Ballastless track for passenger and freight collinear railway and construction method of ballastless track

Abstract

The invention discloses a ballastless track for a passenger and freight collinear railway and a construction method of the ballastless track, and relates to the field of rail transit. The ballastless track comprises a steel rail, a fastener system and a track plate, wherein the steel rail is mounted on the track plate through the fastener system; the ballastless track further comprises a rigidity self-adjusting device and a base plate. The rigidity self-adjusting device has a folded state and a reset state, in the folded state, the connecting rod telescopic mechanisms are pressed, the linkage assembly is connected with all the connecting rod telescopic mechanisms to implement contraction, and the first connecting side and the second connecting side jointly act on the second elastic piece to compress and store force. And in the reset state, the second elastic piece is configured to elastically act on the first connecting side and the second connecting side to recover, so that the connecting rod telescopic mechanisms can be switched into expansion action, and the linkage assembly is connected with all the connecting rod telescopic mechanisms to expand and reset. The invention has the advantages of simple structural design and low engineering manufacturing cost, can well consider the use requirements of stability, comfort and bearing durability, and can be adaptively applied to passenger and freight collinear railways.

Description

Technical Field

[0001] The present invention relates to the field of rail transportation, and in particular to a ballastless track for passenger and freight co-line railway and a construction method thereof. Background Art

[0002] Ballastless track has also been widely used in the construction of passenger and freight railways due to its high stability, low maintenance cost and good track geometry retention ability. However, the ballastless track of passenger and freight railways faces the contradiction of stiffness adaptation during operation. On the one hand, the passenger car has a light axle weight and a fast running speed. In order to ensure the stability and comfort of driving, the track stiffness should not be too large; on the other hand, the freight car has a heavy axle weight and strong impact force. In order to ensure the bearing capacity and durability of the track, the track is required to have a large stiffness. The stiffness of the ballastless track mainly comes from the fastener system, filling layer and rubber cushion layer. Therefore, how to reasonably match the stiffness of the ballastless track to meet the needs of mixed passenger and freight transportation has become an urgent problem to be solved.

[0003] In the related art, a pad and a track include a main body and at least two stiffness providing groups, so as to adapt to the requirements of track stiffness under different operating conditions. However, in actual application, the pad is complex in design and has a high engineering cost. It can ensure the supporting performance of the expected stiffness, but the stiffness cannot be adaptive, and cannot meet the use requirements of ballastless track for passenger and freight railways in terms of stability, comfort and load-bearing durability during operation.

[0004] In order to solve the problem of adaptive stiffness of passenger-freight railway tracks, it is necessary to propose a ballastless track for passenger-freight railways with automatically adjustable stiffness. Summary of the invention

[0005] In order to solve the technical problems raised by the above-mentioned background technology, the present invention provides a ballastless track for passenger-freight co-line railway, comprising a steel rail, a fastener system and a track plate, wherein the steel rail is mounted on the track plate through the fastener system; as a preferred technical solution, the ballastless track further comprises a self-adjusting device for stiffness and a base plate, wherein the base plate is suitable for connecting with the ground side, the track plate is arranged at intervals at the upper end of the base plate, and the self-adjusting device for stiffness is arranged in groups of at least one pair, wherein the pair of self-adjusting devices for stiffness are arranged at intervals at the bottom end of the track plate along the width direction of the track plate;

[0006] Any rigidity self-adjusting device comprises at least two connecting rod telescopic mechanisms, a linkage assembly and at least one second elastic member, wherein the connecting rod telescopic mechanism comprises a support arm member and a first connection side and a second connection side rotatably configured at both ends of the support arm member, the first connection side is rotatably configured with the track plate, the second connection side is rotatably configured with the base plate, and at least two support arm members of the connecting rod telescopic mechanisms are connected through the linkage assembly; one end of the second elastic member is connected to the first connection side, and the other end of the second elastic member is connected to the second connection side;

[0007] The rigidity self-adjusting device has a folding state and a reset state; in the folding state, the connecting rod telescopic mechanism is compressed, the linkage assembly connects all the connecting rod telescopic mechanisms to implement contraction, and the first connecting side and the second connecting side act together to compress the second elastic member to store force;

[0008] In the reset state, the second elastic member is configured to elastically act on the first connection side and the second connection side to restore, so that the connecting rod telescopic mechanism can be switched to an expansion action, and the linkage assembly connects all the connecting rod telescopic mechanisms to expand and reset.

[0009] As a preferred technical solution, the linkage assembly includes a third connecting shaft, a fourth connecting shaft and a first elastic member; the third connecting shaft and the fourth connecting shaft are arranged in parallel and spaced apart, one end of the first elastic member is fixedly connected to the third connecting shaft, and the other end of the first elastic member is fixedly connected to the third connecting shaft; the support arm component includes a left support arm and a right support arm, the third connecting shaft is rotatably connected to the left support arm of the connecting rod telescopic mechanism, and the fourth connecting shaft is rotatably connected to the right support arm of the connecting rod telescopic mechanism.

