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Downhill Progressive Landslides in Long Natural Slopes: Triggering Agents and Landslide Phases modeled with a Finite Difference Method
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Byggkonstruktion och -produktion.
Skanska Teknik, Göteborg, Chalmers University of Technology.
Multiconsult, Norwegian University of Science and Technology (NTNU), Trondheim.
Statens Geotekniska Institut, Linköping, PEB Geoteknik.
Vise andre og tillknytning
Rekke forfattare: 82016 (engelsk)Inngår i: Canadian geotechnical journal (Print), ISSN 0008-3674, E-ISSN 1208-6010, Vol. 53, nr 10, s. 1565-1582Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

A large landslide in Tuve (Gothenburg, Sweden 1977) initiated the development of a model for slope stability analysis taking the deformation-softening of soft sensitive clays into consideration. The model studies triggering agents and five phases in progressive slope failure are identified: (1) in-situ, (2) disturbance, (3) unstable ‘dynamic’, (4) transitory (or permanent) equilibrium, and (5) ‘global’ failure. The clay resistance in these phases may differ widely; mostly due to different rates of loading. Two time dependent failure criteria are defined: (i) the triggering load condition in the disturbance Phase (2), and (ii) the transitory equilibrium in Phase (4), indicating whether minor downhill displacements or a veritable landslide catastrophe will occur. The analysis explains why downhill landslides tend to spread over vast areas of almost horizontal ground further down-slope. The model has been applied to landslides in Scandinavia and Canada. Three case studies are briefly discussed. The model is a finite difference approach, where local downhill deformations caused by normal forces is maintained compatible with deviatory shear deformations above the potential (or the established) failure surface. Software and an easy-to-use spreadsheet are introduced as well as recent developments. See also Video Abstract.

sted, utgiver, år, opplag, sider
2016. Vol. 53, nr 10, s. 1565-1582
Emneord [en]
Civil engineering and architecture - Geoengineering and mining engineering
Emneord [sv]
Progressiva skred, Defoemationsmjuknande material, Samhällsbyggnadsteknik och arkitektur - Geoteknik och gruvteknik
HSV kategori
Forskningsprogram
Geoteknik; Konstruktionsteknik; Attraktivt samhällsbyggande (FOI)
Identifikatorer
URN: urn:nbn:se:ltu:diva-8899DOI: 10.1139/cgj-2015-0651ISI: 000385647600001Scopus ID: 2-s2.0-84989869469Lokal ID: 7728f175-24d8-44ef-9bc4-cedb0060ee63OAI: oai:DiVA.org:ltu-8899DiVA, id: diva2:981837
Merknad

Validerad; 2016; Nivå 2; 2016-11-02 (andbra)

Tilgjengelig fra: 2016-09-29 Laget: 2016-09-29 Sist oppdatert: 2018-07-10bibliografisk kontrollert

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Bernander, StigPusch, RolandKnutsson, SvenElfgren, Lennart

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