Translation erection method for space-limited box girder under ultra-high voltage line

Abstract

The invention provides a space-limited box girder translation erection method under an ultra-high voltage line, and belongs to the technical field of box girder erection, a guide rail, a walking base, a direction fine adjustment mechanism and a translation support are included, and the method specifically comprises the steps that S1, the guide rail is fixedly arranged on the inner side of a built cover beam and extends to the outer side of a high voltage line influence area; s2, installing a translation facility outside the influence area; s3, the box girder is temporarily hoisted to a girder seat cushion block at the top of the translation support through a crane, the two ends of the box girder are firmly bound and fixed through high-strength binding bands, and it is guaranteed that the box girder does not incline or deviate in the hoisting process; s4, insulating plates are mounted above the box girder at certain intervals; s5, a walking base and a direction fine adjustment mechanism are started to ensure that the box girder is accurately in butt joint with the designed position of the built bent cap; and S6, a lifting air cylinder is started to gradually move the box girder downwards to the designed position, and installation is completed. According to the invention, efficient and safe erection operation of the box girder can be realized in a high-voltage line height limited area.

Description

Technical Field

[0001] The present invention relates to the technical field of box girder erection, and in particular to a method for erecting a box girder in translation under a limited space under an ultra-high voltage line. Background Art

[0002] With the advancement of urbanization, bridge construction plays an increasingly important role in highway and urban transportation networks. However, in some special environments, especially in the construction of urban bridges and highway bridges, bridge erection is often affected by ultra-high voltage lines and other restrictive factors. Ultra-high voltage lines (especially high-voltage wires of 110kV and above) not only generate strong electromagnetic fields for the surrounding environment, but also have high height restrictions, making it difficult for conventional bridge erection processes to operate smoothly in such environments.

[0003] Traditional beam erection technology usually relies on large cranes or bridge erection machines to hoist and erect beams. These devices usually require sufficient operating space and height, but the height restrictions and tight operating space brought by ultra-high voltage lines seriously affect the operation of beam erection equipment and the safe hoisting of beams. Especially in the high-voltage line hanging area, the safe distance between the operating equipment and the high-voltage line cannot meet the construction requirements, which is prone to safety hazards.

[0004] At present, conventional beam erection technology has not proposed an effective solution to this problem. Especially in complex urban environments, due to limited space and obstacles of high-voltage lines, the bridge erection process is often forced to be interrupted or carried out in a slower and more risky manner. Therefore, a new box girder erection method is urgently needed to ensure efficient and safe erection of box girders in highly restricted areas. Summary of the invention

[0005] The object of the present invention is to provide a method for translating and erecting a box girder in a space-constrained area under an ultra-high voltage line, which can realize efficient and safe erection of the box girder in an area with limited height of the high voltage line.

[0006] In the first aspect, the embodiments of the present invention are implemented by the following technical solutions: A method for translating and erecting a box girder with limited space under an ultra-high voltage line comprises a guide rail, a walking base, a direction fine-tuning mechanism and a translation bracket, and the specific steps include: S1. The guide rail is fixedly arranged inside the built cap beam and extended to the outside of the high-voltage line influence area. The length direction of the cap beam and the length direction of the guide rail must be arranged in the same direction; S2. Install translation facilities outside the affected area: install the walking base on the guide rail, and fix the direction fine-tuning mechanism on the walking base. Install the valley bottom of the translation bracket on the direction fine-tuning mechanism, and fix the beam seat pad on the top of the translation bracket. The beam seat pad needs to be higher than the top position of the built cap beam; S3. Use a crane to temporarily hoist the box girder onto the beam seat pad on the top of the translation support, and securely tie both ends of the box girder with high-strength straps to ensure that the box girder does not tilt or deflect during the hoisting process; S4. Install the insulation board on the top of the box beam at a certain interval. The height of the insulation board must be lower than the height of the high-voltage line. S5. Start the walking base and slowly move the box girder to the appropriate position of the built cap girder under the high-voltage line. Fine-tune the direction of the box girder on the horizontal plane through the direction fine-tuning mechanism, and accurately adjust the lateral position of the box girder as needed to ensure that the box girder accurately docks with the designed position of the built cap girder. S6. Start the lifting cylinder to drive the translation bracket to move vertically downward as a whole, and gradually move the box girder downward to the designed position until the box girder is in firm contact with the built cap beam and the installation is completed.

