting holes at positions corresponding to each of the first lifting holes. The upper end of each lifting rod passes through a first lifting hole, and the lower end passes through a second lifting hole. Locking nuts are threaded to the upper and lower ends of each lifting rod. Anti-jacking devices are arranged between each segmental beam and the bottom platform. By positioning the hanger rods, they are made to bear axial tension. At the same time, multiple steel beams are connected by an intermediate steel frame to form an inverted steel frame, and a bottom platform made of various types of steel is fixed at the bottom of the wooden board. During construction, the inverted steel frame is first positioned and installed on the segmental beams. Then, the length of the hanger rods is determined according to the different requirements of the inverted steel frame. Finally, the hanger rods are installed and the inverted steel frame is connected to the bottom platform.

[0004] However, this solution has the following problems. For the construction of the solid web section with high clearance on shore, taking the construction of the transverse tie beam on the water as a typical application scenario, the conventional inverted platform installation process adopts a piece-by-piece hoisting method. First, a single inverted platform is hoisted to the design elevation and fixed, and then the next inverted platform is raised to the same elevation and docked and fixed with the already fixed platform. Subsequent inverted platforms are installed in the same cycle. However, since this hoisting process relies on winches as the core lifting equipment, coupled with multiple external interferences such as high-altitude wind loads at the work site, the inverted platform in the suspended state is difficult to maintain a stable posture during hoisting, relocation and precise elevation adjustment. It is prone to irregular swaying, which will result in horizontal and vertical spatial position deviations. This deviation will directly cause the pre-set connection interface of adjacent inverted platforms to fail to fit precisely, which not only significantly increases the difficulty of platform docking, prolongs the splicing and fixing operation time, and disrupts the continuity and rhythm of the overall construction process, but also reduces the installation accuracy of platform splicing nodes and the reliability of structural connections. Summary of the Invention

[0005] This invention provides a bridge inverted lifting construction platform and its construction method, aiming to solve the problem in related technologies where the inverted lifting platform is prone to shaking, leading to difficulties in docking and alignment, which affects construction efficiency and installation accuracy.

[0006] In a first aspect, the present invention provides a bridge inverted hoisting construction platform, comprising a reference platform assembled from multiple platforms to be installed. Each platform to be installed includes a crossbeam and longitudinal beams located at both ends of the crossbeam. An auxiliary device is provided on the reference platform. The auxiliary device includes a fixed frame mounted on the reference platform and two intersecting auxiliary rods that are rotatably engaged at their intersection. Each auxiliary rod has an auxiliary block and an adjusting component movably connected to its two ends. The auxiliary block is slidably mounted on the fixed frame. In the initial state, one end of the auxiliary rod connected to the adjusting component is tilted downward. When the platform to be installed is hoisted upward, the adjusting component engages with the crossbeam of the platform to be installed, and the platform to be installed continues to move upward, driving the auxiliary rod to rotate and causing the two adjusting components to move synchronously in opposite directions. When the two adjusting components engage with the longitudinal beams, the platform to be installed and the reference platform are in the same vertical plane.

[0007] The effect is that by setting auxiliary devices on the reference platform, the position of the platform to be installed is adjusted during hoisting, so that after the platform to be installed moves to the same height as the reference platform, the ends of the two are aligned for subsequent connection. Specifically, initially, the end of the auxiliary rod connected to the adjusting component tilts downward. When the platform to be installed is about to reach the designated height, the crossbeam of the platform to be installed will cooperate with the adjusting component. As the platform to be installed continues to move upward, the distance between it and the reference platform gradually decreases, thereby driving the auxiliary rod to rotate. At the same time, the included angle between the two auxiliary rods increases, causing the two auxiliary components to move away synchronously until the two adjusting components cooperate with the longitudinal beams on the platform to be installed, so that the center of the platform to be installed corresponds to the center of the reference platform. At this time, the two are in the same vertical plane, eliminating swaying and positioning deviation during hoisting, so as to facilitate subsequent docking, improve construction efficiency and installation accuracy.

[0008] Preferably, the adjusting component includes an adjusting seat and a correcting rod and a pull rod connected to the adjusting seat and perpendicular to each other. The correcting rod abuts against the side of the crossbeam near the reference platform, and the pull rod abuts against the upper side of the crossbeam. A locking block is slidably mounted on the side of the pull rod near the crossbeam. An elastic element is provided at the connection between the locking block and the pull rod to connect the two. The elastic element is used to drive the locking block to move towards the crossbeam. When both the correcting rod and the pull rod abut against the crossbeam, the locking block abuts against the side of the crossbeam away from the correcting rod.

