Excavation of tunnel in rock mass refers to complex continuum-discontinuous processes. For capturing the damages side walls and supports bolts/cables, different types elements shall be used same framework. In this work, a novel method is proposed which couples block, particle, bar for simulating intact mass, broken supporting system respectively during excavation. Brittle Mohr-Coulomb fracture ...

Two centrifuge tests on a quay wall and cantilevered retaining with saturated granular backfills were simulated using Finn-Byrne model. Capabilities of model in liquefaction analysis the evaluated. The subjected to horizontal acceleration time history vertical history. constitutive is linear elastic – perfectly plastic Hooke’s elasticity Mohr-coulomb criterion for yield surface assumed backfill...

Abstract Study of mechanical properties rock under hydro-mechanical coupling. The MTS815 mechanics system is used to perform triaxial compression tests water-saturated sandstones different confining pressures and pore water pressures. results show that the peak deviation stress its corresponding axial strain, residual stress, initial dilation deformation modulus sandstone are related pressure p...

In spite of many attempts to model dense granular flow, there is still no general theory capable of describing different types of flows, such as gravity-driven drainage in silos and wall-driven shear flows in Couette cells. Here, we summarize our recent proposal of the Stochastic Flow Rule (SFR), which is able to describe these cases in good agreement with experiments, and we focus on testing t...

We employed a Mohr-Coulomb safety factor equation to assess the response of ice-cemented slopes in the stable upland zone of the McMurdo Dry Valleys (MDV) to artificial increases in mean summertime soil surface temperatures (MSSST). Results show that ice-rich, silty tills on slopes 20° could fail by planar sliding with an increase in MSSST of ~5o to 9oC. This change corresponds to an atmospheri...

In his Comment on our paper [Phys. Rev. E 92, 022201 (2015)10.1103/PhysRevE.92.022201], Chareyre criticizes, as inaccurate, the simple approach we adopted to explain the strong enhancement of the quasistatic shear strength of the material caused by capillary cohesion. He also observes that a similar form of the "effective stress" approach, accounting for the capillary shear stress, which we neg...

In his recent biography of Terzaghi, Goodman (1999, p 213) has described Terzaghi and Peck's difficulties in writing 'Soil Mechanics in Engineering Practice' which, published in (1948), quickly established itself as a main pillar of geotechnical education. He quotes a judgement they formed on Donald Taylor’s (1948) book ‘Fundamentals of Soil Mechanics’ as a ‘theoretical and esoteric portrayal o...

The joint surface is widely distributed in the rock, thus leading to the nonlinear characteristics of rock mass strength and limiting the effectiveness of the linear model in reflecting characteristics. The JRC/JCS model is the nonlinear failure criterion and generally believed to describe the characteristics of joints better than other models. In order to develop the numerical program for JRC/...

In remote northern regions, lacking deep geothermal exploratory boreholes, a theoretical approach to provide first-order estimate of the stress regime seems useful tool. Literature data was used in this context evaluate orientation components and empirical relationships were applied calculate their magnitude community Nunavik, Quebec. A Monte Carlo-based sensitivity analysis carried out due unc...

Contacts at the Coulomb threshold are unstable to tangential perturbations and thus contribute to failure at the microscopic level. How is such a local property related to global failure, beyond the effective picture given by a Mohr–Coulomb type failure criterion? Here, we use a simulated bed of frictional disks slowly tilted under the action of gravity to investigate the link between the avala...