292 results about "Track bed" patented technology

The utility model discloses a railway ballast track bed resistance rapid measuring vehicle which comprises a vehicle frame arranged above a track, a front wheel set and a rear wheel set are installed on the vehicle frame in the length direction of the track at intervals, and the front wheel set and the rear wheel set are both rolled on two steel rails. Two fastener disassembling and assembling mechanisms are installed on the frame in the length direction of the rail at intervals, two rail lifting mechanisms are installed on the frame in the transverse direction of the rail at intervals, the two rail lifting mechanisms extend to the rail webs of the two steel rails respectively, and two hydraulic supporting mechanisms are installed on the frame and located between the two fastener disassembling and assembling mechanisms. A resistance measuring mechanism is installed on the frame and located between the two hydraulic supporting mechanisms. According to the utility model, the operation convenience can be effectively improved, the detection efficiency is greatly improved, and safety accidents are avoided. The device is suitable for the technical field of railway ballast track bed resistance detection.

The present application relates to a kind of plate type ballastless track bed expansion joint glue injection and leveling integrated system, including control system, glue pipeline system, mobile platform, glue injection execution system, wherein glue pipeline system is applied to the pressure of glue body storage tank, force glue liquid to be transported along pipeline to the end of glue injection execution system, glue injection execution system is by six-axis mechanical arm control unit according to expansion joint space coordinate planning six-axis mechanical arm path information and forms six-axis mechanical arm action instruction, realizes six-axis mechanical arm end injection head to expansion joint and carries out glue injection operation.The present application is by setting glue injection execution system and glue pipeline system on mobile platform, can guarantee according to the length direction of expansion joint and carry out glue injection and according to stable glue injection quantity realize the glue injection of expansion joint, reduce labor intensity, improve the glue injection quality of expansion joint.

The invention provides an automatic ballast raking device for a railway ballast track. The device comprises an automatic walking module, a line state sensing module, a railway ballast cleaning module, a ballast raking module and an operation control system, wherein the railway ballast cleaning module is used for cleaning railway ballast covering the end part of a sleeper, the middle part of the sleeper and the surface of a fastener through a sweeper; sleeper end images are shot in real time through a visual sensor, a line state sensing module collects three-dimensional point cloud data of a ballast bed and the surrounding environment through a laser radar, and an operation control system recognizes the positions of sleepers according to the received sleeper end images and extracts the distance between the sleepers and the position of a sleeper box area. And according to the received ballast bed point cloud data, identifying and modeling a ballast bed profile before operation, calculating ballast raking amounts and ballast raking directions at different positions, and generating an operation mode and operation parameters. According to the device, automatic obstacle avoidance in the walking process is achieved, and self-adaptive adjustment and accurate control of operation parameters are achieved according to the track bed profile. Manual intervention is not needed in the whole operation process.

The invention provides high chloride ion permeation resistance steel fiber fine aggregate concrete and a preparation method thereof. The high chloride ion permeation resistance steel fiber fine aggregate concrete comprises the following raw materials in parts by weight: 200-300 parts of cement; 30 to 50 parts of metakaolin; 100 to 200 parts of fly ash; 50 to 100 parts of mineral powder; 1-8 parts of nano silicon dioxide; 800 to 1000 parts of sand; 800 to 1000 parts of stone; 10 to 60 parts of steel fiber; 150 to 200 parts of water; and 5-20 parts of a water reducing agent. The steel fiber fine aggregate concrete with high chloride ion permeation resistance has the advantages of improved mechanical properties and durability, extremely high chloride ion permeation resistance, excellent volume stability, low material cost, economic feasibility of large-scale application, and wide application prospect. And the strict service requirements of the urban rail transit ballast bed under the long-term dynamic load, stray current and erosion medium coupling effect are precisely met.

The invention relates to a segment reinforcing device for a shield tunnel and a construction method thereof, a steel ring is matched with a to-be-reinforced shield tunnel segment, one side of the steel ring is open, two steel corbels are located on the two opposite sides of the open end of the steel ring respectively, the outer circumferential wall of the steel ring is attached to the inner circumferential wall of the to-be-reinforced shield tunnel segment, and the outer circumferential wall of the steel ring is attached to the inner circumferential wall of the to-be-reinforced shield tunnel segment. The steel ring is fixedly connected with a to-be-reinforced shield tunnel segment through a chemical anchor bolt, and the outer walls of the two steel corbels are used for being connected with the two opposite side walls of a ballast bed in the to-be-reinforced shield tunnel segment in an attached mode correspondingly; the construction process comprises the steps of obtaining the curvature radius of the arc-shaped steel plate, manufacturing the steel ring, changing the row of the pipeline, installing the segment reinforcing device and recovering the pipeline. Compared with a traditional shield tunnel segment reinforcing mode, the strength of the shield tunnel segment is improved, meanwhile, the posture of the shield tunnel segment can be kept consistent with the posture of an existing shield tunnel segment, the normal use function of a shield tunnel is not affected, the space of the shield tunnel is not occupied, and the risk of deformation of the shield tunnel segment is reduced.

