城市轨道交通地下线一般采用整体道床结构形式,整体道床有结构稳定、养护维修工作量少等优点,但水的危害同样不可避免地存在着。整体道床表面的水禁止流入或渗入道床内部,需专门进行道床排水设计,保证排水的通畅。主要介绍整体道床排水设计的接口及局部特殊排水设计。 Urban rail transit underground track generally use the overall structure of the track bed structure, the overall track bed has the advantages of structural stability, maintenance and repair work less, but the same hazard of water there is still inevitable. The water on the surface of the whole ballast bed shall not be allowed to inflow or infiltrate the inside of the ballast bed, and the ballast bed design shall be specially designed to ensure the smooth drainage. The main introduction of the overall design of the Road bed drainage interface and local special drainage design.