In 2012, FIELAX adapted its well-established Heat Flow measuring system to a VKG6 type Vibrocorer in order to measure thermal gradient and conductivity measurements in shear resistant marine sediments. The combined system has been successfully operated on many cable route surveys for the connection of Offshore Windparks to the main land.
In cooperation with Marine Sampling Holland, FIELAX has further developed the system to work with a CPT unit used for in-situ geotechnical measurements, in order to overcome possible liquefaction, which may occur in very sandy sediments due to the vibrocoring. Therefore the sensorstring was adapted to fit into a standard coiled CPT-tube of 6 m length i.e. the number of temperature sensors was reduced to 13 temperature sensors at a spacing of 42 cm.
A first successful test of this new system was carried out together with Marine Sampling Holland (see also http://www.marinesamplingholland.nl) this September in a geotechnical survey in the North Sea.