On How to Look Inside Geo-Materials
The observation of structural changes inside geo-materials during testing is still uncommon in geotechnical engineering. New developments in imaging techniques and improved analysis methods allow us for the first time to observe structural changes inside geo-materials and to provide us with the required information for developing new knowledge and constitutive relationships. The presented paper introduces three approaches for observing structural changes in porous media: (1) Particle Imaging Velocimetry (PIV) in combination with transparent hydro-gel beads, (2) Spatial Time Domain Reflectometry (Spatial TDR) for observing porosity distributions during contact erosion testing, and (3) Ultra High Speed Camera (UHSC) imaging in combination with a brittle, low strength rock like material for investigating hydraulic fracturing.
KeywordsImaging methods Transparent soil Electromagnetic methods
The presented research was funded by the Australian Research Council through the projects “Hydraulic erosion of granular structures” (DP120102188) and “Qualitative and quantitative modelling of hydraulic fracturing of brittle materials” (DP140100490) and supported by a Queensland Smart Futures Fellowship awarded to the first author.
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