For different geological conditions, how to choose rotary drilling, rotary drilling, impact drilling?
Rotary excavation is often used in the excavation of cohesive and sandy soil layers, but the efficiency is relatively high. But for rock foundation excavation, the requirements for rotary excavation equipment, especially the requirements of drilling bit and drilling rig, are very large.
Such a soil condition, it is not recommended to use rotary drilling rig. The upper soil can be drilled with a rotary drill, and an impact drill can be used after the formation of rock.
