The sample from 8.4-8.6 m was analysed by the direct shear and oedometer tests, the sample from 9.3-10.1 m by the saturated consolidated drained triaxial test
At the same time, many scholars believed that the physical and mechanical properties of sandy pebble soil of different coarse-grained content such as cohesion, internal friction angle and permeability had a great impact (Wei et al., 2008; Yasin et al., 2017).Most of them conducted studies on macromechanical properties of sandy pebble soil using the triaxial test
and direct shear test but lacking micromechanical parameters of the composite structure of sand and pebble particles.
The triaxial test
requires installation of expensive equipment and loading methods .
Prabakar and Sridhar  used sisal fiber to reinforce silty clay; the effects of fiber content, length, and other factors on the strength parameters and compaction characteristics were investigated by triaxial test
and compaction test, and the results showed that sisal fiber can effectively increase the maximum deviatoric stress of clay.
The turning point between compression and dilatation, [eta], is ascertained by the stress point in triaxial test
where volumetric strain rate [[??].sub.v] is equal to 0 .
The values of parameters in DEPM for triaxial test
simulation are shown in Table 1.
Further mechanical considerations include one-dimensional compression and consolidation, the triaxial test
and anisotropic shear susceptibility, and soil settlement and elasticity.
Wang et al., "Study of scale effect of large-scale triaxial test
of coarse-grained meterials," Rock and Soil Mechanics, vol.
where: MR is resilient modulus; [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII]; p is atmospheric pressure; and [K.sub.1], [K.sub.2], and [K.sub.3] are material coefficients from multiple regression analyses of the repeated load triaxial test
A triaxial test
is recognized to be the most widely used method for the determination of the strength properties and the stress-strain state of soil.
Then, based on conventional triaxial test
data, the model parameters for dam materials of the Nuozhadu high earth-rockfill dam in Southwest China are determined.