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(Article of periodic en Anglais - 2014)

Document title

Feasibility of ice segregation location by acoustic emission detection : A laboratory test in gneiss

Authors(s) and Affiliation(s)

DUCA S. (1 2) ; OCCHIENA C. (2) ; MATTONE M. (3) ; SAMBUELLI L. (4) ; SCAVIA C. (2) ;
(1) eni spa, Upstream and technical Services LAIP, Milan, ITALIE
(2) Dept. of Structural Building and Geotechnical Engineering, Politecnico di Torino, Turin, ITALIE
(3) Dept. of Mechanical and Aerospace Engineering, Politecnico di Torino, Turin, ITALIE
(4) Dept. of Environment, Land and Infrastructure Engineering, Politecnico di Torino, Turin, ITALIE

Abstract

The AA. report results from a 3 month freezing experiment taht aimed to reproduce ice-lens growth at the interface between the active layer and permafrost in a 15 cm cube of hard, intact rock (Arolla gneiss). Monitoring of acoustic emissions (AEs) recorded the propagation of microcracks horizontally through the block, resulting in a continuous and thick macrocrack near the base of the artificial active layer. Microcracking occurred within a temperature range consistent with ice segregation theory. Hypocentres of recorded AE events were concentrated in a 40 mm thick band between depths of 4.5 and 8 cm in the block. The band approximately coincides with the frozen fringe and indicates that ice segregation can induce micro- and macrocracking in gneiss

Source

Article of periodic

published at : Permafrost and periglacial processes / ISSN 1045-6740 / CODEN PEPPED

Editor : Wiley, Chichester - ROYAUME-UNI (1990)

Millesime : 2014, vol. 25, no3 [pp. 208-219]

Bibliographic references : 1 p.

Collation : 14 fig., 3 tabl.

Language

Anglais

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/ppp.1814

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2014
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