286results about How to "Reduce construction risk" patented technology

The invention relates to the field of shield tunneling, and discloses a shield tunneling control method and system based on a rock-soil particle motion trail, and the method comprises the steps: fusion deployment of various types of high-precision sensors, intelligent anti-noise data collection and preprocessing, precise physical model construction, efficient numerical simulation optimization, and multi-parameter comprehensive detection and correlation analysis. And real-time data-driven adaptive control model construction, control instruction rapid generation and transmission, closed-loop feedback and continuous optimization are realized. According to the method, multiple links including fusion deployment of multiple types of high-precision sensors, intelligent anti-noise processing, physical model construction and the like are covered, all the links have a synergistic effect, data can be accurately obtained, data quality can be guaranteed, a simulation foundation can be provided, comprehensive evaluation, intelligent control and rapid instruction transmission can be achieved, continuous optimization is achieved through closed-loop feedback, and the method is suitable for large-scale popularization and application. And finally, the construction level in all aspects is improved, and complex engineering requirements are met.

The invention relates to the technical field of building engineering, in particular to a steel structure construction quality monitoring system based on an unmanned aerial vehicle and three-dimensional scanning, which comprises a data acquisition module, a data preprocessing module, a construction defect identification and risk assessment module and a quality assessment module, the data acquisition module acquires quality monitoring data of a construction site in real time; the data preprocessing module is used for preprocessing the acquired quality monitoring data; the construction defect identification and risk assessment module identifies steel structure defects in the construction process and assesses the severity of the steel structure defects; and the quality evaluation module performs comprehensive quality evaluation on the preprocessed quality monitoring data and provides corresponding repair suggestions. According to the method, key problem areas can be quickly identified, a construction resource allocation strategy is optimized, and comprehensive and accurate data support is provided for steel structure quality evaluation in a complex construction environment.

The invention belongs to the field of intelligent control systems, and particularly relates to a shield attitude real-time intelligent control method based on machine learning, according to the method, a data acquisition module can more comprehensively and accurately reflect the actual condition of shield construction, and in the control process, key parameters such as the working state of a jack and the pressure of a hydraulic system are monitored in real time, so that the control accuracy is improved. Abnormal conditions can be found in time, an emergency plan can be started, and the safety of shield construction is guaranteed. According to the real-time monitoring and feedback optimization mechanism, the safety and reliability of shield construction are effectively improved, and the construction risk is reduced.

The invention belongs to the field of tunnel engineering, and particularly discloses a tunnel surrounding rock multi-mode intelligent fine grading method and system, and the method comprises the steps: 1, constructing a sample library which comprises parameters while drilling of a tunnel face, a digital image and a corresponding tunnel face surrounding rock grade; 2, constructing a while-drilling parameter refined grading characteristic system; 3, constructing a surrounding rock intelligent grading model based on multi-modal data fusion; 4, dividing the rock mass in front of the tunnel face into a plurality of three-dimensional space unit bodies according to the tunnel contour and blast hole distribution characteristics; and 5, based on the surrounding rock intelligent grading model, finely and intelligently judging the grade of the tunnel face surrounding rock. According to the method, the intelligent surrounding rock grading model based on the multi-modal data fusion theory is constructed, the refined intelligent judgment of the tunnel face surrounding rock grade is realized, the precision and robustness of the refined intelligent judgment of the surrounding rock grade of the model are improved, the surrounding rock grading level in the construction stage is improved, more comprehensive reference is provided for a subsequent construction scheme, and the construction efficiency is improved. And tunnel intelligent construction is guided.

