A loose, natural sand deposit has a saturated unit weight of 19.3 kN/m3 and an angle of internal friction of 29°. The water table is the ground surface. The total at rest lateral earth pressure at a depth of 10 m is most nearly:

A 2m clay layer has values of e = 0.92 , Gs = 2.72 and liquid limit of 40%. Above the clay is a 3m thick layer sand with e = 0.50 and Gs = 2.62. The water table is located 1.6 m below the ground surface having a unit weight of 17.3 kN/cu. Meter, determine the following: a. Compression index of clayb. Effective pressure at the midpoint of clayc. Primary settlement for normally consolidated clay.......

Estimate the lateral earth pressure at a depth 20 ft (6.1 m) below the ground surface in a loose sand deposit. The wet unit weight of the sand is 115 pcf (19 kN/m3). What would the total lateral pressure be if the water table rose to the ground surface (in psf or kPa)?

Soil mechanics

Compute geostatic stress at point A y= 15.0 kN/m³ V Y= 16.8 kN/m³ Y= 17.2 kN/m³ 2.0 m 2.5 m 3.6 m 10.9 m SC 1.6 m B SM Silty sand CL Clay

Question 32 A dense silt layer has the following properties: void ratio = 0.66, specific gravity = 2.5. Free ground water is 9.47 m. below the ground. Capillary action rise will reach 6.66 meters. The soil above capilary action rise is dry while within the zone, it is saturated at 52.77%. Determine the effective pressure (in kPa) at a depth of 7.42 meters from the ground surface. Round off to three decimal places.

In typical deposit of submerged soil, the approximate depth at which the inter-granular pressure is equal to 60 kN/m² is: (Ysat = 30 kN/m³)

): A 12 m depth of sand layer has a dry unit weight of 18 kN/m³ and submerged unit weight of 11 kN/m' overlies a 7 m layer of normally consolidated clay below which is an impermeable stratum. The properties of clay layer are (Gs= 2.76, w-40.5%, L.L= 48%, c,= 1x10² cm²/sec). The water table was 5 m below natural ground surface. The average increase in pressure at the center of the clay layer is 120 kN/m² due to the weight of a building that constructed on ground surface. Determine: 1- The expected total primary consolidation settlement. 2- Time required for ultimate consolidation settlement. 3- Excess p.w.p at point located 1.75 m below the surface of clay layer after 6 months of applying loading. was=se. 4- Permeability of clay layer

Ans.: ov= 0.844 kN/m2 0.6 1.2 1.8 2.4 3.0 3.6 4.2 4.8 Head (m) (cr 5.7 In a certain sand deposit, with ysat = 20 kN/m3, the water table is at the ground surface. Compute the total stress, pore pressure, and effective stress on a horizontal plane at a depth of 4.5 m for each of the following cases: a. Static groundwater. b. Upward flow under a gradient of 0.5, Ans.: (a) ov = 45.86 kN/m?, (b) o, = 23.78 kN/m? 5.8 A jar 100 cm high and 10 cm2 in cross-sectional area is filled with soil and water having an overall average unit weight of 10.57 kN/m3. The specific gravity of the soil is 2.80. For each of the following three cases compute ov, u, and, o'v, at the bottom of the jar: Uniform slurry. b. The sediment of soil 5 cm thick and seawater, Yw = 10.07 kN/m3. c. The sediment of soil 6 cm thick and pure water, Yw = 9.81 kN/m. For cases (b) and (c) compute the void ratio of the sediments. Ans.: (a) o, = 10.57 kN/m?, u = 9.81 kN/m², ov = 0.76 kN/m?, (b) a, = 10.567 kN/m2, u = 10.07 kN/m2, ov…

From the given figure. Determine the total active lateral pressure at the interface in kPa.