[0007] Furthermore, a pair of translation brackets are provided, and are respectively close to the positions of the built cap beams on both sides. The pair of translation brackets are fixedly connected by a connecting frame. A pair of guide rails are correspondingly provided at the bottom of each translation bracket. The pair of guide rails are arranged in parallel. A limiting groove is provided on the top of each guide rail along its length direction. A rack is fixedly provided in the limiting groove along the length direction. The walking base includes a walking wheel and a walking motor, wherein an annular tooth is provided on the outer peripheral surface of the walking wheel, and the annular tooth is meshed with the rack. A part of the walking wheel is rotatably embedded in the limiting groove, and the walking motor is used to drive the walking wheel to rotate.

[0008] Furthermore, a top plate is provided on the top of the walking base, and a bottom plate is fixedly provided on the bottom of the translation bracket, the direction fine-tuning mechanism comprises a top ring, a bottom ring, a rotating motor, a support, a gear, a movable motor and a gear rod, the top ring is fixedly provided at the bottom of the base plate, the bottom ring is fixedly provided at the top of the top plate, the top ring and the bottom ring are coaxial and abutted against each other, the top ring can slide on the top wall of the bottom ring, the rotating motor and the bottom ring are coaxially provided, the rotating motor is fixedly provided on the top plate and its output shaft vertically passes through the top plate, the output shaft of the rotating motor is fixedly connected to the support, the gear is rotatably provided on the support, the movable motor is fixedly provided on the support and is used to drive the gear to rotate, the gear rod is fixedly provided on the bottom wall of the base plate, and limited position edges are integrally provided on both sides of the gear rod along the length direction, the gear and the gear rod are meshed with each other, and at the same time, both sides of the gear and the limited position edges are abutted against each other.

[0009] Furthermore, a convex ring is protruding from the inner peripheral wall of the bottom ring, and a movement gap is provided between the outer peripheral wall of the convex ring and the inner wall of the top ring.

[0010] Furthermore, the top wall of the convex ring and the bottom wall of the bottom plate are in sliding fit, and a capsule is provided in the moving gap between the convex ring and the top ring, and the capsule is filled with air medium.

[0011] Furthermore, a plurality of telescopic rods are arranged between the bottom plate and the top plate, the telescopic rods are located at the four corners of the top plate, and two ends of the telescopic rods are respectively spherically jointed on the bottom plate and the top plate.

[0012] Furthermore, a support plate is fixedly provided on one side of a pair of the translation brackets away from the moving direction of the translation brackets, a flip support rod is rotatably provided on the support plate, one end of the flip support rod away from the support plate is fixedly connected to the insulating plate, and a swing motor is provided on the support plate, and the swing motor is used to drive the flip support rod to swing so that the insulating plate swings along the rotating shaft of the swing motor to be directly above the box beam.

[0013] Furthermore, the lifting cylinder is arranged between the walking base and the top plate.

[0014] Furthermore, a groove extending along the length direction of the built cap beam is pre-excavated at the position where the guide rail is installed on the ground, and a steel cage and a U-shaped screw are placed in the groove. Concrete is poured in the groove, and the steel cage and the U-shaped screw are located in the concrete. A steel plate is embedded on the top of the concrete, and a plurality of steel plates are arranged at intervals along the length direction of the groove. The guide rail is placed on the steel plate, and both ends of the U-shaped screw pass through the steel plate and extend out of the concrete. Clips are provided on the sliding sleeves at both ends of the U-shaped screw, and the two clips are used to clamp the lower edge of the guide rail at the same time. The threaded sections at both ends of the U-shaped screw are threadedly sleeved with locking nuts, and the locking nuts abut against the clips.

[0015] Furthermore, a convex outer edge is provided on the beam seat pad, and the convex outer edge abuts against the outer side wall of the box beam.

