Question 3 a) List and describe (with the use of diagrams) the four main failure mechanisms for soil slopes 16 marks b) Briefly describe four ways in which soil slope instability can be caused 8 marks c) Figure 2 (below) shows the geometry of an 8 metre high soil slope The clay soil has an undrained shear strength of 45kPa and a unit weight of 19kN m The slope face has an inclination angle (B) of 27 Located immediately beneath the clay layer is strong mudstone bedrock Using the Taylor method, calculate the Factor of Safety for the slope 9 marks 8m B 15m Mudstone Bedrock Figure 2 POIKASET sh FE M MO TI ta S ANA HI W 12 953

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Question 3 a) List and describe (with the use of diagrams) the four main failure mechanisms for soil slopes   16 marks  b) Briefly describe four ways in which soil slope instability can be caused   8 marks  c) Figure 2 (below) shows the geometry of an 8 metre high soil slope  The clay soil has an undrained shear strength of 45kPa and a unit weight of 19kN m  The slope face has an inclination angle (B) of 27  Located immediately beneath the clay layer is strong mudstone bedrock  Using the Taylor method, calculate the Factor of Safety for the slope   9 marks  8m B 15m Mudstone Bedrock Figure 2 POIKASET   sh     FE           M MO TI ta S    ANA HI W 12 953

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Question 3 a) List and describe (with the use of diagrams) the four main failure mechanisms for soil slopes. [16 marks] b) Briefly describe four

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