Steel plate Clay specimen FIGURE P2.22

Please answer all questions based on the scenario Question #1:                                                  Considering the water upstream of the dam, a) What will be the seepage loss of that water downstream per year? b) What will the uplift force be on the dam? Question #2: What would the stress in the center of the dam be at the middle of the bottom layer? Consider both the overburden pressure and that due to the loading. Question #3: A sieve analysis was performed on a sample of the top layer of the soil, with the results shown below:   Sieve Size (in.)   1/2   3/8 No. 4 No. 8 No. 16 No. 30 No. 40 No. 50 No. 100 No. 200   pan Amount retained (g) 0 0 21.6 39.5 77.6 102.6 89.1 95.6 90.6 60.4 33.3 Do the following: a) Calculate the percent retained and percent passing each sieve, and graph the results on a semi-log graph (you may use the attached chart, or graph in Excel and include with your submission). Then, characterize…

Explain how the shear strength of sand changes with respect to suction in various zones.

In a laboratory compression test, the void ratio in a soil sample changes from 1.46 to 1.32 when the compressive loading increases from 100 kN/m2 to 200 kN/m2. Calculate the value for the coefficient of compressibility and the compression index for this load range.

For a direct shear test on a soil having USCS classification SP, the shear stress at failure was 45.5 kPa for a normal stress of 65 kPa. What is the effective friction angle for this material? Sketch and label the Mohr's Circle and Mohr-Coulomb failure envelope.

An intact solid cylindrical specimen of diameter 50 mm and thickness 30 mm is prepared from a Hoek-Brown rock material with m,= 10. If the disc fails under a diametral compressive force of 7.8 kN as shown opposite, determine the brittleness index of the tested material based on stresses induced at the centre of the loaded specimen; i.e., the ratio of the material's compressive to tensile strength. Assume that the Hoek-Brown failure criterion is valid for the plane stress field condition developed at the centre of the specimen. 7.8 kN P B

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A triaxial test performed on a clay sample, under unconsolidated–undrained conditions, reaches a maximum (failure) axial stress (major principal stress) of 106 kPa when the confining stress (minor principal stress) is 40 kPa. What is the value of cohesion, cu (undrained shear strength) for this sample? If another sample of the same soil is tested in an unconfined compression test, what axial load is expected to cause failure

# 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?

Data from an oedometer test using a clay specimen are plotted in the graph shown below. If the compression index is equal to 0.6, calculate the void ratio (e2) missing at Point C, which is associated with a vertical effective stress equal to 105 kPa