382results about How to "Improve construction accuracy" patented technology

The invention relates to the technical field of building engineering, and discloses a building robot space positioning method based on a BIM model, which comprises the following steps: S1, establishing the BIM model of a building, and in the construction process, integrating real-time sensor data of a building site, and dynamically updating the BIM model to reflect the real-time state of a construction environment; and S2, setting multiple reference points at the construction site, performing coordinate calibration on the reference points by using a total station or a GPS system, aligning a coordinate system of the BIM model with a coordinate system of an actual construction site, and matching a building structure in the BIM model with a building structure in an actual environment through the reference points. Through the fusion of detailed building geometric information and real-time sensor data in the BIM model, the system can realize high-precision space positioning, the pose of the robot is corrected in real time by using an extended Kalman filtering algorithm and a multi-source data fusion technology, and the operation efficiency and the construction precision are effectively improved.

The invention discloses a communication pipeline laying system for an underground intelligent pipe gallery, and relates to the technical field of underground intelligent pipe gallery construction, and the system comprises the steps: collecting point cloud data and underground environment parameters through a laser radar and a sensor, and carrying out the synchronous processing; fusing the synchronously processed point cloud data and the underground environment parameters, and constructing a three-dimensional geographic information model; analyzing and planning the three-dimensional geographic model by using artificial intelligence, and optimizing a laying path to obtain an optimal laying path; according to the optimal laying path, automatic pipeline laying is conducted through automatic construction equipment; according to the method, the three-dimensional geographic model is analyzed and planned through artificial intelligence, the laying path is optimized, the optimal laying path is obtained, the risk area under the complex geological condition is effectively avoided, the construction cost is reduced, and the reliability of communication pipeline laying path planning is improved.

The invention discloses a special-shaped steel structure curtain wall construction method based on BIM + three-dimensional scanning, and belongs to the field of building construction, and the construction method comprises the following specific steps: I, carrying out three-dimensional laser scanning on a special-shaped steel structure main body; iI, post-processing scanning point cloud data; iII, reversely establishing a special-shaped steel structure entity model by using the processed point cloud data; iV, performing comparative analysis on the point cloud model of the main body structure and the BIM model; the method can solve the problem of poor installation effect caused by certain deviation between the traditional curtain wall production and installation and an on-site main body, can carry out scanning modeling on a building main body of a special-shaped steel structure, can carry out precision comparison with an original design drawing, and can import model data into a total station to realize automatic lofting; and meanwhile, the construction precision and the construction efficiency are remarkably improved, the reworking problem caused by inaccurate installation is effectively avoided, and therefore the engineering quality is improved.

The invention discloses a double-row steel sheet pile and soil core combined cofferdam structure and a construction method. The double-row steel sheet pile and soil core combined cofferdam structure comprises double-row pile connecting units, steel sheet piles, brackets, steel enclosing purlins, dredger fill and drainage plates. Each double-row pile connecting unit is formed by welding an upper connecting plate between two connecting steel sheet piles; the double-row pile connecting units are inserted into a soil body, and a steel sheet pile is inserted between every two double-row pile connecting units; corbels are welded to the outer sides of the steel sheet piles, steel enclosing purlins are arranged on the corbels, and the steel enclosing purlins, the steel sheet piles and the corbels are connected in a welded mode; dredger fill is filled between the two rows of steel sheet piles and is compacted by a hammer-attached soil squeezer; a drainage plate is inserted into the dredger fill; earth excavation is conducted on the side, close to water, of the double-row pile cofferdam to form a foundation pit; when shallow excavation is conducted on the foundation pit, no sand filling pipe bag is arranged; when the foundation pit is deeply excavated, a slope section is reserved; sand filling pipe bags are arranged on the outer side of the slope section and stacked on the outer side of the slope section in a staggered mode. The hammer-attached soil squeezing device comprises an attached hammer, a pressing plate, water permeable holes, geotechnical cloth and a brush.