[0009] The effect is that, by setting up the correction rod and the tie rod, as the platform to be installed moves upward, the two adjusting seats move away from each other, causing the correction rod to move until it abuts against the longitudinal beam. When both correction rods abut against the longitudinal beam, the platform to be installed is positioned. At the same time, the tie rod abuts against the side of the crossbeam away from the correction rod, thereby improving the stability of the fit between the correction rod and the crossbeam.

[0010] Preferably, the fixing frame includes a fixing rod, an auxiliary block is slidably mounted on the fixing rod, an auxiliary shaft is provided on the auxiliary block in the vertical direction, an auxiliary sleeve is rotatably sleeved on the outside of the auxiliary shaft, the auxiliary rod is rotatably connected to the auxiliary sleeve, an installation sleeve is rotatably provided on the adjusting seat, and the end of the auxiliary rod away from the auxiliary sleeve is rotatably connected to the installation sleeve.

[0011] Preferably, a gear is rotatably mounted on the fixed rod, and a rack is mounted on the auxiliary block along its sliding direction. The racks on the two auxiliary blocks are located on both sides of the gear and mesh with the gear.

[0012] The effect is that by setting a gear between the two racks, the racks drive the gear to rotate when the auxiliary blocks move. Since the gear meshes with the two racks at the same time, the two auxiliary blocks move synchronously, so that the center of the two auxiliary rods and the two correction rods always corresponds to the center of the reference platform, so as to correct the position of the platform to be installed.

[0013] Preferably, a slide rod is slidably provided on the adjusting seat, and the slide rod slides in a direction perpendicular to the rotation axis of the mounting sleeve. An elastic element II connected to the slide rod is provided on the adjusting seat, and a correction rod is perpendicular to the slide rod and connected to the slide rod.

[0014] Its effect is that by setting up the second elastic element, the correction rod is prevented from rigidly contacting the longitudinal beam. At the same time, as the platform to be installed continues to move, the second elastic element is gradually compressed, thereby gradually reducing the swaying amplitude of the platform to be installed until the platform to be installed stops swaying or sways within a specified range, so as to carry out subsequent docking.

[0015] Preferably, an adjusting handwheel is rotatably mounted on the fixed frame, and the rotating shaft of the adjusting handwheel is coaxially connected to the gear.

[0016] Its effect is that after the platform to be installed and the reference platform are moved to the same height, the gear can be driven to rotate by rotating the adjustment handwheel, which in turn drives the auxiliary rod to rotate a second time. Since there is an elastic element two between the correction rod and the adjustment seat, the correction rod can compress the elastic element two again. At the same time, the platform to be installed is pulled closer to the reference platform by the locking block, so that the ends of the two are aligned and the final positioning is achieved.

[0017] Preferably, the fixed rod has multiple limiting grooves along the sliding direction of the auxiliary block, and the auxiliary block is slidably assembled with a limiting block and an elastic element three that cooperates with the limiting block. The elastic element three is used to drive the limiting block to engage with the limiting groove, and the side of the limiting block away from the other auxiliary block is provided with a guide slope.

[0018] Preferably, a guide rod is provided on the side of the limiting block away from the limiting groove, and the end of the guide rod away from the limiting block extends to the outside of the auxiliary block.

[0019] Preferably, the auxiliary sleeve is provided with an inclined top, the auxiliary block is provided with a baffle, the auxiliary rod is located between the inclined top and the baffle, the auxiliary rod is in an inclined state when it abuts against the inclined top, and is in a horizontal state when it abuts against the baffle, and the platform to be installed and the reference platform are on the same horizontal plane.

[0020] Secondly, the present invention provides a bridge inverted suspension construction method, which uses the above-mentioned bridge inverted suspension construction platform and includes the following steps:

[0021] After the platform to be installed is hoisted to the designated position and fixed to form a reference platform, the fixing frame is placed on the reference platform and the auxiliary rod hangs down naturally;

[0022] As the loading platform moves upward, the crossbeam on the loading platform abuts against the correction rod and the tie rod, while the locking block abuts against the side of the crossbeam away from the correction rod.

[0023] As the platform to be installed continues to move, the lower end of the auxiliary rod moves upward accordingly. At the same time, the two auxiliary rods rotate, causing the two correction rods to move away from each other until the correction rods abut against the longitudinal beam on the platform to be installed.

[0024] After the loading platform and the reference platform are moved to the same height, rotate the adjusting handwheel. The adjusting handwheel will drive the auxiliary rod to rotate again, and the loading platform will move closer to the reference platform through the pull rod and the locking block.

[0025] Its effect is that when the platform to be installed is about to be moved to the designated height, the position of the platform to be installed is corrected by the correction rod. At the same time, after the platform to be installed is moved to the same height as the reference platform, the platform to be installed can be pulled closer to the reference platform by rotating the adjustment handwheel for final positioning and docking.

