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74674 results about "Civil engineering" patented technology

Civil engineering is a professional engineering discipline that deals with the design, construction, and maintenance of the physical and naturally built environment, including public works such as roads, bridges, canals, dams, airports, sewerage systems, pipelines, structural components of buildings, and railways.

Pile foundation state real-time monitoring and diagnosis system based on digital twinborn technology

The invention relates to the technical field of pile foundation monitoring, and discloses a pile foundation state real-time monitoring and diagnosis system based on a digital twinborn technology. The system comprises a multi-source data acquisition module, a data confidence evaluation module and an acoustic emission monitoring decision module. The multi-source data acquisition module comprises a plurality of sensor groups deployed at different depths of a pile foundation, each group comprises a strain sensor, an acceleration sensor, an acoustic emission sensor and a temperature sensor, and pile foundation data can be acquired in multiple dimensions; the data confidence evaluation module receives original data, generates a correction data sequence through time sequence noise separation and reconstruction, and calculates data confidence according to correction data distribution dispersion; the acoustic emission monitoring decision module judges whether acoustic emission monitoring is started or not according to the data confidence coefficient, and controls the acoustic emission sensor array at the top of the pile foundation to collect acoustic emission signals during starting. The system can comprehensively obtain pile foundation data, improve data accuracy, achieve early damage recognition and guarantee pile foundation safety.
Owner:BINZHOU BOHENG ENG MANAGEMENT SERVICE CO LTD

Method and system for estimating vertical bearing capacity of steel pipe pile

The invention provides a method and system for estimating the vertical bearing capacity of a steel pipe pile, and relates to the technical field of pile foundation engineering.The method comprises the steps that a static cone penetration test is conducted on a seabed stratum needing to be arranged for a steel pipe pile foundation, experimental data are obtained and subjected to normalization processing, soil behavior types are divided, and soil layer mechanical parameters are inverted; calculating side friction resistance and end resistance of the steel pipe pile based on the soil layer mechanical parameters to obtain initial static ultimate bearing capacity; historical equivalent cyclic load experimental data of waves in the construction sea area are obtained, an equivalent cyclic load reduction coefficient, a liquefaction reduction coefficient and a time-varying corrosion reduction coefficient are constructed, and a comprehensive time-varying reduction coefficient is constructed; the initial static ultimate bearing capacity is corrected based on the comprehensive time-varying reduction coefficient, the vertical bearing capacity of the steel pipe pile in the long-term service period is predicted, and the time-varying ultimate bearing capacity is obtained; setting an evaluation threshold according to the time-varying ultimate bearing capacity, dynamically adjusting a bearing capacity grading threshold interval, and outputting a bearing capacity grading evaluation result.
Owner:CCCC THIRD HARBOR ENGINEERING CO LTD

Crack-chloride ion double-triggering type subsea tunnel corrosion-resistant concrete and preparation method thereof

The invention discloses crack-chloride ion double-triggered subsea tunnel corrosion-resistant concrete and a preparation method thereof, and relates to the field of subsea tunnel engineering materials. The concrete is prepared from the following components in parts by weight: 400 to 500 parts of Portland cement, 50 to 80 parts of fly ash, 60 to 100 parts of superfine mineral powder, 1000 to 1100 parts of coarse aggregate, 700 to 800 parts of fine aggregate, 140 to 160 parts of water, 10 to 20 parts of self-repairing microcapsules and 1 to 5 parts of a water reducing agent, the self-repairing microcapsule comprises a capsule wall material, a self-repairing material and a layered dihydroxyl composite metal oxide. A crack-chloride ion double-response system is constructed, and the limitation of traditional single trigger repair is broken through. When a crack with a certain width appears in the concrete, the capsule wall of the self-repairing microcapsule is broken to release the repairing component, so that effective filling of the crack is realized; and meanwhile, the layered double-metal hydroxide can directionally adsorb chloride ions to form a stable compound, so that the migration rate of the chloride ions is remarkably reduced.
Owner:RAILWAY CONSTR RES INST OF CHINA ACAD OF RAILWAY SCI CO LTD +2

