Beam-column type ballast track structure suitable for large deformation section

Abstract

The utility model discloses a kind of beam-column type ballast track structures suitable for large deformation section, including rail body, fastener system body, middle convex streamline sleeper beam, sleeper beam lower elastic backing plate, beam side limiting rubber backing plate, column type U-shaped pedestal, high-strength threaded tube, track bed body, auxiliary ballast.The utility model uses the mode that column type U-shaped pedestal and middle convex streamline sleeper beam are matched, replace the main bearing system of traditional ballast track sleeper and bulk track bed, structure stress is more explicit, reduce the effect of ballast particle small, avoid ballast broken, wear and tear and pulverization.Simultaneously, using middle convex streamline sleeper beam, cancel ballast shoulder height, reduce track bed top surface height etc., aerodynamic effect under the action of high-speed train is greatly reduced, to prevent ballast splashing occurs.

Description

Technical Field

[0001] This utility model relates to the field of new track structures for railway engineering, specifically to a beam-column type ballasted track structure suitable for sections with large deformation. Background Technology

[0002] Track structure is a crucial infrastructure component of high-speed railways, and its quality directly impacts train operation safety and passenger comfort. Ballasted track is widely used on high-speed railway lines with speeds below 250 km / h, and is an essential choice for high-speed railway lines with speeds above 250 km / h when crossing major rivers and in particularly complex terrain.

[0003] Traditional ballasted track structures consist of rails, sleepers, fasteners, and ballast, forming a multi-layered heterogeneous structure. Because the sleepers and ballast are in direct contact, under the combined effects of train loads and complex environments, the ballasted track is prone to wear, breakage, and other deterioration behaviors, leading to cumulative settlement and affecting track smoothness. Simultaneously, under high-speed train operation conditions, the complex aerodynamic flow field on the track surface can cause ballast splashing, impacting the train body and trackside equipment, threatening operational safety. Furthermore, some railway lines face complex geological and harsh environmental conditions, including active fault zones, intense plateau activity, frequent geological disasters, significant risks of large foundation deformation, high-altitude low-oxygen environments, numerous ultra-long tunnels, and large temperature differences. Maintenance conditions are extremely poor, making it difficult to control deformation of traditional ballasted track structures, requiring frequent maintenance and repairs, and hindering rapid post-disaster repair. Utility Model Content

[0004] Purpose of the utility model: This utility model provides a beam-column type ballasted track structure suitable for large deformation sections, solving the problem of difficult operation and maintenance of ballasted tracks in large deformation sections.

[0005] Technical Solution: This utility model proposes a beam-column type ballasted track structure suitable for large deformation sections, including a rail body, a fastening system body located on both sides of the rail body, a convex streamlined sleeper beam located below the fastening system body, and a column-type U-shaped platform located below the convex streamlined sleeper beam; the convex streamlined sleeper beam includes rail bearing grooves provided at both ends and limiting grooves located on both sides below the rail bearing grooves; the rail body is engaged in the rail bearing grooves by the fastening system body, and the column-type U-shaped platform includes a U-shaped limiting groove, which is engaged and fixed with the limiting groove.

[0006] Preferably, the convex streamlined sleeper beam further includes a smooth, rounded convex waist in the middle and edge structures at both ends, wherein the edge structures are provided with rail-supporting grooves and limiting grooves.

[0007] Preferably, the height of the pillow waist is lower than that of the two side edge structures.

[0008] Preferably, the column-type U-shaped base further includes a ramp located outside the U-shaped limiting groove and a column-type support structure located below the U-shaped limiting groove.

[0009] Preferably, it also includes threaded tubes, and the two columnar U-shaped bases are fixed together by a pair of threaded tubes.

[0010] Preferably, a beam-side limiting rubber pad is fixed inside the U-shaped limiting groove, and an elastic pad under the sleeper beam is laid at the bottom of the U-shaped limiting groove.

[0011] Preferably, the beam-side limiting rubber pad is fitted with the limiting groove.

