12. A backfill of a retaining wall consists of y=19 kN/m³ which is 6 m high. Find the total earth pressure per meter length. Given coefficient of earth pressure at rest is 0.5. a) 165 kN/m b) 178 kN/m c) 171 kN/m d) 345 kN/m
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- Situation 13. A river is 3 m deep with the riverbed consisting of a thick bed of sand having a saturated unit weight of 19.0 kN/m3³. Determine the resulting effective vertical stress at 4 m below the riverbed for the following conditions: 36. The water level stays the same. a. 36.80 kPa b. 47.20 kPa 37. The water level rises by 2 m. a. 51.1 kPa b. 36.80 kPa 38. The water level drops by 2 m. a. 26.30 kPa b. 36.80 kPa c. 26.30 kPa d. 51.10 kPa c. 47.20 kPa d. 26.30 kPa c. 47.20 kPa d. 51.10 kPa.Figure 4-2 is the cross-section of an earthwork (s.g.=2.5) dam. Assuming that hydrostatic uplift varies linearly from one-half the hydrostatic head at the upstream of the dam to zero at the downstream edge, find thea)maximum pressure intensity in the base of the dam (lb/ft3)b)minimum pressure intensity in the base of the dam (lb/ft3)Determine the active Rankine earth pressure (magnitude and location) against the 1-foot thick retaining wall in the figure at right. 15 ft 1.5 ft 2 ft 4 ft Sand c=0 1 = 28° Y = 127 lb/ft³
- Question 2 For the gravity retaining wall (concrete) shown in figure below; if the angle B has changed to be 80°, Ø1= 29°; and a = 5° use Coulomb's theory to calculate the horizontal and vertical components of the active earth pressure. %! Y-18.5 kN/m :-32 5.7 m 5m 283 m P. 75 2.167 m 1.5 m 1.53 m 0.8 m 0.22 m - 18 KN/m 0.3 m 0,8 m :-24 3.5 m 30 KN/m?Q: The following figure shows a soil system supported by a 3m high retaining wall. This is normally consolidated soil and the wall has been restrained from yielding. Determine the lateral force Po, exerted by the soil system on per unit length of wall. [Yw = 9.81 kN/m³] H = 3m A B С c'=0 $ 20⁰ y = 15 kN/m 3 c'=0 Ø Y sat 20° 18 kN/m3 2mSITUATION 16: For the silty soil shown, the water table is located 8 m below the soil surface. The sieve analysis indicates the diameter corresponding to 10% finer in the particle-distribution curve is 25 cm. Due to capillary action the layer at the zone of
- A6 m high retaining wall retains 3 m of Soil 1 which overlays Soil 2 as shown in the figure. The water table is at the interface of the two sods. The tod properties the active earth pressure and hydrostatic pressure distributions are also shown in the figure. The magnitude of the active earth pressure at Point of the pressure distribution is Soil 1: e-0, -30° Y-17kN/m' 3 m 6 m Soil 2 e 10 kPa, -20° You 20 kN/m² + hydro- static O 17.0 kPa O 11.0 kPa Ⓒ25.0 kPa O 29,4 kPaA retaining wall 9 m high supports a cohesionless sandy soil with its face vertical as shown in figure below. Find active earth pressure on the wall , Take Yw = 9.81kN / (m ^ 3)(a) Calculate and draw the active earth pressure distribution acting on the smooth wall shown in Figure 4. The water table is at the interface of the soil layers; 2 m 4 m Sand 1: c= 0, += 30° 7 = 16 kN/m³ Sand 2: c= 0, += 38° Figure 4 sat = 21 kN/mm³
- An embankment consists of clay fill for which c=25 kPa and angle of internal friction is 260 9from consolidated undrained test with pore pressure measurement) The weight of fill per unit volume is 18.64 kN/m3. Compute the stress in kPa at depth of 20 m. a. 192.8 b. 62.5 c. 21.6 d. 372.8(a) Calculate and draw the active earth pressure distribution acting on the smooth wall shown in Figure 4. The water table is at the interface of the soil layers; 2 m + 4 m Sand 1: c= 0, $ = 30° 7 = 16 kN/m² Sand 2: c = 0, += 38° 7sat = 21 kN/m³H.Q 5 Figure below shows an embankment load on a silty clay soil layer. Determine the stress increase at points A, B, and C that are located at a depth of 5 m below the ground surface. + 6m Center line IV:2H IV:2H 10m y =17 KN/m II