000180281 001__ 180281
000180281 005__ 20181203022815.0
000180281 0247_ $$2doi$$a10.1139/t2012-061
000180281 022__ $$a0008-3674
000180281 02470 $$2ISI$$a000306814400009
000180281 037__ $$aARTICLE
000180281 041__ $$aeng
000180281 245__ $$aModelling the efficiency of a drainage gallery work for a large landslide with respect to hydrogeological heterogeneity
000180281 260__ $$bNational Research Council Canada$$c2012
000180281 269__ $$a2012
000180281 336__ $$aJournal Articles
000180281 520__ $$aThis study describes transient hydrogeological and geomechanical models realized jointly in 2006 by the Geolep office (Géologie de l’Ecole Polytechnique) of the Polytechnical School of Lausanne (EPFL) and GeoMod SA within the framework of the stabilization work of the La Frasse landslide (Vaud, Switzerland). These models evaluate the impact of a deep drainage gallery with subvertical drainage boreholes towards the surface in terms of reduction of the deformation velocities and increase of the landslide’s factor of safety. The paper presents the effect of different pipe spacing of the drainage system. Considering the local heterogeneities, the results show that a mean spacing between the drainage boreholes of the order of 10 m is sufficient to control the temporal head fluctuations between the wells within a range of a few metres. Moreover, this solution induces a strong diminution of the predicted displacements during a specific crisis, from 101 cm for the model without drainage to around 14 cm for the drained model, and a significant gain of stability (from a factor of safety (FoS) of 1.05 to 1.30).
000180281 6531_ $$alandslide, hydrogeological and geomechanical models, drainage gallery, geological heterogeneity, factor of safety
000180281 700__ $$0(EPFLAUTH)167501$$g167501$$aMatti, Boris
000180281 700__ $$0240837$$g106517$$aTacher, Laurent
000180281 700__ $$0241874$$g104806$$aCommend, Stéphane
000180281 773__ $$j49$$tCanadian Geotechnical Journal$$k8$$q968-985
000180281 909C0 $$xU10264$$0252080$$pLMS
000180281 909C0 $$xU10260$$0252122$$pGEOLEP
000180281 909CO $$particle$$pENAC$$ooai:infoscience.tind.io:180281
000180281 917Z8 $$x201460
000180281 937__ $$aEPFL-ARTICLE-180281
000180281 973__ $$rREVIEWED$$sPUBLISHED$$aOTHER
000180281 980__ $$aARTICLE