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Slope stability under rapid drawdown conditions
dc.contributor.author | Alonso Pérez de Agreda, Eduardo |
dc.contributor.author | Pinyol Puigmartí, Núria Mercè |
dc.contributor.other | Universitat Politècnica de Catalunya. Departament d'Enginyeria del Terreny, Cartogràfica i Geofísica |
dc.date.accessioned | 2011-01-25T13:08:04Z |
dc.date.available | 2011-01-25T13:08:04Z |
dc.date.created | 2009 |
dc.date.issued | 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.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.format.extent | 17 p. |
dc.language.iso | eng |
dc.subject | Àrees temàtiques de la UPC::Enginyeria civil::Geologia::Riscos geològics |
dc.subject.lcsh | Landslide hazard analysis |
dc.title | Slope stability under rapid drawdown conditions |
dc.type | Conference report |
dc.subject.lemac | Esllavissades -- Models matemàtics |
dc.contributor.group | Universitat Politècnica de Catalunya. MSR - Mecànica del Sòls i de les Roques |
dc.description.peerreviewed | Peer Reviewed |
dc.rights.access | Open Access |
local.identifier.drac | 4476628 |
dc.description.version | Postprint (author’s final draft) |
local.citation.author | Alonso, E.; Pinyol, N.M. |
local.citation.contributor | Italian Workshop on Landslides |
local.citation.pubplace | Napols |
local.citation.publicationName | First Italian Workshop on Landslides |
local.citation.startingPage | 11 |
local.citation.endingPage | 27 |