Fundamentals of Geotechnical Engineering (MindTap Course List)
5th Edition
ISBN: 9781305635180
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
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Question
Chapter 15, Problem 15.11P
To determine
Find the factors of safety with respect to overturning and sliding.
Check whether the eccentricity is within the limit.
Find the soil pressures at the toe and the heel.
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The cross section of a proposed concrete retaining wall is shown in Figure 4. The unit weight of the concrete being 24kN/m3. The soil carries a uniformly distributed load of 40kN/m2 at the top. Given c=0, f=32°, gsoil=17.5kN/m3 and µ=0.5.
From the data:
Check the stability of the retaining wall against sliding and overturning
Determine the maximum and minimum pressure under the retaining wall.
For the dam retaining water as shown, find (A) the factor of safety against sliding if µ=0.48,
(B) the factor of safety against overturning and (C) the stress intensity at the base of the
dam. The foundation soil is permeable; assume hydrostatic uplift varies from full
hydrostatic head at the heel of the dam to zero at the toe. Use unit weight of concrete
equal to 23.5kN/m?.
3 m
4 m
8 m
3 m
to
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12 m
14 m
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O O
1. Determine the force F per metre width (into the page) of the rectangular prismatic
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Chapter 15 Solutions
Fundamentals of Geotechnical Engineering (MindTap Course List)
Ch. 15 - Prob. 15.1PCh. 15 - Prob. 15.2PCh. 15 - Prob. 15.3PCh. 15 - Prob. 15.4PCh. 15 - Prob. 15.5PCh. 15 - Prob. 15.6PCh. 15 - Prob. 15.7PCh. 15 - Prob. 15.8PCh. 15 - Prob. 15.9PCh. 15 - Prob. 15.10P
Ch. 15 - Prob. 15.11PCh. 15 - Prob. 15.12PCh. 15 - Prob. 15.13PCh. 15 - Prob. 15.14PCh. 15 - Prob. 15.15PCh. 15 - Refer to the braced cut in Figure 15.50, for which...Ch. 15 - For the braced cut described in Problem 15.16,...Ch. 15 - Refer to Figure 15.51 in which = 17.5 kN/m3, c =...Ch. 15 - Refer to Figure 15.27a. For the braced cut, H = 6...Ch. 15 - Prob. 15.20PCh. 15 - Determine the factor of safety against bottom...Ch. 15 - Prob. 15.22PCh. 15 - The water table at a site is at 5 m below the...Ch. 15 - Prob. 15.24PCh. 15 - Prob. 15.25CTPCh. 15 - Figure 15.53 below shows a cantilever sheet pile...
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- A concrete retaining wall 8 m high is supporting a horizontal backfill having a dry unit weight of 16.25kN/m3. The cohesionless soil has an angle of internal friction of 33 degrees and a void ratio 0f 0.65. (Use four decimal places) A. Compute the rankine active force on the wall. B. Compute the rankine active force on the wall if water logging occurs at a depth of 3.5 from the ground surface. C. Compute the location of the resultant active force from the bottom.arrow_forwardI need detailed explanation solving this exercise from Foundation Engineering, step by step please.arrow_forward7. Water is acting on the vertical side of a trapezoidal masonry dam 2m wide at the top, 15m wide at the bottom and 20m high. If the allowable compressive stress at the toe is 345kPa and neglecting the hydrostatic uplift. Compute the depth of water. Assume the unit weight of concrete=23.50kN/m³ a. 19.76 b. 18.92 c. 17.43 d. 13.54 8. From the previous problem, compute the Factor of safety against overturming. a. 3.142 b. 4.578 с. 3.579 d. 9.766 9. From problem #7, compute the factor of safety against sliding. Use the p=0.60 a. 1.609 b. 2.666 c. 1.365 d. 1.252arrow_forward
- Question 1: The cross-section of a cantilever retaining wall is shown below. Calculate the factor of safety with regards to overturning, sliding and bearing capacity (Use Rankine). Use Yeonerete = 23.58 kN/m³ and k, =k, = 2/3 F10 0.5 m H =0.458 m Yi = 18 kN/m³ di=30° cj=0 H2=6 m 10 1.5 m = D 0.7 m H3=0.7 m C + 0.7 m + 0.7 m →l+- 2.6 m 9 kN/m³ d'½=20° cz=40 kN/m²arrow_forwardANSWER SHOULD BE ANSWER KEY: 43) 14.2 MPa 44) 90 mm 45) 0.33 MPaarrow_forwardH.W 2: _Find the collapse load (Wu) for the isotropic slab shown below by using yield line theory. Assume m* = m= 25 kN.m 6 m 4 m 3marrow_forward
- Q3) A retaining structure is given in figure. Calculate the factor of safety against sliding. (Ignore tensile crack behavior inside active part and ground water condition. Take 1.0 m interval step for point load calculation. k₁= k₂= 0.9). 3.B m 2.C m Yn: 20.0 kN/m² D: 2Eº c: 30 kN/m² 0.5 m 0.5 m 1 3.0 m 5.0 m Y cone ➜ 5A0 KN Yn: 18.5 kN/m³ c: 18 kN/m² $: ID º 24.0 kN/m³arrow_forwardI need an answer to the factor of safety again overturning.arrow_forwardAnalyze the stability of the reinforced cantilever retaining wall based on the three failure modes; : Sliding : Overturning : Bearing Stress 1. Unit weight of soil Ys = 18.5 kN/m³ 2. Unit weight of Conc Yc = 24 kN/m³ 3. Internal friction angle = 30° 4. Coefficient of friction between soil and concrete bass M = 0.35 %3D 5. Bearing capacity of soil = 150 kN/m2 o 45m Soon 3. 0145m 2.amarrow_forward
- I need detailed explanation solving this exercise from Foundation Engineering, step by step please.arrow_forwardSolve in 20 minutes..1 will upvotearrow_forwardQ5: 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 Luckarrow_forward
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