The invention discloses a construction method of a synchronous pouring type precast concrete split cover beam, a component mold of the synchronous pouring type precast concrete split cover beam and a component manufacturing method.The combined component mold is composed of a bottom mold, a side mold, a first side mold and a second side mold, and a baffle is arranged in a pouring area of the component mold; a plurality of components can be synchronously manufactured at a time through the mold, then the multiple components are spliced on site and cast in situ to form the component-piece-type prefabricated concrete cover beam, manufacturing of the large-cantilever prefabricated cover beam under the special working conditions that the construction site is narrow, the distance between supporting stand columns is small, cantilevers on the two sides are large, and the stress requirement is high can be achieved, and due to the fact that the prefabricated concrete cover beam is heavy, manufacturing cost is low. The prefabricated concrete cover beam is simple in structure and high in transportation difficulty, the transportation and hoisting difficulty is reduced by manufacturing the multiple components in a split mode, the manufacturing difficulty of the prefabricated concrete cover beam is reduced, meanwhile, manufacturing of the prefabricated concrete cover beam with the larger size and weight can be achieved, and the requirements for the prefabricated concrete cover beam in different projects are effectively met.

The invention relates to the technical field of data processing, and discloses a BIM-driven steel structure collaborative design method, device and equipment. The method comprises the steps of performing parameterization processing on building information data to obtain intelligent BIM data; performing multidisciplinary data exchange processing on the intelligent BIM data to obtain collaborative design data; performing intelligent structure analysis processing on structure information in the collaborative design data to obtain optimized structure data; performing adaptive component design processing on the optimized structure data to obtain customized component data; performing virtual construction simulation processing on the customized component data to obtain construction optimization data; intelligent operation and maintenance processing is carried out on the construction optimization data and the actual construction data, full-life-cycle management data are obtained, and the full-life-cycle management data comprise real-time monitoring data, performance evaluation results and predictive maintenance suggestions. The efficiency and accuracy of steel structure collaborative design based on BIM driving are improved.

The invention relates to the technical field of advanced geological prediction, in particular to an information fusion advanced geological prediction system based on multiple detection methods, which comprises a comprehensive analysis subsystem, an advanced prediction module and a notification and statistics module. Wherein the comprehensive analysis subsystem comprises a tunnel face analysis module, an advanced drilling analysis module and a geological radar analysis module. Various detection methods such as stress-strain monitoring, geological radar detection and advanced drilling are combined, the adaptability to a complex construction environment is improved, the intelligent level is improved, and rapid transmission and sharing of geological information are achieved; according to the method, data is analyzed in a centralized mode through a logic judgment program, geological abnormal conditions such as rockburst and discontinuous geological structures are found in time in the drilling process, and therefore corresponding early warning signals are output, and a clearer decision basis is provided for constructors.

The invention belongs to the technical field of stratum recognition, and particularly relates to a shield parameter geological recognition calculation method and system based on an unsupervised clustering algorithm, and the method comprises the steps: selecting a plurality of groups of data containing factors affecting stratum category recognition; pCA converts a group of complex related variables into fewer and irrelevant variables, and the new variables are called as main components and can capture most of information in original data; determining the clustering number of K-means + + by adopting an elbow method; determining the clustering number of a hierarchical clustering method by adopting a hierarchical tree; k-means + + and hierarchical clustering are respectively used for clustering the data, and evaluation indexes such as identification precision or contour coefficients of the data and the data are calculated, so that potential modes in the data are analyzed and mined more comprehensively. The invention aims to deeply explore the internal relevance between shield tunnel parameters and geological types, provides an innovative and robust solution for real-time detection of geological features in shield construction by overcoming the limitation of the prior art, and has wide application potential.

The invention discloses a canal channel dredging construction big data basic business management system, and relates to the field of dredging construction data management. A canal channel dredging construction big data basic business management system comprises a data processing module, a data analysis module and a data management module. The method solves the problems that in the actual use process in the prior art, only business data in construction of the trailing suction dredger can be managed, and accurate decision support cannot be provided for channel dredging work, and the real-time processing of the data in the channel dredging process can be realized by collecting and processing various data in real time and applying a big data analysis method, so that the real-time processing of the data in the channel dredging process can be realized. And deep mining and intelligent analysis are carried out on the collected data, and accurate decision support is provided for channel dredging work. Besides, the system has the functions of remote monitoring, fault early warning and the like, comprehensive and efficient management of the canal channel dredging construction big data basic business is realized, the construction efficiency and quality are improved, and the construction cost and risk are reduced.

