Graded sliding type continuous supporting track suitable for large-span bridge and installation method thereof

Abstract

The invention relates to the technical field of rail traffic, and aims to solve the problems that an existing embedded rail structure mainly depends on deformation of an elastic material to achieve longitudinal expansion and contraction, the expansion and contraction amount is very limited, and the embedded rail structure cannot be applied to a large-span continuous beam bridge and other line environments needing large longitudinal expansion and contraction amount. The invention provides a graded sliding type continuous supporting track suitable for a long-span bridge and an installation method of the graded sliding type continuous supporting track, the graded sliding type continuous supporting track comprises a track groove, an elastic base plate and a track are installed in the track groove, the elastic base plate continuously supports the track, and a gap between the track and the track groove is filled with an elastic material; the rail groove is formed in the sleeper, the limiting components are arranged on the two transverse sides of the rail groove and used for limiting the transverse direction and the vertical direction of the rail groove, and the rail groove can slide relative to the sleeper in the longitudinal direction. Graded sliding is adopted to combine integral sliding of components in the rail groove and deformation sliding of elastic materials in the rail groove, larger longitudinal expansion and contraction amount can be achieved, and the bridge expansion joint can adapt to a bridge with a longer span.

Description

Technical Field

[0001] The present invention relates to the field of rail transit technology, and in particular to a graded sliding continuous support track suitable for a long-span bridge and an installation method thereof. Background Art

[0002] As people's living standards improve, the vibration and noise problems of urban rail transit are increasingly affecting people's quality of life. The new embedded track structure has been widely used and recognized in domestic tram roadbeds, bridges and subway lines due to its excellent vibration and noise reduction effects, good insulation performance and low daily maintenance requirements.

[0003] However, this structure requires the provision of a U-shaped groove and the installation of an elastic pad in the U-shaped groove to continuously support the rail, and then the gap between the rail and the U-shaped groove is completely filled with elastic material to ensure the geometric position of the rail, such as a continuously supported longitudinal track structure disclosed in the Chinese utility model patent with application number CN201920433724.3. Although this design is effective, it limits the longitudinal free expansion and contraction of the rail. Since the longitudinal expansion and contraction mainly rely on the deformation of the elastic material, its expansion and contraction amount is very limited, so it cannot be applied to line environments such as large-span continuous beam bridges that require a large longitudinal expansion and contraction amount.

[0004] In recent years, the structural vibration of long-span bridges and the resulting secondary structure noise have become increasingly prominent, and new structural designs are urgently needed to improve this situation. Summary of the invention

[0005] The present invention aims to provide a graded sliding continuous support track suitable for large-span bridges and an installation method thereof, so as to solve the problem that the existing embedded track structure mainly relies on the deformation of elastic materials to achieve longitudinal expansion and contraction, and its expansion and contraction amount is very limited, and it cannot be applied to line environments such as large-span continuous beam bridges that require a large longitudinal expansion and contraction amount.

[0006] The present invention is achieved by adopting the following technical solutions:

[0007] The present invention provides a graded sliding continuous support track suitable for a long-span bridge, comprising a track groove, wherein an elastic pad and a track are installed in the track groove, wherein the elastic pad continuously supports the track, and the gap between the track and the track groove is filled with an elastic material;

[0008] The rail groove is arranged on the sleeper, and limiting components are arranged on both lateral sides of the rail groove. The limiting components are used to limit the rail groove in the lateral and vertical directions. The rail groove can slide relative to the sleeper in the longitudinal direction.

[0009] As the preferred technical solution:

[0010] The material of the rail groove can be steel, cast iron, fiberglass, etc., the track can be a steel rail, and the elastic material can be a polymer material, such as polyurethane, rubber, etc.

[0011] As the preferred technical solution:

[0012] A clamping plate is fixedly mounted on the rail sleeper, the rail groove is arranged on the top surface of the clamping plate, and the rail groove can slide relative to the clamping plate in the longitudinal direction.

[0013] As the preferred technical solution:

[0014] The card plate is made of hard material, such as glass fiber reinforced nylon, mirror stainless steel and the like.

[0015] As the preferred technical solution:

[0016] The top surface of the clamping plate is provided with a friction structure.

[0017] The friction structure is used to change and adjust the friction force between the clamping plate and the rail groove to achieve different sliding amounts.

