Ballastless track

Abstract

The present invention provides a ballastless track, comprising a track lower foundation, a concrete column, a spring damper and a track plate, wherein the track lower foundation is fixedly connected to the concrete column, the concrete column is connected to one end of the spring damper, and the other end of the spring damper is connected to the track plate. The ballastless track provided by the present invention has the functions of large-scale adjustment of the track and timely adjustment.

Description

Technical Field

[0001] The invention relates to the technical field of rail transportation, and in particular to a ballastless track. Background Art

[0002] With the continuous advancement of the high-speed railway process, ballastless track is widely used in high-speed railways, urban rail transit, and urban rail transit due to its high smoothness, stability, and low maintenance workload. During the operation of ballastless track, when there are uneven subgrade settlement, longitudinal deformation of bridge foundation, active fault zone misalignment and other track line deformation, the track smoothness will be greatly affected, thus endangering driving safety. Therefore, it is necessary to adjust the ballastless track to adapt to the needs of track unevenness and meet the requirements of high-speed railway operation.

[0003] At present, it is difficult to change the geometric shape of ballastless track after it is built. The engineering structures such as roadbed and tunnel do not have the ability to adjust deformation. In addition, it is difficult to adjust the deformation of track structure in most areas, and the cost of engineering solution is too high. Most of the existing track adjustment methods use fastener systems for adjustment, mainly by changing the thickness of the pad under the track to achieve uneven adjustment, but the adjustment amount of the fastener system is limited. Under normal circumstances, the maximum adjustment amount of the fastener system is 26mm, which cannot meet the needs of large adjustments such as active fault zone dislocation. At the same time, when a short-term sudden large deformation such as active fault zone dislocation and bridge longitudinal deformation occurs, if the corresponding track structure adjustment measures are unreasonable and untimely, the track structure will be damaged on a large scale, endangering driving safety. At the same time, after the track is damaged, it will be affected by the construction process and site conditions, and it will not be able to continue normal operation, which will bring huge maintenance difficulties and maintenance costs.

[0004] Therefore, there is an urgent need for a ballastless track that can achieve large-scale track adjustment and timely track adjustment. Summary of the invention

[0005] The object of the present invention is to provide a ballastless track to solve the problem that the existing ballastless track cannot have the functions of large-scale adjustment and timely adjustment of the track.

[0006] In order to solve the above technical problems, the present invention provides a ballastless track, including a track lower foundation, a concrete column, a spring damper and a track plate, wherein the track lower foundation is fixedly connected to the concrete column, the concrete column is connected to one end of the spring damper, and the other end of the spring damper is connected to the track plate.

[0007] Optionally, it also includes an embedded sleeve, which is embedded in the track plate and arranged perpendicular to the track plate, the concrete column is arranged in the embedded sleeve, and the spring damper passes through the wall of the embedded sleeve and is connected to the track plate.

[0008] Optionally, it also includes an embedded sleeve, which is embedded in the track plate and connected to the embedded sleeve. The spring damper is partially arranged in the embedded sleeve, and the other end of the spring damper passes through the tube wall of the embedded sleeve and is connected to the track plate.

[0009] Optionally, the embedded sleeve extends from the intersection of the embedded sleeve and the embedded sleeve in a direction away from the lower foundation of the track.

[0010] Optionally, the number of the embedded sleeves in each track plate is four, each embedded sleeve corresponds to four embedded sleeves, the four embedded sleeves are evenly distributed around the embedded sleeves, and one spring damper is arranged in one embedded sleeve.

[0011] Optionally, one end of the spring damper is hinged to the concrete column, and the other end of the spring damper is hinged to the track plate.

[0012] Optionally, the spring damper includes a steel spring, a spring piston and a spring sleeve, one end of the spring piston is arranged in the spring sleeve, and one end of the spring piston is slidingly connected to the spring sleeve, and the other end of the spring piston is hinged to the concrete column, the steel spring is arranged in the spring sleeve, one end of the steel spring is connected to one end of the spring piston, and the other end of the steel spring is connected to the spring sleeve, the cavity surrounded by the spring piston and the spring sleeve is filled with spring damping fluid, and the spring sleeve is hinged to the track plate.