The invention discloses an orbit foreign matter detection method and system, and relates to the technical field of orbit detection.The method comprises the steps that an unknown foreign matter model is built through Gaussian distribution and a convex hull algorithm, and a known foreign matter model is built in combination with prior data; extracting a flat area of the ballast bed, projecting the foreign body model into a depth map and generating a shadow, and superposing to obtain a synthetic image with a mark; training a segmentation network by using the synthetic image and a real image, and obtaining a potential foreign matter mask through thermodynamic diagram binaryzation, connected domain analysis and size screening during reasoning; and inherent facility false alarms are eliminated through a secondary classification network, a real foreign matter detection result is finally output, alarm is triggered according to a detected threshold value, and efficient and accurate detection is realized. According to the method, on the premise that real foreign matter samples are scarce and ballast bed scenes are complex, efficient, accurate and real-time ballastless track foreign matter detection is achieved, meanwhile, the false alarm rate is reduced, and the generalization ability of the model to unknown foreign matter is improved.

The utility model provides a novel rail vehicle overload and unbalanced load detection device with multiple detection areas, and relates to the technical field of vehicle overload and unbalanced load detection. Comprising a plurality of measuring areas arranged along a steel rail and a terminal, and sleepers are arranged at the bottom of the steel rail at intervals in the extending direction of the steel rail; connecting main beams are pre-buried in ballast beds on two sides of a steel rail in each secondary measurement area respectively, and the connecting main beams on two sides are fixedly connected with two ends of a first number of sleepers respectively; a first shearing force sensor and a second shearing force sensor are arranged at the position, corresponding to the upper portion of each connecting main beam, of the steel rail at intervals so as to detect shearing force data; the terminal is electrically connected with the first shearing force sensor and the second shearing force sensor so as to receive shearing force data, and whether the vehicle is overloaded or not is judged according to the shearing force data. The stability of the structure in the corresponding measuring area is improved, installation is convenient, and compared with the prior art, cost is lower.

The utility model belongs to the technical field of track plate laying and pouring, and discloses a ballastless track plate laying and pouring construction crane which comprises a pouring stock bin, a movable door frame, a traction mechanism and a hoisting and clamping mechanism. The traction mechanism comprises a traction main frame, a traction hydraulic cylinder, a steel cable limiting winding column and a steel cable, one end of the steel cable is wound at the telescopic end of the traction hydraulic cylinder, and the other end of the steel cable bypasses the corresponding steel cable limiting winding column and then is vertically downwards connected with corresponding lifting lugs at four corners of the lifting clamping mechanism; the lifting clamping mechanism comprises a lifting main frame, a clamping hydraulic cylinder located in the middle and extending longitudinally and horizontally, clamping connecting longitudinal rods arranged in a bilateral symmetry mode, and clamping seats which are in bilateral mirror symmetry and connected with the clamping connecting longitudinal rods on the corresponding sides, and the clamping connecting longitudinal rods are hinged to the two ends of the clamping hydraulic cylinder through V-shaped oil cylinder connecting frames; the utility model has the advantages of automatic control clamping and loosening, simple and fast operation, stable clamping, stable hoisting and the like.

The utility model belongs to the field of tracks, and discloses a drainage type ballastless track bed structure which comprises a ballastless track bed main body, drainage mechanisms are arranged on the two sides of the ballastless track bed main body, and each drainage mechanism comprises a drainage channel, a water conveying pipe, a drainage pump and a pressurization drainage pipe, so that an efficient drainage system is formed, and the drainage capacity of a ballastless track bed can be remarkably improved. The drainage grooves formed in the bottoms of the rails are communicated with the drainage channels, and rapid drainage of accumulated water can be promoted; when the hourly rainfall is too large, the drainage pump is started, accumulated water is rapidly drained through the drainage groove, the drainage channel, the water conveying pipe and the pressurization drainage pipe in sequence, the problem that the accumulated water in the ballastless track bed structure cannot be rapidly drained is effectively solved, and therefore safe operation of a train on the ballastless track bed structure is guaranteed. And the occurrence risk of safety accidents such as train derailment is reduced.

