Ballastless track, slab, track slab and rail bearing

Abstract

The present invention provides a ballastless track and its components, plates and rail bearing parts, which can reduce the amount of reinforced concrete and improve the structural performance. The ballastless track includes: a base part; a track plate part, including: a self-compacting layer, a track plate body with multiple hollow grooves corresponding to multiple top convex plates, and multiple upper cover plates; a rail bearing part, including two rail bearing platform units extending along the direction of train travel and respectively located above the outer areas on the left and right sides of the track plate cavity, each rail bearing platform unit includes multiple S-shaped rail bearing platforms connected end to end in sequence to form a wave-shaped continuous extension structure; the S-shaped rail bearing platform includes: two shoulders parallel to the direction of train travel and staggered on both sides of the rail, an inner connecting plate for carrying the rail and connecting the end of one shoulder to the front end of the other shoulder to form a rail bearing groove, and an outer connecting plate for carrying the rail and connecting the end of the other shoulder to the adjacent S-shaped rail bearing platform to form a rail bearing groove; and a rail part.

Description

Technical Field

[0001] The invention belongs to the technical field of railway tracks, and in particular relates to a ballastless track, a plate, a track plate portion and a rail-bearing portion. Background Art

[0002] With the acceleration of railway passenger speed-up, the loose ballasted track can no longer meet the operation of high-speed EMUs. Therefore, an integral ballastless track (for example, CRTSⅢ) suitable for the operation of high-speed EMUs has been developed. Compared with the ballasted track, the ballastless track has better integrity, faster line operation speed, higher comfort, and less maintenance workload.

[0003] However, since the ballastless track is made of prefabricated or cast-in-place reinforced concrete, the cost is relatively high. In addition, in the existing track plate structure, each rail support platform independently protrudes from the surface of the ballastless track plate, playing an important role in supporting the upper rails and the lower ballastless track plate. However, as a key component for load transmission, its total volume is relatively small, which is a weak link in the structure, prone to damage, cracks and other engineering problems, and difficult to repair. Summary of the invention

[0004] The present invention is made to solve the above-mentioned problems, and aims to provide a ballastless track, a plate, a track plate portion and a rail bearing portion, which can reduce the amount of reinforced concrete used and improve the structural performance.

[0005] In order to achieve the above object, the present invention adopts the following scheme:

[0006] <Track>

[0007] The present invention also provides a ballastless track, characterized in that it comprises: a base portion extending along the direction of train travel, comprising: a base provided with at least one limiting groove, and at least one cushion layer arranged in the limiting groove; a track plate portion, comprising: a self-compacting layer provided with at least one chassis convex block at the bottom, a plurality of top convex plates arranged at intervals along the direction of train travel at the top, a track plate body having a plurality of hollow grooves corresponding to the plurality of top convex plates, and a plurality of upper cover plates covering the plurality of hollow grooves; the chassis convex block is matched and embedded with the limiting groove; the upper cover plate and the top convex plate respectively serve as the upper and lower covers of the hollow groove and together with the hollow groove form a track plate cavity; a rail bearing portion, comprising: a base portion extending along the direction of train travel, a self-compacting layer provided with at least one chassis convex block at the bottom, a plurality of top convex plates arranged at intervals along the direction of train travel at the top, a track plate body having a plurality of hollow grooves corresponding to the plurality of top convex plates, and a plurality of upper cover plates covering the plurality of hollow grooves; the chassis convex block is matched and embedded with the limiting groove; the upper cover plate and the top convex plate respectively serve as the upper and lower covers of the hollow groove and together with the hollow groove form a track plate cavity; Two rail support platform units extending and respectively located above the outer areas on the left and right sides of the track plate cavity, each rail support platform unit includes a plurality of S-shaped rail support platforms connected end to end in sequence to form a wave-shaped continuous extension structure; the S-shaped rail support platform includes: two shoulders parallel to the direction of train travel and staggered on both sides of the rails, an inner connecting plate for carrying the rails and connecting the end of one shoulder with the front end of the other shoulder to form a rail support groove, and an outer connecting plate for carrying the rails and connecting the end of the other shoulder with the adjacent S-shaped rail support platform to form a rail support groove; and a rail portion, including: two rows of rails respectively mounted on the two rail support platform units, and a plurality of fasteners connecting the rails and the rail support platform units.

