Our Services

CPT

 

Cone penetration testing (CPTu), also known as Piezocone Penetration Testing, is an in-situ geotechnical method used to investigate soil types, stratigraphy, and engineering properties. It involves hydraulically pushing an electronic steel cone into the ground at a constant speed of 20 millimeters per second. The CPTu cone measures Cone Tip Resistance (qc), sleeve friction (fs) and pore water pressure (u), in real time. All CPT cones and acquisition system is calibrated properly and professionally by the manufacturer, Geomil. 

In-Situ Sampling

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The CPT rig pushes the sampler to depth, a wireline tool (cable) unlocks it and retracts the cone tip to the top of unit. The sampler barrel with sample tube advances while the tip stays fixed, allowing an undisturbed soil sample to enter the lined tube. The tube is then retrieved and sealed.

Soil Classification

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Logging of soils and gravels as per AS1726:2017. AS 1726:2017

Establishes the requirements for the execution of effective geotechnical site investigations and provides a standardized system for the description and classification of soils and rocks, which is largely normative. It addresses spatial and physical characteristics of soil, rock and groundwater.

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Lithological Identification

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Drill rig supervision and geological logging is undertaken by a qualified Senior Geologist or Engineering Geologist. Whether for civil engineering purposes or to update the mine model, Hunter Earth Data can provide all field activities for the ID, sampling (Geotechnical, geochemical, UCS, coal quality), geophysical correlation and interpretation. Lithological logging will be undertaken in either AS 1726 or coallog formats.   

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