Connecting joint with precast concrete pipe pile as swing column

The connecting joint comprises an upper-layer prefabricated concrete pipe pile column and a lower-layer concrete structure, a shear key is arranged in the lower-layer concrete structure, and the upper end of the shear key extends out of the upper end face of the lower-layer concrete structure. The lower end of the upper-layer prefabricated concrete pipe pile column is located on the upper end face of the lower-layer concrete structure, a pulling and connecting rib arranged along the full length of a pile body is arranged in a pile core hole of the upper-layer prefabricated concrete pipe pile column, and the lower end of the pulling and connecting rib is connected with a shear key. And the concrete in the pile core hole of the upper-layer precast concrete pipe pile column and the concrete of the lower-layer concrete structure are formed by one-time pouring. Prefabricated concrete pipe piles are used as swing columns to be assembled and connected with a lower-layer concrete structure to form connecting joints,