[0010] As a preferred technical solution, at least two of the connecting rod telescopic mechanisms are arranged at intervals in the horizontal direction, one end of the third connecting shaft is rotationally connected to the left support arm of one of the connecting rod telescopic mechanisms, the other end of the third connecting shaft is rotationally connected to the left support arm of the other connecting rod telescopic mechanism, one end of the fourth connecting shaft is rotationally connected to the right support arm of one of the connecting rod telescopic mechanisms, and the other end of the fourth connecting shaft is rotationally connected to the right support arm of the other connecting rod telescopic mechanism; the left support arm of the other connecting rod telescopic mechanism is rotationally connected to the middle section of the third connecting shaft, and the right support arm of the other connecting rod telescopic mechanism is rotationally connected to the middle section of the fourth connecting shaft; and / or

[0011] The support arm is configured as a scissor-fork connecting rod, and the scissor-fork connecting rod is configured as two connecting rod members connected in rotation; the left support arm and the right support arm are symmetrically arranged.

[0012] As a preferred technical solution, the left support arm and the right support arm are configured as a parallelogram mechanism with a connection node rotationally configured, the first elastic member is extended in the horizontal direction, and the second elastic member is extended in the height direction.

[0013] As a preferred technical solution, the stiffness self-adjusting device also includes a top plate and a bottom plate, the connecting rod telescopic mechanism is rotatably arranged between the top plate and the bottom plate, the first connecting side is configured with a first connecting shaft, the first connecting shaft is rotatably arranged in the top plate, the top plate and the track plate are fixedly connected, the second connecting side is configured with a second connecting shaft, the second connecting shaft is rotatably arranged in the bottom plate, and the bottom plate and the base plate are fixedly connected.

[0014] As a preferred technical solution, the stiffness self-adjusting device also includes an elastic buffer and connecting parts. The elastic buffer is arranged between the top plate and the track plate, and the top plate, the elastic buffer and the track plate are fixedly connected by a plurality of the connecting parts. The elastic buffer is arranged between the bottom plate and the base plate, and the bottom plate, the elastic buffer and the base plate are fixedly connected by a plurality of the connecting parts.

[0015] As a preferred technical solution, the track plate and the base plate are jointly constructed with a plurality of semi-enclosed groove structures, wherein the groove structures are adjacently arranged at the lateral outer edge ends of the track plate; and the stiffness self-adjusting device is installed in the groove structures.

[0016] As a preferred technical solution, the ballastless track further includes a filling layer, which is filled and connected in an assembly space formed by the track plate, the self-adjusting device for stiffness and the base plate, and the self-adjusting device for stiffness is symmetrically arranged on both sides of the extending direction of the filling layer; the filling layer and the groove structure are arranged to avoid each other;

[0017] At least two of the link telescopic mechanisms are arranged at intervals along the width direction of the track plate.

[0018] As a preferred technical solution, a pair of the stiffness self-adjusting devices are symmetrically arranged on the ballastless track, the projection of the track plate on the horizontal plane covers the projection of a pair of the stiffness self-adjusting devices on the horizontal plane, and the projection area of ​​the base plate on the horizontal plane is larger than the projection area of ​​the track plate on the horizontal plane.

[0019] The present invention also provides a method for constructing a ballastless track for a passenger-freight railway, comprising the following steps:

[0020] S1: Prefabricate rails, fastener systems, track plates, and self-adjusting devices, and transport them to the construction site;

[0021] S2: Construct the survey plane and elevation control network of the track engineering, and carry out the construction layout of the base plate and prefabricated track plate;

[0022] S3: According to the construction layout and positioning of the base plate, the base plate is cast on site;

[0023] S4: Install the self-adjusting device on the base plate, and adjust the connecting rod telescopic mechanism of the self-adjusting device according to the construction layout and positioning of the track plate so that the installation height of the self-adjusting device reaches the preset height range;

[0024] S5: Install the prefabricated track plate above the stiffness self-adjusting device;

[0025] S6: constructing a filling layer between the track plate and the base plate to form a ballastless track;

[0026] S7: Install the fastening system and rails on the precast track slabs.

[0027] The technical solution provided by the present invention has the following advantages:

[0028] The ballastless track for passenger-freight co-line railway provided by the present invention comprises a rail, a fastener system and a track plate, wherein the rail is mounted on the track plate through the fastener system; the ballastless track further comprises a self-adjusting rigidity device and a base plate, wherein the base plate is suitable for connecting with the ground side, the track plate is arranged at intervals at the upper end of the base plate, and at least one pair of self-adjusting rigidity devices are arranged in groups, wherein a pair of self-adjusting rigidity devices are arranged at intervals at the lower end of the track plate along the width direction of the track plate; any self-adjusting rigidity device comprises at least two connecting rod telescopic mechanisms, a linkage assembly and at least one second elastic member, wherein the connecting rod telescopic mechanism comprises a support arm member and a first connection side and a second connection side rotatably arranged at both ends of the support arm member, wherein the first connection side is rotatably arranged with the track plate, and the second connection side is rotatably arranged with the base plate, and the support arm members of at least two connecting rod telescopic mechanisms are connected through the linkage assembly; one end of the second elastic member is connected with the first connection side, and the other end of the second elastic member is connected with the second connection side.