The invention discloses a wireless monitoring system for real-time deformation of a negative ring segment during shield tunnel starting tunneling, which comprises a standard block, an adjacent block and a top sealing block which are mounted on the negative ring segment, and a data acquisition system for monitoring corner deformation in X, Y and Z directions generated by the negative ring segment; the data post-processing system comprises a local server and is used for cleaning and pre-processing the monitoring data and calculating deformation data by applying a corresponding algorithm in the local server; the visual monitoring system is used for carrying out three-dimensional visual dynamic display on the negative ring duct piece according to the deformation data and the accumulated deformation data; when the threshold value is exceeded, alarm processing is carried out. The system has the beneficial effects that real-time automatic acquisition, remote wireless data transmission and remote real-time monitoring and early warning of negative ring duct piece deformation during shield tunnel starting tunneling can be achieved, and the requirement for shield attitude control during shield tunnel starting tunneling construction is met.

The invention provides a hollow slab internal mold construction system, and relates to the technical field of building construction. A first construction result acquisition module; the initial construction parameter optimization module is used for scanning the first construction result through a laser scanner, analyzing and determining first concrete compactness deviation and first construction deviation, optimizing initial construction parameters and determining first optimal construction parameters; and the construction operation module is used for executing the construction operation of the second pouring interval according to the first optimal construction parameters until the preset construction period is completed. By means of the method, the technical problems that in an existing method, due to the fact that accuracy and timeliness of construction parameter regulation and control are insufficient, overall construction errors are seriously accumulated, and overall construction quality is affected can be solved, pouring parameters and vibration parameters can be rapidly and accurately adjusted, construction management and control fineness and intelligence are improved, and construction efficiency is improved. Therefore, the problem of construction regulation lag is effectively solved, and the construction precision and the construction quality are remarkably improved.

The invention belongs to the technical field of building robots, and particularly discloses a self-propelled reinforcing steel bar binding robot moving chassis and method, the moving chassis comprises a cross-layer inverted-T-shaped rack assembly, an environment sensing and automatic control assembly is arranged at the top end of the cross-layer inverted-T-shaped rack assembly, and a step-by-step lifting transverse propelling assembly is arranged at the bottom end of the cross-layer inverted-T-shaped rack assembly; self-adaptive high-position longitudinal moving assemblies connected with the cross-layer inverted-T-shaped rack assembly are arranged on the two sides of the environment sensing and automatic control assembly at intervals. Two pairs of driven double-hub wheel assemblies connected with the cross-layer inverted-T-shaped rack assembly are arranged on the two sides of the step-by-step lifting transverse propelling assembly in a clearance mode. The mobile chassis of the self-propelled reinforcing steel bar binding robot can automatically and stably walk on complex reinforcing steel bar mesh surfaces with different sizes and specifications, so that the construction efficiency of reinforcing steel bar binding operation is greatly improved, and the construction period is remarkably shortened.

An intelligent construction method for strip mine blasting comprises the steps that a blasting area measuring system is used for measuring multiple steps and a stratum structure in a strip mine field blasting area, and a three-dimensional model of the blasting area is established according to measured data; a throwing blasting design system is used for obtaining three-dimensional model data of a blasting area, and a drilling arrangement scheme, blasting parameters and charging structure data of each step are designed; an intelligent drilling system of the drilling machine obtains a drilling arrangement scheme and moves to a preset planned drilling position for drilling operation according to the drilling arrangement scheme; the intelligent charging system obtains blasting parameters, charging structure data and a drill hole arrangement scheme, an explosive mixed charging truck is controlled to reach a drill hole position, and charging operation is carried out in a drill hole according to the blasting parameters and the charging structure data; after the charging operation is completed, rock stratum blasting operation and coal seam mining operation are carried out; according to the invention, the construction precision of throwing blasting drilling and charging links can be improved, the working intensity is reduced, the construction efficiency is improved, the blasting effect is improved, and the production cost is reduced.

The invention provides a building heat exchange station machine room assembly type modular construction method for a hotel, and belongs to the technical field of building construction, and the method comprises the steps: building a three-dimensional model through the measurement of a total station and BIM software; a typical heat exchange load demand scene is determined; establishing a multi-objective optimization model; solving the optimization model to obtain an optimal segmentation parameter; segmenting the digital module; prefabricating and processing pipelines in a factory and performing quality control; the prefabricated pipelines are coded and assembled into unit modules; and finally carrying out field assembly. According to the method, technologies such as accurate measurement, digital modeling, multi-objective optimization and modular prefabrication are combined, and efficient and accurate design and construction of the heat exchange station machine room are achieved. The mode of factory prefabrication and on-site assembly is adopted, the on-site construction time is greatly shortened, and the construction quality and precision are improved; the problems that according to a traditional construction method, pipeline layout is difficult to accurately control, equipment installation needs to be adjusted and reworked on site, and construction efficiency is affected are solved.

