Stiffness and strength governing the static liquefaction of tailings

• Type: Article in International Scientific Journal
• Date: 2013

Authors

F. Schnaid (Author) Other; J. Bedin (Author) Other; A. J. P. Viana da Fonseca (Author) FEUP; L. de Moura Costa Filho (Author) Other

Journal

Title: Journal of geotechnical and geoenvironmental engineering

Vol. 139 No. 12

Pages: 2136-2144

ISSN: 1090-0241

Publisher: ASCE-AMER SOC CIVIL ENGINEERS

Indexing

ISI Web of Knowledge - 13 Citations

ISI Web of Science

Scopus - 21 Citations

Scientific classification

CORDIS: Technological sciences > Engineering > Civil engineering > Geotechnics

Other information

Authenticus ID: P-008-H4Q

DOI: 10.1061/(ASCE)GT.1943-5606.0000924

Abstract (EN): In this study, the behavior of gold tailings is evaluated by a series of drained and undrained triaxial tests carried out in compression and extension and sheared under monotonic loading, allowing the critical state line (CSL) to be established. The observed highly nonlinear shape of the CSL under undrained loading was used to investigate the mechanics of tailings that were dictated by state transitions captured by both the state parameter and the measured values of shear-wave velocities. The definition of a zone is where state conditions may develop strain hardening (stable zone) or strain softening with high compressibility while maintaining the effective stress condition or, at the limit, a strong compressibility condition that may lead to collapse with loss of effective confinement and liquefaction. A set of original test data provides new evidence on how the small-strain shear modulus and shear strength can be coupled in the critical state framework to estimate the state parameter. This coupling is regarded as a key ingredient in characterizing the state of tailings because both the state parameter and the shear stiffness are proxies for flow liquefaction. © 2013 American Society of Civil Engineers.

Language: English

Type (Professor's evaluation): Scientific