[0029] The passenger-freight co-line railway of this structure uses a ballastless track, wherein the rails, fastener system and track plate serve as the supporting foundation on the upper side of the ballastless track, and the stiffness self-adjusting device and the base plate serve as the supporting foundation on the lower side of the ballastless track; the stiffness self-adjusting device has a folding state and a reset state, in which the connecting rod telescopic mechanism is under pressure, the linkage assembly connects all the connecting rod telescopic mechanisms to implement contraction, and the first connecting side and the second connecting side act together to compress the second elastic member to store force; in the reset state, the second elastic member is configured to elastically act on the first connecting side and the second connecting side to restore, so that the connecting rod telescopic mechanism can be switched to an expansion action, and the linkage assembly connects all the connecting rod telescopic mechanisms to expand and reset; in the loading stage, the ballastless track is operated by the track plate The pressure-acting stiffness self-adjusting device puts the stiffness self-adjusting device in a folded state, and the supporting arm component, the second elastic member and the linkage assembly of the connecting rod telescopic mechanism jointly support and limit the contraction of the connecting rod telescopic mechanism, thereby improving the load-bearing durability of the ballastless track through the grouped stiffness self-adjusting devices to meet the freight demand; the overall stiffness self-adjusting device links all the connecting rod telescopic mechanisms through the linkage assembly, and enables the second elastic member to elastically match the dynamic changes of all the connecting rod telescopic mechanisms, thereby improving the comfort and stability of the ballastless track through the grouped stiffness self-adjusting devices to meet the passenger demand; after the ballastless track is loaded and exited, the stiffness self-adjusting device automatically returns to its original position before the folded state. The ballastless track provided in this embodiment has a simple structural design and low engineering manufacturing cost, can well take into account the use requirements of stability, comfort and load-bearing durability, and can be adapted for use in passenger and freight co-line railways. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 A three-dimensional schematic diagram of a ballastless track provided by the present invention;

[0032] Figure 2 A schematic structural diagram of a ballastless track provided by the present invention from a side view;

[0033] Figure 3 A schematic diagram of the structure of the self-adjusting device for stiffness in a ballastless track provided by the present invention;

[0034] Figure 4 A schematic diagram of the structure of a side view of a self-adjusting device for stiffness in a ballastless track provided by the present invention;

[0035] Figure 5A schematic diagram of the structure of the bottom plate of the ballastless track provided by the present invention;

[0036] Figure 6 A schematic diagram of the structure of a track plate in a ballastless track provided by the present invention;

[0037] Figure 7 A schematic diagram of the structure of a base plate in a ballastless track provided by the present invention;

[0038] Description of reference numerals:

[0039] 1-rail; 2-fastener system; 3-track plate; 301-assembly groove; 302-first bolt hole; 303-connecting through hole; 4-filling layer; 5-rigidity self-adjusting device; 501-elastic buffer; 502-top plate; 503-bottom plate; 504-vertical through hole; 505-horizontal through hole; 506-connecting rod telescopic mechanism; 5061-scissor fork connecting rod; 5062-first connecting axis; 5063-second connecting axis; 5064-third connecting axis; 5065-fourth connecting axis; 507-first elastic member; 508-second elastic member; 509-connecting part; 6-base plate; 601-base slot; 602-second bolt hole. DETAILED DESCRIPTION

[0040] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0044] Example 1

[0045] This embodiment provides a ballastless track for a passenger-freight railway. Figure 1 and Figure 2 The ballastless track includes a rail 1, a fastener system 2 and a track plate 3. The rail 1 is installed on the track plate 3 through the fastener system 2. The rail 1, the fastener system 2 and the track plate 3 serve as the supporting foundation on the upper side of the ballastless track. Two rails 1 are provided, and the track plate 3 is provided as a plate structure; the two rails 1 extend along the length direction of the track plate 3 and are spaced apart from each other, and any rail 1 is fixedly assembled on the upper end of the track plate 3 through the fastener system 2.

[0046] In some embodiments, the rail 1 is a seamless long rail 1 to avoid train vibration caused by too many joints.

[0047] In this embodiment, see Figures 1 to 7 The ballastless track further includes a self-adjusting device 5 and a base plate 6. The base plate 6 is suitable for connecting with the ground side. The self-adjusting device 5 and the base plate 6 serve as the supporting foundation of the lower side of the ballastless track. The track plate 3 is arranged at intervals on the upper end of the base plate 6. The self-adjusting device 5 is arranged in a pair or more in a group. Any pair of the self-adjusting devices 5 is arranged at intervals at the bottom end of the track plate 3 along the width direction of the track plate 3.

[0048] In a specific embodiment, see Figure 3 and Figure 4 The stiffness self-adjusting device 5 includes two connecting rod telescopic mechanisms 506, a linkage assembly and one or more second elastic members 508. The connecting rod telescopic mechanism 506 has a support arm component and a first connecting side and a second connecting side rotatably configured at both ends of the support arm component. The first connecting side is rotatably configured with the track plate 3, and the second connecting side is rotatably configured with the base plate 6. The support arm components of at least two connecting rod telescopic mechanisms 506 are connected by a linkage assembly; one end of the second elastic member 508 is connected to the first connecting side, and the other end of the second elastic member 508 is connected to the second connecting side.