The invention relates to the technical field of concrete admixtures, and discloses a nano rebound inhibitor for shotcrete and a preparation method thereof. The components, measured by weight, include 400-600 parts of nano microspheres, 400-550 parts of nano calcium carbonate, 10-30 parts of sodium carbonate, 1-10 parts of sodium aluminate, 10-30 parts of alum, 18-40 parts of polycarboxylic acid water reducer, and 0-0.5 parts of triterpenoid saponin; the nano microspheres are hydrated calcium silicate with silicon dioxide as the core material and colloid as the shell material, and the colloid is doped with a lithium source. The nano rebound inhibitor of the present application can significantly improve the state of shotcrete and greatly reduce the rebound amount of concrete, thereby further saving construction costs and accelerating construction accuracy. By utilizing the characteristics of the mineral admixture in the nano rebound inhibitor, the compactness of the concrete can be improved, and the durability of the shotcrete can be further improved.

The invention provides an automatic hole finding prefabricated lifting component and a using method thereof.The automatic hole finding prefabricated lifting component comprises a lifting appliance, the lifting appliance comprises a sleeve, a telescopic supporting column is arranged on the sleeve, horse legs are arranged at the bottom of the supporting column, a second-stage rotating device is arranged between the supporting column and the horse legs, a first-stage rotating device is arranged at the top of the supporting column, and rotating horseshoes are arranged on the horse legs; a first lifting baffle and a second lifting baffle are arranged on the two sides of the horse legs respectively. The whole structure can automatically find holes, the accident risk is reduced, the operation process is simplified through the automatic hole finding function, manual intervention is reduced, and operation convenience is improved. The process of repeatedly adjusting the position of the lifting machine is omitted, the lifting time is obviously shortened, and the operation efficiency is improved. According to the overall structure, the process of horseshoe vertical state-entering state-horizontal state-square block hoisting-vertical state-hoisting tool pulling-out is achieved, the hoisting tool can be recovered to the initial state after hoisting is completed, then the hoisting tool is recycled, the hoisting efficiency is improved, and the hoisting cost is reduced.

The invention provides a cable laying management method and system for communication construction, and relates to the technical field of cable laying, and the method comprises the steps: obtaining cable laying space features and a target coverage area, carrying out the installation relevance and construction constraint analysis of communication construction materials, and constructing a material laying feature network. Cable laying space characteristics and a target coverage range are used as search constraints, and material setting and positioning, cable bending radius and tension control and path planning search optimization are carried out according to a design target and construction requirements, so that cable laying management target parameters are obtained; according to the cable laying management target parameters, matching tracking is carried out on the whole period of cable laying construction, laying management information is fed back, the technical problems of low construction efficiency, high cost and difficulty in coping with complex construction environments caused by insufficient flexibility and untimely feedback of cable laying management are solved, and the purposes of improving the construction efficiency and precision and reducing the construction cost are achieved. And the cost is reduced, and the method effectively adapts to complex construction environments.

The invention provides an intersecting shield interval protection construction method, which belongs to the technical field of building construction, and comprises the following steps: firstly, excavating an open cut foundation pit at an intersection, arranging a cast-in-situ bored pile and a crown beam as an enclosure structure in the foundation pit, and arranging a steel support system at the same time. And after the enclosure structure is completed, the foundation pit is excavated to the designed depth, and reinforced concrete supporting piles and pile top beams are constructed. And on the basis, a reinforced concrete protection plate is poured to form a sheet pile structure type protection structure system. And finally, foundation pit filling is completed in a backfilling mode. Before the shield passes through the cross point, a test section is arranged to collect related construction data, and preparation is made for subsequent formal tunneling. And in the actual shield tunneling process, the tunneling speed and the soil bin pressure are controlled, and synchronous grouting is conducted. And after crossing the cross point, arranging closed rings in the front and back areas, and carrying out wall back grouting by adopting double-liquid slurry. And finally, a geological radar is used for detecting the cavity and repairing, and the problem of mutual influence in up-down close-distance crossed tunnel construction is solved.