[0008] Preferably, the ballastless track involved in the present invention may also have the following feature: the cross section of the track plate cavity parallel to the train travel direction is a parallelepiped.

[0009] Preferably, the ballastless track involved in the present invention may also have the following feature: two sides of the track plate cavity correspond to the spacing area between adjacent shoulders located on the inner side of the track in the rail support unit.

[0010] Preferably, the ballastless track involved in the present invention may also have the following characteristics: the cross-section of the track plate cavity parallel to the train travel direction is a parallelepiped; the inner connecting plate, shoulder and outer connecting plate of the S-shaped rail support are respectively parallel to the three adjacent sides of the hexagon of the track plate cavity.

[0011] Preferably, the ballastless track involved in the present invention may also have the following characteristics: no material is contained in the track plate cavity, or ballast or other granular materials are contained to form a granular damper. After the track plate cavity is filled with granular materials, vibration can be greatly reduced, and the vibration reduction and noise reduction effect can be effectively improved. In other words, regardless of whether granular materials are placed, the structure of the present invention can achieve better effects, but the vibration reduction and noise reduction effect is better after the granular materials are placed.

[0012] Preferably, the ballastless track involved in the present invention may also have the following characteristics: different granular materials (for example, particles of different material types, or particle compositions of different proportions, or particles of different particle sizes, etc.) are contained in the cavities of adjacent track plates to form particle dampers with different damping properties.

[0013] Preferably, the ballastless track involved in the present invention may also have the following characteristics: the vertical height inside the track plate cavity is more than 1 / 2 of the thickness of the track plate body; the length of the track plate cavity is more than 2 / 3 of the spacing between two rows of rails.

[0014] Preferably, the ballastless track involved in the present invention may also have the following feature: the cushion layer is a rubber pad laid around and on the bottom of the limiting groove.

[0015] Preferably, the ballastless track involved in the present invention may also have the following characteristics: the base comprises a concrete base layer and an isolation layer laid on the upper surface, and the isolation layer material is geotextile.

[0016] <Track plate>

[0017] Furthermore, the present invention also provides a ballastless track plate, characterized in that it comprises: a self-compacting layer having at least one chassis convex block at the bottom and a plurality of top convex plates arranged at intervals along the direction of train travel at the top, a track plate body having a plurality of hollow grooves corresponding to the plurality of top convex plates, and a plurality of upper cover plates covering the plurality of hollow grooves; the chassis convex block is matched and engaged with the limiting groove; the upper cover plate and the top convex plate respectively serve as the upper and lower covers of the hollow groove and together with the hollow groove form a track plate cavity; and a rail bearing portion, including a plurality of top convex plates arranged along the direction of train travel. Two rail support platform units extend and are respectively located on the left and right sides of the track plate cavity, each rail support platform unit includes a plurality of S-shaped rail support platforms which are connected end to end in sequence to form a wave-shaped continuous extension structure; the S-shaped rail support platform includes: two shoulders which are parallel to the travel direction of the train and are staggered on both sides of the rails, an inner connecting plate which is used to carry the rails and connects the end of one shoulder with the front end of the other shoulder to form a rail support groove, and an outer connecting plate which is used to carry the rails and connects the end of the other shoulder with the adjacent S-shaped rail support platform to form a rail support groove.

[0018] <Track plate section>

[0019] Furthermore, the present invention also provides a track plate portion, characterized in that it includes: a self-compacting layer, with at least one chassis protrusion at the bottom and a plurality of top protrusions arranged at intervals along the direction of train travel at the top; a track plate, with a plurality of hollow grooves corresponding to the plurality of top protrusions; a plurality of upper cover plates, respectively covering the plurality of hollow grooves; wherein the chassis protrusions are matched and engaged with the limiting grooves; the upper cover plate and the top protrusion plate respectively serve as the upper and lower covers of the hollow grooves, and together with the hollow grooves form a track plate cavity.

[0020] <Rail support>

[0021] Furthermore, the present invention also provides a rail-supporting portion, characterized in that it comprises: two rail-supporting platform units extending along the direction of train travel and respectively used to support the left and right rails; wherein each rail-supporting platform unit comprises a plurality of S-shaped rail-supporting platforms connected end to end in sequence to form a wave-shaped continuously extending structure; the S-shaped rail-supporting platform comprises: two shoulders parallel to the direction of train travel and staggered on both sides of the rails, an inner connecting plate used to support the rails and connect the end of one shoulder with the front end of the other shoulder to form a rail-supporting groove, and an outer connecting plate used to support the rails and connect the end of the other shoulder with the adjacent S-shaped rail-supporting platform to form a rail-supporting groove.