[0049] In the specific working process, the rigidity self-adjusting device 5 has a folding state and a reset state. In the folding state, the connecting rod telescopic mechanism 506 is compressed, and the linkage assembly connects all the connecting rod telescopic mechanisms 506 to implement contraction, and the first connection side and the second connection side act together to compress the second elastic member 508 to store force; in the reset state, the second elastic member 508 is configured to elastically act on the first connection side and the second connection side to restore, so that the connecting rod telescopic mechanism 506 can switch to an expansion action, and the linkage assembly connects all the connecting rod telescopic mechanisms 506 to expand and reset. In this embodiment, the first connection side is set as the upper end rotation side of the support arm component, and the second connection side is set as the lower end rotation side of the support arm component.

[0050] The ballastless track provided in this embodiment has the track plate 3 exerting pressure on the self-adjusting device 5 to put the self-adjusting device 5 in a folded state during the loading stage, and the supporting arm component of the connecting rod telescopic mechanism 506, the second elastic member 508 and the linkage assembly jointly support and limit the contraction of the connecting rod telescopic mechanism 506, thereby improving the load-bearing durability of the ballastless track through the self-adjusting devices 5 arranged in groups to meet the freight demand; the overall self-adjusting device 5 links all the connecting rod telescopic mechanisms 506 through the linkage assembly, and enables the second elastic member 508 to flexibly match the dynamic changes of all the connecting rod telescopic mechanisms 506, thereby improving the comfort and stability of the ballastless track through the self-adjusting devices 5 arranged in groups to meet the passenger transport demand; after the ballastless track is loaded and exits, the self-adjusting device 5 automatically returns to its original position before the folded state.

[0051] As an exemplary embodiment, see Figure 3 and Figure 4The linkage assembly includes a third connecting shaft 5064, a fourth connecting shaft 5065 and a first elastic member 507; the third connecting shaft 5064 and the fourth connecting shaft 5065 are arranged in parallel and spaced apart, one end of the first elastic member 507 is fixedly connected to the third connecting shaft 5064, and the other end of the first elastic member 507 is fixedly connected to the third connecting shaft 5064; the support arm component includes a left support arm and a right support arm, the third connecting shaft 5064 is rotatably connected to the left support arm of the connecting rod telescopic mechanism 506, and the fourth connecting shaft 5065 is rotatably connected to the right support arm of the connecting rod telescopic mechanism 506. In this arrangement, the left support arm of the connecting rod telescopic mechanism 506 is linked to the left support arm of the connecting rod telescopic mechanism 506 through the third connecting shaft 5064, the right support arm of the connecting rod telescopic mechanism 506 is linked to the right support arm of the connecting rod telescopic mechanism 506 through the fourth connecting shaft 5065, and the third connecting shaft 5064 and the fourth connecting shaft 5065 are elastically linked to each other through the first elastic member 507; in the loading stage of the ballastless track, the stiffness self-adjusting device 5 enters the folding state, the connecting rod telescopic mechanism 506 is compressed and deformed, and the first connecting side and the second connecting side work together to compress the second elastic member 508 to store force; because the left support arm is connected to the third connecting shaft 5064, the right support arm is connected to the fourth connecting shaft 5065, and the first elastic member 507 is connected to the left support arm 5064, the right support arm is connected to the fourth connecting shaft 5065, and the first elastic member 507 is connected to the right support arm 5065. Connected between the third connecting shaft 5064 and the fourth connecting shaft 5065, the connecting rod telescopic mechanism 506 is compressed and deformed so that the third connecting shaft 5064 and the fourth connecting shaft 5065 are relatively far apart, the first elastic member 507 is pulled and stored, and the connecting rod telescopic mechanism 506 is partially shared by the second elastic member 508 and partially shared by the first elastic member 507 under compression, and the rest is transmitted to the base plate 6; after the ballastless track is loaded and withdrawn, the second elastic member 508 and the first elastic member 507 work together to link the assembly, the support arm component and all the connecting rod telescopic mechanisms 506 to return the stiffness self-adjusting device 5 to its original position. The stiffness of the first elastic member 507 and the second elastic member 508 can be adaptively changed and adjusted as the stiffness self-adjusting device 5 is compressed, which is conducive to reducing track vibration, so that the ballastless track equipped with the stiffness self-adjusting device 5 can adapt to the comfort and stability requirements of trains with different axle loads.

[0052] As a preferred embodiment, the first elastic member 507 is extended in the horizontal direction, and the second elastic member 508 is extended in the height direction. This arrangement is conducive to assembling the overall stiffness adaptive device, and the force in the height direction can be partially converted into the force in the horizontal direction. The horizontally extending first elastic member 507 and the vertically extending second elastic member 508 can effectively limit the longitudinal, transverse and vertical deformation of the track structure through the connecting rod telescopic mechanism 506 and the linkage assembly, thereby ensuring the integrity and stability of the track structure.

[0053] In some assembly embodiments, the second elastic member 508 and the first elastic member 507 with different elastic coefficients can be configured to adjust the dynamic change range of the connecting rod telescopic mechanism 506 in the stiffness self-adjusting device 5 to meet the working dimension chain of actual application.

[0054] In some assembly embodiments, the second elastic member 508 and the first elastic member 507 may be configured with different elastic preload forces, which can adjust the support of the stiffness self-adjusting device 5 to the track plate 3 and its own initial working position.

