Centrifuge modeling of one-step outflow tests for unsaturated parameter estimations

H. Nakajima (1) , A. T. Stadler (1)

1 Geoscience Research

Centrifuge modeling of one-step outflow tests were carried out using a 2-m radius geotechnical centrifuge, and the cumulative outflow and transient pore pressure were measured during the tests at multiple gravity levels. Based on the scaling law of centrifuge modeling, the measurements generally showed reasonable agreement with prototype data calculated from forward simulations with input parameters determined from standard laboratory tests. The parameter optimizations were examined for three different combinations of input data sets using the test measurements. Within the gravity level examined in this study up to 40 g, the optimized unsaturated parameters compared well when accurate pore pressure measurements were included along with cumulative outflow as input data. The centrifuge modeling technique with its capability to implement variety of instrumentations under well controlled initial and boundary conditions, shortens testing time and can provide significant information for the parameter estimation procedure.

Domaines: Interfaces continentales, environnement; Océan, Atmosphère; Sciences de la Terre

H. Nakajima, A. T. Stadler. Centrifuge modeling of one-step outflow tests for unsaturated parameter estimations. Hydrology and Earth System Sciences Discussions, 2006, 3 (3), pp.731-768. ⟨hal-00298688⟩