The invention relates to the technical field of ultrahigh pier bridge construction and control, in particular to a bridge pier high-precision measurement and control multivariate data fusion control method, unit and system. By acquiring the first real-time sampling data, the second real-time sampling data and the third real-time sampling data, the sag and the elevation of the pier in the construction process are monitored in real time, so that the accuracy and the consistency of pier construction are ensured; and then dynamic adjustment is carried out according to the weights of the first real-time sampling data, the second real-time sampling data and the third real-time sampling data, so that the accuracy of data fusion is improved, the three pieces of real-time sampling data can be effectively fused and an optimized result is obtained at different heights, namely real-time fusion data for guiding construction adjustment, and the construction efficiency is improved. The method is used for guiding the construction operation, timely finding and correcting the deviation, improving the construction efficiency and precision, and solving the problem that the elevation and the sag of the bridge pier are difficult to effectively control due to insufficient measurement precision and lack of real-time monitoring means in the traditional bridge pier construction process.

The invention provides a pile structure positioning device with a local resonance unit and a forming construction method.The pile structure positioning device is arranged at a notch of a digging groove, and the pile structure positioning device comprises a fixing ring, a connecting plate, an adjusting air cylinder, a stress plate and a positioning ring; the fixing ring is arranged in the middle of the top of the reinforcement cage; the outer diameter of the positioning ring is smaller than the inner diameter of the fixing ring; the periphery of the bottom side of the positioning ring is fixedly connected with a plurality of connecting plates vertically extending into the deep position of the digging groove, the outer side wall of each connecting plate is provided with an adjusting air cylinder, and the telescopic end of each adjusting air cylinder is fixedly provided with a stress plate and abuts against the inner wall of the reinforcement cage. Compared with the prior art, the pile structure positioning device designed through the method can ensure the placement precision of the local resonance unit, and the influence of position deviation on the vibration reduction effect is avoided.

The invention belongs to the technical field of building construction, and discloses an external wall panel hoisting and positioning device and method for green building construction, and the device comprises a fixed seat, a rotating seat assembly, an overturning motor, a rope winding motor, a rope lifting mechanism, an extension assembly, a clamping assembly and a hoisting monitoring mechanism; a rotating seat assembly is rotatably arranged on the fixed seat; an overturning motor is fixedly arranged on the fixed seat; the output end of the overturning motor is fixedly connected with the center position of the rotating base assembly. A plurality of rope winding motors are fixedly arranged on the fixed seat; a plurality of lifting rope mechanisms are arranged on the toothed rail in a sliding manner; four groups of extension assemblies are arranged on the rotating seat assembly in a sliding manner; clamping assemblies are rotatably arranged on the extension assemblies; and a hoisting monitoring mechanism is fixedly arranged on the fixed seat. The hoisting process of the external wall panel is monitored in real time, possible abnormal conditions can be found and early warned in time, the external wall panel is prevented from shaking, overturning of the external wall panel between different states is supported, and the flexibility in the construction process is improved.

The invention relates to a steel pipe pile and steel sheet pile combined pile sinking process and a combined pile sinking device thereof, and belongs to the technical field of pile foundation construction. The steel pipe pile and steel sheet pile combined pile sinking technology comprises the following steps that S1, steel pipe piles and steel sheet piles are assembled to form a combined body of the steel pipe piles and the steel sheet piles; s2, according to the size of the assembly, the sizes of a first hydraulic clamp, a second hydraulic clamp and a third hydraulic clamp are set, and the three hydraulic clamps are installed on sliding rails of a vibratory hammer correspondingly; s3, the first hydraulic clamp and the second hydraulic clamp are arranged on the two sides of the top of the steel pipe pile in a clamped mode correspondingly, the third hydraulic clamp is arranged on the top of the steel sheet pile in a clamped mode, and the gravity center of the vibratory hammer and the gravity center of the combined body are located on the same vertical line; and S4, combined pile sinking is conducted. According to the combined pile sinking process, the steel pipe piles can be prevented from rotating in the soil body through resistance of the steel sheet piles, so that the lock catches of the steel sheet piles and the steel pipe piles are in lap joint according to designed positions, and deviation of actual construction positions is avoided.

