Principles of Foundation Engineering (MindTap Course List)
9th Edition
ISBN: 9781337705028
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Question
thumb_up100%
Chapter 17, Problem 17.7P
a.
To determine
Calculate the required thickness of ties
b.
To determine
Find the maximum length of the tie
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
3. Compute the resultant lateral force for the soil-wall system shown
in Figure 3. You may ignore tensile cracks. Use
• A- Coloumb
• B - Rankine
0=30°, y=20kN/m³
4m
Ground water table
7m
c=50KN/m², p=10°, y=18KN/m³
0=25°, y=20KN/m³
8 m
Gravity wall
Figure 3
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 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
Chapter 17 Solutions
Principles of Foundation Engineering (MindTap Course List)
Knowledge Booster
Similar questions
- A reinforced concrete retaining wall is proportioned as shown below. There is a water table located H1m beneath the ground surface. Use ultimate bearing capacity of 450 kPa. Based on the figure, the dimensions are given below. Use γc = 23.48 kN/m3 wall thickness = 0.47m footing thickness = 0.53m toe slab length = 2.33m heel slab length = 4.38m ground water table depth = 2.99 H2 = 3.84 The following values were calculated for this particular retaining wall: Righting moment: 3,868 kN-m/m Overturning moment: 908 kN-m/m Total vertical load: 999 kN/m What is the factor of safety for bearing pressure? Please answer this asap for upvote. Thanks in advancearrow_forwardA reinforced concrete retaining wall is proportioned as shown below. There is a water table located H1m beneath the ground surface. Use ultimate bearing capacity of 450 kPa. Based on the figure, the dimensions are given below. Use γc = 24.67 kN/m3 wall thickness = 0.65m footing thickness = 0.55m toe slab length = 2.47m heel slab length = 3.78m ground water table depth = 3.25 H2 = 3.92 The soil parameters are also given below. Take note that there is just one type of soil present here. Bulk unit weight = 16.93 Submerged unit weight = 9.67 Angle of internal friction = 21 If you add the factors of safety for sliding and overturning, what is the sum? Consider friction coefficient μ = 0.77 Please answer this asap. For upvote. Thank you very mucharrow_forwardA 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.arrow_forward
- (g) Find the stability of a retaining wall for the following data. (i) Height of Earth retained with level top without surcharge from road level = 3.60m Length of Toe slab = 1.10 m Length of Hill Slab= 3.00 m Total length of Hill Slab= 4.50m Depth of Foundation from road =1.20 (vi) Height of Stem Slab from base to top =4.40m. (vii) Thickness of stem slab at base and that at top=0.40m (viii) Depth of base slab at edge and that at junction of base slab and stem slab= 0.40m (ii) (iii) (iv) Unit weight of backfill= 18 kN/cum Unit weight of R.C.C. = 24 kN/cum (xi) Angle of Repose of Back fill= 30 Degree (xii) Coefficient of friction between wall and soil = 0.60 (xiii) Net safe bearing pressure= 100 kN/m2 (ix)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_forwardThe cross section of a cantilever retaining wall is given below. Based on the given soil properties and wall geometry: (x = 23.5 kN/m³). Wall dimensions: H = 5 m, X₁ = 0.3 m, X₂=0.80 m, X3 = 1.25 m, X4 = 2 m, X5 = 0.55 m, D = 1 m Soil properties: y = 17 kN/m³, Ø₁ = 29°, 72= 18 kN/m³, 0₂ = 22°, c₂ = 30 kN/m² www Xs |—×3 →|· 1. Calculate the factor of safety with respect to: A. Overturning about the toe? Use a table to calculate the materials and moments. B. Sliding about the base of the footing? Use kl=k2= H FUSarrow_forward