[0016] The technical solution of the embodiment of the present invention has at least the following advantages and beneficial effects: 1. The present invention can effectively solve the technical problem of realizing efficient and safe erection of box girders in areas with restricted high-voltage line heights by rationally designing guide rails, a walking base, a direction fine-tuning mechanism, and a translation bracket, and optimizing specific construction steps. Specifically, by arranging the guide rails on the inner side of the built cap beam and extending the guide rails to the outside of the area affected by the high-voltage line, the interference of the high-voltage line on the erection process is successfully avoided; the horizontal direction and lateral position of the box beam are precisely adjusted by the direction fine-tuning mechanism to ensure the precise docking of the box beam with the designed position of the built cap beam; during the construction process, insulating plates are installed to provide effective electric shock protection measures, and combined with the high-strength binding fixation during the lifting process, the safety of the operation is significantly improved; in addition, the combined design of the walking base and the translation bracket enables the box beam to be smoothly and stably translated from the outside of the area affected by the high-voltage line to the target position, which greatly improves the construction efficiency and ensures the safety and accuracy of the box beam erection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A structural schematic diagram of the guide rail arrangement of the method for translating and erecting a box girder with limited space under an ultra-high voltage line provided by the present invention; Figure 2 The present invention is intended to show a side view of a box girder mounted on a translation support; Figure 3 The present invention is intended to show the front view of the moving process of the box girder translation erection; Figure 4 The present invention aims to show a top view after erecting several box beams; Figure 5 This is a schematic diagram of the structure of the direction fine-tuning mechanism of the present invention; Figure 6 The present invention is intended to show an exploded view of the top ring and the bottom ring; Figure 7 The present invention is intended to show the installation schematic diagram of the guide rail; Figure 8 The present invention is intended to show the structural schematic diagram of the beam seat pad; Icons: 1-guide rail, 11-limiting groove, 111-rack, 2-walking base, 21-lifting cylinder, 22-walking wheel, 23-walking motor, 24-top plate, 3-direction fine-tuning mechanism, 31-top ring, 32-bottom ring, 321-convex ring, 3211-capsule, 3212-air medium, 33-rotating motor, 34-support, 35-gear, 36-moving motor, 37-gear rod, 371-limiting edge, 4-translational bracket, 41-connecting frame, 42-bottom plate, 43-support plate, 431-flip support rod, 432-swing motor, 5-beam seat pad, 51-convex outer edge, 6-insulating board, 7-telescopic rod, 8-groove, 81-rebar cage, 82-U-shaped screw, 83-steel plate, 84-clamp, 85-locking nut, 9-built cap beam, 91-outside of the affected area. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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. Example

[0021] The following is further described in conjunction with specific embodiments. Figure 1-Figure 8 As shown, the present invention is a method for translating and erecting a box girder with limited space under an ultra-high voltage line, comprising a guide rail 1, a walking base 2, a direction fine-tuning mechanism 3 and a translation bracket 4, and the specific steps include: S1. The guide rail 1 is fixedly arranged inside the built cap beam 9 and extended to the outside 91 of the high-voltage line influence area. The length direction of the cap beam should be consistent with the length direction of the guide rail 1. S2. Install translation facilities outside the affected area: install the walking base 2 on the guide rail 1, and at the same time, fix the direction fine-tuning mechanism 3 on the walking base 2, install the translation bracket 4 on the direction fine-tuning mechanism 3, and fix the beam seat pad 5 on the top of the translation bracket 4. The beam seat pad 5 needs to be higher than the top position of the built cap beam 9; S3, using a crane to temporarily hoist the box beam onto the beam seat pad 5 on the top of the translation bracket 4, and firmly tie and fix the two ends of the box beam with high-strength straps to ensure that the box beam does not tilt or deflect during the hoisting process; S4, installing the insulating plates 6 above the box beam at a certain interval, and the height of the insulating plates 6 must be lower than the height of the high-voltage line; S5, start the walking base 2, slowly translate the box girder to the appropriate position of the built cap beam 9 under the high-voltage line, fine-tune the direction of the box girder on the horizontal plane through the direction fine-tuning mechanism 3, and accurately adjust the lateral position of the box girder as needed to ensure that the box girder accurately docks with the designed position of the built cap beam 9; S6. Start the lifting cylinder 21 to drive the translation support 4 to move vertically downward as a whole, and gradually move the box beam downward to the designed position until the box beam is in firm contact with the built cap beam 9, and the installation is completed.

