A shearbox test was performed in the laboratory on a soil sample with box dimensions of 60 x 60 mm. The test was performed under undrained conditions and displacement was measured up to failure (i.e the dial gauge displayed a reverse reading). Analyze the test data in the table that follows and do the following:  
 Provide the shear stress against shear distance curves on graph paper

1.2 Determine the maximum shear stress at 15% of the shear box length. Indicate clearly where the shear stress occurred. 1.3 Calculate the normal effective stress on each sample. Show all calculations. 1.4 Determine the strength parameters and use the correct units of measurement. Use graph paper and add these answers on the graph. 1.5 A structure is to be built on the soil that was tested with an expected normal stress of 200 kPa and soil shear stress of 75 kPa. Will the soil be capable of supporting the structure, and state the reasons for your answer? Shear Distance 1 2 3 4 5 16 7 8 9 10 11 Normal Force N Sample 1 188 324 417 521 617 690 780 845 885 906 2203 Shear Force N Sample 2 248 547 692 779 859 1026 1140 3046 Sample 3 340 564 756 887 1023 1163 1243 1342 1426 1515 1573 4298