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LABORATORY TESTING
Undisturbed and bulk samples of soil and rock materials encountered at the site
were collected during the course of our field work. Selected laboratory tests completed
on the retrieved samples are described below:
Moisture-Density
The field moisture content and dry unit weight were determined for each
undisturbed sample. Dry unit weight is expressed in pounds per cubic foot and the
moisture content represents a percentage of the dry unit weight. This test data is
presented on the boring logs.
Shear Test
Shear tests were performed in a Direct Shear Machine of the strain control type
commensurate with ASTM D 3080. The rate of deformation is approximately 0.01
inches per minute. Selected samples, as noted in the shear test diagram, were sheared at
reduced rates of deformation. Shearing occurred under a variety of confining loads in
order to determine the Coulomb shear strength parameters. The test was performed on
undisturbed and remolded (@ 90% relative compaction) samples in an artificially
saturated condition.
Stress-strain curves are presented in the page following the shear test diagram. It
should be noted that for the case of undisturbed single-cycle shear tests the value at the
end of the stress-strain curve were selected (residual value per LACDPW Manual for
Preparation of Geotechnical Reports). The shear test diagrams have the descriptor of
“Ultimate” to distinguish such single-cycle tests from multi-cycle shear tests.
Consolidation Test
A-554