[0026] Beneficial effects:

[0027] During the hoisting of the platform to be installed, this invention works in conjunction with a correction rod and a tie rod. As the platform continues to rise, the auxiliary rod rotates relative to the auxiliary sleeve, ensuring that the correction rod and tie rod remain aligned with the platform. Simultaneously, the rotation between the two auxiliary rods causes the correction rod to align with the longitudinal beam of the platform to correct its position, preventing swaying during hoisting. Furthermore, after the platform reaches the designated height, the position of the platform can be adjusted again by rotating the auxiliary rod using a handwheel. This allows for position control and tiered adjustment throughout the hoisting process, effectively mitigating positional deviations, ensuring precise alignment between the platform and the reference platform, and improving overall construction efficiency. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0029] Figure 2 This is a schematic diagram of the structure of the reference platform and the platform to be installed in this invention.

[0030] Figure 3 This is a schematic diagram of the auxiliary rod in this invention.

[0031] Figure 4 This is a schematic diagram of the cross connection of the two auxiliary rods in this invention.

[0032] Figure 5 yes Figure 4 A magnified view of a portion of point A in the middle.

[0033] Figure 6 This is a schematic diagram of the adjusting component in this invention.

[0034] Figure 7 This is a schematic diagram of the slide bar in this invention.

[0035] Figure 8 This is a partially exploded schematic diagram of the auxiliary shaft and auxiliary sleeve in this invention.

[0036] Figure 9 This is a schematic diagram of the gear and rack mating structure in this invention.

[0037] Figure 10 This is a schematic diagram of the limiting block in this invention.

[0038] Figure label:

[0039] 01. Bridge body; 02. Winch; 1. Platform to be installed; 11. Crossbeam; 12. Longitudinal beam; 2. Reference platform; 3. Fixing frame; 31. Fixing rod; 311. Limiting groove; 4. Auxiliary rod; 5. Auxiliary block; 51. Auxiliary shaft; 52. Gear; 6. Adjusting component; 61. Adjusting seat; 611. Slide rod; 612. Elastic component two; 613. Mounting sleeve; 62. Correction rod; 63. Tie rod; 631. Locking block; 632. Elastic component one; 7. Auxiliary sleeve; 71. Sloping top; 72. Baffle; 8. Gear; 81. Adjusting handwheel; 9. Limiting block; 91. Elastic component three; 92. Guide rod. Detailed Implementation

[0040] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0041] This invention discloses a bridge inverted lifting construction platform.

[0042] Reference Figures 1 to 10 The bridge inverted hoisting construction platform includes a reference platform 2, which is formed by splicing multiple platforms 1 to be installed. Among them, the platform unit that has been installed and fixed in place is defined as the reference platform 2, and the platform unit in the hoisting construction stage is the platform 1 to be installed. After the platform 1 to be installed is accurately hoisted to the design elevation that is flush with the reference platform 2 and fixedly connected, it is automatically incorporated into the reference platform 2 and becomes its component. The subsequent platforms 1 to be installed are all constructed in sequence with the reference platform 2 as the installation reference.

[0043] Reference Figure 1 The hoisting operation of the platform to be installed 1 is carried out on the bridge deck of the bridge body 01. First, the winch 02 is placed at the designated position on the bridge deck of the bridge body 01. Then, steel wire ropes are threaded through the pre-set openings on the bridge deck so that the lower end of the steel wire ropes is reliably connected to the corresponding lifting point of the platform to be installed 1 below. Each platform to be installed 1 is equipped with two winches 02 and has two independent lifting points. The platform to be installed 1 is lifted smoothly and accurately by the synchronous traction operation of the two winches 02. After the reference platform 2 is fully spliced ​​and installed, aluminum alloy walkway plates are fully laid on its top surface to form a working surface, and edge guardrails are continuously set along the perimeter to build a safe and reliable operation protection system.

[0044] Reference Figure 2 , Figure 3 , Figure 4 The platform to be installed 1 is composed of multiple sets of crossbeams 11 and longitudinal beams 12 located at both ends of each crossbeam 11, forming a regular load-bearing frame structure. The reference platform 2 is equipped with an auxiliary device, which can adjust the spatial posture and installation position of the platform to be installed 1 during the hoisting operation. After the platform to be installed 1 is moved to the design elevation and the positioning calibration is completed, it can be docked and reliably connected with the reference platform 2. This effectively reduces the time spent on deviation correction during the hoisting docking process, simplifies the assembly and connection process, and thus significantly improves the overall construction efficiency.