[0055] As a preferred embodiment, two connecting rod telescopic mechanisms 506 are provided, and the two connecting rod telescopic mechanisms 506 are arranged at intervals in the horizontal direction, one end of the third connecting shaft 5064 is rotatably connected to the left support arm of one of the connecting rod telescopic mechanisms 506, and the other end of the third connecting shaft 5064 is rotatably connected to the left support arm of the other connecting rod telescopic mechanism 506, one end of the fourth connecting shaft 5065 is rotatably connected to the right support arm of one of the connecting rod telescopic mechanisms 506, and the other end of the fourth connecting shaft 5065 is rotatably connected to the right support arm of the other connecting rod telescopic mechanism 506;

[0056] As a further embodiment, three or more connecting rod telescopic mechanisms 506 are provided, and all the connecting rod telescopic mechanisms 506 are arranged at intervals in the horizontal direction. The two connecting rod telescopic mechanisms 506 at the front and rear ends are assembled on the two ends of the third connecting shaft 5064 and the fourth connecting shaft 5065, and the left support arm of the other connecting rod telescopic mechanism 506 is rotatably connected to the middle section of the third connecting shaft 5064, and the right support arm of the other connecting rod telescopic mechanism 506 is rotatably connected to the middle section of the fourth connecting shaft 5065.

[0057] In a specific embodiment, see Figure 3 The support arm is configured as a scissor fork connecting rod 5061, and the scissor fork connecting rod 5061 is configured as two connecting rod members connected in rotation; the left support arm and the right support arm are symmetrically arranged.

[0058] As a preferred embodiment, the left support arm and the right support arm are configured as a parallelogram mechanism with a connection node rotation configuration. This arrangement can make the overall connecting rod telescopic mechanism 506 transmit force consistently, reduce the risk of stress concentration, and extend the service life of the structure.

[0059] As a preferred embodiment, see Figure 3 and Figure 4 The stiffness self-adjusting device 5 also includes a top plate 502 and a bottom plate 503, a connecting rod telescopic mechanism 506 is rotatably arranged between the top plate 502 and the bottom plate 503, a first connecting side is provided with a first connecting shaft 5062, the first connecting shaft 5062 is rotatably arranged in the top plate 502, the top plate 502 and the track plate 3 are fixedly connected, a second connecting side is provided with a second connecting shaft 5063, the second connecting shaft 5063 is rotatably arranged in the bottom plate 503, the bottom plate 503 and the base plate 6 are fixedly connected.

[0060] Two connecting rod telescopic mechanisms 506 are provided, and the two connecting rod telescopic mechanisms 506 are rotatably connected to the end of the first connecting shaft 5062 penetrating the top plate 502 and the end of the second connecting shaft 5063 penetrating the bottom plate 503 respectively.

[0061] For a configuration in which more than three connecting rod telescopic mechanisms 506 are provided, the front and rear two connecting rod telescopic mechanisms 506 are respectively rotatably connected with the end of the first connecting shaft 5062 passing through the top plate 502 and the end of the second connecting shaft 5063 passing through the bottom plate 503, the upper nodes of the other connecting rod telescopic mechanisms 506 are respectively rotatably connected with the first connecting shaft 5062, and the lower nodes of the other connecting rod telescopic mechanisms 506 are respectively rotatably connected with the second connecting shaft 5063.

[0062] In some embodiments, the front and rear link telescopic mechanisms 506 have the same structural dimensions, and one or more intermediate side link telescopic mechanisms 506 between the front and rear link telescopic mechanisms 506 may have smaller structural dimensions than the front and rear link telescopic mechanisms 506 .

[0063] In a specific embodiment, one first elastic member 507 is provided, and two second elastic members 508 are provided, and the two second elastic members 508 are symmetrically arranged at intervals on both sides of the first elastic member 507. In other embodiments, two or more first elastic members 507 are provided, and the second elastic members 508 are arranged vertically in pairs between the front and rear connecting rod telescopic mechanisms 506.

[0064] As a preferred embodiment, see Figures 2 to 4 The stiffness self-adjusting device 5 also includes an elastic buffer 501 and a connecting part 509. The elastic buffer 501 is arranged between the top plate 502 and the track plate 3. The top plate 502, the elastic buffer 501 and the track plate 3 are fixedly connected by multiple connecting parts 509. The elastic buffer 501 is arranged between the bottom plate 503 and the base plate 6. The bottom plate 503, the elastic buffer 501 and the base plate 6 are fixedly connected by multiple connecting parts 509.

[0065] In some assembly embodiments, see Figure 5 A plurality of vertical through holes 504 are provided on the bottom plate 503, and the plurality of vertical through holes 504 are respectively used to penetrate and assemble a plurality of connecting parts 509 to dock and fix the bottom plate 503 and the elastic buffer 501; the connecting parts 509 can be set as bolt assemblies.

[0066] In some assembly embodiments, a horizontal through hole 505 is provided on the top plate 502 , and the horizontal through hole 505 is used to pass and assemble the first connecting shaft 5062 ; a horizontal through hole 505 is provided on the bottom plate 503 , and the horizontal through hole 505 is used to pass and assemble the second connecting shaft 5063 .

[0067] In some assembly embodiments, the top plate 502 and the bottom plate 503 have the same structural dimensions, and the positions of the openings of the top plate 502 and the bottom plate 503 for the connecting parts 509 to pass through are also the same.

