Prefabricated track plate and vibration reduction track

Abstract

According to the prefabricated track plate and the vibration reduction track, due to the fact that the prefabricated track plate comprises the track plate body part and the track plate lower protruding part which are integrally formed, the counter weight of the prefabricated track plate can be increased through the design of the track plate lower protruding part, and the natural vibration frequency of the prefabricated track plate is reduced; and therefore, the vibration reduction effect of the whole vibration reduction rail system is improved. Moreover, when the prefabricated track plate is stressed, the bending moment of the two ends in the width direction is small, the bending moment of the middle part of the plate is maximum, and the track plate lower convex part is formed, so that the thickness of the two ends in the width direction of the prefabricated track plate is smaller than that of the middle part of the plate, and the structural strength of the prefabricated track plate can be greatly improved. Besides, due to the fact that a pair of strip-shaped grooves are formed below the two sides of the track plate body part, when the prefabricated track plate is placed on a lower foundation, a pair of grooves with lateral openings are formed between the prefabricated track plate and the lower foundation, lifting of the prefabricated track plate can be conveniently achieved through the grooves, and therefore vibration isolation components can be conveniently installed.

Description

Technical Field

[0001] This utility model belongs to the technical field of track components, specifically relating to a prefabricated track slab and a vibration-damping track. Background Technology

[0002] Currently, urban rail transit uses two main types of track beds: cast-in-place track beds and precast track beds. Precast track beds typically involve only the lower foundation being cast on-site during track construction, while the track slabs are precast slabs, manufactured in a factory and transported to the construction site for direct installation. Using precast track slabs significantly improves construction efficiency and enhances track geometric accuracy, thus gaining increasing application.

[0003] While some prefabricated track slabs exist on the market, they still have some shortcomings. Some are ordinary prefabricated track slabs, such as those used on viaducts, primarily designed for use with motor sensors, lacking vibration damping capabilities and incompatible with vibration damping components. Other prefabricated track slabs can be installed with vibration damping components, but their applicability is limited, or installation and maintenance are inconvenient. For example, prefabricated track slabs used with vibration damping pads have a roughly flat lower surface and are typically made quite thick and heavy to consider vibration damping performance and structural strength, making them inconvenient to handle and lay during on-site assembly. Furthermore, they are difficult to use with other types of vibration damping components, such as vibration isolators. Vibration isolator installation requires at least two lifting of the track slab; because the lower surface of the prefabricated track slab used with vibration damping pads is flat, it is inconvenient to lift it after it is laid on the foundation, thus making it unsuitable for vibration isolator installation. The prefabricated track slabs used in conjunction with vibration isolators usually completely obscure the vibration isolators after installation, making it difficult to conveniently and intuitively inspect and replace them during later operation and maintenance. Utility Model Content

[0004] This utility model is designed to solve the above-mentioned problems, and aims to provide a prefabricated track slab that can be easily adapted to various track vibration isolation components, has better vibration reduction effect, and is more convenient for construction and maintenance. The technical solution adopted by this utility model is as follows:

[0005] This utility model provides a prefabricated track slab, which has the following technical features: a track slab main body, which is flat; a track slab lower protrusion, which protrudes downward from the middle of the lower surface of the track slab main body, so that strip-shaped grooves are formed on both sides of the lower part of the track slab main body, the extension direction of the strip-shaped grooves being consistent with the length direction of the track slab main body, for setting vibration isolation components; and a plurality of support platforms, which are respectively disposed on the upper surface of the track slab main body for supporting steel rails.

[0006] The prefabricated track slab provided by this utility model may also have the following technical features: the lower convex part of the track slab is cuboid in shape; the cross-section of the middle part of the prefabricated track slab in the length direction is T-shaped; the two lower surfaces of the main body of the track slab are respectively the top surfaces of the strip-shaped grooves on both sides; and the top surfaces of the grooves are planes perpendicular to the thickness direction of the main body of the track slab.

[0007] The prefabricated track slab provided by this utility model may also have the following technical features: the prefabricated track slab is a concrete slab, and both ends of the prefabricated track slab have boss mating holes for setting limiting bosses to limit the prefabricated track slab.

[0008] The prefabricated track slab provided by this utility model may also have the following technical features: the prefabricated track slab is used to be installed in a tunnel, the thickness of both ends of the main body of the track slab in the width direction is less than the thickness of the middle part, and a mating surface inclined relative to the width direction is formed at the lower part of both ends of the track slab in the width direction for mating with the arc-shaped bottom surface of the tunnel.

