Impact of extreme wildfires on the geotechnical properties of volcanic soils: A specific dataset from Central-Southern Chile

The volcanic soil samples analyzed in this study were collected during comprehensive field investigations. Sampling sites were precisely determined by delineating the perimeters of the 2023 extreme wildfire in Chile using high-resolution Sentinel-2 satellite imagery. Soil pits were excavated at eight locations, with depths reaching up to 1.5 m. In-situ tests conducted included Dynamic Cone Penetrometer (DCP), density measurements, and hydraulic conductivity assessments. Laboratory tests on soil samples included particle size distribution, modified Proctor compaction, California Bearing Ratio (CBR), unconfined compression tests, pH measurement, and loss on ignition. These test were conducted following precise sample preparation and protocols aligned with international standards, using exclusively standardized equipment.