Bridge erection assembly type visual limiting system

Abstract

The invention discloses a bridge erection assembly type visual limiting system which comprises a limiting structure, a counter-force bearing structure, a stress displacement monitoring module and a connecting structure used for being matched with the lower portion of a bridge body, and the counter-force bearing structure is arranged on the outer side of the limiting structure. The top of the counter-force bearing structure is a bearing end used for being matched with the lower portion of a cantilever of a bridge body, the connecting structure is arranged at the top of the limiting structure, the inner side of the limiting structure is used for being matched with the outer side of a pier body for limiting, and the stress displacement monitoring module is arranged on the limiting structure. The device can be used for longitudinal displacement constraint and posture correction of bridge cantilever assembly, and is simple and convenient to install and relatively low in cost.

Description

Technical Field

[0001] This invention relates to the field of bridge construction technology, and in particular to a prefabricated visual limiting system for bridge erection. Background Technology

[0002] During bridge construction, steel and concrete beams, as core load-bearing components, are susceptible to longitudinal displacement due to temperature changes, vehicle loads, wind loads, and seismic forces during cantilever assembly and operation. Uncontrolled displacement can lead to serious accidents such as support damage, beam-pier collisions, or even beam collapse. Therefore, precise restraint through a limiting system is necessary. Currently, most mainstream limiting devices rely on on-site welding or pre-embedded casting processes, which are insufficient to meet the demands of modern engineering projects requiring green construction, intelligent operation and maintenance, and cost control.

[0003] Traditional construction techniques have the following limitations: 1. High dependence on welding: Traditional devices often use on-site welding to fix the main body and connecting parts. This requires certified welders, and the welding quality is greatly affected by environmental factors such as wind, rain, and temperature. High temperatures can also damage the original mechanical properties of the steel beams and generate dust pollution. 2. Difficult installation and turnover: Welding to permanent connections takes 3-5 days per set for installation. Dismantling requires cutting and destruction, and the device cannot be reused, resulting in steel waste. The pre-embedded pouring process requires waiting for concrete curing, further extending the construction period. 3. Lack of monitoring function: It can only passively limit movement and cannot monitor the stress state of the device itself and the displacement data of the steel beam in real time. Fault identification relies on manual periodic inspections on the bridge, which is inefficient, risky, and prone to overlooking hidden safety hazards. For example, the longitudinal bridge beam lowering device and its usage method disclosed in patent CN118600853A cannot monitor the stress state of the device itself and the displacement data of the steel beam in real time. 4. High overall cost: Welding labor and consumable costs account for a high proportion. The one-time use of the device increases material costs, and the subsequent manual inspection and fault repair costs further increase the total cost. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a bridge erection prefabricated visual limiting system, which can be used for longitudinal displacement constraint and attitude correction during bridge cantilever assembly. It is easy to install and has a relatively low cost.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: The bridge is equipped with a prefabricated visual limiting system, which includes a limiting structure, a reaction bearing structure, a stress displacement monitoring module, and a connecting structure for cooperation with the lower part of the bridge body. The reaction bearing structure is located on the outside of the limiting structure, and the top of the reaction bearing structure is a bearing end for cooperation with the lower part of the cantilever of the bridge body. The connecting structure is located on the top of the limiting structure, and the inner side of the limiting structure is used for cooperation with the outer side of the pier body for limiting. The stress displacement monitoring module is located on the limiting structure.

[0006] Further or preferred: The limiting structure is a vertically arranged corbel structure.

[0007] The inner side of the limiting structure is provided with a buffer pad for connecting the corbel and the pier body.

[0008] The stress displacement monitoring module includes a stress displacement monitoring element and a data display device, with the stress displacement monitoring element fitted onto the side of the limiting structure.

[0009] The reaction force bearing structure is an inclined reaction force bracket, and an anchoring flange is provided on the lower outer side of the limiting structure. The lower end of the reaction force bracket is connected to the anchoring flange by fasteners.