The present invention discloses a reaming drill bit, which includes a drill barrel, an end head, an expansion wing assembly, a piston assembly, and a detection device, wherein the end head is installed at the end of the drill barrel, the piston assembly slides relative to the drill barrel, the piston assembly is suitable for driving the expansion wing assembly to expand or retract, a first injection channel is provided in the drill barrel, and the piston assembly is provided with a first pressure relief channel and a second pressure relief channel. When the piston assembly drives the expansion wing assembly to expand into place, the first pressure relief channel is connected to the first injection channel; when the piston assembly drives the expansion wing assembly to retract into place, the second pressure relief channel is connected to the first injection channel, and the detection device is suitable for detecting the pressure or flow in the first injection channel to check whether the expansion or retraction of the expansion wing assembly is in place. The present invention realizes the drive control of the expansion wing with an economical and effective solution, improves the rigidity of the equipment, is more suitable for hard rock and soil, and can help operators master the working status of the equipment.

The invention relates to a soft rock tunnel grouting combined control excavation system and a construction method. The soft rock tunnel grouting combined control excavation system comprises a concrete grouting stopping wall, a tunnel, a grouting stopping rock tray, a primary supporting type steel frame, a small guide pipe shaping support, a guiding construction platform, a temporary inverted arch, a grouting platform and a section steel transverse temporary supporting frame. The construction method has the beneficial effects that after the first round of advanced grouting, excavation is reserved, the assembly type grout stop wall is installed, the grouting pipe is arranged, and advanced grouting is conducted; the influence of gushing water on a tunnel structure, an underground water environment and surface vegetation is effectively controlled; the lower flange of the primary support profile steel is clamped between the inclined I-shaped steel and the cushion block, and the primary support steel frame fixing bolts are installed in a hole forming mode to complete installation of the small guide pipe connecting device, so that the construction precision of small guide pipe installation is greatly improved, and the small guide pipe connecting device can be recycled.

The invention relates to the field of data processing, in particular to a shield tunneling machine tunneling efficiency analysis method and device based on big data, and the method comprises the steps: obtaining geological parameters, and determining the type of a cutting head of a shield tunneling machine and initial tunneling parameters; controlling a shield tunneling machine to perform tunneling and deslagging according to the initial tunneling parameters, and acquiring tunneling data in real time; performing tunneling efficiency evaluation; judging whether an expected standard is reached or not according to a tunneling efficiency evaluation result, and if the expected standard is not reached, updating tunneling parameters; controlling the shield tunneling machine to continue tunneling and deslagging according to the updated tunneling parameters; comparing the tunneling data before and after the tunneling parameters are updated, and analyzing the change condition of the tunneling efficiency; if the speed increasing amplitude is smaller than the preset amplitude, correcting the updated data; and if the speed increasing amplitude is larger than or equal to the preset amplitude, the updated tunneling parameters are continuously used for controlling the shield tunneling machine to continue tunneling and deslagging. Through dynamic adjustment and a real-time feedback mechanism, the tunneling efficiency and the construction precision are improved.

The invention relates to the technical field of building construction, and discloses a pre-embedded anchor bolt construction method which comprises the following steps: (1) a preparation stage; (2) a preliminary positioning stage: after the anchor bolt and the positioning plate are fixed, the positioning plate and the pre-embedded anchor bolt are preliminarily positioned through measurement and correction; and (3) a pouring positioning stage, including at least two times of pouring, measuring and correcting the position of the pre-embedded anchor bolt when the concrete is not solidified after each time of pouring, and pouring and positioning the pre-embedded anchor bolt. According to the scheme, the positioning plate and the pre-embedded anchor bolt are fixed in the mode of repeated pouring measurement correction in the pouring positioning stage, the deviation of the pre-embedded anchor bolt can be conveniently corrected in time, the concrete pouring stability of the pre-embedded anchor bolt can be further improved, and then the stability of ground building installation is improved.

