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2065 results about "Bridge deck" patented technology
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Bridge deck concrete flatness detection and correction method
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.
Owner:ZCCC INT ENG CO LTD +2
Intermediate diaphragm-free, suspended formwork-free, and negative moment tooth block-free beam bridge and design method thereof
The present invention proposes an intermediate diaphragm-free, suspended formwork-free, and negative moment tooth block-free beam bridge, and a design method thereof. The beam bridge includes prefabricated main girders, a wet joint, lower structures, and pier cap transverse beams above the lower structures. The concrete deck slabs of adjacent prefabricated main girders are connected by the wet joint. The design method of the above beam bridge includes the following steps: S1, initial design of the main girders; S2, calculation of the non-uniform deflection of the main girders and the indirect transverse stress of the deck slabs; S3, calculation of the direct transverse stress of the deck slabs; S4, crack resistance verification of the deck slab; S5, optimization of bridge parameters to reduce the stress on the driving surface; S6, completion of the beam bridge design. The beam bridge and its design method effectively solve the problem that the existing intermediate diaphragm-free beam bridge is prone to longitudinal cracking at the joints, and realize the suspension tension without the wet joint suspended formwork of the deck slab and the negative bending moment tendon, and have better mechanical properties and better economic, environmental and social benefits, which can facilitate the promotion and application of such bridges in various types of highways , railways and municipal engineering.
Owner:CHINA CONSTR FIFTH ENG DIV CORP LTD
Steel structure bridge welding device and method
ActiveCN120587780AWelding/cutting auxillary devicesAuxillary welding devicesGear wheelClassical mechanics
The invention discloses a steel structure bridge welding device and method, and relates to the technical field of steel structure welding, the steel structure bridge welding device comprises a welding main body and a moving assembly for moving the welding device; the hoisting assembly is used for clamping and moving the U-shaped rib plate; the unloading assembly is used for unloading the welded bridge deck steel plate; the pushing assembly is used for pushing the welding device to move; the adjusting assembly is used for adjusting the angle of the welding device. A double-sided toothed plate is pushed through an electric telescopic rod, a telescopic plate is pushed through a linkage gear, the position of a storage box is adjusted, the output end of a welding gun is aligned with the welding face of a U rib and a bridge deck slab, then an electric telescopic frame is started, the joint of the U rib and the outer wall of the bridge deck slab is welded, and the problem that a traditional steel structure bridge welding device is inconvenient to use when used is further solved. And due to the fact that the limitation of a device for welding the U-shaped rib plate and the inner wall of the bridge deck steel plate is large, an additional device is needed for cooperation subsequently, and the problem that the U-shaped rib plate and the surface of the bridge deck steel plate are welded is solved.
Owner:澳能国际新材料科技(广东)有限公司
Intelligent damage monitoring control method and system for steel-UHPC (Ultra High Performance Concrete) combined bridge deck slab
The invention discloses an intelligent damage monitoring control method and system for a steel-UHPC (Ultra High Performance Concrete) combined bridge deck slab. The intelligent damage monitoring control method comprises the following steps: arranging a multi-source sensor in a key stress area of the steel-UHPC combined bridge deck slab; the data acquisition module synchronously acquires multiple physical quantity signals monitored by each sensor; the feature extraction module captures deep correlation characteristics among physical quantities to obtain enhanced feature vectors; the state recognition and prediction module dynamically recognizes the health state of the structure according to the enhanced feature vector and predicts the crack evolution trend; the active control module deduces local pressure stress needing to be applied to active regulation and control of the steel bridge deck slab and the UHPC according to the intelligent identification and evolution prediction result; after regulation and control are executed, the feedback optimization module collects operation data and feedback information of each module, optimizes and adjusts parameters and control strategies of the system, and feeds back the optimized parameters and strategies to each module to form a closed-loop self-adaptive control mechanism; according to the invention, full-life-cycle health management of the steel-UHPC combined bridge deck can be realized.