[0010] The anchoring flange and the buffer pad are respectively located on both sides of the limiting structure.

[0011] The connection structure includes a horizontally arranged connecting beam and a clamp plate located above the connecting beam. The clamp plate is provided with a set of mounting holes that are connected to the bridge body.

[0012] The lower part of one end of the connecting beam is connected to the connecting plate located at the top of the limiting structure by fasteners.

[0013] The limiting structure, reaction bearing structure, and connecting structure are all prefabricated components in the factory and assembled on-site with bolts to form the overall limiting system structure.

[0014] The limiting system is used in two sets of systems that are set opposite to each other, with the two limiting structures of the two sets of systems located on opposite sides of the pier.

[0015] Compared with the prior art, the present invention has the following advantages: 1. Installation efficiency increased by 90%: The all-bolted connection eliminates the need for welding and concrete curing. A team of 3 people can complete the installation of one set of equipment in 2 hours. Compared with the traditional welding process (3 days / set), the efficiency is significantly improved, and the construction cycle is greatly shortened.

[0016] 2. Recycling reduces costs by 60%: Modules can be reused ≥5 times, reducing material costs by 60% per use; bolts are 100% recyclable and reusable, saving more than 8,000 yuan in material costs per set of equipment, meeting the needs of green construction and cost control.

[0017] 3. Intelligent monitoring ensures safety: Real-time monitoring of stress and displacement status reduces fault identification response time from "days" to "minutes", reducing manual inspection workload by 90% and avoiding accident losses caused by hidden safety hazards.

[0018] 4. Significantly reduced operational threshold: No professional welders are required; ordinary construction workers can complete bolt tightening operations after simple training; the visual APP interface is intuitive and easy to understand, and maintenance personnel can complete monitoring and early warning processing without a professional background.

[0019] 5. Enhanced environmental adaptability: Unaffected by wind, rain, low temperatures, or other environmental factors, construction can be carried out under complex weather conditions; no welding fumes are emitted, meeting environmental protection construction standards. Attached Figure Description

[0020] The following is a brief explanation of the contents of each of the accompanying drawings and the markings in the drawings: Figure 1 This is a schematic diagram of the limiting system structure of the present invention.

[0021] Figure 2 This is a schematic diagram of the module assembly of the present invention.

[0022] Figure 3 This is a schematic diagram of the connection layer structure of the present invention.

[0023] Figure 4 This is a schematic diagram of the limiting structure of the present invention.

[0024] Figure 5 This is a schematic diagram of the reaction force bearing structure of the present invention.

[0025] Figures 6 to 8 This is a schematic diagram illustrating the application of the system of the present invention.

[0026] In the picture: 1. Reaction bearing structure, 2. Limiting structure, 3. Buffer pad, 4. Anchoring flange, 5. Stress displacement monitoring element, 6. Connecting plate, 7. Connecting beam, 8. Clamping plate, 9. Connecting bolt, 10. Pier body, 11. Steel beam or concrete beam. Detailed Implementation

[0027] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and through the description of the examples.

[0028] like Figures 1 to 8 As shown, the bridge erection prefabricated visual limiting system is a longitudinal limiting system for the cantilever assembly and erection of steel beams and concrete beams. It belongs to the field of bridge construction technology and is especially suitable for the cantilever assembly and erection of large-span steel beams, steel trusses, steel box girders, and segmental beams. Its core function is to constrain the longitudinal displacement of steel beams, correct their posture, and protect the structural safety during the construction phase.

[0029] The bridge erection prefabricated visual limiting system is a weld-free, easy-to-install, monitorable, and reusable longitudinal limiting system; it includes a limiting structure 2, a reaction force bearing structure 1, a stress displacement monitoring module, and a connection structure for cooperation with the lower part of the bridge body.

