223 results about "Bridge maintenance" patented technology

The invention relates to the technical field of bridge engineering construction, in particular to a bridge deck concrete flatness detection and correction method, which comprises the following steps: synchronously acquiring bridge deck point cloud, elevation and crack data through a three-dimensional laser scanner, a laser profiler and an ultrasonic sensor, and fusing to generate a three-dimensional digital model; defects such as local protrusions and wave deformation are recognized based on an intelligent analysis algorithm, causes are analyzed, and correction process parameters such as milling, cladding, grouting or ultrathin layer pouring are generated in a targeted mode; operation is executed through equipment such as a finish milling machine, closed-loop control is realized by combining real-time monitoring of a laser profiler, and finally, a traceable digital file is formed through laser detection, inspection and acceptance of an unmanned aerial vehicle and data archiving. By means of the method, the pass percent of the flatness of the bridge floor can be increased to 94% or above, the maximum height difference is controlled within 3 mm, the maintenance period of the bridge is prolonged, and the maintenance cost is reduced.

The invention relates to the technical field of intelligent operation and maintenance, in particular to a bridge maintenance system based on data analysis, which comprises a multi-source data acquisition module, a fatigue degradation monitoring module, a wave velocity anomaly positioning module, a risk collaborative judgment module and a maintenance task planning module. According to the method, structural fatigue characteristics are subjected to cross validation by integrating two-dimensional data of a strain sequence and a stress wave propagation parameter, and a dynamic window range deviation degree is adopted to replace a static threshold value to establish a datum reference linked with a bridge bearing period; a same-path propagation difference value is extracted by using a high-frequency and low-frequency stress wave frequency band energy separation technology to detect continuous overrun, and a degradation trend weight and a priority list of damage space distribution are generated in combination with multi-index coexistence verification and a hierarchical sorting strategy; resource allocation is optimized by integrating a multi-level response mechanism of emergency repair coordinate positioning, directional detection and regular inspection, accurate crack positioning is achieved, the early degradation trend capturing capacity is enhanced, the misjudgment risk is reduced, and an operation and maintenance response chain is shortened.

The invention relates to the technical field of engineering structure health monitoring, and discloses a method for evaluating the fatigue life of a main beam based on sample continuous increment, which comprises the following steps: acquiring multi-modal monitoring data including physical parameters of strain, displacement and acceleration and external factor data of environmental temperature and humidity and traffic flow information; performing multi-source data fusion by using an adaptive feature extraction network; constructing a dual-knowledge consolidation incremental learning framework, and keeping the memory of historical knowledge when newly added data is processed; performing uncertainty quantification on a prediction result based on Bayesian deep learning, and establishing a risk early warning mechanism; according to the method, the problem of disastrous forgetting in the model updating process is effectively solved, and a relatively high historical knowledge retention rate is kept; a scientific basis is provided for bridge maintenance and maintenance decision making, and maintenance resource allocation is optimized; the method has excellent adaptability and generalization ability, and realizes continuous monitoring and evaluation in the whole life cycle.

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 provides a bridge deformation detection method based on three-dimensional laser scanning and a multi-scale algorithm, and the method specifically comprises the steps: carrying out the detection of the overall and local deformation of a bridge through employing the fusion of a three-dimensional laser scanning technology and the multi-scale algorithm, the method comprises the following steps: firstly, by introducing a geometric constraint registration algorithm, a cascade noise reduction model and a multi-stage slice center point offset analysis technology, realizing synchronous accurate quantification of local settlement of a bridge floor and overall inclination of a bridge pier; and in combination with load distribution verification, the spatial correlation between the deformation rule and the traffic load is revealed, and a scientific basis is provided for bridge safety assessment and reinforcement decision making. The bridge safety monitoring precision is remarkably improved, intelligent system development is supported, and guidance is provided for bridge maintenance.

