A new type of prestressed concrete sleeper

Abstract

This utility model discloses a novel prestressed concrete railway sleeper, comprising a sleeper body laid on the railway track bed, a reinforcing cage inside the sleeper body for increasing strength, two diagonally distributed "J"-shaped pre-embedded bolt assemblies located inside the sleeper body and extending upwards to both sides of the rail mounting position, two diagonally distributed fixing holes on the upper surface of the sleeper body located on both sides of the rail mounting position, a steel base fixed to the upper surface of the sleeper body by the pre-embedded bolt assemblies, and a steel pad installed on the upper end of the steel base through the fixing holes. This novel prestressed concrete railway sleeper effectively improves the track geometry retention capacity and load-bearing strength of the sleeper body; moreover, the two-layer steel plate structure has suitable deformation capacity, attenuating the impact energy transmitted to the concrete sleeper, greatly reducing the ballast pulverization rate, and ensuring safe vehicle operation.

Description

Technical Field

[0001] This utility model relates to the field of railway transportation technology, and in particular to a novel prestressed concrete sleeper. Background Technology

[0002] With the continuous development of industry and the increasing demand for fast and convenient travel, heavy-haul railways and high-speed railways are also experiencing a period of rapid development. Track is a crucial infrastructure in railway construction, and a sound track structure is an important guarantee for safe, reliable, comfortable, and efficient railway operation.

[0003] The sleeper is a key component of the track structure, ensuring the stable and rapid operation of trains. Its main functions include two aspects: firstly, bearing the loads from the rails in all directions and transmitting them to the underlying track bed; secondly, effectively maintaining the geometric shape of the railway line, such as track gauge and alignment.

[0004] Existing prestressed concrete sleepers have advantages such as high load-bearing capacity, strong stability, and good track smoothness, but they also have the following disadvantages:

[0005] 1. Under long-term fatigue load from trains, concrete sleepers experience significant wear on the rail-bearing surface, which affects the sleeper's ability to maintain track geometry and its load-bearing strength.

[0006] 2. Concrete sleeper structures have poor elasticity. During the interaction between the wheels and the rails, the impact energy transmitted to the concrete sleepers is high, which makes the sleepers prone to cracking, chipping, and other damage, affecting their performance.

[0007] 3. Concrete sleepers have poor attenuation performance against external loads, which increases the pressure and vibration acceleration on the track bed, thereby exacerbating ballast pulverization, causing increased track subsidence, and adversely affecting the running gear of locomotives and rolling stock. Utility Model Content

[0008] In view of this, the present invention provides a novel prestressed concrete sleeper to solve the technical problems mentioned in the background art.

[0009] This utility model solves the above problems through the following technical means:

[0010] This utility model discloses a novel prestressed concrete railway sleeper, comprising a sleeper body laid on a railway track bed, a reinforcing cage for increasing strength disposed inside the sleeper body, two diagonally distributed "J"-shaped pre-embedded bolt assemblies disposed inside the sleeper body and extending upwards to both sides of the rail installation position, two diagonally distributed fixing holes disposed on the upper surface of the sleeper body on both sides of the rail installation position, a steel base fixed to the upper surface of the sleeper body by the pre-embedded bolt assemblies, and a steel pad installed on the upper end of the steel base through the fixing holes.

[0011] Preferably, the sleeper body includes a sleeper protrusion and a sleeper recess, and the sleeper protrusion is the rail mounting position.

[0012] Preferably, the connection between the convex portion and the concave portion of the pillow is a smooth transition, specifically a straight smooth transition or an arc smooth transition.

[0013] Preferably, the nuts of the pre-embedded bolt assembly include a leveling nut located at the lower end of the steel base and a fastening nut located at the upper end of the steel base.

[0014] Preferably, the steel base is provided with pre-embedded pads at both ends and the bottom for limiting its position.

[0015] Preferably, there are one or more sets of the pre-embedded bolt assembly and the fixing holes, and they are arranged sequentially along the width direction of the sleeper body.

[0016] Preferably, the overall structure of the sleeper body is a trapezoidal structure that is larger at the bottom and smaller at the top.

[0017] Preferably, functional grooves are formed on the two inclined surfaces of the sleeper body.