[0045] Reference Figure 2 , Figure 3 , Figure 4The auxiliary device includes a fixed frame 3 and auxiliary rods 4. The fixed frame 3 has a slot that matches the crossbeam 11 on the reference platform 2. During assembly, simply align the slot with the crossbeam 11 on the reference platform 2 and engage it to quickly position the fixed frame 3 on the reference platform 2. Two auxiliary rods 4 are provided, arranged in a cross configuration. They rotate at the intersection using a rotating structure, allowing the two auxiliary rods 4 to move synchronously and adjust in opposite directions. Each auxiliary rod 4 has a movable connection at both ends, connecting an auxiliary block 5 and an adjusting component 6 respectively. The auxiliary block 5 and the fixed frame 3 use a sliding assembly structure, allowing the auxiliary block 5 to slide smoothly along a preset trajectory of the fixed frame 3. This provides flexible support for the rotation of the auxiliary rod 4 and compensates for displacement during rotation, ensuring smooth movement and preventing jamming or other issues that could affect the adjustment effect.

[0046] When the device is not initially in operation, one end of the auxiliary rod 4 connected to the adjusting component 6 naturally tilts downwards. This initial posture ensures that the adjusting component 6 and the crossbeam 11 of the platform 1 to be installed make precise contact and fit during the hoisting and moving process, paving the way for subsequent adjustment actions. As the platform 1 to be installed is slowly moved upwards by the hoisting equipment, the hoisting force drives the platform 1 to gradually approach the reference platform 2. When the platform 1 to be installed is about to move to the same height as the reference platform 2, the adjusting component 6 will first contact and fit with the crossbeam 11 of the reference platform 2. As the platform 1 to be installed continues to be hoisted upwards, the upward force it generates will be transmitted to the auxiliary rod 4, driving the two cross-arranged auxiliary rods 4 to rotate synchronously around the rotating structure at the intersection.

[0047] During the rotation of the auxiliary rods 4, since both ends of each auxiliary rod 4 are movable and the auxiliary blocks 5 are subject to the sliding constraint of the fixed frame 3, the rotation of the auxiliary rods 4 will synchronously drive the auxiliary blocks 5 at both ends to slide, and at the same time drive the adjusting parts 6 at the ends of the two auxiliary rods 4 to move in opposite directions. During the opposite movement, the adjusting parts 6 gradually adjust their own posture and position until both adjusting parts 6 form a stable engagement with the longitudinal beam 12 of the reference platform 2. When the adjusting parts 6 are fully engaged with the longitudinal beam 12, the rotation of the auxiliary rods 4 is limited and constrained by the longitudinal beam 12; at this time, the auxiliary rods 4 apply a guiding force to the platform 1 to be installed during hoisting through the adjusting parts 6, driving the platform 1 to adjust its horizontal posture so that it is on the same horizontal plane as the reference platform 2, ensuring the horizontality requirements of the assembly of the two, and laying a solid foundation for the subsequent formal assembly of the two.

[0048] Reference Figure 4 , Figure 5 , Figure 6 , Figure 7The adjusting component 6 includes an adjusting seat 61, a correcting rod 62, and a pull rod 63. Both the correcting rod 62 and the pull rod 63 are connected to the adjusting seat 61. The correcting rod 62 is perpendicular to the pull rod 63. A mounting sleeve 613 is rotatably mounted on the adjusting seat 61. An auxiliary rod 4 is rotatably connected to the mounting sleeve 613, meaning that the auxiliary rod 4 is rotatably engaged with the adjusting seat 61 through the mounting sleeve 613, and the axis of rotation of the auxiliary rod 4 on the mounting sleeve 613 is perpendicular to the axis of rotation of the mounting sleeve 613 on the adjusting seat 61. A locking block 631 is slidably mounted on the pull rod 63. An elastic element 632, which is a spring, is provided at the connection between the locking block 631 and the pull rod 63 to push the locking block 631 to move.

[0049] In this embodiment, the positioning adjustment achieved by the correction rod 62 and the locking block 631 is a fine-tuning, which can make small-scale and precise corrections to the docking posture of the platform 1 to be assembled. During the process of the platform 1 to be assembled moving towards the assembly station and forming a cooperation with the adjusting component 6, the correction rod 62 first smoothly abuts against the side wall of the crossbeam 11 near the reference platform 2, while the pull rod 63 simultaneously abuts against and supports the upper surface of the crossbeam 11. After the correction rod 62 completes the lateral abutment and the pull rod 63 achieves the dual positioning of upper support, the locking block 631 moves to the outside of the pull rod 63 under the continuous pushing force of the elastic component 632 and abuts against the other side wall of the crossbeam 11 away from the correction rod 62.