[0022] The S-shaped rail support platforms are connected in pairs through two shoulders and inner and outer connecting plates, and multiple S-shaped rail support platforms are connected end to end in sequence to form a wave-shaped continuously extended rail support platform unit, which has better integrity, a more reliable structure, and further improved stability.

[0023] Functions and Effects of the Invention

[0024] The ballastless track, plate, track plate portion and rail bearing portion provided by the present invention have the above structure, so not only can the amount of reinforced concrete used be effectively reduced, but also the rail bearing platform structure can be made more stable. Tests have shown that under the same conditions, the ballastless track with the structure of the present invention has significantly less settlement and lateral displacement than the existing ballastless track. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The structure of the ballastless track according to the embodiment of the present invention is shown in FIG. Figure 1 ;

[0026] Figure 2 The structure of the ballastless track according to the embodiment of the present invention is shown in FIG. Figure 2 ;

[0027] Figure 3 is an exploded view of a ballastless track according to an embodiment of the present invention;

[0028] Figure 4 is a cross-sectional view in the length direction of the ballastless track according to an embodiment of the present invention with the rail portion omitted;

[0029] Figure 5 yes Figure 4 A cross-sectional view of the structure in the middle and upper parts;

[0030] Figure 6 yes Figure 4 A cross-sectional view of the structure in the middle and lower parts;

[0031] Figure 7is a schematic diagram of the fitting relationship between the track plate portion and the base portion involved in an embodiment of the present invention;

[0032] Figure 8 is a schematic structural diagram of a ballastless track slab without a self-compacting layer according to an embodiment of the present invention;

[0033] Fig. 9 is a schematic structural diagram of track slab reinforcement involved in an embodiment of the present invention;

[0034] Fig.10 is a cross-sectional view in the width direction of the ballastless track involved in an embodiment of the present invention;

[0035] Fig.11 1 is a structural comparison diagram of different tracks involved in the embodiments of the present invention, wherein (a) is a ballastless track with X sleepers, (b) is a ballastless track of the present invention, and (c) is a ballastless track of the prior art;

[0036] Fig.12 is a comparison diagram of roadbed settlement of different tracks involved in an embodiment of the present invention;

[0037] Fig.13 is a comparison diagram of sleeper lateral displacement curves of different tracks involved in an embodiment of the present invention;

[0038] Fig.14 It is a schematic structural diagram of a particle damper formed by accommodating granular material in a track plate cavity according to a modified example of the present invention;

[0039] Fig.15 is the different particle densities involved in the modified example of the present invention (50, 125, 200, unit: 10 3 kg / m 3 ) Schematic diagram of the relationship between filling rate and displacement attenuation. DETAILED DESCRIPTION

[0040] The ballastless track, plate, track plate portion and rail bearing portion according to the present invention will be described in detail below with reference to the accompanying drawings.

[0041] <Example>

[0042] like Figures 1 to 3 As shown, the ballastless track 10 includes a base portion 20 , a track plate portion 30 , a support rail portion 40 and a rail portion 50 .

[0043] The base portion 20 extends along the traveling direction of the train and includes a concrete base 21 , a base 22 and an elastic cushion layer 23 .

[0044] like Figures 3 to 7As shown, two limiting grooves 21a are provided on the base 22 along the length direction (the direction of train travel), and the base 22 includes a concrete base 22-1 and an isolation layer 22-2. In this embodiment, the limiting groove 21a is a rectangular parallelepiped groove with an upward opening and a rectangular cross-section. The concrete base 22-1 is 5.6m long, 2.9m wide and 0.2m thick. The concrete base 22-1 is cast in place, cast on the concrete base 21, and anchored by rebar with the concrete base 21. The isolation layer 22-2 is paved on the upper surface of the concrete base 22-1, and the paving material is a 4mm geotextile.

[0045] The elastic pad layer 23 is arranged in the limiting groove 21a. In this embodiment, the elastic pad layer 23 is a rubber pad paved on the inner surface of the four side walls and the bottom wall of the limiting groove 21a, and the specific material of the rubber pad is 8mm thick EPDM rubber.

[0046] like Figures 1 to 9 As shown, the rail plate portion 30 includes a self-compacting layer 31 , a rail plate body 32 , and four upper cover plates 33 .