[0012] Beneficial Effects: The ballasted track structure proposed in this invention uses a combination of column-type U-shaped pedestals and convex streamlined sleeper beams to replace the main load-bearing system of traditional ballasted track sleepers and loose track bed. This results in a more clearly defined structural stress distribution, reduces the impact of ballast particles, and prevents ballast breakage, wear, and pulverization. Simultaneously, the use of convex streamlined sleeper beams eliminates ballast shoulder stacking and lowers the top surface height of the track bed, significantly reducing the aerodynamic effects under high-speed trains and preventing ballast splashing. Furthermore, the use of elastic pads under the sleeper beams, which can be significantly adjusted in height, allows for rapid restoration of the track's geometry without the need for heavy-duty tamping. This novel ballasted track structure features factory manufacturing, on-site assembly construction, and adjustable elastic pads in large deformation sections, making it particularly suitable for laying in complex and special sections of high-speed railways. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall beam-column type ballast track structure of this utility model;

[0014] Figure 2 This is a front view of the beam-column type ballast track structure of this utility model;

[0015] Figure 3 This is a side view of the beam-column type ballast track structure of this utility model;

[0016] Figure 4 This is a top view of the beam-column type ballast track structure of this utility model;

[0017] Figure 5 This is a front view of the main structure of the beam-column type ballast track of this utility model;

[0018] Figure 6 This is a side view of the main structure of the beam-column type ballast track of this utility model;

[0019] Figure 7 This is a top view of the main structure of the beam-column type ballast track of this utility model;

[0020] Figure 8This is a three-dimensional view of the convex streamlined sleeper beam of this utility model;

[0021] Figure 9 This is a front view of the convex streamlined sleeper beam of this utility model;

[0022] Figure 10 This is a perspective view of the column-type U-shaped base of this utility model;

[0023] Figure 11 This is a three-dimensional view of the elastic pad under the sleeper beam of this utility model;

[0024] Figure 12 This is a three-dimensional view of the beam-side limiting rubber pad of this utility model;

[0025] Figure 13 This is a calculation diagram of the longitudinal resistance of a single sleeper beam according to this utility model;

[0026] Figure 14 This is a calculation diagram of the lateral resistance of a single sleeper beam according to this utility model;

[0027] Figure 15 This is an assembly drawing of the main components of the beam-column type ballast track of this utility model. Detailed Implementation

[0028] Given that traditional ballasted track structures are prone to ballast deterioration and splashing under the combined effects of train loads and complex external environments, track bed settlement and deformation are difficult to control, requiring frequent maintenance and repairs, and post-disaster repairs are difficult to complete quickly. Therefore, this invention proposes a beam-column ballasted track structure with minimal deformation, low maintenance requirements, convenient construction, and suitability for sections with large deformation.

[0029] To facilitate understanding of the embodiments of the present invention, the following will provide further explanation and description with reference to the accompanying drawings and several specific embodiments. These embodiments do not constitute a limitation on the embodiments of the present invention.

[0030] Example 1:

[0031] See Figures 1-4 A novel beam-column ballast track structure suitable for sections with large deformation is characterized by comprising: a rail body 1, a fastener system body 2, a convex streamlined sleeper beam 3, an elastic pad under the sleeper beam 4, a beam side limiting rubber pad 5, a column-type U-shaped base 6, a high-strength threaded pipe 7, a track bed body 8, and auxiliary ballast 9.

[0032] The rail body 1 has fastening system bodies 2 on both sides. A convex streamlined sleeper beam 3 is installed below the fastening system body 2. A column-type U-shaped base 6 is fixed below the convex streamlined sleeper beam 3. The convex streamlined sleeper beam 3 includes rail bearing grooves 31 at both ends. A sleeper waist 32 is provided between the rail bearing grooves 31 on both sides. The sleeper waist 32 is smooth and round convex. Limiting grooves 33 are provided on both sides below the rail bearing grooves 31. The rail body 1 is engaged in the rail bearing grooves 31 by the fastening system body 2. The column-type U-shaped base 6 includes a U-shaped limiting groove 61. The U-shaped limiting groove 61 is engaged and fixed with the limiting groove 33.

[0033] In the embodiments provided by the present invention, see Figures 5-9 The convex streamlined sleeper beam 3 has a smooth convex structure on its waist 32, with locally smoothed end edges, significantly reducing the aerodynamic effects between the high-speed train and the track structure and effectively preventing ballast splashing. Furthermore, 5mm deep grooves are provided on both sides of the rail bearing groove 31 to facilitate a tight fit with the beam side limiting rubber pads 5, thereby restricting the longitudinal and lateral displacement of the convex streamlined sleeper beam.

