Soil Mechanics and Foundation
Bishop’s method of stability analysis

is more conservative
All of these
neglects the effect of forces acting on the sides of the slices
assumes the slip surface as an arc of a circle

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Soil Mechanics and Foundation
The shear strength of a soil

Decreases with decrease in normal stress
Is directly proportional to the angle of internal friction of the soil
Decreases with increase in normal stress
Is inversely proportional to the angle of internal friction of the soil

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Soil Mechanics and Foundation
A cylindrical specimen of saturated soil failed under an axial vertical stress of 100kN/m2 when it was laterally unconfmed. The failure plane was inclined to the horizontal plane at an angle of 45°. The values of cohesion and angle of internal friction for the soil are respectively

0.05 N/mm² and 45°
0.05 N/mm² and 0°
0.2 N/mm² and 0°
0.5 N/mm² and 30°

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