6461 results about "Reinforced concrete" patented technology

The present invention relates to a basalt fiber reinforced concrete, which includes: a cement slurry with a water-to-cement ratio between 0.3 and 0.5, and a slurry volume percentage between 15-25%; an aggregate with an aggregate volume percentage between 65% and 75%; a basalt fiber reinforcement with a fiber volume percentage between 0.2% and 1.00%; and a concrete admixture used to adjust the properties of the basalt fiber reinforced concrete.

Disclosed in the present invention is a construction process of an offshore bridge high-rise pile platform. A cofferdam of a steel-concrete structure is used for construction. The cofferdam consists of a cofferdam bottom plate prefabricated by means of reinforced concrete and a steel side formwork. The construction process comprises the following stages: a preparation stage, a cofferdam mounting stage, a cofferdam lowering stage, a cofferdam bottom plate blocking and water pumping stage, and a platform concrete pouring stage. The preparation stage comprises the following steps: pile foundation casing sinking, cast-in-place pile construction, pile foundation casing pile head trimming, cofferdam bottom plate and skirt plate prefabrication, and steel side formwork manufacturing. The cofferdam mounting stage comprises: first, mounting the cofferdam bottom plate, and then mounting the steel side formwork, wherein the cofferdam bottom plate is mounted by means of suspension hangers, and each suspension hanger comprises a pile cap, an inverted hanging beam, and two first finish-rolled twisted steel bars. The cofferdam lowering stage comprises mounting a jack lowering system on the cofferdam bottom plate, wherein the cofferdam lowering system comprises I-shaped hangers, carrying pole beams, center hole jacks, and steel strands. The construction process of the present invention can greatly reduce the construction difficulty and can improve the construction efficiency.

The invention discloses a shear capacity analysis method for a reinforced concrete beam with stirrups based on machine learning, and the method comprises the steps: constructing a training set and a test set based on a shear capacity database of the beam with stirrups; establishing an interpretable prediction model by utilizing machine learning, setting hyper-parameters for the interpretable prediction model, and performing training; obtaining a shear bearing capacity prediction value of the samples in the test set by using the trained prediction model; and quantifying the contribution of each key anti-shearing characteristic to the anti-shearing bearing capacity predicted value, and analyzing and judging the reasonability of the anti-shearing bearing capacity predicted value output by the prediction model according to the anti-shearing theory. According to the method, the problems of high prediction difficulty, high discreteness, lack of reliable physical models, large calculation amount of high-precision numerical simulation and the like in machine learning are solved for the first time; the prediction model can accurately reflect the complex nonlinear relation between the shear bearing capacity and the influence factors, and meanwhile, the model reasonability is verified and improved in combination with a prediction result and priori knowledge, so that the man-machine interaction trust in practical application is improved.

The invention provides a rusted reinforced concrete crack detection method and device based on YOLOV11, and belongs to the technical field of image processing. The method comprises the following steps: acquiring crack image data of a corroded reinforced concrete member, and marking the image data; combining the labeled image data with labels to form a data set; constructing a YOLOV11 cross-view comparison model, wherein the model comprises a backbone network, a neck network and a head network; the YOLOV11 cross-view comparison model is trained, and an optimal model is obtained; and acquiring crack video data of a to-be-detected rusted reinforced concrete member, inputting the crack video data into the DVTFVS module for image stabilization processing, transmitting a video into the YOLOV11 cross-view comparison model for crack detection, and outputting position, size and category information of the crack. According to the invention, the efficiency and the accuracy of corrosion reinforced concrete crack detection are ensured.

