701大桥的双线铁路桥面需要的枕木有十种类型,七千五百多根。其中主要的有四种类型:甲型铺装在全桥普通纵梁处,乙型铺装在鱼尾钣处,丙型铺装在纵梁平联节点处,丁型铺装在横梁处。例如丙型枕木就要刻两道槽口:第一道槽口是枕木和纵梁盖钣接触处的槽口,刻槽深度因枕木高度公差而异,主要要保 There are ten types of sleepers required for the 701 double bridge deck, more than 7,500. There are four main types: A-type pavement in the bridge general beam, B-type fish at the end of the sheet metal, C-type pavement in the parallel joints, Ding-type pavement at the beam. For example, the c-type sleepers should engrave two notches: the first notch is the notch at the contact of the sleeper and the stringer cover, the depth of the notch varies with the height tolerance of the sleepers,