前言由于码头作业繁忙,来往车辆密度较大,火车、汽车、门机同时作业,况且码头多散装货物,易于污染道床,在这种情况下,既无较长的时问间隔来从事轨道维修,更不可能封锁线路,只能要求轨道结构坚固耐久,线路维修量小,养护方便,尽量减少部件和零件的更换,因此,采用整体基础的轨道构造,具有显著的优越性。码头上采用整体道床的轨道构造,特别是整体道床道岔,由于整体性好,道床容易保持整洁,大大增强了线路的稳定性和减少养修工 Preface Due to the busy terminal operation, traffic between vehicles is large, and trains, cars and door machines work at the same time. Moreover, more bulk cargo at the terminals can easily contaminate the ballast beds. In this case, there is no longer time- It is even more impossible to block the circuit. Only the track structure is required to be robust and durable, the maintenance of the circuit is small, the maintenance is convenient, and the replacement of components and parts is minimized. Therefore, the overall foundation of the track structure has obvious advantages. Due to the good integrity, the track bed is easy to keep clean and tidy, greatly improving the stability of the line and reducing the maintenance workers