[0068] In some assembly embodiments, see Figure 6 The track plate 3 is provided with a plurality of connecting through holes 303, and the plurality of connecting through holes 303 are respectively used to penetrate and assemble a plurality of connecting parts 509 to dock and fix the top plate 502 and the elastic buffer 501; the connecting parts 509 can be set as bolt assemblies.

[0069] As a preferred embodiment, see Figure 1 and Figure 2 A pair of self-adjusting rigidity devices 5 are symmetrically arranged on the ballastless track, the projection of the track plate 3 on the horizontal plane covers the projection of the pair of self-adjusting rigidity devices 5 on the horizontal plane, and the projection area of ​​the base plate 6 on the horizontal plane is larger than the projection area of ​​the track plate 3 on the horizontal plane. The base plate 6 constitutes an integral support for the structure thereon to transfer the force to the ground side.

[0070] The ballastless track provided in this embodiment provides elastic buffering through the elastic buffer 501, the first elastic member 507 and the second elastic member 508. On the one hand, it can prevent the rigid contact between the stiffness self-adjusting device 5 and the track plate 3 and the base plate 6 to cause damage to the track structure. On the other hand, it can provide elasticity for the track structure, reduce the vibration of the track, and improve the comfort and stability of the train operation.

[0071] In a specific implementation, the elastic buffer 501 is made of rubber material, and the top plate 502 and the bottom plate 503 are made of steel.

[0072] In some embodiments, the second elastic member 508 is made of a steel spring or a rubber spring, the upper portion of the second elastic member 508 is connected to the top plate 502, and the lower portion of the second elastic member 508 is connected to the bottom plate 503, and is in a non-deformed state. As the axle weight of the freight train increases, the connecting rod telescopic mechanism 506 is vertically compressed, and the second elastic member 508 provides vertical stiffness for the track, thereby increasing the track stiffness.

[0073] In some embodiments, the first elastic member 507 is made of a steel spring or a rubber spring. On the one hand, it provides support for the scissors-type connecting rod to prevent the scissors-type connecting rod from undergoing large deformation. On the other hand, it provides stiffness for the stiffness self-adjusting device 5. As the connecting rod telescopic mechanism 506 is compressed and deformed, the stiffness of the stiffness self-adjusting device 5 increases, thereby adapting to the weight of the freight train.

[0074] For the assembly of the stiffness self-adjusting device 5 in the ballastless track:

[0075] In a specific embodiment, the track plate 3 and the base plate 6 are jointly constructed with a plurality of semi-enclosed groove structures, which are adjacently arranged at the lateral outer edge of the track plate 3; and the stiffness self-adjusting device 5 is installed in the groove structure. Figure 6 and Figure 7 A mounting groove 301 is provided on the lower end surface of the track plate 3, and a base groove 601 is provided on the upper end surface of the base plate 6. The mounting groove 301, the base groove 601 and the spacing space between the track plate 3 and the base plate 6 together constitute a groove structure.

[0076] In this embodiment, see Figure 1 and Figure 2 The ballastless track also includes a filling layer 4, which is filled and connected in the assembly space formed by the track plate 3, the self-adjusting device 5 and the base plate 6. The self-adjusting device 5 is symmetrically arranged on both sides of the extending direction of the filling layer 4; the filling layer 4 and the groove structure are arranged to avoid each other. The track plate 3 is supported by the filling layer 4 and the plurality of self-adjusting devices 5, and the force is transmitted to the base plate 6.

[0077] The two connecting rod telescopic mechanisms 506 at the front and rear ends are spaced apart along the width direction of the track plate 3. This arrangement, on the one hand, is conducive to all the connecting rod telescopic mechanisms 506 supporting the track plate 3, thereby improving the stability of the ballastless track along the width direction of the track plate 3; on the other hand, it can avoid the folding movement of the connecting rod telescopic mechanism 506 interfering with the filling layer 4, thereby ensuring a reliable area of ​​the filling layer 4 to abut and support the track.

[0078] In some embodiments, the filling layer 4 may be a cement emulsified asphalt mortar layer or a self-compacting concrete. To further reduce the vibration of the track, the filling layer 4 may also be a rubber cushion layer.

[0079] In some embodiments, see Figure 6 The track plate 3 is a prefabricated structure, and assembly grooves 301 for installing the stiffness self-adjusting device 5 are reserved on the left and right sides of the track plate 3. The assembly grooves 301 are provided with connecting through holes 303 for installing the connecting parts 509; a plurality of first bolt holes 302 for installing the fastener system 2 are reserved on the track plate 3.

[0080] In some embodiments, see Figure 7 The base plate 6 can be a cast-in-place structure or a prefabricated structure. A slot is provided at the installation position of the self-adjusting rigidity device 5, and a second bolt hole 602 for installing the self-adjusting rigidity device 5 is provided at the corresponding position of the slot.

[0081] The ballastless track provided in this embodiment has a simple structural design and low engineering manufacturing cost, and can well take into account the use requirements of stability and comfort as well as durable load-bearing, and can be adapted for application in passenger and freight railways.

