Prestressed concrete sleeper with built-in stress buffer layer

Abstract

The utility model relates to a sleeper technical field, specifically disclose a built-in stress buffer layer's prestressed concrete sleeper, including the sleeper body, the inside of sleeper body is provided with a plurality of reinforcing steel bars, the end face of sleeper body is provided with two recesss, a plurality of reinforcing steel bars arc surface all set up with stress buffer layer body, the inner wall of recess is provided with two rectangle grooves, the inner wall of rectangle groove is installed with the mounting piece, the surface of mounting piece is embedded with the threaded tube. The utility model discloses through stress buffer layer body, selects polyurethane material, and has the characteristics of high elasticity and high strength, and the oil resistance, wear resistance, good ageing resistance, can relieve stress concentration and vibration impact, through the stress buffer layer body set up in the reinforcing steel bar inside sleeper body, can relieve the stress concentration of reinforcing steel bar and concrete because of elastic modulus difference to some extent, avoids the emergence of the situation that concrete is locally crushed or reinforcing steel bar around cracks.

Description

Technical Field

[0001] This utility model belongs to the field of railway sleeper technology, specifically relating to a prestressed concrete railway sleeper with a built-in stress buffer layer. Background Technology

[0002] Railway sleepers are important components laid on railway lines, mainly used to support the steel rails. When sleepers are affected by factors such as train loads, temperature changes, and foundation settlement, tensile stress is easily generated. Reinforcing bars are installed inside the sleepers to bear the tensile stress inside the sleepers, preventing the concrete from cracking due to tension, thereby improving the overall load-bearing capacity of the sleepers.

[0003] Chinese patent CN222631969U discloses a railway sleeper. The specification states that railway rails are fixed to the sleeper using fasteners. Anchor bolts in the fasteners need to be threaded into the sleeper. Typically, a threaded sleeve is pre-embedded during the sleeper's casting process to connect with the anchor bolts. The sleeve is made of high-strength plastic and possesses a certain strength and elasticity. However, the sleeve is prone to damage during use, especially on tracks with small curve radii. Therefore, damaged sleeves need to be inspected and replaced regularly to ensure railway operational safety. Replacing the sleeve requires first removing the original sleeve embedded in the concrete sleeper. This is usually done by drilling a hole with a water drill, then breaking it up with tools and prying it out before embedding the new sleeve. This process is not only time-consuming and labor-intensive but also poses safety hazards. If the mounting hole is damaged, the entire sleeper needs to be replaced, increasing maintenance costs.

[0004] In the aforementioned application, the locking component is inserted into the body through the limiting hole and partially placed in the mounting groove. Limiting grooves are provided on opposite sides of the carrier. The portion of the locking component placed in the mounting groove is precisely locked in the limiting groove, thus locking the carrier. Although this achieves the effect of quick installation, the locking component is firmly locked in the limiting hole and has no protruding part. When it needs to be replaced and disassembled, it is not convenient to pull the locking component out of the limiting hole, making it inconvenient for workers to replace it. Utility Model Content

[0005] The purpose of this invention is to provide a prestressed concrete sleeper with a built-in stress buffer layer to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A prestressed concrete sleeper with a built-in stress buffer layer includes a sleeper body, the sleeper body having multiple reinforcing bars inside, two grooves on the end face of the sleeper body, a stress buffer layer body being fitted onto the arc surface of each of the multiple reinforcing bars, two rectangular grooves on the inner wall of the grooves, and mounting components being installed on the inner wall of the rectangular grooves, with threaded tubes embedded on the surface of the mounting components.

[0007] Preferably, rectangular holes are provided on both sides of the inner wall of the rectangular groove, square grooves are provided at both ends of the mounting component, springs are fixedly connected to the inner walls of the two square grooves, and a locking block is fixedly connected to the ends of the two springs that are far apart from each other.

[0008] Preferably, the stress buffer layer body is made of a polymer elastic material.

[0009] Preferably, the card block is slidably connected to the inner wall of the square groove, and the size of the card block is adapted to the size of the rectangular hole.

[0010] Preferably, both the card block and the mounting component are made of metal.

[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model uses a stress buffer layer body made of polyurethane, which has the characteristics of high elasticity and high strength, and good oil resistance, wear resistance and aging resistance. It can alleviate stress concentration and vibration impact. By fitting the stress buffer layer body onto the steel bars inside the sleeper body, it can alleviate stress concentration caused by the difference in elastic modulus between the steel bars and concrete to a certain extent, and avoid the situation of local crushing of concrete or cracking around the steel bars.

[0012] 2. This utility model utilizes the elastic force of a spring to secure the mounting component in the rectangular groove, achieving the effect of quick assembly and disassembly of the mounting component. When the threaded sleeve is damaged, the staff only needs to remove the entire mounting component for replacement. Replacement is convenient and maintenance costs are low, minimizing the need to drill holes in the sleeper to remove the threaded sleeve. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This utility model Figure 1 A schematic diagram of the cross-sectional planar structure; Figure 3 This utility model Figure 1 A partial diagram of the split structure; Figure 4 This is a schematic diagram showing the disassembled structure of the mounting component and the card block of this utility model.