Self-adaptive control method and system for cement mixing pile

The invention relates to the technical field of engineering construction control, in particular to a self-adaptive control method and system for a cement mixing pile, and the method comprises the steps: setting the slurry preparation ratio parameter of a slurry preparation barrel of a feeding hopper according to the working information of the cement mixing pile, and conveying the prepared slurry to a slurry storage barrel of a discharging hopper; collecting a slurry static pressure signal of a slurry storage barrel of the blanking hopper, and monitoring the load dynamic characteristics of a stirring motor of the blanking hopper in real time in the stirring process; the slurry spraying quality parameters of the slurry are analyzed, and when the slurry spraying quality parameters reach the preset feeding standard, the slurry is conveyed to a slurry spraying pipeline to be matched with a cement mixing pile for pile forming work; when the guniting quality parameter exceeds the interval of the feeding standard, a real-time matching error is obtained; and generating a ratio correction instruction to correct the pulping ratio parameters. According to the invention, the dynamic closed-loop control of the pile forming quality of the cement mixing pile under the complex geological condition is effectively realized, and the industry bottleneck that the traditional open-loop proportioning system cannot respond to the slurry state change in real time is broken through.
Owner:JIANGSU JIEDA TRAFFIC ENG GRP CO LTD

Ultra-high performance concrete and preparation method thereof

The invention discloses ultra-high performance concrete and a preparation method thereof. The ultra-high performance concrete comprises the following components in percentage by mass: 15%-25% of cement, 3%-6% of nano SiO2, 30%-35% of fly ash or steel slag powder, 35%-40% of recycled aggregate, 1%-4% of fiber, 0.5% of a microbial remediation agent and 1%-3% of nano TiO2. The preparation method comprises the following steps: S1, pretreating the recycled aggregate; and S2, packaging the microbial remediation agent: mixing the bacillus pasteurii spores with calcium lactate, and wrapping the mixture in calcium phosphate microspheres. S3, step-by-step stirring; S3.1, dry mixing: uniformly stirring the cement, the fly ash, the nano SiO2, the nano TiO2 and the recycled aggregate; s3.2, wet mixing is carried out, water solution fibers containing the polycarboxylic acid water reducing agent are added, uniform stirring is carried out, and the water-binder ratio of the water solution containing the polycarboxylic acid water reducing agent is 0.18; s3.3, final mixing: adding the packaged microbial remediation agent, and uniformly stirring; and S4, directional curing: performing steam curing at 80 DEG C for 48 hours, performing ultraviolet irradiation, and performing constant-temperature and constant-humidity curing for 7 days. The ultra-high performance concrete has the effects of low cost, low carbon emission, multi-function integration and repeatable crack self-repairing.
Owner:NINGBO OFFSHORE INTELLIGENT OPERATION & MAINTENANCE TECHNOLOGY CO LTD

Construction method of prefabricated multi-ribbed cavity floor

The invention provides a construction method of a prefabricated multi-ribbed cavity floor, and belongs to the technical field of prefabricated multi-ribbed plate construction. The construction method of the prefabricated multi-ribbed cavity floor comprises the steps of full-hall scaffold building, main keel laying, overall leveling and the like. The construction method comprises the steps that S1, full-hall scaffold building is conducted, specifically, when a full-hall scaffold is built, vertical rods on the upper layer and the lower layer are required to be aligned, the vertical rods are uniformly arranged from the two sides of a cast-in-place ribbed beam, the vertical rods are arranged at the intersection positions of floor elastic bidirectional lines, and scaffold boards are laid under the vertical rods; S2, main keels are laid, specifically, when the main keels are installed, the main keels are required to be arranged in order and not to be inclined, and the two vertical rods at the intersection positions must abut against the main keels; and S3, overall leveling is conducted, specifically, after the main keels are laid, overall leveling is conducted according to control lines, and full-hall scaffold formworks are hoisted on the main keels. The cavity formworks are supported by placing the modularized cavity formworks which are machined and formed in a factory-like mode, and accurate and rapid installation of an upper plate of the prefabricated multi-ribbed plate is achieved by installing limiting square pipes.
Owner:CHINA CONSTR EIGHTH BUREAU DEV & CONSTR CO LTD

Grating dam safety evaluation and design method and structure based on debris flow blocking degree

