Drained shear strength of stiff clays for slope stability analyses

An investigation has been conducted to gain a better understanding of the drained residual and fully softened shear strengths of cohesive soils, the shear strength mobilized in field case histories involving previous and no previous sliding in stiff clays, and develop empirical relationships that describe the stress-dependent nature of the residual and fully softened shear strengths in terms of soil index properties. To investigate the drained residual strength, a Bromhead ring shear apparatus was modified to allow testing of overconsolidated, presheared, remolded soil specimens of different plasticity and clay-size fraction. Residual shear strengths measured using the modified ring shear apparatus were compared to shear strengths measured in conventional reversal direct shear tests on precut remolded specimens and shear strength values back-calculated from well documented field case histories of slopes that underwent previous sliding. The modified ring shear, direct shear, and triaxial compression apparatuses were used to investigate the fully softened shear strength using normally consolidated, remolded specimens. The natural soils used in the residual and fully softened research have a range of liquid limit of 24 to 286%, plasticity index of 8 to 244%, and clay-size fraction of 10 to 88%.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Civil Engineering

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2011

Author dc:creator

• Eid, Hisham Tawfik

Contributors dc:contributor

• Stark, Timothy D.

• Applied Mechanics
• Geotechnology
• Engineering, Civil

Statement dc:rights

• Copyright 1996 Eid, Hisham Tawfik

Language dc:language

eng

Identifier

9780591087345
AAI9702507
(UMI)AAI9702507

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/20897