上导梁式架桥机在施工中有一个重要工况是喂梁,喂梁工序的第一步是由导梁上的前起重台车吊起预架梁的前端并向前纵向移动,此时为避免钢丝绳斜拉及超载,必须在梁后端配合以推动装置携梁与前起重台车同步运动,直到导梁上的后起重台车吊起梁后端为止。对300t以内轻中型梁的运送,由 In the construction of the girder bridge girder erection of an important condition is to feed the beam, the first step in the beaming process is the front lifting beam on the guide beam lifting the front end of the pre-beam and move forward longitudinally, At this time, in order to avoid cable pulling and overloading, the rear end of the beam must cooperate to push the device to carry the beam and the front lifting trolley to move synchronously until the rear lifting trolley on the guide beam lifts the rear end of the beam. Lightweight medium 300t within the beam from