The invention provides a single pile bearing capacity prediction method based on an XGBoost machine learning algorithm, comprising the following steps: (1) acquiring and preprocessing test data including soil layer input parameters, pile parameters and construction parameters, and dividing the preprocessed test data into a test set and a training set; (2) constructing a machine learning model in a pile foundation design stage according to the soil layer input parameters and the pile parameters, constructing a machine learning model in a pile foundation construction stage according to the soil layer input parameters, the pile parameters and the construction parameters, and respectively optimizing the two machine learning models by adopting a Bayesian optimization algorithm; and (3) the two optimized machine learning models are used for calculating the single-pile bearing capacity in the pile foundation design stage and the single-pile bearing capacity in the construction stage according to needs. According to the method, influence factors of all stages are comprehensively considered, algorithm learning is carried out on the influence factors, the bearing capacity of the reinforced concrete prefabricated pipe pile can be rapidly and effectively predicted, and the method can be used for optimizing the pile length design, reducing the pile material cost and improving the construction quality.

The invention relates to equipment and a method for water-guided laser collaborative forcible entry of a reinforced concrete pile head based on artificial intelligence recognition, and belongs to the technical field of forcible entry equipment. Comprising a mobile chassis; the rack is mounted on the movable chassis; the water jet system is mounted on the rack and is provided with a first working part; the mechanical drill bit system is mounted on the rack and is provided with a second working part; the identifying and positioning module is used for collecting real-time data of a three-dimensional structure, steel bar distribution and a forcible entry area of the pile head; and the control unit is in communication connection with the identifying and positioning module, the water jet system and the mechanical drill bit system, and the control unit receives data of the identifying and positioning module to generate a forcible entry strategy and a mechanical drill bit path plan so as to guide the first working part and the second working part to cooperatively work. The technical problems that in the prior art, impact force of water jet forcible entry is limited, and the forcible entry efficiency of a hard core layer and a complex forcible entry environment is not high are solved.

The invention relates to the technical field of engineering formwork trolleys, in particular to an integral box culvert electric formwork moving trolley and a construction method of the integral box culvert electric formwork moving trolley. The internal mold system is arranged in the box culvert and used for supporting and protecting the box culvert from the interior of the box culvert; the outer mold system is arranged outside the box culvert; the box culvert is supported and protected from the outside of the box culvert. The inner mold system comprises an inner mold trolley support, an inner mold walking mechanism, an inner mold plate and an inner mold fixing mechanism, the inner mold walking mechanism is used for driving the inner mold trolley support to do translational motion in the box culvert, the inner mold trolley support is used for supporting the inner mold fixing mechanism and the inner mold plate, and the inner mold fixing mechanism is used for fixing the inner mold plate to the inner wall of the box culvert; the trolley is provided with a top side formwork supporting system, the erecting procedure and time of a formwork support in a box chamber in traditional cast-in-place construction are optimized, the trolley is driven by a walking motor, the on-site assembling and disassembling time is shortened, and the box culvert construction period is shortened by 20%.

The invention is suitable for the technical field of engineering monitoring, and provides a dynamic monitoring and evaluation platform based on digital twinborn engineering quality, which comprises a twinborn model construction module used for constructing a preliminary digital twinborn model based on material attribute parameters of reinforced concrete and performing virtual entity mapping of the reinforced concrete; the environment working condition simulation module is used for integrating a dynamic environment field in the digital twin model and simulating different loading paths, constraint conditions and multi-field coupling; the physical data monitoring module is used for carrying out strain monitoring and crack detection on the reinforcing steel bars based on a sensor and carrying out internal monitoring and surface detection on concrete; and the twinborn model optimization module is used for correcting and optimizing the digital twinborn model on the basis of comparing the physical monitoring data with the output data of the digital twinborn model. The physical monitoring data and the digital twinborn model are combined, the states of the reinforced concrete structure under various working conditions can be accurately reflected in real time, and potential quality problems can be found in time.

