Partially-prestressed reinforced concrete solid square pile upper segment and manufacturing method thereof

The invention provides a partially-prestressed reinforced concrete solid square pile upper segment and a manufacturing method thereof. The partially-prestressed reinforced concrete solid square pile upper segment and the manufacturing method thereof are used for solving the problems that in the prior art, in the process of pile cutting of an upper segment of a prefabricated pile, a pile body is damaged, or pile cutting is not convenient, so that the phenomenon that the pile body can not meet requirements for mechanical performance and pile sinking construction is caused. The upper segment of the square pile comprises concrete, a reinforcement cage, a pile cap and a fixed end plate, wherein the reinforcement cage is of a square combined type whole structure, the pile cap is arranged at one end of the reinforcement cage and fixedly connected with the reinforcement cage, and the fixed end plate is arranged at the other end of the reinforcement cage and is fixedly connected with the reinforcement cage. By the ado