The present application provides a kind of railway dirty way bed slurry and mud disease evaluation method, it is related to geotechnical engineering technical field, the present application obtains the continuous dynamic profile of railway bed in the process of vehicle passing, and the static profile before the vehicle passing, based on Sobel operator processing profile, to determine slurry and mud area and normal area, determine the void pore pixel point and mud jam pore pixel point of slurry and mud area;And judge the slurry and mud disease stage of way bed, according to the edge profile of slurry and mud area to judge the static instability degree of way bed;Compare adjacent time dynamic profile to determine the dynamic expansion of slurry and mud area and the situation of pore being dyed mud, combine static instability degree, dynamic expansion and pore being dyed mud situation, and the slurry and mud disease of way bed is evaluated as mild, moderate and severe.

The utility model relates to the technical field of track bed contact rails, in particular to a cast-in-place monolithic track bed contact rail embedded nylon sleeve support which comprises a support body, a first mounting plate is fixedly welded to the front side of the left side of the support body, and a second mounting plate is fixedly welded to the middle end of the right side of the support body. A line track is installed on the top of the support body, a clamping block is fixedly installed on the front side of the top of the support body and located on the front side of the line track, and a clamping plate is fixedly installed on the rear side of the top of the support body and located on the rear side of the line track. The problems that in the concrete pouring process, the sleeve possibly shifts, inclines and the like, a contact rail support is difficult to install in the later period, and manual supporting is needed are solved, a line track can be stably installed, the shaking condition is avoided, the installation stability of the embedded sleeve is improved, manual fixing is not needed, physical strength is saved, and the production efficiency is improved. And the working efficiency is improved.

The present application provides a self-stretching intelligent tamper, belonging to the technical field of railway ballast track tamper vehicle, comprising: a top connecting frame for connecting different direction tamper devices and tamper vehicles; a regulating mechanism is connected to the lower end of the connecting frame, for adjusting the oil pressure provided by the oil pressure mechanism according to the different degrees of dirt and mechanical state of the track bed, so that the self-stretching intelligent tamper head expands to the best working size; an oil pressure mechanism is connected to the lower end of the regulating mechanism, for transmitting oil pressure and providing oil pressure for the self-stretching intelligent tamper head; the lower end of the oil pressure mechanism is connected to a tamper body, and the lower end of the tamper body is connected to a tamper head. The present application effectively avoids the disturbance and damage of the tamper head to the indirect contact force chain between the sleepers and the ballast when the tamper is pulled out; reduces the resistance of the tamper insertion, eliminates the need for manual loosening operation before the tamper operation, and improves the efficiency of the tamper operation; the size of the tamper head can be automatically adjusted according to the different mechanical properties of the track bed, realizing differentiated tampering.

The application discloses a fastener plate lower anti-stray current system, which realizes the increase of the creepage distance of the fastener system, the reduction of the surface contaminant accumulation and the prevention of the internal conductive path from being penetrated by dust, oil and water and other contaminants, thereby making the fastener system have good insulation performance during long-term use. In the application, a plate lower insulation plate with good insulation performance is arranged under the iron pad plate to realize the electrical isolation between the upper iron part of the fastener and the track bed, and the insulation coating with good insulation performance and elasticity is sprayed on the surface of the fastener to realize the filling and sealing of the gaps of the components on the upper part of the fastener, thereby preventing the decrease of the overall insulation performance of the fastener caused by long-term use. The scheme is basically consistent with the installation of the general fastener, does not increase additional processes, and will not be obviously affected by any subsequent rail adjustment, and is suitable for large-scale construction.

The invention discloses a track board laying device and a track board laying method based on the BIM technology, and relates to the technical field of track traffic construction.The track board laying device is provided with a track transporting vehicle, a guide rail, a walking truss, a position adjusting mechanism and a track board clamping and laying mechanism; the track plate clamping and laying mechanism firstly slowly lowers the height to enable the lower surface of the track plate and the roadbed or ballast bed surface to be close to a preset gap; and then the adsorption force of the adsorption assembly is released, and the clamping assembly is gradually opened, so that the track plate is stably released and laid in place under the action of gravity. Through the process, the device can complete automatic transfer, accurate positioning and release laying of the track plate, and frequent manual adjustment operation during traditional manual matched hoisting is avoided.

