Downhill progressive landslides in long natural slopes: triggering agents and landslide phases modeled with a finite difference method

Bernander, StigLuleå tekniska universitet,Byggkonstruktion och -produktion,Luleå tekniska universitet (LTU),Luleå University of Technology (LTU) (author)

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

TEKNIK OCH TEKNOLOGIER Samhällsbyggnadsteknik Geoteknik hsv//swe
ENGINEERING AND TECHNOLOGY Civil Engineering Geotechnical Engineering hsv//eng
TEKNIK OCH TEKNOLOGIER Samhällsbyggnadsteknik Infrastrukturteknik hsv//swe
ENGINEERING AND TECHNOLOGY Civil Engineering Infrastructure Engineering hsv//eng
TEKNIK OCH TEKNOLOGIER Maskinteknik hsv//swe
ENGINEERING AND TECHNOLOGY Mechanical Engineering hsv//eng
NATURVETENSKAP Fysik Annan fysik hsv//swe
NATURAL SCIENCES Physical Sciences Other Physics Topics hsv//eng
NATURVETENSKAP Geovetenskap och miljövetenskap Geofysik hsv//swe
NATURAL SCIENCES Earth and Related Environmental Sciences Geophysics hsv//eng
landslides in long natural slopes
progressive failure in different phases
triggering agents
effects of time and rate of loading
two main failure criteria
invalidity of one singular static load condition
massive spread over level ground
finite difference method of analysis
Progressiva skred
Defoemationsmjuknande material
Geoteknik
Soil Mechanics
Structural Engineering
Konstruktionsteknik
Attraktivt samhällsbyggande (FOI)
Attractive built environment (AERI)

Kullingsjö, Anders,1974Skanska Sweden, Johan på Gårdas gata 5, SE-405 18 Göteborg, Sweden; Chalmers University of Technology, GeoEngineering, SE-412 96 Göteborg, Sweden,Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)kullsjo (author)
Gylland, Anders S.Multiconsult, Sluppen 15, NO-7037 Trondheim, Norway; Norwegian University of Science and Technology, Geotechnical Engineering, NTNU, NO-7491 Trondheim, Norway,Norges teknisk-naturvitenskapelige universitet (NTNU),Norwegian University of Science and Technology (NTNU),Multiconsult ASA (author)
Bengtsson, Per-EvertSwedish Geotechnical Institute, Olaus Magnus väg 35, SE-581 93 Linköping, Sweden,Statens Geotekniska Institut (SGI),Swedish Geotechnical Institute (SGI) (author)
Knutsson, SvenLuleå tekniska universitet,Geoteknologi,Luleå tekniska universitet (LTU),Luleå University of Technology (LTU)(Swepub:ltu)svek (author)
Pusch, RolandLuleå tekniska universitet,Geoteknologi,Luleå tekniska universitet (LTU),Luleå University of Technology (LTU)(Swepub:ltu)rolpus (author)
Olofsson, JanSkanska Sweden, Johan på Gårdas gata 5, SE-405 18 Göteborg, Sweden (author)
Elfgren, LennartLuleå tekniska universitet,Byggkonstruktion och brand,Luleå tekniska universitet (LTU),Luleå University of Technology (LTU)(Swepub:ltu)elfgren (author)
Olofsson, Jessica,1975Skanska Sverige AB(Swepub:cth)jessicao (author)
Luleå tekniska universitetByggkonstruktion och -produktion (creator_code:org_t)

In:Canadian geotechnical journal (Print): Canadian Science Publishing53:10, s. 1565-15820008-36741208-6010

By the author/editor: Bernander, Stig; Kullingsjö, Ande ...; Gylland, Anders ...; Bengtsson, Per-E ...; Knutsson, Sven; Pusch, Roland; show more...; Olofsson, Jan; Elfgren, Lennart; Olofsson, Jessic ...; show less...

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Civil Engineerin ...; and Geotechnical Eng ...

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Civil Engineerin ...; and Infrastructure E ...

NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Other Physics To ...

NATURAL SCIENCES: NATURAL SCIENCES; and Earth and Relate ...; and Geophysics

By the university: Luleå University of Technology; Chalmers University of Technology

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