164 results about "Track bed" patented technology

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 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 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 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 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 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 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.

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.

The invention provides a kind of buried track bed plate, track bed and its construction method, because with multiple buried vibration isolators, plate body is arranged on the basement by multiple rubber springs, adopts point support mode to cut off the rigid connection between track structure and basement structure, absorbs the impact energy when train runs, realizes vibration reduction and noise reduction.The construction method of the invention combines the concept of prefabricated building, can improve construction accuracy and effect, the plate body uses prefabricated plate, the mounting seat of buried vibration isolator is pre-buried below the plate body, during construction, only need to place the height adjusting washer and spring assembly containing rubber spring on the basement at the set vibration isolator position, then place the prefabricated plate on the basement, make the upper end of spring assembly embedded in the corresponding mounting seat, the construction of buried track bed plate can be completed, therefore, construction is convenient, short construction period, suitable for track construction on viaduct.

The application discloses a modeling method of a two-dimensional ballast particle discrete element model and a modeling method of a two-dimensional sleeper-track bed-substrate discrete element model containing sand, and the modeling method of the two-dimensional ballast particle discrete element model comprises the following steps: extracting an outer contour of a ballast particle; determining an inner contour of the ballast particle according to the outer contour; filling the inner contour of the ballast particle with the largest inscribed circle disc until a preset standard is reached; filling a circle of inscribed circle discs between the inner contour and the outer contour of the ballast particle; exporting the radius and position coordinates of each disc after the filling is completed; and establishing a periodic boundary, and establishing a ballast particle discrete element model template according to the radius and coordinates of each disc. The two-dimensional ballast particle discrete element model provided by the application solves the contradiction between model precision and calculation cost, and the modeling method of the two-dimensional sleeper-track bed-substrate discrete element model containing sand can realize rapid filling of fine particles in a track bed ballast gap, and other dirty track beds can be quickly established from the model filled with fine particles once.

The invention relates to the technical field of rail transit construction, in particular to a high-speed railway double-block type ballastless track bed modular building construction method which comprises base plate construction and track bed plate construction. Therefore, mechanical, intelligent and standardized construction of a double-block type ballastless track bed building mode is achieved, the strength and rigidity of the plate type track panel frame are higher than those of a traditional nested track panel frame, overall installation deformation is easy to control through the high-strength structural design, and the construction precision and quality of a track bed plate are guaranteed; the steel bar assembly and the prefabricated formwork can be integrally hoisted and disassembled in the construction process, so that the construction efficiency is improved, and modular construction of key procedures such as ballastless track bed steel bar construction, formwork transfer and installation and track panel assembly installation is achieved.

The invention relates to a ballast bed state evaluation method and device, equipment, a storage medium and a program product. The method comprises the following steps: under the condition that a current detection time period is the first detection time period, determining a target state value of each ballast bed state influence factor in the current detection time period based on ballast bed detection data of a target ballast bed section in the current detection time period; under the condition that the current detection time period is not the first detection time period, determining a target state value of each bed state influence factor in the current detection time period based on a target state value of each bed state influence factor in a previous detection time period of the current detection time period and a state change weight in the current detection time period; and track bed state evaluation is carried out based on the target state value of each track bed state influence factor in the current detection time period, and the track bed state of the target track bed section in the current detection time period is obtained. By adopting the method, the accuracy of ballast bed state evaluation can be improved.

The invention discloses a high-grade vibration reduction prefabricated slab adjusting structure and a ballast bed construction method based on the structure, and relates to the technical field of ballast bed construction. The device comprises a first adjusting assembly and a second adjusting assembly, the first adjusting assembly is composed of a swing component and a lifting component, the swing component comprises a first mounting base, a swing oil cylinder and a second mounting base, the lifting component comprises a lifting oil cylinder and a lifting frame, and a supporting base is arranged at the movable end of the lifting oil cylinder; the lifting frame is composed of a mounting plate and a guide seat, a penetrating guide slide way is arranged in the guide seat, a supporting slide beam is arranged on the supporting seat, the supporting slide beam is fixedly connected into the guide slide way when the elevation and the angle of the prefabricated plate are adjusted, and the supporting slide beam is slidably mounted in the guide slide way when the center line position of the prefabricated plate is adjusted. The adjusting device has the beneficial effects that the adjusting device can be suitable for adjusting a linear track prefabricated slab and can also be suitable for adjusting a curve track prefabricated slab.

