Lower base tool for bridge girder erection machine

The utility model discloses a lower base tool for a bridge girder erection machine, which comprises a base, reinforcing rods are arranged in the base, adjustable connecting units are detachably mounted at four corners of the top end of the base, and iron rods are connected with upper connecting pieces in the adjustable connecting units through bolts, so that the iron rods are transversely fixed on the lower base tool. And the lower connecting disc pair in the adjustable connecting unit is vertically fixed through screws, so that a single person can complete welding of the two iron rods, the mutual organization and assembly time of multiple persons is shortened, and the welding efficiency is improved. 本实用新型公开了一种用于架桥机的下底座工装,包括底座，所述底座内部设有加强杆，所述底座顶端四角可拆卸安装有可调节连接单元，铁杆通过螺栓与可调节连接单元中上连接件连接，使得铁杆横向固定在下底座工装上，可调节连接单元中下连接圆盘对通过螺钉铁杆竖向固定，进而使得单人可完成对两铁杆焊接，减少多人相互组织配时间，调高焊接效率。