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 39
- Downloads 0
Research on Measurement Method of Wheel-rail Vertical Force of Urban Rail Transit
[Objective] A large number of tunnel diseases usually occur during the operation of urban rail transit, and the main cause of the diseases is the wheel-rail force. Therefore, it is necessary to study the method of measur...
Application of New Electricity Saving Technology in Urban Rail Transit Depot
[Objective] The electricity consumption in vehicle depot accounts for a large proportion of the total in urban rail transit. In order to reduce the depot electricity consumption, it is necessary to do research on the app...
Flexural Performance of Mortise-tenon Prestressed Bolt Joints in Prefabricated Station Structure
Objective The rationality of joint structures is crucial for station safety. Therefore, it is necessary to study the enhancement effect of additional prestressing measures on the flexural performance of prefabricated sta...
Numerical Analysis of Smoke Temperature Characteristics below the Fire Ceiling in Main Transformer Room of Urban Rail Transit Substation
Objective With the increasing power supply load required by metro, the operation of oil-immersed equipment such as wet-type transformers under overload conditions is extremely prone to fire, posing a threat to the safety...
Harmonic Detection and Suppression Method for High-speed Maglev Trains Based on Adaline Algorithm
[Objective] In order to reduce the impact of high-speed maglev harmonics on traction network, and to ensure the normal operation of high-speed maglev trains, it is necessary to study the harmonic characteristics of the h...