The invention provides an embedded track for a metro depot wall type inspection pit and a construction method thereof.The embedded track comprises the inspection pit, notches are formed in the tops of the two side faces in the inspection pit, a track bed is arranged on the notches, a track bearing groove is formed in the upper surface of the track bed, and the track bed is divided into a track bed outer side wall and a track bed inner side wall through the track bearing groove; the top end of the ballast bed inner side wall is lower than the top end of the ballast bed outer side wall, a rail lower base plate and a steel rail are arranged in the rail bearing groove, a plurality of transverse maintaining assemblies are arranged on the two sides of the steel rail correspondingly, each transverse maintaining assembly comprises a supporting block and a supporting frame, the supporting blocks are obliquely arranged on the rail web of the steel rail, and first sawteeth are arranged on the sides, away from the steel rail, of the supporting blocks. One side of the supporting frame is attached to the side wall of the rail bearing groove, second sawteeth meshed with the first sawteeth are arranged on the other side of the supporting frame, and the rest space in the rail bearing groove is filled with high polymer materials. The device is suitable for being used in the inner wall type inspection pit of the metro depot and has good vibration and noise reduction performance.

The invention relates to the technical field of track maintenance prediction, in particular to a track line maintenance prediction system based on big data analysis, which is provided with a data acquisition module, a data analysis module, a feature recognition module, a feature judgment module and a maintenance regulation and control module. Screening a feature monitoring track section, performing morphological analysis processing on a ballast bed section model of the feature monitoring track section through a feature recognition module, performing section state analysis on a ballast bed morphological representation image, and judging an abnormal tendency category of the feature monitoring track section through a feature judgment module; and a track line maintenance regulation and control mode is determined through the maintenance regulation and control module. According to the method, the track section with the abnormal tendency is rapidly screened, the track line maintenance method is adaptively adjusted according to the actual track bed condition of the track section, and the efficiency and reliability of a track line maintenance prediction system are improved.

The present application relates to the field of rail transit, in particular to a magnetic type vibration isolator failure indicating device and its application method. The device comprises a fixed connecting seat and a height reference rod, and further comprises a warning head, a reverse pulling elastic element and a permanent magnetic suction head. The height reference rod partially penetrates the fixed connecting seat, and the warning head with a warning mark is arranged at the top of the height reference rod. The reverse pulling elastic element is arranged between the warning head and the fixed connecting seat or between the fixed connecting seat and the permanent magnetic suction head. The permanent magnetic suction head is arranged at the bottom of the height reference rod. The suction force of the permanent magnetic suction head is greater than the maximum rebound force of the reverse pulling elastic element, and is less than the total mass of the metal element fixed by the permanent magnetic suction head. A locking connection structure is arranged on the fixed connecting seat. The present application uses the magnetic type vibration isolator failure indicating device to monitor the working state of the steel spring vibration isolator of the built-in vibration isolation device in the floating slab track bed. The method is simple to operate, good in intuitiveness, high in accuracy, and has a very broad market application prospect.

The invention relates to the technical field of high-speed railway track bed slab construction, in particular to a plate type construction method of a high-speed railway double-block type ballastless track bed, which comprises the following steps of: sequentially stacking a reinforcing mesh, a sleeper and a track panel frame by utilizing hoisting operation to form a plate type structure; the plate type structure sequentially comprises a reinforcing mesh, a sleeper rail pressed at the upper end of the reinforcing mesh and a modularized track panel frame installed on the sleeper rail from bottom to top. The construction method has the beneficial effects that traditional double-block type ballastless track bed slab construction is converted into III-type plate type structure ballastless track bed slab construction through separate sleeper laying of the modularized track panel frame, the prefabricated reinforcing steel bar meshes and the sleepers, and reinforcing steel bar construction, double-block sleeper construction and track panel frame construction are integrated through the movable operation trolley; on-site operation of a double-block type ballastless track bed slab is converted into overall hoisting operation of a ballastless track of a type III plate type structure, meanwhile, a matched fine adjustment process is matched, fine adjustment operation of the plate type ballastless track bed is completed, and the double-block type ballastless track bed slab type construction method is achieved.

The invention relates to the technical field of subway construction, in particular to an auxiliary scattered laying construction method for a subway track laying machine. The construction method comprises the following specific steps: S1, construction preparation; s2, a walking rail and a rail laying crane are installed; s3, hoisting the materials; s4, track panel assembling and hoisting are carried out; s5, mounting a ballast bed reinforcing mesh; s6, adjusting the track state; s7, a formwork is installed; s8, ballast bed concrete is poured; and S9, maintenance and follow-up operation are conducted. By building a matched operation platform and integrating various track laying machines, full-process mechanical auxiliary operation from construction preparation, material hoisting and transportation, track panel assembly to track bed pouring and maintenance is achieved, and the problems that a mechanical laying method is high in site requirement and cannot be applied to complex areas are solved. And meanwhile, the defects that a manual scattered laying method is large in human input, low in work efficiency, unstable in quality, high in cost and has potential safety hazards are overcome, the rail laying construction requirements under the condition that the construction period is short are met, convenience and standardization of construction are considered, and efficient rail laying operation can be achieved without depending on a fixed rail laying base.