[0013] Optionally, the spring piston includes a piston body, a first bearing outer ring, a first rolling element, a first bearing inner ring and a first connecting section, one end of the piston body is arranged in the spring sleeve, the other end of the piston body is fixedly connected to the first bearing outer ring, the first bearing outer ring is connected to the first bearing inner ring through the first rolling element, the first bearing inner ring is fixedly connected to the first connecting section, a first bolt hole is provided on the first connecting section, a second bolt hole is provided on the concrete column, the ballastless track also includes a first bolt, the first bolt passes through the first bolt hole and the second bolt hole to fix the other end of the spring piston to the concrete column; the spring sleeve includes a sleeve body, a second bearing outer ring, a second rolling element, a second bearing inner ring and a first connecting section. Two connecting sections, the steel spring is arranged in the sleeve body, one end of the steel spring is connected to one end of the piston body, the other end of the steel spring is connected to the sleeve body, the piston body and the sleeve body are slidably connected, the cavity surrounded by the piston body and the sleeve body is filled with spring damping fluid, the sleeve body is fixedly connected to the second bearing outer ring, the second bearing outer ring is connected to the second bearing inner ring through the second rolling body, the second bearing inner ring is fixedly connected to the second connecting section, a third bolt hole is opened on the second connecting section, a fourth bolt hole is opened on the track plate, and the ballastless track also includes a second bolt, the second bolt passes through the third bolt hole and the fourth bolt hole to fix the spring sleeve to the track plate.

[0014] Optionally, a displacement sensor is also included, and the displacement sensor is used to detect the expansion and contraction adjustment amount of the steel spring.

[0015] Optionally, it also includes a bolt pad, one side of which is fixedly connected to the concrete column, and the other side of which is fixedly connected to the lower foundation of the track.

[0016] The ballastless track provided by the present invention has the following beneficial effects:

[0017] The track lower foundation is fixedly connected to the concrete column, the concrete column is connected to one end of the spring damper, and the other end of the spring damper is connected to the track plate, so that the track plate is supported by the spring damper. The spring damper provides a certain rigidity to ensure that the spring damper does not produce telescopic deformation during the normal operation stage of the ballastless track, and can effectively provide buffering and vibration reduction effects to improve the safety and comfort of train operation; when the track lower foundation suddenly deforms greatly, the spring damper produces adaptive telescopic deformation, and the telescopic deformation of the spring damper is greatly improved compared with the displacement adjustment amount of the fastener system, which can effectively prevent the track plate from producing a large deformation with the track lower foundation. At the same time, compared with the general track large adjustment device, the spring damper can produce adaptive deformation at the moment of deformation of the track lower foundation, so that the ballastless track has the functions of large-scale adjustment and timely adjustment of the track, and effectively protects the safety and stability of the track plate while adapting to the deformation of the track lower foundation, ensuring the safety of train operation when the foundation of the sudden section is deformed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of a ballastless track in an embodiment of the present invention;

[0019] Figure 2 is a top view of a ballastless track in an embodiment of the present invention;

[0020] Figure 3 is an exploded schematic diagram of a ballastless track in an embodiment of the present invention;

[0021] Figure 4 is a bottom view of a ballastless track in an embodiment of the present invention;

[0022] Figure 5 is a cross-sectional view of a ballastless track in an embodiment of the present invention;

[0023] Figure 6 is an overall schematic diagram of a concrete column and a spring damper in an embodiment of the present invention;

[0024] Figure 7 is an exploded schematic diagram of a concrete column and a spring damper in an embodiment of the present invention;

[0025] Figure 8 is a schematic structural diagram of a spring damper in an embodiment of the present invention;

[0026] Fig. 9 is a cross-sectional view of a spring damper according to an embodiment of the present invention;

[0027] Fig.10 is a partial structural schematic diagram of a spring damper in an embodiment of the present invention;

[0028] Fig.11It is a structural schematic diagram of the vertical deformation of the ballastless track at the lower foundation of the track in an embodiment of the present invention;

[0029] Fig.12 is a comparative schematic diagram of the ballastless track in the embodiment of the present invention before and after the vertical deformation of the track lower foundation is adjusted;

[0030] Fig.13 It is a structural schematic diagram of the longitudinal deformation of the ballastless track in the embodiment of the present invention at the lower foundation of the track;

[0031] Fig.14 It is a structural schematic diagram of the ballastless track in an embodiment of the present invention in which the lower foundation of the track undergoes lateral deformation;

[0032] Fig.15 is a comparative schematic diagram of the ballastless track in the embodiment of the present invention before and after the longitudinal deformation of the track lower foundation is adjusted;

[0033] Fig.16 It is a comparative schematic diagram of the ballastless track in an embodiment of the present invention before and after the lateral deformation of the track lower foundation is adjusted.