[0018] As can be seen from the above technical solution, this utility model has the following beneficial effects:

[0019] This novel prestressed concrete sleeper features two "J"-shaped pre-embedded bolt assemblies with their bends facing downwards, vertically inserted into the template of the sleeper body for casting. This ensures a more robust and reliable connection between the pre-embedded bolt assemblies, allowing the steel base to be stably fixed to the upper surface of the sleeper body. A steel pad is then installed on the upper end of the steel base through fixing holes. This two-layer steel plate structure protects the rail-bearing surface of the sleeper body, reducing wear on the rail-bearing surface and effectively improving the sleeper body's track geometry retention capacity and load-bearing strength. Furthermore, the two-layer steel plate structure has suitable deformation capacity, attenuating the impact energy transmitted to the concrete sleeper during the interaction between the wheel and the rail. This reduces the damage caused by the enormous impact energy to the sleeper body, significantly reducing the ballast pulverization rate and ensuring safe vehicle operation. Attached Figure Description

[0020] Figure 1 This is a structural schematic diagram of the novel prestressed concrete sleeper for a double-track railway according to this utility model.

[0021] Figure 2 This is a schematic diagram of the structure of a novel prestressed concrete sleeper for a double-track railway with a set of pre-embedded bolt assemblies and fixing holes.

[0022] Figure 3This is a schematic diagram of the structure of a novel prestressed concrete sleeper for a double-track railway with two sets of pre-embedded bolt assemblies and fixing holes according to the present invention.

[0023] Figure 4 This is a structural schematic diagram of the novel prestressed concrete sleeper for monorail railways according to this utility model.

[0024] like Figures 1-4 The components are: sleeper body-1, sleeper protrusion-11, sleeper recess-12, steel cage-2, embedded bolt assembly-3, leveling nut-31, fastening nut-32, fixing hole-4, steel base-5, steel pad-6, clamping structure-61, embedded pad-7, functional groove-8, rubber pad-9, and rail-10. Detailed Implementation

[0025] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0027] Example 1

[0028] like Figures 1 to 4 As shown: The novel prestressed concrete sleeper described in this embodiment includes a sleeper body 1 laid on the railway track bed, a reinforcing cage 2 set inside the sleeper body 1 for improving strength, two diagonally distributed "J"-shaped pre-embedded bolt assemblies 3 set inside the sleeper body 1 and extending upwards on both sides of the rail 10 installation position, two diagonally distributed fixing holes 4 on the upper surface of the sleeper body 1 on both sides of the rail 10 installation position, a steel base 5 fixed to the upper surface of the sleeper body 1 by the pre-embedded bolt assemblies 3, and a steel pad 6 installed on the upper end of the steel base 5 through the fixing holes 4.

[0029] During the installation process, firstly, place a rubber pad 9 on the upper end of the installed steel base 5 and steel pad 6, then place the steel rail 10 on the rubber pad 9, and finally press and fix the steel rail 10 by the pressing structure 61 on the steel pad 6.

[0030] The novel prestressed concrete sleeper described in this embodiment features two "J"-shaped pre-embedded bolt assemblies 3 with their bends facing downwards, vertically inserted into the template of the sleeper body 1 for casting. This makes the connection of the pre-embedded bolt assemblies 3 more robust and reliable. Therefore, the steel base 5 can be stably fixed to the upper surface of the sleeper body 1. Then, a steel pad 6 is installed on the upper end of the steel base 5 through the fixing holes 4. The two-layer steel plate structure can protect the rail-bearing surface of the sleeper body 1, reduce wear on the rail-bearing surface, and effectively improve the track geometry retention capacity and load-bearing strength of the sleeper body 1. Moreover, the two-layer steel plate structure has suitable deformation capacity, which attenuates the impact energy transmitted to the concrete sleeper during the interaction between the wheel and the rail 10, reducing the damage caused by the huge impact energy to the sleeper body 1, thereby greatly reducing the ballast pulverization rate and ensuring safe vehicle operation.

[0031] In specific implementation, the sleeper body 1 includes a sleeper protrusion 11 and a sleeper recess 12, and the sleeper protrusion 11 is the installation position of the rail 10. While ensuring the load-bearing capacity of the sleeper body 1, the amount of concrete used is saved and the overall weight is reduced.

[0032] In a preferred embodiment of this invention, the connection between the convex portion 11 and the concave portion 12 is a smooth transition, specifically a straight smooth transition or an arc smooth transition.

[0033] In a preferred embodiment of this invention, the nuts of the pre-embedded bolt assembly 3 include a leveling nut 31 located at the lower end of the steel base 5 and a fastening nut 32 located at the upper end of the steel base 5, which can level and fix the steel base 5 as needed to adapt to different working conditions.