The invention relates to the technical field of bridge maintenance, in particular to a road and bridge spraying maintenance system and a control method thereof, and the system comprises a water supply execution module, a regional spraying module, an intelligent control module, a remote response module, a dynamic adaptation module, a parameter setting module and a regional adaptation module. The water supply execution module provides a pressure water source through an integrated water tank and a booster pump. A water supply header pipe is arranged along the inner side of a bridge deck guardrail. The regional spraying module is provided with spraying assemblies and box chamber inner cavity adjustable sprayers in a partitioned mode. The intelligent control module dynamically adjusts spraying parameters and opening and closing of branches; the dynamic adaptation module realizes displacement synchronization of the pipeline and the hanging basket through a quick disassembly joint and a main pipe extension section; the parameter setting module switches the spraying mode according to the concrete age and the surface temperature; the area adaptation module controls pipeline separation and connection and nozzle angle correction. The problems of insufficient corner coverage and poor timeliness are solved, and the maintenance uniformity and the structural durability are improved.

The utility model relates to the technical field of expansion joint distance measurement, in particular to a municipal bridge expansion joint width real-time distance measurement device, which comprises two grab handles, a measuring mechanism is fixed at the rear end of each grab handle, a supporting mechanism is fixed at the rear end of each measuring mechanism, and an inner supporting rod mechanism is mounted between the two supporting mechanisms. An outer supporting rod mechanism is installed between the two measuring mechanisms. The measuring mechanism comprises a mounting seat and a connecting plate, the connecting plate is fixed at the rear end of the mounting seat, positioning seats are fixed on two sides of the front end of the connecting plate, a laser range finder is mounted on the inner side of the mounting seat, a detection bolt is in threaded connection with the middle of the outer side of each positioning seat, and a lead rod is fixed at the front end of each detection bolt. And the device can change along with the width change of the expansion joint, so that the actual width of the expansion joint can be truly reflected by the measurement data, and a reliable basis is provided for municipal 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 discloses a bridge maintenance dynamic decision-making method and system based on multiple dimensions and maintenance standards, and belongs to the technical field of bridge intelligent maintenance, and the method comprises the steps: collecting static basic data and dynamic basic data of a to-be-maintained bridge, and evaluating and determining key parts / components, key diseases, four-stage maintenance standards and three-dimensional indexes; a maintenance scheme library formed by different maintenance schemes is determined, and a to-be-maintained bridge and a maintenance project demand analysis library of the maintenance project amount are screened and determined; analyzing and generating a cost benefit model; and according to the cost-benefit model, calculating the maintenance cost required by the to-be-maintained bridge corresponding to different maintenance standards in the maintenance project demand analysis library and the maintenance benefit generated by maintenance, determining a maintenance project plan library and making a maintenance plan. The bridge maintenance dynamic decision-making method and system disclosed by the invention are helpful to grasp the development trend of bridge technical conditions, standardize maintenance decision-making behaviors, improve the scientific decision-making level and effectively carry out preventive maintenance.

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.

The utility model provides a bridge expansion joint with an anti-seepage structure, which comprises a U-shaped groove, a first step surface, a second step surface and a drainage pipe group which are arranged below the bridge expansion joint, a bottom plate of the U-shaped groove is arranged to be a slope-shaped bottom plate with a high right part and a low left part, a drainage port is arranged at the left end of the slope-shaped bottom plate, and the bottom of the drainage port is connected with the drainage pipe group. The drainage pipe group comprises a first drainage pipe, a circular filter screen, a second drainage pipe and a connecting bolt which are sequentially arranged from top to bottom; the upper end of the first drainage pipe is fixedly mounted at the bottom of the drainage port. According to the technical scheme, the U-shaped groove and the drainage pipe set with the circular filter screen are adopted, leaked water can be discharged in time under the condition that the water stop strip fails and leaks water, meanwhile, the bottom plate of the U-shaped groove is a slope-shaped bottom plate with the high right portion and the low left portion, pollutants are prevented from being deposited at the bottom of the U-shaped groove, and the service life of the water stop strip is prolonged. And large pollutants can be filtered and blocked through the circular filter screen, pipeline blocking is prevented through regular replacement, and bridge maintenance is facilitated.