The invention discloses a novel floating type converter station platform suitable for deep and far sea, and belongs to the technical field of offshore platforms, the novel floating type converter station platform comprises a floating platform, a buoyancy cabin, a stand column, a water ballast tank and a mooring rope, the floating platform is used for supporting a converter station and related operation equipment, and the floating platform is located on the sea surface; the buoyancy cabins are correspondingly arranged on the bottom surface of the floating platform and provide buoyancy support for the floating platform; the four stand columns are correspondingly connected to the four corners of the floating platform, and the sectional area of the water ballast space is at least two times that of the stand columns. The four water ballast tanks are correspondingly arranged at the bottoms of the stand columns, and the gravity center and buoyancy of the converter station platform are adjusted by controlling injection or drainage of ballast water of the water ballast tanks. The mooring cables comprise a plurality of mooring cables which are correspondingly arranged at the four corners of the floating platform respectively, and the floating platform is fixed to the seabed through multi-point anchoring. The floating type converter station platform can flexibly adapt to the deep and far sea environment, the construction cost and the collapse risk are reduced, and the bearing capacity, the structural strength and the stability of the floating type converter station platform can be improved.

The invention relates to the technical field of non-road mobile mechanical dynamics models, in particular to a method for establishing a digital model of a vibration system of a road roller. The method comprises the following steps: acquiring an initial pavement material vibration characteristic data set; performing multi-physical field coupling analysis on the initial pavement material vibration characteristic data set to obtain pavement material response characteristic data; performing dynamic system modeling on the vibration system of the road roller based on the pavement material response characteristic data to obtain an initial digital model of the vibration system; performing dynamic feature extraction on the initial digital model of the vibration system to obtain dynamic parameter mapping data of the vibration system; and performing parameter calibration on the initial digital model of the vibration system based on the dynamic parameter mapping data of the vibration system to obtain a digital model of the vibration system. The intelligent vibration system model can accurately capture the dynamic characteristics of soil, and the optimal compaction effect is achieved.

According to the construction method of the make-up water pipe reconstruction project, by means of deep fusion of three-dimensional modeling laser scanning and a geographic information system, the existing pipe and surrounding conditions are accurately surveyed, a route is scientifically planned, and the construction risk and the change possibility are reduced; and when the old pipe is dismantled, the flexible airtight packing cabin is matched with colloid injection to ingeniously stop water in a segmented mode, orderly cutting is matched, the pipe section is safely dismantled, blasting hazards are avoided, and the dismantling efficiency is improved. When the new pipe is laid, the damping and noise reduction cushion layers are arranged in the grooves, the external force resistance of the new pipe is enhanced, fine verification is conducted after sealing connection, and the laying precision and quality are guaranteed. After new pipe connection is completed, tracer particle water is injected, deep inspection is conducted, segmented pressure testing is combined, hidden danger all-around troubleshooting is conducted, repairing and perfecting are conducted in advance, the reliability of the new pipe is greatly improved, the construction efficiency, quality and water supply long-term stability of a make-up water pipe modification project are remarkably improved, and the operation and maintenance cost is reduced.

A building material lifting device belongs to the technical field of building machinery and comprises a support frame body and a distribution trolley. The supporting frame body comprises two counter weight bases arranged oppositely, supporting columns fixedly arranged at the front end and the rear end of the upper surface of each counter weight base in the longitudinal direction, longitudinal beams connected between the tops of the two supporting columns on the same side, a cross beam connected between the two longitudinal beams and lifting equipment connected to the bottom of the cross beam through a linear driving mechanism. The two ends of the cross beam extend out of the outer sides of the longitudinal beams on the same side, an engaged type pushing chain system is further fixedly arranged on the inner surface of the balance weight base and comprises a box fixedly connected with the inner surface of the balance weight base, an outlet is formed in one end of the box, and a pushing chain of the engaged type pushing chain system extends forwards from the outlet in the horizontal direction. And the end parts of the two pushing chains are jointly connected with a distribution trolley. According to the invention, automatic distribution of building materials can be realized, the construction efficiency and the management level are improved, and a technical foundation is laid for automatic development of building construction.