[0034] In the embodiments provided by the present invention, see Figure 10 The column-type U-shaped base 6 mainly consists of a ramp 62, a U-shaped limiting groove 61, a column-type support structure 63, and a high-strength threaded pipe 7. The inner side of the U-shaped limiting groove 61 is fixed with a high-strength adhesive to the beam-side limiting rubber pad 5. An elastic pad 4 under the sleeper beam is laid at the bottom of the groove, and then assembled with the convex streamlined sleeper beam 3 to achieve a tight fit between the sleeper beam and the lower column-type U-shaped base 6.

[0035] In the embodiments provided by the present invention, see Figure 5 and Figure 10 The column-type U-shaped support 6 is installed at the end of each convex streamlined sleeper beam 3, and the column-type U-shaped supports are connected by two φ50mm high-strength threaded pipes 7, which greatly improves the lateral stability of the track structure. The center-to-center distance between the two high-strength threaded pipes 7 is 190mm, and the distance from the bottom of the column-type U-shaped support 6 is 175mm. In addition, the column-type U-shaped support 6 is a prefabricated component, which is convenient and quick to construct. The column-type U-shaped support 6 is 450mm long and 380mm wide; the bottom width of the limiting groove is 270mm, and the thickness on both sides of the groove is 45mm.

[0036] In the embodiments provided by the present invention, see Figures 1-4 Auxiliary ballast 9 is dispersedly filled around the track panel of the new track structure. It only bears a small part of the dynamic load of the train. It is mainly used to improve the drainage performance of the new track structure and to help enhance the longitudinal and lateral stability of the track structure. The particle size distribution is not strictly controlled and can be sourced locally or replaced by discarded ballast.

[0037] In the embodiments provided by the present invention, see Figures 1-4 The ballast body 8 eliminates the ballast shoulder stacking height, and the ballast filling height on the side of the sleeper beam is reduced by 30mm, which reduces the aerodynamic effect under high-speed driving conditions, prevents ballast splashing, and saves a lot of construction costs.

[0038] In the embodiments provided by the present invention, see Figure 11 The elastic pad 4 under the sleeper beam can transfer the train load to the lower column-type U-shaped platform 6, and can also restore the geometric shape of the track by adjusting the height of the pad, without the need for track tamping maintenance. It is particularly suitable for sections with large deformation, complex geological conditions and sections for rapid track restoration after disasters.

[0039] In the embodiments provided by the present invention, see Figures 5-7 The convex streamlined sleeper beam 3, together with the elastic pad 4 under the sleeper beam, the side limiting rubber pad 5, and the column-type U-shaped base 6, form a complete force transmission system. This avoids direct contact between the loose ballast and the continuous sleeper in the traditional ballasted track structure. The stress on the structural system is more clearly defined, and the breakage and deterioration of ballast particles no longer occur, saving a lot of track maintenance costs.

[0040] In the embodiments provided by the present invention, see Figure 1 and Figure 12 The elastic pad 4 under the sleeper beam, the track bed body 8, and the convex streamlined sleeper beam 3 form a three-layer vibration reduction structure system, which can effectively reduce environmental vibration and noise under train load.

[0041] In the embodiments provided by the present invention, see Figure 13 and 14 A novel beam-column type ballistic track structure suitable for sections with large deformation is proposed. Its sleeper beams exhibit 30%–50% greater longitudinal and lateral resistance than traditional ballistic tracks, resulting in improved stability. The specific calculation formula is as follows:

[0042] F z =F b +F f1 +F f2 +F c1 +F c2 (1)

[0043] In the formula, F z For the longitudinal resistance of the convex streamlined sleeper beam; F b F represents the longitudinal force exerted by the ballast on the sleeper beam. c1 and F c2 These represent the longitudinal forces exerted by the inner beam-side limiting rubber pads of the U-shaped column base on the sleeper beam; F f1 and F f2 To separate the longitudinal friction force between the elastic pad under the sleeper beam and the sleeper beam.

[0044] FL =F n1 +F n2 +F n3 +F n4 +F m1 +F m2 +F t1 +F t2 +F e (2)

[0045] In the formula, F L For the lateral resistance of the convex streamlined sleeper beam; F n1 F n2 F n3 F n4 The values ​​F represent the lateral forces exerted by the inner beam-side limiting rubber pads of the U-shaped column base on the sleeper beam. m1 and F m2 These represent the lateral forces acting between the two sides and bottom of the convex streamlined sleeper beam and the ballast; F t1 and F t2 These represent the lateral frictional force between the elastic pad under the sleeper beam and the sleeper beam; F e The lateral force is applied to the ballast at the end of the convex streamlined sleeper beam.

