High-strength sleeper of ballastless track

Abstract

The ballastless track high-strength sleeper comprises a sleeper body, a retaining shoulder and a track bearing face are integrally formed on the two sides of the top end of the sleeper body respectively, reserved holes are formed in the side face of the sleeper body, reinforcing steel bars can penetrate through the reserved holes, concrete can conveniently flow in the reserved holes, and the reserved holes penetrate through the side face of the sleeper body. Reinforcing steel bars are embedded in the retaining shoulders. According to the sleeper, the reinforcing steel bars are pre-buried in the retaining shoulder parts, so that the strength of the retaining shoulder parts is improved, and the situation that the retaining shoulders crack to affect driving safety is avoided; and moreover, the longitudinal steel bars can penetrate through the preformed holes, and concrete can flow into the preformed holes when a ballast bed is poured, so that the sleeper and the ballast bed are poured into a whole, the bonding performance of a new and old concrete bonding surface can be greatly enhanced, the situations of looseness, cracking and the like between the sleeper and the ballast bed are avoided, the stability of the sleeper is ensured, and the driving safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rail transportation, and more specifically to a high-strength sleeper for a ballastless track. Background Art

[0002] The ballastless track structure commonly used in high-speed railways in the prior art has the advantages of strong durability, less maintenance workload, low maintenance cost, good track structure stability, continuity and smoothness, etc. However, the sleepers for ballastless tracks are prone to separation from the bonding surface with the concrete ballast bed slab, loosening and cracking of the sleepers during use, resulting in the problem of instability of the sleepers for ballastless tracks.

[0003] In order to solve the above problems, the prior art such as CN109183525A-a ballastless track long sleeper suitable for tram groove rails, which includes a long sleeper body, both ends of the long sleeper body are provided with an integrally formed shoulder and rail-bearing surface, and the long sleeper body is provided with a reserved hole, a pre-embedded sleeve and a prestressed steel wire, wherein the reserved hole is arranged on the side of the long sleeper body and passes through the side of the long sleeper body; the pre-embedded sleeve is arranged below the rail-bearing surface; the prestressed steel wire longitudinally passes through the long sleeper body, and both ends of the prestressed steel wire extend to both ends of the long sleeper body. In the ballastless track long sleeper, the longitudinal steel bar passes through the reserved hole, and when pouring, the concrete flows into the reserved hole, which can enhance the bonding performance of the new and old concrete interface.

[0004] However, the shoulder of the sleeper is not reinforced. With long-term use, cracks are prone to appear on the shoulder, affecting driving safety. In addition, the bonding strength between the inner wall of the reserved hole and the concrete is not strong, and there is a gap between the bonding surfaces of the two, which reduces the integrity of the combination of the sleeper and the ballast, affecting the stability of the sleeper. In addition, due to geographical restrictions, there are generally stable track sections and unstable track sections in the track, and the unstable track section often cannot guarantee its stability, affecting the driving safety of the section.

[0005] Therefore, how to provide a high-strength sleeper for ballastless track that can improve the strength of the shoulder and avoid cracks in the shoulder that affect driving safety, and improve the bonding strength between the reserved hole and the concrete to avoid separation and gaps between the bonding surfaces of the two that affect the stability of the sleeper, and improve the stability of unstable track sections to ensure driving safety is a problem that technical personnel in this field urgently need to solve. Utility Model Content

[0006] In view of this, the utility model provides a high-strength sleeper for ballastless track that improves the strength of the shoulder guard, avoids cracks in the shoulder guard and affects driving safety, and improves the bonding strength between the reserved hole and the concrete, avoids separation and gaps between the bonding surfaces of the two and affects the stability of the sleeper, and can improve the stability of unstable track sections to ensure driving safety.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A high-strength sleeper for ballastless track comprises: a sleeper body, wherein shoulders and rail-bearing surfaces are integrally formed on both sides of the top of the sleeper body, and reserved holes for passing reinforcing steel bars and facilitating the inflow of concrete are arranged on the sides of the sleeper body, wherein the reserved holes are arranged through the sides of the sleeper body, and reinforcing steel bars are pre-embedded in the shoulders.

