Adaptability of Prefabricated Track Slab Dimensions to Track Alignments in Urban Rail Transit
Journal Title: Urban Mass Transit - Year 2024, Vol 27, Issue 7
Abstract
Objective By investigating the adaptability relationship between prefabricated track slab dimensions and track alignments, and proposing reasonable prefabricated slab dimensions based on corresponding constraints, a basis for the engineering design and standardization of prefabricated track slabs is provided. Method Prefabricated track slabs can achieve planar curve alignment through substituting straight segments for curved segments and adjusting fasteners laterally. Construction of transition curve and vertical curve alignment is achieved through adjusting fasteners vertically. The expressions of the allowable lateral and vertical adjustment amounts of the fasteners in relation to slab length are derived based on geometric relationships. Through geometric relationships, the expression of the relationship between prefabricated slab length and width is determined based on the allowable value of slab gaps. Result & Conclusion Research shows that the track slab length limit is closely related to the allowable lateral and vertical adjustment amounts of the fasteners, while the alignment is not a limiting factor for prefabricated slab width. It is recommended to set the allowable lateral adjustment of fasteners to 2 mm, and the allowable vertical adjustment to 15 mm. For the same line, it is suggested that the specifications of prefabricated slab lengths should not exceed two types. When track curve radius is R ≥ 950 m, slabs with a length of 5.9 m are recommended. For curve radii 300 m ≤ R < 950 m, slabs with a length of 3.5 m are recommended. When R<300 m, fasteners with large lateral adjustment amount are recommended.
Authors and Affiliations
Haibin DUAN, Yuzhen DUAN, Peng CHEN
Keywords
Related Articles
- EP ID EP742615
- DOI 10.16037/j.1007-869x.2024.07.031
- Views 25
- Downloads 0
Study on the Balise Antenna Interference Problem on Nanjing Metro Line 7
Objective Due to the complex installation environment of the train in actual application, the balise antenna is subject to varying degrees of interference, sometimes even affecting its normal operation. Therefore, it is...
Simulation and Evaluation Model of Operation Delay Adjustment Plan for Urban Rail Transit Express and Local Trains
Objective Making a reasonable train delay adjustment plan is one of the key tasks to ensure the safe and reliable operation of urban rail transit lines. For those lines with express and local trains running on, it is nec...
Conversion Conditions for Fixed Temperature Difference with Variable Water Supply Temperature and Large Temperature Difference Control Strategies in Urban Rail Transit Station Air-conditioning Chilled Water System
Objective To achieve the lowest overall energy consumption of urban rail transit station air-conditioning chilled water system under both fixed temperature difference with variable water supply temperature and large temp...
Multi-objective Optimization of Combined Gray-green Infrastructure Rainwater System for Yuhuazhai Depot of Xi’an Metro
［Objective］ Acceleration of the urbanization process and frequent occurrence of urban flood disasters impose higher requirements on the rainwater system of urban rail transit depots. It is necessary to conduct a detail...
Real-time Fault Locating Method for Urban Rail Transit CBTC System
[Objective] To carry out rapid fault diagnosis and locating for urban rail transit CBTC (communication-based train control) system, a real-time fault monitoring and locating method based on time constraints is proposed,...