The invention discloses a three-dimensional visual monitoring method for the underground water level of a deep foundation pit. The method comprises the steps that a three-dimensional underground enclosure wall of the deep foundation pit is generated; automatically generating and updating a pit inside and outside water level fitting three-dimensional curved surface diagram in the three-dimensional underground enclosure wall of the deep foundation pit; automatically identifying and marking the highest point and the lowest point of water levels inside and outside the pit; marking the burial depth of the underground safe water level of the deep foundation pit; the three-dimensional position of the relief well in the open state is automatically generated and updated; and three-dimensional visual monitoring is conducted on the underground water level of the deep foundation pit according to the three-dimensional curved surface graph fitted by the water levels inside and outside the pit, the highest point and the lowest point of the water levels inside and outside the pit on the three-dimensional curved surface graph and the three-dimensional position of the in-pit decompression well in the open state. According to the method, the underground water level of the deep foundation pit can be visually monitored, and the comprehensiveness, accuracy and timeliness of monitoring are improved.

The invention discloses an ultrahigh ALC wallboard construction method adopting a frame method, and relates to the technical field of construction management, the method comprises the following steps: S1, construction preparation; s2, surveying and setting out; s3, a bearing frame and an operation frame are erected; s4, embedded steel bars and column steel bars are bound, and a formwork is installed; s5, beam bottom formwork installation and steel bar binding; s6, a beam side formwork is installed; s7, concrete pouring; s8, concrete curing; s9, a bottom layer ALC wallboard is installed; s10, an upper-layer ALC wallboard is installed; s11, glass fiber gridding cloth is attached to plate seams; and S12, performing the next process. According to the method, the ultrahigh wallboard is installed in a segmented mode, the installation difficulty caused by the fact that the whole board is too long can be effectively avoided through segmented construction, the precision and perpendicularity of the ALC wallboard are ensured, and the frame structure not only provides a supporting function, but also can play an effective limiting and correcting role in construction; and the mounting stability and accuracy of each section of wallboard are ensured.

The utility model discloses a shield machine airborne surrounding rock geological radar detection system, which is arranged on a shield machine cutterhead, a plurality of geological radar detection device mounting points are arranged on the cutterhead, and each mounting point is positioned on the rear side of the rotating direction of a hob; a slag scraping plate is installed on the rear side of the hob box, a reserved hole is formed in a cutterhead panel on the rear side of the slag scraping plate, a geological radar detection device is installed in the reserved hole, the geological radar detection device comprises a shell, and a signal transmitter, a signal transmitting antenna, a signal receiver, a signal receiving antenna and a geological radar main control unit are arranged in the shell. Rollers are arranged at the bottom of the shell, and the top of the shell and the cutterhead back plate are installed together through a telescopic connecting piece. According to the utility model, the radar geological imaging analysis device is embedded in the cutterhead panel, so that the real-time monitoring and early warning of the geological condition in front can be realized in the process of rotating along with the hob, the tunnel construction risk is effectively reduced, and the safe construction is ensured.

The present invention discloses a bridge cable laying device, which relates to the technical field of electric power construction equipment, and comprises a trolley moving along the bridge, the trolley is provided with a hanging ring for connecting a traction rope, and the trolley is provided with a clamping piece for connecting a cable; a storage bin is provided at the bottom of the trolley, and a plurality of cable pulleys are carried in the storage bin through a retracting assembly; each of the cable pulleys is provided with a first bidirectional electric push rod, and when the retracting assembly releases the cable pulley onto the bridge, the first bidirectional electric push rod is extended to abut against both sides of the bridge to lock the cable pulley. In the above technical scheme, the present invention provides a bridge cable laying device, which pulls the traction rope from one end of the bridge to the other end by hooking the traction rope on the hanging ring on the trolley; the retracting assembly on the trolley can release the cable pulley onto the bridge, and can also recycle the cable pulley on the bridge into the storage bin of the trolley; the construction risk is reduced and the construction efficiency is improved.

