Collapsible soils are characterized by a loose metastable texture causing their collapse to a stable denser state upon wetting. In this paper measurements of collapse strains of two Campanian (Southern Italy) pyroclastic soils by the single oedometer test technique (ASTM D 5333) are presented. The time evolution of strain is analyzed, recognising a capillary rise phase followed by creep. It is shown that both phases can be represented by a power law, the end of capillary rise (EOCR) time separating the two phases being calculated. Pre-inundation and collapse strains are finally expressed in terms of a void index (Burland 1990), using saturation as the reference state.
Inundation collapse strain and creep measurements for two Campanian pyroclastic soils / DE SIMONE, Pasquale. - STAMPA. - 1:(2011), pp. 229-234. (Intervento presentato al convegno Fifth International Conference Unsatured Soils tenutosi a Barcellona (Spagna) nel 6-8 Settembre 2010).
Inundation collapse strain and creep measurements for two Campanian pyroclastic soils
DE SIMONE, PASQUALE
2011
Abstract
Collapsible soils are characterized by a loose metastable texture causing their collapse to a stable denser state upon wetting. In this paper measurements of collapse strains of two Campanian (Southern Italy) pyroclastic soils by the single oedometer test technique (ASTM D 5333) are presented. The time evolution of strain is analyzed, recognising a capillary rise phase followed by creep. It is shown that both phases can be represented by a power law, the end of capillary rise (EOCR) time separating the two phases being calculated. Pre-inundation and collapse strains are finally expressed in terms of a void index (Burland 1990), using saturation as the reference state.File | Dimensione | Formato | |
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