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 road surface repairing device for highway bridge maintenance relates to the technical field of road surface repairing devices, and particularly relates to a road surface repairing device for highway bridge maintenance, which comprises a bottom ring seat, which is used as a basic component of the whole device and is used for assembling and bearing various processing mechanisms and their subordinate substructure components; a driving switching mechanism, which is arranged at the inner middle part of the bottom ring seat and is used for driving other mechanisms of the whole device to perform function switching processing; and a pit part cleaning mechanism, which is arranged at one side of the inner part of the bottom ring seat close to the edge. By increasing and arranging the end processing mechanism, on the one hand, the silicon rubber film piece model in contact with the inner wall of the pit part can be melted by the flame sprayed by the flame gun, so as to improve the bonding stability of the outer wall of the model and the inner part of the pit part, and on the other hand, the asphalt repairing filler in the pit part can be heated and warmed by the flame sprayed by the flame gun, so as to improve the fluidity of the asphalt repairing filler, facilitate the adhesion of the asphalt repairing filler and the pit part, and also facilitate the subsequent flattening and compaction processing.

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 the technical field of bridge maintenance, in particular to an intelligent maintenance decision-making method based on bridge big data, and the method comprises the following steps: collecting structure response data, environment data and traffic load data of a bridge through a sensor array, an inspection robot and a manual input system which are arranged at each key part of the bridge; the structure response data, the environment data and the traffic load data are subjected to cleaning, alignment and space-time fusion, a standardized bridge state big data set is formed, the bridge state big data set comprises historical and real-time data of the bridge, comprehensive and real-time state monitoring of the bridge is achieved, potential problems can be found in time, and the safety of the bridge is improved. The method is advantaged in that bridge performance degradation in the future can be predicted, preventive maintenance is realized, multiple optimized maintenance schemes can be generated, scientific decision is supported, bridge maintenance precision and efficiency are improved, bridge service life prolonging is facilitated, and full life cycle cost reduction is facilitated.

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 present application relates to the technical field of bridge construction equipment, in particular to a bridge foundation pile reinforcing equipment and a reinforcing method for bridge maintenance, comprising a self-adaptive protection piece installed on the outer side of a prefabricated pier, the self-adaptive protection piece comprises an assembled protective cover and a self-adaptive shielding mechanism, the assembled protective cover is provided with a plurality of assembled protective covers, the wall thickness of the assembled protective cover is provided with a thermal insulation layer, the inner wall of the assembled protective cover is further provided with a temperature regulating and heating device and a temperature sensor, and the self-adaptive shielding mechanism comprises a plurality of telescopic shafts, a thermal insulation shielding layer, a sealing mechanism and a stable binding mechanism. The present application can widen the application range and improve the installation quality of the pier.

The invention relates to the technical field of road and bridge maintenance, in particular to enhanced design of a crack repairing process. According to the road and bridge crack repairing technology, multi-source data preprocessing is conducted on scanning data through edge computing equipment, accurate recognition is achieved according to crack width classification marking, corresponding repairing operation is adopted for different types of cracks, for example, fine repairing materials and methods are adopted for small cracks to avoid damage expansion, and the repairing efficiency is improved. Structural reinforcing materials are adopted for wide cracks to enhance the repair strength, diversified crack repair structures are formed to adapt to various crack characteristics, meanwhile, key information is recorded to assist in follow-up maintenance management, and after traffic opening, a quality report is generated through rechecking and detection to evaluate and optimize the repair effect, so that the defect of a single repair process is effectively overcome, and the repair efficiency is improved. And the repairing effect and the structural safety are obviously improved.