PEGGHy - Platform for Experimental Geophysics, Geotechnics and Hydrogeology of the Graduate School of Geological Engineering, Nancy, France

@inproceedings{sausse:hal-05215177,
 abstract = {Students in geo-engineering need to master the complex structuring, properties and behaviours of the underground. In addition to geological observations, pedagogical field works can involve the deployment of instruments for dedicated measurements to characterize and monitor a specific site. However, surveys are often carried out with a limited knowledge on the geometry of the underground structure, so discussing the accuracy and limitations of the prospection methods in a robust and quantitative way is tricky. To circumvent this major issue, we have developed the Platform for Experimental Geophysics, Geotechnics and Hydrogeology (PEGGHy), which holds "artificial", fully controlled geological structures and heterogeneities. PEGGHy is filled with aggregates which have been selected based on i) their lithological properties so that significant geophysical contrasts are expected, and ii) their porosity and permeability to provide heterogeneous fluid flows. In addition, the base of the pit and the top of some folded layers are sealed by geomembranes to create both a confined reservoir and a free aquifer. Thanks to photogrammetric data acquired by drone, PEGGHy goes with a 3D, centimetric precision digital twin. Such a numerical tool allows to quantitatively compare models derived from geophysical, geotechnical and/or hydrogeological data with the true subsurface geometry. It also allows to run various modelling codes and confront their results to real data, providing a unique opportunity to teach and test numerical schemes, discretization algorithms and auscultation methods.},
 address = {Nancy, France},
 author = {Sausse, Judith and Cupillard, Paul and Abdallah, Adel},
 booktitle = {{6th International Conference on Geotechnical Engineering Education Proceedings}},
 hal_id = {hal-05215177},
 hal_version = {v1},
 keywords = {Digital twin ; Hydrogeology ; Geotechnical engineering ; Applied geophysics ; Experimental Platform},
 month = {July},
 organization = {{TC306 - ISSMGE}},
 title = {{PEGGHy - Platform for Experimental Geophysics, Geotechnics and Hydrogeology of the Graduate School of Geological Engineering, Nancy, France}},
 url = {https://hal.science/hal-05215177},
 year = {2025}
}