The invention discloses an adjustable continuous beam cantilever construction monitoring system. The system comprises the following steps: S1, collecting data in a construction process; s2, performing decoding, filtering and digital processing to generate an original monitoring data set; s3, performing error correction and optimization on the original monitoring data set based on a Kalman filtering algorithm to obtain an optimized monitoring data set; s4, analyzing and optimizing the monitoring data set by adopting a support vector machine algorithm, and generating a construction adjustment instruction; s5, performing time sequence analysis and pattern recognition on the optimized monitoring data set, and detecting potential construction risks; and S6, receiving a construction adjustment instruction and a construction early warning signal, and dynamically adjusting the working parameters of the construction equipment. The system has the advantages of being high in data processing precision, high in real-time performance and high in construction safety.

The utility model discloses a prefabricated diaphragm wall type assembled subway entrance and exit structure which comprises side wall structures, a prefabricated top plate and a prefabricated bottom plate are arranged between the side wall structures of the entrance and exit, the prefabricated top plate and the prefabricated bottom plate are both connected with the side wall structures through ultrahigh concrete, and the side wall structures are formed by integrating an enclosure structure and a main body structure. The side wall structure comprises prefabricated underground diaphragm walls, and underground diaphragm wall inter-amplitude connecting assemblies are arranged between the adjacent prefabricated underground diaphragm walls. The foundation pit support structure, the waterproof curtain and the side wall of the main body structure are integrated, so that working hours and manufacturing cost are saved. According to the utility model, the connection scheme of the waterstop strip bags, the C / T inter-width connectors and the UHPC concrete wet joints is adopted between the prefabricated underground diaphragm walls, so that the waterproof and guiding effects are achieved. According to the utility model, the longitudinal tensioning connection scheme of the inter-width concave-convex tenons, the elastic sealing gaskets and the prestressed steel bars is adopted between the prefabricated plate widths, so that not only can shearing force be effectively transmitted, but also a water stopping effect can be achieved.

A C-shaped independent storage cabin saddle with a floating stopping component is provided with a movable saddle and a fixed saddle, the movable saddle and the fixed saddle are provided with supporting structures, and the lower portions of the supporting structures are fixed to a ship body structure through laminated wood. The movable saddle and the fixed saddle are each provided with two pairs of floating stopping components, the two pairs of floating stopping components are symmetrically arranged at the positions away from the center line of the tank by 1 / 3-1 / 2 of the diameter of the tank, and each pair of floating stopping components is symmetrically arranged on the two sides of the web. The bottom of a floating-stopping frame of the floating-stopping component is fixed to the ship body structure, a pressing component extends out of the top of the floating-stopping frame and is located above a transition flange at the bottom of the supporting structure, a floating-stopping wood block is fixed to the transition flange, and a distance exists between the pressing component and the floating-stopping wood block. A floating stopping device and a ship body reinforcing structure which are independently arranged are omitted, and on the basis that the requirement for supporting the tank body and the liquid cargo load is met, the buoyancy borne by the tank body under the accidental water inflow working condition is balanced, the structural stress is optimized, the structural weight is reduced, and the construction period is shortened.

The invention discloses a design method of a special-shaped large-section annular prestressed beam based on a finite element model, and relates to the technical field of civil engineering. The problems that due to the fact that a special-shaped ring beam is symmetrically arranged and tensioned, local stress is uneven, local concrete cracks possibly occur, and the stability of the whole structure is affected are solved. Through the finite element model and the finite element analysis technology, in combination with the specific stress characteristics of the special-shaped large-section ring beam, optimized arrangement of the prestressed tendons is achieved, the stress uniformity and stability of the structure are ensured, asymmetric prestressed tendon arrangement can be flexibly adjusted according to specific engineering requirements, the tension values borne by the section are consistent, and the construction efficiency is improved. According to the ring beam tensioning method, the integrity of the tensioned ring beam is better, the construction precision and economical efficiency of the structure are improved, risks in the construction process are effectively reduced through step-by-step construction and application of the life and death unit technology, and the construction efficiency and the structure safety are improved.

