What are the key points of construction management of bored pile with rotary drilling rig?

Safety first, accurate pile position, length of pile casing, mud quality, hole-forming depth and diameter, position and elevation of reinforcing cage, concrete quality, continuous pouring of concrete, pipe burying and pouring elevation are mainly these.

Rotary drilling rig is a kind of construction machinery suitable for hole-forming operation in building foundation engineering. It is mainly suitable for the construction of sandy soil, cohesive soil, silt and other soil layers, and is widely used in the construction of various foundations such as cast-in-place piles, diaphragm walls and foundation reinforcement. Generally, the rated power of rotary drilling rig is 125~450kW, the power output torque is120 ~ 400kn m, and the maximum borehole diameter can reach 1.5 ~ 4 m.