Product introduction
GM-20A engineering drilling rig is a large-diameter light engineering drilling rig with tower crane integrated on the basis of GM-20 drilling rig improved by our company.
The machine integrates the characteristics of three types of drilling rigs: rotary table, power head and spindle type. It has high drilling efficiency, large drilling rig torque, high drilling accuracy, small over-diameter coefficient, wide rotational speed range, hydraulic pressure and pressure drilling, and oil cylinder up and down. The tower is fast and safe; the orifice is open after moving the car, and the drill bit with a diameter of 2.0 meters can be directly moved up and down; the steel cage can be directly lowered; the auxiliary winch has strong lifting ability and centralized control; The forward and reverse circulation drilling technology can be used to drill in the Quaternary gravel-bearing formation and hard formation. It is suitable for drilling large-diameter foundation pile holes such as bridges, highways, and high-rise buildings.