Owner:HENAN YUXI EXPRESSWAY CO LTD +1
Fiber reinforced concrete for bridge deck pavement and preparation method thereof
The invention discloses fiber reinforced concrete for bridge deck pavement and a preparation method thereof, and belongs to the technical field of concrete. The fiber reinforced concrete is prepared from the following raw materials: Portland cement, modified basalt fiber, a slow-release mineralizer, a stress-oriented dispersing aid and the like. The modified basalt fiber is a basalt fiber which is subjected to amino silanization through a silane coupling agent KH-550 and then is catalytically grafted with ethylenediamine tetraacetic acid and hydroxyethyl methylacrylate through DCC (dicyclohexylcarbodiimide); the slow-release mineralizer comprises calcium sulphoaluminate and silicon-based coated nano calcium sulfate; the silicon-based coated nano calcium sulfate is core-shell structure powder formed by coating a nano calcium sulfate core material with a silicon dioxide shell layer; the concrete is strong in interface bonding, excellent in dynamic fatigue resistance, good in durability and stable in volume, and the problem that the mechanical property, the durability and the dynamic anti-interference capability of the concrete cannot be considered at the same time is solved.
Owner:山西平榆高速公路有限责任公司 +1
Bridge expansion joint abnormity diagnosis method and system based on voiceprint recognition and deep learning
The invention discloses a bridge expansion joint abnormity diagnosis method and system based on voiceprint recognition and deep learning, and the method comprises the steps: arranging sensors on the bridge surface and under the bridge of an expansion joint, and obtaining the video data of a vehicle passing through the expansion joint and the audio data of the vehicle passing through the expansion joint; constructing a vehicle seam crossing discrimination model based on a neural network, inputting the video data of the vehicle passing through the expansion joint into the vehicle seam crossing discrimination model, and detecting a vehicle seam crossing scene; identifying a single vehicle seam crossing event in the vehicle seam crossing scene by adopting a data cleaning algorithm; cutting from the audio data of the expansion joint passing of the vehicle to obtain a bicycle seam passing audio of a time period corresponding to the bicycle seam passing event; extracting a Mel spectrogram of a single-vehicle seam-crossing audio frequency, and carrying out feature coding on the Mel spectrogram to obtain an enhanced Mel spectrogram; and constructing an expansion joint anomaly diagnosis model based on an unsupervised linear self-encoding network, inputting the high-dimensional Mel spectrum feature vector of the enhanced Mel spectrum into the expansion joint anomaly diagnosis model, and identifying the abnormal state of the expansion joint.
Owner:JSTI GRP CO LTD
Intelligent monitoring and early warning method for traffic safety in case of icing of bridge floor
The invention belongs to the technical field of roads and bridges, and discloses a bridge floor icing traffic safety intelligent monitoring and early warning method, which comprises the following steps: S1, bridge floor time-varying temperature multi-source prediction based on thermal environment change; s2, predicting the time-varying friction coefficient of the frozen bridge floor based on the temperature field; s3, icing driving safety prediction based on the friction coefficient and the line condition; and S4, bridge deck icing traffic safety comprehensive speed-limiting intelligent early warning is carried out. The core innovation of the invention lies in a full-chain intelligent early warning system, through a closed-loop process of multi-source temperature prediction, dynamic friction modeling, driving safety evaluation and intelligent speed limit decision, the early warning precision and practicability are significantly improved, and through a technical path of data driven prediction, accurate safety evaluation and intelligent decision output, the early warning precision and practicability are improved. The technical performance, the economic benefit and the social safety are all broken through, and a good solution is provided for road traffic safety in winter.