[0047] The bottom of the self-compacting layer 31 is provided with two chassis protrusions 31-1, and the top is provided with four top protrusions 31-2 arranged at intervals along the travel direction of the train. The two chassis protrusions 31-1 are rectangular parallelepiped and respectively match and fit with the two limiting grooves 21a. Each top protrusion 31-2 is a parallelepiped plate structure.

[0048] In this embodiment, the self-compacting layer 31 is a cast-in-place concrete structure with an overall length of 5.6m, a width of 2.5m, and a thickness of 0.1m. The chassis protrusion 31-1 protrudes downward by 0.1m and engages with the limiting groove 12 of the concrete base 22-1. The top protrusion 31-2 protrudes upward by 0.03m.

[0049] The track plate body 32 has four hollow grooves 32-1 corresponding to the four top convex plates 31-2. Each hollow groove 32-1 is through-through from top to bottom, and the cross section parallel to the travel direction of the train is a parallel hexagon.

[0050] The four upper cover plates 33 are respectively covered on the four hollow grooves 32 - 1 .

[0051] The upper cover plate 33 and the top convex plate 31-2 respectively serve as the upper and lower covers of the hollow groove 32-1, and together with the hollow groove 32-1, they enclose the track plate cavity K. The track plate cavity K is filled with air and does not contain any material. The cross section of the track plate cavity K parallel to the direction of train travel is a parallelepiped, and the parallelepiped is symmetrical along the axis of the track plate body 32 (parallel to the direction of train travel). Each side includes three adjacent sides of the parallelepiped, including two oblique sides K1~K2 (long sides) and a parallel side K3 (connecting side) parallel to the axis. The angles between the two oblique sides and the parallel sides are both 157.5°. The upper and lower heights inside the track plate cavity K are more than 1 / 2 of the thickness of the track plate body 32; the length of the track plate cavity K is more than 2 / 3 of the spacing between the left and right rows of rails 51.

[0052] In this embodiment, the track plate body 32 is a prefabricated structure with an overall length of 5.6m, a width of 2.5m, and a thickness of 0.21m. The long side of the track plate cavity K is 0.54m, the short side is 0.2m, and the thickness of the upper cover plate 33 is 0.03m. The track plate body 32 is provided with longitudinal main reinforcement 32a, transverse main reinforcement 32b, X-shaped reinforcement 32c, stirrups 32d and gate-shaped reinforcement 32e. Eight longitudinal main reinforcements 32a are arranged in the area below the rail bearing portion 40, and four are evenly arranged in each of the left and right rows. The eight longitudinal main reinforcements are tied together by stirrups 32d. Ten transverse main reinforcements are arranged in the front and rear end areas of the track plate body 32, and five are evenly arranged in each of the left and right rows. Eight transverse main reinforcements 32b are arranged in the three solid areas in the middle of the track plate cavity K, and four are evenly arranged in each of the left and right rows. The transverse main reinforcements 32b at both ends and in each area in the middle are tied together by stirrups. Eight additional X-shaped reinforcing ribs 32c are arranged between each interval of the track plate body 32, with four ribs arranged in each row on the left and right, and the reinforcing ribs cross each other to form an X-shaped angle of 45°, and each reinforcing rib is parallel to the inclined edge of the rail support platform. A gate-shaped steel bar 32e is arranged at the bottom of the track plate body 32, and the gate-shaped steel bar 32e is tied and overlapped with the longitudinal main reinforcement 32a and the transverse main reinforcement 32b, and extends downward from 0.1m below the bottom surface of the track plate body 32.

[0053] The rail support portion 40 is fixed on the upper surface of the track plate portion 30, and it includes two symmetrically arranged rail support platform units 41. The two rail support platform units 41 extend along the direction of train travel and are respectively located above the outer areas on the left and right sides of the track plate cavity K. The inner sides of the two rail support platform units 41 facing each other and the parts that are concave relative to the track plate cavity K (bent into an opening facing the track plate cavity K in the wavy structure) correspond to the left and right sides of the track plate cavity K respectively; the inner sides of the two rail support platform units 41 facing each other and the parts that are protruding relative to the track plate cavity K (bent into an opening facing away from the track plate cavity K in the wavy structure) correspond to the left and right sides of the interval area between the two track plate cavities K respectively. Each rail support platform unit 41 includes a plurality of S-shaped rail support platforms 41a that are connected end to end in sequence to form a wavy continuous extension structure.

