auger refusal standard Geotechnical engineering general ...
Dec 20, 2007· Panars good point on the clarification of rig (exploratory vs drilled shaft)!! Also, a lot depends on the type of rock. You might get shale bedrock that an auger even an exploratory one (CME 55 or CME75) can penetrate 3 to 5 m or even more it is rock no question but . . . this might be far below your "rock level".