[0022] Reference Figure 2 and Figure 3 As shown, a pair of translation brackets 4 are provided, and are respectively close to the positions of the built cap beams 9 on both sides. In order to ensure the stability between the translation brackets 4, the pair of translation brackets 4 are fixedly connected by a connecting frame 41. A pair of guide rails 1 are correspondingly provided at the bottom of each translation bracket 4. The function of this guide rail 1 system is to ensure the stability and accuracy of the translation bracket 4 on each side during the movement process. The pair of guide rails 1 are arranged in parallel to ensure that the translation bracket 4 can move smoothly along the fixed track direction.

[0023] A limit groove 11 is provided at the top of each guide rail 1 along its length direction, and a rack 111 is fixedly arranged in the limit groove 11 along its length direction. The function of the rack 111 is to mesh with the annular teeth of the walking wheel 22, so as to ensure that the walking base 2 can accurately and stably move along the guide rail 1 during the travel process. In order to improve the bearing capacity and wear resistance of the guide rail 1 system, the material of the rack 111 is selected from high-strength alloy steel or wear-resistant alloy material to ensure that a good meshing effect can be maintained after long-term use.

[0024] The walking base 2 includes a base frame, walking wheels 22 and a walking motor 23. The walking wheels 22 are rotatably mounted on the base frame in multiple rows, and each row of walking wheels 22 is connected to the base frame through bearings to ensure stability and low friction during walking. Annular teeth are provided on the outer circumference of the walking wheel 22, and these annular teeth are meshed with the rack 111 to form a stable transmission system. A part of the walking wheel 22 is designed to be rotatably embedded in the limit groove 11, so as to prevent the lateral deviation of the walking wheel 22 during the travel process, further improving the stability and accuracy of the system.

[0025] The travel motor 23 is fixedly mounted on the base frame and drives the travel wheel 22 to rotate through the transmission system. The power of the travel motor 23 is selected according to actual needs to ensure that the travel wheel 22 can provide sufficient traction during operation. The driving method of the motor enables the travel wheel 22 to move smoothly and accurately along the rack 111, ensuring the travel distance accuracy of the translation bracket 4 and avoiding position deviation caused by poor mechanical transmission.

[0026] The precise fit between the rack 111 and the annular teeth of the running wheel 22 can ensure the stability of the running wheel 22 during travel, thereby preventing the running wheel 22 from slipping or getting stuck due to excessive clearance or poor meshing between the rack 111 and the annular teeth. In addition, since the outer peripheral surface of the running wheel 22 is provided with annular teeth, its structure can effectively reduce wear during travel under load, thereby increasing the service life of the running system.

[0027] Reference Figure 3 and Figure 4 As shown, in order to accurately place the box girder, a top plate 24 is welded to the top of the walking base 2, and a bottom plate 42 is welded to the bottom of the translation bracket 4. The direction fine-tuning mechanism 3 includes a top ring 31, a bottom ring 32, a rotating motor 33, a support 34, a gear 35, a moving motor 36 and a gear rod 37. The top ring 31 is welded to the bottom of the bottom plate 42, and the bottom ring 32 is welded to the top of the top plate 24. The top ring 31 and the bottom ring 32 are coaxial and abut each other. The top ring 31 can slide on the top wall of the bottom ring 32. Through this design, the top ring 31 can be fine-tuned in the bottom ring 32, thereby adjusting the angle and position of the translation bracket 4 to ensure the precise positioning of the translation bracket 4 during operation.

[0028] The rotating motor 33 is coaxially arranged with the bottom ring 32. The rotating motor 33 is fixedly arranged on the top plate 24 and its output shaft passes through the top plate 24 in the vertical direction. The output shaft of the rotating motor 33 is fixedly connected with the support 34. The gear 35 is rotatably arranged on the support 34. The moving motor 36 is fixedly arranged on the support 34 and is used to drive the gear 35 to rotate. The gear rod 37 is fixedly arranged on the bottom wall of the bottom plate 42. The two sides of the gear rod 37 are integrally provided with limiting edges 371 along the length direction. The gear 35 is meshed with the gear rod 37. At the same time, the two sides of the gear 35 are arranged to abut against the limiting edges 371. Due to the existence of the limiting edges 371, it can be ensured that in the process of the rotating motor 33 driving the gear 35 to rotate in the vertical direction, the gear rod 37 and the top plate 24 are synchronously driven to rotate in the vertical direction.

