ISSN: 1945-7545
CODEN: GTJODJ
Page Count: 8

Measurement of the Pore Pressure Parameter C Less Than Unity in Saturated Sands

Veyera, GE
Associate professor of civil engineering and geotechnical engineering program leader, University of Rhode Island, Kingston, RI

Charlie, WA
Professor of civil engineering and geotechnical engineering program leader, Colorado State University, Ft. Collins, CO

Doehring, DO
Professor and head of earth resources, Colorado State University, Ft. Collins, CO

Hubert, ME
Geotechnical engineer, Bureau of Hazardous Material and Solid Waste, DEP, Augusta, ME

Abstract

Two saturated sands, Monterey No. 0/30 and Enewetak coral, tested undrained under one-dimensional strain loading, were found to have values of the pore pressure parameter C, less than unity. The C parameter for Monterey No. 0/30 sand, determined to be unity at an effective consolidation stress of 86 kPa, decreased with increasing effective consolidation stress and increasing relative density. A similar behavior was observed for the Enewetak coral sand. These trends are similar to those reported by other researchers for the pore pressure parameter B. The decrease in C parameter values for saturated specimens appears to be a direct result of increasing skeleton stiffness due to increases in effective stress and density. A theoretical analysis of skeleton stiffness based on porosity and pore pressure response predicts similar trends.

Keywords:
compressibility, effective stress, pore pressure parameter C, laboratory tests, pore pressure, relative density, sands, saturation, stiffness

Paper ID: GTJ10017J
DOI: 10.1520/GTJ10017J
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