The invention discloses an embedded part positioning and adsorbing device and an embedded part construction method, and relates to the technical field of embedded part construction.The embedded part positioning and adsorbing device comprises a frame, powerful magnets are installed on the frame, and the frame is used for being attached to a wood formwork and corresponds to an embedded part on the other side of the wood formwork; therefore, the embedded part is adsorbed and attached to the wood formwork. By the adoption of the technical scheme, the embedded part is attracted through the powerful magnet, the embedded part is made to be tightly attached to the wood formwork, then the surface of the embedded part after concrete solidification can be flush with the surface of the concrete, follow-up construction precision is improved, the overall scheme is simple, cost is low, and the good result rate is achieved.

The invention discloses a BIM (Building Information Modeling)-based piping shaft casing pipe construction method, which comprises the following steps of: acquiring three-dimensional point cloud data of an internal structure of a piping shaft by utilizing laser scanning equipment, and converting the three-dimensional point cloud data into a BIM model through three-dimensional modeling software; restoring the existing pipeline layout in the BIM model by using a reverse engineering method; optimizing the casing design according to the prediction result, and simulating the installation process in the BIM model; generating a construction guide with an augmented reality mark; displaying superposition of the virtual model and the real environment through AR glasses; after the installation is completed, performing three-dimensional scanning by using laser scanning equipment, and comparing with original data to evaluate the precision; if it is found that the deviation exceeds a preset threshold value, simulating a repairing scheme through a BIM model and converting the repairing scheme into a field executable instruction; and finally, the sleeve is accurately adjusted through a customized fine adjustment tool until the deviation is controlled within a preset range, and repairing is completed. The problem that the pipeline and the wall surface are difficult to repair in a narrow space is solved, and the construction precision and efficiency are improved.

The invention relates to the technical field of automatic control, in particular to a formwork construction trolley control method and system. The method comprises the following steps: firstly, monitoring a functional part state of a formwork construction trolley in real time, generating equipment state monitoring data, and judging whether the data is abnormal or not; when the data is abnormal, a control instruction and an alarm are sent out; meanwhile, formwork position monitoring is started according to the control instruction, formwork position monitoring data are obtained, whether the retaining wall design requirement is met or not is judged, and if not, a formwork construction trolley is controlled to automatically adjust the formwork position, and the construction precision is improved; besides, river embankment condition characteristics in a construction area are monitored in real time, and working parameters of the formwork construction trolley are optimized according to river embankment condition changes and the retaining wall construction progress so as to adapt to the complex and changeable construction environment, and the construction safety is improved; through automatic control over the formwork construction trolley, the automation level and the overall benefit of river levee retaining wall construction are greatly improved.

The invention discloses a rotatable cantilever crane for erecting bridge sections and a method for erecting a steel box girder. The rotatable cantilever crane for bridge segment erection comprises a main framework, a crane carriage, a rotating mechanism and a lifting appliance, the main framework comprises two longitudinal main beams, a front cross beam and a rear cross beam are connected between the two longitudinal main beams, and a middle stand column and a rear stand column are connected to the lower portions of the middles and the lower portions of the rear ends of the longitudinal main beams correspondingly; the lower end of the middle stand column and the lower end of the rear stand column are both fixedly connected with the bottom frame, the bottom frame is movably matched with the walking track, supporting jacks are arranged on the lower portion of the front end and the lower portion of the rear end of the bottom frame, and a first main inclined supporting rod and a second main inclined supporting rod are detachably connected between the longitudinal main beam and the bottom frame. The hoisting trolley is movably arranged between the two longitudinal main beams, the lifting appliances are connected to the lower portion of a winch pulley block of the hoisting trolley through rotating mechanisms, and leveling jacks are arranged on the lifting appliances.

The invention discloses an overhead transmission line pay-off control method and system based on multi-source parameter perception, and the system comprises a sensing subsystem which collects the load and posture of a pay-off pulley, the posture and geographic positioning of a walking board, and the sag of a pay-off segment observation gear lead, and employs the collected data as the parameter induction quantity of a field pay-off process; the network subsystem is used for integrating the parameter induction quantity acquired by the sensing subsystem through a wireless ad hoc network to obtain a multi-device parameter value and transmitting the multi-device parameter value to the execution subsystem; and the execution subsystem is used for judging the obtained multi-device parameter values, and realizing the automatic unwinding of the overhead transmission line conductor based on multi-source parameter perception through automatic output adjustment of the stretching device.