[0029] It should be noted that the rotating motor 33 and the moving motor 36 in the direction fine-tuning mechanism 3 need to be driven synchronously to ensure that the translation brackets 4 on both sides can rotate or translate synchronously. This design ensures that the translation bracket 4 will not produce uneven torque distribution during the fine-tuning process, thereby ensuring the stability and accuracy of the translation bracket 4. In practical applications, the driving control system of the rotating motor 33 and the moving motor 36 can achieve synchronous operation through sensors and controllers, avoiding mechanical damage or position deviation caused by asynchronous movement; Since there is no bolt or other connection structure between the top ring 31 and the bottom ring 32, the relative sliding between the top ring 31 and the bottom ring 32 can realize the precise adjustment of multiple angles and displacements of the translation bracket 4 and the walking base 2 in the horizontal plane, and there is no complicated fixing component. Therefore, the upper translation bracket 4 and the lower walking base 2 can be disassembled and assembled very conveniently. This design not only simplifies the structure, but also effectively improves the convenience of transportation and installation. Especially when it is necessary to transport or replace parts, the disassembly process is very fast, saving a lot of time and labor costs.

[0030] Reference Figure 5 and Figure 6 As shown, in the direction fine-tuning mechanism 3, the inner peripheral wall of the bottom ring 32 is integrally protruded with a convex ring 321. There is a certain movement gap between the outer peripheral wall of the convex ring 321 and the inner wall of the top ring 31. This design plays a role of limiting, preventing the translation bracket 4 from separating from the bottom ring 32 during operation, and stabilizing the entire bracket.

[0031] Specifically, the top wall of the convex ring 321 is in sliding fit with the bottom wall of the bottom plate 42. The top wall of the convex ring 321 and the bottom wall of the bottom plate 42 form a supporting effect through sliding contact, thereby ensuring a stable connection between the top ring 31 and the bottom ring 32. During the fine adjustment of the translation bracket 4, the relative movement between the convex ring 321 and the top ring 31 can be effectively controlled in this design, and unnecessary displacement is prevented by the limiting gap, further enhancing the stability of the system.

[0032] In order to improve the stability and buffering capacity of the structure, a capsule 3211 is provided in the moving gap between the convex ring 321 and the top ring 31. The capsule 3211 is filled with air medium 3212, which can provide a certain buffering effect for the relative movement between the convex ring 321 and the top ring 31. When the relative position between the convex ring 321 and the top ring 31 moves, the capsule 3211 will be compressed and deformed in the moving gap, thereby alleviating the impact force generated by the movement and effectively reducing the vibration and instability factors inside the system.

[0033] The compression deformation of the capsule 3211 can improve the stability of the system during the adjustment process, and avoid affecting the working accuracy of the translation bracket 4 due to excessive relative displacement or excessive vibration. In addition, the buffering effect of the air medium 3212 can also reduce mechanical wear, extend the service life of the system, and further improve the reliability and durability of the overall frame.

[0034] Reference Figure 3 and Figure 5 As shown, in this embodiment, a plurality of telescopic rods 7 are arranged between the bottom plate 42 and the top plate 24, and each group of telescopic rods 7 is located at the four corners of the top plate 24. In different implementations, the number of telescopic rods 7 can be installed according to needs. Both ends of each telescopic rod 7 are installed through a ball joint, one end of the ball joint is fixed to the bottom plate 42, and the other end is fixed to the top plate 24. The telescopic rod 7 has an adjustable length, and the top plate 24 can be raised or lowered or adjusted according to actual needs, thereby providing stable support and supporting force in different working conditions.

[0035] Through the ball joint connection, the telescopic rod 7 can freely adjust the angle during the installation process, ensuring that no matter how the top plate 24 is raised or lowered, the telescopic rod 7 can always maintain a stable mechanical state, avoiding structural instability due to excessive torque. At the same time, the setting of the telescopic rod 7 increases the rigidity of the entire structural system, effectively improving the stability and bearing capacity between the top plate 24 and the bottom plate 42, and avoiding uneven settlement or tilting of the top plate 24 due to external forces.

[0036] The telescopic rod 7 is made of high-strength alloy material, which has good corrosion resistance and wear resistance, ensuring high stability and safety during long-term use. This design not only simplifies the installation and disassembly process, but also effectively enhances the overall safety of the system, especially when dealing with large loads or strong vibrations, it can provide effective support and ensure the stability of the structure.