The invention discloses a grating dam safety evaluation and design method and structure based on debris flow blocking degree. Wherein the safety assessment method comprises the following steps: S100, calculating the safety of the debris flow on the basis of the solid matter concentration of a debris flow susceptible area, the particle size value corresponding to the accumulated content of 95% in a full particle size grading curve, the channel average gradient, the channel average width and the primary debris flow scale in the section range of the grating dam, the minimum particle size value of the maximum boulder in the drainage basin and the opening width of the grating dam; calculating a critical blocking judgment coefficient according to the correlation value of the height of the grating dam, the angle of the wedge-shaped structure and 60 degrees and the correlation value of the total amount of debris flow solid substances and the reservoir capacity of the wedge-shaped beam type grating dam; and S200, evaluating the safety of the grating dam based on the critical blocking discrimination coefficient. The evaluation and design method and structure incorporate the relative relation between the debris flow scale and the dam body storage capacity, meanwhile, the influence on active structure parameters such as wedge-shaped flow guide is quantified, and the blocking state prediction accuracy of the grating dam in actual operation is improved to a certain degree.
Owner:INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI

Tunnel deformation early warning method and system based on digital twinning and data monitoring

The invention provides a tunnel deformation early warning method and system based on digital twinborn and data monitoring, and belongs to the technical field of computer data simulation.The method comprises the steps that firstly, entity rock stratum dynamic monitoring data, real-time construction disturbance data and initial digital twinborn model configuration parameters of a tunnel construction area are obtained; and then virtual-real dynamic coupling and feedback iteration processing is carried out on the virtual-real dynamic coupling model to generate an initial virtual-real coupling digital twinborn model, the initial virtual-real coupling digital twinborn model is iteratively optimized based on real-time construction disturbance data to obtain a final virtual-real coupling digital twinborn model, and deduction of the rock stratum deformation linkage effect is carried out according to the final virtual-real coupling digital twinborn model. The method comprises the following steps: generating a rock stratum deformation linkage path set, performing risk linkage mode identification on the rock stratum deformation linkage path set, determining a tunnel rock stratum large deformation risk linkage mode, and finally generating construction early warning information including a risk linkage diffusion area, a risk linkage evolution period and an emergency response priority according to the risk linkage mode, and transmitting the construction early warning information to a tunnel construction management system. And the tunnel construction safety is effectively guaranteed.
Owner:中国水利水电第七工程局有限公司

Intelligent asphalt pavement rolling control method and system

The invention relates to the field of highway construction, in particular to an intelligent asphalt pavement rolling control method and system, and the method comprises the steps: deploying machine vision equipment to collect an image of a just-paved asphalt mixture, recognizing the segregation degree in combination with a convolutional neural network, and generating a segregation distribution thermodynamic diagram with geographic coordinates; the road roller is integrated with a positioning sensor, a temperature sensor, a vibration sensor and a speed sensor, relevant parameters are collected, and the real-time compaction degree is calculated. The thermodynamic diagram and the compaction degree are subjected to space-time matching, optimal operation parameters are calculated through a dynamic coupling model on the basis of data such as the segregation degree and the temperature of a target area, the optimal operation parameters are wirelessly sent to a road roller control system to adjust speed and vibration parameters, and a road roller feeds back the new compaction degree after execution to form closed-loop control. The problem that separation and compaction control are disjointed in the prior art is solved, separation information and the compaction process are deeply fused, and underpressure of a separation area and overpressure of a uniform area are avoided.
Owner:HANDAN HENGZHI ROAD BUILDING CO LTD

Urban subway network toughness pre-disaster and post-disaster dual-stage optimization method under flood disaster

The invention provides an urban subway network toughness pre-disaster and post-disaster dual-stage optimization method under flood disasters. The method comprises the following steps: acquiring urban subway network information, road network information and flood disaster information; constructing an urban subway topology network and a road topology network; simulating flood depth space-time change in the subway and road network during the duration of the flood disaster, and determining a subway network failure station set based on the accumulated water depth; calculating flood control resource demand quantity based on the platform number, the platform type and the flood depth of each station in the failure station set; establishing and solving a pre-disaster-post-disaster dual-stage optimization model of urban subway network toughness to obtain an optimal pre-disaster site closing decision, an optimal flood control resource warehouse site selection decision and an optimal post-disaster restoration decision; wherein the double-stage optimization model is a double-layer planning model; and the upper-layer model and the lower-layer model are mutually coupled and optimized through a pre-disaster closing site set and a post-disaster repairing process.
Owner:FUZHOU UNIV

