Environmental Engineering Reference
In-Depth Information
Figure 6.10.
Relevance of laboratory shear tests to shear strength in the field (Kulhawy, 1992, repro-
duced with permission of ASCE).
Figure 6.11.
Mean normalised undrained strength ratio for major laboratory tests (Kulhawy, 1992, repro-
duced with permission of ASCE).
6.1.4.1
Triaxial test
Triaxial tests are the most common means of obtaining the peak shear strength parameters
c
and, provided constant volume conditions are reached within the strain capability of
the test, the fully softened strength. The triaxial test cannot be used to obtain residual
strengths because it is not possible to subject the soil to sufficient displacement on the shear
surface to reach these values.
,