[0034] In a preferred embodiment of this invention, the steel base 5 is provided with embedded pads 7 at both ends and the bottom for limiting its position. The embedded pads 7 are cast into the concrete of the sleeper body 1 and become an integral part of the sleeper body 1, thereby strengthening the support and limiting of the steel base 5, avoiding direct contact between the steel base 5 and the concrete of the sleeper body 1, and reducing the impact energy generated by the vibration of the rail 10 that could damage the concrete at that location.

[0035] In a preferred embodiment of this invention, the pre-embedded bolt assembly 3 and the fixing holes 4 are arranged in one or more sets, sequentially along the width direction of the sleeper body 1, and different sleepers are selected for laying as needed. Taking a double-track railway sleeper as an example, a set of the pre-embedded bolt assembly 3 and the fixing holes 4 is used at the lower end of the same rail 10, such as... Figure 2 As shown; at the joint of the two rails 10, multiple sets of the pre-embedded bolt assemblies 3 and the sleepers with the fixing holes 4 are used, such as Figure 3 As shown, this fixes and supports the ends of the two rails 10 respectively, thereby enhancing the load-bearing capacity of the sleeper and the stability of the rail 10 joint.

[0036] As a preferred embodiment of this invention, the overall structure of the sleeper body 1 is a trapezoidal structure that is larger at the bottom and smaller at the top. This structure saves on concrete usage and reduces the overall weight while ensuring the load-bearing capacity of the sleeper body 1.

[0037] As a preferred embodiment of this invention, functional slots 8 are provided on the inclined surfaces on both sides of the sleeper body 1, which can hold functional nameplates, such as positioning plates and specification plates, to facilitate the identification of information of the sleeper body 1, and the nameplates are easy to replace if damaged.

[0038] Example 2

[0039] The novel prestressed concrete sleeper described in this embodiment has the same technical features as that in Embodiment 1, which will not be repeated here. Figures 1-3 As shown, this is a prestressed concrete sleeper for a double-track railway. The sleeper body 1 includes a central sleeper protrusion 11 and sleeper recesses 12 with an inclined structure symmetrically arranged on both sides of the sleeper protrusion 11.

[0040] Example 3

[0041] The novel prestressed concrete sleeper described in this embodiment has the same technical features as that in Embodiment 1, which will not be repeated here. Figure 4 As shown, this is a prestressed concrete sleeper for a monorail railway. The sleeper body 1 includes a central sleeper recess 12 and sleeper protrusions 11 symmetrically arranged on both sides of the sleeper recess 12.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A novel prestressed concrete railway sleeper, characterized in that: The system includes a sleeper body laid on the railway track bed, a reinforcing cage inside the sleeper body for increasing strength, two diagonally distributed "J"-shaped pre-embedded bolt assemblies inside the sleeper body and extending upwards to both sides of the rail mounting position, two diagonally distributed fixing holes on the upper surface of the sleeper body on both sides of the rail mounting position, a steel base fixed to the upper surface of the sleeper body by the pre-embedded bolt assemblies, and a steel pad installed on the upper end of the steel base through the fixing holes.

2. The novel prestressed concrete sleeper according to claim 1, characterized in that: The sleeper body includes a sleeper protrusion and a sleeper recess, and the sleeper protrusion is the rail mounting position.

3. A novel prestressed concrete sleeper according to claim 2, characterized in that: The connection between the convex portion and the concave portion of the pillow is a smooth transition, specifically a straight smooth transition or an arc smooth transition.

4. A novel prestressed concrete sleeper according to claim 1, characterized in that: The nuts of the pre-embedded bolt assembly include a leveling nut located at the lower end of the steel base and a fastening nut located at the upper end of the steel base.

5. A novel prestressed concrete sleeper according to claim 1, characterized in that: The steel base is provided with embedded pads at both ends and the bottom for limiting its position.

6. A novel prestressed concrete sleeper according to claim 1, characterized in that: The pre-embedded bolt assembly and the fixing holes are arranged in one or more sets, and are arranged sequentially along the width direction of the sleeper body.

7. A novel prestressed concrete railway sleeper according to claim 1, characterized in that: The overall structure of the sleeper body is a trapezoidal structure that is larger at the bottom and smaller at the top.

8. A novel prestressed concrete railway sleeper according to claim 1, characterized in that: Functional grooves are provided on the two inclined surfaces of the sleeper body.

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