uestion 5 A slope is to be excavated through a sand having the following properties: Bulk density (pb) = 1890 kg/m 29 O

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Uestion 5 A Slope Is To Be Excavated Through A Sand Having The Following Properties Bulk Density Pb 1890 Kg M 29 O 1 (26.41 KiB) Viewed 17 times

uestion 5 A slope is to be excavated through a sand having the following properties: Bulk density (pb) = 1890 kg/m 29 O kN/m a) If the global factor of safety is to be 1.5 what angle can the slope (5 marks) be excavated to? b) The angle of internal friction above is found on site to vary and a revised factor of safety is suggested as an option. If the global factor of safety for the slope now cannot drop below 1.2 what is the lowest angle of internal friction that the soil could be found to be? (10 marks) Describe how vegetation and groundwater can influence the stability of slopes in cohesive and none-cohesive sols respectively. (5 marks) c)