[0082] Example 2

[0083] This embodiment provides a method for constructing a ballastless track for a passenger-freight railway, comprising the following steps:

[0084] S1: Prefabricate rails 1, fastener systems 2, track plates 3, and self-adjusting devices 5, and transport them to the construction site;

[0085] S2: construct the rail engineering survey plane and elevation control network, and carry out the construction layout of the base plate 6 and the prefabricated track plate 3;

[0086] S3: According to the construction layout and positioning of the base plate 6, the base plate 6 is cast on site;

[0087] In the above step S3, when casting the base plate 6, a slot for installing the rigidity self-adjusting device 5 and a second bolt hole 602 should be reserved;

[0088] S4: Install the self-adjusting device 5 on the base plate 6, and adjust the connecting rod telescopic mechanism 506 of the self-adjusting device 5 according to the construction layout and positioning of the track plate 3, so that the installation height of the self-adjusting device 5 reaches a preset height range;

[0089] In the above step S4, the self-adjusting device 5 is first installed on the base plate 6 through the connecting part 509, and then the height and position of the prefabricated track plate 3 are determined according to the on-site construction layout, and the connecting rod telescopic mechanism 506 of the self-adjusting device 5 is adjusted to reach the predetermined position, and the first elastic member 507 and the second elastic member 508 are installed in the self-adjusting device 5; the spring stiffness of the first elastic member 507 and the second elastic member 508 of the self-adjusting device 5 can be determined by calculation and experiment, so as to ensure the optimal track stiffness during the operation of passenger cars and trucks; the stiffness of the self-adjusting device 5 in the initial position just meets the stiffness requirements of passenger car operation, and when the truck passes, the self-adjusting device 5 will be compressed and deformed, and under the constraint of the first elastic member 507 and the second elastic member 508, the stiffness of the self-adjusting device 5 is increased, so that the track stiffness meets the requirements of truck operation;

[0090] S5: Install the prefabricated track plate 3 above the stiffness self-adjusting device 5;

[0091] In the above step S5, after the self-adjusting device 5 is installed, the self-adjusting device 5 is connected to the track plate 3 using the connecting part 509;

[0092] S6: constructing a filling layer 4 for forming a ballastless track between the track plate 3 and the base plate 6;

[0093] In the above step S6, after adjusting the height and position of the track plate 3, a filling layer 4 is cast on site between the track plate 3 and the base plate 6. The filling layer 4 may be made of cement emulsified asphalt mortar, self-compacting concrete, or a prefabricated rubber cushion layer may be used to further reduce the vibration of the sleeper.

[0094] S7: Installing the fastener system 2 and the rail 1 on the prefabricated track slab 3;

[0095] In the above step S7, the fastener system 2 and the rail 1 are installed so that the rail 1 is fixed on the prefabricated track plate 3, and then the geometric shape of the rail 1 is fine-tuned by the fastener system 2 to meet the subsequent railway work.

[0096] The construction method provided in this embodiment has simple operation steps. A stiffness self-adjusting device 5 is set between the base plate 6 and the prefabricated track plate 3. The height of the stiffness self-adjusting device 5 is adjusted according to the positioning position of the track plate 3 by the extension and retraction of the connecting rod extension mechanism 506. Due to the use of prefabrication technology and on-site assembly construction, the construction efficiency of the ballastless track can be significantly improved, and the subsequent maintenance and repair are convenient.

[0097] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A ballastless track for a passenger-freight railway, comprising a rail (1), a fastener system (2) and a track plate (3), wherein the rail (1) is mounted on the track plate (3) via the fastener system (2); characterized in that: The ballastless track further comprises a self-adjusting rigidity device (5) and a base plate (6), wherein the base plate (6) is suitable for connecting with the ground side, the track plate (3) is arranged at intervals on the upper end of the base plate (6), and the self-adjusting rigidity device (5) is arranged in groups of at least one pair, wherein the pair of self-adjusting rigidity devices (5) are arranged at intervals on the bottom end of the track plate (3) along the width direction of the track plate (3); Any rigidity self-adjusting device (5) comprises at least two connecting rod telescopic mechanisms (506), a linkage assembly and at least one second elastic member (508), wherein the connecting rod telescopic mechanism (506) comprises a support arm component and a first connection side and a second connection side rotatably arranged at both ends of the support arm component, wherein the first connection side is rotatably arranged with the track plate (3), and the second connection side is rotatably arranged with the base plate (6), and the support arm components of at least two connecting rod telescopic mechanisms (506) are connected via the linkage assembly; one end of the second elastic member (508) is connected to the first connection side, and the other end of the second elastic member (508) is connected to the second connection side; The rigidity self-adjusting device (5) has a folding state and a reset state; in the folding state, the connecting rod telescopic mechanism (506) is compressed, the linkage assembly connects all the connecting rod telescopic mechanisms (506) to implement contraction, and the first connecting side and the second connecting side act together to compress the second elastic member (508) to store force; In the reset state, the second elastic member (508) is configured to elastically act on the first connection side and the second connection side to restore, so that the connecting rod telescopic mechanism (506) can be switched to an expansion action, and the linkage assembly connects all the connecting rod telescopic mechanisms (506) to expand and reset.