[0030] The reaction bearing structure 1 is located outside the limiting structure 2. The top of the reaction bearing structure is a bearing end for cooperating with the lower cantilever of the bridge body. The connecting structure is located on the top of the limiting structure. The inner side of the limiting structure is used for cooperating with the outer side of the pier body 10 for limiting. The stress displacement monitoring module is located on the limiting structure. The limiting structure, reaction bearing structure, and connecting structure are all prefabricated components in the factory and assembled on-site with bolts to form an overall limiting system structure.

[0031] The limiting structure is a vertically arranged corbel structure; furthermore, the inner side of the limiting structure is provided with a buffer pad 3 for connecting the corbel and the pier body to avoid damage to the pier body. When in use, the limiting system adopts two sets of systems arranged opposite each other, with the two limiting structures of the two sets of systems located on opposite sides of the pier body, and the cantilever assembly and erection of steel beams and concrete beams are accurate and reliable.

[0032] The connecting structure includes a horizontally arranged connecting beam 7 and a clamping plate 8 located above the connecting beam. The clamping plate has a set of mounting holes that connect with the bridge body. The lower part of one end of the connecting beam is assembled and connected to the connecting plate 6 located at the top of the limiting structure by fasteners. All connections are fastened with bolts and do not require welding.

[0033] The reaction force bearing structure 1 is an inclined reaction frame bracket. An anchoring flange 4 is provided on the lower outer side of the limiting structure. The lower end of the reaction frame bracket is connected to the anchoring flange by fasteners. The top of the reaction frame bracket is the cantilever limiting end of the beam, which is bolted together without welding.

[0034] Furthermore, the anchoring flange and buffer pad are respectively located on both sides of the limiting structure, ensuring stable and reliable stress distribution.

[0035] The stress displacement monitoring module includes a stress displacement monitoring element 5 and a data display device. The stress displacement monitoring element is attached to the side of the limiting structure. The stress displacement monitoring element and the data display device are connected by communication to transmit data and realize data visualization monitoring.

[0036] This invention achieves the following: 1. A fully bolted connection design, utilizing the bolt holes on the steel beam itself or pre-embedded sleeves in the concrete beam for fixing, completely eliminating on-site welding, and achieving rapid modular assembly through standardized bolt components, reducing the operational threshold and improving installation efficiency; 2. Integration of stress displacement monitoring units and a visualization platform, collecting and displaying key data in real time, enabling the perception of limit status and timely fault warnings; 3. Simplification of construction and operation and maintenance processes, reducing reliance on specialized equipment and personnel, and saving costs throughout the entire lifecycle from installation and use to turnover.

[0037] A preferred embodiment of the present invention is as follows: like Figures 1 to 8As shown, this invention provides a longitudinal restraint system for cantilever assembly and erection of steel beams and concrete beams. This system adopts a "factory prefabricated core component + on-site bolt assembly" model. From top to bottom, it consists of a connection layer, a restraint function layer, a reaction bearing layer, and a stress-displacement monitoring module. Each layer is rigidly connected by standardized bolts. The designed longitudinal restraint capacity is no less than 100 tons. The specific structure is as follows: 1) Connection structure, connecting layer (top layer) - opening positioning / embedded sleeve + steel plate connection: As shown in Area A of Figure 1, the core of this layer is a "pre-drilled hole + clamping plate bolt fastening" structure. Based on the original bolt hole positions of the steel beam, φ33 high-precision mounting holes (hole center distance deviation ≤0.5mm, hole wall perpendicularity ≤0.1°) are pre-drilled on a 16mm thick Q235 clamping plate. The clamping plate is used to clamp the beam bottom plate from both sides using bolts. Seven sets of M30×80 high-strength bolts (with matching flat washers and spring washers) are used to fasten the steel beam to the clamping plate, with the bolt preload torque controlled at 400-450 N·m. Simultaneously, cantilevered multi-section steel sections are welded to enhance the overall rigidity of the connection layer, achieving reliable rigid fixation to the beam. This clamping plate design is adaptable to beam bottom plates with a thickness of 12-25mm.