[0037] In addition, the adjustment function of the telescopic rod 7 also enables the structure to be flexibly adjusted according to different working environments or load requirements, greatly improving its adaptability and service life.

[0038] Reference Figure 2 and Figure 3 As shown, in this embodiment, a support plate 43 is welded on one side of a pair of translation brackets 4 away from the moving direction of the translation bracket 4, and a flip support rod 431 is rotatably provided on the support plate 43. One end of the flip support rod 431 away from the support plate 43 is fixedly connected to the insulating plate 6, and a swing motor 432 is also provided on the support plate 43. The swing motor 432 is used to drive the flip support rod 431 to swing, so that the insulating plate 6 swings along the rotation axis of the swing motor 432 to the top of the box beam.

[0039] Specifically, the swing motor 432 on the support plate 43 is connected to the flip support rod 431 through a transmission mechanism. When the swing motor 432 is working, it drives the flip support rod 431 to rotate, thereby driving the insulating plate 6 to swing horizontally or vertically. In this way, the insulating plate 6 can be accurately adjusted to the position directly above the box beam for lifting operations. The rotating shaft of the swing motor 432 is adjustable, thereby providing an adjustment range of different angles, ensuring that the insulating plate 6 can be flexibly adjusted according to actual lifting requirements.

[0040] It is worth noting that the insulating plate 6 is usually located on the side away from the moving direction of the translation support 4 before the swing motor 432 is driven. The main purpose of this position setting is to facilitate the crane to temporarily lift the box beam to the beam seat pad 5 on the top of the translation support 4. Due to the setting of the position of the insulating plate 6, the insulating plate 6 will not interfere with the lifting operation, avoiding the situation of hindering the operation of the crane. Therefore, the crane can smoothly lift the box beam to the predetermined position.

[0041] Furthermore, by driving the insulating plate 6 to swing by the swing motor 432, the position adjustment of the insulating plate 6 during the box girder hoisting process can be flexibly achieved. Regardless of how the box girder hoisting angle changes, the position of the insulating plate 6 can be accurately adjusted to adapt to different hoisting environments and operation requirements.

[0042] In addition, the connection between the flip support rod 431 and the support plate 43 uses a high-strength connector to ensure that the flip support rod 431 is stable and correct during the swing process, while preventing loosening or damage caused by external forces. The swing motor 432 uses a motor with moderate power to ensure that it can stably drive the flip support rod 431 to work, and has an overload protection function to ensure long-term and efficient operation.

[0043] The advantages of this design are its high efficiency and flexibility, which can effectively avoid interference problems that may occur during the lifting process and improve the efficiency and safety of the lifting operation. Through the rationally designed structure and precise adjustment mechanism, the lifting operation is ensured to proceed smoothly and the reliability and ease of operation of the entire system are improved.

[0044] Reference Figure 2 and Figure 3 As shown, the lifting cylinder 21 is installed between the walking base 2 and the top plate 24, so that the entire lifting cylinder 21 is closer to the ground and closer to the bottom relative to the entire translation bracket 4, thereby lowering the center of gravity, making the translation bracket 4 have higher stability during the lifting process. This installation form can also effectively reduce the deformation or instability of the equipment structure that may be caused by external force or uneven force during the lifting process, thereby improving the accuracy and safety of the box girder erection.

[0045] Reference Figure 7As shown, a groove 8 extending along the length direction of the built cap beam 9 is pre-excavated at the position where the guide rail 1 is installed on the ground, a steel cage 81 and a U-shaped screw 82 are placed in the groove 8, and concrete is poured in the groove 8. The steel cage 81 and the U-shaped screw 82 are located in the concrete, and a steel plate 83 is embedded on the top of the concrete. A plurality of steel plates 83 are arranged at intervals along the length direction of the groove 8, and the guide rail 1 is placed on the steel plate 83. Both ends of the U-shaped screw 82 pass through the steel plate 83 and extend out of the concrete. Both ends of the U-shaped screw 82 are slidingly sleeved with clamps 84. The two clamps 84 are used to simultaneously clamp the lower edge positions of the recessed parts on both sides of the guide rail 1, and the threaded sections at both ends of the U-shaped screw 82 are threadedly sleeved with locking nuts 85, which abut against the clamps 84.