Method and system for predicting lumpiness of open-air throwing blasting

The invention discloses a method and a system for predicting the lumpiness of open-air throwing blasting, and relates to the technical field of rock blasting engineering. The invention discloses a new calculation relation about a lumpiness similarity proportion, relates to the technical field of open-air loose blasting mining, and can predict blasting lumpiness of projects such as mines, tunnels and the like by scaling a lumpiness distribution proportion. The method comprises the following steps: firstly, acquiring a rock sample from a blasting site, measuring parameters such as rock density and fracture toughness, and acquiring blasting parameter information of a to-be-blasted area; and then, a numerical simulation model under an open-air throwing blasting similar material is constructed by using a numerical simulation method, the change rule of blasting fragmentation lumpiness along with explosive unit consumption in a scale model test is studied, and the blasting lumpiness in a field blasting area is predicted according to the blasting lumpiness similarity ratio. According to the method, the change rule along with the unit consumption of the explosive is analyzed, the utilization rate of crushing energy of the explosive in surface blasting engineering is improved, reference is provided for blasting lumpiness control, and prediction of field blasting lumpiness before blasting is achieved.
Owner:KUNMING UNIV OF SCI & TECH

Method for simulating and analyzing water inrush catastrophe in tunnel construction based on peridynamics and techniques for optimizing tunnel construction

A design method for preventing and controlling water inrush catastrophe in tunnels and techniques for optimizing actual tunnel construction, specifically: discretizing calculation model into material points, setting virtual boundary layers outside boundary of calculation model; selecting size of horizon of material points to form neighborhood matrix of material points; making crustal stress equivalent to stress boundary condition, making karst cave water pressure equivalent to normal pressure, and converting displacement constraint and tunnel support into displacement boundary conditions; solving speed and displacement of material point, determining whether bonds of all material points meet failure condition, recording local damage situations; after initial balance calculation is stable, simulating tunnel construction process by using material point dormancy method; and according to physical values of optimization parameters of actual tunnel construction obtained by simulation results that meet the requirements of water inrush catastrophe prevention and control, implementing the optimized actual tunnel construction.
Owner:SHANDONG UNIV

Tunnel hard rock non-blasting excavation method

InactiveCN113586076AReduce the number of drilled holesOvercoming the blast effectTunnelsDrill holeEnvironmental geology
The invention provides a tunnel hard rock non-blasting excavation method. The tunnel hard rock non-blasting excavation method can realize efficient excavation of complete or relatively complete hard rock without adopting large excavation equipment such as a heading machine and the like , and is characterized by comprising the following steps of 1, drilling contour holes along a tunnel face contour line so as to determine a tunnel excavation range, and determining each drilling and grooving position according to the excavation range, then, forming and drilling a plurality of cavity expanding holes in the position close to the positions; 2, drilling a plurality of rows of guide holes between the contour holes and the cavity expanding holes; 3, drilling groove forming holes which are meshed and overlapped with each other at the determined drilling and grooving positions, and finally forming a groove cavity; 4, enabling the cavity expanding holes near the groove cavity to be subjected to impact crushing, and therefore expanding excavation is conducted on the groove cavity; 5, according to a certain excavation sequence, starting from the guide holes close to the expanded and excavated groove cavity, adopting a hydraulic breaking hammer for conducting impact breaking on the guide holes, so that excavation of the rock mass of a main body part is completed; and 6, conducting impact crushing on the contour holes.
Owner:WUHAN UNIV

Cushions including buckling columns with a plurality of buckling points

A cushion includes interconnected walls that define an array of buckling columns. Each buckling column of the array of buckling columns includes a plurality of buckling points at different elevations along a height of the buckling column. The buckling points buckle under different loads. Methods of designing cushions with a plurality of buckling points are also disclosed.
Owner:PURPLE INNOVATION LLC

Real-time prediction method for three-dimensional stress field in deep tunnel excavation physical simulation test

The invention provides a deep tunnel excavation physical simulation test three-dimensional stress field real-time prediction method, and relates to the technical field of tunnel engineering. Comprising two stages of model construction and training and model use. In the model construction and training stage, a physical constraint reference model is constructed, and training optimization is completed; and in the model use stage, real-time prediction of a stress field of a deep engineering physical simulation test is realized through the trained and optimized model. The method has breakthrough advantages in the aspects of physical law constraint, real-time monitoring data fusion, training loss stability, boundary stress condition accuracy and the like, and is a high-reliability three-dimensional stress field prediction method oriented to a deep complex environment.
Owner:NORTHEASTERN UNIV CHINA