The invention discloses an old wind power plant fan foundation small-to-large capacity increasing structure and a transformation construction method. The old wind power plant fan foundation small-to-large capacity increasing structure comprises an original fan foundation, a newly-poured reinforced concrete foundation, a vertical anchor bolt cage connecting system and a radial anchor bolt connecting system. The connecting structure of the bottom section of the new fan tower drum and the new fan foundation comprises a vertical anchor bolt cage connecting system and a radial anchor bolt connecting system. The vertical anchor bolt cage connecting system is fixed in the original fan foundation, and the radial anchor bolt connecting system is fixed in the newly-poured reinforced concrete foundation. According to the new fan foundation, the diameter of the middle pier is expanded so as to arrange a new tower tube, the height of the middle pier is not changed, the height of the middle pier of the newly-poured foundation almost does not need to be increased, and the using amount of concrete is greatly reduced. Meanwhile, according to the structure, an original vertical anchor bolt cage connecting system is reserved, a radial anchor bolt connecting system is adopted for enhancing connection between the bottom section of the fresh air fan tower barrel and the fan foundation, the transformation cost and the connection reliability are effectively controlled, and the maximization of reutilization of the original fan foundation and the controllability of the cost of the fresh air fan foundation are achieved.

The invention provides a power transmission and transformation project reinforced concrete corrosivity evaluation method and system, and relates to the technical field of civil engineering durability evaluation.The method comprises the steps that temperature data of a project location and the total volume, the water content and the pore volume of reinforced concrete are collected, and a freeze-thaw failure index formula is constructed; the product type is judged according to the measured sulfate concentration, different sulfate erosion index formulas are constructed in combination with related data, and the magnesium ion concentration is independently considered in the marine environment; constructing a chlorine salt erosion index formula according to the chloride ion concentration; extracting data from the research report to construct a carbonization erosion index formula; and giving a weight to each erosion type to establish a comprehensive corrosivity evaluation index formula, and judging the erosion degree according to a result. By means of the method, various erosion factors can be comprehensively considered, the erosion degree can be effectively judged according to the evaluation result, and a key basis and scientific guidance are provided for durability guarantee, protective measure making and maintenance decision making of the reinforced concrete structure of the power transmission and transformation project.

The invention provides a building structure anti-seismic toughness evaluation method based on triple integration, which comprises the following steps: selecting a proper seismic oscillation record, carrying out finite element modeling on a reinforced concrete structure, and carrying out nonlinear time-history analysis on a finite element model of the structure under the action of an earthquake to obtain damage data of the structure; establishing a probability demand model of the structure based on the obtained structure damage data, obtaining posterior distribution of model parameters based on a Bayesian updating principle, and further calculating to obtain a vulnerability strip of the structure; calculating a direct economic loss strip of the structure based on the obtained vulnerability strip, calculating repair time of the structure under the continuous earthquake action based on the obtained structure damage data, and obtaining probability distribution of the repair time; a multi-integral mathematical idea is introduced, vulnerability and discreteness of repair time are considered, a traditional anti-seismic toughness calculation formula is expanded to triple integration, an anti-seismic toughness calculation formula based on the triple integration is obtained, and the anti-seismic toughness median value and interval of the reinforced concrete structure are obtained through calculation.

The invention discloses a hydropower station diversion tunnel longitudinal crack depth detection method, which comprises the following steps: arranging ultrasonic measuring points above and below a diversion tunnel longitudinal crack to obtain a reinforced concrete sound velocity representative value; arranging ultrasonic measuring points within the length range of the crack; performing ultrasonic detection, and judging the depth of the crack through ultrasonic waves; adjusting the position of the ultrasonic measuring point according to the depth of the fracture until the ultrasonic shape is in a suitable state; and calculating the depth of each detection point of the longitudinal crack. According to the technical scheme, by means of the method for detecting the longitudinal crack depth of the reinforced concrete in the diversion tunnel of the hydropower station through the ultrasonic waves, crack depth detection and calculation of the circular tunnel are completed, and in order to judge the development condition and the stability state of the crack, the crack depth can be regularly detected in the overhaul period of a hydropower station generator set; therefore, monitoring of longitudinal crack expansion and extension is realized.