[0009] It can be seen from the above technical solution that, compared with the prior art, the utility model discloses a high-strength sleeper for ballastless track, which improves the strength of the shoulder portion by pre-embedding reinforcing steel bars at the shoulder portion, thereby avoiding cracks in the shoulder portion and affecting driving safety; and, the longitudinal steel bars can pass through the reserved holes, which can not only improve the overall strength of the sleeper, but also allow concrete to flow into the reserved holes when the ballast bed is cast, so that the sleeper and the ballast bed are cast as one, greatly enhancing the bonding performance of the new and old concrete interface, avoiding looseness and cracking between the sleeper and the ballast bed, ensuring the stability of the sleeper, and improving driving safety.

[0010] Furthermore, the reserved hole is in a trumpet-mouth shape.

[0011] The beneficial effect of adopting the above technical solution is that the reserved hole is in a trumpet shape, so that the diameter of the reserved hole gradually increases from the first hole to the second hole, thereby improving the fluidity of concrete in the reserved hole, that is, when pouring the ballast bed, it is easy for concrete to flow in through the first hole and out through the second hole, so that the concrete can quickly fill the entire reserved hole, thereby enhancing the connection performance between the sleeper and the ballast bed.

[0012] Furthermore, two side surfaces of the sleeper body are rough surfaces.

[0013] The beneficial effect of adopting the above technical solution is that when the ballast bed is poured, the adhesion between the concrete and the two sides of the sleeper body can be improved, the gap phenomenon on the bonding surface can be avoided, and the stability of the connection between the ballast bed and the two sides of the sleeper can be ensured.

[0014] Furthermore, a plurality of protruding teeth are evenly distributed on the inner wall surface of the reserved hole for improving the adhesion between the inner wall surface of the reserved hole and concrete.

[0015] The beneficial effect of adopting the above technical solution is: improving the bonding force between the reserved hole and the concrete, avoiding separation and cracking of the bonding surfaces of the two, which affects the stability of the sleeper.

[0016] Furthermore, a plurality of first embedded sleeves for connecting with fasteners of the auxiliary rail are embedded in the sleeper body at a position between the two rail-bearing surfaces.

[0017] The beneficial effect of adopting the above technical solution is that after the auxiliary rail is installed, the unstable track structure can be transformed into a stable track structure, thereby ensuring the driving safety of the track.

[0018] Furthermore, a second embedded sleeve for connecting with a fastener of the rail is embedded in the sleeper body at a position below the rail bearing surface.

[0019] The beneficial effect of adopting the above technical solution is that the track is easy to install.

[0020] Furthermore, it also includes a prestressed steel wire that longitudinally penetrates the sleeper body, and both ends of the prestressed steel wire extend to the two ends of the sleeper body.

[0021] The beneficial effect of adopting the above technical solution is: pre-embedded prestressed steel wire in the sleeper not only improves the overall strength of the sleeper and extends its service life, but also reserves a section of the prestressed steel wire for connection with the concrete roadbed slab, thereby further strengthening the connection between the sleeper and the concrete roadbed slab and improving the stability of the connection between the sleeper and the roadbed. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0023] Figure 1 The present invention is a schematic diagram of the main structure of a first embodiment of a high-strength sleeper for a ballastless track provided by the utility model.

[0024] Figure 2 The utility model is a schematic diagram of a top view of the structure of a first embodiment of a high-strength sleeper for a ballastless track provided by the utility model.

[0025] Figure 3 The present invention is a schematic diagram of the main structure of a second embodiment of a high-strength sleeper for a ballastless track provided by the utility model.

[0026] Figure 4 The present invention is a schematic top view of the structure of a second embodiment of a high-strength sleeper for a ballastless track provided by the utility model.

