Immersed pipe cast-in-place pile refers to the pile formed by using the hammer piling method or vibration piling method, sinking the steel casing with a flap pile tip or prefabricated reinforced concrete pile shoe into the soil, and then hammering or vibrating while pulling the pipe while pouring concrete (or putting a steel cage in the pipe first).
The construction process of immersed pipe cast-in-place pile piling: the pile driver is in place→ hammering (vibrating) the immersed pipe→ the feeding → is hammered (vibrating) while pulling the pipe, and the concrete is continued to be poured → the reinforcement cage, and the concrete is poured and the pipe is → into piles.
The control depth requirements of the cast-in-place pile during the hammer immersed pipe method are as follows:
(1) Friction pile: The control of the depth of pile pipe into the soil should be mainly based on elevation, supplemented by penetration control.
(2) End-bearing pile: The depth control of the pile pipe into the soil should be mainly based on the degree of penetration, supplemented by elevation control. 、