Hollow artificial hole digging bored concrete pile and its construction method

The invention relates to a perfusion concrete pile, especially a hollow artificial hole-digging perfusion pile and its construction method. It includes pile ring made of concrete is connected by many pile section, and the pile ring is hollow; main reinforcement made of reinforcing steel is embedded in the wall of the pile ring. Its construction method is as follows: pile bore is dug to the design diameter and height; the upper end of the main reinforcement is connected to the main reinforcement of the upper section pile ring, the bottom of the main reinforcement is inserted into the pre-moded hole of the bottom formwork; spiral stirrup is bounded at the outside of the main reinforcement; the raised internal template is laid concrete, pouring concrete is vibrated concrete vibrating, then remove shuttering after conserve. Then the next circle construction is done as the above. The advantage of the invention is that it can economize the concrete, sharply improve the bearing capacity of the pile, reduce the deadw