Modeling Slope Instability as Shear Rupture Propagation in a Saturated Porous Medium

DSpace/Manakin Repository

Modeling Slope Instability as Shear Rupture Propagation in a Saturated Porous Medium

Citable link to this page

. . . . . .

Title: Modeling Slope Instability as Shear Rupture Propagation in a Saturated Porous Medium
Author: Viesca, Robert Christian; Rice, James R.

Note: Order does not necessarily reflect citation order of authors.

Citation: Viesca, Robert C. and James R. Rice. 2009. Modeling slope instability as shear rupture propagation in a saturated porous medium. In Proceedings of 4th International Symposium on Submarine Mass Movements and Their Consequences: November 8-11, 2009, Austin, Texas, ed. D. C. Mosher, R.C. Shipp, L. Moscardelli, J. D. Chaytor, C. D. P. Baxter, H. J. Lee, and R. Urgeles, 215-225. Advances in Natural and Technological Hazards Research 28. New York: Springer-Verlag.
Full Text & Related Files:
Abstract: When a region of intense shear in a slope is much thinner than other relevant geometric lengths, this shear failure may be approximated as localized slip, as in faulting, with strength determined by frictional properties of the sediment and effective stress normal to the failure surface. Peak and residual frictional strengths of submarine sediments indicate critical slope angles well above those of most submarine slopes—in contradiction to abundant failures. Because deformation of sediments is governed by effective stress, processes affecting pore pressures are a means of strength reduction. However, common methods of exami ning slope stability neglect dynamically variable pore pressure during failure. We examine elastic-plastic models of the capped Drucker-Prager type and derive approximate equations governing pore pressure about a slip surface when the adjacent material may deform plastically. In the process we identify an elastic-plastic hydraulic diffusivity with an evolving permeability and plastic storage term analogous to the elastic term of traditional poroelasticity. We also examine their application to a dynamically propagating subsurface rupture and find indications of downslope directivity.
Published Version: doi:10.1007/978-90-481-3071-9_18
Other Sources: http://esag.harvard.edu/rice/233_ViescaRi_SlopeStab_SubmarMassMov09.pdf
Terms of Use: This article is made available under the terms and conditions applicable to Open Access Policy Articles, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#OAP
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:5128476

Show full Dublin Core record

This item appears in the following Collection(s)

  • FAS Scholarly Articles [7588]
    Peer reviewed scholarly articles from the Faculty of Arts and Sciences of Harvard University
 
 

Search DASH


Advanced Search
 
 

Submitters