[0018] As the preferred technical solution:

[0019] The friction structure is a groove or a protrusion arranged on the top surface of the clamping plate.

[0020] As the preferred technical solution:

[0021] The friction structure may also be a friction material arranged on the top surface of the card plate.

[0022] As the preferred technical solution:

[0023] The clamping plate is fixed on the sleeper by clamping, bonding, bolting or embedding on the top surface of the sleeper.

[0024] As the preferred technical solution:

[0025] When the clamping plate is fixed to the sleeper by clamping, the clamping plate adopts a U-shaped clamping plate, and the U-shaped clamping plate includes a panel and end plates connected to its two longitudinal ends. The panel is attached to the top surface of the sleeper, and the two end plates are respectively attached to the two longitudinal ends of the sleeper. The panel and the end plates are an integrally formed structural part.

[0026] As the preferred technical solution:

[0027] When the clamping plate is fixed on the sleeper by being embedded in the top surface of the sleeper, a mounting groove is provided on the sleeper, and the clamping plate is embedded in the mounting groove, so that the clamping plate is fixedly mounted on the sleeper.

[0028] As the preferred technical solution:

[0029] The rail groove has crimping parts formed on both lateral sides thereof, and the limiting component adopts an assembled structure or an integrally formed structure.

[0030] As the preferred technical solution:

[0031] The rail groove comprises a groove bottom plate and groove side plates connected to two lateral sides thereof, the two lateral sides of the groove bottom plate respectively extend out from the corresponding groove side plates, and the extended parts are the crimping parts.

[0032] As the preferred technical solution:

[0033] A reinforcing rib plate is connected between the groove side plate and the crimping portion, and the reinforcing rib plate can be a triangular rib plate, a square rib plate, etc.

[0034] As the preferred technical solution:

[0035] The rail groove can be an integral welded part or a casting, or can be assembled and combined using standard profiles.

[0036] As the preferred technical solution:

[0037] The limiting component includes a vertical limiting piece and a transverse limiting piece, the transverse limiting piece abuts against the transverse sides of the rail groove and the clamping plate, the vertical limiting piece is located on the top surface of the transverse limiting piece, and one end of the vertical limiting piece is crimped onto the crimping portion to vertically limit the rail groove, and the vertical limiting piece and the transverse limiting piece are connected to the sleeper via a connecting piece.

[0038] As the preferred technical solution:

[0039] The vertical limiting piece is made of spring steel spring.

[0040] As the preferred technical solution:

[0041] But it is not limited to spring steel springs, other components with certain strength and elasticity can also be used.

[0042] As the preferred technical solution:

[0043] The connecting piece is a bolt, and a bolt hole is opened on the sleeper. The rod of the bolt passes through the spring steel spring piece and the through hole on the transverse limit piece in sequence, and then is screwed into the bolt hole on the sleeper. The head of the bolt is limited to the top surface of the spring steel spring piece.

[0044] As the preferred technical solution:

[0045] The limiting component includes an integrally formed buckling plate, on which a crimping groove is provided, the crimping portion of the rail groove and the side of the clamping plate are both limited in the crimping groove, and the buckling plate is connected to the sleeper through a connecting piece.

[0046] As the preferred technical solution:

[0047] The connecting piece is a bolt, a bolt hole is opened on the sleeper, the rod of the bolt passes through the buckling plate and is screwed into the bolt hole on the sleeper, and the head of the bolt is limited to the top surface of the buckling plate.

[0048] The present invention further provides an installation method for a graded sliding continuous support track suitable for a long-span bridge, when the foundation is a cast-in-place concrete structure, comprising the following steps:

[0049] S1: Arrange the sleepers at standard spacing outside the site, and then install the pallets on the sleepers;

[0050] S2: Install the rail groove on the pallet and fix and limit it by limiting components;

[0051] S3: Use tooling to connect the rail and the rail groove into a whole;

[0052] S4: hoist the sleepers, pallets, rail grooves and tracks as a whole to the installation location and initially lay them in place;

[0053] S5: After fine-tuning the track position, the sleepers are fixed in place by the track position and the ballast bed concrete is poured;

[0054] S5: Remove the tooling, install the elastic pad in the track, install the track in the track groove and perform fine adjustment, and then pour the elastic material in the track groove;

[0055] When the foundation is a prefabricated slab structure, the following steps are included:

[0056] S1: hoist the track slab, lay it in place initially, and install the pallet on the sleepers of the track slab;

[0057] S2: Install the rail groove on the pallet and fix and limit it by limiting components;

[0058] S3: Install elastic pads in the track, install the track in the track groove and fine-tune the track, and then pour elastic material in the track groove.

