Application of geophysical techniques to identify the causes of roadway instability in conductive ground (Fez region, Morocco) | ||
| International Journal of Mining and Geo-Engineering | ||
| مقاله 6، دوره 60، شماره 3، پاییز 2026، صفحه 303-312 اصل مقاله (1.42 M) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22059/ijmge.2026.403723.595328 | ||
| نویسندگان | ||
| Brahim Salhi1؛ Ahmed Benamara1؛ Lhoussaine Tarik2؛ Khalid Krami1؛ Ahmed Hamidi1؛ Mohammed Radouani1 | ||
| 1Department of Mechanical and Structural Engineering, National Graduate School of Arts and Crafts, Moulay Ismail University, Meknès, Morocco. | ||
| 2Department of Geosciences, Faculty of Sciences and Techniques, Moulay Ismail University, Boutalamine, Morocco. | ||
| چکیده | ||
| Road instability in marly formations poses a major threat to infrastructure, as water saturation reduces soil-bearing capacity and promotes landslides and subsidence. To address this issue, this study applies an integrated geophysical approach combining electrical resistivity tomography (ERT) and the very low frequency electromagnetic (VLF-EM) method to identify the subsurface causes of pavement failures on three unstable road sections in the Fez-Meknes region (Morocco). Six ERT profiles were acquired along with VLF-EM surveys and subsequently validated by core drilling. The results reveal pronounced conductive anomalies extending to depths of approximately 15–20. These critical anomalies are characterized by very low resistivity values (ρ ≈ 1–5 Ω·m) and interpreted as water-saturated clayey–marly horizons. Moreover, VLF surveys delineate linear conductive zones, while ERT imaging highlights resistivity contrasts and their spatial distribution. Importantly, core drilling confirms that the most conductive zones (< 5 Ω·m) correspond to plastic clayey marls. Thus, this combined ERT–VLF approach enables the identification of vulnerable areas and supports the design of appropriate drainage and stabilization solutions. | ||
| کلیدواژهها | ||
| Electrical resistivity tomography؛ VLF-EM؛ Road instability؛ Landslides؛ Marly formations؛ Pavement creep؛ Drainage | ||
| مراجع | ||
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