[0009] This utility model provides a vibration-damping track, which has the following technical features: a lower foundation; multiple prefabricated track slabs laid sequentially on the lower foundation; and multiple vibration isolation components disposed between the lower foundation and the prefabricated track slabs, wherein the multiple prefabricated track slabs are all the aforementioned prefabricated track slabs, and the vibration isolation components are disposed in the strip-shaped grooves.

[0010] The vibration-damping track provided by this utility model may also have the following technical features: the vibration isolation component is a spring vibration isolator, the diameter of the spring vibration isolator is smaller than the groove width of the strip-shaped groove, and the prefabricated track slab also has: multiple vibration isolator inspection holes that penetrate along the thickness direction of the prefabricated track slab and are located above the strip-shaped groove, and the spring vibration isolator is disposed below the vibration isolator inspection holes.

[0011] The vibration-damping track provided by this utility model may also have the following technical features, wherein the prefabricated track slab further comprises: a vibration isolator support member, which is disposed at the bottom of the vibration isolator inspection hole and is used to abut against the upper edge of the spring vibration isolator.

[0012] The vibration-damping track provided by this utility model may also have the following technical features, wherein the vibration isolation component is a composite resin bag or an elastic vibration-damping pad, and the width of the vibration isolation component is less than or equal to the groove width of the strip-shaped groove.

[0013] The vibration-damping track provided by this utility model may also have the following technical features: the lower base has a base drainage ditch, the width of the lower protrusion of the track plate is smaller than the width of the base drainage ditch, and the lower end of the lower protrusion of the track plate is embedded in the base drainage ditch.

[0014] The vibration-damping track provided by this utility model may also have the following technical features: the lower base has a base drainage ditch, and the prefabricated track slab has one or more drainage ditch inspection holes in the middle, which are through the thickness direction of the prefabricated track slab and located above the base drainage ditch.

[0015] Functions and effects of utility models

[0016] According to the prefabricated track slab and vibration-damping track provided by this utility model, since the prefabricated track slab includes an integrally formed main body and a lower protrusion, the design of the lower protrusion increases the counterweight of the prefabricated track slab itself, reducing its natural frequency and thus improving the vibration reduction effect of the entire vibration-damping track system. Furthermore, when the prefabricated track slab is under stress, the bending moment at both ends in the width direction is smaller, while the bending moment in the middle of the slab is the largest. Due to the formation of the lower protrusion, the thickness at both ends in the width direction of the prefabricated track slab is smaller than the thickness in the middle, thus making it better suited for such stress conditions and significantly improving the structural strength of the prefabricated track slab. In addition, since a pair of strip-shaped grooves are formed on the lower sides of the main body of the track slab, when the prefabricated track slab is placed on the lower foundation, a pair of laterally open grooves will be formed between them. These grooves can be used to easily lift the prefabricated track slab, thereby facilitating the installation of vibration isolation components. Attached Figure Description

[0017] Figure 1 This is a cross-sectional schematic diagram of the prefabricated track slab in Embodiment 1 of this utility model;

[0018] Figure 2 This is a cross-sectional schematic diagram of the vibration-damping track in Embodiment 1 of this utility model;

[0019] Figure 3 This is a top view schematic diagram of the vibration-damping track in Embodiment 1 of this utility model;

[0020] Figure 4 This is a cross-sectional schematic diagram of the vibration-damping track section structure in Embodiment 1 of this utility model;

[0021] Figure 5 This is a cross-sectional schematic diagram of the vibration-damping track in Embodiment 2 of this utility model;

[0022] Figure 6 This is a cross-sectional schematic diagram of the prefabricated track slab in Embodiment 2 of this utility model;

[0023] Figure 7 This is a cross-sectional schematic diagram of the vibration-damping track in Embodiment 3 of this utility model;

[0024] Figure 8 This is a cross-sectional schematic diagram of the vibration-damping track in Embodiment 4 of this utility model.

