11. A soil has an angle of internal friction of 25°, The Rankine active earth pressure coefficient is nearly a. 0.34 b. 0.41 c. 0.52 d. 0.58
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- = A soil profile at a site consists of a 5 m of gravelly sand (ysat = 18.5 kN/m³; ym 17.0 kN/m³) layer underlain by 4 m of sandy gravel (Ysat = 18.0 kN/m³). The water table is 4 m below the ground level. Plot the variation of ov, o'v, and u with depth. Neglect the capillary effects.Calculate the effective vertical stress at point A in the soil profile shown below (g=10m/s2) a. 105.9kPA b. 93.7kPA c. 106.1kPA a. 159.1kPAQuestion 1 a) Determine the factor of safety, for the short-term condition, of the embankment shown inFigure 1, for the potential failure circle indicated. b) Determine the FS for the embankment given in Figure 2, if the soil used is clay and the embankment is surrounded by water to its crest level. (9.8m 145m £3 m. Bm clay DIT Cu 50 kPa 8=19 k lm3 R=20m 5m 1m Saturarteal clay %3D Figure 2
- A sandy soil with k = 3×10² cm/s contains a series of 5 mm thick horizontal silt layers spaced 300 mm on center. The silt layers have k= 5×10° cm/s. Compute k, and k̟ and the ratio k,/k. %3D027 ncomect Consider the soil system shown below. 1m Water Fine 4m sand k 2 x 10 mm Coarse silt 4m k = 4 x 10 mm/s Fine 4m silt k 2 x 10 mm/s Datum Beneath the fine silt layer there is stratum of water-bearing gravel with a water pressure of 155 kPa. The surface of the sand is flooded with water to a depth of 1m. The excess hydrostatic head at the fine sand/coarse silt interface is cm. Your Answer 32 15 17SITUATION 6: A deposit of clay underlain a 4.5 m thick sand. Degree of saturation of sand is 37% and void ratio is 0.52. Moisture content of clay is 42%. Natural ground water table is located at 2m below the Natural ground surface. Assume that specific gravity of sand and clay are both. equal to 2.65.. 15. Compute the unit weight of sand above water table. a. 17.345 kN/m b. 19.345 kN/m² 18.345 kN/m³ d. 20.345 kN/m 16. Compute the total pressure at point 10m below the ground surface. a. 163.925 kPa c. 193.925 kPa 173.925 kPa d. 183.925 kPa 17. Compute the effective pressure at point 10 m below the ground surface. 105.445 kPa b. 106.445 kPa d. 108.445 kPa 107.445 kPa c.
- Calculate 6,µand 6' with depth. H1 = 6 ft, H2 = 4 ft. H3= 9.0 feet Degree of Saturation in capillary rise zone ,S= 50% Dry sand Gs = 2.68, e=0.543 Clay Gs = 2.735 , e = 0.765 Bottom clay Gs = 2.752, e= 0.967 H3 Dry sand Clay; zone of capillary rise Clay Rock ーミSITUATION 6: A deposit of clay underlain a 4.5 m thick sand. Degree of saturation of sand is 37% and void ratio is 0.52. Moisture content of clay is 42%. Natural ground water table is located at 2m below the Natural ground surface. Assume that specific gravity of sand and clay are both. equal to 2.65.. 15. Compute the unit weight of sand above water table. a. 17.345 kN/m² b. 19.345 kN/m 18.345 kN/m³ d. 20.345 kN/m³ 16. Compute the total pressure at point 10m below the ground surface. a. 163.925 kPa c. 193.925 kPa 173.925 kPa 183.925 kPa 17. Compute the effective pressure at point 10 m below the ground surface. 105.445 kPa b. 106.445 kPa d. 108.445 kPa c. 107.445 kPaSITUATION 2: A sample of dry soil is subject to a tri-axial test and is found to have an angle of friction equal to 29° and a minor principal stress of 150 kPa. 8. Determine the deviator stress of failure of the soil sample. a. 282.309 kPa b. 186.556 kPa c. 1046.36 kPa d. 141.155 kPa 9. The value of major principal stress óf failure. b. 366.556 kPa d. 432,309 kPa a. 291.155 kPa c. 1196.36 kPa 10. The normal stress when the soil where shear occurs on the failure plane is most likely equal to: a. 282.998 kPa c. 222.721 kPa b. 272.721 kPa d. 232.998 kPa
- SITUATION 1: A deposit of clay underlain a 4.5 m thick sand . Degree of saturation of sand is 37% and void ratio is 0.52. Moisture content of clay is 42%. Natural ground water table is located at 2m below the Natural ground surface. Assume that specific gravity of sand and clay are both equal to 2.65. 3. Compute the unit weight of sand above water table. a. 17.345 kN/m³ b. 19.345 kN/m³ c. 18.345 kN/m³ d. 20.345 kN/m3 4. Compute the total pressure at point 10m below the ground surface. a. 163.92 kPa b. 173.92kPa c. 193.92 kPa d. 183.92kPa 5. Compute the effective pressure at point 10 m below the ground surface. a. 105.445 kPa b. 106.445 kPa c. 107.445 kPa d. 108.445 kPa S= 0.37 2 m e = 0.52 Gs = 2.65 Sand 4.5 m 2.5 m Clay 5.5 m PA O = 42% Gs = 2.65A soil profi le consists of a clay layer underlain by a sandlayer, as shown in Figure P7.17. If a tube is inserted intothe bottom sand layer and the water level rises to 1 mabove the ground surface, determine the vertical effective stresses and porewater pressures at A, B, and C. IfKo is 0.5, determine the lateral effective and lateral totalstresses at A, B, and C. What is the value of the porewater pressure at A to cause the vertical effective stressthere to be zero?Q: Water is flowing through a soil as shown in the figure. Pressure head at C (i.e. uc) is 8m. Determine the value of "x" and total head at D (i.e. hp). F E| X 2 m 3 m 1m 4m Datum 43 B CF D DI Soil