[0059] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0060] 1. The present invention adopts the idea of ​​graded sliding, combines the sliding of the components in the track groove as a whole with the deformation sliding of the elastic material in the track groove, and provides a graded sliding continuous support track suitable for large-span bridges.

[0061] 2. The graded sliding continuous support track of the present invention adopts two-stage sliding. The first-stage sliding is that the rail groove and the rails in the groove and other components slide along the longitudinal direction of the sleeper as a whole, and different sliding amounts are achieved by changing the friction between the clamping plate and the rail groove. The second-stage sliding is that the elastic material in the rail groove is deformed, and the track slides longitudinally relative to the rail groove. The elastic material filled is changed according to the index performance of the material to achieve different deformation amounts, thereby achieving different sliding amounts.

[0062] 3. Through two-stage sliding, a larger longitudinal expansion and contraction amount can be achieved, and the length of the rail expansion zone can be longer than the rail expansion zone of the small resistance fastener, which can adapt to continuous beam bridges with longer spans, such as bridges with a span of 150m.

[0063] 4. Since the track of the present invention still includes an elastic pad and an elastic material, the present invention also retains the structural characteristics of continuous support and continuous locking of the embedded track.

[0064] 5. The track of the present invention is easy to maintain. When replacing the rails, the in-slot structure can be integrated in the factory and assembled and installed on site, which reduces the workload of on-site construction and improves maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] Figure 1 This is a top view of the graded sliding continuous support track suitable for large-span bridges described in Example 1 of the present invention.

[0066] Figure 2 This is a cross-sectional view of the graded sliding continuous support track suitable for large-span bridges as described in Example 1 of the present invention.

[0067] Figure 3 for Figure 2 A magnified schematic diagram of center A.

[0068] Figure 4 This is a cross-sectional view of the graded sliding continuous support track suitable for large-span bridges as described in Example 2 of the present invention.

[0069] Figure 5 for Figure 4 A magnified schematic diagram of point B in the middle.

[0070] Figure 6 This is the model diagram of the longitudinal force unit of the rail.

[0071] Figure 7 This is the temperature stress distribution and rail displacement diagram of the seamless line.

[0072] Icons: 1-sleeper, 2-clamp, 3-rail groove, 301-crimping part, 4-track, 5-elastic material, 6-vertical limit plate, 7-horizontal limit plate, 8-bolt, 9-reinforcement rib plate, 10-foundation, 11-buckle plate, 12-groove. DETAILED DESCRIPTION

[0073] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are 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.

[0074] Example 1

[0075] like Figure 1-Figure 3 As shown, this embodiment proposes a graded sliding continuous support track suitable for long-span bridges, including a cardboard 2 fixedly mounted on a sleeper 1, a track groove 3 placed on the top surface of the cardboard 2, and limiting components are respectively installed on both sides of the cardboard 2 on the sleeper 1 in the horizontal direction. The limiting components are fixedly connected or detachably connected to the sleeper 1, and the limiting components are used to limit the horizontal and vertical directions of the track groove 3. The track groove 3 can slide relative to the cardboard 2 in the longitudinal direction. An elastic pad and a track 4 are installed in the track groove 3, and the elastic pad continuously supports the track 4. The gap between the track 4 and the track groove 3 is filled with an elastic material 5, and the elastic material 5 locks the track 4.

[0076] Among them, longitudinal refers to the direction of the line, transverse refers to the direction perpendicular to the longitudinal direction in the horizontal plane, and vertical refers to the direction perpendicular to the ground.

[0077] In this embodiment, the material of the rail groove 3 can be steel, cast iron, fiberglass, etc., the track 4 can be a steel rail, and the elastic material 5 can be a polymer material, such as polyurethane, rubber, etc.

[0078] The top surface of the clamping plate 2 is provided with a friction structure, and the friction structure is used to change and adjust the friction force between the clamping plate 2 and the rail groove 3.

[0079] In this embodiment, the friction structure is a plurality of grooves 12 provided on the top surface of the card plate 2, and the grooves 12 are provided to change the friction coefficient of the contact surface between the card plate 2 and the rail groove 3. The size, number, spacing of the grooves 12 and the contact area between the card plate 2 and the bottom of the rail groove 3 can be designed according to the additional displacement and sliding requirements of the bridge.