2. The ballastless track according to claim 1, characterized in that: The linkage assembly includes a third connecting shaft (5064), a fourth connecting shaft (5065) and a first elastic member (507); the third connecting shaft (5064) and the fourth connecting shaft (5065) are arranged in parallel and spaced apart, one end of the first elastic member (507) is fixedly connected to the third connecting shaft (5064), and the other end of the first elastic member (507) is fixedly connected to the third connecting shaft (5064); the support arm component includes a left support arm and a right support arm, the third connecting shaft (5064) is rotationally connected to the left support arm of the connecting rod telescopic mechanism (506), and the fourth connecting shaft (5065) is rotationally connected to the right support arm of the connecting rod telescopic mechanism (506).

3. The ballastless track according to claim 2, characterized in that: At least two of the connecting rod telescopic mechanisms (506) are arranged at intervals in the horizontal direction, one end of the third connecting shaft (5064) is rotationally connected to the left support arm of one of the connecting rod telescopic mechanisms (506), the other end of the third connecting shaft (5064) is rotationally connected to the left support arm of the other connecting rod telescopic mechanism (506), one end of the fourth connecting shaft (5065) is rotationally connected to the right support arm of one of the connecting rod telescopic mechanisms (506), and the other end of the fourth connecting shaft (5065) is rotationally connected to the right support arm of the other connecting rod telescopic mechanism (506); the left support arm of the other connecting rod telescopic mechanism (506) is rotationally connected to the middle section of the third connecting shaft (5064), and the right support arm of the other connecting rod telescopic mechanism (506) is rotationally connected to the middle section of the fourth connecting shaft (5065); and / or The support arm is configured as a scissor-fork connecting rod (5061), and the scissor-fork connecting rod (5061) is configured as two connecting rod members that are rotatably connected; the left support arm and the right support arm are symmetrically arranged.

4. The ballastless track according to claim 3, characterized in that: The left support arm and the right support arm are configured as a parallelogram mechanism with a connection node rotation configuration, the first elastic member (507) is extended in the horizontal direction, and the second elastic member (508) is extended in the height direction.

5. The ballastless track according to any one of claims 1 to 4, characterized in that: The stiffness self-adjusting device (5) also includes a top plate (502) and a bottom plate (503); the connecting rod telescopic mechanism (506) is rotatably arranged between the top plate (502) and the bottom plate (503); the first connecting side is provided with a first connecting shaft (5062); the first connecting shaft (5062) is rotatably arranged in the top plate (502); the top plate (502) and the track plate (3) are fixedly connected; the second connecting side is provided with a second connecting shaft (5063); the second connecting shaft (5063) is rotatably arranged in the bottom plate (503); the bottom plate (503) and the base plate (6) are fixedly connected.

6. The ballastless track according to claim 5, characterized in that: The stiffness self-adjusting device (5) further comprises an elastic buffer (501) and a connecting part (509); the elastic buffer (501) is arranged between the top plate (502) and the track plate (3); the top plate (502), the elastic buffer (501) and the track plate (3) are fixedly connected via a plurality of the connecting parts (509); the elastic buffer (501) is arranged between the bottom plate (503) and the base plate (6); the bottom plate (503), the elastic buffer (501) and the base plate (6) are fixedly connected via a plurality of the connecting parts (509).

7. The ballastless track according to any one of claims 1 to 4, characterized in that: The track plate (3) and the base plate (6) are jointly constructed with a plurality of semi-enclosed groove structures, wherein the groove structures are arranged adjacent to the lateral outer edge ends of the track plate (3); and the stiffness self-adjusting device (5) is installed in the groove structures.

8. The ballastless track according to claim 7, characterized in that: The ballastless track further comprises a filling layer (4), the filling layer (4) being filled and connected in an assembly space formed by the track plate (3), the self-adjusting rigidity device (5) and the base plate (6), the self-adjusting rigidity device (5) being symmetrically arranged on both sides of the extending direction of the filling layer (4); the filling layer (4) and the groove structure being arranged to avoid each other; At least two of the connecting rod telescopic mechanisms (506) are arranged at intervals along the width direction of the track plate (3).

9. The ballastless track according to claim 7, characterized in that: A pair of the self-adjusting rigidity devices (5) are symmetrically arranged on the ballastless track, the projection of the track plate (3) on the horizontal plane covers the projection of the pair of self-adjusting rigidity devices (5) on the horizontal plane, and the projection area of ​​the base plate (6) on the horizontal plane is larger than the projection area of ​​the track plate (3) on the horizontal plane.

10. A method for constructing a ballastless track for a passenger-freight railway, characterized in that: The steps include: S1: First, prefabricate the rails (1), the fastener system (2), the track plate (3), and the stiffness self-adjusting device (5), and transport them to the construction site; S2: constructing the track engineering survey plane and elevation control network, and carrying out the construction layout of the base plate (6) and the prefabricated track plate (3); S3: According to the construction layout and positioning of the base plate (6), the base plate (6) is cast on site; S4: Installing the self-adjusting rigidity device (5) on the base plate (6), and adjusting the connecting rod telescopic mechanism (506) of the self-adjusting rigidity device (5) according to the construction layout and positioning of the track plate (3) so that the installation height of the self-adjusting rigidity device (5) reaches a preset height range; S5: Installing the prefabricated track plate (3) above the stiffness self-adjusting device (5); S6: constructing a filling layer (4) for forming a ballastless track between the track plate (3) and the base plate (6); S7: Install the fastening system (2) and the rail (1) on the prefabricated track slab (3).

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