Geological and geotechnical information from 159 borehole in-situ-and lab-based measured plasticity, unconfined compression, and consolidation parameters for alluvial clays have been analysed. For this analysis, 3D models was prepared using VOXLER 3 software package. The prime objective was to spatially model the geotechnical variability and to derive the loading factors along with recognition of the distinctive geotechnical patterns. Results have been presented for the alluvial soils of Tanta region, Egypt with the principal geotechnical hazards in the main eight districts were identified. Plasticity charts indicated that the soils are inorganic cohesive highly plastic clays. Geotechnical parameters showed wide ranges evidenced by their large standard deviations. Al-Mahata and Quhafa areas are characterized by high plasticity soils. Quahafa and beneath Al-Galaa street areas showed the largest unconfined compression strength. Largest over-consolidation ratio and compression index values were recorded in Al-Mahata and Al-Emary areas, respectively. High natural water content areas match well with those where water table is closer to the ground surface in Quhafa and Al-Emary areas. The results of the employed approach can help to establish geohazard zonation 3D maps with construction favorability for safe urban expansions.
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