Tension and compression combined slow-bonding post-tensioning uplift pile and construction process thereof

The invention relates to the field of underground foundations, in particular to a pulling and pressing combined slow-bonding post-tensioning uplift pile and a construction technology thereof. The composite steel bars and the anchoring steel bars are arranged in the pile body up and down, and the top ends of the composite steel bars penetrate out of the top of the pile body; the connector is used for connecting the composite steel bars and the anchoring steel bars; the composite reinforcing steel bar comprises a twisted steel bar for prestressed concrete, and a slow-bonding layer and a protective pipe layer are sequentially arranged on the outer surface of the twisted steel bar in a stacked mode. According to the uplift pile, the threaded steel bars can be effectively protected, the threaded steel bars have larger corrosion allowance compared with steel strands, the durability and the anti-floating effect of the uplift pile can be ensured, the formed composite reinforcement cage is not prone to bending or tors