[0014] In the diagram: 1. Sleeper body; 2. Groove; 3. Stress buffer layer body; 4. Rectangular groove; 5. Rectangular hole; 6. Mounting component; 7. Square groove; 8. Threaded pipe; 9. Spring; 10. Locking block. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Reference Figures 1-4 As shown, this utility model provides a prestressed concrete sleeper with a built-in stress buffer layer, including a sleeper body 1. The sleeper body 1 has multiple reinforcing bars inside. Two grooves 2 are opened on the end face of the sleeper body 1. The arc surfaces of the multiple reinforcing bars are fitted with stress buffer layer bodies 3. Two rectangular grooves 4 are opened on the inner wall of the grooves 2. An installation part 6 is installed on the inner wall of the rectangular grooves 4. A threaded tube 8 is embedded on the surface of the installation part 6. During manufacturing, a concave hole is opened on the surface of the installation part 6, and the threaded tube 8 is placed into the concave hole and fixed by welding.

[0017] In this embodiment, the stress buffer layer body 3 is made of a high-molecular elastic material, specifically a polyurethane material, which has the characteristics of high elasticity and high strength, and good oil resistance, wear resistance and aging resistance. It can alleviate stress concentration and vibration impact. By fitting the stress buffer layer body 3 onto the steel bars inside the sleeper body 1, it can alleviate the stress concentration caused by the difference in elastic modulus between the steel bars and concrete to a certain extent, and avoid the situation where the concrete is locally crushed or the steel bars crack.

[0018] Polyurethane materials have a low modulus of elasticity, which allows them to absorb load energy through their own deformation, slowing down the rate at which stress is transferred to concrete and reducing peak stress.

[0019] In an optional embodiment: rectangular holes 5 are provided on both sides of the inner wall of the rectangular groove 4, and square grooves 7 are provided at both ends of the mounting member 6. Springs 9 are fixedly connected to the inner walls of the two square grooves 7, and locking blocks 10 are fixedly connected to the ends of the two springs 9 that are far apart from each other. The locking blocks 10 are slidably connected to the inner walls of the square grooves 7. The size of the locking blocks 10 is adapted to the size of the rectangular holes 5. Both the locking blocks 10 and the mounting member 6 are made of metal.

[0020] It should be noted that the two square slots 7 on the mounting part 6 are not connected. The threaded tube 8 is embedded in the mounting part 6 to form a whole. The mounting part 6 is installed into the rectangular slot 4 pre-reserved on the sleeper body 1 by embedding and locked by the engagement of the locking block 10 and the rectangular hole 5. When the threaded tube 8 is damaged, the staff only needs to remove the threaded tube 8 as a whole for replacement. Replacement is convenient and maintenance cost is low.

[0021] The working principle of this utility model is as follows: During use, the operator presses the two locking blocks 10 on the mounting piece 6 towards each other. The locking blocks 10 will slide along the inner wall of the square groove 7. At this time, the spring 9 will be in a compressed state. After the locking blocks 10 retract into the square groove 7, the mounting piece 6 is pressed into the rectangular groove 4. When the square groove 7 and the rectangular hole 5 are aligned, the compressed spring 9 will rebound, and the locking blocks 10 will slide out again and lock into the rectangular hole 5 to stabilize the position of the mounting piece 6. Similarly, during disassembly, the two locking blocks 10 are pushed towards each other, so that the locking blocks 10 slide back into the square groove 7 and disengage from the rectangular hole 5, and the mounting piece 6 can be pulled out.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A prestressed concrete railway sleeper with a built-in stress buffer layer, comprising a sleeper body (1), wherein the sleeper body (1) is provided with a plurality of steel bars, and two grooves (2) are formed on the end face of the sleeper body (1), characterized in that, The arc surfaces of multiple steel bars are fitted with stress buffer layer bodies (3), and the inner wall of the groove (2) has two rectangular grooves (4). The inner wall of the rectangular grooves (4) is fitted with mounting parts (6), and the surface of the mounting parts (6) is embedded with threaded pipes (8). The inner walls of the rectangular groove (4) are provided with rectangular holes (5) on both sides, and the two ends of the mounting part (6) are provided with square grooves (7). The inner walls of the two square grooves (7) are fixedly connected with springs (9), and the ends of the two springs (9) that are far apart from each other are fixedly connected with blocks (10). The card block (10) is slidably connected to the inner wall of the square groove (7), and the size of the card block (10) is adapted to the size of the rectangular hole (5); Both the card block (10) and the mounting component (6) are made of metal.

2. The prestressed concrete sleeper with a built-in stress buffer layer according to claim 1, characterized in that: The stress buffer layer body (3) is made of a polymer elastic material.

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