Owner:SOUTHWEST JIAOTONG UNIV
In-service steel bridge U rib and top plate crack double-face welding repairing method and application thereof
PendingCN120990028ABridge erection/assemblyBridge strengtheningBridge engineeringArchitectural engineering
The invention relates to the technical field of bridge engineering, in particular to an in-service steel bridge U rib and top plate crack double-face welding repairing method and application thereof. The method comprises the steps that the position of a crack is determined, a bridge deck pavement layer above the crack is removed, and the surface of a bridge deck slab in a crack area is cleaned; flattening the bridge deck slab on the two sides of the crack, and fixing the flattened bridge deck slab; u-rib internal welding construction process holes are formed; u rib inner welding reinforcing welding and weld leg increasing welding are carried out in an inner corner area where the U rib with the cracks is connected with the top plate; sealing and repairing the construction process hole; carrying out carbon arc air gouging on the crack above the bridge deck slab, and forming a gouging groove in the bridge deck slab; and polishing and multi-layer and multi-pass welding are carried out on the planed groove. The method is fused with an internal welding technology, is a comprehensive repair scheme with root treatment, double reinforcement, controllable deformation and reliable quality, thoroughly overcomes the technical defects of treatment of symptoms, no treatment of root causes, easy secondary damage, poor reliability and the like in the prior art, and remarkably prolongs the service life and the safety performance of the in-service steel bridge.
Owner:WUHAN LIXIN AUTOMATION TECH CO LTD
Epoxy resin tack coat oil material suitable for steel bridge deck
PendingCN120590899ANon-macromolecular adhesive additivesMacromolecular adhesive additivesEpoxyPolyurethane elastomer
The invention discloses an epoxy resin tack coat oil material suitable for a steel bridge deck, which constructs a multi-scale toughening composite system through the synergistic effect of an epoxy-terminated polyurethane elastomer toughening agent (molecular-scale chemical grafting) and a nano-scale elastomer filler (nano dispersion toughening), and solves the problem of rigidity-flexibility imbalance of the traditional epoxy tack coat oil. The material has the advantages of fast curing (surface drying at 25 DEG C is less than or equal to 4 hours), high toughness (the elongation at break is greater than or equal to 250%) and excellent weather resistance (the performance retention rate is greater than or equal to 85% after ultraviolet aging for 500 hours), and is suitable for interlayer interface bonding of steel bridge deck pit slot and crack repair. According to the preparation method, uniform dispersion and interface chemical bonding of the nanofiller are achieved through a segmented stirring process, the comprehensive performance of the material is remarkably improved, and the important engineering application value is achieved.
Owner:广州肖宁道路工程技术研究事务所有限公司
Bridge deck system multi-subentry project integrated construction process optimization method
The invention discloses a bridge deck system multi-sub-project integrated construction process optimization method. The method comprises the following steps: step 1, optimizing a process based on a BIM (Building Information Modeling); step 2, carrying out combined measurement by adopting GNSS-RTK and laser scanning; 3, bridge deck pavement construction and expansion joint installation are conducted on the basis of the combined measurement result; 4, the paver is linked with the reserved groove for positioning, the flatness error can be effectively controlled, and the bridge deck pavement quality is guaranteed; 5, guardrail modular construction is carried out; sixthly, seamless connection, layered backfilling and dynamic compaction are conducted on the butt strap behind the abutment; 7, whole-process environmental protection and finished product protection; 8, performing three-dimensional scanning comparison; step 9, block chain data archiving; the method has the beneficial effects that construction simulation, sequence adjustment and dynamic monitoring are carried out based on the model optimization process logic, the problems of process crossing and construction period conflict can be recognized and eliminated by simulating the construction process in advance, accurate positioning of each subentry project is ensured, and the overall coordination of construction is improved.