The invention discloses a steel reinforced concrete member full-period management method based on industrial big data. The method comprises the steps that a member model is established through BIM modeling software, an easily-buckling area is screened in combination with finite element buckling analysis, a buckling monitoring point is arranged on the surface of an analysis plate body, and a plate body monitoring point is arranged on the splicing edge; extracting model coordinate data to generate processing parameters, and guiding plate cutting and monitoring point position marking; actual coordinates of all monitoring point positions in the profile steel component are obtained through laser scanning and compared with model coordinates, and reworking is triggered if errors exceed the limit; constructing a neural network model, inputting various parameters related to analysis of plate body buckling to obtain a predicted buckling monitoring point out-of-plane displacement value, and judging compliance; according to the method, the problems of low efficiency, error accumulation and lack of full-period closed-loop management of a traditional method are solved, the machining precision and the structural safety of the steel reinforced concrete member are remarkably improved, and the hardware cost and the detection time consumption are reduced.

The invention belongs to the technical field of underground gas storage, and particularly relates to a long-term efficient hydrogen storage composite lining structure for an underground rock cavern and a preparation method of the long-term efficient hydrogen storage composite lining structure. The long-term efficient hydrogen storage composite lining structure for the underground rock cavern comprises surrounding rock and an internal composite structure of the surrounding rock. The surrounding rock reinforcing layer is formed by pressure pre-grouting in surrounding rock and can resist tensile stress transmitted to the surrounding rock by internal air pressure and enhance air tightness; the permeable layer is arranged on the inner side of the surrounding rock reinforcing layer and can discharge underground water to prevent hydrostatic pressure from causing extrusion deformation damage to the concrete bearing layer during construction and causing instability of the sealing steel lining; the reinforced concrete bearing layer is arranged on the inner side of the permeable layer and the outer side of the slip layer, and micro self-healing capsules capable of repairing cracks and enhancing sealing performance are evenly added in the injection molding process; the anti-drag sliding layer is arranged between the steel lining and the bearing layer and inhibits shear damage of the sealing steel lining to the bearing layer under high internal pressure; the steel lining sealing layer is arranged on the inner side of the sliding layer to bear part of gas load and seal gas.

The invention discloses a press-in type open caisson construction method based on an automatic control system. The automatic control system comprises a data acquisition module, a data analysis and decision module and an execution control module. The data acquisition module is used for collecting data in the sinking process of the open caisson in real time, the data analysis and decision module analyzes the collected data in real time and generates a control instruction, and the execution control module regulates and controls the pressure sinking equipment and the soil sampling equipment according to the control instruction; the construction method comprises the following steps: constructing a ground anchor pile; isolation pile construction; construction of the open caisson: surveying and setting out, excavating a foundation pit, laying a sand cushion layer, laying a concrete cushion layer, constructing a brick moulding bed, erecting a scaffold, erecting a template, binding reinforcing steel bars and pouring concrete; pressing and sinking the open caisson; according to the method, an automatic control system is adopted, various parameters in the open caisson construction process can be monitored and adjusted in real time, uniform sinking of the open caisson is achieved through accurate control over the parameters, and the construction precision and quality are improved.

The invention relates to a high-head concrete lining tunnel bearing ratio numerical method based on a seepage stress cracking model. According to the method, discrete element calculation and analysis are adopted, a three-dimensional geological discrete element unit grid model of the high-head tunnel is established, mechanical calculation is carried out by utilizing a three-dimensional breaking strength criterion, a seepage stress cracking model is established to carry out pore crack seepage stress coupling analysis, and surrounding rock damage and deformation control double indexes for controlling the lining application time are put forward. A local and overall bearing ratio calculation formula of the lining and the surrounding rock is established, and the overall and local bearing sharing ratio of the reinforced concrete lining and the surrounding rock in the water filling process, the stress and strain of steel bars in the lining and the cracking degree of lining cracks are calculated; according to the seepage stress cracking model and the discrete element numerical method thereof provided by the invention, a simulation result better conforms to an actual working condition, and the spatio-temporal evolution law of lining and surrounding rock joint to non-joint bearing (overall bearing ratio and local bearing ratio) in the gradual hydraulic coupling cracking process of the concrete lining is reasonably quantified.