[0025] Figure label:

[0026] Vibration-damping track 100; prefabricated track slab 10; track slab main body 11; strip groove 112; vibration isolator inspection hole 113; vibration isolator support 114; side opening 115; drainage ditch inspection hole 116; mating surface 117; lower protrusion of track slab 12; bearing platform 13; boss mating groove 14; vibration-damping component 20; elastic element 21; height adjustment shim 22; horizontal limiter 23; lower foundation 30; base drainage ditch 31; limiter mounting hole 32; limiter boss 40; rail 50. Detailed Implementation

[0027] To make the technical means, creative features, objectives and effects of this utility model easy to understand, the prefabricated track slab of this utility model will be specifically described below in conjunction with the embodiments and accompanying drawings.

[0028] <Example 1>

[0029] Figure 1 This is a cross-sectional schematic diagram of the prefabricated track slab in this embodiment.

[0030] like Figure 1 As shown, the precast track slab 10 includes an integrally formed track slab body 11, a lower protrusion 12 of the track slab, and multiple support platforms 13, all made of concrete.

[0031] The main body 11 of the track slab is flat and plate-shaped. In this embodiment, it is roughly rectangular and plate-shaped, similar in structure and size to the track slab in the prior art.

[0032] The lower protrusion 12 of the track slab protrudes downward from the middle of the lower surface (middle in the width direction) of the track slab body 11. In this embodiment, the lower protrusion 12 of the track slab is also roughly rectangular, with a width and thickness smaller than the width and thickness of the track slab body 11, respectively. The center lines of the two in the width direction are aligned in the vertical direction, making the cross-section of the prefabricated track slab 10 in the middle of the length direction roughly T-shaped. The thickness of the prefabricated track slab 10 in the middle of the width direction is greater than the thickness of its two ends in the width direction. A pair of strip-shaped grooves 112 are formed on the lower sides of the track slab body 11 and on the outer sides of the lower protrusion 12 of the track slab. The pair of strip-shaped grooves 112 are the same size and are mirror-symmetrically arranged along the center line in the width direction of the prefabricated track slab 10. The cross-section of the strip-shaped grooves 112 in the length direction of the prefabricated track slab 10 is roughly a flat rectangle.

[0033] The lower surfaces on both sides of the track plate main body 11 are the top surfaces 112a of the two side strip-shaped grooves 112, and the two side surfaces in the width direction of the lower protrusion 12 of the track plate are the side surfaces 112b of the two side strip-shaped grooves 112. In this embodiment, the top surfaces 112a and the side surfaces 112b are both planar and perpendicular to each other, and the top surfaces 112a are also parallel to the upper surface of the track plate main body 11 and the lower surface of the lower protrusion 12 of the track plate.

[0034] Multiple support platforms 13 (also called short sleepers) are respectively disposed on the upper surface of the main body of the track slab 11 and arranged in two rows along the length of the main body of the track slab 11. The multiple support platforms 13 in each row are equally spaced and are used to support two rails. In this embodiment, the groove side 112b of the strip groove 112 is approximately located below the middle of the support platform 13 on the corresponding side.

[0035] Figure 2 This is a cross-sectional schematic diagram of the vibration-damping track in this embodiment. Figure 3 This is a top view of the vibration-damping track in this embodiment.

[0036] like Figure 2 and Figure 3 As shown, the vibration damping track 100 includes multiple prefabricated track slabs 10, multiple vibration isolation components 20, a lower foundation 30, multiple limiting bosses 40, two steel rails 50, and multiple fasteners (not shown in the figure).

[0037] Multiple prefabricated track slabs 10 are laid on top of the lower foundation 30 and arranged sequentially. The length direction of each prefabricated track slab 10 is basically consistent with the extension direction of the track. One end of the length direction of two adjacent prefabricated track slabs 10 is connected, and each end of the length direction of the prefabricated track slab 10 has a boss mating groove 14. The boss mating grooves 14 at the facing ends of two adjacent prefabricated track slabs 10 can be spliced ​​to form a boss setting hole with a rounded rectangular cross-section. A limiting boss 40 matching the shape is set in the boss setting hole. In addition, an elastic pad (not shown in the figure) is also provided between the limiting boss 40 and the side of the boss mating groove 14, thereby playing a horizontal limiting role for the two adjacent prefabricated track slabs 10.

[0038] like Figure 2 As shown, when positioned above the lower foundation 30, the strip-shaped groove 112 creates elongated lateral openings 115 between the two sides of the track slab body 11 and the lower foundation 30. Understandably, when the prefabricated track slab 10 is placed directly on the upper surface of the lower foundation 30 before installing the spring isolators, the presence of the strip-shaped groove 112 will also create similar lateral openings between the track slab body 11 and the lower foundation 30, allowing for the lifting of the prefabricated track slab 10 using these lateral openings and the strip-shaped groove 112.

