Research and Application of Precast Slab Track in Urban Rail Transit Underground Line

Currently, urban rail transit generally adopts cast in situ ballastless track, which has problems of low accuracy in construction, low efficiency. While high speed railway CRTSⅢ slab ballastless track has high precision in construction, high efficiency and mature technology. Therefore high speed railway technology is introduced into urban rail transit domestically for the first time. On the basis of high speed railway CRTSⅢ slab, precast slab track applicable to urban rail transit is developed, to improve the quality of urban rail transit laying. Systematic and comprehensive research is conducted in urban rail transit precast slab track structure design, theoretical calculation, indoor test, manufacturing and construction technology of track slab. The research results have been widely applied in Shanghai rail transit and can be used as reference for similar projects.