A soil element in the field may go through various complicated stress paths during the lifetime of
Question:
Task 1: Establishing the failure line in the p' q space
The following table shows the results of a series of consolidated-drained triaxial tests on a medium dense granular soil. Draw the stress paths for each test in the p'q space. Also, establish the failure line going through the origin and connecting the failure points (p'f, q'f).
Ï3(kN/m2) (ÎÏd)f (kN/m2)
150...............................527
275...............................965
350.............................1225
450.............................1580
510.............................1800
Task 2: Loading the specimen through a specified stress path A soil specimen is loaded along the stress path O (0, 0), P (250, 0), and A (675, 1000) under drained conditions to reach point A close to the failure line established in Task 1 (Figure 12.58). Determine the combinations of confining pressure and deviator stresses applied to the triaxial specimen at O, P, and A in order to follow the stress path O-P-A.
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