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Keywords: safety factor
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Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-342
... proposed design method. The new design method considering both the drainage and reinforcing functions of the geocomposites. earth fill reinforcement drainage tanabashi non-woven fabric construction time embankment slope gradient safety factor interface stability analysis direct shear...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-513
... conditions, to a significant overestimation of safety factors for both 2-D and 3-D slopes. INTRODUCTION Limit equilibrium methods have been extensively used to evaluate the stability of slopes in engineering practice. In these methods, the factor of safety is commonly defined as a reduction factor...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-459
... parameters and then to estimate the safety factors by using slope design charts for circular failure surface or other calculation methods (Hoek and Bray, 1974). Reservoir Characterization Artificial Intelligence RMR classification system reservoir geomechanics Upstream Oil & Gas machine...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-426
... slide along irregular slip surfaces were employed. In the analysis, the traffic loading was approximated as a 0.61 m (2.0 ft) high surcharge fill having a unit weight of 19.7 kN/m3 (125 lb/ft3). The safety factors determined from the computer analyses are 1.2 for the existing slope with low groundwater...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-539
.... In the latter stage, a safety factor was searched by gradually reducing tuff strength until failure was eventually reached. A number of points on the roof were selected (Fig. 3) for which strains as a function of strength reduction were monitored. In particular, vertical strains were selected in points A, B, C...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-441
... and Table 2) shows that the shorter the slope height the smaller the safety factor and the thicker the wet zone the smaller the safety factor. The failure surface, as suggested in the hypothesis, is shallow and within the wet zone. Figure 2 : The typical results of stability analysis on the shallow sliding...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-409
... and non-damaged levees during past two earthquakes. Analyzed settlements agreed fairly well the actual settlements. INTRODUCTION Stability of river levees during earthquakes is usually evaluated by the safety factor of the slope. However, in the seismic design of the levees under very intense seismic...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-392
.... platform Offshore Platform Upstream Oil & Gas resistance safety factor diagram axial load relation programme reaction pile foundation design condition black sea continental platform Thickness Offshore Structure pile length lateral load romanian black sea load coefficient PILE...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-372
... elements. The numerical results are compared with those obtained by Bishop's simplified method. It is shown that the slope stability is significantly influenced by the soil-pile interaction. The safety factor of slopes reinforced with piles obtained by the shear strength reduction FEM is significantly...
Proceedings Papers

Paper presented at the ISRM International Symposium, September 10–12, 1990
Paper Number: ISRM-IS-1990-005
... geomechanics information identification knowledge management extensometer instrumentation program Upstream Oil & Gas shear zone contractor Reservoir Characterization Effectiveness powerhouse underground instrumentation safety factor excavation tunnel hardware abutment load instrumentation...
Proceedings Papers

Paper presented at the ISRM International Symposium, August 30–September 2, 1989
Paper Number: ISRM-IS-1989-080
..., as changes could influence the transport of ~aste components to the biosphere. The dominant mechanism of deformation of intact :ock is microcracking, at temperatures belo~ ISaaC. In time, the stress safety factor IS reduced because of microcracking. Stress safety factor is defined as the ratio...
Proceedings Papers

Paper presented at the ISRM International Symposium, September 21–24, 1981
Paper Number: ISRM-IS-1981-209
... conditions in heterogeneous media. FEM makes it possible to obtain the state of stresses in the slope by taking nonlinear properties into consid- eration. A potential slip line can be drawn by lining up directions of maximum shear stresses distributed in the slope. A mean safety factor along the determined...
Proceedings Papers

Paper presented at the ISRM International Symposium, September 21–24, 1981
Paper Number: ISRM-IS-1981-170
... 100m Fig. 12. An analyses. 80 60 40 20 example of point safety factor contour lines obtained from elastoplasticity o 6 CONCLUSIONS From a series of the study carried out on the tunnel stability giving eyes to the influence of the fallen pumice layer, the following conclusions can be drawn. (1...
Proceedings Papers

Paper presented at the ISRM International Symposium, September 21–24, 1981
Paper Number: ISRM-IS-1981-094
... Earthquake safety factor shear strength foundation situ shear test dynamic elastisity rockfill dam local safety factor laboratory test strength parameter shear test apparatus shear test Fig-1 Location map Dam Axis Crest Width lOm Top of Dan EL 7965m Height of Dam 102m Draw Down 30m lo Rock...
Proceedings Papers

Paper presented at the ISRM International Symposium, September 21–24, 1981
Paper Number: ISRM-IS-1981-171
...~nSile stresses arise, however, values of eSe stresses decrease by setting a span JI.Smaller. 4 ESTIMATION OF SAFETY FACTOR IN REINFORCED ZONES AROUND TUNNELS OR CAVITIES Relaxed zones are usually formed in course of excavation, and are reinforced with rock bolting or shotcrete, etc. Safety factors...
Proceedings Papers

Paper presented at the ISRM International Symposium, September 21–24, 1981
Paper Number: ISRM-IS-1981-177
... of calculated stresses, local safety factors and mean safety factors along faces of supposed three dimentional blocks are determined. These values of safety factors are referred to the estimation of the stability of founda- tion rock and of the effect of foundation treatment by replacing fractured zone with 270...
Proceedings Papers

Paper presented at the ISRM International Symposium, September 27–29, 1978
Paper Number: ISRM-IS-1978-046
... safety factor rock mass friction angle SLIDING STABILITY ANALYSIS OF AGUA VERMELHA INTAKE - POWERHOUSE STRUCTURE NELSON INFANTI JR" Geol., Geology Div., MILTON ASSIS KANJI, Prof., Dr., Vice-President, GH Eng. S.A., and Univ. Slio Paulo, Iformely at PROMON Eng. S.A.I, Brazil. F. KNEESE, Eng., Data...
Proceedings Papers

Paper presented at the ISRM International Symposium, September 27–29, 1978
Paper Number: ISRM-IS-1978-048
... slope Upstream Oil & Gas polygonal water pressure basic formula anchor force stability inclination interface equation equilibrium internal slip surface safety factor rock mass internal shear surface Reservoir Characterization formula plane slip surface external force shear...

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