[0038] 2) Buffer Structure (Auxiliary Layer) - Elastic Buffer + Energy Dissipation Limitation: As shown in Area B of Appendix 1, this structure connects the reaction frame corbel to the pier body and consists of clamping plates and elastic buffer modules. It is connected to the outwardly extending cantilevered I-beams via four sets of M30×80 bolts. An energy dissipation limiting space (achieved through a gasket) and buffer protection facilities are provided near the side of the pier body for approximately 200mm to ensure that the steel beam has the necessary buffer margin during erection.

[0039] 3) The limiting structure and the reaction bearing structure form an integrated reaction limiting frame structure. The reaction frame bracket and beam anchorage are welded in the factory: As shown in Area C of Figure 1, this structure is the core bearing foundation of the system. The reaction frame bracket adopts an integrated structure of "bracket body + anchoring flange". The bracket body is welded from Q235 multi-section steel and rigidly connected to the 20mm thick anchoring flange in the factory by submerged arc welding. After welding, the whole structure is treated with anti-corrosion. The top of the bracket is connected to the multi-section steel of the extension section of the clamping plate by bolts, forming a complete and efficient force transmission path from top to bottom.

[0040] 4) Stress-displacement monitoring module: such as Figure 1 Area D is equipped with stress-displacement monitoring elements. This system module is designed around the stress and displacement monitoring data of the corbel, has a simple and intuitive visualization interface, focuses on corbel status early warning, and has a low operating threshold.

[0041] The dedicated display interface for the bracket data corresponds to area C in Appendix 1. It utilizes a dual-platform architecture: a mobile app (supporting Android / iOS) and a web browser. The app interface primarily displays two sets of monitoring data: ① stress values ​​at dual measuring points on the bracket (root / top bolt areas, displayed separately), and ② longitudinal displacement values ​​of the bracket. It also displays the online status of the equipment, battery level, and data update time. The data is presented in both numerical and dynamic curve formats. The curves can be scaled to trace historical fluctuations over the past 72 hours, facilitating analysis of the bracket's stress and deformation trends.

[0042] Bracket bearing graded early warning mechanism: Two levels of early warning thresholds are set according to the bearing capacity limit of the bracket: yellow warning (stress ≥180MPa or displacement ≥5mm) and red warning (stress ≥235MPa or displacement ≥15mm). When an early warning is issued, the corresponding data area on the interface flashes a red / yellow icon, and simultaneously triggers a dual reminder via APP pop-up and SMS. The SMS content clearly indicates "stress exceeds the limit" or "displacement exceeds the limit" and the specific value, which facilitates maintenance personnel to quickly locate the problem.

[0043] Simplified operation functions: It has the functions of "one-click export of stress and displacement data", "customizable early warning threshold" and "online equipment calibration". No professional software is required. Construction personnel can complete the setting of the cantilever monitoring parameters through their mobile phones, and maintenance personnel can quickly export data for cantilever condition assessment.

[0044] This invention enables a reliable connection between the system and bridge piers and beams, ensuring their reuse. During disassembly, simply unscrewing the bolts on the connecting layer separates the limiting device from the beam. For embedded sleeves in concrete beams, cement mortar can be used for filling and repair after removal.

[0045] Installation process of this invention system: 1) Factory prefabrication and preparation: Process the connecting structure openings, limiting structure, reaction force bearing structure, etc. according to the drawings and assemble them into a whole. Complete the bolt hole tapping and hot-dip galvanizing for corrosion protection. Pre-calibrate the sensor and pack the bolts into boxes according to specifications.

[0046] 2) On-site foundation inspection: Clean the bolt sleeves / bolt holes of the steel beam and check the integrity of the threads; install reflective targets (fixed with bolts) at the designated positions on the bottom plate of the steel beam to ensure stable sensor signal reception.

[0047] 3) Module assembly and fixing: 3 people work together to install the limit device using their own hoisting equipment and a hand chain hoist.