Owner:SHENZHEN ZHONGTIEERJU ENG CO LTD
Low-temperature fatigue crack propagation life prediction method and system based on steel bridge deck
The invention belongs to the technical field of industrial detection, and provides a low-temperature fatigue crack propagation life prediction method and system based on a steel bridge deck, and the method comprises the steps: judging whether the crack direction deflection risk assessment needs to be started or not through the sharp reduction of steel plasticity and the non-uniform analysis of local stress gradient; if yes, the crack direction deflection risk of the steel bridge deck is evaluated by analyzing the grain orientation difference and the strengthening phase of the welding seam and the HAZ area; if the risk is high, a stress gradient gentle area is determined through a weld toe stress gradient cloud picture, a resistance-gradient coupling equation is established according to the minimum resistance principle and in combination with the stress gradient, and a crack deflection path is determined; dividing the crack crossing area according to the crack deflection path, calculating the actual propagation rate of the crack by combining the path proportion and stress gradient distribution of each stress gradient area after division, and correcting the life prediction output result, thereby improving the crack propagation path prediction precision and the fatigue life prediction evaluation precision.
Owner:CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
Unmanned aerial vehicle bridge detection method based on machine vision
The invention discloses an unmanned aerial vehicle bridge detection method based on machine vision. According to the method, an unmanned aerial vehicle is used as an autonomous mobile platform, and full-coverage and high-resolution image data acquisition of structural surfaces such as a bridge deck, a beam body and a bridge pier is realized through systematic task planning. The collected data is processed by a motion recovery structure and a multi-view three-dimensional algorithm to generate a high-precision three-dimensional live-action model and a digital orthophoto map. On the basis, a deep learning target detection algorithm is adopted to perform intelligent analysis on the image, apparent defects such as cracks, spalling and corrosion are automatically identified, positioned and classified, and accurate quantification of parameters such as crack width and spalling area is realized. According to the method, the problems of high risk, low efficiency, high subjectivity, existence of detection blind areas and the like in traditional manual detection are effectively solved, and key technical support is provided for digital and intelligent transformation of bridge operation and maintenance management.
Owner:江西软件职业技术大学 +1
Spatial three-dimensional suspended corridor and optimization method therefor
Disclosed in the present invention is a spatial three-dimensional suspended corridor, comprising a suspended corridor that connects indoor floor passageways, wherein diagrid columns are provided on all edge portions of the indoor floor passageways; the suspended corridor comprises several fixed segments and several bridge deck segments from bottom to top; and the fixed segments or corner segments are all connected to the corresponding bridge deck segments by means of node connecting components. In the present invention, by means of some implementable tests and on the basis of having a preliminary understanding of the stress performance of a corridor structure, a corridor simulation model is also established, parameters of the model are continuously optimized for repeated debugging, preliminary stress performance calculations are then performed and compared with results of some previously conducted tests, and if results are quite similar to the test results, this proves that the model is relatively optimal, that is, an optimized model is obtained, and then this model is used to analyze other more complex performances of the corridor. The optimization objective of the present invention is to make the structure and stress of an aerial corridor safer, more reliable and more comfortable.
Owner:2ND CONSTR CO LTD OF CHINA CONSTR 5TH ENG BUREAU
Cable force abnormity identification method based on bridge floor vibration signal and unsupervised convolution auto-encoder
PendingCN121071720ADesign optimisation/simulationSpecial data processing applicationsData setAlgorithm
The invention provides a bridge floor vibration signal and unsupervised convolution auto-encoder-based cable force anomaly identification method, which comprises the following steps of: constructing a three-dimensional finite element numerical model of a target bridge structure, and generating a multi-working-condition bridge floor vibration signal data set through the three-dimensional finite element numerical model; constructing a convolutional auto-encoder, and training the convolutional auto-encoder through the multi-working-condition bridge floor vibration signal data set; collecting a bridge floor vibration signal during the operation period of the bridge, and inputting the bridge floor vibration signal during the operation period of the bridge into the trained convolution auto-encoder to generate a bridge floor reconstruction signal; calculating damage evaluation indexes of the bridge floor reconstruction signal and the bridge floor vibration signal; and based on the evaluation indexes, generating a two-dimensional clustering diagram, a box diagram, a trend scatter diagram and a three-dimensional clustering diagram, and identifying the abnormal state of the cable force through visual analysis. According to the invention, a new technical path and a new solution are provided for bridge structure safety assessment.