1. Name of the design product: concrete surface laser detection frame (track base). 2. Use of the design product: high-precision laser detection of geometric parameters such as flatness and elevation of concrete surface. 3. Design points of the design product: in shape. 4. Picture or photo that best indicates the design points: perspective view.

The hand tie tamper, which is the article relating to the present design, is for repairing ballast tracks where the ballast has been granulated or where the ballast track bed pressure is low. As shown in the reference front view, it consists of a handle for operation, a vibration unit including a motor, a shock-absorbing arm, a beater, a control box, a battery holder located above the handle and a battery detachably mounted thereon, and a guard for protecting the battery.

The utility model discloses a ballastless track bed constructed based on a hardened ballast track bed, which comprises a grouting hardening layer, a hardened layer and a foundation bed body which are sequentially arranged from top to bottom, sleepers are arranged on the grouting hardening layer at intervals along the length direction of a track, two steel rails are arranged on the sleepers side by side, and the two steel rails are arranged on the foundation bed body. The grouting hardening layer is of a layered structure formed by grouting hardening of a gravel layer of the ballast track bed, and the hardening layer is of a dense layered structure formed by sedimentation of fine particles below the gravel layer in the ballast track bed. According to the utility model, a ballast track bed can be hardened to form a ballastless track bed, so that the engineering workload of construction is effectively reduced, the construction period is shortened, and the construction cost is saved. The ballast bed hardening device is suitable for the technical field of ballast bed hardening in track construction.

The invention relates to the technical field of robots, in particular to an advancing mechanism of a tunnel track detection robot, which comprises a walking rail, a walking bearing table capable of walking along the upper end surface of the walking rail and auxiliary wheels arranged below the walking bearing table, the triggering assembly comprises a driving part and a folding part; wherein the driving piece comprises a front plate arranged on the outer side of the walking bearing table and a driving shaft arranged on the outer side of the front plate; and moreover, the folding piece comprises a rotating plate, a turnover plate arranged on the outer side of the rotating plate, a first connecting shaft mounted on the inner side of the rotating plate and a first spring arranged on the outer side of the first connecting shaft. Power is provided for folding of the folding part, the second supporting block is driven to move through the power generated by contact of the front plate and the walking rail, the walking bearing table is prevented from inclining, and therefore the bearing table is assisted in walking continuously through the auxiliary wheels.

The utility model discloses a railway engineering maintenance turnout snow and sand removal purging device which comprises a supporting frame and further comprises pressure purging mechanisms connected to the two sides of the supporting frame, the pressure purging mechanisms are symmetrically distributed, and pressure gas is sprayed out in the length direction of parallel rails through the pressure purging mechanisms. The pressure purging mechanisms are attached to the guide rail and form a purging angle with the ground, a guide blowing mechanism is connected between the symmetrical pressure purging mechanisms, and gas is transversely pushed along the two sides of the guide rail direction and used for pushing sundries out of the ballast bed. The utility model belongs to the technical field of railway engineering maintenance devices, and particularly relates to a railway engineering maintenance turnout snow and sand removing purging device which improves the purging area of a track and track beds on the two sides, guides purging sandy soil and snow to flow, and improves the purging cleaning efficiency.

This application provides a detachable sweeping and suction device and a railway track bed vacuuming vehicle, including at least two sets of sweeping and suction components. Each set of sweeping and suction components includes a sweeping and suction component frame, a cleaning component, and a suction component, which are mounted on the sweeping and suction component frame. A sweeping and suction component separation device is connected to the sweeping and suction components and is used to drive the two sets of sweeping and suction components to move relative to or away from each other to change the cleaning range. A swinging suction pipe is provided, one end of which is connected to the suction component of the sweeping and suction components, and the swinging suction pipe can swing along with the movement of the sweeping and suction components. The two sets of sweeping and suction components are arranged side by side in the longitudinal direction, and can be brought together to clean the middle part of the rail, or can be separated laterally to clean both sides of the rail. The lateral movement distance can be adjusted as needed, making it suitable for various types of rails, with a wide coverage area, improving the applicability of the coal dust cleaning device, and meeting the coal dust cleaning operations of various types of sleepers.

