A system capable of measuring both gravimetric and volumetric water content of unsaturated soils, at different soil depths, is presented. This system, based on the Time Domain Reflectometry (TDR), uses a new probe with helical electrodes assembled to a cylindrical core. The new probe was designed to work in conjunction with CPTU equipment. Tests performed in the field have demonstrated that the use of the proposed technique is perfectly feasible and could be of great usefulness in geotechnical applications.
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