A longitudinal reinforcement device for railway sleepers

Abstract

This invention discloses a longitudinal reinforcement device for railway sleepers, belonging to the technical field of reinforcement for high-speed railway ballast track. The invention includes vertical pile foundations, column base flanges, and transverse baffles. Vertical pile foundations are arranged vertically on both sides of the sleeper end along the train's direction of travel. One end of each vertical pile foundation is embedded in the ground. The other ends of two vertical pile foundations located on the same side of the sleeper end are used to connect to the transverse baffles. The vertical pile foundations of adjacent sleepers are connected in series via column base flanges embedded in the ballast layer. This invention can be used for the reinforcement of sleepers on ballasted track lines.

Description

Technical Field

[0001] This invention relates to a longitudinal reinforcement device for railway sleepers, belonging to the technical field of reinforcement of high-speed railway ballast track. Background Technology

[0002] Ballasted track plays a vital role in current rail transit due to its advantages such as low cost and ease of maintenance, making it widely used in railway lines. Compared to ballastless track, ballasted track has a simpler structure, primarily consisting of crushed stone ballast and sleepers. Ballast-laid track offers good elasticity. However, due to the highly discrete nature of ballast, under long-term cyclical train dynamic loads, ballasted track will experience varying degrees of damage as its service life increases, severely impacting train operation stability and safety.

[0003] Currently, scholars both domestically and internationally have conducted extensive research on the macroscopic vertical settlement of ballasted track beds, proposing methods such as using sleeper pads to reduce vibration and thus reduce overall uneven settlement of the track bed. However, research on the longitudinal deformation of the track bed has been neglected. In practice, during train operation, the longitudinal force of the train can cause the sleepers to move along the direction of travel, leading to unevenness at rail joints, sleeper misalignment, and other issues that severely damage ballasted track lines, even endangering train safety in severe cases. Therefore, reinforcing the sleepers is a feasible approach in the construction of ballasted track reinforcement technology. Protecting the track bed by starting with the sleepers and proposing a sleeper reinforcement device that fits the actual engineering requirements is of great practical significance. Summary of the Invention

[0004] This invention provides a longitudinal reinforcement device for railway sleepers, used for reinforcing railway sleepers on ballasted track lines.

[0005] The technical solution of the present invention is: a longitudinal reinforcement device for a railway sleeper, comprising vertical pile foundations 2, column base flanges 4, and transverse baffles 5. Vertical pile foundations 2 are arranged vertically on both sides of the end of the sleeper 1 arranged along the direction of train travel. One end of the vertical pile foundation 2 is buried in the foundation. The other end of the two vertical pile foundations 2 located on the same side of the end of the sleeper 1 is used to connect the transverse baffles 5. The vertical pile foundations 2 of adjacent sleepers 1 are connected in series through column base flanges 4 buried in the ballast layer.

[0006] The vertical pile foundation 2 is provided with a wedge-shaped groove 2-1 on the side near the sleeper 1. One side of the first elastic pad 3 is tightly engaged with the vertical pile foundation 2 through the wedge-shaped groove 2-1, and the other side of the first elastic pad 3 is tightly engaged with the sleeper 1. A limiting plate 2-2 is provided at the end of the wedge-shaped groove 2-1 near the transverse baffle 5, which is used to restrict the movement of the first elastic pad 3 when it comes into contact with the sleeper 1.

[0007] The vertical pile foundation 2 is provided with a first threaded hole group 2-3 for connection with the column base flange 4.

[0008] The transverse baffle 5 has a second threaded hole group 5-1 at both ends, which is connected to the vertical pile foundation 2 by bolts.

[0009] The transverse baffle 5 has transverse sawtooth grooves 5-2 at both ends near the vertical pile foundation 2, and the second elastic pad 6 is tightly fitted with the transverse baffle 5 through the sawtooth grooves 5-2.

[0010] The second elastic pad 6 is serrated and stepped. The serrated part at the end of the second elastic pad 6 is used to fit tightly with the transverse serrated groove 5-2 of the transverse baffle 5. The protrusion between the two serrated parts of the second elastic pad 6 protrudes from the surface of the transverse baffle 5 and is used to fit tightly with the sleeper 1.