The invention relates to the technical field of traffic infrastructure maintenance, and particularly discloses a method for evaluating the anti-collision toughness of a rusted steel bar bridge structure after ship collision, and the method comprises the following steps: firstly, building a rusted bridge pier finite element model based on a rusted steel bar concrete theoretical degradation model; simulating ship collision by adopting an equivalent static method, and determining dynamic damage factors of the ship; structural nonlinear static analysis and nonlinear dynamic analysis are conducted by considering sudden external force to obtain a bridge function loss function, and then a bridge function is calculated; constructing a response surface agent model to perform dynamic response prediction; determining a bridge structure damage state judgment criterion; the vulnerability of the rusted bridge is calculated through Monte Carlo simulation; and according to the bridge function loss function, combining the repair time and the recovery function to calculate a structure anti-collision toughness index. The method provided by the invention fills up the blank of ship collision resistance toughness evaluation of the coastal rusted bridge pier, provides a scientific basis for bridge safety evaluation and maintenance decision, and is of great significance for guaranteeing safe operation of the bridge.

The invention provides a bridge pier nonlinear earthquake random response analysis method based on a BWBN model, and belongs to the field of civil engineering structure random vibration analys.The method comprises the steps that discretization processing is conducted on a concrete bridge pier structure, and a finite element nonlinear analysis numerical model is constructed; constructing a BWBN model by combining linear and nonlinear differential equations, setting a hysteresis parameter value of the BWBN model, simulating by adopting an Euler-Bernoulli beam unit, and establishing a degraded beam finite element model; obtaining a unit hysteresis vector, constructing a system motion balance equation, solving an equivalent linearization coefficient, constructing a covariance matrix of random response of the concrete pier structure, performing random response analysis on the concrete pier structure, and exploring typical working conditions of random excitation. According to the method, the operation time is shortened, the calculation precision is improved, and meanwhile, the response characteristics of the reinforced concrete pier structure under nonlinear earthquake random excitation can be truly represented.

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.

The invention discloses a prefabricated reinforced concrete shear wall, and relates to the technical field of constructional engineering, the prefabricated reinforced concrete shear wall comprises a shear wall body, a sleeve main body, a wallboard, a steel bar main body and a pouring hole, the bottom of the sleeve main body is provided with a grouting cavity, and the center of the interior of the grouting cavity is provided with a moving disc. According to the prefabricated reinforced concrete shear wall, in the assembly process of the shear wall body, air in the vent groove is extruded through ascending of the movable disc, so that the positioning clamping rings move synchronously and are attached to the steel bars, the assembly precision and stability are improved, and the installation accuracy is ensured. During grouting and pouring, slurry fills and extrudes the supporting blocks, connection between the movable disc and the movable plate is relieved, the second through holes are formed, clamping of the steel bars by the positioning clamping rings is automatically relieved, stress concentration is avoided, and the structural safety is improved. And meanwhile, the movable plate moves downwards to touch the trigger block, and under the cooperation of the connecting plate and the spring, the connecting plate continuously vibrates to remove bubbles after pouring is completed, so that the bubble amount of slurry is reduced, and the structural compactness and durability of the shear wall are enhanced.

The invention relates to the technical field of steel reinforced concrete vibration testing, and discloses a method and system for testing the vibration performance of a steel reinforced concrete frame structure, and the state of the steel reinforced concrete frame structure is judged through vibration amplitude and frequency changes under the conditions of different excitation modes, measurement point positions, sampling frequencies, collection durations and the like. By accurately measuring and analyzing the change of the damping ratio, potential damage or performance change of the structure can be found in time, and a powerful basis is provided for safety assessment and maintenance of the structure; the signal is decomposed and analyzed based on Hilbert-Huang transform, the internal composition and the change rule of the structure vibration signal can be analyzed more finely, and the method has advantages for identifying weak vibration characteristics and early damage signs of the structure in a complex stress state, so that the test structure can be evaluated in time in the early damage stage, and the test accuracy is improved. And therefore, coping treatment can be conveniently carried out.

