Numerical methods provide a new way for solving complex geotechnical engineering problems. Firstly, we review the emergence and development of numerical methods, introduce basic principles particle flow discrete element its application in engineering. After that, method servo combination cylinder loading plate is used, simulation three-dimensional rock triaxial unloading test carried out by PFC...

A series of tests were performed to investigate the creep characteristics of soil in interactive marine and terrestrial deposit of Pearl River Delta. The secondary consolidation test results show that the influence of consolidation pressure on coefficient of secondary consolidation is conditional, which is decided by the consolidation state. The ratio of coefficient of secondary consolidation a...

The rockfill structures are widely constructed throughout the world and rockfills are largely used in these structures as main materials or filler materials. In the crust of earth dams, the rockfill materials role is to stabilize the body of the dam, however, the behavior of these materials in Particular their shear strength is not fully understood. In this study, different tests have been cond...

The failure of rocks subjected to a general state of stress (σ1 ≥ σ2 ≥ σ3) has been studied since the pioneering true triaxial experiments conducted by Mogi [1]. In true triaxial tests, cuboidal specimens are subjected to fixed, and typically unequal, σ3 and σ2, while σ1 is increased until failure occurs (expressed by σ1 at failure, or σ1,peak). For each constant σ3, σ2 is varied from test to t...

Statistical analyses of transmission vibration patterns from an AH-1 Cobra helicopter were previously reported. Fourteen steady-state maneuvers were analyzed using multi-factor analysis of covariance. Based on triaxial recordings, it was found that only two maneuvers displayed reliably stationary time-series: low and high power forward climb. Principal Components Analysis of the triaxial RMS da...

The low load-bearing capacity of subgrade soils is typical for forest roads. For the determination resilient modulus Mr unbound natural as well recycled materials, a laboratory triaxial test with cyclic loading generally preferred. volume roads, including an alternative method CBR test, which uses standard devices repeated loading, being tested and applied in practice. soils, procedure determin...

The effect of gas drainage is often affected by water after hydraulic infiltration enhancement measures are adopted for soft and weak permeability coal. In order to understand the characteristics coal in state water, a three-phase pipe domain model established. Using improved triaxial seepage test platform, three groups cyclic tests under different pressure injection conditions carried out on r...