[0050] As the platform 1 continues to rise and advance, the distance between it and the reference platform 2 gradually decreases. The corresponding auxiliary rod 4 then rotates adaptively, causing the two correction rods 62 on both sides to move away from each other. The centers of the two correction rods 62 always correspond to the center of the reference platform 2. When the two correction rods 62 evenly abut against the longitudinal beam 12 on the platform 1, they can accurately correct the overall posture of the platform 1 and effectively constrain the lateral displacement of the platform, significantly reducing the swaying and deviation of the platform 1 during the lifting process. Simultaneously, the locking block 631 maintains a tight abutment against the side of the crossbeam 11, allowing the correction rods 62 to stably cooperate with the platform 1, reducing the swaying of the platform 1 during its upward movement. This ensures high-precision alignment between the platform 1 and the reference platform 2, laying a reliable positional accuracy foundation for subsequent fastening, splicing, and other docking processes.

[0051] Meanwhile, since an installation sleeve 613 is provided between the auxiliary rod 4 and the adjusting seat 61, the adjusting seat 61 can rotate relative to the auxiliary rod 4 when the correction rod 62 and the pull rod 63 move relative to the crossbeam 11, thus avoiding motion interference between the auxiliary rod 4 and the adjusting seat 61.

[0052] Reference Figure 3 , Figure 6 , Figure 8The fixed frame 3 includes a fixed rod 31, and the auxiliary block 5 is slidably mounted on the fixed rod 31. The auxiliary block 5 has an auxiliary shaft 51 arranged vertically, and an auxiliary sleeve 7 is rotatably sleeved on the outside of the auxiliary shaft 51. The auxiliary rod 4 is rotatably connected to the auxiliary sleeve 7. The axis of rotation between the auxiliary rod 4 and the auxiliary sleeve 7 is perpendicular to the auxiliary shaft 51, thereby realizing the mutual rotation between the two auxiliary rods 4. At the same time, the end of the auxiliary rod 4 near the adjusting seat 61 can move upward synchronously with the platform 1 to be installed, thereby completing the position adjustment operation of the platform 1 to be installed.

[0053] Reference Figure 8 , Figure 9 A gear 8 is rotatably mounted on the fixed rod 31. A rack 52 is arranged on the auxiliary block 5 along its sliding direction. The racks 52 of the two auxiliary blocks 5 are located on opposite sides of the gear 8 and mesh with it. When the pull rod 63 engages with the correction rod 62 and the platform 1 to be installed, the upward movement of the platform 1 will drive the auxiliary blocks 5 to shift and move away from each other. Simultaneously, it will drive the racks 52 to move synchronously. The racks 52 then drive the gear 8 to rotate. Through the meshing transmission between the gear 8 and the racks on both sides, the two auxiliary blocks 5 can move synchronously towards or away from each other, thus ensuring that the middle position of the two correction rods 62 corresponds to the middle position of the reference platform 2, ultimately guaranteeing the positioning accuracy of the lifting operation of the platform 1 to be installed.

[0054] Reference Figure 5 , Figure 6 , Figure 7 A slide rod 611 is slidably mounted on the adjusting seat 61. The sliding direction of the slide rod 611 is perpendicular to the rotation direction of the mounting sleeve 613, ensuring that the slide rod 611 can only make linear reciprocating motion along the set radial trajectory. The adjusting seat 61 is also provided with an elastic element 612 directly connected to the slide rod 611. The elastic element 612 is set as a spring. The extension and contraction direction of the elastic element 612 is consistent with the sliding direction of the slide rod 611, and can generate elastic deformation synchronously with the displacement of the slide rod 611. The correction rod 62 is connected to the slide rod 611 in an attitude perpendicular to the slide rod 611 and moves synchronously with the slide rod 611 relative to the adjusting seat 61.

[0055] When the correction rod 62 simultaneously forms surface contact with the longitudinal beam 12 and the transverse beam 11 corresponding to the platform 1 to be installed, the reaction forces of the longitudinal beam 12 and the transverse beam 11 will be transmitted to the slide rod 611 through the correction rod 62, pushing the slide rod 611 to move along its own sliding direction and compress the elastic element 612. At this time, the elastic element 612 is compressed and generates elastic potential energy, which provides the correction rod 62 with movable clearance space, so that the correction rod 62 can make adaptive fine adjustments relative to the adjusting seat 61 according to the actual assembly position of the longitudinal beam 12 and the transverse beam 11, adapt to the positional deviation during the assembly process, and avoid rigid interference that causes the component to jam. On the one hand, the elastic element 612 may deform, and on the other hand, the elastic element 612 continuously releases elastic restoring force through deformation. This force is transmitted to the correction rod 62 through the slide rod 611, maintaining a constant and sufficient abutment pressure between the correction rod 62 and the longitudinal beam 12 and the transverse beam 11. This ensures that the correction rod 62 fits tightly with the beam body and does not loosen. Finally, the position of the platform 1 to be assembled is constrained by this stable abutment force. At the same time, the elastic buffering characteristics of the elastic element 612 can also offset the instantaneous impact during the assembly process, protecting the longitudinal beam 12, the transverse beam 11 and the correction rod 62 and other mating components from damage, and improving the stability and assembly accuracy of the positioning correction.