[0046] Reference Figure 3 and Figure 8 As shown, a convex outer edge 51 is integrally provided on the beam seat pad 5, and the convex outer edge 51 abuts against the outer side wall of the box beam. The design of the convex outer edge 51 can provide additional support and positioning when the box beam is stably placed on the beam seat pad 5. The convex outer edge 51 abuts against the outer side wall of the box beam, which effectively prevents the box beam from lateral movement or tilting due to external force or vibration during the process of hoisting, translation and lifting. In particular, when the box beam is translated from the outer side 91 of the high-voltage line influence area to the target position, the abutment of the convex outer edge 51 further enhances the stability of the box beam, so that it can always maintain a predetermined stress state, avoiding the adverse effects of the box beam on the construction accuracy and safety caused by the deviation of the box beam.

[0047] In addition, the structural optimization of the convex outer edge 51 has a significant protective effect on the box beam. During the translation process, the convex outer edge 51 forms a flexible contact with the outer side wall of the box beam, which can not only stabilize the box beam, but also reduce the damage to the box beam structure that may be caused by hard impact, thereby extending the service life of the box beam and improving the construction quality.

[0048] By providing a convex outer edge 51 on the beam seat pad 5, the present invention further improves the safety and accuracy of box girder erection, and provides more reliable technical support for achieving efficient and safe box girder erection in a complex construction environment where the height of the high-voltage line is limited.

[0049] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for translating and erecting a box girder with limited space under an ultra-high voltage line, comprising a guide rail (1), a walking base (2), a direction fine-tuning mechanism (3) and a translation bracket (4), characterized in that: The specific steps include: S1. The guide rail (1) is fixedly arranged on the inner side of the built cap beam (9) and extended to the outer side of the high-voltage line influence area (91). The length direction of the cap beam and the length direction of the guide rail (1) must be arranged in the same manner; S2. Install the translation facility outside the affected area: install the walking base (2) on the guide rail (1), and at the same time, fix the direction fine-tuning mechanism (3) on the walking base (2), install the translation bracket (4) on the direction fine-tuning mechanism (3), and fix the beam seat pad (5) on the top of the translation bracket (4). The beam seat pad (5) needs to be higher than the top position of the built cap beam (9); S3, using a crane to temporarily hoist the box beam onto the beam seat pad (5) on the top of the translation support (4), and firmly tie and fix the two ends of the box beam with high-strength straps to ensure that the box beam does not tilt or deflect during the hoisting process; S4, installing the insulating plates (6) above the box beam at a certain interval, and the height of the insulating plates (6) must be lower than the height of the high-voltage line; S5, start the walking base (2), slowly translate the box girder to the appropriate position of the built cap beam (9) below the high-voltage line, fine-tune the direction of the box girder on the horizontal plane through the direction fine-tuning mechanism (3), and accurately adjust the lateral position of the box girder as needed to ensure that the box girder accurately docks with the designed position of the built cap beam (9); S6. Start the lifting cylinder (21) to drive the translation support (4) to move vertically downward as a whole, and gradually move the box beam downward to the designed position until the box beam is in firm contact with the built cap beam (9), and the installation is completed.

2. The method for erecting a box girder with limited space under an ultra-high voltage line according to claim 1, characterized in that: A pair of translation brackets (4) are provided, and are respectively close to the positions of the built cap beams (9) on both sides. The pair of translation brackets (4) are fixedly connected by a connecting frame (41). A pair of guide rails (1) are correspondingly provided at the bottom of each translation bracket (4). The pair of guide rails (1) are arranged in parallel. A limiting groove (11) is provided at the top of each guide rail (1) along its length direction. A rack (111) is fixedly provided in the limiting groove (11) along the length direction. The walking base (2) includes a walking wheel (22) and a walking motor (23), wherein an annular tooth is provided on the outer peripheral surface of the walking wheel (22), and the annular tooth is meshed with the rack (111). A part of the walking wheel (22) is rotatably embedded in the limiting groove (11), and the walking motor (23) is used to drive the walking wheel (22) to rotate.