[0046] Example 2:

[0047] See Figure 15 A novel beam-column type ballasted track structure suitable for sections with large deformation is characterized by the use of lightweight column-type U-shaped bases 6 and a simplified prefabricated assembly construction process, making on-site construction more convenient. The specific construction steps are as follows:

[0048] (1) Use hoisting machinery to place the prefabricated column-type U-shaped platform 6 on the foundation. Then place the elastic pad 4 under the sleeper beam at the bottom of the U-shaped limiting groove of the column-type U-shaped platform 6.

[0049] (2) On site, the column-type U-shaped base 6 is assembled with the convex streamlined sleeper beam 3 to ensure that the end limiting groove 31 of the sleeper beam is fully and tightly fitted with the side limiting rubber pad 5 of the beam.

[0050] (3) Install the rail body 1 and the fastener system body 2, lay auxiliary ballast 9 in the new rail panel frame, and level the line.

[0051] In summary, this invention provides a novel beam-column type ballistic track structure suitable for sections with large deformation. This structure mainly consists of the rail body, fastening system body, convex streamlined sleeper beams, elastic pads under the sleeper beams, side-limiting rubber pads, column-type U-shaped bases, high-strength threaded pipes, track bed body, and auxiliary ballast. This novel structure uses a combination of column-type U-shaped bases and convex streamlined sleeper beams to replace the traditional main load-bearing system of ballistic track sleepers and loose track bed. The structural stress is more clearly defined, reducing the impact of ballast particles and preventing ballast breakage, wear, and pulverization. Simultaneously, the use of convex streamlined sleeper beams eliminates ballast shoulder stacking and lowers the top surface height of the track bed, significantly reducing the aerodynamic effects under high-speed trains and preventing ballast splashing. Furthermore, the use of elastic pads under the sleeper beams, which can be significantly adjusted in height, allows for rapid restoration of the track geometry, eliminating the need for heavy-duty tamping maintenance. This new type of ballast track structure features factory manufacturing, on-site assembly construction, and elastic pad amplitude adjustment in large deformation sections. It is particularly suitable for laying in complex and special sections of high-speed railways, ensuring smooth and continuous operation of the entire high-speed railway in my country, and providing key technical support for the sustained and healthy development of my country's high-speed railways.

Claims

1. A beam-column type ballasted track structure suitable for sections with large deformation, characterized in that, The system includes a rail body (1), a fastening system body (2) located on both sides of the rail body (1), a convex streamlined sleeper beam (3) located below the fastening system body (2), and a column-type U-shaped platform (6) located below the convex streamlined sleeper beam (3). The convex streamlined sleeper beam (3) includes rail bearing grooves (31) at both ends and limiting grooves (33) located on both sides below the rail bearing grooves (31). The rail body (1) is engaged in the rail bearing grooves (31) by the fastening system body (2). The column-type U-shaped platform (6) includes a U-shaped limiting groove (61), which is engaged and fixed with the limiting groove (33).

2. The beam-column type ballasted track structure suitable for large deformation sections according to claim 1, characterized in that, The convex streamlined sleeper beam (3) also includes a smooth, round convex waist (32) in the middle and edge structures at both ends, with rail bearing grooves (31) and limiting grooves (33) provided on the edge structures.

3. The beam-column type ballasted track structure suitable for large deformation sections according to claim 2, characterized in that, The height of the pillow waist (32) is lower than that of the two side edge structures.

4. The beam-column type ballasted track structure suitable for large deformation sections according to claim 1, characterized in that, The column-type U-shaped base (6) also includes a ramp (62) located outside the U-shaped limiting groove (61) and a column-type support structure (63) located below the U-shaped limiting groove (61).

5. The beam-column type ballasted track structure suitable for large deformation sections according to claim 3, characterized in that, It also includes a threaded tube (7), and the two columnar U-shaped bases (6) are fixed together by a pair of threaded tubes (7).

6. The beam-column type ballasted track structure suitable for large deformation sections according to claim 1, characterized in that, The U-shaped limiting groove (61) is fixed with a beam-side limiting rubber pad (5) inside, and the bottom of the U-shaped limiting groove (61) is covered with a sleeper beam under elastic pad (4).

7. The beam-column type ballasted track structure suitable for large deformation sections according to claim 6, characterized in that, The beam-side limiting rubber pad (5) is fitted with the limiting groove (33).

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