151 results about "Bridge maintenance" patented technology

The invention belongs to the technical field of bridge maintenance, and discloses a machine vision and digital twinning combined remote repair welding repair method and system for a cracked steel bridge structure. A transmission steel bridge maintenance method mainly depends on manual detection and field repair, and has many limitations in practical application and is difficult to meet bridge maintenance requirements. The method comprises the following steps: acquiring steel bridge data through a detection robot to identify a steel bridge crack, generating a three-dimensional model of the steel bridge crack based on the steel bridge crack data, performing finite element stress analysis, generating a crack welding strategy, and issuing the crack welding strategy to a welding robot to execute a welding action; further dynamically mapping the welding information to the three-dimensional model of the crack, fusing the three-dimensional dynamic model of crack repair into a VR operation interface, and monitoring the welding process of the welding robot through the VR operation interface; and finally, the welding robot detects the repair integrity of the steel bridge crack, and the repair integrity information is updated to the three-dimensional dynamic model of steel bridge crack repair.

The invention relates to a bridge degradation identification and maintenance decision support method and system based on a knowledge graph, belongs to the technical field of traffic infrastructure intelligent operation and maintenance and engineering information processing, and solves the defects of weak data fusion capability, opaque causal modeling and non-traceable decision support in the prior art. The method comprises the following steps: acquiring and preprocessing multi-source heterogeneous data to generate a standardized data set; semantic alignment is carried out, and candidate entities and relations are extracted; constructing a knowledge graph body and loading the knowledge graph body into a knowledge graph; a self-adaptive quantile threshold value is adopted to binarize the factor intensity and the disease severity sequence, and a smooth point mutual information and a Spearman correlation coefficient are fused to learn a causal weight; complementing the influence relation of factors on the bridge through graph reasoning and calculating the weight; and finally, calculating a bridge degradation risk score, and outputting a high-confidence influence path based on a shortest path algorithm. According to the method, multi-source data fusion and degradation causal chain explicit modeling are realized, and a scientific basis is provided for a bridge maintenance decision.

The invention relates to the technical field of bridge engineering maintenance decision, and discloses a bridge maintenance decision method based on big data. The method comprises the steps of collecting bridge monitoring data through a sensor network, performing hierarchical processing on an original data stream, identifying and packaging abnormal fluctuation, trend change and a periodic mode, and forming a structured health event sequence. And dynamically constructing and updating the digital sign profile of the bridge in combination with the design parameters and the material degradation model. And when a decision is triggered, simulating a performance evolution path under multi-factor coupling based on the profile, generating a future maintenance scene set, and matching and assembling a preliminary plan from historical cases and the knowledge graph. And outputting a final maintenance instruction list sorted according to priorities by performing resource and time coupling analysis and multi-target tradeoff on all plans. According to the method, deep analysis and prospective simulation of the bridge state are realized, and the intelligence, accuracy and performability of maintenance decision making are improved.

A sensor-based digital twin system operable to determine bridge load rating, enhance bridge safety, extend infrastructure lifespan, and reduce maintenance costs of a bridge. The sensor-based digital twin system uses real-time data to update virtual models of physical assets that enables a more dynamic and precise understanding of bridge conditions, which allows for real-time monitoring of a load assessment of a bridge and can identify the need for bridge maintenance.

The invention discloses a concrete bridge preventive maintenance decision-making method based on degradation prediction, and relates to the technical field of bridge degradation prediction maintenance, and the method comprises the steps: collecting the degradation characteristic data of a concrete bridge through a bridge detection device; according to the method, various types of degradation characteristic data are collected through the bridge detection equipment, the standardized bridge state characteristic vector set is generated, the data-mechanism fusion inversion model is adopted, the actually collected data and the inherent mechanism of bridge degradation are combined, the estimation result is made to better conform to the actual situation, and the estimation accuracy is improved. Dynamic data assimilation is carried out according to a state space model, a probabilistic estimation set of a degradation driving state is input into a predetermined bridge degradation mechanism model for long-term deterministic simulation prediction to generate a plurality of future performance degradation paths, and all the paths form a degradation track cloud picture reflecting prediction uncertainty; the optimal maintenance strategy set can reduce the expected life cycle cost to the maximum extent on the premise that the bridge maintenance requirement is met.