[0080] The friction structure is not limited to the form of setting a groove 12 on the top surface of the card plate 2, and can also be in the form of setting a protrusion on the top surface of the card plate 2, or adding friction material on the top surface of the card plate 2, as long as it can meet the requirements of adjusting the friction force between the card plate 2 and the rail groove 3.

[0081] In this embodiment, the card plate 2 adopts a hard U-shaped card plate 2, and the hard U-shaped card plate 2 is inverted on the sleeper 1. Specifically, the hard U-shaped card plate 2 includes a panel and end plates connected to its two longitudinal ends, the panel is attached to the top surface of the sleeper 1, and the two end plates are respectively attached to the two longitudinal ends of the sleeper 1, the panel and the end plate are an integrally formed structural part, and the card plate 2 is fixedly installed on the sleeper 1 through the end plate, and when the rail groove 3 slides in the longitudinal direction, the card plate 2 does not move.

[0082] The cardboard 2 is not limited to a U-shaped cardboard 2, but preferably made of hard material, such as glass fiber reinforced nylon. The cardboard 2 can also be a common flat plate, by opening a mounting groove on the sleeper 1, inserting the cardboard 2 into the mounting groove, so that the cardboard 2 is fixedly installed on the sleeper 1, or the cardboard 2 is fixedly installed on the sleeper 1 by bonding or bolting, etc., as long as the cardboard 2 can be fixedly installed on the sleeper 1.

[0083] The rail groove 3 is formed with crimping parts 301 on both sides of the horizontal direction, and the limiting component includes a vertical limiting piece 6 and a horizontal limiting piece 7. The horizontal limiting piece 7 abuts against the horizontal sides of the rail groove 3 and the clamping plate 2. The vertical limiting piece 6 is located on the top surface of the horizontal limiting piece 7, and one end of the vertical limiting piece 6 is crimped on the crimping part 301 to limit the rail groove 3 vertically. The vertical limiting piece 6 and the horizontal limiting piece 7 are connected to the sleeper 1 through a connecting piece. Specifically, the connecting piece passes through the vertical limiting piece 6 and the horizontal limiting piece 7 in sequence, and then is inserted into the sleeper 1 to connect with the sleeper 1.

[0084] In this embodiment, the rail groove 3 includes a groove bottom plate and groove side plates connected to the two lateral sides thereof, and the two lateral sides of the groove bottom plate extend out of the corresponding groove side plates, and the extended parts are the crimping parts 301. The shape of the rail groove 3 is like an inverted π shape. A reinforcing rib plate 9 is connected between the groove side plate and the crimping part 301, and the reinforcing rib plate 9 can be a triangular rib plate, a square rib plate, etc. The rail groove 3 can be an integral welded part or a casting, or it can be assembled and combined with standard profiles.

[0085] The crimping portion 301 is not limited to being realized by extending the groove bottom plate on both lateral sides, and can also be realized by fixing and connecting crimping plates on both lateral sides of the rail groove 3 .

[0086] In this embodiment, the vertical limit plate 6 is made of spring steel springs, which have high tensile strength, elastic limit and fatigue strength, and can be used under impact, vibration or long-term cross stress. When installed here, it can adapt to the vibration of the track 4 and at the same time limit the rail groove 3 for a long time, stably and reliably.

[0087] But it is not limited to spring steel springs, other components with certain strength and elasticity can also be used.

[0088] In this embodiment, the connecting member is a bolt 8, and a bolt 8 hole is opened on the sleeper 1. The rod of the bolt 8 passes through the spring steel spring piece and the through hole on the transverse limit piece 7 in sequence, and then is screwed into the bolt 8 hole on the sleeper 1. The head of the bolt 8 is limited to the top surface of the spring steel spring piece.

[0089] The above structure can realize the two-stage sliding of the graded sliding continuous support track suitable for large-span bridges. The first-stage sliding is to use the contact surface between the clamping plate 2 and the rail groove 3 as a large sliding pair of the track. The rail groove 3 and the rails in the groove and other components slide along the longitudinal direction of the sleeper 1 as a whole, and different sliding amounts can be achieved by changing the friction coefficient of the contact surface between the clamping plate 2 and the rail groove 3; the second-stage sliding is to deform the elastic material 5 in the rail groove 3, and the longitudinal sliding of the track 4 relative to the rail groove 3 can be achieved by changing the elastic material 5 filled according to the material index performance to achieve different deformation amounts, thereby achieving different sliding amounts; combining the two types of sliding can adapt to bridge structures of different spans, achieve a larger longitudinal expansion and contraction amount, and solve the structural vibration of large-span bridges and the secondary structural noise problems caused thereby.