[0056] Each correction rod 62 is provided with two corresponding slide rods 611. The correction rod 62 is rotatably connected to the slide rod 611, and the correction rod 62 rotates around its own center line, so that the correction rod 62 can rotate when moving relative to the crossbeam 11, thereby reducing the friction between the correction rod 62 and the crossbeam 11, so that the correction rod 62 can be positioned and adjusted for the platform 1 to be installed.

[0057] Reference Figure 3 , Figure 8 , Figure 9An adjusting handwheel 81 is rotatably mounted on the fixed frame 3. The rotating shaft of the adjusting handwheel 81 is coaxially fixedly connected to the transmission gear 8, ensuring that the adjusting handwheel 81 can drive the gear 8 to rotate synchronously when it rotates. After the platform to be installed 1 and the reference platform 2 have been adjusted and moved to the same set height and preliminarily aligned, the operator can rotate the adjusting handwheel 81. The rotational motion of the adjusting handwheel 81 is directly transmitted to the gear 8 through the coaxial shaft, causing the gear 8 to rotate stably around its own axis. The rotating gear 8 and the matching rack 52 form a meshing transmission engagement, driving the auxiliary block 5 connected to the rack 52 to move, forcing the auxiliary rod 4 to rotate a second time around its own hinge fulcrum. Since the correction rod 62 and the adjusting seat 61 are equipped with a sliding rod 611 to form a sliding guide engagement, the adjusting seat 61 can slide in a directional manner along the extension direction of the sliding rod 611. Under the action of the rotation of the auxiliary rod 4, the adjusting seat 61 will produce a corresponding second movement, and will compress the elastic element 612 assembled at the corresponding position of the adjusting seat 61 a second time. During this process, the straight-line distance between the hinge points at both ends of the auxiliary rod 4 is further shortened. Through the hinge transmission at the end of the auxiliary rod 4, a pulling force is applied to the platform to be installed 1 toward the reference platform 2, pulling the platform to be installed 1 toward the reference platform 2 with a small amplitude and high precision, completing the final micro-correction before the docking of the two platforms, eliminating the residual gap and positional deviation between them, and creating stable and precise assembly conditions for the subsequent fastening connection of the platform to be installed 1 and the reference platform 2.

[0058] Reference Figure 8 , Figure 10 The fixed rod 31 has multiple spaced limiting grooves 311 along the sliding stroke direction of the auxiliary block 5. The auxiliary block 5 is slidably fitted with a limiting block 9, and is equipped with an elastic element 91 that cooperates with the limiting block 9. The elastic element 91 is a spring. The elastic element 91 continuously applies a pushing force toward the limiting groove 311 to the limiting block 9, so that the limiting block 9 can be engaged and positioned with the limiting groove 311. The end face of the limiting block 9 away from the other side of the auxiliary block 5 is machined with a guide slope.

[0059] During the sliding process of the auxiliary block 5 along the fixed rod 31, the guide slope on the limiting block 9 will first contact the edge of the limiting groove 311. The guiding effect of the slope can convert the lateral constraint force of the fixed rod 31 into the radial displacement force of the elastic element 91, driving the limiting block 9 to retract into the auxiliary block 5 to avoid it, thereby ensuring that the auxiliary block 5 can smoothly complete the sliding operation. After the auxiliary block 5 moves to the target position and stops moving, the lateral constraint disappears, and the elastic element 91 pushes the limiting block 9 outward by its own elastic restoring force, and engages with the corresponding limiting groove 311 on the fixed rod 31, thereby locking the position of the auxiliary block 5 on the fixed rod 31.

[0060] The positioning and locking of the auxiliary block 5 allows the two auxiliary rods 4 to remain at the set deflection angle without changing, thereby ensuring that the correction rod 62 is continuously and stably in close contact with the longitudinal beam 12 on the platform to be installed, maintaining the corrected relative position between the two platforms without deviation, providing reliable positional assurance for the subsequent fastening connection operation between the reference platform 2 and the platform to be installed 1, and ensuring assembly accuracy and connection stability.

[0061] Reference Figure 10 A guide rod 92 is provided on the side of the limiting block 9 away from the limiting groove 311. The end of the guide rod 92 away from the limiting block 9 extends to the outside of the auxiliary block 5. After installation, the limiting block 9 can be separated from the limiting groove 311 by pulling the guide rod 92 to release the restriction on the auxiliary block 5. Then the position of the fixing frame 3 can be changed to assist in positioning the next platform 1 to be installed.