[0034] Description of reference numerals:

[0035] 110-track lower foundation; 120-concrete column; 130-spring damper; 131-steel spring; 132-spring piston; 133-spring sleeve; 140-track plate; 141-embedded sleeve; 142-embedded sleeve; 150-bolt pad; 160-rail support platform; 170-displacement sensor; 180-insulating waterproof cover. DETAILED DESCRIPTION

[0036] The ballastless track proposed by the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer according to the following description. It should be noted that the accompanying drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0037] This embodiment provides a ballastless track. Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 , Figure 1 is a schematic structural diagram of a ballastless track in an embodiment of the present invention, Figure 2 is a top view of a ballastless track in an embodiment of the present invention, Figure 3 is an exploded schematic diagram of a ballastless track in an embodiment of the present invention, Figure 4is a bottom view of a ballastless track in an embodiment of the present invention, Figure 5 is a cross-sectional view of a ballastless track in an embodiment of the present invention, Figure 6 is an overall schematic diagram of a concrete column 120 and a spring damper 130 in an embodiment of the present invention, Figure 7 It is an exploded schematic diagram of a concrete column 120 and a spring damper 130 in an embodiment of the present invention. The ballastless track includes a track lower foundation 110, a concrete column 120, a spring damper 130 and a track plate 140. The track lower foundation 110 is fixedly connected to the concrete column 120, the concrete column 120 is connected to one end of the spring damper 130, and the other end of the spring damper 130 is connected to the track plate 140.

[0038] The track lower foundation 110 is fixedly connected to the concrete column 120, the concrete column 120 is connected to one end of the spring damper 130, and the other end of the spring damper 130 is connected to the track plate 140, so as to support the track plate 140 through the spring damper 130. The spring damper 130 provides a certain rigidity to ensure that the spring damper 130 does not produce telescopic deformation during the normal operation stage of the ballastless track, and can effectively provide a buffering and vibration reduction effect to improve the safety and comfort of train operation; when the track lower foundation 110 suddenly deforms greatly, the spring damper The spring damper 130 produces adaptive telescopic deformation. The telescopic deformation of the spring damper 130 is greatly improved compared with the displacement adjustment of the fastener system, which can effectively prevent the track plate 140 from producing a large deformation with the lower track foundation 110. At the same time, compared with the large adjustment device of the general track, the spring damper 130 can produce adaptive deformation at the moment of deformation of the lower track foundation 110, so that the ballastless track has the functions of large-scale adjustment and timely adjustment of the track, and effectively protects the safety and stability of the track plate 140 while adaptively adjusting the deformation of the lower track foundation 110, ensuring the safety of train operation when the foundation of the sudden section is deformed.

[0039] In this embodiment, the track plate 140 is located above the track lower foundation 110 .

[0040] The ballastless track further includes an embedded sleeve 141, which is embedded in the track plate 140 and arranged perpendicular to the track plate 140, and the concrete column 120 is arranged in the embedded sleeve 141. The spring damper 130 passes through the wall of the embedded sleeve 141 and is connected to the track plate 140, so as to avoid stress concentration at the connection between the spring damper 130 and the track plate 140. Among them, sufficient space should be reserved for the embedded sleeve 141 to facilitate on-site installation and later operation and maintenance.

[0041] The ballastless track further includes an embedded sleeve 142, which is embedded in the track plate 140 and communicated with the embedded sleeve 141. The spring damper 130 is partially disposed in the embedded sleeve 142, and the other end of the spring damper 130 passes through the wall of the embedded sleeve 142 and is connected to the track plate 140. Through the interaction between the embedded sleeve 142 and the embedded sleeve 141, stress concentration at the connection between the spring damper 130 and the track plate 140 can be avoided.

[0042] like Figure 5 As shown, the embedded sleeve 142 extends from the intersection of the embedded sleeve 142 and the embedded sleeve 141 in a direction away from the track lower foundation 110. In this way, stress concentration at the connection between the spring damper 130 and the track plate 140 can be avoided.

[0043] In this embodiment, there are four embedded sleeves 141 in each track plate 140, each embedded sleeve 141 corresponds to four embedded sleeves 142, and the four embedded sleeves 142 are evenly distributed around the embedded sleeves 142. A spring damper 130 is arranged in one embedded sleeve 141, so that the track can be adjusted over a wide range in two mutually perpendicular directions.

[0044] The embedded sleeve 141 and the embedded casing pipe 142 are stainless steel pipes.

