6. The infinite sand slope shown in the figure is one the verge of sliding failure. The ground water table coincides with the ground surface. Unit weight of water Yw = 9.81 kN/m³. 5m 120° y = 21 kN/m² The value of the effective angle of internal friction (in degrees upto one decimal place) of the sand is
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- 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 22. Consider a rectangular footing 3.2 m x 4.5 m to be constructed in a uniform clayey sand to support allowable loads as shown in Figure Q2. Assuming general shear failure would take place, determine the safety factor against bearing capacity failure when the ground water table is at 1.0 m above the ground surface. Comment on the obtained result.
- A large symmetrical drum for drying sand is operated by the geared motor drive shown. If the mass of the sand is 760 kg and an average gear-tooth force of 3.00 kN is supplied by the motor pinion A to the drum gear normal to the contacting surfaces at B, calculate the average offset of the center of mass G of the sand from the vertical centerline. Neglect all friction in the supporting rollers. Assume r = 150 mm, R = 665 mm, 0 = 24° Detail of contact at B 27² A Answer: x= i B R •G mmA 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?As per Rankine's formula the passive earth pressure at a depth 8 m in dry cohensionless and with angle a integral frication of 38 deg and unit weight of dry sand as 200 kg/m³ (take value of sin 38 degree as 0.6157)
- 2: An embankment shown in the figure is constructed. compute the vertical stress increment under Points A. B. and C at z = 10 m Use vertical stress Increment under an embankment loads? 10 m 12 m 10 m Y₁-192 kN/m² Take value of 15 from chart s6v=9[s027 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 17Given data: Depth of Clay layer =4Depth of Sand layer=2unit weight of clay kN/m3=23unit weight of sand kN/m3 =21Ø in both layers=30C´= 0
- 3 A soil profile consists of a clay layer underlain by a sand layer, as shown in the figure. If a tube is inserted into the bottom sand layer and the water level rises above the ground surface, Determine the effective vertical stress in kPa at B. * 3.2 m GWL ↑1 m Yst = 18.5 kN/m³ %3D Clay 2 m Ysat = 19.0 kN/m³ %3D |1.5 m Ysat = 17.0 kN/m³ %3D Sand В 2 m The value must be a numberQ2/ Calculate the vertical stress in a soil mass at a depth of 5m vertically below a point load of 5000 KN acting Variation of vertical stress. (up to lom) at adepth Sm. QIP √₂ = 2² 3 [p = 2-11 [11 1+ (글)2. 5/2 near the surface. Plote the with radial distanceSand is placed on a rock slope, as shown in Figure Q2. (a) Show that sand will be stable (i.e., no sliding sliding) ifSEE MORE QUESTIONS