How do you calculate slope stability?

Stability is determined by the balance of shear stress and shear strength. If the forces available to resist movement are greater than the forces driving movement, the slope is considered stable. A factor of safety is calculated by dividing the forces resisting movement by the forces driving movement.

How do you calculate stability number?

Stability number method It is the method used to evaluate slope stability for homogeneous soils having cohesion. It is based on the principle resistance of soil mass against sliding, because of cohesion and internal friction acting over the failure plane. This failure surface is assumed to be a circular arc.

How do you measure soil stability?

Stability was measured by exposing soil aggregates to rainfall simulation (RS), wet sieving (WS), ultrasonic vibration (UV) and clay dispersion (CD). Analysis was conducted on 2.00–4.75 mm aggregates that were either (i) air-dry (DRY) or (ii) re-moistened to field capacity at −10 kPa (MOIST).

What are the factors affecting slope stability?

Slope stability is ultimately determined by two factors: the angle of the slope and the strength of the materials on it. In Figure 15.2 a block of rock situated on a rock slope is being pulled toward Earth’s centre (vertically down) by gravity.

What is factor of safety slope stability?

A value of factor of safety greater than 1.0 indicates that capacity exceeds demand and that the slope will be stable with respect to sliding along the assumed particul ar slip surface analyzed. A value of factor of safety less than 1.0 indicates that the slope will be unstable.

What is slope stability in geology?

Slope stability. Slope stability refers to the condition of inclined soil or rock slopes to withstand or undergo movement. The stability condition of slopes is a subject of study and research in soil mechanics, geotechnical engineering and engineering geology.

What is slope stability safety factor?

The stability of a slope is essentially controlled by the ratio between the available shear strength and the acting shear stress, which can be expressed in terms of a safety factor if these quantities are integrated over a potential (or actual) sliding surface. A slope can be globally stable if the safety factor,…

What is slope analysis?

Slope analysis is the most basic crucial information in site analysis to determine the appropriate location for site development. Slope analysis of 20.8 acre site. Diagram shows the use of graduated scale for mapping slopes from a contour map.