... interfaces using a hardening elasto-plastic model. calculations are performed by a computer program that, in each analysed (cylindrical) failure surface, compares acting and failure tangential forces, obtained from the results of the numerical model and strength characteristics of the materials...

... Characterization structural geology slope design depressurisation stability data collection metals & mining Upstream Oil & Gas information rock slope failure surface slope stability analysis rock mass strength rock mass blast damage slope failure drainage gallery ROCK SLOPES IN CIVIL...

... with the direction of sand deposition as compared to when the major principal stress is perpendicular to the direction of deposition. Upstream Oil & Gas cohesion failure surface rigorous lower bound solution friction angle variation Sloan plane anisotropic soil shear strength anisotropy...

... and are not included in this paper. Both the models use the modified Cam clay (MCC) yield surface to model the Roscoe state boundary on the wet side of critical state. The Naylor model (1978) adopts the Mohr-Coulomb failure criterion, whereas Houlsby et al. (1982) uses the Hvorslev failure surface to model the failure...

... resistance foundation soil bearing capacity excavation metals & mining vertical strengthening soil mass soft soil area deep excavation vertical strengthened body Thickness jth soil nail stability failure surface horizontal surface Soil Nail wire mesh shotcrete application...

... of many input variables. Modeling & Simulation variability slope failure Reservoir Characterization spatial variability model limit analysis failure probability cross-section geological modeling geologic modeling conditioning Upstream Oil & Gas slope stability analysis failure...

... Reservoir Characterization ground transportation coalcliff slip South Coast Railway investigation Claystone rail transportation Fluid Dynamics lawrence hargrave drive failure surface instability flow in porous media colluvium state rail authority coalcliff station landslide installation...

... Reservoir Characterization tension crack cohesion Wellbore Design proceedings international symposium Fioranello discontinuity Upstream Oil & Gas quarry strength parameter wellbore integrity pyroclastic deposit Rome failure surface sub-vertical cut dry slope geometry...

...Rock at Great Depth, Maury & Fourmaintraux (eds), © 1989Balkema, Rotterdam. ISBN 90 6191 9754 The pyramidal failure surface and failure locus of brittle rocks under the general triaxial stress states Critere de rupture pyramidale des roches fragiles dans les conditions de contrainte triaxiale Die...

... point of the stress-strain curve expressed in logarithms, and the failure stress as the stress level of the perfectly 100 5000 600 x Wit hout Tef ton o With Te-flon 400 Fig.4 The yield and failure surfaces for marble. plastic flow. The slope of the stress- strain curves does not depend on the ini- tial...

...- slides which had occurred in a thick se- quence of weak claystones. These recent landslides were studied in detail; clay sam- ples from failure surfaces were obtained and tested in the laboratory to determine index properties and peak and residual shear strengths (Hamel 1969, Hamel & Flint 1969, 1972...

...-wedge type as commonly observed but the failure surfaces could run through the floor materials, causing upthrusts at the toes of the spoil piles. Failure through the soft-rock Eloor was possible due to the slaking behaviour of the materials, resulting in a marked drop of shear strength when saturated...

... foundation calculation failure surface rock engineering Upstream Oil & Gas potential failure plane stability stress field stress analysis DAM FOUNDATION SLIDING STABILITY AND GROUND STRESSES ROBIN N. CHOWDHURY, Ph.D., Civ. Eng., F.G.S., MICE, London, M. EERI, MASCE !USA). ABSTRACT Procedures...

... cylindrical failure surface This tne: of ta.- ilure which USUally GO.curs in slopes that are bu11t ot soil, can also take place in rock mass where fissures, bedding sur- faces and craoks are randomly distributed and do not show any distinct direotions favourable to f ilure. (b) failure which results from...