Intelligent bracelet earthquake early warning service system and method

The invention discloses a smart bracelet earthquake early warning service system and method, and the method comprises the steps: collecting user physiological parameters and earthquake early warning signals, building a coupling relation between earthquake intensity parameters and user physiological features, and forming an individualized disaster bearing reference; performing gravity sensing detection in combination with the geographic position of the user and the anti-seismic grade of the building, analyzing the spatial relationship between the micro-inclination angle of the building and the position of the user, and generating gravity field risk features; analyzing a group movement mode through relative position changes among multiple bracelets, extracting movement coordination characteristics and direction coordination coefficients, and forming a displacement coordination early warning sequence; a disaster emergency coefficient is generated based on user motion coordination efficiency and protection response behaviors, a sound wave positioning network of a multi-device linkage trigger area is constructed, collaborative alarm and personalized evacuation guidance are realized, differentiated earthquake early warning services can be provided according to individual physiological features and environmental conditions, and the pertinence and effectiveness of early warning are improved.
Owner:FUZHOU BENYANG INFORMATION TECH CO LTD

Intelligent analysis method and system for stability of tunnel surrounding rock in tunnel excavation

The invention relates to the technical field of tunnel construction safety, in particular to an intelligent analysis method and system for tunnel surrounding rock stability in tunnel excavation. The method comprises the following steps: acquiring geological data of surrounding rock of a tunnel, and performing tunnel excavation simulation to obtain tunnel excavation data; joint fissure detection is conducted on the basis of the tunnel excavation data, and joint fissure data are obtained; performing stress disturbance analysis according to the tunnel excavation data to obtain stress disturbance data; identifying a tunnel instability area according to the stress disturbance data; surrounding rock convergence displacement detection is conducted on the tunnel instability area, and surrounding rock convergence displacement data are generated; and predicting the surrounding rock falling probability based on the surrounding rock convergence displacement data. According to the method, the stable state of the surrounding rock is dynamically and accurately judged on the basis of a tunnel construction safety technology, so that the accuracy and timeliness of tunnel surrounding rock instability risk identification and early warning are remarkably improved.
Owner:POWER CHINA KUNMING ENG CORP LTD

Temperature monitoring and stress monitoring method and system for fan foundation

The invention relates to the technical field of construction monitoring, in particular to a temperature monitoring and stress monitoring method and system for a fan foundation. The method comprises the following steps: collecting concrete hydration heat release monitoring signals, performing temperature gradient distribution excavation and finite element numerical simulation, and constructing a concrete pouring process temperature evolution model; concrete surface temperature monitoring parameters are obtained, multi-time-point surface layer temperature calculation is carried out, table environment temperature fluctuation mapping is carried out on the concrete pouring process temperature evolution model, and a real-time area temperature twinborn model is constructed; strain state sensing parameters in the concrete pouring process are identified, multi-scale spectral decomposition is carried out, then temperature strain signal stripping is carried out, and pure mechanical strain component characteristics are obtained; and performing internal micro-pore structure analysis based on pure mechanical strain component characteristics to generate a concrete situation prediction result. The intelligent level of the whole fan foundation construction stage is improved, and the fan construction efficiency and safety are improved.
Owner:INNER MONGOLIA JINGNENGCHA YOUHOUQI NEW ENERGY CO LTD +1

Foldable structure and method

Described is a system, method and apparatus for stowing and deploying a roof of a structure in order to transport the structure on municipal streets and highways. An upper portion of a structure comprises two gable walls that are foldable inward, on top of a first floor of the structure. The roof is formed from two independent roof panels that are coupled to each other by a main roofline hinge. Each roof panel is allowed to slide and rotate as the roof is being stowed. When fully stowed, the height of the structure is drastically reduced. Additionally, one or more end structures may be constructed adjacent to a main structure, each end structure capable of being rotated onto one side in order to reduce its height.
Owner:KUSHNER ALEXANDER

Seamless construction method and system for ultra-long reinforced concrete structure

The invention provides a seamless construction method and system for an ultra-long reinforced concrete structure, and relates to the technical field of concrete structure construction.The method comprises the steps that the length of the ultra-long reinforced concrete structure is judged, and when the one-way length of the structure is larger than a preset seamless control length threshold value, a target structure area is recognized; structural shrinkage deformation and temperature deformation analysis is carried out, and a target expansion reinforcing band is determined; determining a target concrete mix proportion decision; and after shrinkage-compensating concrete is poured, the construction state of each construction section is monitored in real time, the mixing amount of the expanding agent and the pouring sequence are fed back and adjusted, and seamless continuous construction is completed by alternately pouring internal and external concrete. The technical problems that in the prior art, post-cast strip construction is generally adopted and can only be carried out after initial concrete shrinkage is basically stable, the whole construction period is remarkably prolonged, the influence of external factors is likely to happen, and the construction period is further delayed are solved.
Owner:CCCC FOURTH HIGHWAY ENG CO LTD