[0039] Each prefabricated track slab 10 is mounted above the lower foundation 30 by multiple vibration isolation components 20. In this embodiment, the vibration-damping track 100 is mounted in a section with special vibration reduction requirements (the highest level among the current multi-level vibration reduction requirements), and the vibration isolation component 20 is a spring vibration isolator.

[0040] Figure 4 This is a cross-sectional schematic diagram of the vibration-damping track section structure in this embodiment.

[0041] like Figure 4 As shown, the vibration isolation component 20 (spring vibration isolator) may include, for example, an elastic element 21, a height adjustment shim 22, and a horizontal limiter 23. The elastic element 21 may employ a corresponding structure from the prior art, for example, it may include a slidably fitted upper and lower housing, and a rubber spring disposed within the fitted upper and lower housings. Both ends of the rubber spring may be fixed to the upper and lower housings respectively by corresponding fasteners. The bottom of the lower housing may have a limiter fitting hole, and the upper surface of the lower foundation 30 may have a limiter mounting hole 32. The horizontal limiter 23 is cylindrical, with one end embedded in the limiter fitting hole at the bottom of the lower housing and the other end embedded in the limiter mounting hole 32 on the lower foundation 30, thereby horizontally limiting the vibration isolation component 20.

[0042] As can be seen, the vibration isolation component 20 is set in the strip groove 112. The groove width of the strip groove 112 (the groove depth when viewed from the side opening 115) is greater than the diameter (or width) of the vibration isolation component 20. The groove height of the strip groove 112 corresponds to the height of the vibration isolation component 20. The groove height allows the lower surface of the prefabricated track slab 10 to not contact the lower foundation 30.

[0043] Furthermore, to facilitate the installation and maintenance of the spring isolators, the prefabricated track slab 10 of this embodiment also includes multiple isolator inspection holes 113 and multiple isolator supports 114. The isolator inspection holes 113 are located between two adjacent support platforms 13 and near the outer edge of the support platform 13. Each isolator inspection hole 113 is a circular through-hole extending along the thickness direction of the prefabricated track slab 10, with a diameter smaller than the diameter of the upper end of the elastic element 21. The isolator supports 114 are located at the bottom of the isolator inspection holes 113 and are metal parts embedded in the prefabricated track slab 10, serving as load-bearing components at the top of the spring isolators. Each isolator support 114 includes at least one annular portion for abutting against the upper edge of the elastic element 21.

[0044] Since the vibration isolation component 20 can also be inspected through the lateral opening 115 between the prefabricated track slab 10 and the lower foundation 30, the prefabricated track slab 10 may optionally not have a vibration isolator inspection hole 113.

[0045] The lower foundation 30 is a concrete base, typically cast on-site during track construction. A base drainage ditch 31 extending along the track extension direction is formed in the center of the upper surface of the lower foundation 30. In this embodiment, the width of the lower protrusion 12 of the track slab is greater than the width of the base drainage ditch 31. Furthermore, a drainage ditch inspection hole 116 is provided in the center of the precast track slab 10; this hole is a circular or square through-hole that extends along the thickness direction of the precast track slab 10 and is located above the base drainage ditch 31. Optionally, the drainage ditch inspection hole 116 has a gradually changing diameter, with the largest diameter at the upper surface of the track slab body 11.

[0046] Two steel rails 50 are respectively supported on two rows of support platforms 13. Each support platform 13 is equipped with fasteners, and the two steel rails 50 are fixed by multiple fasteners.

[0047] In this embodiment, each prefabricated track slab 10 has a length of 3570mm, a width of 2700mm, and a thickness of 340mm in the middle. The width of the lower protrusion 12 of the track slab is 1604mm, and the groove width of the groove 112 is 548mm.

[0048] Each prefabricated track slab 10 is provided with twelve support platforms 13, that is, six in each row, and the distance between the center lines of two adjacent support platforms 13 in each row is 600mm. The distance between the two support platforms 13 closest to the end and the outer end face of the corresponding end is 285mm.