The invention relates to the technical field of rail transit bridges, in particular to a rail transit bridge maintenance decision-making method based on an analytic hierarchy process and a matrix type double-control method. Comprising the following steps: S1, decomposing and hierarchically dividing components in the rail transit bridge to obtain a clear hierarchical structure; s2, performing pairwise comparison on the components by adopting an analytic hierarchy process to form a judgment matrix, and calculating a consistency index and a feature vector to obtain a relative weight of each hierarchy and the component; s3, evaluating and scoring bridge diseases by using a matrix type double-control method; and S4, based on the comprehensive score of the matrix type double-control method, the maintenance decision of the rail transit bridge can be judged. Compared with the prior art, the analytic hierarchy process and the matrix type double-control method improve the accuracy and practicability of the maintenance decision through iterative optimization, the importance and health conditions of different components in the rail transit bridge maintenance decision can be comprehensively evaluated, and reliable technical support is provided for the maintenance decision and maintenance management of the rail transit bridge.

The utility model discloses a welding device for repairing a bridge inhaul cable, which relates to the technical field of bridge maintenance and comprises an inner sheath, outer sheaths are rotatably mounted on the front side and the rear side of the inner sheath respectively, and the two outer sheaths are rotatably connected with the inner sheath through two rotating assemblies respectively. Each of the inner sheath and the two groups of outer sheaths comprises two shells which are symmetrically distributed up and down, two groups of locking assemblies are symmetrically and fixedly mounted on the left and right sides of the shells of the inner sheath and the two groups of outer sheaths, and the arc-shaped groove of the driving wheel is tightly attached to the curved surface of the inhaul cable, so that the contact area and the friction force are effectively increased; therefore, it is ensured that the device has stable driving adhesive force and crawling capacity on an inclined or vertical cable face, self-locking is formed through a locking assembly and a limiting tooth block pressed by a spring through a rack, secondary fastening is assisted by a bolt, double anti-sliding guarantee is provided for an operation position, displacement generated in the welding process is prevented, and the service life of the device is prolonged. And the precision and continuity of repairing operation are ensured.

The present application relates to the field of bridge maintenance, and discloses a landscape bridge steel structure pulse cleaning device, which comprises a supporting seat, a main flow pipe, a push flow assembly, a driving assembly, a reset assembly and a cleaning assembly. The supporting seat is fixedly connected with the main flow pipe, and the push flow assembly is slidably arranged in the main flow pipe. The driving assembly is arranged on the supporting seat and used for driving the push flow assembly to move to compress the reset assembly to accumulate potential energy. The reset assembly releases the potential energy to drive the push flow assembly to quickly reset, extrude the liquid in the main flow pipe to generate a pulse water flow. The cleaning assembly is arranged at both ends of the main flow pipe and used for switching the fluid discharge path and opening the cleaning port. The present application uses pulse jet to improve the stripping efficiency of rust on the surface of the steel structure. The internal pipeline is self-cleaned through the cleaning assembly, so that the mixed corrosion of the chemicals is avoided. The negative pressure generated by the push flow assembly can suck and recycle the accumulated water in the gap, prevent secondary rust, and solve the problem that the secondary rust is caused by the residual accumulated water after the cleaning of the complex steel structure surface.

The application discloses a bridge maintenance platform and a maintenance method, wherein the bridge maintenance platform comprises a longitudinal support beam and a walking mechanism slidingly installed on the longitudinal support beam; the longitudinal support beam is horizontally arranged and fixedly connected with a bridge; a manned lifting mechanism is hung below the walking mechanism; and the walking mechanism drives the manned lifting mechanism to move horizontally along the longitudinal support beam. The bridge maintenance platform can be fixed on the bridge, does not affect the traffic on the bridge and the navigation under the bridge, can be fixed on the bridge for a long time, can be used for the bridge inspection and maintenance at any time, and the staff can stand on the bridge maintenance platform to control the movement of the bridge maintenance platform to conduct the dead angle-free inspection and maintenance on each part of the bridge without the need of erecting a scaffold, thereby saving time and effort. The bridge maintenance platform is not affected by the traffic on the bridge and the topography and geomorphology under the bridge, and is suitable for the maintenance of various bridges.