The present application relates to a kind of large adjustment quantity ballastless bed and its construction method.Existing ballastless track is formed by pouring, when the deformation of foundation exceeds the adjustment capacity of fastener, it needs to be adjusted by special means such as inverted arch cutting, uncovering plate expansion groove, soil digging and forced lowering.The present application includes prefabricated track slab, fine stone concrete adjustment layer and adjustment block;The middle part of prefabricated track slab is provided with vertical opening, and fine stone concrete adjustment layer is located in opening and the bottom of prefabricated track slab;Adjustment block is located on the transverse side of opening, the top of adjustment block is fixed on prefabricated track slab, and the lower part of adjustment block is located between fine stone concrete adjustment layer and prefabricated track slab.The present application adds specially designed adjustment block on the basis of prefabricated track slab, according to the size difference of variable length block in adjustment block, it is divided into different models, it can be replaced in operation process, can greatly improve adjustment capacity, enhance the adaptability of ballastless track to line foundation deformation, reduce foundation disease treatment workload.

The invention discloses a plateau alpine region crack-resistant durable foundation bed surface structure and a laying method thereof, the plateau alpine region crack-resistant durable foundation bed surface structure is arranged between a base plate fixed with a track plate and a foundation bed bottom layer, and the plateau alpine region crack-resistant durable foundation bed surface structure sequentially comprises an asphalt concrete waterproof sealing layer, a rubber asphalt stress absorbing layer and a crack-resistant base layer from top to bottom; the asphalt concrete waterproof sealing layer is obtained by mixing, paving and rolling aggregate and high-viscoelastic rubber modified asphalt; the rubber asphalt stress absorbing layer is obtained by synchronously spraying high-viscoelastic rubber modified asphalt and macadam on a steel wire mesh uniformly paved on the anti-cracking base layer, and the anti-cracking base layer is obtained by paving rubber modified cement stabilized macadam in a layered manner; the high-visco-elastic rubber modified asphalt is asphalt in which the mixing amount of the activated rubber powder is 25%-35%. The device is ingenious in structure and convenient to prepare, all the layers have a synergistic effect, load stress can be effectively dispersed, transmission of base layer concrete cracks is blocked, and therefore generation and expansion of track foundation bed cracks are restrained, and the service life of a track is prolonged.

The application discloses a rail transit vehicle speed identification method based on multi-mode sensing fusion, and relates to the technical field of rail transit operation monitoring. The method comprises the following steps: a plurality of sensing nodes are arranged along the longitudinal direction of the steel rail at intervals, each sensing node is provided with an information acquisition component, and the vertical acceleration and angular velocity of the track bed are detected through the component; a preset threshold value is set for the information acquisition component, and the acquisition is triggered when the motion energy exceeds the threshold value within a short time; the collected data is subjected to high-pass filtering processing, the maximum speed of the train and the track bed inclination are obtained; within a single wheel passing period, the accurate time when the wheel reaches the monitoring point is determined according to the track bed inclination and the vertical angular velocity; the time interval of the first and last axles of the last compartment passing the sensing node is calculated, and then the speed of the vehicle is calculated. The application fuses sensing information of two different principles, forms a complementary checking mechanism, improves the speed measurement robustness, and overcomes the problems that single sensor speed measurement is easy to be disturbed and easy to drift and fail.

The present invention relates to a method for the rehabilitation and / or stabilization of a track bed (1), wherein railway rails (3a, 3b) are attached to sleepers (2) and the sleepers (2) are arranged in or on the track bed (1) and stones, ballast (8) or the like are located in the track bed (1), wherein the rehabilitation and / or repair is carried out in the track bed (1) itself without detaching the sleepers (2), the rails (3a, 3b), and / or without removing the sleepers (2) from the track bed (1), wherein the sleepers (2) have a central section and two end sections, and the central section is located between the two end sections, wherein a continuous opening (4) is produced through the sleeper (2) in the region of the first end section and / or the second end section and / or the central section, preferably the opening (4) is produced by a bore, wherein a material, preferably an injection resin, is injected into the opening (4) or openings.which solidifies or hardens after application, wherein the injection resin, when injected through the opening (4) in the sleeper (2), enters the area below the sleeper (2) in the track bed (1) and there wets the track bed material, namely stones, ballast (8) or the like, and fills gaps and / or cavities in the track bed (1), and after the injection resin has solidified, the area of ​​the track bed (1) that is wetted by the injection material, or whose gaps and / or cavities are filled, forms a compact body (15) on which the sleeper (2) rests.