The invention belongs to the technical field of tunnels and underground engineering. According to the tunnel water inrush disaster frame difference method automatic identification early warning method and system, the number of water inrush points, the water inrush amount and the water inrush quality are monitored in real time, early warning is carried out, and the defect that tunnel water inrush disaster monitoring is carried out manually is overcome; the problems of poor tunnel environment, low monitoring video precision and poor real-time performance in manual monitoring are solved, the labor cost is reduced, and the construction safety is more effectively guaranteed.

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 discloses an open-type TBM shield reserving in-situ dismantling method for a broken stratum water conveying tunnel. The method comprises the steps that firstly, a collapsed cavity in the top of a shield is backfilled, and broken surrounding rock is subjected to grouting reinforcement; 2, integrally welding the shield; 3, mounting a TBM host and a bridge area hoisting facility; 4, TBM rear matched hoisting facilities are installed, and TBM rear matched equipment is dismantled; fifthly, a main beam and a rear support of the TBM host are dismantled; sixthly, a main drive and a cutterhead of the TBM host are dismounted; and seventhly, grouting reinforcement is conducted on the top area of the cutter head and the top area of the shield. According to the method, the top shield, the side shield and the bottom shield are integrally welded through profile steel before dismantling, the shields are not dismantled and are reserved as permanent supporting bodies during dismantling, various hoisting devices are matched, in-situ safe and efficient dismantling in the TBM hole is achieved, the stability of rock around the hole is fully guaranteed, the construction risk is greatly reduced, and the construction safety and the construction progress are effectively guaranteed.

The utility model discloses a post-cast ultra-high performance concrete structure between a prefabricated top plate and prefabricated walls, which is characterized in that wall joint surfaces of the two prefabricated walls are arranged on two sides of a top plate joint surface of the prefabricated top plate to form a groove structure with a concave cross section; a plurality of top plate overhanging steel bars in one-to-one correspondence are arranged on the two top plate combination surfaces and are arranged in an inner row and an outer row in the thickness direction of the prefabricated top plate; each pair of coaxially-arranged top plate overhanging steel bars in the two rows of top plate overhanging steel bars close to the outside of the two prefabricated top plates are provided with additional steel bars; a plurality of transverse steel bars are arranged on the additional steel bars in the width direction of the groove structure; and ultra-high performance concrete is poured in the groove structure. During construction, the prefabricated wall and the prefabricated top plate are manufactured firstly; then temporarily fixing in place through a temporary support; additional steel bars and transverse steel bars are arranged, and finally ultra-high performance concrete is poured. The device is convenient to install, the project construction period can be shortened, the construction risk is reduced, and good social and economic benefits are achieved.

The invention relates to a land turning-over method and system for a large asymmetric steel truss girder, and the method comprises the steps that at least three turning-over devices are arranged within the span range of a portal crane, and the multiple turning-over devices are located on the same straight line; the gravity center of the large-scale asymmetric steel truss girder is obtained, the large-scale asymmetric steel truss girder is tightly placed on the supporting pieces of the multiple turning-over devices, and the vertical line of the gravity center of the large-scale asymmetric steel truss girder and the straight line where the multiple turning-over devices are located is located between any two adjacent turning-over devices; a crane of the portal crane is moved to the position above a lifting lug of the large asymmetric steel truss girder, and the working end of the crane is connected with the lifting lug through a lifting rope; and overturning the large asymmetric steel truss girder to a critical state through the crane, and hoisting the large asymmetric steel truss girder. According to the land turning-over method and system for the large asymmetric steel truss girder, the construction efficiency can be improved, and the construction risk can be reduced.