The application discloses a bridge beam bottom cleaning adjustable frequency oscillation end effector and force control cleaning method, and belongs to the technical field of bridge maintenance. The end effector comprises a connecting flange, a frequency modulation oscillation driving module, a flexible transmission rod and a cleaning brush head module, integrates a 0.1N precision force sensor and a low-pressure spraying assembly, and the oscillation frequency is adjustable at 0-50 Hz. The cleaning method adopts a lightweight visual model to identify stains, matches a stain-cleaning parameter knowledge base, realizes closed-loop regulation of contact force through impedance control and model predictive control, automatically reduces the oscillation amplitude and adjusts the working pose when the contact pressure exceeds the 20N threshold, and realizes multi-stage safety protection. The application has the advantages of compact structure, small load, adaptation to complex curved surfaces, self-adaptation to different stain types, solution to the problems of high risk of manual cleaning, poor adaptability of existing equipment and easy damage to bridge structure, and application to unmanned aerial vehicle double-mechanical-arm cooperative bridge beam bottom intelligent cleaning.

The invention discloses a highway bridge maintenance method and system based on an unmanned aerial vehicle, and relates to the technical field of image processing. Comprising the steps that an unmanned aerial vehicle collects a surface original image of a bridge along a preset track at a constant inclination angle, and records a space curvature to form an image frame sequence set with a space curvature index; carrying out local region division on the bridge surface according to image texture change features in the image sequence, and generating an image texture curvature partition mask; according to the image texture curvature partition mask, extracting corresponding curvature partition content from the surface original image, and generating a structured partition image set; performing multi-scale crack extraction and coding on the structured partition image set, and performing aggregation through morphological consistency analysis between scales to generate an aggregation morphological vector; and comparing the polymerization form vector with a corresponding form vector of a historical maintenance period, identifying growth, expansion and new areas of the crack, and outputting a bridge crack change distribution result.

This invention belongs to the field of bridge maintenance technology and proposes a method for reinforcing cracks in bridge corbels, including the following steps: S1. Scaffolding erection; S2. Bridge bottom surface cleaning; S3. Vertical drilling of the bridge; S4. Erection of the reinforced box girder; S5. Fixing of the reinforced box girder; S6. Side formwork erection; S7. Grouting; S8. Formwork removal; S9. Groove filling and post-construction maintenance. This invention provides a strong support to the original bridge bottom surface by reinforcing the box girder and injecting reinforcing grout into the cracks and grouting cavities. After the grout solidifies, it not only repairs the damaged cracks inside the corbel but also tightly bonds the reinforced box girder, the solidified grout, and the original bridge structure together, improving the reinforcement effect and overall load-bearing capacity of the bridge corbel.

The utility model provides a bridge expansion joint. The bridge expansion joint comprises two main bodies, a rubber strip and two strip-shaped air bags, wherein the two main bodies are fixed to the two sides of a bridge preformed groove correspondingly; the rubber strip is arranged between the two main bodies; the adjacent side faces of the two main bodies are each provided with an upper protruding part and a lower protruding part, so that a groove structure is formed. The two strip-shaped air bags are respectively arranged in the two groove structures; moreover, the two sides of the rubber strip are inserted into the two groove structures respectively, located on the lower side of the strip-shaped air bag and provided with extension parts, and the extension parts extend upwards and are bent towards the openings of the grooves so as to wrap the outer side of the strip-shaped air bag. And when the adhesive tape needs to be replaced, the air in the strip-shaped air bag is released, so that the strip-shaped air bag can be folded, and the pressure borne by the adhesive tape is eliminated. According to the bridge expansion joint, the adhesive tape can be rapidly replaced, and the bridge maintenance efficiency is improved.