Owner:GUANGDONG UNIV OF TECH
Simple layout method for continuous beam bridge cluster distributed optical fiber deflection monitoring
The invention discloses a simple layout method for distributed optical fiber deflection monitoring of a continuous beam bridge cluster, and the method comprises the steps: laying upper and lower edge strain sensing optical cables on a boundary beam of the continuous beam bridge cluster, only laying the lower edge strain sensing optical cable on a middle beam, and obtaining the deflection of the boundary beam through the upper and lower edge strain monitoring data of the boundary beam; and reconstructing the upper edge strain data of the middle beam by utilizing the upper edge strain data of the boundary beam, and realizing the accurate reconstruction of the deflection of the middle beam by combining the lower edge strain monitoring data of the middle beam through a continuous beam bridge deflection reconstruction method based on data-physical hybrid driving. The method not only solves the problems of large sensor consumption, complex arrangement, high construction cost, poor cluster monitoring economy and the like caused by simultaneous arrangement of optical fibers on the upper edge and the lower edge of each beam in the prior art, but also solves the problems of difficulty in arrangement of sensors and large construction damage caused by bridge deck pavement coverage on the upper edge of the middle beam; and the robustness and the data reconstruction capability of the monitoring system are effectively improved.
Owner:HARBIN INST OF TECH
Foot bridge structure
InactiveCN223723577UClimate change adaptationBridge structural detailsClassical mechanicsBridge deck
A foot bridge structure comprises a plurality of fish skeletons which are mutually spliced and a bridge body which is formed by splicing the fish skeletons, each fish skeleton comprises a main body beam and cross beams, the cross beams are connected to the two sides of the main body beam respectively, the cross beams are symmetrically arranged relative to the central axis of the main body beam, and a height difference exists between the top of the main body beam and the cross beams. The waterproof liquid is accumulated at the connecting position of the main body beam and the cross beam, so that the connecting position of the main body beam and the cross beam is prevented from being rusted, a bridge floor bottom plate is laid on the fish skeleton, the top of the fish skeleton is wrapped through the bridge floor bottom plate, namely, the bridge floor bottom plate is laid on the upper end faces of the main body beam and the cross beam, and therefore the liquid is stored on the bridge floor bottom plate. The liquid is further prevented from being in contact with the main body beams and the cross beams, so that the main body beams and the cross beams are prevented from being rusted, a bridge deck slab is arranged on the bridge deck bottom plate, and guardrails are arranged on the two sides of the bridge deck slab.
Owner:ZHEJIANG COMM CONSTR GRP CO LTD
Bridge floor global driving wind environment early warning method, system and equipment based on limited measuring points and storage medium
The invention discloses a bridge floor global driving wind environment early warning method, system and device based on limited measuring points and a storage medium, and relates to the technical field of wind speed early warning and artificial intelligence. Future short-time wind speed is predicted based on wind speed time history data, and a two-dimensional high-temporal-spatial-resolution prediction flow field of multiple planes is obtained according to the future short-time wind speed; main beam global wind-induced vibration response data are obtained based on the wind-induced vibration response data; obtaining three-dimensional high-temporal-spatial-resolution prediction flow field data according to the two-dimensional high-temporal-spatial-resolution prediction flow field and the girder global wind vibration response data; analyzing the three-dimensional high-temporal-spatial-resolution prediction flow field data to obtain a safe driving critical wind speed, and setting a wind speed-vehicle speed limiting criterion; and when the predicted wind environment exceeds the wind speed limit criterion, outputting the predicted data and the early warning level of the corresponding driving wind environment, and carrying out advanced early warning. According to the invention, the problem of low accuracy of existing driving safety early warning is solved, and wind speed multi-stage early warning for different vehicles in different driving environments is realized.
