Explain very briefly the following: 1. What types of slope failure are common in soils?  2. What factors provoke slope failures?  3. What is an infinite slope failure?  4. What methods of analysis are used to estimate the factor of safety of a slope?  5. How does seepage affect the stability of slopes?  6. Difference between Culmann’s method and Swedish circle method for slope stability analysis

Explain very briefly the following: 1. What types of slope failure are common in soils?  2. What factors provoke slope failures?  3. What is an infinite slope failure?  4. What methods of analysis are used to estimate the factor of safety of a slope?  5. How does seepage affect the stability of slopes?  6. Difference between Culmann’s method and Swedish circle method for slope stability analysis

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter13: Slope Stability

Section: Chapter Questions

Problem 13.12P

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Explain the following in a few words:1. What are the most typical kinds of slope failure in soils?2. What causes the breakdown of a slope? 3. What is a failure with an infinite slope? 4. What types of analysis are utilized to calculate a slope's factor of safety? 5. How does seepage impact the slope's stability? 6. For slope stability analysis, what is the difference between Culmann's approach and the Swedish circle method?
Describe the Description of terms and basic method for slope stability analysis.
Calculate the factor of safety in terms of slope stability using the Cousin's Chart method of the soil, the information of which is given below
Consider a slope given below with 10 slices, which has a circular failure surface. Each slice has 5 meters wide, and the weight of each slice was estimated on the basis of average height and a unit weight of soil ? = 16 kN/m3. The shear strength of the soil is assumed to be ? = 20 kPa and ? = 20°. The pertinent data for these ten slices is given in the table below. a) Determine the factor of safety using Janbu’s simplified method by assuming the initial ?? = ?. ?. b) Discuss how the factor of safety (stability of the Slope) will change due to the rainfall. You start to consider what environmental conditions will change first.
REMIDAL MEASURES FOR SLOPE STABILITY
Herbaceous vegetation is used to protect and stabilize the slope. As shown in the figure, try to calculate the stability and safety factor FS=?It is known that c'=effective soil cohesion (t/m^2); θ=effective soil friction angle; ▲c'=effective soil cohesion due to root system increase (t/m^2); r1=soil above groundwater level Unit volume weight (t/m^3); r2 = unit volume weight of soil below the groundwater level (t/m^3); Ws = total weight of abcd soil above the potential sliding surface (t/m)
A house with 932 kN weight is built on a steep slope defined by points A, B, and C. To help assess the possibility of slope failure (mud slide), determine the components of the weight in directions normal (perpendicular) to the slope. The rectangular form of the weight and the component of the weight perpendicular to the slope defined by the points A, B, and C.
(c) As a designer, one is required to anticipate the potential failure mode of slope and choose the most appropriate analysis method for each slope. By referring to the previous question, (i) Explain the anticipated slope failure mode for site A as explained in the previous question. The explanation must be based on the observed site condition and supported by the relevant theories. The explanation must also be supported by a relevant sketch of potential failure mode of slope.
Which of the following statement is incorrect? (a) The maximum stable slope in a coarse-grained soil (φ’= x o), in the absence of seepage, is x o (b) Taylor’s method can be used to assess long term slope stability (c) Slopes with clay should be assessed using both short-term and long-term loading conditions (d) The maximum stable slope in a coarse-grained soil (φ’= x o), in the presence of seepage, is half of x o x = 25
2. what are the factors affecting the stability of soil slope?
You are required to analyse a slope stability problem using the Swedish method for failure along the slip surface as shown in the figure below. The slope is inclined at an angle of 30° to the horizontal and has a height of 10 m. The ground water table (GWT) is located at a depth of 5.1 m below the crest. It goes along the slope and reaches at the toe level as shown in the figure. Soil investigation revealed that the site consists of a layer of silty clay overlying a layer of sand. Assume c = (40 + 2x) kPa and ϕ = 10° for the silty clay, and c = 0 and ϕ = (30 + x)° for the sand layer; where x is the last digit of your student ID (e.g., if your student ID is 5746189, x = 9). All slices have equal width (b = 2.89 m) and the slices are numbered 1‒6 from left to right. The coordinates of the midpoint of the bases (M , M , M , M , M , M ) of the slices are shown on the right side of the figure. The weights of slices 1‒6 are as follows (in kN/m): W1 = 53.5, W2 = 141.3, W3 = 199.6, W4= 224.8,…
EXPLAIN THE PROPERTIES OF SOILS OF A SLOPE GRADIENT WITH A DIAGRAM .