The utility model discloses a bridge expansion joint gap detection tool relates to bridge maintenance technical field, the utility model discloses a mounting block, the bottom of one side of mounting block is fixed with the extension plate, the extension plate is away from the one side structure of mounting block and has the triangle gap, the side of triangle gap is marked with the scale line, the conical block is inactivity and is embedded in the triangle gap, the correction mechanism is used for correcting the perpendicularity of conical fast, the correction mechanism includes the slide that is fixed in the top of conical block, the side of mounting block is close to the upper interval fixed establishment of extension plate and has the guide rod. The utility model uses the extension plate with equilateral triangle gap to cooperate conical block and measures, the vertex of triangle gap is as the scale zero starting point, and the width is directly read through the scale of the contact point of conical block and gap, and compared with traditional plug gauge or caliper, this kind of measurement mode can be more accurate to adapt to the irregular gap shape.

The utility model discloses a road and bridge maintenance device, and particularly relates to the field of road and bridge maintenance, which comprises a sweeping frame, a push handle is fixedly mounted at the top of the sweeping frame, a plurality of moving wheels are arranged at the bottom of the sweeping frame, and a swept seam collecting mechanism and a dust collecting mechanism are arranged at the bottom of the sweeping frame. The sweeping seam collecting mechanism comprises a rotating motor fixedly installed at the top of the sweeping frame, a first belt wheel is arranged on one side of the rotating motor and is arranged in a horizontal state, a synchronous belt is rotatably installed on the outer wall of the first belt wheel and is arranged in a vertical state, and a second belt wheel is rotatably installed at the bottom of the synchronous belt; the sweeping wheel capable of continuously rotating is arranged at the bottom of the motor sweeper, sundries in gaps are swept out, collected and treated through the sweeping wheel, and generated dust is collected, so that the gaps are thoroughly cleaned, and the situation that the maintenance effect is affected due to the fact that the sundries are left in the gaps is avoided.

This invention discloses a controllable-range spraying device for road and bridge maintenance, belonging to the field of road and bridge maintenance technology. It includes: multiple partition plates connected to a rotating box and a fixed box, forming multiple partitioned cavities within the rotating and fixed boxes; multiple sets of pressure blocks, each set consisting of two symmetrically arranged pressure blocks that slide along the walls of the partitioned cavities, each pressure block having a through groove along one vertical direction; and multiple flow boxes connected to the tops of the fixed and rotating boxes, respectively, and communicating with both the fixed and rotating boxes. In this invention, the pressurization effect of the pressure blocks on the clean water effectively increases the water output velocity of the spray heads, enabling each spray head arranged along the length of the rotating and fixed boxes to have an equivalent spray intensity, thereby improving the uniformity of spraying the road and bridge concrete surface and enhancing the maintenance quality.

The application relates to a bent cap crack reinforcing structure and belongs to the technical field of road and bridge maintenance. The bent cap crack reinforcing structure comprises a first mounting plate, a second mounting plate, a first connecting plate, a fastening assembly and a bonding layer, the first side of the first mounting plate is used for being connected with the first side of a bent cap, the first side of the first mounting plate is provided with a plurality of first grooves; the first side of the second mounting plate is used for being connected with the second side of the bent cap; one end of the first connecting plate is connected with the first mounting plate, the first connecting plate is parallel to and spaced from the second mounting plate; the fastening assembly connects the first connecting plate and the second mounting plate, the fastening assembly is used for applying prestress to the second mounting plate and the first connecting plate; the bonding layer is arranged on the first side of the first mounting plate and the first side of the second mounting plate, the bonding layer fills the first grooves on the side close to the first mounting plate, and the bonding layer is used for bonding the first side of the first mounting plate and the bent cap and the second side of the second mounting plate and the bent cap. The application can improve the problem of poor reinforcing reliability of a steel plate on a bent cap.

The invention relates to a bridge technical condition rating prediction method and system fusing maintenance process information. The method comprises the following steps: constructing a bridge maintenance process information data set based on a contour coefficient method and a K-means algorithm, and constructing a bridge regular inspection information database; carrying out discretization processing on the numeric data after data cleaning, and converting the numeric data into classified data; calculating Cramer's V coefficients between all the classification data and the bridge technical condition rating information, based on the selected feature data, converting the data with classification data attributes into one-hot codes, and adopting a principal component analysis method to reduce dimensionality to obtain dimensionality-reduced classification data; performing normalization and equalization processing to obtain a data set for model training; training a bridge technical condition rating prediction model by using a PSO-LightGBM algorithm; and predicting a bridge technical state rating level by using the prediction model. According to the invention, the accuracy of bridge technical condition rating prediction is improved.