[0062] Reference Figure 8 The auxiliary sleeve 7 is provided with a sloping top 71 structure, and the auxiliary block 5 is fixedly provided with a baffle 72. The auxiliary rod 4 is limited to the space formed by the sloping top 71 and the baffle 72. When it abuts against the sloping top 71, it is in an inclined posture, and when it abuts against the baffle 72, it switches to a horizontal state. At this time, the platform to be installed 1 and the reference platform 2 are exactly on the same horizontal reference plane.

[0063] In the initial state, the end of the auxiliary rod 4 connected to the adjusting seat 61 hangs down naturally, and this end also forms an abutment with the inclined top 71, thereby keeping the auxiliary rod 4 in an inclined position. This arrangement can provide a suitable matching posture for the upward movement of the platform 1 to be installed, ensuring that the platform 1 to be installed can smoothly cooperate with the correction rod 62 and the pull rod 63 when it moves upward. After the platform 1 to be installed continues to move upward to the height position of the reference platform 2, the auxiliary rod 4 then forms an abutment limit with the baffle 72. With the constraint of the baffle 72, the auxiliary rod 4 remains horizontal, thereby stably restricting the platform 1 to be installed and the reference platform 2 to the same horizontal direction, realizing the horizontal alignment calibration of the two platforms.

[0064] The implementation principle of this invention is as follows: In the initial state, the auxiliary rod 4 and the inclined top 71 of the auxiliary sleeve 7 are in contact. After the winch 02 is started, it drives the platform 1 to be installed to move upward smoothly. When the platform 1 to be installed approaches the reference platform 2, the pull rod 63 first forms contact with the crossbeam 11 on the platform 1 to be installed. Then the installation sleeve 613 rotates relative to the auxiliary rod 4, causing the correction rod 62 to gradually fit and abut against the side of the crossbeam 11. After the correction rod 62 completes the abutment and positioning with the crossbeam 11, the locking block 631 abuts against the side of the crossbeam 11 away from the correction rod 62 under the elastic driving force of the elastic element 632. As the platform 1 continues to move upward, the auxiliary rod 4 will rotate relative to the auxiliary sleeve 7, and the distance between the platform 1 and the reference platform 2 will continue to decrease. During this process, the two auxiliary rods 4 will rotate autonomously around their cross-connection position, causing the two auxiliary blocks 5 to separate outward synchronously. The two correction rods 62 will also move away synchronously, so that the correction rods 62 will abut against the longitudinal beam 12 on the platform 1, so that the platform 1 and the reference platform 2 are in the same vertical plane, completing the initial positioning constraint in the direction of the longitudinal beam 12. After the installation platform 1 is moved to the same height as the reference platform 2, the adjustment handwheel 81 is rotated. Through the transmission cooperation of gear 8 and rack 52, the auxiliary block 5 is driven to move again, causing the two auxiliary rods 4 to rotate again around the intersection position. At the same time, the adjustment seat 61 moves closer to the longitudinal beam 12 and compresses the elastic element 612. The rotation of the auxiliary rods 4 will synchronously pull the installation platform 1 towards the reference platform 2, accurately correcting the horizontal installation position, effectively offsetting the positional deviation caused by the shaking of the installation platform 1, creating stable and accurate conditions for subsequent platform docking operations, and thus improving the overall construction efficiency and installation docking accuracy.

[0065] The present invention also discloses a bridge inverted construction method, which uses the above-mentioned bridge inverted construction platform.

[0066] A method for bridge inverted suspension construction includes the following steps:

[0067] S1, after the platform to be installed 1 is hoisted to the designated position and fixed to form the reference platform 2, the fixing frame 3 is placed on the reference platform 2 and the auxiliary rod 4 hangs down naturally;

[0068] S2, the winch 02 drives the loading platform 1 to move upward, the crossbeam 11 on the loading platform 1 abuts against the correction rod 62 and the tie rod 63, and at the same time the locking block 631 abuts against the side of the crossbeam 11 away from the correction rod 62.

[0069] S3, the platform 1 to be installed continues to move, the lower end of the auxiliary rod 4 moves up accordingly, and at the same time the two auxiliary rods 4 rotate, causing the two correction rods 62 to move away from each other until the correction rods 62 abut against the longitudinal beam 12 on the platform 1 to be installed.

[0070] S4. After the installation platform 1 and the reference platform 2 are moved to the same height, rotate the adjustment handwheel 81. The adjustment handwheel 81 drives the auxiliary rod 4 to rotate again. Through the pull rod 63 and the locking block 631, the installation platform 1 is moved closer to the reference platform 2 to achieve the final correction.