[0090] The graded sliding continuous support track suitable for large-span bridges can be quickly constructed using track rows, and its specific process can be divided into two types according to the foundation 10 structure:

[0091] First, when the foundation 10 is a cast-in-place concrete structure, the construction method includes:

[0092] Step 1: Arrange the sleepers 1 at standard spacing outside the site, and then install the cardboard 2 on the sleepers 1;

[0093] Step 2: Install the rail groove 3 on the card plate 2 and fix and limit it by the limiting component;

[0094] Step 3: Use a special connection tool to connect the track 4 and the track groove 3 into a whole, wherein the track groove 3 is provided with a connection hole;

[0095] Step 4: hoist the sleeper 1, the pallet 2, the rail groove 3 and the track 4 as a whole to the installation position and initially lay them in place;

[0096] Step 5: After fine-tuning the position of track 4, fix the sleeper 1 in place through the position of track 4 and pour the ballast bed concrete;

[0097] Step 6: Remove the special connection tooling, install the elastic pad in the track 4, install the track 4 in the track groove 3 and make fine adjustments, then pour the elastic material 5 in the track groove 3 to lock the track 4.

[0098] Second, when the foundation 10 is a prefabricated plate structure, the construction method includes:

[0099] Step 1: hoist the track slab and initially lay it in place, and install the cardboard 2 on the sleeper 1 of the track slab;

[0100] Step 2: Install the rail groove 3 on the card plate 2 and fix and limit it by the limiting component;

[0101] Step 3: Install the elastic pad in the track 4, install the track 4 in the track groove 3 and fine-tune the track 4, then pour the elastic material 5 in the track groove 3 to lock the track 4.

[0102] The graded sliding continuous support track suitable for large-span bridges is easy to maintain, and the specific implementation methods for different maintenance conditions are as follows:

[0103] 1. Elevation adjustment: Use tooling or a jack to lift the rail groove 3 and its internal components, install an adjustment piece between the clamping plate 2 and the sleeper 1, and adjust the elevation by installing adjustment pieces of different heights;

[0104] 2. Track gauge / track direction adjustment: The limit components can be replaced with different specifications according to the track gauge / track direction adjustment amount, and the replacement is convenient;

[0105] 3. Rail replacement: The components in the rail groove 3 can be prefabricated in advance and transported to the site as a whole. They can be used directly after welding the rails.

[0106] The present invention adopts a two-stage sliding structure, and the length of the rail expansion zone is longer than that of the rail expansion zone of the small resistance fastener, which can adapt to bridges with longer spans. The specific analysis process is as follows:

[0107] Figure 6 This is the model diagram of the rail longitudinal force unit. Figure 6 Combined with the force balance condition and the fact that the total strain is equal to the sum of the temperature strain and the strain based on Hooke's law, we can know that:

[0108]

[0109] Figure 7 The temperature stress distribution and rail displacement diagram of the seamless line are shown in Figure 2. Figure 7 , when x=l a , N=0. Then combine the above formulas to get:

[0110]

[0111] Assuming that the rigidity of the embedded track groove is k, the clamping rigidity of the clamping piece on the steel groove is τ0, and the clamping rigidity of the small resistance fastener is τ0, the rigidity of the structure after series connection is:

[0112]

[0113] Then the length of the expansion zone of the embedded track is:

[0114]

[0115] The resistance of the small resistance fastener is τ = τ0, so the length of the expansion zone of the fastener track structure is:

[0116]

[0117] Finally, the expansion area of ​​the embedded track is longer than that of the fastener track. as follows:

[0118]

[0119] Example 2

[0120] The difference between this embodiment and embodiment 1 is that:

[0121] like Figure 4 and Figure 5 As shown, the limiting component does not adopt the assembled combination structure of the vertical limiting plate 6 and the horizontal limiting plate 7, but directly adopts an integrally formed buckling plate 11, and a crimping groove is provided on the buckling plate 11. The crimping portion 301 of the rail groove 3 and the side of the clamping plate 2 are both limited in the crimping groove, and the buckling plate 11 is connected to the sleeper 1 through a connecting piece.