The present application relates to a kind of theoretical detection methods for determining local void of monolithic track bed, comprising the steps of: obtaining train-monolithic track bed-lining-ground coupling vibration equation according to the control equation of rail, monolithic track bed and lining and the dynamic balance equation of train, the vertical acceleration of car body is calculated using Newmark algorithm;The Hilbert-Huang transform spectrum of the vertical acceleration of car body is obtained;According to the energy change of the Hilbert-Huang transform spectrum of the imf2 decomposition curve under the void state, the position of the local void area of monolithic track bed is judged.The beneficial effects of the present application are: the position of the local void area of monolithic track bed can be judged according to the energy value change of the Hilbert-Huang transform spectrum of the vertical acceleration of car body imf2;Whether there is track bed void and the starting position of void can be judged, and the severity of void length can be qualitatively estimated according to the length of energy value change, which helps to reduce the operation and maintenance cost of subway track.

The invention relates to the technical field of engineering surveying, and discloses a trackless fixed measuring device for a contact network, which comprises a measuring support and a measuring platform arranged on the measuring support, the measuring support comprises an upper supporting mechanism and a lower moving platform, the upper supporting mechanism and the lower moving platform are in butt joint up and down to form an I-shaped structure, and the measuring platform is mounted on the upper supporting mechanism. An adjusting assembly used for adjusting the horizontal height of the upper supporting mechanism and the measuring platform is installed in the middle of the top end of the lower moving platform. According to the invention, through the arrangement of the adjusting assembly, the height of the upper supporting mechanism and the height of the measuring platform can be accurately adjusted, so that the measuring platform reaches the required measuring height, the height of a track bed can be simulated, or the height of a track can be simulated through checking data and adjusting the height difference of the measuring platform, so that the measuring error is reduced; errors caused by accumulation of multiple times of measurement in traditional measurement are avoided, and the accuracy and efficiency of measurement are greatly improved.

The application provides a track vibration isolation elastic element state detection system and method, the system comprises a plurality of vibration detection devices containing vibration acceleration sensors, an excitation device containing force sensors and a calculation and analysis device, and the plurality of vibration detection devices are respectively arranged at each predetermined measuring point in the floating slab track, each measuring point is located on one side of one of the vibration isolators, the measuring points are divided into key measuring points and adjacent measuring points, and the excitation point is arranged on the lower foundation on one side of the key measuring point, so that the excitation point can be excited by the excitation device and force signal data can be obtained, and the vibration response to the excitation can be obtained by the plurality of vibration detection devices, the vibration response can be analyzed in combination with the distribution and correlation of the measuring points, the relative position relationship between the measuring points and the excitation point and the principle of the vibration response, and the state of the elastic element of the vibration isolator in the floating slab track bed can be determined, so that the problem of steel spring fracture can be found in time, and the operation safety of the floating slab track is ensured.

The application provides a method and system for real-time detection of ballast lateral resistance, which directly correlates the ballast lateral resistance with the lateral displacement of an intelligent detection vehicle by establishing a static model of a ballasted track and a simulated detection vehicle-ballasted track dynamic coupling model, so that the lateral displacement of the intelligent detection vehicle at the position corresponding to each sleeper can be collected in real time during the driving of the intelligent detection vehicle of the real-time detection system of the ballast lateral resistance; according to the lateral displacement of the intelligent detection vehicle, in combination with the corresponding relationship between the ballast lateral resistance and the lateral displacement of the intelligent detection vehicle, the ballast lateral resistance can be analyzed and output in real time, so that the real-time nondestructive detection of the ballast lateral resistance is realized, the cumbersome process of removing fasteners and installing a loading device in the traditional detection is avoided, the detection efficiency is significantly improved, and the application is especially suitable for the short sky window time operation environment of a railway, and effectively prevents the instability risk of the ballasted track caused by insufficient ballast lateral resistance.

The application relates to a composite sleeper. The composite sleeper comprises a sleeper and a functional layer. The sleeper is arranged on a track bed and has a rail bearing area. The functional layer is arranged between the sleeper and the track bed and corresponds to the rail bearing area. The functional layer comprises a first functional layer. The first functional layer is provided with a first stiffness area, a second stiffness area and a transition area along the extension direction of the sleeper. The first stiffness area is respectively located at the two ends of the first functional layer, and the second stiffness area is located between the two first stiffness areas. The vertical static stiffness of the first stiffness area is greater than that of the second stiffness area. The transition area is located between the first stiffness area and the second stiffness area, and the vertical static stiffness thereof is between those of the first stiffness area and the second stiffness area. The composite sleeper can provide differentiated supporting stiffness according to the stress requirements of different sections of the sleeper, and the stress concentration risk is reduced through smooth transition of the stiffness of the transition area.

