A track tie for a city railway
By optimizing the sleeper structure of the urban railway, increasing the width of the evacuation passage and the height of the lateral shoulder, and installing anti-crack steel bars in the lateral shoulder, the problem of poor connection performance between the sleeper and the track bed was solved, and the use effect and safety of the sleeper were improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA RAILWAY SHANGHAI DESIGN INST GRP CO LTD
- Filing Date
- 2025-05-15
- Publication Date
- 2026-06-02
AI Technical Summary
The existing SK-2 type double-block sleepers used by China Railway in urban railways have problems such as insufficient track bed evacuation width, insufficient lateral shoulder height, easy cracking, and poor connection performance between the sleeper and the track bed.
Design a railway sleeper for urban rail transit by increasing the width of the evacuation passage between sleeper blocks to more than 700mm, increasing the height of the transverse shoulder to 92.5mm, and setting anti-crack steel bars in the transverse shoulder. The connection between the sleeper block and the track bed is rounded and a rough surface is reserved.
It improved the evacuation performance of the track bed, met the height adjustment requirements of the urban rail fasteners, enhanced the safety of small-radius curve sections, and improved the connection performance between sleepers and track bed.
Smart Images
Figure CN224313966U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of rail transit engineering technology, specifically to a rail sleeper for urban railways. Background Technology
[0002] The existing SK-2 type double-block sleepers used by China Railway have a 120mm straight section on the inside of the rail for temporary stepping by workers during track bed construction. The width of the sleeper block in the middle is approximately 597mm. Referring to the "Metro Clearance Standard" (CJJ / T 96-2018), the width of the evacuation platform for a single line is generally 700mm, and 600mm in difficult situations. This means that the existing product only approaches the evacuation width requirement for difficult situations.
[0003] The WJ-8 type fasteners used in the SK-2 type double-block sleepers of China National Railway have a maximum height adjustment of 26mm under normal working conditions. Therefore, the design lateral shoulder height of the SK-2 type double-block sleepers of China National Railway is 77.5mm. The fastener height adjustment requirement for urban railways is 40mm, therefore the existing sleeper lateral shoulder height is insufficient.
[0004] The transverse shoulders of the SK-2 type double-block sleeper of China Railway have no steel reinforcement and are made of plain concrete, which is prone to cracking.
[0005] The connection between the sleeper block and the track bed is not rounded, and the part of the sleeper block embedded in the track bed is smooth. The connection performance between the sleeper and the track bed is poor and cracks are prone to occur.
[0006] Currently, there is an urgent need to redesign the aforementioned double-block sleepers to meet the needs of technological development. Summary of the Invention
[0007] The purpose of this utility model is to address the shortcomings of the existing technology by providing a railway sleeper for urban rail transit, thereby improving the sleeper's performance and effectiveness through optimized sleeper structure.
[0008] The objective of this utility model is achieved through the following technical solution:
[0009] A rail sleeper for urban rail transit includes two segmented sleeper blocks and connecting steel bars between the two sleeper blocks. The two sleeper blocks are connected by the connecting steel bars to form an integral structure. The sleeper blocks are characterized by having an evacuation passage with a width greater than 700mm between adjacent sides. A transverse shoulder is provided on the sleeper block, and the height of the transverse shoulder meets the requirement of 92.5mm for the installation of urban rail fasteners with a 40mm height adjustment.
[0010] Anti-crack reinforcing bars are provided inside the transverse shoulder.
[0011] The crack-resistant reinforcement includes 10mm steel bars arranged longitudinally along the line and 8mm steel bars that match the shape of the transverse shoulder.
[0012] The corners at the connection between the sleeper block and the track bed are rounded.
[0013] The sleeper block has a rough surface reserved in the part embedded in the track bed.
