Pile foundation construction drilling equipment suitable for karst area

The utility model belongs to probing construction equipment field, concretely relates to pile foundation construction drilling equipment suitable for karst area. The utility model discloses a pile foundation construction drilling equipment suitable for karst area, includes rig, drilling rod, stake drill, ream bit, main sleeve pipe and interior sleeve pipe, diameter of ream bit compares is main cover external diameter of pipe big by 1 3mm, main sleeve pipe is used for following ream bit and passes through the rock stratum, until the complete department of bottom rock of solution cavity bottom, interior sleeve pipe is put into main cover inside pipe wall for concreting becomes the stake, main casing recovery reuse. The utility model provides a pile foundation construction drilling equipment suitable for karst area can once drill and pass through the multilayer karst, has both saved the cost, improves the work efficiency again, simple process, and the constructor of being convenient for masters. 本实用新型属于钻探施工设备领域，