The utility model discloses a guide sleeve for underwater insertion of a drill conductor, which comprises a first semicircular pipe and a second semicircular pipe, the first semicircular pipe is provided with a first connecting piece, the second semicircular pipe is provided with a second connecting piece, and the first connecting piece is connected with the second connecting piece. The first semicircular pipe and the second semicircular pipe are arranged on the flange in a butt joint mode, the first semicircular pipe and the second semicircular pipe are perpendicularly arranged on the flange, limiting blocks are arranged in the first semicircular pipe and the second semicircular pipe, and the limiting blocks abut against the drill conductor so that the drill conductor can be perpendicularly arranged in the first semicircular pipe and the second semicircular pipe. After the guide sleeve for inserting the drill conductor underwater is installed, the first semicircular pipe and the second semicircular pipe can be recycled and reused by disconnecting the first connecting piece and the second connecting piece. The device is small in size and convenient to disassemble, the construction difficulty is greatly reduced, and the construction risk and the project cost are reduced.

The utility model provides a protection device for an automatic pressure maintaining system of a shield tunneling machine. The protection device comprises a connecting pipe communicated with the automatic pressure maintaining system and the shield tunneling machine soil bin, a pipe opening of the connecting pipe is located on a breast plate of the shield tunneling machine soil bin, the protection device further comprises a seamless steel pipe elbow matched with the pipe opening of the connecting pipe, and one end of the seamless steel pipe elbow is fixed to the pipe opening of the connecting pipe in a butt joint mode. The other end of the seamless steel pipe elbow faces downwards, a horn mouth is arranged at an end opening of the seamless steel pipe elbow, the small-opening end of the horn mouth is in butt joint and fixed with the end opening of the seamless steel pipe elbow, a grating is fixed on the large-opening end face of the horn mouth, and a floating ball is movably arranged in the horn mouth. The automatic pressure maintaining system is simple in structure, the problem that the automatic pressure maintaining system is damaged due to the fact that muddy water intrudes through an automatic connecting pipeline when the position of muck in a soil cabin is high in an existing automatic pressure maintaining system is solved, and the risk that the automatic pressure maintaining system is damaged in the shield tunneling process is greatly reduced.

The invention discloses an assembly type prefabricated building installation construction management method and system, and relates to the technical field of building construction.Intelligent terminal equipment is arranged for personnel and equipment on a construction site, and real-time interaction and cooperative work between the personnel and the equipment are achieved through the indoor positioning technology and the wireless communication technology; according to the intelligent collaborative operation management mode, various state information of construction site personnel and equipment can be accurately mastered in real time, and task allocation and operation sequence optimization are carried out based on the information, so that the construction personnel can be engaged in work which is most matched with the skills of the construction personnel at the most appropriate time, and the working efficiency is improved. Construction equipment can be fully and reasonably utilized, idle and waste of personnel and equipment are avoided, waiting time and resource mismatching phenomena in construction are reduced, and therefore the construction period is greatly shortened.

The utility model relates to the technical field of building construction, in particular to a bolt lock catch tool type wall connecting piece which is used for connecting a scaffold and a building outer wall, the wall connecting piece comprises a tie screw and a scaffold connecting lock catch, and the scaffold connecting lock catch comprises a first lock catch and a second lock catch which are hinged to each other. The opposite sides of the hinged sides of the first lock catch and the second lock catch are fixedly connected with connecting lugs respectively, the two connecting lugs are connected through a lock catch bolt, the first lock catch and the second lock catch are buckled and then arranged outside a rod body of the scaffold in a sleeved mode, one end of the tie screw rod is connected to the hinged position of the first lock catch and the second lock catch, and the other end of the tie screw rod is connected to the hinged position of the first lock catch and the second lock catch. And the other end is connected into the building outer wall. The wall connecting piece has the advantages of being simple in accessory structure, easy and convenient to operate by workers, greatly improving strength and greatly reducing construction risks, meanwhile, the accessories of the wall connecting piece can be used repeatedly, and the purposes of improving work efficiency and reducing cost are achieved while scaffold construction safety is guaranteed.