[0049] Each precast track slab 10 is provided with six vibration isolator inspection holes 113, i.e., three in each row, spaced apart between two adjacent support platforms 13 and close to the outer edge of the support platform 13. The distance from the center of each vibration isolator inspection hole 113 to the center line 10A (center line in the width direction) of the precast track slab 10 is 940mm. Correspondingly, each precast track slab 10 is equipped with six vibration isolation components 20 (spring vibration isolators). Each precast track slab 10 is provided with one drainage ditch inspection hole 116, with an upper diameter of 300mm and a lower diameter of 280mm.

[0050] The groove width of the boss mating groove 14 is 820mm, the distance between the bottom surfaces of the two opposite boss mating grooves 14 is 404mm, and an elastic pad with a thickness of 8mm is set in it.

[0051] Functions and effects of Example 1

[0052] According to the prefabricated track slab and vibration-damping track provided in this embodiment, since the prefabricated track slab includes an integrally formed main body and a lower protrusion, the design of the lower protrusion increases the counterweight of the prefabricated track slab itself, reducing its natural frequency and thus improving the vibration reduction effect of the entire vibration-damping track system. Furthermore, when the prefabricated track slab is under stress, the bending moment at both ends in the width direction is smaller, while the bending moment in the middle of the slab is the largest. Due to the formation of the lower protrusion, the thickness at both ends of the prefabricated track slab in the width direction is smaller than the thickness in the middle of the slab, thus making it better suited to such stress conditions and significantly improving the structural strength of the prefabricated track slab. In addition, since a pair of strip-shaped grooves are formed on the lower sides of the main body of the track slab, when the prefabricated track slab is placed on the lower foundation, a pair of laterally open grooves will be formed between them. These grooves can be used to easily lift the prefabricated track slab, thereby facilitating the installation of vibration isolation components.

[0053] In this embodiment, the prefabricated track slab is used in conjunction with spring vibration isolators. When constructing such a vibration-damping track, the prefabricated track slab is usually laid on the lower foundation first, and then raised to a certain height for the installation of the spring vibration isolators. As mentioned above, since a pair of strip-shaped mounting slots are provided, the lateral openings formed by them can be used to conveniently raise the prefabricated track slab, achieving efficient installation of the vibration isolators. In this way, it is not necessary to set up additional structural components for raising on the prefabricated track slab, and the manufacturing of the prefabricated track slab is also more convenient, with a relatively smaller number of components.

[0054] Furthermore, the lower surfaces on both sides of the main body of the track slab are the top surfaces of the strip-shaped grooves on both sides. The top surfaces of the grooves are planes perpendicular to the thickness direction of the slab, which makes the prefabricated track slab more stable when using the strip-shaped grooves to lift it.

[0055] Furthermore, the prefabricated track slab also has multiple vibration isolator inspection holes. A metal vibration isolator support is pre-embedded at the bottom of each vibration isolator inspection hole. Therefore, the vibration isolator support can abut against the spring vibration isolator to achieve load bearing, so that the vibration reduction track system as a whole can withstand greater stress. Moreover, the vibration isolator inspection holes can be used to conveniently check the condition of each spring vibration isolator during the installation of the vibration isolator and in subsequent operation and maintenance.

[0056] In this embodiment, the width of the lower protrusion of the track slab is greater than the width of the base drainage ditch. Therefore, during construction, the prefabricated track slab can be laid on the lower foundation first. The lower protrusion of the track slab will be supported on the lower foundation on both sides of the base drainage ditch and will not be embedded in the base drainage ditch. This allows a groove with a sufficiently high lateral opening to be formed between the main body of the track slab and the lower foundation, which facilitates the lifting of the track slab using the lateral opening and groove.

[0057] In this embodiment, the vibration isolation component is a spring vibration isolator. As long as its overall dimensions are compatible with the vibration isolator support and the groove height of the strip groove, it is acceptable. Various types and structures of spring vibration isolators can be used, such as rubber spring vibration isolators with or without a shell, or steel spring vibration isolators. Therefore, the prefabricated track slab has a wide range of applications.

[0058] <Example 2>

[0059] This embodiment provides a prefabricated track slab and a vibration-damping track. In this embodiment, the same symbols are assigned to the same constituent elements as in Embodiment 1, and the corresponding descriptions are omitted.

[0060] Figure 5 This is a cross-sectional schematic diagram of the vibration-damping track in this embodiment. Figure 6 This is a cross-sectional schematic diagram of the prefabricated track slab in this embodiment.