[0011] The longitudinal reinforcement device further includes transverse baffle fasteners 7, T-bolts 8, and nuts 9. The transverse baffle fasteners 7 include a transverse baffle connecting part and a T-bolt connecting part. The T-bolt 8 includes a screw connector 8-1 and a base plate 8-2. The transverse baffle connecting part is used to connect the transverse baffle 5 and the T-bolt connecting part. The T-bolt 8 is movably set relative to the T-bolt connecting part in a preset direction. The connection of the two transverse baffle fasteners 7 is achieved by inserting the T-bolt 8 into the T-bolt connecting parts of the two transverse baffle fasteners 7 installed on both sides of the transverse baffle 5 in a preset direction. The T-bolt 8 is fastened to the nut 9 through the screw connector 8-1, so that the base plate 8-2 compacts and fastens the transverse baffle 5.

[0012] The horizontal baffle connection part has a 7-shaped structure and the free end of the horizontal part of the 7-shaped structure has an extension part. The outer right angle part formed by the connection between the vertical part of the 7-shaped structure and the T-shaped bolt connection part has a reinforcing rib.

[0013] The beneficial effects of this invention are:

[0014] 1. In this invention, the sleepers are reinforced three times by vertical pile foundations, horizontal baffles and column base flanges, which effectively reduces the possibility of longitudinal creep of the sleepers, improves the stability and safety of train operation, and reduces the maintenance cost of ballasted tracks.

[0015] 2. In this invention, an elastic pad is used for transitional contact between the vertical pile foundation and the side of the sleeper, and between the transverse baffle and the end face of the sleeper. Due to the good buffering performance of the elastic pad, the vibration transmitted from the train to the lower track bed is effectively weakened after passing through the sleeper, and the track bed is more stable.

[0016] 3. In this invention, vertical piles are connected in series along the track direction by means of column base flanges. When the train applies longitudinal force to the sleeper, the longitudinal force is transmitted to the vertical pile through the sleeper, and then from the vertical pile to the next vertical pile through the column base flange. In this process, the longitudinal force is dissipated step by step in the track bed. The longitudinal force applied to the sleeper by the train is insufficient to drive the sleeper to crawl, which effectively improves the service life of the track bed.

[0017] 4. In this invention, although the sleepers are longitudinally reinforced, the specific reinforcement device also makes a certain contribution to reducing the vibration of the track bed. By reducing the vibration of the sleepers, the overall vibration of the track bed is reduced, thereby reducing the uneven settlement of the ballasted track. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a partial schematic diagram of the present invention;

[0020] Figure 3 This is a schematic diagram of a vertical pile foundation model provided by the present invention;

[0021] Figure 4 A schematic diagram of the first elastic pad provided by the present invention;

[0022] Figure 5 A schematic diagram of the column base flange model provided by the present invention;

[0023] Figure 6 A schematic diagram of the transverse baffle model provided by the present invention;

[0024] Figure 7 A schematic diagram of the second elastic pad provided by the present invention;

[0025] Figure 8 This is a schematic diagram of the transverse baffle fastener model provided by the present invention;

[0026] Figure 9 This is a schematic diagram of a T-bolt model provided by the present invention;

[0027] The following are the labels in the diagram: 1. Sleeper; 2. Vertical pile foundation; 3. First elastic pad; 4. Column base flange; 5. Horizontal baffle; 6. Second elastic pad; 7. Horizontal baffle fastener; 8. T-bolt; 9. Nut; 2-1. Wedge-shaped groove; 2-2. Limiting plate; 2-3. First threaded hole group; 5-1. Second threaded hole group; 5-2. Serrated groove; 7-1. Third threaded hole group; 8-1. First threaded hole group; 8-2. Base plate. Detailed Implementation

[0028] The invention will be further described below with reference to the accompanying drawings and embodiments, but the scope of the invention is not limited to the description.

[0029] Example 1: As Figure 1-9 As shown, a longitudinal reinforcement device for a railway sleeper includes vertical pile foundations 2, column base flanges 4, and transverse baffles 5. Vertical pile foundations 2 are arranged vertically on both sides of the end of the sleeper 1 along the direction of train travel. One end of the vertical pile foundation 2 is buried in the foundation. The other end of the two vertical pile foundations 2 located on the same side of the end of the sleeper 1 is used to connect the transverse baffles 5. The vertical pile foundations 2 of adjacent sleepers 1 are connected in series through column base flanges 4 buried in the ballast layer.

[0030] Furthermore, the vertical pile foundation 2 is provided with a wedge-shaped groove 2-1 on the side near the sleeper 1. One side of the first elastic pad 3 is tightly engaged with the vertical pile foundation 2 through the wedge-shaped groove 2-1, and the other side of the first elastic pad 3 is tightly engaged with the sleeper 1. A limiting plate 2-2 is provided at the end of the wedge-shaped groove 2-1 near the transverse baffle 5, which is used to restrict the movement of the first elastic pad 3 when it comes into contact with the sleeper 1.