The invention discloses a multi-factor-based deformation prediction method for shield construction crossing a building, and the method comprises the steps: building a multi-factor matrix through settlement data, inclination data, the distance between a construction tunnel face and a building, shield construction parameter data and geological information data of a construction region, which are obtained at a plurality of moments, and taking the multi-factor matrix as the input of a prediction model; the prediction value of the settlement data of the building is obtained, and the deformation prediction of the shield construction crossing the building based on multiple factors is realized. According to the method, through combination of the CNN and the LSTM model, not only can multi-factor characteristics be associated, but also the shield construction progress and the building deformation are associated through the factor of the distance between the shield construction and the building, and through the technologies, the construction risk can be effectively reduced, and the overall construction efficiency and economic benefits can be improved; and the settlement prediction is more intelligent, dynamic and refined. And the prediction precision and safety of the settlement of the adjacent building in the shield construction process can be greatly improved.

The invention discloses a precise-control three-main-truss steel truss girder closure section mounting method, belongs to the technical field of truss girder closure, and aims to realize precise control of a three-main-truss steel truss girder closure section through optimization of a closure section structure, a sling-free double-machine lifting technology, a steel girder longitudinal movement control method under limited release conditions and optimization and adjustment of a closure gap butt joint process. The invention discloses a method for predicting, analyzing and controlling a closure gap based on ballastless track control requirements. By means of the mode, according to the technical scheme, the closure section structure is optimized, the problem of diagonal web member interference in the hoisting alignment process is avoided, and the relative error of downwarping and rotating angles of closure openings on the two sides is reduced by adopting a sling-free double-machine hoisting mode and a control method; a cantilever steel beam on one side is integrally and limitedly moved longitudinally, a closure gap is expanded, the alignment difficulty of a closure section is reduced, and a vertical adjustment measure is improved by utilizing a low-temperature method; the problems that the linear requirement of a ballastless track is high, and the requirement for the installation precision of a closure section is high due to the fact that a steel strand stay cable can only be tensioned and cannot be released are solved, the technical scheme is feasible, and the construction cost is saved.

The utility model provides a reinforcing structure for a large-span underground excavation station to pass through a fault fracture zone, which comprises an earth surface grouting reinforcing body and an in-hole grouting reinforcing body which are arranged in a crossed mode, and the in-hole grouting reinforcing body comprises a peripheral grouting stopping rock disc and an internal reinforcing body. The peripheral grouting stopping rock disc comprises a base plate and side walls connected to the two sides of the base plate, the ground surface grouting reinforcing body is fixedly connected to the side walls, a through hole is formed in the ground surface grouting reinforcing body, and the internal reinforcing body is connected to the ground surface grouting reinforcing body and covers the through hole. A supporting space used for wrapping the underground excavation station is formed among the peripheral grouting stopping rock disc, the earth surface grouting reinforcing body and the internal reinforcing body. The overall structure is simple, construction safety is guaranteed when the station passes through the fault fracture zone, and construction risks are reduced. And the ground surface grouting reinforcing bodies and the in-hole grouting reinforcing bodies are arranged in an intersecting mode, and the reinforcing reliability is good.

The present invention provides a tunnel boring machine equipped with a high-pressure water jet cutting system and a combined excavation method, including a tunnel boring machine body, a flow pump group is arranged on the tunnel boring machine body, and a high-pressure water jet cutting system is arranged at the front end of the tunnel boring machine; the high-pressure water jet cutting system includes a water jet-mechanical combined cutter disc, a water jet-shell knife combined tool, a high-pressure water transmission pipeline, a multi-media rotation center and a water jet diverter valve block, wherein one end of the high-pressure water transmission pipeline is connected to the flow pump group, and the other end is connected to the multi-media rotation center, and the multi-media rotation center is connected to the water jet diverter valve block, and the high-pressure water is divided into multiple paths, which are respectively supplied to each water jet-shell knife combined tool on the water jet-mechanical combined cutter disc. The present invention provides practical suggestions and references for the overall design, optimization and spatial layout of the high-pressure water jet system.