dc.contributor |
Universitat Politècnica de Catalunya. Departament d'Enginyeria del Terreny, Cartogràfica i Geofísica |
dc.contributor |
Universitat Politècnica de Catalunya. MSR - Mecànica del Sòls i de les Roques |
dc.contributor.author |
Alonso Pérez de Agreda, Eduardo |
dc.contributor.author |
Pinyol Puigmartí, Núria Mercè |
dc.date |
2009 |
dc.identifier.citation |
Alonso, E.; Pinyol, N.M. Slope stability under rapid drawdown conditions. A: Italian Workshop on Landslides. "First Italian Workshop on Landslides". Napols: 2009, p. 11-27. |
dc.identifier.uri |
http://hdl.handle.net/2117/11200 |
dc.language.iso |
eng |
dc.rights |
info:eu-repo/semantics/openAccess |
dc.subject |
Àrees temàtiques de la UPC::Enginyeria civil::Geologia::Riscos geològics |
dc.subject |
Landslide hazard analysis |
dc.subject |
Esllavissades -- Models matemàtics |
dc.title |
Slope stability under rapid drawdown conditions |
dc.type |
info:eu-repo/semantics/submittedVersion |
dc.type |
info:eu-repo/semantics/conferenceObject |
dc.description.abstract |
The rapid drawdown condition arises when submerged slopes experience rapid reduction of the external water level. Classical analysis procedures are grouped in two classes: the “stress-based” undrained approach, recommended for impervious materials and the flow approach, which is specified for rigid pervious materials (typically a granular soil).
Field conditions often depart significantly from these simplified cases and involve materials of different permeability and compressibility arranged in a complex geometry. The drawdown problem is presented in the paper as a fully coupled flow-deformation problem for saturated/unsaturated conditions. Some fundamental concepts are first discussed in a qualitative manner and, later, explored in more detail through the analysis of two embankment dams. In Shira earthdam pore pressures were recorded at different points inside the embankment as a consequence of a controlled drawdown. Predictions of four calculation procedures (instantaneous
drawdown, pure flow, coupled flow-elastic and coupled flow-elastoplastic, all of them for saturated/unsaturated conditions) are compared with measured pressure records. Only the coupled analysis provides a consistent and reasonable solution. The case of a large landslide, immediate to a reservoir, reactivated by a condition of rapid drawdown is also described in the paper. |
dc.description.abstract |
Peer Reviewed |