[0071] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A bridge inverted lifting construction method, based on a bridge inverted lifting construction platform, comprising a reference platform assembled from multiple platforms to be installed, each platform including a crossbeam and longitudinal beams located at both ends of the crossbeam, characterized in that, An auxiliary device is provided on the reference platform. The auxiliary device includes a fixed frame that is fixed on the reference platform and two cross-shaped auxiliary rods that are rotatably engaged at the intersection. Each auxiliary rod has an auxiliary block and an adjusting component movably connected to its two ends. The auxiliary block is slidably assembled on the fixed frame. In the initial state, one end of the auxiliary rod connected to the adjusting component is tilted downward. When the platform to be installed is hoisted and moved upward, the adjusting component engages with the crossbeam of the platform to be installed. The platform to be installed continues to move upward, driving the auxiliary rod to rotate and causing the two adjusting components to move synchronously in opposite directions. When the two adjusting components engage with the longitudinal beam, the platform to be installed and the reference platform are in the same vertical plane. The adjusting component includes an adjusting seat and a correction rod and a pull rod connected to the adjusting seat and perpendicular to each other. The correction rod abuts against the side of the crossbeam near the reference platform, and the pull rod abuts against the upper side of the crossbeam. A locking block is slidably mounted on the side of the pull rod near the crossbeam. An elastic element is provided at the connection between the locking block and the pull rod to connect the two. The elastic element is used to drive the locking block to move towards the crossbeam. When both the correction rod and the pull rod abut against the crossbeam, the locking block abuts against the side of the crossbeam away from the correction rod. The fixed frame includes a fixed rod, an auxiliary block is slidably mounted on the fixed rod, an auxiliary shaft is provided on the auxiliary block along the vertical direction, an auxiliary sleeve is rotatably sleeved on the outside of the auxiliary shaft, the auxiliary rod is rotatably connected to the auxiliary sleeve, an installation sleeve is rotatably provided on the adjusting seat, and the end of the auxiliary rod away from the auxiliary sleeve is rotatably connected to the installation sleeve. A gear is rotatably mounted on the fixed rod, and a rack is mounted on the auxiliary block along its sliding direction. The racks on the two auxiliary blocks are located on both sides of the gear and mesh with the gear. A slide rod is slidably mounted on the adjusting seat. The slide rod slides in a direction perpendicular to the rotation axis of the mounting sleeve. An elastic element II connected to the slide rod is mounted on the adjusting seat. A correction rod is perpendicular to the slide rod and connected to the slide rod. An adjusting handwheel is rotatably mounted on the fixed frame, and the shaft of the adjusting handwheel is coaxially connected to the gear. The bridge inverted suspension construction method includes: S1, After the platform to be installed is hoisted to the designated position and fixed to form a reference platform, the fixing frame is placed on the reference platform and the auxiliary rod hangs down naturally; S2, the winch drives the new loading platform to move up. As the loading platform moves up, the crossbeam on the loading platform abuts against the correction rod and the tie rod, while the locking block abuts against the side of the crossbeam away from the correction rod. S3, the platform to be installed continues to move, and the lower end of the auxiliary rod moves up accordingly. At the same time, the two auxiliary rods rotate, causing the two correction rods to move away from each other until the correction rods abut against the longitudinal beam on the platform to be installed. S4. After the platform to be installed and the reference platform are moved to the same height, rotate the adjusting handwheel. The adjusting handwheel will drive the auxiliary rod to rotate again, and through the pull rod and the locking block, it will drive the platform to be installed closer to the reference platform to achieve the final correction.

2. The bridge inverted suspension construction method according to claim 1, characterized in that, Multiple limiting grooves are provided on the fixed rod along the sliding direction of the auxiliary block. A limiting block and an elastic element three that cooperate with the limiting block are slidably assembled on the auxiliary block. The elastic element three is used to drive the limiting block to engage with the limiting groove. A guide slope is provided on the side of the limiting block away from the other auxiliary block.

3. The bridge inverted suspension construction method according to claim 2, characterized in that, A guide rod is provided on the side of the limiting block away from the limiting groove, and the end of the guide rod away from the limiting block extends to the outside of the auxiliary block.

4. The bridge inverted suspension construction method according to claim 1, characterized in that, The auxiliary sleeve is equipped with an inclined top, the auxiliary block is equipped with a baffle, and the auxiliary rod is located between the inclined top and the baffle. When the auxiliary rod abuts against the inclined top, it is in an inclined state. When it abuts against the baffle, the auxiliary rod is in a horizontal state and the platform to be installed and the reference platform are on the same horizontal plane.

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