[0031] Furthermore, the vertical pile foundation 2 is provided with a first threaded hole group 2-3 for connection with the column base flange 4.

[0032] Furthermore, the transverse baffle 5 is provided with a second threaded hole group 5-1 at both ends, which is connected to the vertical pile foundation 2 by bolts.

[0033] Furthermore, the transverse baffle 5 is provided with transverse sawtooth grooves 5-2 at both ends near the vertical pile foundation 2, and the second elastic pad 6 is tightly fitted with the transverse baffle 5 through the sawtooth grooves 5-2.

[0034] Furthermore, the second elastic pad 6 is serrated and stepped. The serrations at the ends of the second elastic pad 6 are used to fit tightly with the transverse serrated groove 5-2 of the transverse baffle 5. The protrusion between the two serrated parts of the second elastic pad 6 protrudes from the surface of the transverse baffle 5 and is used to fit tightly with the sleeper 1.

[0035] Furthermore, the longitudinal reinforcement device for the sleeper also includes a transverse baffle fastener 7, a T-bolt 8, and a nut 9. The transverse baffle fastener 7 includes a transverse baffle connecting part and a T-bolt connecting part. The T-bolt 8 includes a screw connector 8-1 and a base plate 8-2. The transverse baffle connecting part is used to connect the transverse baffle 5 and the T-bolt connecting part. The T-bolt 8 is movably set relative to the T-bolt connecting part in a preset direction. The connection of the two transverse baffle fasteners 7 is achieved by inserting the T-bolt 8 into the T-bolt connecting parts of the two transverse baffle fasteners 7 installed on both sides of the transverse baffle 5 in a preset direction. The T-bolt 8 is fastened to the nut 9 through the screw connector 8-1, so that the base plate 8-2 compacts and fastens the transverse baffle 5.

[0036] Furthermore, the transverse baffle connection part has a 7-shaped structure and the free end of the horizontal part of the 7-shaped structure has an extension part, and the outer right angle part formed by the connection between the vertical part of the 7-shaped structure and the T-shaped bolt connection part has a reinforcing rib.

[0037] The optional embodiments of the present invention are described below with reference to the accompanying drawings:

[0038] Reference Figure 1 , 2 A longitudinal reinforcement device for a railway sleeper includes a sleeper 1, vertical pile foundations 2, a first elastic pad 3, a transverse baffle 5, a second elastic pad 6, and several reinforcement components. The vertical pile foundations 2 are arranged along the train's direction of travel, and are in contact with the side wall of the sleeper 1 via the first elastic pad 3. The transverse baffle 5 is installed on the upper part of the sleeper 1, and is connected to the sleeper 1 via the second elastic pad 6. The reinforcement components, excluding the vertical pile foundations 2 and the transverse baffle 5, include: transverse baffle fasteners 7, T-bolts 8, and column base flanges 4 and nuts 9. The transverse baffle fasteners 7 and T-bolts 8 are used to reinforce the transverse baffle 5, and the column base flanges 4 are used to connect the various vertical pile foundations 2 together, further increasing longitudinal resistance and restricting the longitudinal movement of the sleeper 1.

[0039] This longitudinal reinforcement device for sleepers initially restricts the longitudinal displacement of sleeper 1 by installing vertical piles 2 on both sides of sleeper 1. Since the vertical piles 2 are deeply buried in the foundation, they can provide greater resistance to sleeper 1 when a train passes, thereby effectively maintaining the stability of the track bed. Furthermore, by connecting the vertical pile foundation 2 to the side wall of the sleeper 1 via the first elastic pad 3, the vibration of the sleeper 1 under cyclic load can be effectively reduced, which also has a positive impact on the overall uneven settlement of the track bed. At the top of the sleeper end of the sleeper 1, a transverse baffle 5 is connected to a sawtooth stepped elastic pad to limit the sleeper 1 again. By restricting the degree of freedom of the sleeper 1 in the Z-axis direction, the structure of the sleeper 1 is further stabilized. A threaded hole group 2-3 is provided on the side of the vertical pile foundation 2. The threaded hole group 2-3 is connected to the column base flange 4 by bolts. When the train is moving, the column base flange 4 installed on the vertical pile foundation 2 corresponding to the middle and bottom positions of the sleeper 1 can effectively transmit the vibration transmitted from the sleeper 1 to the vertical pile foundation 2 to the adjacent vertical pile foundation 2, which greatly weakens the overall vibration of the track bed and makes the reinforced ballasted rail more stable.