Owner:CHONGQING JIAOTONG UNIV +1
Suspension bridge deck steel beam cable hoisting equipment
The invention relates to the technical field of bridge engineering construction, and particularly discloses suspension bridge deck steel beam cable hoisting equipment which comprises a sports car, a hoisting tool and a hoisting cable, the hoisting tool is used for being connected with a steel beam, the sports car is installed on a bearing cable and can move on the bearing cable, the hoisting tool is connected with the sports car through the hoisting cable, a pulley seat is arranged on the hoisting cable, and a connecting seat is arranged on the hoisting tool. The pulley seat and the connecting seat are hinged through a pin shaft to form four lifting points, the hoisting cable is connected with the hoisting winch, the pin shaft is provided with a pin shaft type force sensor used for measuring the cable force of the hoisting cable, cable force data are detected and transmitted to a control center, and a Beidou positioning terminal is arranged near the lifting points. In the hoisting process, coordinate data of the hoisting points are collected in real time and transmitted to the control center, the control center processes the cable force data and the coordinate data of the hoisting points and controls the hoisting winches to work according to the processing result, the actions of all the hoisting winches are adjusted to enable the steel beam to be kept balanced, and stable and safe construction is guaranteed.
Owner:GUIZHOU ROAD & BRIDGE GRP
Epoxy resin batching device for steel bridge deck pavement and adding process of epoxy resin batching device
The invention relates to the technical field of epoxy asphalt batching equipment, discloses an epoxy resin batching device for steel bridge deck pavement and an adding process thereof, solves the technical problems in the prior art, and comprises a storage tank, a metering and weighing system, a conveying system and a central control system, the storage tank comprises a first storage tank A and a second storage tank B; the metering and weighing system comprises a first metering pump a, a second metering pump b and a metering hopper; the conveying system is installed between the metering hopper and a mixing cylinder of a mixing plant and used for providing power to feed and add a mixture in the metering hopper into the mixing cylinder. The conveying system comprises a pneumatic control valve, a conveying pump, a gas-liquid mixer, an electromagnetic valve and a compressed air source. And the central control system is used for controlling the operation of the batching device and controlling the completion of the circulation control period. According to the technical scheme, the novel epoxy resin adding equipment is developed and used for circularly batching, the batching proportion is automatically formed, and the working efficiency is high.
Owner:NANTONG ROAD & BRIDGE ENG CO LTD
FEBD seamless bridge deck connecting plate adopting T-shaped shear nail structure
The utility model relates to an FEBD seamless bridge deck connecting plate adopting a T-shaped shear nail structure, which comprises a semi-continuous UHPC bridge deck connecting plate arranged on the upper side of a telescopic gap at a beam end in a crossing manner, and a polyurethane pavement layer used for bearing vehicle load is paved on the upper side of the semi-continuous UHPC bridge deck connecting plate. T-shaped shear nails are arranged between the polyurethane pavement layer and the semi-continuous UHPC bridge floor connecting plate. According to the connecting plate, the seamless bridge floor can be realized, and the diseases such as pavement layer disengagement and hemming caused by large deformation difference when wheels pass through the expansion joint are obviously relieved; and in addition, the complex space stress state of the bridge deck can be better adapted, the normal use requirement of the bridge deck continuous structure is met, the construction period is effectively shortened, and the influence on traffic is small.
Owner:FUZHOU UNIV
Real-time residual life prediction method based on crack image information
The invention relates to the technical field of bridge engineering detection and life evaluation, and discloses a bridge deck residual fatigue life prediction method and system based on real-time image information. The objective of the invention is to solve the problems of low subjective efficiency, time-consuming numerical simulation, low automation and intelligence level and poor generalization ability of the existing in-service bridge RC deck residual fatigue life evaluation means. According to the scheme, an evaluation system including image acquisition, physical simulation data set generation, deep learning evaluation model and result output is constructed; generating a bridge deck crack image-residual fatigue life pairing data set covering mirror symmetry and extreme crack modes by using a high-fidelity physical simulation platform, and training an end-to-end deep convolutional neural network regression model; a bridge floor image is collected on site and preprocessed, the residual fatigue life is directly output by an input model, and finally a visual evaluation report is generated.
