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Unformatted text preview: CEEN 641 ADVANCED SOIL MECHANICS HOMEWORK ASSIGNMENT #13 Refer to the following figure for Problems 1 through 4: 1. For the sample shown, estimate the soils peak friction angle ( tc ) using Boltons method. The sample is subrounded, poorly graded sand consisting primarily of quartz and has the following index properties: D 50 =0.20 mm, D 10 =0.14 mm, C u =1.6, e min =0.7, e max =1.1, and G s =2.68. 2. For the sample shown, develop two estimates of the soils friction angle based on PH&T (1974) and Bowles (1996) correlations if the field SPT blow count is 8. Correct for hammer energy efficiency (assumed to be 75%) and overburden as needed. 3. For the sample shown, estimate the soils friction angle if the measured CPT tip resistance (q c ) is 58 kg/cm 2 . 4. The results from a series of CD triaxial compression tests with three different confining stresses performed on sand from the soil profile shown are provided below: Change in Volume at Peak Point, V (in 3 ) Initial void ratio...
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