The invention relates to a reinforced concrete structure model construction method and device and a medium. The method comprises the steps that a first finite element model is established according to geometric parameters of a bridge basic structure; obtaining a material constitutive relation of the bridge structure according to a reinforced concrete structure tensile experiment; determining a first crack width calculation formula based on section model construction of the fiber beam column unit; embedding the material constitutive relation and a first crack width calculation formula into a first finite element model; inputting a structural load effect, and obtaining a structural performance degradation parameter and a structural crack parameter by using the first finite element model; according to the invention, the technology of more accurate reinforced concrete structure simulation based on the fiber beam column unit is realized, and the technical problem of difficult reinforcement crack simulation in the reinforced concrete structure is solved.

The invention discloses a method for establishing a microcosmic finite element model of a reinforced fiber concrete structure, and belongs to the technical field of concrete microcosmic model.The method comprises the steps that an MATLAB language is combined with ANSYS / LS-DYNA finite element software for analog simulation to obtain a four-phase finite element model of the reinforced concrete structure, and according to the method, reinforcing steel bars meeting requirements are arranged in a preset area; aggregate and fiber are put in the putting area, it is ensured that the aggregate, the fiber and the steel bars do not invade one another, modeling is conducted on a large number of fibers, accurate modeling is conducted on the directionally-arranged steel bars, the aggregate with different particle sizes is put into the modeling system, and the defect that the aggregate, the steel bars and the aggregate invade one another is overcome; the simulation model is very close to a real concrete structure, the model generation time is short, and the model precision is high.

The invention relates to the technical field of water conservancy and municipal administration, in particular to a reinforcement calculation method for a non-rod system reinforced concrete structure, which comprises the following steps: replacing long and thin pile and rod structures with one-dimensional units, replacing pier, wall, plate and beam structures with two-dimensional units, and carrying out coupling connection on a whole hydraulic structure model; original three-dimensional entity unit finite element calculation is equivalently converted into one-dimensional line unit, two-dimensional plate unit and three-dimensional entity unit coupling structure finite element calculation; displacement, internal force and stress of all parts of the hydraulic structure are obtained, and structural reinforcement is conducted through the internal force according to a structural mechanics method adopted by the rod system reinforced concrete structure. Compared with the prior art, the method has the advantages that the internal force of each part of the building can be directly obtained, the structure stress can be truly reflected, the structure reinforcement mode and number can be optimized, and the original complicated non-rod-system reinforced concrete structure can be subjected to structure reinforcement according to a structural mechanics method adopted by the rod-system reinforced concrete structure.

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.

The invention discloses a mixed tower wind turbine generator FRP-concrete-steel combined tower drum and a construction method.The tower drum comprises a steel tower section and a mixed tower section, the steel tower section is installed on the upper portion of the mixed tower section, the mixed tower section is composed of a plurality of tower drum sections which are sequentially connected from top to bottom, and each tower drum section is formed by combining a plurality of arc-shaped tower drum ring pieces in a surrounding mode; the tower drum ring pieces in the same tower drum section are fixedly connected, vertical joints between the vertically adjacent tower drum sections are installed in a staggered mode, and each tower drum ring piece comprises a reinforced concrete main body part, an inner steel pipe part and a CFRP cloth wrapping section arranged on the outer side of the reinforced concrete main body part. And the reinforced concrete main body parts and the inner steel pipe parts of the upper and lower adjacent tower drum sections are respectively connected, so that the adjacent tower drum sections are mutually fixed. The compressive strength and ductility of the wind power tower cylinder concrete can be improved, larger deformation is generated before the structure is damaged, more energy is absorbed, brittle failure is avoided, complex steel bar configuration is avoided, and the construction difficulty is reduced.