High-precision building surveying and mapping method and system

The invention relates to the technical field of building surveying and mapping, in particular to a high-precision building surveying and mapping method and system, and the method comprises the steps: collecting a point cloud model and an image of a to-be-surveyed building, segmenting the point cloud model into point cloud regions, obtaining the difference coefficient of each point cloud region, recognizing each building region, and removing the point cloud data outside the building region. Performing hole filling on the removed point cloud model; obtaining each structural surface of each building area, obtaining discrete coefficients of each boundary point and each non-boundary point of each structural surface, and screening each noise suspected point from all the non-boundary points of each structural surface; and obtaining a reliability coefficient and a point cloud distortion coefficient of each building area, performing denoising processing on the point cloud data of each building area, and obtaining a three-dimensional model of the to-be-mapped building. According to the method, the denoising precision of the point cloud data is improved, the precision of the three-dimensional model is improved, and therefore more accurate and more visual data support is provided for subsequent building surveying and mapping and project cost evaluation.
Owner:HENGSHUI YETONG CONSTR ENG CO LTD

Offshore wind turbine pile group structure suitable for complex geology and installation method of offshore wind turbine pile group structure

The invention relates to the technical field of offshore wind power foundation engineering, in particular to an offshore wind turbine pile group structure suitable for complex geology and a mounting method of the offshore wind turbine pile group structure. The offshore wind turbine pile group structure suitable for the complex geology comprises guide assemblies and a pile group system frame, wherein each guide assembly is composed of a steel pipe pile guide sleeve, a jacket guide sleeve and a connecting ring plate, and the pile group system frame integrates the multiple guide assemblies through a connecting frame. The modular overall pile group structure design is achieved through the pile group system frame integrating the multiple guide assemblies and the connecting frame, the fan load is dispersed to the multiple pile foundations through the pile group synergistic effect, and therefore the bearing capacity of the whole foundation is improved, the foundation can adapt to different seabed geological conditions, and the construction efficiency is improved. The development requirement of offshore wind power in a complex environment is met, efficient installation, high bearing capacity and geological adaptability optimization of the offshore wind turbine foundation are achieved, stable support is provided for an offshore wind turbine generator, the construction cost is reduced, and the construction efficiency is improved.
Owner:LONGYUAN (BEIJING) WIND POWER ENG & CONSULTING CO LTD

Road and bridge construction concrete detection equipment

The invention discloses road and bridge construction concrete detection equipment, and relates to the field of concrete detection.The road and bridge construction concrete detection equipment comprises a sample seat and a movable pressing plate, vertical plates are fixed to the two sides of the upper surface of the sample seat, top plates are fixed to the top ends of the two vertical plates, and a limiting groove used for placing a concrete block is formed in the center of the upper surface of the sample seat; the pressing plate is located above the limiting groove, a groove is formed in the center of the upper surface of the pressing plate, a liquid storage cylinder is fixed in the groove, and liquid penetrating holes are formed in the positions, located in the groove, of the lower surface of the pressing plate and the bottom end of the liquid storage cylinder; a pressure applying assembly and two transmission assemblies are arranged above the liquid storage cylinder, the two transmission assemblies are symmetrically arranged on the pressure applying assembly, and inner chain wheel teeth are arranged on spokes corresponding to the two rope winding rollers respectively. And the stress environment of the road and bridge concrete in real service is restored, and the comprehensiveness and reliability of detection data are improved.
Owner:SICHUAN XINRONG ROAD & BRIDGE TECHNOLOGY CO LTD

Partitioned rapid inversion method for global structural mechanical parameters of concrete arch dam

