. A soil deposit consists of three horizontal layers of soil: an upper stratum A (1m thick), a middle stratum B (2m thick) and a lower stratum C (3 m thick). Permeability tests gave the following values: Soil A, k = 0.3 mm/sec; Soil B, k = 0.2 mm/sec; Soil C: k=0.1 mm/sec. a) Determine the ratio of the average coefficients of permeability of the soil deposit (all three layers) in the horizontal and vertical direction. b) Beneath the deposit there is a gravel layer subjected to artesian pressure, the surface of the deposit coinciding with the ground water level. Standpipes show that the fall in head across soil A is 150 mm. Determine the value of the water pressure at the top of the gravel.

2-13. The wet unit weight of a soil sample is 18.55 kN/m³. Its specific gravity of solids and water content are 2.72 and 12.3%, respectively. Find the dry unit weight, void ratio, and degree of saturation. 2-14. A fine sand has an in-place unit weight of 18.85 kN/m³ and a water content of 5.2%. The specific gravity of solids is 2.66. Void ratios at densest and loos- est conditions are 0.38 and 0.92, respectively. Find the relative density.

A soil profile is shown in Figure.Plot the variation of:

The field unit weight of the soil is 1960 kg/m³ and the unit weight of the soil particle is 2700 kg/m3 . If the emax=0.69 and emin=0.44, a)Compute the void ration of the soil sample. bCompute the dry unit weight in KN/ m3 if water content is 11%. cCompute the relative density of the soil sample. A soil having a sp. Gr. of 2.74 has a moist unit weight of 20.6 KN/m3 and a moisture content of 16.6%. a Compute the void ratio. bCompute the degree of saturation. cCompute the effective unit weight. dCompute the weight of water in KN to be added per cu. m. of soil for 100% degree of saturation.