[0061] like Figure 5 and Figure 6 As shown, compared with Embodiment 1, the difference lies in that the vibration-damping track 100 in this embodiment is set in the tunnel, and the end structure of the prefabricated track slab 10 is different in order to adapt to the arc-shaped bottom surface of the tunnel. Specifically, the lower part of both ends of the track slab main body 11 in the width direction is notched to form a pair of mating surfaces 117. From the middle of the track slab main body 11 to its two ends in the width direction, the mating surfaces 117 are inclined upward relative to the width direction.

[0062] Due to the presence of mating surface 117, the groove width of strip groove 112 is smaller than that in Embodiment 1. In this embodiment, its groove width is 348mm, but it is still significantly larger than the diameter of vibration isolation component 20 (spring vibration isolator).

[0063] Because of the mating surface 117, when the prefabricated track slab 10 of this embodiment is laid on the lower foundation 30 in the tunnel during construction, a channel with sufficient height will be formed between the mating surface 117 and the arc-shaped bottom surface of the tunnel. Lifting tools or lifting equipment can use this channel to extend into the strip groove 112, thereby making it easier to carry out construction in the tunnel.

[0064] In this embodiment, the other structures are the same as in Embodiment 1, so they will not be described again.

[0065] <Example 3>

[0066] This embodiment provides a prefabricated track slab and a vibration-damping track. In this embodiment, the same symbols are assigned to the same constituent elements as in Embodiment 1, and the corresponding descriptions are omitted.

[0067] Figure 7 This is a cross-sectional schematic diagram of the vibration-damping track in this embodiment.

[0068] like Figure 7 As shown, the difference from Embodiment 1 is that a different vibration isolation component 20' is used in this embodiment.

[0069] Specifically, in this embodiment, the vibration damping track 100 is installed in an area with high vibration damping requirements, which are slightly lower than those of the vibration damping track 100 in Embodiment 1. The vibration isolation component 20' used is a strip-shaped elastic vibration damping pad. The width of the elastic vibration damping pad is less than or equal to the groove width of the strip-shaped groove 112, and the thickness of the elastic vibration damping pad is less than or equal to the groove height of the strip-shaped groove 112. The elastic vibration damping pad can be any type of existing vibration damping pad, such as a solid vibration damping pad or a foamed vibration damping pad.

[0070] Since the installation of elastic vibration damping pads on the track does not require multiple lifting of the track slab during construction, in this embodiment of the prefabricated track slab 10, the width of the lower protrusion 12 of the track slab is smaller than the width of the base drainage ditch 31. After construction, the lower end of the lower protrusion 12 of the track slab is embedded in the base drainage ditch 31. Because the elastic vibration damping pads are relatively thin, this structural design allows for a relatively higher height of the lower protrusion 12 of the track slab, thereby increasing the weight of the lower counterweight and the thickness of the middle part of the slab, enabling the prefabricated track slab to maintain the technical effect described in Embodiment 1.

[0071] In this embodiment, the other structures are the same as in Embodiment 1, so they will not be described again.

[0072] <Example 4>

[0073] This embodiment provides a prefabricated track slab and a vibration-damping track. In this embodiment, the same symbols are assigned to the same constituent elements as in Embodiment 1, and the corresponding descriptions are omitted.

[0074] Figure 8 This is a cross-sectional schematic diagram of the vibration-damping track in this embodiment.

[0075] like Figure 8 As shown, the difference from Embodiment 1 is that a different vibration isolation component 20 is used in this embodiment.

[0076] Specifically, in this embodiment, the vibration-damping track 100 is installed in areas with moderate or general vibration reduction requirements, which are lower than those of the vibration-damping track 100 in Embodiment 2. The vibration isolation component 20” is a high-strength composite resin bag filled in the strip-shaped groove 112. In an alternative, cement asphalt mortar (CA mortar) or self-compacting concrete can also be used to fill the strip-shaped groove 112 to achieve a certain vibration reduction effect and adjust the elevation of the precast track slab 10.

[0077] Similar to Embodiment 2, in this embodiment, the width of the lower protrusion 12 of the track slab is smaller than the width of the base drainage ditch 31. After construction is completed, the lower end of the lower protrusion 12 of the track slab is embedded in the base drainage ditch 31.

[0078] In this embodiment, the other structures are the same as in Embodiment 1, so they will not be described again.