[0054] like Figures 1 to 5 As shown in Figures 8 and 10, the S-shaped rail support platform 41a includes two shoulders 41a-1, an inner connecting plate 41a-2, and an outer connecting plate 41a-3. The two raised shoulders 41a-1 are parallel to the direction of travel of the train and are staggered on both sides of the rail 51. The inner connecting plate 41a-2 is used to support the rail 51, and the end of one shoulder 41a-1 is connected to the front end of the other shoulder 41a-1 to form a rail support groove. The outer connecting plate 41a-3 is used to support the rail 51, and the end of the other shoulder 41a-1 is connected to the adjacent S-shaped rail support platform 41a to form a rail support groove, and the inward slope of the rail support groove is 1:40. The inner connecting plate 41a-2 and the outer connecting plate 41a-3 are both inclined to the direction of travel of the train, and the inclination angle ( Fig.12 The included angles formed by the middle connecting plate and the horizontal left direction are 67.5° and 112.5° respectively; the included angle between the inner connecting plate 41a-2 and the outer connecting plate 41a-3 is 45°. The inner connecting plate 41a-2, the shoulder 41a-1, and the outer connecting plate 41a-3 are parallel to the three adjacent sides K1 to K3 of the hexagon of the track plate cavity K.

[0055] The rail section 50 includes two rows of rails 51 and multiple sets of fasteners 52. The two rows of rails 51 are respectively mounted on two rail support units 41, and are located above the peripheral areas on both sides of the track plate cavity K. Each set of fasteners 52 detachably and fixedly connects an S-shaped rail support 41a to the rail 51.

[0056] like Figures 11 to 13 As shown, in order to verify the performance of the ballastless track proposed by the present invention, the ballastless track of the present invention is compared with the track with X sleepers and the ballastless track of the prior art. It can be seen from the figure that the settlement of the ballastless track of the present invention is about 22% and 58% smaller than that of the ballastless track of the prior art and the track with X sleepers, respectively; the lateral displacement of the middle rail of the ballastless track of the present invention is about 75% and 68% smaller than that of the ballastless track of the prior art and the track with X sleepers, respectively.

[0057] <Modification>

[0058] like Fig.14 As shown, in this variation, the structures of various parts are consistent with those of the embodiment, with the only difference being that the cavity K of the track plate is filled with granular material G to form a granular damper.

[0059] The test shows that when the track plate cavity K is filled with granular material G, the vibration can indeed be reduced. Fig.15 As shown, the particle filling rate is controlled within the range of 50-60%, and the vibration reduction effect is the best.

[0060] The above embodiments are merely examples of the technical solutions of the present invention. The ballastless track, plate, track plate portion and rail bearing portion involved in the present invention are not limited to the structures described in the above embodiments, but are subject to the scope defined in the claims. Any modification, supplement or equivalent replacement made by technicians in the field of the present invention based on the embodiment is within the scope of protection claimed by the present invention.

Claims

1. Ballastless track, It is characterized in that include: The base portion extends along the travel direction of the train, and comprises: a base provided with at least one limiting groove, and at least one cushion layer arranged in the limiting groove; The track plate part comprises: a self-compacting layer having at least one chassis convex block at the bottom, a plurality of top convex plates arranged at intervals along the running direction of the train at the top, a track plate body having a plurality of hollow grooves corresponding to the plurality of top convex plates, and a plurality of upper cover plates covering the plurality of hollow grooves; the chassis convex block is matched and engaged with the limiting groove; the upper cover plate and the top convex plate respectively serve as the upper and lower covers of the hollow groove and together with the hollow groove form a track plate cavity; The rail-bearing portion comprises two rail-bearing platform units extending along the travel direction of the train and respectively located at the outer regions on the left and right sides of the track plate cavity, each of the rail-bearing platform units comprising a plurality of S-shaped rail-bearing platforms connected end to end in sequence to form a wave-shaped continuous extension structure; the S-shaped rail-bearing platform comprises: two shoulders parallel to the travel direction of the train and staggeredly arranged on both sides of the rail, an inner connecting plate for carrying the rail and connecting the end of one shoulder with the front end of the other shoulder to form a rail-bearing groove, and an outer connecting plate for carrying the rail and connecting the end of the other shoulder with the adjacent S-shaped rail-bearing platform to form a rail-bearing groove; and The rail part comprises: two rows of rails respectively mounted on the two rail support units and located on both sides of the track plate cavity, and a plurality of fasteners connecting the rails and the rail support units; Wherein, the cross section of the track plate cavity parallel to the travel direction of the train is a parallelepiped; The inner connecting plate, the shoulder and the outer connecting plate of the S-shaped rail support platform are respectively parallel to three adjacent sides of the hexagonal cavity of the track plate.