The utility model discloses a bridge type steel expansion joint cleaning device relates to bridge maintenance technical field, including the grip lever, and the adjustable length adjusting lever is arranged in the grip lever, and the tail end fixed mounting of grip lever has the anti -drop handle, is provided with length locking mechanism on the grip lever and length adjusting lever, and the bottom of length adjusting lever is provided with the cleaning plate angle adjusting mechanism, is provided with the cleaning plate on cleaning plate angle adjusting mechanism, and the adjustable shovel knife is arranged on the cleaning plate, and is provided with shovel knife fixing mechanism on the cleaning plate and shovel knife, and is provided with cleaning illumination mechanism on length adjusting lever, in the utility model, through the setting of cleaning plate, shovel knife, cleaning plate angle adjusting mechanism, shovel knife fixing mechanism, cleaning illumination mechanism, length adjusting lever, length locking mechanism etc. structure, can shovel and dig out stubborn material, and the cleaning effect of expansion joint is better, and main spotlight and side photo lamp can light the space in expansion joint, and the expansion joint is observed conveniently, and the use of device is convenient.

The utility model belongs to the technical field of road and bridge maintenance, and particularly relates to a road and bridge crack reinforcing structure which comprises a plurality of connecting frames, a supporting rod is arranged below the connecting frames, the connecting frames are detachably connected with the supporting rod, the two ends of the bottom of each connecting frame are fixedly connected with first protruding blocks, and the first protruding blocks are fixedly connected with second protruding blocks. A second protruding block is fixedly connected to the center of the bottom of the connecting frame, a connecting part is arranged on one side of the first protruding block, and a positioning rod is installed on the connecting part. Connection of pavements on the two sides of a gap can be enhanced, the cracked pavements can be joined, the contact area between a repairing material and the novel pavement is increased, and therefore the fusion effect of the repairing material and the pavements is improved, cracks and the repairing material are not prone to cracking after repairing, deformation of the material after expansion caused by heat and contraction caused by cold is reduced through filling of the novel pavement, and the service life of the repairing material is prolonged. Therefore, after repairing, the repaired position of the pavement is smoother.

This invention provides a dynamic management method and system for multi-level assessment indicators of the resilience of nearshore bridges throughout their entire life cycle, relating to the field of structural resilience assessment and management technology. The method includes: acquiring multi-source heterogeneous maintenance data streams throughout the entire life cycle of the nearshore bridge; processing these data streams through time-series alignment and feature dimensionality reduction mapping to obtain a basic feature matrix of the bridge's service status; and performing conditional routing and data stream processing based on this basic feature matrix to obtain corrosion evolution calculation potential field distribution data, structural dynamic stiffness attenuation tensor, and structural life-cycle degradation confidence distribution vector. This invention accurately obtains resilience indices that truly reflect the bridge's resistance to degradation through multi-step quantification calculations, clarifies the sensitivity differences of assessment nodes, formulates differentiated dynamic maintenance strategies, and constructs a closed-loop management system throughout the entire process, thereby achieving intelligent bridge maintenance, improving maintenance efficiency, and reducing costs.

The utility model provides a reinforcing device for highway bridge maintenance, which comprises a reinforcement cage sleeved on the periphery of a pile. The positioning structures are clamped to the top end and the bottom end of the reinforcement cage, the positioning structures at the upper end and the lower end are fixed to the bottom face of a bridge and the top face of a pile base through expansion bolts correspondingly, each positioning structure comprises a semicircular positioning steel plate, and the positioning steel plates are connected with the positioning structures through bolts. The radian of the inner sides of the positioning steel plates corresponds to the radian of the side wall of the pile, the two positioning steel plates are combined to form a circular ring, and the inner diameter of the circular ring corresponds to the diameter of the pile. The reinforcing device for highway bridge maintenance has the advantages that the stability of a bridge pile foundation can be enhanced conveniently, and normal use and safety of a bridge are guaranteed.