Owner:TSINGHUA UNIVERSITY +3
Integral dismantling method for hanging basket formwork of rigid frame bridge
The invention discloses an integral dismantling method for a rigid frame bridge hanging basket formwork, and relates to the technical field of bridge engineering construction. The problems that in the prior art, the rigid frame bridge hanging basket formwork dismantling efficiency is low, potential safety hazards are high, and cost is high are solved. The dismantling method comprises the following steps of: pre-burying a winch anchor bolt to anchor a winch; loosening a hanging basket anchor system to separate a hanging basket bottom die from a concrete box girder; arranging four winches to be matched with fixed pulleys; synchronously lifting the hanging basket bottom die for static load test, then synchronously lowering the hanging basket bottom die to the ground, and decomposing and dismantling the hanging basket bottom die on the ground. And the hanging basket truss is disassembled on the bridge floor. The integral dismantling method for the hanging basket formwork of the rigid frame bridge is used for dismantling the hanging basket bottom formwork of the rigid frame bridge, an integral dismantling mode is adopted, high-altitude split operation of the hanging basket bottom formwork is converted into integral ground dismantling, the operation time is shortened, and the dismantling efficiency is improved; the template loss is reduced, and the cost is reduced; aloft work is reduced, and potential safety hazards are reduced. The method is particularly suitable for large-span bridge engineering crossing rivers and seas or expressways.
Owner:19TH METALLURGICAL (CHONGQING) CONSTR ENG CO LTD +1
Stepless side formwork system for multi-size bridge deck slabs and self-adaptive control method of stepless side formwork system
The invention discloses a non-stage-difference side mode system of a multi-size bridge deck slab and a self-adaptive control method of the non-stage-difference side mode system. The non-stage-difference side mode system comprises an electromagnetic locking bottom mode, a non-stage-difference side mode, an Internet of Things module, a data transmission module, a computer vision module, an intelligent decision-making module and an electromagnetic control module. Through electromagnetic induction matching between the electromagnetic locking bottom die and the step-free side die, traction, positioning and locking of the side die are achieved, so that bridge decks of multiple sizes are adapted in a step-free mode, and the flexibility of template adjustment, the production efficiency and the installation precision are improved; the self-adaptive control method comprises the steps of appearance judgment of the non-stage-difference side formwork, non-stage-difference in-place of the side formwork, electromagnetic locking of the side formwork, judgment and control of the concrete forming stage and dismantling of the non-stage-difference side formwork. Electromagnetic attraction force or electromagnetic repulsive force needed during traction, in-position and locking of the side die is determined through the neural network technology, and then the current direction and current intensity applied to all the electromagnetic induction coils are determined.
Owner:THE FIRST ENGINEERING COMPANY OF CCCC FOURTH HARBOUR ENGINEERING CO LTD +2
Multi-agent system for generating trestle design model under driving of large model
The invention discloses a multi-agent system for generating a trestle design model under the drive of a large model, and relates to the technical field of BIM and AI crossing. The working process of the system comprises the steps that after a user inputs an instruction, the system automatically verifies parameters such as span combination and bridge floor total length, and the number of steel pipe piles is deduced through bridge pier rank calculation; the architect agent adopts a hierarchical layout algorithm and completes component coordinate derivation in combination with a default table; a programmer agent generates modeling codes according to a priority rule, and the problems of parameter missing, family library mismatching and the like are solved through an error self-correction strategy. The system integrates a long-term / short-term memory mechanism, realizes design parameter tracing and modeling process closed-loop optimization, and remarkably improves the design efficiency and modeling automation level of a complex trestle structure.