[0027] Figure 5 The utility model provides a side view of the first embodiment and the second embodiment of the high-strength sleeper for ballastless track. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] See also Figure 1 , Figure 2 As shown, an embodiment of the utility model discloses a high-strength sleeper for ballastless track, comprising: a sleeper body 1, a shoulder 11 and a rail-bearing surface 12 are integrally formed on both sides of the top of the sleeper body 1, and a side of the sleeper body 1 is provided with a reserved hole 13 for passing reinforcing steel bars and facilitating the inflow of concrete, the reserved hole 13 is arranged through the side of the sleeper body 1, and reinforcing steel bars 2 are pre-embedded in the shoulder 11.

[0030] See also Figure 5 In a preferred embodiment, the reserved hole 13 is in a bell-mouth shape.

[0031] In a preferred embodiment, two side surfaces of the sleeper body 1 are rough surfaces 14 .

[0032] In a preferred embodiment, a plurality of protruding teeth 3 are evenly distributed on the inner wall surface of the reserved hole 13 for improving the adhesion between the inner wall surface of the reserved hole 13 and concrete.

[0033] See also Figure 3 and Figure 4 A plurality of first embedded sleeves 4 for connecting with the fasteners of the auxiliary rail are embedded in the position between the two rail bearing surfaces 12 inside the sleeper body 1 .

[0034] In the above embodiment, a second embedded sleeve 5 for connecting with a fastener of the rail is embedded in the sleeper body 1 below the rail bearing surface 12 .

[0035] The ballastless track high-strength sleeper further comprises a prestressed steel wire 6 which penetrates the sleeper body 1 longitudinally, and both ends of the prestressed steel wire 6 extend to both ends of the sleeper body 1 for arrangement.

[0036] The sleeper embeds reinforcing steel bars in the shoulder part, thereby improving the strength of the shoulder part and avoiding cracks in the shoulder part that affect driving safety; in addition, the longitudinal steel bars can pass through the reserved holes, and the reserved holes are in the shape of a bell mouth, so that when the ballast bed is poured, concrete can quickly flow into the small end (first end) of the bell mouth and flow out of the reserved hole (such as the large end (second end) of the bell mouth) through the large end (second end) of the bell mouth. Figure 5The sleeper and the ballast are cast as one, and the bonding performance of the new and old concrete joint surfaces is greatly enhanced to avoid loosening and cracking between the sleeper and the ballast, ensure the stability of the sleeper, and improve driving safety.

[0037] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0038] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high-strength sleeper for ballastless track, characterized in that: include: A sleeper body (1), wherein a shoulder (11) and a rail bearing surface (12) are integrally formed on both sides of the top of the sleeper body (1), and a side surface of the sleeper body (1) is provided with a reserved hole (13) for passing reinforcing steel bars and facilitating the inflow of concrete, the reserved hole (13) is arranged through the side surface of the sleeper body (1), and reinforcing steel bars (2) are pre-embedded in the shoulder (11).

2. The high-strength sleeper for ballastless track according to claim 1, characterized in that: The reserved hole (13) is in a trumpet-mouth shape.

3. The high-strength sleeper for ballastless track according to claim 1, characterized in that: The two side surfaces of the sleeper body (1) are rough surfaces (14).

4. A ballastless track high-strength sleeper according to any one of claims 1 to 3, characterized in that: A plurality of convex teeth (3) are evenly distributed on the inner wall surface of the reserved hole (13) for improving the adhesion between the inner wall surface of the reserved hole (13) and concrete.

5. A ballastless track high-strength sleeper according to any one of claims 1 to 3, characterized in that: A plurality of first embedded sleeves (4) for connecting with fasteners of the auxiliary rail are embedded in the sleeper body (1) at a position between the two rail-bearing surfaces (12).

6. A ballastless track high-strength sleeper according to any one of claims 1 to 3, characterized in that: A second embedded sleeve (5) for connecting with a fastener of the rail is embedded in the sleeper body (1) at a position below the rail bearing surface (12).

7. A ballastless track high-strength sleeper according to any one of claims 1 to 3, characterized in that: It also comprises a prestressed steel wire (6) which longitudinally penetrates the sleeper body (1), and both ends of the prestressed steel wire (6) extend to both ends of the sleeper body (1).

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