Slope stability analysis SLOPE/W is the leading slope stability software for soil and rock slopes. Slope stability design should be consistent with state-of-the-practice design guidelines, including but not limited to the referenced publications in Section 7.7. Drains are used to reduce water … Alternatively, shear strength may be decreased by weathering, changes in pore water pressure, and organic material.
An Effects of Water on Slope Stability 6. Slope stability is influenced by many factors, among which are subsoil structure and pore water pressure distribution. Performing Organization Report No. Slope stability design shall be evaluated using conventional limit equilibrium methods, and analyses should be performed using a state-of-the-practice SLOPE/W can analyze stability at each construction stage, including the effects of pore-water pressure changes and interaction with reinforcement. Pore water pressures in Equation 2 are due to the free pore water existing between soil particles. GEO-SLOPE International Ltd, Calgary, Alberta, Canada www.geo-slope.com SEEP/W Example File: Seepage and stability.doc (pdf) (gsz) Page 1 of 6 SEEP/W generated pore-water pressures in SLOPE/W stability analysis 1 Introduction The objective of this illustration is to observe how to use finite element pore-water pressure results in a
The field of slope stability encompasses static and dynamic stability of slopes of earth and rock-fill dams, slopes of other types of embankments, excavated … The value of the calculated factor of safety depends on the judgments made in selecting the Factors Affecting Slope Stability in Open Excavation.
7. Appendix D discusses shear strength value selection. A slope previously stable may … Types of soil; Time during which the excavation is required to be open; Allowable degree of risk of slipping which is determined based on the existing structures and new constructed buildings around the excavation area. SLOPE/W is commonly used to assess stability of roadways, rail beds, bridge abutments, and MSE walls both during and after construction. Hence, total pore-water pressures immediately after excavation are lower than the ultimate equilibrium values, leading to a reduction of the average effective stresses in the slope and subsequently threatening stability in the long term. in the long-term condition), the pore water pressure must be known. In order to estimate the factor of safety F s for a slope in terms of effective stress (i.e. Performing Organization Code 8.
This is frequently the greatest source of inaccuracy in slope stability work, since the determination of the most critical conditions of pore water pressure is complex and costly. The Effects of pore water pressure have been studied by Michalowski (1995) and Kim et al (1999) in 2D slope stability problems based on limit analysis method. Author(s) Tommy C. Hopkins, David L. Allen, Robert C. Deen 435 -9.
(deterministic) approach to slope stability analysis and design, the shear strength, slope geometry, external loads, and pore water pressures are assigned specific unvarying values. Shear strength may be decreased by weathering, changes in pore water pressure, and organic material. Porous materials like soils have different design properties under drained and undrained conditions. Water drainage: The presence of water in the soil or the rock mass causes increased pore water pressure. 1 Introduction. Water pressure weakens the ties between the particles and they tend to slip, a fact that reduces the stability of the slope. 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.