Abstract:  To determine over contact system(OCS) suspension mode of metro vehicle base with upper cover platform and investigate the complete set of technical scheme of its installation and fixation, a case study is conducted on Shenzhen metro No.12 vehicle base, and suspensions methods of OCS are comprehensively compared from the perspectives of system reliability, operation and maintenance, and comprehensive construction costs, obtaining the technical and economic advantages of the rigid conduct wire. The cantilever structure of rigid conduct wire and embedded channel fixing method is adopted to fulfill the vehicle base line and environmental conditions. Then, the technical characteristics of embedded channel and the development and application of the municipal and rail transit industry are analyzed in detail. The installation of the cantilever structure of rigid conduct wire and embedded channel fixing under the upper cover platform is calculated to obtain the technical specifications of embedded channel. The embedded channel is compared with the traditional adhesive anchor in terms of technical and economic benefits, and the results show that the embedded channel is convenient in installation, low in cost, and short in construction period, which can fulfill the green construction requirements and the dynamic loadbearing requirements of OCS. Moreover, the specific technical scheme of embedded channel of rigid conduct wire is studied, the economic and reasonable process requirements and layout scheme are formulated, and the construction technology, precision control, and durability measures of embedded channel are examined in depth. Finally, suggestions are given to promote the application, and the directions of refinement design and deepening research are pointed out.

Key words: metro, vehicle base, upper cover platform, over contact system, rigid conduct wire,  , embedded channel, positioning flat steel, green construction