[0045] Preferably, one end of the spring damper 130 is hinged to the concrete column 120, and the other end of the spring damper 130 is hinged to the track plate 140, so that when the spring damper 130 is stretched and deformed in one direction, it will not cause deformation of the ballastless track in other directions.

[0046] Specifically, Figure 8 and Fig. 9 , Figure 8 is a schematic structural diagram of a spring damper 130 in an embodiment of the present invention, Fig. 9It is a cross-sectional view of a spring damper 130 in an embodiment of the present invention, wherein the spring damper 130 comprises a steel spring 131, a spring piston 132 and a spring sleeve 133, wherein one end of the spring piston 132 is arranged in the spring sleeve 133, and one end of the spring piston 132 is slidably connected to the spring sleeve 133, and the other end of the spring piston 132 is hinged to the concrete column 120, the steel spring 131 is arranged in the spring sleeve 133, one end of the steel spring 131 is connected to one end of the spring piston 132, and the other end of the steel spring 131 is connected to the spring sleeve 133, the cavity surrounded by the spring piston 132 and the spring sleeve 133 is filled with spring damping fluid, and the spring sleeve 133 is hinged to the track plate 140. The steel spring 131 and spring damping fluid in the spring damper 130 provide a certain spring stiffness to ensure that the steel spring 131 does not produce expansion and contraction deformation during the normal operation of the track structure, and can effectively provide a buffering and vibration reduction effect to improve the safety and comfort of train operation. When the lower track foundation 110 of the ballastless track suddenly undergoes a large deformation, the spring damper 130 produces an adaptive expansion and contraction deformation of the internal steel spring 131 to ensure that the track structure does not undergo a large deformation with the lower foundation, and the damping fluid can effectively buffer the impact of the deformation of the lower foundation structure to protect the safety and stability of the track structure.

[0047] Specifically, refer to Fig.10 , Fig.10 1 is a partial structural schematic diagram of a spring damper 130 in an embodiment of the present invention, wherein the spring piston 132 comprises a piston body, a first bearing outer ring, a first rolling element, a first bearing inner ring and a first connecting section, wherein one end of the piston body is disposed in the spring sleeve 133, and the other end of the piston body is fixedly connected to the first bearing outer ring, the first bearing outer ring is connected to the first bearing inner ring through the first rolling element, the first bearing inner ring is fixedly connected to the first connecting section, a first bolt hole is provided on the first connecting section, a second bolt hole is provided on the concrete column 120, and the ballastless track further comprises a first bolt, which passes through the first bolt hole and the second bolt hole to fix the other end of the spring piston 132 to the concrete column 120.

[0048] The spring sleeve 133 includes a sleeve body, a second bearing outer ring, a second rolling element, a second bearing inner ring, and a second connecting section. The steel spring 131 is arranged in the sleeve body, one end of the steel spring 131 is connected to one end of the piston body, the other end of the steel spring 131 is connected to the sleeve body, the piston body and the sleeve body are slidably connected, the cavity surrounded by the piston body and the sleeve body is filled with spring damping fluid, the sleeve body is fixedly connected to the second bearing outer ring, the second bearing outer ring is connected to the second bearing inner ring through the second rolling element, the second bearing inner ring is fixedly connected to the second connecting section, a third bolt hole is provided on the second connecting section, a fourth bolt hole is provided on the track plate 140, and the ballastless track further includes a second bolt, the second bolt passes through the third bolt hole and the fourth bolt hole to fix the spring sleeve 133 to the track plate 140.

[0049] The concrete column 120 is formed by prefabrication. During prefabrication, concrete can be poured into a steel pipe. In other embodiments, the concrete column 120 can be formed by on-site pouring.

[0050] Specifically, the concrete column 120 has four rectangular mounting surfaces, the mounting surfaces have a certain angle with the vertical direction, and the second bolt holes are opened on the mounting surfaces.

[0051] The ballastless track further includes a bolt plate 150 , one side of which is fixedly connected to the concrete column 120 , and the other side of which is fixedly connected to the track lower foundation 110 .

[0052] like Figure 5 and Figure 6 As shown, the bolt pad 150 is L-shaped.

[0053] The ballastless track further includes a rail support 160 , which is disposed on the track plate 140 for supporting the rails.

[0054] The ballastless track further includes a displacement sensor 170, which is used to detect the expansion and contraction adjustment amount of the steel spring 131. When the cumulative deformation of the track lower foundation 110 exceeds the maximum expansion and contraction adjustment amount of the steel spring 131, the spring damper 130 is taken out, the concrete column 120 is replaced, the concrete column 120 is reinstalled at the corresponding position of the embedded sleeve 141, and a new spring damper 130 is installed accordingly.

