) Determine the moment about the base of the retaining wall. 20° 4m y = 16.5 kN/m³ 4' = 30°. 2.5 m 0 = , y= 19.5 kN/m3 'sat $' = 30° c'=15 KN/m²
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- Q5: In the case of the retaining wall depicted below. Calculate the lateral earth fore at rest per unit length of the wall. Determine the location of the resulting force as well as its magnitude. [25] y = 16.5 kN/m $ = 30 C = 0 Ground v Water table 2.5m Yur = 19.3 kN/m 0 = 30 C = 0 2.5m Good LuckCheck external stability of the shown retaining wall. 0.3m + + %3D Conenete Y= 18 h 4= 37° use 5. BM Pan kine actire no soil in frant of tu Wall to.6 + o.8M + 1.2m + Tau = = 230 kwla o.6The soil material is supported by a retaining wall to a height of 6m. The unit weight of soil is 16 kN/m² and the angle of internal friction is 29". Assume the soil is cohesionless. 41. Determine the rest earth pressure on the wall. a. 427.63 kPa b. 148.37 kPa c. 129.078 kPa d. 264.101 kPa 42. Find total active pressure if surcharge of 14kPa is applied on the surface of horizontal backfill. a. 427.63 kN b. 148.37 KN c. 129.078 KN d. 264.101 KN 43. Locate the position of the total pressure from the bottom. a. 0.347 m b. 5.653 m c. 2.226 m d. 3.774 m
- 13.4 A retaining wall is shown in Figure 13.10. Determine the Rankine active force, Pa, per unit length of the wall and the location of the resultant. kN kN IfH %3D 6т, H] %3D Зт, ү, %3D 15.5 m3' V2 = 19.0 m3 30°, Ø2 = 36° and q = 15 kN/m² Ans. Pa kN 141.1 z = 2.04m %3D т Surcharge = 4 Sand YI H1 cj = 0 Groundwater table Sand Y2 (saturated unit weight) cz = 0 Frictionless wall Figure (13.10)FDE 002: A retaining wall 7m high supports a cohesionless soil having a dry density of 1620 kg/m³, angle of shearing resistance is 33 degrees and void ratio of 0.68. The surface of soil is horizontal and level with the top of the wall. Neglect wall friction and use Rankine's formula for active pressure of a cohesionless soil. Determine the thrust on the wall in kN per lineal meter if owing to inadequate drainage, it is waterlogged to a level 3m below the surface. Select the correct response: 206.24 KN 154.28 KN 179.47 KN 168.73 kN12.2 ), Figure P12.2, and the following values to determine the at-rest lat- eral earth force per unit length of the wall. Also find the location of the resultant. H = 5 m, H1 = 2 m, H, = 3 m, y = 15.5 kN/m², yt = 18.5 kN/m², 4' = 34°, c' = 0, q = 20 kN/m², . Repeat problem when water level Groundwater at ground surface. Figure P12.2
- 2- Figure below shows a retaining wall that is restrained from yielding. Determine the magnitude of the lateral earth force per unit length for the following conditions: 1) At-rest force 2) Passive force Also, find the location of the resultant, 7, measured from the bottom of the wall. H (ft) H1 (ft) 71 (lb/fr) 72 (lb/ft³) p'ı q (lb/fr²) 10 5 90 122.4 34 26 100 Surcharge = q Sand c{ = 0 Groundwater table H Sand Y2 (saturated unit weight) có = 0 Frictionless wallConsider the wall shown below. Dimensions are in meters. sand O' = 30 0.5 0.5 > 1 K Determine the active force acting on the wall. Circle your answer. b. а. Determine the FS for sliding. Circle your answer. Determine the FS for overturning. Circle your answer. d. Determine the FS for overturning if a row of tiebacks is placed 2 meters below the backfill's ground surface. Tieback spacing is 2 meters. The capacity of each tieback is 50 kN. Circle your answer. C.12.6 For the retaining wall, H = 8 m, 6' = 36°, a = 10°, %3D y = 17 kN/m', and e' = 0. a. Determine the intensity of the Rankine active force at z 2 m, 4 m, and 6 m. b. Determine the Rankine active force per meter length of the wall and also the location and direction of the resultant. 12.7 Given: H = 7 m, y = 18 kN/m', ' = 25°, c' = 12 kN/m2, and a = 10°. Caleulate the Rankine active force per unit length of the wall after the occurrence of the tensile crack. YI Groundwater table H H. Figure P12.2
- Prob.9. A retaining wall 6 m high with vertical back, supports a cohesive backfill having unit weight 19 kN/m³, apparent cohesion = 26 kN/m², an = angle of internal friction is zero. Calculate_ (i) Depth of tension crack (ii) lateral active earth pressure intensity at base3- Calculate overturning moment about the base of the retaining wall for 3 meter of the wall (i.e., perpendicular to the page). . Note: using the excessive earth pressure calculation such as Mononobe-Okabe method. Y= 20 kN/m k=0.1 k-0.2 Dry Backfill, Course sand H= 5m K-0.3 KF0.4 0 = 35 8 = 20A smooth gravity wall retains a 12 m-high backfill as shown in the figurebelow. The top 8 m is sand, which is underlain by some clay. The soilproperties are as follows:Sand: γm = 18.9 kN/m 3, γsat = 19.8 kN/m 3; φ' = 32°Clay: γm = 20.1 kN/m 3; φ' = 18°, c' = 20 kPaAssuming that the entire soil is in the active state, find the location andmagnitude of the total thrust on the wall.