The invention provides remote control road bridge maintenance equipment, which relates to the technical field of bridge maintenance, and comprises a bridge floor obstacle monitoring system, an obstacle recognition system, an obstacle cleaning execution unit and a positioning system, through the arrangement of the bridge floor obstacle monitoring system, the obstacle recognition system, the obstacle cleaning execution unit and the positioning system, when the bridge is subjected to daily maintenance and an obstacle appears on the bridge due to reasons, the bridge floor obstacle monitoring system uploads an image book of the obstacle; the obstacle recognition system is used for recognizing and confirming an obstacle, then the positioning system is used for positioning the obstacle and the obstacle cleaning execution unit, relevant position information of the obstacle is sent to the obstacle cleaning execution unit through the instruction sending module, and the obstacle cleaning execution unit is used for remotely and automatically cleaning the obstacle. By means of the design, obstacles on the bridge can be remotely cleaned, maintenance of the bridge is completed, and traffic is prevented from being affected.

This utility model relates to the field of railway bridge supports, and discloses a stable support railway bridge maintenance support, including a support frame. Auxiliary components are provided on the outer surface of the support frame, and two sets of support components are provided inside the support frame. Each support component includes a top frame rod. Support rods are fixedly connected to both ends of the inner wall of the support frame. Multiple sets of skeleton rods are fixedly connected between the support rods and the top frame rods. A support member is fixedly installed on the upper surface of the support rod near the right end of the skeleton rod. In this utility model, through the mutual cooperation of the top frame rod, support rod, and skeleton rods in the equipment, a triangular support structure is formed by the top frame rod, support rod, and skeleton rod. Combined with the auxiliary support function of the auxiliary components, the maintenance support can effectively distribute the pressure on the bridge, enhancing the overall stability and load-bearing capacity of the support.

The invention provides a bridge intelligent unmanned aerial vehicle coating system, a control method and equipment of the bridge intelligent unmanned aerial vehicle coating system and a storage medium, and relates to the technical field of bridge maintenance. The detection module is used for positioning a target bridge, collecting laser point cloud data, high-definition image data and an infrared thermogram, and detecting real-time wind speed and wind direction data and real-time coating thickness; the control module is used for controlling the unmanned aerial vehicle to avoid obstacles, identifying a bridge defect area, generating an initial spraying path, correcting a wind-resistant path based on the real-time wind speed and wind direction data, and rechecking the apparent quality of a coating after spraying is completed; and the spraying module is used for carrying out polishing operation on the surface of the bridge surface defect area, adjusting spraying parameters based on the real-time wind speed and wind direction data and the real-time coating thickness, carrying out spraying operation on the bridge surface defect area, and carrying out supplementary spraying operation when the appearance quality of the coating is unqualified through reinspection. According to the invention, full-process intelligent, precise and efficient control of bridge coating under extreme climate can be realized.

An integrated overturning cover plate for hazardous chemical substance protection relates to the technical field of bridge deck runoff treatment and comprises plugging devices arranged in drainage holes in two sides of a bridge deck, each plugging device comprises a water grate, a cover plate and a cylinder, the water grates are arranged above the drainage holes, the overturning cover plates are arranged above the water grates, the cylinders are arranged in the drainage holes, and the cover plates are arranged in the drainage holes. The cylinder is hinged to the lower end face of the water grate, the upper end of a cylinder guide rod is rotatably connected with the cover plate, the cylinder is connected with a first air pipe and a second air pipe on anti-collision walls on the two sides of the bridge floor, the first air pipe is connected with an air pipe connector at one end of the cylinder through a hose, and the second air pipe is connected with an air pipe connector at the other end of the cylinder through a hose; according to the water grate, the cover plate capable of being turned is arranged on the water grate, so that the drainage holes are quickly blocked, the probability that hazardous chemicals flow into a water body is reduced, and the health of bridge maintenance personnel is protected; the edge of the cover plate is provided with a chamfer structure, and the chamfer structure is matched with the lower soft sealing ring, so that a gap between the cover plate and the water grate is reduced, and untight sealing caused by gravels and the like is avoided.