To provide a steam weeding device that uses a relatively small boiler and a dedicated cover to shorten the heating time of weeds per unit area, and has mobility that allows it to travel at a constant speed on a track.SOLUTION: A steam weeding device for weeding using steam includes a running part capable of running on a track with rails and a track bed, a steam generating part for generating steam, a cover part that has side edge covers for covering both side edges of the rails and a gauge cover for covering the space between the rails, and an edge part that can abut against the track bed, and a steam supply part to supply steam into the cover part. An escape part is formed between the side edge cover and the gauge cover to prevent interference with the rail.SELECTED DRAWING: Figure 1

This invention provides a structure and construction method for repairing existing tunnels. The existing tunnel repair structure includes a corrugated plate assembly, anchors, rail guide plates, and a reinforcement layer. The corrugated plate assembly is formed by splicing stainless steel corrugated plates circumferentially along the existing tunnel, with inward flanges on both sides of each stainless steel corrugated plate. The ends of adjacent stainless steel corrugated plates are fixed together by bridging components. In this invention, the assembled corrugated steel assembly is connected to the track bed as a single ring structure via anchors and rail guide plates. It is then fixed to the existing tunnel as a whole by fasteners. Micro-expansion high-strength cement mortar is injected into the space formed between the assembled structure and the inner wall of the existing tunnel. After solidification, the reinforcement layer formed becomes an integral part of the stainless steel assembled structure and the inner wall of the existing tunnel, forming a common load-bearing structure, thereby achieving the purpose of repairing and reinforcing existing tunnels. This method is suitable for intermittent or continuous repair of tunnels such as subways and railways, and has high repair and reinforcement efficiency.

This utility model discloses a novel prestressed concrete railway sleeper, comprising a sleeper body laid on the railway track bed, a reinforcing cage inside the sleeper body for increasing strength, two diagonally distributed "J"-shaped pre-embedded bolt assemblies located inside the sleeper body and extending upwards to both sides of the rail mounting position, two diagonally distributed fixing holes on the upper surface of the sleeper body located on both sides of the rail mounting position, a steel base fixed to the upper surface of the sleeper body by the pre-embedded bolt assemblies, and a steel pad installed on the upper end of the steel base through the fixing holes. This novel prestressed concrete railway sleeper effectively improves the track geometry retention capacity and load-bearing strength of the sleeper body; moreover, the two-layer steel plate structure has suitable deformation capacity, attenuating the impact energy transmitted to the concrete sleeper, greatly reducing the ballast pulverization rate, and ensuring safe vehicle operation.

The invention relates to the technical field of railway engineering track structures, and discloses a double-block ballastless track temperature, humidity and stress state coupling simulation method, which comprises the following steps: determining a heat exchange process of a complex environmental condition and a ballastless track; finite element models of a temperature field, a humidity field and a stress field of the double-block ballastless track are established in finite element software ABAQUS, and corresponding grid attributes, boundary conditions and analysis step types are set respectively; a USDFLD subprogram, an HETVAL subprogram and an FILM subprogram which are used for temperature field calculation are written; calculating a temperature field of the double-block ballastless track bed; calculating a humidity field of the double-block ballastless track bed, and importing a temperature field calculation result into a humidity field finite element calculation model as a temperature condition; writing a USDFLD subprogram and a UEXPAN subprogram for calculating the stress of the ballastless track bed under the condition of damp-heat coupling; and calculating a stress field of the ballastless track bed, and taking calculation results of a temperature field and a humidity field as boundary conditions, so that accurate simulation of multi-field distribution of the double-block ballastless track bed under damp and hot force coupling is realized.

The present application belongs to the field of rail transit technology, and discloses a method and system for monitoring the creeping and close adhesion of a switch rail and an external locking device, wherein the method comprises: when the relative displacement of the switch rail connecting iron and the connecting iron seat occurs, the magnetic field induction sensor converts the number of magnetic gates and the magnetic pickup sequence of the magnetic field induction sensor passing through the magnetic grating into a magnetic signal; when the connecting iron seat is pushed by the locking hook assembly, the optical fiber pin sensor converts the force received by the optical fiber pin sensor into an optical fiber signal; the magnetic signal is processed to obtain the creeping amount of the switch rail and the external locking device; and the optical fiber signal is processed to obtain the close adhesion of the switch. The sensing unit is installed on the existing external locking device, and there is no need to punch holes in the track bed and the track, and other instruments and sensing devices are installed, so that the method is simple to install and simple to construct. The present application realizes the simultaneous monitoring of the creeping amount and the close adhesion of the switch rail and the external locking device.