A soil profile consists of 5 m of sand overlying 4 m of clay overlying fractured...

 

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A soil profile consists of 5 m of sand overlying 4 m of clay overlying fractured bedrock. Groundwater level (GWL) is 2 m below the horizontal surface of the sand and a piezometer in the fracture rock rises to 2m below the surface of the sand. Determine the distributions of total vertical stress, porewater pressure and effective vertical stress with depth down to bedrock, given: i. total unit weight of the sand above GWL = 17 kN/m ii. saturated bulk unit weight of the sand below GWL = 20.5 kN/m iii. saturated bulk unit weight of the clay = 19.0 kN/m iv. hydraulic conductivities: clay 1.5x10' cm/s and sand 1x10 cm/s. %3D A soil profile consists of 5 m of sand overlying 4 m of clay overlying fractured bedrock. Groundwater level (GWL) is 2 m below the horizontal surface of the sand and a piezometer in the fracture rock rises to 2m below the surface of the sand. Determine the distributions of total vertical stress, porewater pressure and effective vertical stress with depth down to bedrock, given: i. total unit weight of the sand above GWL = 17 kN/m ii. saturated bulk unit weight of the sand below GWL = 20.5 kN/m iii. saturated bulk unit weight of the clay = 19.0 kN/m iv. hydraulic conductivities: clay 1.5x10' cm/s and sand 1x10 cm/s. %3D