Cable percussion drilling

Cable percussion drilling (shell and auger) is the most common drilling method used for geotechnical site or ground investigations in the world. Depending upon access limitations and favourable ground conditions boreholes up to more than 60m depth can be formed.Standard light-cable percussion boring uses a two tonne capacity winch driven by a diese...

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Rotary drilling

Rotary drilling

Rotary drilling is used to form a deep observation borehole or for obtaining representative samples of rock which could not be recovered using traditional cable percussion or window sampling. The drilling method involves a powered rotary cutting head on the end of a shaft, which is driven into the ground as it rotates. The system requires lubricati...

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Cone penetration testing

Cone penetration testing

Cone penetration testing (CPT) involves driving a steel cone vertically into the ground using either a four or six wheeled drive truck or a semi-tracked or crawler mounted rig. The cone is pushed into the ground at  a constant rate of penetration of 20mm per second.During the penetration, measurements are recorded of the cone resistance, the side f...

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