[0055] The ballastless track further includes an insulating waterproof cover plate 180 , which is disposed above the embedded sleeve 141 and is used to protect the spring damper 130 and the displacement sensor 170 inside the embedded sleeve 141 .

[0056] During construction, the track plate 140 and the concrete column 120 can be prefabricated in the factory, and the second bolt hole can be reserved on the concrete column 120, and the embedded sleeve 141 and the embedded sleeve 142 can be set on the track plate 140, and the fourth bolt hole can be reserved in the embedded sleeve 142. Then, during installation at the construction site, the concrete column 120 is first installed on the track lower foundation 110 through the bolt pad 150, and then the track plate 140 is lifted by the hydraulic jack, and the spring damper 130 is installed in the embedded sleeve 141 and the embedded sleeve 142, and the spring damper 130 is fixedly connected to the concrete column 120. When all the spring dampers 130 are placed, the jack is removed, and the track plate 140 is supported by the spring damper 130.

[0057] When the cumulative deformation of the track lower foundation 110 approaches the maximum telescopic adjustment amount of the spring damper 130, first use a jack to lift the track plate 140, unscrew and remove the first bolt and the second bolt, then remove the spring damper 130, move the track plate 140, remove the concrete column 120 on the track lower foundation 110, reinstall the concrete column at the corresponding position of the embedded sleeve 141 of the track plate 140, reinstall the track plate 140 and install a new spring damper. During the entire maintenance and remediation process, there is no need to chisel the track plate 140, the construction is quick and convenient, and the efficiency of on-site maintenance and construction of the engineering department is greatly improved.

[0058] When the roadbed is deformed by settlement and the active fault zone is dislocated, the track lower foundation 110 is prone to vertical, longitudinal and lateral deformation. Before the track lower foundation 110 is deformed, the track plate 140 has a good structural smoothness. As the track lower foundation 110 is deformed vertically, longitudinally and laterally, the track plate 140 structure is damaged, and the track smoothness is affected. The track needs to be adjusted to adapt to the deformation of the lower foundation to ensure the track smoothness.

[0059] refer to Fig.11 and Fig.12 , Fig.11 1 is a schematic structural diagram of a ballastless track in an embodiment of the present invention in which a vertical deformation occurs in the track lower foundation 110. Fig.12 1 is a schematic diagram comparing the ballastless track in the embodiment of the present invention before and after the vertical deformation adjustment of the track lower foundation 110. When vertical deformation such as active fault zone dislocation occurs, the ballastless track produces a large height adjustment amount (refer to Fig.11 and Fig.12), at this time, the concrete column 120 sinks together with the track lower foundation 110, and the spring damper 130 installed at the corresponding position begins to produce adaptive telescopic displacement (refer to Fig.12 ), reduce the impact of the lower foundation deformation on the track plate 140 structure, and ensure track smoothness and driving safety.

[0060] refer to Fig.13 , Fig.14 , Fig.15 and Fig.16 , Fig.13 1 is a schematic structural diagram of a ballastless track in an embodiment of the present invention in which a track lower foundation 110 undergoes longitudinal deformation. Fig.14 1 is a schematic structural diagram of a ballastless track in an embodiment of the present invention in which a lateral deformation occurs in a track lower foundation 110. Fig.15 1 is a schematic diagram comparing the ballastless track in the embodiment of the present invention before and after the longitudinal deformation of the track lower foundation 110 is adjusted. Fig.16 1 is a schematic diagram comparing the ballastless track in the embodiment of the present invention before and after the lateral deformation adjustment of the track lower foundation 110. When longitudinal and lateral deformations such as active fault zone dislocation occur, the ballastless track structure produces a large horizontal adjustment amount ( Fig.13 , 14 At this time, the concrete column 120 undergoes corresponding longitudinal and lateral displacements along with the track lower foundation 110, and the steel spring 131 installed at the corresponding position begins to produce adaptive horizontal telescopic displacement ( Fig.15 , 16 ), effectively realizing the self-adaptation to the deformation of the lower foundation, reducing the influence of the deformation of the lower foundation on the track plate 140, and ensuring the track smoothness and driving safety.

[0061] Compared with the prior art, the present invention has the following advantages:

[0062] Firstly, the track plate 140 and the concrete column 120 in the ballastless track can be prefabricated in a factory, with high production and installation quality, and the spring damper 130 is easy to replace, which can improve the efficiency of maintenance.

