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Strength and Deformation of Rockfill Material Based on Large-Scale Triaxial Compression Tests. I: Influences of Density and Pressure.

Authors :
Xiao, Yang
Liu, Hanlong
Chen, Yumin
Jiang, Jingshan
Source :
Journal of Geotechnical & Geoenvironmental Engineering. Dec2014, Vol. 140 Issue 12, p-1. 16p.
Publication Year :
2014

Abstract

A series of large-scale triaxial compression tests were conducted to investigate the strength and deformation behaviors of Tacheng rockfill material (TRM) in relation to the initial void ratio and initial confining pressure. The critical state friction angle of TRM was expressed as a linear function of the logarithm of the initial confining pressure. The excess peak state friction angle and excess characteristic state friction angle of TRM were formulated as linear equations of a revised relative dilatancy index to capture the influences of density and pressure on the peak state and characteristic state friction angles. The initial elastic modulus, tangent modulus, and secant modulus of TRM were dependent on the initial void ratio and initial confining pressure. In addition, a formulation incorporating density and pressure was proposed to simulate the initial elastic modulus of TRM. The volumetric and deviatoric strains of TRM at the critical state were also dependent on density and pressure. The critical state line of TRM in the space descended with a decrease in the initial void ratio. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
10900241
Volume :
140
Issue :
12
Database :
Academic Search Index
Journal :
Journal of Geotechnical & Geoenvironmental Engineering
Publication Type :
Academic Journal
Accession number :
99454979
Full Text :
https://doi.org/10.1061/(ASCE)GT.1943-5606.0001176