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In-situ Geotechnical Testing

Lugeon Tests at Partial Saturation: Experimental and Empirical Contributions

B. R. Jones, J.L van Rooy and M.A Dippenaar. 2018. Rock mechanics and Rock Engineering

Implications of improved understanding of variably saturated flow are numerous, especially given the complexity, heterogeneity, and anisotropy of the intermediate fractured vadose zone. One such an implication is the quantification of water movement for engineering purposes, as flow-through unsaturated discontinuities cannot be quantified through commonly applied saturated approaches.

Hydraulic Conductivity Measurement

Lugeon test at Partial Saturation ​ To assess these non-linear results, the Forchheimer relationship was used to predict the flow rate at the imposed hydraulic heads. As the width of the fracture could not be used as input into the equation, due to the lack of saturation across its width, the width of the flow path was used instead.

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