SYMPOSIA PAPER Published: 01 January 1988
STP29088S

Triaxial Testing of Weak Rocks Including the Use of Triaxial Extension Tests

Source

The strength parameters of New Zealand Tertiary weak rocks are found to be intermediate between soil and rock. The nonlinear strength envelopes of these materials for the range of stresses encountered in engineering structures mean that the strength parameters cannot be adequately defined using standard triaxial compression tests.

The strength properties can be established at low stress levels by the triaxial extension test which allows tensile stresses to be developed in the neck of truncated specimens. At high stress levels a high stress triaxial cell is used with confining pressures up to 15 MPa.

Author Information

Millar, PJ
Ministry of Works and Development, Wellington, New Zealand
Murray, DR
Ministry of Works and Development, Wellington, New Zealand
Price: $25.00
Contact Sales
Related
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Details
Developed by Committee: D18
Pages: 376–386
DOI: 10.1520/STP29088S
ISBN-EB: 978-0-8031-5048-5
ISBN-13: 978-0-8031-0983-4