[0040] Specifically, when a train passes by, the track bed will experience significant vibrations, such as Figure 3As shown, the vertical pile foundation 2 requires good bending resistance. The vertical pile foundation 2 is made of steel plates with a thickness of 40mm~60mm, a width of 100mm~120mm, and a length of 1.0m~1.2m. The vertical pile foundation 2 is evenly arranged along the train's direction of travel, with four vertical pile foundations 2 at both ends of each sleeper 1. The vertical pile foundation 2 is equipped with a wedge-shaped groove 2-1 and a limiting plate 2-2. The first elastic pad 3 is installed on the vertical pile foundation 2 through the wedge-shaped groove 2-1. The limiting plate 2-2 is used to position the first elastic pad 3, and this limiting structure ensures that the first elastic pad 3 will not slip when the sleeper 1 vibrates.

[0041] Furthermore, the first elastic pad 3, as Figure 4 As shown, rubber material can be used. In actual construction, the specifications of the sleepers 1 are different, and the tilt angle of the first elastic pad 3 can be changed so that the tilt angle of the first elastic pad 3 can adapt to the change of the tilt angle of the side of the sleeper 1. The first elastic pad 3 and the vertical pile foundation 2 are connected by a wedge-shaped groove 2-1, which is tight and easy to install and remove.

[0042] Furthermore, such as Figure 3 , 5 As shown, each vertical pile foundation 2 has two sets of threaded holes 2-3 on its side. The threaded hole sets 2-3 are M5×0.8, and are connected to the column base flange 4 by bolts. To effectively reduce sleeper vibration, the threaded hole sets 2-3 are respectively located in the middle and bottom of the corresponding sleeper 1. The two sets of threaded holes 2-3 are respectively connected to two column base flanges 4. The column length of the column base flange 4 arranged for each sleeper 1 can be adjusted according to the construction standard of the actual sleeper 1 installation spacing. Along the direction of train travel, the advantage of this series arrangement of column base flanges 4 is that it can effectively and quickly transmit the vibration of the sleeper 1 to the adjacent vertical pile foundation 2. The column base flange 4 is embedded in the ballast layer. Since the loose ballast itself also has a certain energy absorption capacity, the vibration transmitted from the sleeper 1 is transmitted step by step through the first elastic pad 3 - vertical pile 2 - column base flange 4 - loose ballast - next vertical pile 2 - first elastic pad 3 - sleeper 1 - first elastic pad 3 - vertical pile 2 - column base flange 4 - loose ballast - ... This can effectively weaken the vibration effect caused by the train.

[0043] Furthermore, such as Figure 6 , 7As shown, a transverse baffle 5 is installed at the end of the sleeper 1. The transverse baffle 5 is a steel plate with a maximum thickness of 20mm~30mm (i.e., the maximum thickness is at the end), a width of 80mm~100mm, and a length of 400mm~440mm. The specific length and width of the transverse baffle 5 are adapted to the dimensions of the vertical pile foundation 2. A second threaded hole group 5-1 with an M16×1.5 specification is provided at each end of the transverse baffle 5. This second threaded hole group 5-1 is connected to the vertical pile foundation 2 by bolts, restricting the degree of freedom of the sleeper 1 in the Z-axis direction. This not only effectively curbs the crawling phenomenon of the sleeper 1 but also contributes to reducing the vertical vibration of the sleeper 1. A serrated groove 5-2 is provided at the end of the transverse baffle 5. The serrated stepped elastic pad 6 is tightly fitted with the transverse baffle 5 through this groove, making it difficult for the second elastic pad 6 to slide. At the same time, the second elastic pad 6 effectively avoids contact between the two rigid bodies, the transverse baffle 5 and the sleeper 1. The second elastic pad 6 is made of rubber. The serrated connection between the elastic pad and the transverse baffle 5 increases the contact friction. The stepped design increases the thickness of the second elastic pad 6, which can better reduce the vibration of the sleeper 1. On the other hand, the contact between the flexible second elastic pad 6 and the rigid sleeper 1 is more compact than the direct contact between the transverse baffle 5 and the two rigid bodies of the sleeper 1.