[0063] Secondly, the spring damper 130 has a large vertical, lateral and longitudinal displacement adjustment amount, which can adapt to the large deformation of the lower track foundation 110 in various directions and ensure the good geometric shape of the track structure.

[0064] Again, there is spring damping fluid inside the limit spring damper 130, which provides a buffering and vibration reduction effect during the normal operation stage of the track structure and when the lower track foundation 110 is deformed, thereby improving the safety and comfort of driving.

[0065] Thirdly, a displacement sensor 170 is installed at the steel spring 131 in the spring damper 130 to transmit the displacement and expansion of the steel spring 131 in real time, thereby effectively improving the work efficiency in the operation and maintenance stage.

[0066] The above description is only a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any changes or modifications made by a person skilled in the art in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A ballastless track, characterized in that: It includes a track lower foundation, a concrete column, a spring damper and a track plate, the track lower foundation is fixedly connected to the concrete column, the concrete column is connected to one end of the spring damper, the other end of the spring damper is connected to the track plate, one end of the spring damper is hinged to the concrete column, and the other end of the spring damper is hinged to the track plate, the spring damper includes a steel spring, a spring piston and a spring sleeve, one end of the spring piston is arranged in the spring sleeve, and one end of the spring piston is slidably connected to the spring sleeve, the other end of the spring piston is hinged to the concrete column, the steel spring is arranged in the spring sleeve, one end of the steel spring is connected to one end of the spring piston, and the other end of the steel spring is connected to the spring sleeve, the cavity surrounded by the spring piston and the spring sleeve is filled with spring damping fluid, the spring sleeve is hinged to the track plate, and the spring damper is tilted relative to the track plate.

2. The ballastless track according to claim 1, characterized in that: It also includes an embedded sleeve, which is embedded in the track plate and arranged perpendicular to the track plate. The concrete column is arranged in the embedded sleeve, and the spring damper passes through the wall of the embedded sleeve and is connected to the track plate.

3. The ballastless track according to claim 2, characterized in that: It also includes an embedded sleeve, which is embedded in the track plate and communicated with the embedded sleeve. The spring damper is partially arranged in the embedded sleeve, and the other end of the spring damper passes through the tube wall of the embedded sleeve and is connected to the track plate.

4. The ballastless track according to claim 3, characterized in that: The embedded sleeve extends from the intersection of the embedded sleeve and the embedded sleeve in a direction away from the lower foundation of the track.

5. The ballastless track according to claim 3, characterized in that: The number of the embedded sleeves in each track plate is four, each embedded sleeve corresponds to four embedded sleeves, the four embedded sleeves are evenly distributed around the embedded sleeve, and one spring damper is arranged in one embedded sleeve.

6. The ballastless track according to claim 1, characterized in that: The spring piston comprises a piston body, a first bearing outer ring, a first rolling body, a first bearing inner ring and a first connecting section, one end of the piston body is arranged in the spring sleeve, the other end of the piston body is fixedly connected to the first bearing outer ring, the first bearing outer ring is connected to the first bearing inner ring through the first rolling body, the first bearing inner ring is fixedly connected to the first connecting section, a first bolt hole is provided on the first connecting section, a second bolt hole is provided on the concrete column, and the ballastless track further comprises a first bolt, the first bolt passes through the first bolt hole and the second bolt hole to fix the other end of the spring piston to the concrete column; The spring sleeve comprises a sleeve body, a second bearing outer ring, a second rolling element, a second bearing inner ring and a second connecting section, the steel spring is arranged in the sleeve body, one end of the steel spring is connected to one end of the piston body, and the other end of the steel spring is connected to the sleeve body, the piston body and the sleeve body are slidably connected, and the cavity surrounded by the piston body and the sleeve body is filled with spring damping fluid, the sleeve body is fixedly connected to the second bearing outer ring, the second bearing outer ring is connected to the second bearing inner ring through the second rolling element, the second bearing inner ring is fixedly connected to the second connecting section, a third bolt hole is provided on the second connecting section, a fourth bolt hole is provided on the track plate, and the ballastless track also comprises a second bolt, and the second bolt passes through the third bolt hole and the fourth bolt hole to fix the spring sleeve to the track plate.

7. The ballastless track according to claim 1, characterized in that: It also includes a displacement sensor, which is used to detect the expansion and contraction adjustment amount of the steel spring.

8. The ballastless track according to claim 1, characterized in that: It also includes a bolt pad, one side of which is fixedly connected to the concrete column, and the other side of which is fixedly connected to the lower foundation of the track.

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