通过对顶推方向、顶推工法、顶推方案的选择,确定了主桥箱梁顶推拆除施工工艺。实践证明,在顶推过程中除受桥梁横坡影响主桥箱梁出现一定的偏移需进一步加强横向限位装置外一切正常,旧北江大桥主桥顶推拆除施工方案是科学可行的。 Through the selection of pushing direction, pushing method and pushing scheme, the construction technology of jacking of main box girder is determined. Practice has proved that during the thrusting process, except for the influence of the bridge cross-slope, a certain offset of the main bridge box girder needs to be further strengthened to make all the work outside the horizontal limit stop device normal. The construction plan of jacking and pushing off of the main bridge of the old Beijiang River Bridge is scientifically feasible.