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Slope stability analysis is a static or dynamic, analytical or empirical method to evaluate the stability of slopes of soil- and rock-fill dams, embankments, excavated slopes, and natural slopes in soil and rock.
Slope stability refers to the condition of inclined soil or rock slopes to withstand or undergo movement; the opposite condition is called slope instability or slope failure. The stability condition of slopes is a subject of study and research in soil mechanics , geotechnical engineering , and engineering geology .
The method is an extension of the Newmark's direct integration method originally proposed by Nathan M. Newmark in 1943. It was applied to the sliding block problem in a lecture delivered by him in 1965 in the British Geotechnical Association's 5th Rankine Lecture in London and published later in the Association's scientific journal Geotechnique. [1]
The developers of SVSLOPE have implemented all of the classic features traditionally found in slope stability software as well as an interesting list of new features. The following is a list of some of the more distinct features of SVSLOPE: Probabilistic analysis; One-way or two-way sensitivity analysis; Spatial variability using random fields
The field of slope stability encompasses the analysis of static and dynamic stability of slopes of earth and rock-fill dams, slopes of other types of embankments, excavated slopes, and natural slopes in soil and soft rock. [24] As seen to the right, earthen slopes can develop a cut-spherical weakness zone.
Rock slope design techniques have been derived using Q-slope and geophysical survey data, primarily based on V p (P-wave velocity). [9] Q-slope has been applied in conjunction with remote sensing (aerial photogrammetry) to assess slope stability in hazardous and 'out-of-reach' natural and excavated slopes. [10]
The operation of re-profiling a slope with the aim of improving its stability, can be achieved by either: Lowering the angle of the slope, or; Positioning infill at the foot of the slope; Slope angles can be reduced by digging out the brow of the slope, usually in a step-wise fashion.
Slope mass rating (SMR) is a rock mass classification scheme developed by Manuel Romana [1] [2] [3] to describe the strength of an individual rock outcrop or slope. The system is founded upon the more widely used RMR scheme, [4] which is modified with quantitative guidelines to the rate the influence of adverse joint orientations (e.g. joints dipping steeply out of the slope).