3. The method for erecting a box girder in a limited space under an ultra-high voltage line according to claim 2, characterized in that: A top plate (24) is arranged on the top of the walking base (2), a bottom plate (42) is fixedly arranged on the bottom of the translation bracket (4), the direction fine-tuning mechanism (3) comprises a top ring (31), a bottom ring (32), a rotating motor (33), a support (34), a gear (35), a moving motor (36) and a gear rod (37), the top ring (31) is fixedly arranged on the bottom of the bottom plate (42), the bottom ring (32) is fixedly arranged on the top of the top plate (24), the top ring (31) and the bottom ring (32) are coaxial and mutually abutting, the top ring (31) can slide on the top wall of the bottom ring (32), the rotating motor (33) and the bottom ring (32) are coaxially arranged, The rotating motor (33) is fixedly arranged on the top plate (24) and its output shaft vertically passes through the top plate (24); the output shaft of the rotating motor (33) is fixedly connected to the support (34); the gear (35) is rotatably arranged on the support (34); the moving motor (36) is fixedly arranged on the support (34) and is used to drive the gear (35) to rotate; the gear rod (37) is fixedly arranged on the bottom wall of the bottom plate (42); both sides of the gear rod (37) are integrally provided with limiting edges (371) along the length direction; the gear (35) and the gear rod (37) are meshed with each other, and at the same time, both sides of the gear (35) are arranged to abut against the limiting edges (371).

4. The method for erecting a box girder in a limited space under an ultra-high voltage line according to claim 3, characterized in that: A convex ring (321) is protruding from the inner peripheral wall of the bottom ring (32), and a movable gap is provided between the outer peripheral wall of the convex ring (321) and the inner wall of the top ring (31).

5. The method for erecting a box girder in a limited space under an ultra-high voltage line according to claim 4, characterized in that: The top wall of the convex ring (321) and the bottom wall of the bottom plate (42) are in sliding fit, and a capsule (3211) is provided in the moving gap between the convex ring (321) and the top ring (31), and the capsule (3211) is filled with air medium (3212).

6. The method for erecting a box girder in a limited space under an ultra-high voltage line according to claim 5, characterized in that: A plurality of groups of telescopic rods (7) are arranged between the bottom plate (42) and the top plate (24); the telescopic rods (7) are located at the four corners of the top plate (24); and two ends of the telescopic rods (7) are respectively spherically jointed on the bottom plate (42) and the top plate (24).

7. The method for erecting a box girder in a limited space under an ultra-high voltage line according to claim 2, characterized in that: A support plate (43) is fixedly provided on one side of a pair of translation supports (4) away from the moving direction of the translation supports (4), a flip support rod (431) is rotatably provided on the support plate (43), one end of the flip support rod (431) away from the support plate (43) is fixedly connected to the insulating plate (6), and a swing motor (432) is provided on the support plate (43), and the swing motor (432) is used to drive the flip support rod (431) to swing, so that the insulating plate (6) swings along the rotation axis of the swing motor (432) to the top of the box beam.

8. The method for erecting a box girder in a limited space under an ultra-high voltage line according to claim 3, characterized in that: The lifting cylinder (21) is arranged between the walking base (2) and the top plate (24).

9. The method for erecting a box girder in a limited space under an ultra-high voltage line according to claim 1, characterized in that: A groove (8) extending along the length direction of the built cap beam (9) is pre-excavated at the position where the guide rail (1) is installed on the ground, a steel cage (81) and a U-shaped screw (82) are placed in the groove (8), concrete is poured in the groove (8), the steel cage (81) and the U-shaped screw (82) are located in the concrete, a steel plate (83) is embedded on the top of the concrete, and a plurality of steel plates (83) are arranged at intervals along the length direction of the groove (8). The rail (1) is placed on a steel plate (83), and the two ends of the U-shaped screw (82) pass through the steel plate (83) and extend out of the concrete. The two ends of the U-shaped screw (82) are slidably sleeved with clamps (84), and the two clamps (84) are used to clamp the lower edge of the guide rail (1) at the same time. The threaded sections at the two ends of the U-shaped screw (82) are threadedly sleeved with locking nuts (85), and the locking nuts (85) abut against the clamps (84).

10. The method for erecting a box girder in a limited space under an ultra-high voltage line according to claim 1, characterized in that: The beam seat cushion block (5) is provided with a convex outer edge (51), and the convex outer edge (51) abuts against the outer side wall of the box beam.

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