Plot the strength envelope of the soil on graph paper with respect to (a) total stresses, and (b) with respect to effective stresses. Plot both conditions on the same graph paper and label them clearly. (See the sketch as an example below). Show how calculations are completed. A neat table is required.

 

The following results refer to a series of triaxial tests on specimens of saturated clay, initially 38mm in diameter and 76 mm long: Type of Test Axial Defor- Volumetric All-Round Azial Load Pressure (kPa) (N) mation (m) Change (ml) 200 222 9,83 No change Undrained 400 215 10,06 No Change 600 226 10,28 No Change 200 467 10,81 -6,6 ml Drained 400 848 12,26 -8,2 ml 600 1265 14,17 -9,5 ml Determine the value of the shear strength patameters with respect to: (a). Total stress (b). Effective stress Plot the strength envelope of the sail on graph paper with respect to (a) tota stresses, and