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 method (SCD).
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 [12].
Prabakar and Sridhar [9] 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 [17].
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 data.
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.