[0079] As can be seen from the above embodiments, the T-shaped prefabricated track slab 10 has a wide range of applications and can be easily and directly adapted to different types of vibration isolation components. It can meet the assembly requirements of track structures in special vibration reduction, high-level vibration reduction, medium and general vibration reduction sections of rail transit, and has the advantages of more convenient construction, better vibration reduction effect and lower operation and maintenance costs.

[0080] The above embodiments are merely illustrative of specific implementations of this utility model, and the utility model is not limited to the scope of the above embodiments. Those skilled in the art should understand that the utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are only for illustrating the principles of the utility model. Various changes and modifications can be made to the utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the utility model as claimed. The scope of protection of this utility model is defined by the appended claims and their equivalents.

[0081] For example, the above embodiment 1 provides the size design of the prefabricated track slab and the number of bearing platforms and vibration isolators in a single slab. In an alternative, the prefabricated track slab can also adopt other sizes and be equipped with a corresponding number of bearing platforms and vibration isolators. For example, the length of the prefabricated track slab can also be greater than or equal to 5000mm, and more than eight bearing platforms and more than eight vibration isolators can be installed on it.

Claims

1. A prefabricated track slab, characterized in that, include: The main body of the track slab is flat. The lower protrusion of the track slab protrudes downward from the middle of the lower surface of the track slab body, so that strip-shaped grooves are formed on both sides of the lower part of the track slab body. The extending direction of the strip-shaped grooves is consistent with the length direction of the track slab body, and is used to install vibration isolation components. as well as Multiple support platforms are respectively set on the upper surface of the track slab body to support the steel rails.

2. The prefabricated track slab according to claim 1, characterized in that: in, The lower convex part of the track slab is rectangular in shape. The cross-section of the prefabricated track slab at the middle of its length is T-shaped. The two lower surfaces of the main body of the track slab are the top surfaces of the strip-shaped grooves on both sides, and the top surfaces of the grooves are planes perpendicular to the thickness direction of the main body of the track slab.

3. The prefabricated track slab according to claim 1, characterized in that: in, The prefabricated track slab is a concrete slab. The prefabricated track slab has boss mating holes at both ends for setting limiting bosses to limit the prefabricated track slab.

4. The prefabricated track slab according to claim 1, characterized in that: in, The prefabricated track slabs are used for installation in tunnels. The thickness at both ends of the main body of the track slab in the width direction is less than the thickness in the middle, and mating surfaces inclined relative to the width direction are formed at the lower part of both ends of the track slab for mating with the arc-shaped bottom surface of the tunnel.

5. A vibration-damping track, characterized in that, include: Substructure; Multiple prefabricated track slabs are laid sequentially on the lower foundation; as well as Multiple vibration isolation components are installed between the lower foundation and the prefabricated track slab. The multiple prefabricated track slabs mentioned herein are the prefabricated track slabs as described in any one of claims 1-4. The vibration isolation component is disposed in the strip-shaped groove.

6. The vibration-damping track according to claim 5, characterized in that: in, The vibration isolation component is a spring vibration isolator. The diameter of the spring isolator is smaller than the width of the strip-shaped groove. The prefabricated track slab also has: Multiple vibration isolator inspection holes extend along the thickness direction of the prefabricated track slab and are located above the strip-shaped groove. The spring isolator is located below the inspection hole of the isolator.

7. The vibration-damping track according to claim 6, characterized in that: in, The prefabricated track slab also has: A vibration isolator support is provided at the bottom of the vibration isolator inspection hole and is used to abut against the upper edge of the spring vibration isolator.

8. The vibration-damping track according to claim 5, characterized in that: in, The vibration isolation component is a composite resin bag or an elastic vibration damping pad. The width of the vibration isolation component is less than or equal to the width of the strip-shaped groove.

9. The vibration-damping track according to claim 8, characterized in that: in, The lower foundation has a base drainage ditch. The width of the lower protrusion of the track slab is smaller than the width of the base drainage ditch. The lower end of the protruding part of the track slab is embedded in the drainage ditch of the base.

10. The vibration-damping track according to claim 5, characterized in that: in, The lower foundation has a base drainage ditch. The prefabricated track slab has one or more drainage ditch inspection holes in the middle, which extend along the thickness direction of the prefabricated track slab and are located above the base drainage ditch.

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