LABORATOIRES DE MÉCANIQUE DES ROCHES ET DES SOLS
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1 ÉCOLE POLY TECHNI QUE FÉDÉRALE DE LA USANNE Cotributio to the Moutai-Risks project of the Rock ad Soil Mechaics Laboratories of the Swiss Federal Istitute of Techoloy Lausae Dr. Vicet Labiouse Prof. Lyesse Laloui LMR -LMS LABORATOIRES DE MÉCANIQUE DES ROCHES ET DES SOLS
2 EPFL - Rock ad Soil Mechaics Laboratories Presetatio of the laboratories Mai activities LMR research : Rock falls ad Cliff istabilities LMS research : Hydro-mechaical modelli of ladslides Cotributios to the Moutai-Risks project Early-Stae Researcher ESR 8 Experieced Researcher ER 3 Network-wide traii activities 2
3 EPFL - Rock ad Soil Mechaics Laboratories About 35 people providi Research ad developmet 4 Mechaics of multiphase porous media 4 Geomechaics ad eery 4 Maaemet ad modelli of atural hazards 4 Mechaical behaviour of rocks ad rock masses 4 Desi ad techoloy i tuelli ad uderroud costructios Teachi ad traii 4 Soil ad Rock Mechaics 4 Geotechical ad tuelli eieeri 4 Natural Hazards Service ad cosultacy LMS 4 Soil ad rock testi accredited accordi to the ISO/CEI Stadard LMR 3
4 Rock falls ad Cliff istabilities Ru-out of frametal rock blocks (Iterre IIC, 2002) Experimetal study of block bouci (FNS, PhD 2004) Desi of protectio alleries (FNS, PhD thesis 1998) Hazard mappi of rock istabilities (Vaud, 2002) Ru-out of rock avalaches (Iterre IIIA, 2006, PhD) 4
5 Hydro-mechaical modelli of ladslides Advaced costitutive modelli of usaturated soils - Improved modelli of mechaical behaviour uder various saturatios - Sile mechaical effective stress Double-way H-M coupli Deree of saturatio S r Hydraulic part : Advaced SWCC descriptio Void ratio e Matric suctio s ACMEG-s : Advaced Costitutive Model for Evirometal Geomechaics 5
6 Hydro-mechaical modelli of ladslides Fiite elemets modelli of ladslides Advaced three-phase FE modelli Predictio of the time-depedet behaviour of the Trieseber ladslide (Liechtestei) Stabilisatio of La Frasse ladslide (Cato of Vaud) ruoff usaturated zoe (s=p a -p w ) roudwater level (p w =0) 1 0 de. of saturatio S w saturated zoe 1890 m 433 m kn/m 6
7 EPFL - Rock ad Soil Mechaics Laboratories Presetatio of the laboratories Mai activities LMR research : Rock falls ad Cliff istabilities LMS research : Hydro-mechaical modelli of ladslides Cotributios to the Moutai-Risks project Early-Stae Researcher ESR 8 Experieced Researcher ER 3 Network-wide traii activities 7
8 Backroud of the ESR 8 positio : CADANAV hazard mappi methodoloy elaborated at LMR Approach cosistet with the Swiss federal uidelies Rouh delieatio at reioal ad valley scales of the areas at risk to detect coflicts with lad use prelimiary maps Detailed hazard assessmet at local scale, accouti for the maitude ad mea retur period of evets hazard maps N 500 m Prelimiary map at reioal scale Prelimiary map at valley scale Hazard map at local scale 8
9 ESR 8 Poits to be tackled : Improved methodoloies for rockfall hazard ad risk mappi at reioal ad local scales to collect iformatio o preset methodoloies i Europe, with a particular emphasis o those that could be used with GIS; to work out procedures at reioal scale for a first rouh delieatio of the areas at risk, ad at local scale for a more detailed assessmet of rockfall hazard; to develop a methodoloy that takes ito accout the temporal probability ad volume of the evets as well as the spatial extet ad velocity of the rock falls; to evaluate the ifluece o lad-use plai ad risk of differet factors ad scearios, like the icrease i frequecy ad/or maitude of hazardous evets due to either atural (climate) or huma-iduced chaes Rem: The scope of ESR 7 (UPC) ad 8 positios should be well defied to avoid a too importat overlap of the researches 9
10 Framework of the ESR 8 positio Host istitutes ad supervisors Pricipal : LMR-EPFL (Labiouse) Secodmet : Euroeotècica (Amio) ad UJF (Jomas) Period : 6 36 moths Mai cotributio to the WB1: Hazard aalysis TA-01: Develop ad harmoise procedures for the idetificatio, locatio ad quatificatio of the processes creati moutai risk; TA-02: Improve the predictio of the spatial extet ad the velocity of extreme pheomea (ruout distaces ad impact velocities); TA-04: Develop techiques for assessi the temporal probability ad the maitude of the evets, determie ad map the hazard ad validate these outputs 10
11 Backroud of the ER 3 positio : Fiite elemets modelli of the behaviour of ladslides Natural slopes represet complex pheomea to model, both i space ad time Stro eed for umerical aalysis Multiphase coupled formulatio ad usaturated soil mechaics may siificatly improve the modelli Moder 3D FEM aalysis is cofirmed to be a useful tool for the desi ad selectio of risk mitiatio strateies 11
12 ER 3 Hydro-mechaical modelli for lare ladslides duri crises Cotributio, usi hydro-mechaical fiite elemets approach, to : the idetificatio of critical factors ivolved i the behaviour of lare ladslides processes (TA-03); the quatificatio ad mappi of the hazard (TA-04); the defiitio of criteria for establishi moitori etworks for early wari (TA-05); the developmet of alert thresholds (TA-13) Host istitutes ad supervisors First year i Lausae at LMS-EPFL (Laloui) Secod year i Barceloa at UPC (Coromias/Ledesma) Period : 0 24 moths 12
13 EPFL cotributio to the etwork-wide traii activities Topical workshop 2 Sile Hazard Aalysis (slide, rockfall, debris flow, sow avalaches) Oraisers : LMR-EPFL ad Quaterra (CH), Utrecht U ad ITC (NL) Locatio : Lausae or Sio 3 days i autum 2007 (November) Itesive Course Multi-scale hazard assessmet ad risk Oraisers : LMR-EPFL ad Quaterra (CH), Locatio : Cato of Wallis ad/or Vaud, Switzerlad 5 days i spri First aual meeti of the cosortium host i Lausae (Nov 2007) 13
14 ÉCOLE POLY TECHNI QUE FÉDÉRALE DE LA USANNE Cotributio to the Moutai-Risks project of the Rock ad Soil Mechaics Laboratories of the Swiss Federal Istitute of Techoloy Lausae Dr. Vicet Labiouse Prof. Lyesse Laloui LMR -LMS LABORATOIRES DE MÉCANIQUE DES ROCHES ET DES SOLS
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