2. The ballastless track according to claim 1, characterized in that: in, The two sides of the track plate cavity correspond to the spacing area between adjacent shoulders located on the inner side of the track in the rail support platform unit.

3. The ballastless track according to claim 1, characterized in that: in, The track plate cavity does not contain any material, or contains granular material to form a granular damper.

4. The ballastless track according to claim 1, characterized in that: in, Different granular materials are contained in adjacent track plate cavities to form granular dampers with different damping properties.

5. The ballastless track according to claim 1, characterized in that: in, The vertical height inside the track plate cavity is more than 1 / 2 of the thickness of the track plate body; The length of the track plate cavity is more than 2 / 3 of the distance between the two rows of rails.

6. The ballastless track according to claim 1, characterized in that: in, The cushion layer is a rubber pad laid around and on the bottom of the limiting groove.

7. A ballastless track slab, used in the ballastless track according to claim 1, Features: The track plate part comprises: a self-compacting layer having at least one chassis convex block at the bottom and a plurality of top convex plates arranged at intervals along the travel direction of the train at the top, a track plate body having a plurality of hollow grooves corresponding to the plurality of top convex plates, and a plurality of upper cover plates covering the plurality of hollow grooves; the chassis convex block is matched and engaged with the limiting groove; the upper cover plate and the top convex plate respectively serve as the upper and lower covers of the hollow groove and together with the hollow groove form a track plate cavity; and The rail-bearing part comprises two rail-bearing platform units extending along the travel direction of the train and respectively located at the outer regions of the left and right sides of the track plate cavity, each of the rail-bearing platform units comprises a plurality of S-shaped rail-bearing platforms connected end to end in sequence to form a wave-shaped continuous extension structure; the S-shaped rail-bearing platform comprises: two shoulders parallel to the travel direction of the train and staggeredly arranged on both sides of the rail, an inner connecting plate for carrying the rail and connecting the end of one shoulder with the front end of the other shoulder to form a rail-bearing groove, and an outer connecting plate for carrying the rail and connecting the end of the other shoulder with the adjacent S-shaped rail-bearing platform to form a rail-bearing groove; Wherein, the cross section of the track plate cavity parallel to the travel direction of the train is a parallelepiped; The inner connecting plate, the shoulder and the outer connecting plate of the S-shaped rail support platform are respectively parallel to three adjacent sides of the hexagonal cavity of the track plate.

8. A track slab portion, used in the ballastless track slab according to claim 7, It is characterized in that include: The self-compacting layer has at least one chassis convex block at the bottom and a plurality of top convex plates arranged at intervals along the travel direction of the train at the top; A track plate having a plurality of hollow grooves corresponding to the plurality of top convex plates; A plurality of upper cover plates, respectively covering the plurality of hollow grooves; Wherein, the chassis protrusion is matched and embedded with the limiting groove; The upper cover plate and the top convex plate respectively serve as the upper and lower covers of the hollow groove and together with the hollow groove form a track plate cavity; The cross section of the track plate cavity parallel to the travel direction of the train is a parallelepiped.

9. A rail-bearing portion, used in the ballastless track slab according to claim 7, It is characterized in that include: Two rail support platform units extending along the travel direction of the train and used to support the left and right rails respectively; Each of the rail support platform units comprises a plurality of S-shaped rail support platforms which are connected end to end in sequence to form a wave-shaped continuous extension structure; the S-shaped rail support platform comprises: two shoulders which are parallel to the travel direction of the train and are staggeredly arranged on both sides of the rail, an inner connecting plate which is used to carry the rail and connect the end of one shoulder with the front end of the other shoulder to form a rail support groove, and an outer connecting plate which is used to carry the rail and connect the end of the other shoulder with the adjacent S-shaped rail support platform to form a rail support groove; The inner connecting plate, the shoulder and the outer connecting plate of the S-shaped rail support platform are respectively parallel to three adjacent sides of the hexagon of the track plate cavity.

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