The results of two consolidated drained triaxial tests are as follows: Test o,(kN/m²) Ao,(kN/m²) 66 91 134.77 169.1 Determine e and dh. Also determine the magnitudes of the normal and shcar stress on the planes of failure for the two specimens used in the tests.

Q18 Please provide justified answer asap

# 3) A sand soll sample is subjected to a direct shear test under a normal load of 185 kPa. The specimen failed when the shear stress reached 100 kPa. If the normal load is increased to 240 kPa, what will be the shear strength of the specimen?

Two drained triaxial compression tests are carried out on "identical" specimens of clean sand. In each test, a fully saturated specimen is consolidated to a confining stress and then failed by increasing the vertical stress. The test results are summarized in the following table. Assume the specimens in these two tests are uniform and have the same density. Cell pressure Deviatoric stress q (kPa) σ3 (kPa) Test No. Test 1 (Drained) Test 2 (Drained) Test 2a (Undrained) 100 200 200 Peak stress state 270.0 540.0 150.0 Residual state (or critical state) 200.0 400.0 70.0 (a) Using the results of Tests 1 and 2, determine the effective friction angle of the sand at peak failure state. (b) What is most likely the orientation of the shear failure plane in Test 1? (c) When repeating Test 2, the technician did not open the drainage valve by mistake when shearing the specimen after consolidation. In other words, the consolidated specimen was sheared under the undrained condition. The maximum…

Ex Two identical soil samples (A) and (B) of a fully saturated N.C.C. were tested. Sample (A) was subjected to an unconfined compression test and failed when the deviator stress (OT-13) was (200) kN /n². Sample (B) was tested under UU conditions with a cell pressure of (300) kN/m². The pore water pressure at failure. was (200) kN/m². a) What was the pore water pressure at failure in sample (A). b) If C=o, Find (2) for this clay. (Itint. Start with soil B, and that (OJ) un= (FJ) afined). unconfined

A CID TXC test was performed on a sample of sand. At the end of consolidation, the back pressure was 140 kPa, and the cell pressure was 340 kPa. At failure, the deviator stress was (ơ1 – 03)f = 200 kPa. a. What was the total pore water pressure, u, at failure? b. Calculate the principle effective stresses, ơi' and os', at failure. c. Calculate the friction angle, d', for this soil.

Note) For soil sample in Table 2, initial thickness of sample = 14.31 mm, sample area = 2827.433 mm^2, dry weight measured at the end of test = 52.53 g, specific gravity = 2.7 Also, Determine the compression index and expansion index Please show graph