Design of Operation Inspection Garage Clearance Height for Metro Vehicle Bases with Overhead Property Development

Abstract

Objective The development of overhead property in urban rail transit vehicle bases becomes a basic requirement for vehicle base design in many cities such as Shanghai and Beijing. To effectively address the impact of overhead property development on the covered garage s, it is necessary to study the clearance height of operation inspection garage. Method Taking the operation garage and the joint garage of vehicle base as research objects, the main factors affecting the clearance height of vehicle base garage with overhead property are analyzed, and the design process of operation inspection garage clearance height is sorted. Calculation methods for operation inspection garage clearance height under overhead catenary system and third contact rail system are proposed respectively. Result & Conclusion When using overhead catenary system, factors such as the height and safety distance of catenary wires, the top elevation of crane running track, the crane height, the overhead pipeline layer height, and structural main beam height need to be considered. The minimum height of the first-floor slab of parking inspection garage is 7.5 m; for inspection garages (excluding parking inspection and temporary repair garages), the first-floor slab height is uniformly set at 8.5 m; the minimum height of the first-floor slab of temporary repair garage is 13.5 m. When using contact rail system, apart from the height of catenary wires, the other influencing factors are consistent with the overhead catenary system. The first-floor slab heights of parking inspection and weekly/monthly inspection garages are 7.5 m and 8.5 m respectively.

Keywords

• metro
• vehicle base
• overhead property development
• operation inspection garage
• clearance height