ABSTRACT

Hydraulic drive was provided using down-rated flow of 10 l/min from the tractor, adjustable via a valve on the hydraulic spool block at the rear of the tractor. Manipulation of this valve enabled penetration rates from approximately 0.2 mm/sec to 60 mm/sec to be attained. 12 volt electrical power obtained from a socket within the tractor cab provided power for the Golog logging equipment, laptop and the wire-draw depth encoding equipment. Cones used were GeoPoint 35.7 mm ‘scientific’ compression cones, modified to measure a maximum tip resistance of 20 MPa, and A. P. van den Berg’s standard “GOnsite!” software was used (A. P. van den Berg, 2002).