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 15.12P
(a)
To determine
Find the required thickness of ties.
(b)
To determine
Find the required maximum length of ties.
Expert Solution & Answer
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Students have asked these similar questions
A reinforced-earth retaining wall is to be 10 m high. The following data are given:
y₁=16.0 kN/m³, ₁’=34°,
Y2=15.5 kN/m³, 2²=25°,
C₂ = 30 kN/m²
Backfill properties:
In-situ soil:
Reinforcement:
Vertical spacing, Sv=1 m,
Horizontal spacing, SH-1.25 m,
Width of reinforcement =120 mm,
(a)
In situ soil
72; 42; 02
fy=
= 260 MN/m², u²=25°,
Factor of safety against tie pullout and breaking = 3.0
Determine:
a) required thickness of ties
b) required maximum length of ties
c) factor of safety against overturning, and sliding.
ba
q/unit area
7
2= NSV
45 + ₁/2
Sv
Sy
-Sy
Sv
Sy
Sy
H
Sand
71
$₁
Question 2:
A gravity retaining wall is shown in figure below. Use ô'=2/3¢', and Coulomb's active earth
pressure theory.
Determine:
1. Factor of safety against overturning;
2. Factor of safety against sliding;
3. The pressure on the soil at the toe and heel.
Y = 18.5 kN/m³
4i = 32°
cj = 0
Use Yconcrete = 23.58 kN/m³
Note:
For Coulomb method, note that the weight 5 m
of the soil above the back face of the wall is
not taken into account in the resisting
5.7 m
P.
moment.
150
2.83 m -
----- Ph
75°
2.167 m
1.5 m
0.27 m 0.6 m
1.53 m
0.8 m
C'
Y2 = 18 kN/m³
$i = 24°
c = 30 kN/m²
0.8 m
0.3 m
- 3.5 m
%3D
A 360 mm thick footing slab supports a 300 mm thick wall carrying uniform service dead load of 283.7 kN/m and service live load of 145.6 kN/m. The base of
the wall footing slab is 1.1 m from the ground surface. Use 16 mm diameter for main bars. Design parameters are as follows: ysoil = 18 kN/m3, yconc = 24
kN/m3, qa = 215.8 kPa, fc = 27 MPa and fy = 414 MPa. Calculate the allowable nominal beam shear stress in MPa. Express your answer in 3 decimal places.
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 395 mm thick slab supports a 363 mm thick wall carrying uniform service dead load of 211.5 kN/m and service live load of 157.4 kN/m. The base of the wall footing slab is 1.4 m from the ground surface. Design parameters are as follows: Ysoil kN/m, Ycond = 24 kN/m³, q, = 207.92 kPa, f. 27 MPa and f, = 414 MPa. 16.5 Calculate the required center to center spacing of 16 mm bars for flexure. Note: Present the width (B) in multiples of 100 mm and present the exact required spacing in 2 decimal places (do not round off).arrow_forwardDesign a cantilever retaining wall shown in let the following data be given: Wall dimensions : H= 8 m, x1=0.4 m, x2=0.6 m, x3=1.5 m, x=3.5 m, X5=0.96 m, D = 1.75 m, a = 10° Soil properties : Y1 = 16.5 kN/m³, Q'r= 32°, y2 = 17.6 kN/m³, $'2= 28°, c'2=30 kN/m² Wall properties : Yconcrete = 23.58 kN/m³. Others : ki=k2= 2/3, Pp = 0 a) Calculate the factor of safety with respect to overturning, sliding, and bearing capacity. b) Is the design of the wall satisfactory with respect to the overturning, sliding, and bearing capacity limit states? Analyze your results referred to the Factor of Safety against overturning, FOSO > 2.5 and Factor of Safety against sliding, FOSS > 1.5. でarrow_forwardA reinforced earth retaining wall (Figure 13.27) is to be 10-m-high. Here,Backfill: unit weight, γ1 = 16 kN/m3 and soil friction angle, Φ'1 = 34ºReinforcement: vertical spacing, SV = 1 m; horizontal spacing, SH = 1.25 m;width of reinforcement = 120 mm., fy = 260 MN/m2; Φμ = 25º;factor of safety against tie pullout = 3; and factor of safetyagainst tie breaking = 3Determine:a. The required thickness of tiesb. The required maximum length of tiesarrow_forward
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