[0014] The advantages of this utility model are: the double-block sleeper of the urban rail improves the evacuation performance of the track bed by reducing the straight section of the sleeper block, and the width of the evacuation channel in the middle of the track bed is greater than 700mm, which meets the requirements; the increased transverse shoulder meets the height adjustment requirements of the urban rail fastener; the addition of anti-crack steel bars in the transverse shoulder improves the safety of small radius curve sections; the sleeper block adopts rounded corners and rough surface measures, which improves the connection performance between the sleeper and the track bed. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of this utility model;
[0016] Figure 2 This is a schematic diagram of the transverse shoulder structure in this utility model;
[0017] Figure 3 This is a schematic diagram of the internal reinforcement of the railway sleeper in this utility model. Detailed Implementation
[0018] The features and other related features of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments, so as to facilitate the understanding of those skilled in the art:
[0019] like Figure 1-3 As shown in the figure, the labels represent: sleeper block 1, transverse shoulder 2, connecting steel bar 3, first anti-crack steel bar 4, second anti-crack steel bar 5.
[0020] Example: Figures 1 to 3 As shown, in this embodiment, the sleepers used for the urban rail system include two sleeper blocks 1, and each of the two sleeper blocks 1 is provided with a transverse shoulder 2. The rail can be installed on the transverse shoulder 2 through urban rail fasteners, and the transverse shoulder 2 can play a transverse limiting role for the rail through the fasteners.
[0021] In this embodiment, as Figure 1 As shown, without significantly affecting the track bed construction, by reducing the straight section of sleeper block 1, the width of the evacuation channel between sleeper blocks is made greater than 700mm. Therefore, the straight section of the urban rail double-block sleeper is adjusted to 50mm, which improves the evacuation function of the track bed.
[0022] In this embodiment, combined with Figure 1 and Figure 2 As shown, the height adjustment of the city's iron fasteners under normal working conditions has been increased from 26mm to 40mm. Therefore, the horizontal shoulder 2 is increased by 15mm, that is, 92.5mm.
[0023] like Figure 3 As shown, in order to improve the performance of the transverse shoulder 2 and further enhance the safety of small-radius curve sections, anti-crack reinforcement is installed inside the transverse shoulder 2, including a first anti-crack reinforcement 4 and a second anti-crack reinforcement 5. The first anti-crack reinforcement 4 is a reinforcement arranged along the track direction, and the second anti-crack reinforcement 5 is located between the transverse shoulder 2 and the body of the sleeper block 1, and its shape matches that of the transverse shoulder 2.
[0024] In this embodiment, the corners at the connection between the sleeper block 1 and the track bed are rounded, and the sleeper block 1 is embedded in the track bed with a rough surface reserved, thereby improving the connection performance between the sleeper and the track bed.
[0025] Although the above embodiments have described the concept and embodiments of the present invention in detail with reference to the accompanying drawings, those skilled in the art will recognize that various improvements and modifications can still be made to the present invention without departing from the scope of the claims, and therefore will not be elaborated here.
Claims
1. A rail sleeper for urban rail transit, comprising two segmented sleeper blocks and connecting steel bars between the two sleeper blocks, wherein the two sleeper blocks are connected by the connecting steel bars to form an integral structure, characterized in that: An evacuation passage with a width greater than 700mm is left between adjacent sides of the two sleeper blocks; a transverse shoulder is provided on the sleeper block, and the height of the transverse shoulder meets the 92.5mm requirement for the installation of the municipal railway fastener with a 40mm height adjustment.
2. A rail sleeper for urban rail transit according to claim 1, characterized in that: Anti-crack reinforcing bars are provided inside the transverse shoulder.
3. A rail sleeper for urban rail transit according to claim 2, characterized in that: The crack-resistant reinforcement includes 10mm steel bars arranged longitudinally along the line and 8mm steel bars that match the shape of the transverse shoulder.
4. A rail sleeper for urban rail transit according to claim 1, characterized in that: The corners at the connection between the sleeper block and the track bed are rounded.
5. A rail sleeper for urban rail transit according to claim 1, characterized in that: The sleeper block has a rough surface reserved in the part embedded in the track bed.