The invention discloses a concrete arch dam global structural mechanical parameter zoning rapid inversion method, and relates to the technical field of dam operation safety monitoring and management, and the method comprises the steps: building a dam body and foundation three-dimensional finite element model through finite element software according to engineering design and monitoring data, and building a foundation three-dimensional finite element model according to damming material mechanical parameter information; partitioning the three-dimensional finite element model, analyzing the sensitivity of mechanical parameters of each region, determining sensitive mechanical parameters influencing the deformation of the concrete arch dam, and carrying out self-adaptive intelligent sampling on the sensitive mechanical parameters according to a sensitivity analysis result, and constructing a deep learning agent model reflecting a nonlinear relationship between the sensitive mechanical parameters of the dam and the deformation of each monitoring point, and carrying out deep learning inversion on the elastic modulus of the dam body and the deformation modulus of the bedrock. According to the invention, the method can efficiently and accurately invert and determine the structural mechanical parameters of the arch dam in the actual operation period, and provides a good basis for the safety analysis of the dam.
Owner:NANCHANG UNIV

Bathtub splash guard (SG01)

1. Name of the product in this design: Bathtub baffle (SG01). 2. Purpose of this design: To prevent water from splashing out of the bathtub and to place items. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.
Owner:DONGGUAN YUANTUO TECH CO LTD

Shield tunnel connection channel portal construction method based on mechanical excavation

The invention discloses a shield tunnel connection channel portal construction method based on mechanical excavation, and relates to the technical field of shield tunnel connection channel construction, and the shield tunnel connection channel portal construction method comprises the steps that a steel sleeve is installed at a connection channel portal, and portal sealing is achieved; a glass fiber reinforced concrete pipe piece is pre-buried in the opening of the connection channel, and based on the multi-stage construction strategy, the pipe jacking machine entering and exiting construction task is executed in sequence; prefabricated jacking pipe joints are adopted for channel tunneling and splicing, the size parameters of the jacking pipe joints meet the fireproof evacuation function requirement, and the jacking pipe joints are spliced in a staggered joint mode without wedge-shaped quantity; steel jacking pipe joints are arranged at the head end and the tail end of the connecting channel, and arc-shaped steel plates are pre-buried; and in the T-joint section where the transverse channel and the main tunnel intersect, an arc-shaped steel plate is adopted for welding a tunnel portal connector, and an emergency grouting pipe is arranged on the arc-shaped steel plate, so that end-dividing grouting reinforcement is achieved. Reference is provided for shield tunnel connection channel mechanical method portal construction, the structural strength of a holing area is effectively improved, and the operation stability is improved.
Owner:CHINA UNIV OF MINING & TECH +1

Building sealant stretching performance testing device

The invention relates to the technical field of tensile tests, and discloses a building sealant stretching performance test device, which comprises a test box, a first clamp, a loading block, a linear driver and a driving mechanism, a door plate is mounted on the front of the test box; the first clamp is installed at the top in the test box, the loading block is arranged in the test box, located below the first clamp and driven by the linear driver to move up and down, a through loading channel is formed in the loading block, and a cylinder is arranged in the loading channel and driven by the driving mechanism to rotate; a through assembly channel is formed in the cylinder body, and a transversely-arranged guide rail body is installed in the assembly channel. According to the invention, by carrying out stretching, torsion, inclined stretching, tearing stretching, winding stretching and testing in a low-pressure environment on the sealant, the mechanical properties of the sealant under complex working conditions can be comprehensively evaluated, the testing precision and reliability are improved, the actual engineering requirements are met, and meanwhile, the testing safety and environmental protection property are ensured.
Owner:HUBEI TONGCHENG HIGH-TECH MATERIALS CO LTD +2

Intelligent monitoring method and system for bearing performance of offshore wind power pile foundation

The invention discloses an intelligent monitoring method and system for the bearing performance of an offshore wind power pile foundation, and relates to the technical field of offshore wind power pile foundation monitoring, and the intelligent monitoring method comprises two main parts of pile foundation horizontal displacement calculation and early warning and fan structure frequency calculation and early warning. Pile foundation performance degradation induced by scouring is considered, a model algorithm considering the influence of scouring on pile foundation bearing performance and fan structure frequency calculation is established, dynamic prediction and trend analysis are conducted on offshore fan structure performance, and full-chain closed-loop management from data collection and real-time processing to decision output is formed. Therefore, by the adoption of the intelligent monitoring method and system for the bearing performance of the offshore wind power pile foundation, the technical defects that the offshore wind power pile foundation is difficult to monitor, evaluate and early warn are systematically overcome through a logic closed loop of multi-dimensional monitoring, high-precision analysis and intelligent early warning.
Owner:WENZHOU UNIV +1