Rotary drilling rig is a kind of construction machinery suitable for hole-forming operation of building foundation engineering, mainly suitable for the construction of sandy soil, cohesive soil, silt and other soil layers. It is widely used in foundation construction such as cast-in-place pile, diaphragm wall and foundation reinforcement. Its height is about 20 meters, the maximum hole diameter can reach 1.5~4m, and the maximum hole depth is 60 ~ 90 m.
Rotary drilling rig can be used for piling, including highway pile foundation, railway bridge pile foundation, industrial and civil buildings, national grid foundation pile and so on.