The utility model discloses a heat-preservation and energy-saving building column foundation heat-preservation joint which comprises an embedded part, a steel column and a high-strength heat-preservation cushion block. The embedded part comprises a positioning plate and a column foot anchor bolt and is embedded in the positioning plate when a reinforced concrete structural plate is poured, a higher part of the column foot anchor bolt is exposed according to the elevation of a steel column foot bottom plate, a high-strength heat preservation cushion block is arranged on the upper portion of the positioning plate, a hole is reserved in the position, corresponding to the column foot anchor bolt, of the high-strength heat preservation cushion block, and the column foot anchor bolt penetrates through the hole. A steel column base bottom plate penetrates through a column base anchor bolt to fall on the high-strength heat preservation cushion block and is firmly connected with the column base anchor bolt through a nut, a steel cover plate is arranged on the periphery of the steel column, the steel cover plate and the ground surface layer are located on the same horizontal plane, and the space between the steel cover plate and the steel column base bottom plate is filled with foaming polyurethane. On the premise that the structure bearing requirement is met, cold (heat) breaking is conducted on the column foundation part, a heat preservation surface layer does not need to be additionally adopted to wrap a building inner structure column (steel column), the size of the built building inner structure column is appropriate, and building space does not need to be additionally occupied.

The invention discloses a reinforced concrete arch bridge steel arch hoisting device and a using method thereof.The reinforced concrete arch bridge steel arch hoisting device comprises a fixing base, an adjusting motor is installed in the upper end of the fixing base, a gear is arranged on an output shaft of the adjusting motor, a fluted disc is connected to one side of the gear, and a bearing disc is fixed to the fluted disc; a counterweight groove is formed in one side wall of the bearing disc, an electromagnet of an L-shaped structure is arranged on the inner wall of the counterweight groove, multiple sets of counterweight blocks are arranged below the counterweight groove and distributed along the rotating path of the bearing disc, a bearing plate is arranged below the counterweight blocks, and an electric push rod is fixed to the bottom end of the bearing plate. The device has the beneficial effects that the proper balancing weight can be selected according to the weight of hoisted goods, the load weight is reduced on the premise that hoisting safety is guaranteed, the device is prevented from running at high power all the time, the energy consumption of the device is reduced, and the use performance is high.

Disclosed in the present invention is an aerial manipulator system for measuring the depth of cracks in the substructure of a reinforced concrete bridge, the system comprising a main human-computer interface device, an aerial manipulator, and an end effector, wherein the main human-computer interface device comprises a remote controller and a control computer; the aerial manipulator comprises a drone and a single-degree-of-freedom robotic arm; and the end effector comprises an ultrasonic crack depth measurement mechanism, a shock absorber and a force sensor. In the present invention, the aerial manipulator system is designed to be able to stably contact the substructure of a reinforced concrete bridge and automatically complete crack depth measurement procedures, thereby reducing the high-altitude operation risk and workload of bridge inspectors, and improving the efficiency of crack depth measurement operations.

The invention discloses a wind power assembly type reinforced concrete tower tube assembly construction method, an assembly type reinforced concrete tower tube comprises a concrete tower splicing ring piece, a concrete tower full-circle ring piece and a steel tower conversion section, and the tower tube comprises the spliced ring piece, the full-circle ring piece and the steel tower conversion section from bottom to top; the construction method comprises the process of assembling the fabricated reinforced concrete tower drum through concrete tower piece splicing construction, concrete tower drum and steel tower conversion section hoisting construction and concrete tower drum prestress construction. According to the construction method, assembly and assembly of the concrete tower drum are completed through crawler crane line production, the fan foundation, the concrete tower drum and the steel conversion section are connected through concrete tower drum outer cable unbonded prestress construction, and the construction period is remarkably shortened. In addition, by optimizing the construction process, rapid installation of the prefabricated shell ring is achieved, the construction progress is accelerated, and meanwhile the construction cost is reduced.