- 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_forwardFor the cantilever retaining wall shown, if the F.O.S. (Overturning)= F.O.S. (Sliding), find: 1. The width B 2. Least value of Ø to make the wall stable against sliding om INT deperst. B "S=f(Ø)* 5 of=34 kN/m + Yeone: = 24," Sand: 8=17 S=0 Clay! Øn = Cu = 63.75 HO / kN/m²arrow_forward(g) Find the stability of a retainıng wall for the following data. (i) Height of Earth retained with level top without surcharge from road level = 3.60m (ii) Length of Toe slab = 1.10 m (iii) Length of Hill Slab= 3.00 m (iv) Total length of Hill Slab= 4.50m (v) Depth of Foundation from road =1.20 (vi) Height of Stem Slab from base to top =4.40m. (vii) Thickness of stem slab at base and that at top=D0.40m (viii) Depth of base slab at edge and that at junction of base slab and stem slab= 0.40m (ix) Unit weight of backfill= 18 kN/cum (x) Unit weight of R.C.C. = 24 kN/cum %3D (xi) Angle of Repose of Back fill= 30 Degree (xii) Coefficient of friction between wall and soil = 0.60 (xiii) Net safe bearing pressure= 100 kN/m2arrow_forward
- For the cantilever retaining wall shown in Figure P13.1, let the following data be given: Wall dimensions: H = 8m x₁ = 0.40m x₂ = 0.60m Soil properties: Y₁ = 16.80kN/m³ Y2 = 17.60kN/m³ c=0 x3 = 1.50m x₁ = 3.50m x = 0.96m $₁ = 32° $½ = = 28° Figure P13.1 a. Calculate the factor of safety with respect to overturning. b. Calculate the factor of safety with respect to sliding. c. The magnitude of the pressure on the base at the toe. d. The magnitude of the pressure on the base at the heel. D = 1.75m a = 10° C₂' = 30kN/m² Use the Yconcrete = 23.58kN/m³. Also, use k₁=k₂ = 2/3 which are the factor to calculate for p' and Ca-arrow_forward300 mm thick footing slab supports a 300 mm thick wall carrying uniform service dead load of 214.31 kN/m and service live load of 145.9 kN/m. The base of the wall footing slab is 1.2 m from the ground surface.Design parameters are as follows: γsoil = 16 kN/m3, γconc = 24 kN/m3, qa = 215.46 kPa, f’c = 27 MPa and fy = 420MPa. 1.Calculate the net allowable bearing capacity of soil in kPa. 2.Calculate the minimum required width of the wall footing slab. 3 Calculate the maximum ultimate moment (kNm) in the slab if the width of footing slab is 2.1 m 4 Calculate the required center to center spacing of 16 mm bars for flexure if the maximum factored moment in thr slab is 75 kN-m 5 Calculate the ultimate beam shear stress on the footing slab if the footing slab is 2.1 m wide.arrow_forwardThe cross section of a cantilever retaining wall is given below. Based on the given soil properties and wall geometry: ( Knowing that y, = 23.5 kN/m³ ) Wall dimensions: H = 7 m, X, = 0.55 m, X, = 0.75 m, X, = 1.2 m, X, = 2.1 m, X, = 0.7 m, D = 1 m Soil properties: Y, = 17 kN/m², , y,= 18 kN/m², , kN/m² ーュート 1. Calculate the factor of safety with respect to: A. Overturning about the toe? B. Sliding about the base of the footing? Use kl=k2= マ でarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Fundamentals of Geotechnical Engineering (MindTap...Civil EngineeringISBN:9781305635180Author:Braja M. Das, Nagaratnam SivakuganPublisher:Cengage Learning
Principles of Foundation Engineering (MindTap Cou...Civil EngineeringISBN:9781337705028Author:Braja M. Das, Nagaratnam SivakuganPublisher:Cengage Learning
Fundamentals of Geotechnical Engineering (MindTap...
Civil Engineering
ISBN:9781305635180
Author:Braja M. Das, Nagaratnam Sivakugan
Publisher:Cengage Learning
Principles of Foundation Engineering (MindTap Cou...
Civil Engineering
ISBN:9781337705028
Author:Braja M. Das, Nagaratnam Sivakugan
Publisher:Cengage Learning