[0122] The connecting piece is a bolt 8 , and a bolt hole is opened on the sleeper 1 . The rod of the bolt 8 passes through the buckling plate 11 and is screwed into the bolt hole on the sleeper 1 . The head of the bolt 8 is limited to the top surface of the buckling plate 11 .

[0123] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A graded sliding continuous support track suitable for long-span bridges, characterized by: It comprises a rail groove, in which an elastic pad and a rail are installed, the elastic pad continuously supports the rail, and the gap between the rail and the rail groove is filled with elastic material; The rail groove is arranged on the sleeper, and limiting components are arranged on both lateral sides of the rail groove. The limiting components are used to limit the rail groove in the lateral and vertical directions. The rail groove can slide relative to the sleeper in the longitudinal direction.

2. The step-by-step sliding continuous support track suitable for long-span bridges according to claim 1 is characterized in that: A clamping plate is fixedly mounted on the rail sleeper, the rail groove is arranged on the top surface of the clamping plate, and the rail groove can slide relative to the clamping plate in the longitudinal direction.

3. The step-by-step sliding continuous support track suitable for long-span bridges according to claim 2 is characterized in that: The top surface of the clamping plate is provided with a friction structure.

4. The step-by-step sliding continuous support track suitable for long-span bridges according to claim 3 is characterized in that: The friction structure is a groove or a protrusion arranged on the top surface of the clamping plate.

5. The step-by-step sliding continuous support track suitable for long-span bridges according to claim 2 is characterized in that: The clamping plate is fixed on the sleeper by clamping, bonding, bolting or embedding on the top surface of the sleeper.

6. The step-by-step sliding continuous support track suitable for long-span bridges according to claim 5 is characterized in that: When the clamping plate is fixed to the sleeper by clamping, the clamping plate adopts a U-shaped clamping plate, and the U-shaped clamping plate includes a panel and end plates connected to its two longitudinal ends. The panel is attached to the top surface of the sleeper, and the two end plates are respectively attached to the two longitudinal ends of the sleeper. The panel and the end plates are an integrally formed structural part.

7. The step-by-step sliding continuous support track suitable for long-span bridges according to claim 2 is characterized in that: The rail groove has crimping parts formed on both lateral sides thereof, and the limiting component adopts an assembled structure or an integrally formed structure.

8. The step-by-step sliding continuous support track suitable for long-span bridges according to claim 7 is characterized in that: The limiting component includes a vertical limiting piece and a transverse limiting piece, the transverse limiting piece abuts against the transverse sides of the rail groove and the clamping plate, the vertical limiting piece is located on the top surface of the transverse limiting piece, and one end of the vertical limiting piece is crimped onto the crimping portion to vertically limit the rail groove, and the vertical limiting piece and the transverse limiting piece are connected to the sleeper via a connecting piece.

9. The step-by-step sliding continuous support track suitable for long-span bridges according to claim 7 is characterized in that: The limiting component includes an integrally formed buckling plate, on which a crimping groove is provided, the crimping portion of the rail groove and the side of the clamping plate are both limited in the crimping groove, and the buckling plate is connected to the sleeper through a connecting piece.

10. The installation method of the graded sliding continuous support track for a long-span bridge according to any one of claims 2 to 9, characterized in that: When the foundation is a cast-in-place concrete structure, the following steps are included: S1: Arrange the sleepers at standard spacing outside the site, and then install the pallets on the sleepers; S2: Install the rail groove on the pallet and fix and limit it by limiting components; S3: Use tooling to connect the rail and the rail groove into a whole; S4: hoist the sleepers, pallets, rail grooves and tracks as a whole to the installation location and initially lay them in place; S5: After fine-tuning the track position, the sleepers are fixed in place by the track position and the ballast bed concrete is poured; S5: Remove the tooling, install the elastic pad in the track, install the track in the track groove and perform fine adjustment, and then pour the elastic material in the track groove; When the foundation is a prefabricated slab structure, the following steps are included: S1: hoist the track slab, lay it in place initially, and install the pallet on the sleepers of the track slab; S2: Install the rail groove on the pallet and fix and limit it by limiting components; S3: Install elastic pads in the track, install the track in the track groove and fine-tune the track, and then pour elastic material in the track groove.

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