Owner:CCCC FIRST HIGHWAY XIAMEN ENGINEERING CO LTD +1
Rapid erection device and construction method for bridge flood damage beam and slab
Owner:ROAD & BRIDGE INT CO LTD +1
Bridge deck pavement high-precision elevation control construction method based on three-dimensional laser paving
The invention relates to the field of bridge deck pavement, and discloses a bridge deck pavement high-precision elevation control construction method based on three-dimensional laser paving, which comprises the following steps: carrying out mechanical scabbling treatment on the top surface of a beam slab, and cleaning the scabbled surface; setting elevation points on a bridge floor, and performing survey lofting; angle steel and square steel combined positioning clamping grooves are adopted, and the distance between steel bars and the thickness of a protective layer are controlled; a truss type protective layer thickness detection device is used for detecting the thickness of a protective layer within the full-width range of the bridge floor in real time; a three-dimensional laser paver is adopted for concrete paving, and the paving thickness, gradient and flatness are accurately controlled through laser and ultrasonic sensors; a truss type polishing machine is used for mechanical surface finishing; and covering a maintenance material. By means of mechanical scabbling, encrypted measurement lofting, the combined angle steel-square steel positioning clamping groove and the truss type real-time detection device, full-process intelligent construction is achieved in combination with the three-dimensional laser paver, and the problems of steel bar positioning deviation, insufficient flatness and the like in a traditional technology are solved.
Owner:THE FIRST ENG CO LTD OF CTCE GRP +2
Structural health monitoring method based on multi-parameter integrated sensor
The invention discloses a structure health monitoring method based on a multi-parameter integrated sensor, relates to the technical field of bridge structure health monitoring, and solves the problems that in the prior art, bridge structure health detection is not comprehensive, and bridge structure response is separated from the actual use state. The method comprises the steps that a comparison bridge similar to a target bridge is matched according to bridge type data, bridge index data of the comparison bridge are analyzed, and a priority monitoring sequence of the target bridge is obtained through analysis; obtaining the maximum allowable load of the target bridge, and detecting the structural health condition of the target bridge according to the first priority monitoring target; analyzing the use condition of the target bridge according to the real-time monitoring data and the second priority monitoring target; the damage condition of the corresponding bridge floor of the target bridge is analyzed according to the bridge index data, whether the target bridge has the passing condition or not is judged, mutual hooking of the bridge structure and the use state is achieved, and then comprehensive detection of the bridge structure is achieved.
Owner:JIANGSU QIANYI IOT TECHNOLOGY CO LTD
Fiber asphalt flexible anti-crack seal layer parameter type selection and design method
A fiber asphalt flexible anti-crack seal parameter type selection and design method comprises the following steps: S1, establishing a strength prediction model: combining feature design and a support vector machine algorithm, and constructing nonlinear coupling features of asphalt consumption, fiber consumption and fiber length to obtain a strength prediction model; training the support vector regression model to obtain a prediction model of the tensile strength of the bridge deck waterproof layer under different material combinations; s2, establishing a waterproof performance theoretical model of the waterproof layer: obtaining a function relationship among the equivalent stress length of the waterproof layer, the thickness of the waterproof layer and the tensile strength based on a cracking principle of the waterproof layer and stress balance of the waterproof layer, obtaining a theoretical model of the critical crack width Wt of the waterproof layer and a waterproof performance correlation coefficient of the waterproof layer combined by different materials; and S3, designing the waterproof layer of the bridge deck slab: selecting a material combination of the waterproof layer with the optimal economical efficiency based on the crack width of the bridge deck slab in combination with the prediction model of the tensile strength of the waterproof layer of the bridge deck slab and the waterproof performance theoretical model of the cracked waterproof layer of the bridge deck slab.
Owner:CHINA CONSTR FIFTH ENG DIV CORP LTD