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.
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.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Question
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.
Transcribed Image Text:center
Radius, R
10
5
2 3
10 slices
41
Transcribed Image Text:Width
Height
Weight
(kN)
Slice
(m)
(m)
(kPa)
(deg)
(deg)
5.0
2.0
160.0
20.0
20.0
-19.2
-114
20.0
2
5.0
6.0
480.0
20.0
5.0
5.0
5.0
9.0
720.0
20.0
20.0
-3.8
11.5
13.5
4
920.0
20.0
20.0
3.8
11.4
19.2
5
1,080.0
20.0
20.0
5.0
14.5
1,160.0
1,200.0
1,160.0
20.0
20.0
7
5.0
15.0
20.0
20.0
27.4
8
5.0
14.5
20.0
20.0
36.2
9
5.0
12.0
960.0
20.0
20.0
46.2
10
5.0
5.0
400.0
20.0
20.0
58.6
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