Inclinable Shear Box Simulations of Deepening Active Layers on Perennially Frozen Scree Slopes | Zendy

Rist A. | Zendy; Phillips M. | Zendy; Springman S. M. | Zendy

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Inclinable Shear Box Simulations of Deepening Active Layers on Perennially Frozen Scree Slopes

Author(s) -

Rist A.,

Phillips M.,

Springman S. M.

Publication year - 2012

Publication title -

permafrost and periglacial processes

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.867

H-Index - 76

eISSN - 1099-1530

pISSN - 1045-6740

DOI - 10.1002/ppp.1730

Subject(s) - permafrost , active layer , geology , geomorphology , terrain , geotechnical engineering , shear (geology) , slope stability , stratigraphy , layer (electronics) , petrology , seismology , oceanography , materials science , ecology , tectonics , composite material , biology , thin film transistor

A series of systematic shear tests were performed using an inclinable shear box containing a coarse‐grained active layer overlying a fine‐grained permafrost layer, a stratigraphy observed in the field. The angle of mobilised interface friction Φ mob was determined as depending on the grain size of the active layer and the permafrost, the water content of the active layer and the ice content of the permafrost. Φ mob was found to be 8° lower for ice‐free permafrost compared to permafrost containing ice. This result implies a possible long‐term decrease of active‐layer slope stability on scree slopes in Alpine permafrost terrain under warming conditions. Copyright © 2012 John Wiley & Sons, Ltd.

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