The invention relates to the technical field of old bridge maintenance, in particular to an old bridge maintenance and reinforcement construction method which comprises the specific steps that S1, a protection system is laid, the structure state is monitored in real time in the construction process, and shutdown adjustment is conducted immediately when hidden dangers are found; s2, repairing the hinge joint, wherein the hinge joint is chiseled away, steel bars are planted, hinge joint concrete is poured, and concrete is paved; s3, the beam plate is replaced, and appearance inspection and quality acceptance are conducted on the replaced beam plate; s4, bridge jacking and support replacement are conducted, a hydraulic synchronous jacking system is erected and comprises a jacking system, a monitoring system and a temporary supporting system, and multi-point synchronous jacking of a beam body is achieved through control of a PLC computer; s5, completion acceptance is carried out; a protection system and a limiting steel truss are arranged and used for limiting transverse displacement in the bridge jacking process and reducing the bridge instability risk, meanwhile, a beam body posture safety monitoring facility is arranged and used for monitoring the beam body posture, and when abnormity occurs, an early warning mechanism is triggered, and construction safety is ensured.

This invention discloses a synchronous tensioning and replacement device and construction method for highway bridge hangers, relating to the field of highway bridge maintenance and reinforcement. It includes a T-shaped connecting beam, the top of which is fixed to a beam at the top of the bridge via a connecting plate. Inclined plates are symmetrically arranged on both sides of the connecting beam, and a pair of cable reels are symmetrically arranged on both sides of the top of the connecting beam. Openings are provided on the connecting beam corresponding to the cable reels. A connecting sleeve is fitted on the side of the inclined plate away from the connecting beam. This invention achieves synchronous tensioning and reliable unidirectional locking of the hangers through the cooperation of the cable reels in the top fixing unit, the clamping plate in the bottom fixing unit, and the internal one-way locking mechanism. This effectively avoids safety hazards such as hanger slippage, loosening, and sudden changes in localized stress on the bridge caused by replacing hangers one by one or unreliable clamping in traditional construction methods.

The utility model provides a kind of temporary sling reinforcing and reinforcing structure for replacing short sling of suspension bridge, it is related to bridge maintenance construction technical field, the sling reinforcing and reinforcing structure includes upper clamping plate, lower clamping plate, reinforcing plate and lifting lug plate, wherein lifting lug plate is fixed on upper clamping plate, upper clamping plate, lower clamping plate are respectively located the upper surface and lower surface of the upper box girder plate of steel box girder, and upper clamping plate, lower clamping plate are locked by first fastening bolt, so it can be firmly fixed reinforcing plate on the upper box girder plate of steel box girder, and reinforcing plate group can strengthen the connecting strength of lower box girder plate and lifting lug plate, while improving the carrying capacity of lifting lug plate, reduce the deformation of steel box girder under sling tension, to meet the deformation requirement of temporary sling, the sling reinforcing and reinforcing structure can make reinforcing plate group as split type structure, and reinforcing plate group is installed in steel box girder in dispersed state conveniently.

The invention discloses a large-model multi-agent-based bridge management and maintenance knowledge graph construction method, system and device and a medium, and the method comprises the steps: processing a bridge inspection report, converting an original text into a unit through a decomposition agent, and building a text annotation database; the method comprises the following steps: taking a subject text block as input, extracting a triple by an extraction agent, then checking whether the extracted triple conforms to a bridge detection domain ontology and domain knowledge or not by a verification agent, finally correcting the triple with errors by a correction agent, iteratively extracting, verifying and correcting the triple, and outputting a high-quality triple; establishing a dynamic knowledge learning mechanism, and updating a knowledge base; constructing an initial knowledge graph according to the verified knowledge triad; and the review agent reviews the initial knowledge graph and feeds back a review result to the construction agent for iterative updating, and finally, the bridge management and maintenance knowledge graph is constructed. According to the method, the accuracy and the fact consistency of the atlas data can be ensured.