[0048] 4) Monitoring system debugging: Install the data acquisition terminal and connect the sensor lines, log in to the APP on your mobile phone to activate the device, verify the stability of data transmission and the early warning function, and it can be put into use after debugging.

[0049] The system turnover and utilization process of this invention: 1) Disassembly: Construction workers use wrenches to unscrew the bolts of the steel beam connecting plates one by one, hoist the whole structure to the bottom of the bridge, disassemble each module component in turn, collect all bolts and store them in categories (for reuse).

[0050] 2) Inspection and maintenance: Check the module for deformation (if the bolt holes are undamaged, it can be reused), replace the aging buffer block, recalibrate the sensor, and after the inspection is completed, pack and transport it to the next project.

[0051] 3) Secondary installation: According to the new project specifications, replace the connecting bolts of the corresponding length and repeat the installation process to put it into use without the need to re-customize the main module.

[0052] In actual construction, this system is used with cantilever assembly technology. The limiting device improves the efficiency of such large-scale installations by 90%. The monitoring element is connected to the steel truss erection system to monitor the stress and displacement status in real time, reducing the amount of manual inspection work by 90%. This prefabricated stress and displacement visualization monitoring and limiting system has successfully solved the bottleneck of traditional technology and fully meets and exceeds the design and construction requirements.

[0053] The above description is merely an illustration of preferred embodiments of the present invention, and the above technical features can be arbitrarily combined to form multiple embodiments of the present invention.

[0054] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the concept and technical solution of the present invention, or the direct application of the concept and technical solution of the present invention to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. A prefabricated visual limiting system for bridge erection, characterized in that: It includes a limiting structure, a reaction bearing structure, a stress displacement monitoring module, and a connecting structure for cooperating with the lower part of the bridge body. The reaction bearing structure is located on the outside of the limiting structure, and the top of the reaction bearing structure is a bearing end for cooperating with the lower part of the cantilever of the bridge body. The connecting structure is located on the top of the limiting structure, and the inner side of the limiting structure is used for cooperating with the outer side of the pier body for limiting. The stress displacement monitoring module is located on the limiting structure.

2. The bridge erection prefabricated visual limiting system as described in claim 1, characterized in that: The limiting structure is a vertically arranged corbel structure.

3. The bridge erection prefabricated visual limiting system as described in claim 2, characterized in that: The inner side of the limiting structure is provided with a buffer pad for connecting the corbel and the pier body.

4. The bridge erection prefabricated visual limiting system as described in claim 1 or 2, characterized in that: The stress displacement monitoring module includes a stress displacement monitoring element and a data display device, with the stress displacement monitoring element fitted onto the side of the limiting structure.

5. The bridge erection prefabricated visual limiting system as described in claim 3, characterized in that: The reaction force bearing structure is an inclined reaction force bracket, and an anchoring flange is provided on the lower outer side of the limiting structure. The lower end of the reaction force bracket is connected to the anchoring flange by fasteners.

6. The bridge erection prefabricated visual limiting system as described in claim 5, characterized in that: The anchoring flange and the buffer pad are respectively located on both sides of the limiting structure.

7. The bridge erection prefabricated visual limiting system as described in claim 1, characterized in that: The connection structure includes a horizontally arranged connecting beam and a clamp plate located above the connecting beam. The clamp plate is provided with a set of mounting holes that are connected to the bridge body.

8. The bridge erection prefabricated visual limiting system as described in claim 7, characterized in that: The lower part of one end of the connecting beam is connected to the connecting plate located at the top of the limiting structure by fasteners.

9. The bridge erection prefabricated visual limiting system as described in claim 1, characterized in that: The limiting structure, reaction bearing structure, and connecting structure are all prefabricated components in the factory and assembled on-site with bolts to form the overall limiting system structure.

10. The bridge erection prefabricated visual limiting system as described in claim 9, characterized in that: The limiting system is used in two sets of systems that are set opposite to each other, with the two limiting structures of the two sets of systems located on opposite sides of the pier.

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