[0044] Furthermore, such as Figure 8 , 9 As shown, the transverse baffle fastener 7 and T-bolts 8 are combined to secure the transverse baffle 5. The transverse baffle fastener 7 consists of two parts, left and right. The T-bolts 8 are connected to the transverse baffle fastener 7 via a sliding groove. The transverse baffle fastener 7 has reinforcing ribs to increase structural strength. Each transverse baffle fastener 7 has a third threaded hole group 7-1 on one side of the reinforcing rib. The threaded hole specification of the third threaded hole group 7-1 is M6×1.0. The transverse baffle fastener 7 is fixed to the transverse baffle 5 by bolts. The screw connector 8-1 cooperates with the nut 9. The tightness of the T-bolt base plate 8-2 on the transverse baffle 5 is adjusted by rotating the nut 9. Using the combination of transverse baffle fastener 7 and T-bolts 8 to secure the transverse baffle 5 increases the contact area with the fasteners, preventing severe deformation of the transverse baffle 5 due to the huge impact generated on the track bed during operation.

[0045] The specific embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A longitudinal reinforcement device for railway sleepers, characterized in that, The system includes vertical pile foundations (2), column base flanges (4), and transverse baffles (5). Vertical pile foundations (2) are arranged vertically on both sides of the end of the sleeper (1) arranged along the direction of train travel. One end of the vertical pile foundation (2) is buried in the foundation. The other end of the two vertical pile foundations (2) located on the same side of the end of the sleeper (1) is used to connect the transverse baffles (5). The vertical pile foundations (2) of adjacent sleepers (1) are connected in series through column base flanges (4) buried in the ballast layer. The longitudinal reinforcement device also includes a transverse baffle fastener (7), a T-bolt (8), and a nut (9). The transverse baffle fastener (7) includes a transverse baffle connecting part and a T-bolt connecting part. The T-bolt (8) includes a screw connector (8-1) and a base plate (8-2). The transverse baffle connecting part is used to connect the transverse baffle (5) and the T-bolt connecting part. The T-bolt (8) is movably set relative to the T-bolt connecting part in a preset direction. The T-bolt (8) is inserted into the T-bolt connecting parts of the two transverse baffle fasteners (7) installed on both sides of the transverse baffle (5) in a preset direction to realize the connection of the two transverse baffle fasteners (7). The T-bolt (8) is fastened to the nut (9) through the screw connector (8-1) so that the base plate (8-2) compacts and fastens the transverse baffle (5).

2. The longitudinal reinforcement device for railway sleepers according to claim 1, characterized in that, The vertical pile foundation (2) is provided with a wedge-shaped groove (2-1) on the side near the sleeper (1). One side of the first elastic pad (3) is tightly fitted with the vertical pile foundation (2) through the wedge-shaped groove (2-1), and the other side of the first elastic pad (3) is tightly fitted with the sleeper (1). The wedge-shaped groove (2-1) is provided with a limiting plate (2-2) near the end of the transverse baffle (5) to restrict the movement of the first elastic pad (3) when it comes into contact with the sleeper (1).

3. The longitudinal reinforcement device for railway sleepers according to claim 1, characterized in that, The vertical pile foundation (2) is provided with a first threaded hole group (2-3) for connection with the column base flange (4).

4. The longitudinal reinforcement device for railway sleepers according to claim 1, characterized in that, The transverse baffle (5) has a second threaded hole group (5-1) at both ends, which is connected to the vertical pile foundation (2) by bolts.

5. The longitudinal reinforcement device for railway sleepers according to claim 1, characterized in that, The transverse baffle (5) has transverse sawtooth grooves (5-2) at both ends near the vertical pile foundation (2), and the second elastic pad (6) is tightly fitted with the transverse baffle (5) through the sawtooth grooves (5-2).

6. The longitudinal reinforcement device for railway sleepers according to claim 5, characterized in that, The second elastic pad (6) is a serrated stepped type. The serrated part at the end of the second elastic pad (6) is used to fit tightly with the transverse serrated groove (5-2) of the transverse baffle (5). The protrusion between the two serrated parts of the second elastic pad (6) protrudes from the surface of the transverse baffle (5) and is used to fit tightly with the sleeper (1).

7. The longitudinal reinforcement device for railway sleepers according to claim 1, characterized in that, The horizontal baffle connection part has a 7-shaped structure and the free end of the horizontal part of the 7-shaped structure has an extension part. The outer right angle part formed by the connection between the vertical part of the 7-shaped structure and the T-shaped bolt connection part has a reinforcing rib.

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