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MindTap Engineering for Das/Sobhan's Principles of Geotechnical Engineering, 9th Edition, [Instant Access], 2 terms (12 months)
9th Edition
ISBN: 9781305971257
Author: Braja M. Das; Khaled Sobhan
Publisher: Cengage Learning US
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Chapter 13, Problem 13.7P
To determine
The total force per (P) unit length of the wall due to the strip loading.
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QUESTION 4.
A retaining wall 6 m high with a vertical back face retains a homogenous saturated soft clay. The saturated unit weight of the clay is 19 kN/m3. Laboratory tests showed that the undrained shear strength, Cuof the clay is 16.8 kN/m3, f=0o.
Do the necessary calculations and draw the variations of Rankine’s passive pressure on the wall with depth
Determine the total passive force per unit length of the wall.
Find the location of the resultant force?
12.6 Refer to Figure 12.10. For the retaining wall, H = 8 m, ' = 36°, a = 10⁰,
y = 17 kN/m³, and c' = 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.
11.7 A retaining wall is shown in Figure 11.22. Determine the Rankine active force, Pa, per unit
length of the wall and the location of the resultant for each of the following cases:
a. H = 12 ft, H, = 4 ft, y, = 105 lb/ft, y=
b. H = 20 ft, H, = 6 ft, y, = 110 lb/ft, y = 126 lb/ft', oi = 34°, d; = 34°, q = 300 lb/ft
122 Ib/ft', i = 30°, = 30°, q = 0
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Chapter 13 Solutions
MindTap Engineering for Das/Sobhan's Principles of Geotechnical Engineering, 9th Edition, [Instant Access], 2 terms (12 months)
Ch. 13 - Prob. 13.1PCh. 13 - Prob. 13.2PCh. 13 - Prob. 13.3PCh. 13 - Prob. 13.4PCh. 13 - Prob. 13.5PCh. 13 - Prob. 13.6PCh. 13 - Prob. 13.7PCh. 13 - Prob. 13.8PCh. 13 - Prob. 13.9PCh. 13 - Prob. 13.10P
Ch. 13 - Prob. 13.11PCh. 13 - Prob. 13.12PCh. 13 - Prob. 13.13PCh. 13 - Prob. 13.14PCh. 13 - Prob. 13.15PCh. 13 - Prob. 13.16PCh. 13 - Prob. 13.17PCh. 13 - Prob. 13.18PCh. 13 - Prob. 13.19PCh. 13 - Prob. 13.20PCh. 13 - Prob. 13.21PCh. 13 - Prob. 13.22PCh. 13 - Prob. 13.23PCh. 13 - Prob. 13.24PCh. 13 - Prob. 13.25PCh. 13 - Prob. 13.26PCh. 13 - Prob. 13.27PCh. 13 - Prob. 13.1CTP
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- A 3.1 m high vertical retaining wall is shown. a. What is the effective vertical stress acting at the base of the wall? b. What is the total active force acting on the wall? c. What is the total active moment on the wall? Please answer this asap. For upvote. Thank you very mucharrow_forwardThe 5-m high retaining wall in Figure 13.40c is subjected to a surcharge strip load of q 5 105 kN/m2 on the ground surface. Determine the total force per unit length of the wall due to the strip loading only.arrow_forward3. Rankine Theory: An 14-ft-high cantilever retaining wall is backfilled with a soil that has a Y = 103 pcf, Ysat = 127 pcf, o'=28" and c' = 0. (a) If water ponds at mid-height behind the wall, calculate the Rankine active force per unit length of wall and (b) Estimate the location of the lateral thrust measured from the bottom of the wall. (Problem 13.13, Das and Sobhan, 2014).arrow_forward
- For the given retaining wall as shown, determine the following: Note: The water table for the given soil profile is located at an H1 depth below the top of the wall. 9, = 20 kPa H = 2 m Ysat = 19 kN/m? O' = 25° H2 = 4 m Ysat = 20 kN/m? O' = 30° a) The total active force on the wall in kN. b) The total active moment at the bottom of the wall in kN-m. c) The required passive force to maintain equilibrium in kN. d) The theoretical passive force in kN. e) The total theoretical passive moment at the bottom of the wall in kN-m.arrow_forwardvertical retaining wall 6 m high is supporting a horizontal backfill of soil having a void ratio of 0.5 and specific gravity of 2.7. Angle of internal friction is 32 degrees. 1. Compute the rankine force active on the wall if there is no water. 2. Compute the rankine active force on the wall if the water is on top of the horizontal backfill level. 3. Compute the rankine active force on the wall if the water table is at the bottom of the wall and the water content is 10%arrow_forward3. Draw the pressure diagram of the retaining wall with the soil profile shown both in active and passive cases. Solve for the active and passive lateral force and its location from the bottom of the wall. 4.5 KPa Gs = 2.73 e = 0.67 Ø = 27° C =0 KPa %3D 4m Gs = 2.66 %3D e = 0.85 Ø = 34° C = 5 KPa 6marrow_forward
- 13.22 Consider the retaining wall shown in Figure 13.38. The height of the wall is 9.75m. and the unit weight of the sand backfill is 18.7kN/m3. Using Coulomb's equation, calculate the active force, Pa, on the wall for the following values of the angle of wall friction. Also, comment on the direction and location of the resultant.arrow_forwardQ.3. A retaining wall is shown in Figure 2. Determine Rankine’s active force, Pa, per unit length of the wall. Also determine the location of the resultant.arrow_forwardis 7 m high with a horizontal backfill. For 12.4 A vertical retaining wall the backfill, assume that y = 16.5 kN/m', ' 26°, and c' = 18 kN/m2. Determine the Rankine active force per unit length of the wall after the occurrence of the tensile crack. For the retaining wall, determine the Rankine active force per unit length of the wall and the location of the line of action of the 12.5 resultant. 12.6 For the retaining wall, H = 8 m, h' = 36°, a = 10°, 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°. Calculate the Rankine active force per unit length of the wall after the occurrence of the tensile crack. YI H Groundwater table H Figure P12.2arrow_forward
- Q2 A smooth backed wall is 6m height and retain a soil with the properties shown in the Figure below. If the soil surface carries a uniform distribution pressure of 50 kN/m*. Determine the total Rankine active stresses on the wall and its positions. q-50 kN/m? Sand y= 20 kN/m Ø' = 20°arrow_forwardProb. 1, 2, 3. 13.13 through 13.15 A retaining wall is shown in Figure 13.37. For each problem, determine the Rankine active force, P.r per unit length of the wall and the location of the resultant. Problem H H, Y2 o' (deg) o' (deg) 13.13 4.3 m 2.1 m 16.2 kN/m 19.9 kN/m³ 28 28 19.1 kN/m 12 kN/m? 21 kN/m² 13.14 7.3 m 3 m 18 kN/m? 32 32 13.15 9 m 16.5 kN/m 20.2 kN/m³ 4 m 30 34 Surcharge = q Sand cj = 0 Groundwater table H Sand Y2 (saturated unit weight) cz = 0 Frictionless wall Figure 13.37 Cengage Learning 2014 © Cengage Leaming 2014arrow_forwardA vertical retaining wall 6m high is supporting a horizontal backfill having a weight of 16.5 kN/m^3 and a saturated unit weight of 19 kN/m^3. Angle of friction of the backfill is 30°. Ground water table is located 3m below ground surface. A.Determinw thw total active force acting on the wallarrow_forward
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