Bridge pier reinforcement cage carriage widening component and carriage thereof

The pier reinforcement cage carriage widening component comprises a horizontal plate body, a sleeving cylinder and a second inserting cylinder, the sleeving cylinder is fixedly arranged at one end of the bottom face of the horizontal plate body, an inserting hole is formed in the other end of the horizontal plate body, and the second inserting cylinder is fixedly arranged at the other end of the horizontal plate body; the carriage comprises a flat-plate-shaped frame and a blocking rod, the middles and the two ends of the two sides of the frame are fixedly connected with first inserting barrels, the sleeving barrels in the widening component are sleeved with the first inserting barrels in a matched mode, and the horizontal plate body is pressed on the upper end faces of the first inserting barrels; the inner end of the supporting plate abuts against the outer side face of the first inserting-connecting cylinder, a blocking rod is inserted into the first inserting-connecting cylinder or the second inserting-con