Principles of Foundation Engineering (MindTap Course List)
8th Edition
ISBN: 9781305081550
Author: Braja M. Das
Publisher: Cengage Learning
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Chapter 14, Problem 14.2P
Redo Problem 14.1 with the following: L1 = 3m, L2 = 6 m, γ = 17.3 kN/m3, γsat = 19.4 kN/m3, and ϕ′ = 30°.
14.1 Figure P14.1 shows a cantilever sheet-pile wall penetrating a granular soil. Here, L1 = 4 m, L2 = 8 m, γ = 16.1 kN/m3, γsat = 18.2 kN/m3, and ϕ′ = 32°.
- a. What is the theoretical depth of embedment, D?
- b. For a 30% increase in D, what should be the total length of the sheet piles?
- c. Determine the theoretical maximum moment of the sheet pile.
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A 600mm diameter pile is embedded in 3 layers of dense sand at a depth of 17m. Nq = 86. The groundwater table is situated between Layers 2 and 3.
The layers have the following properties:
Layer 1: γ = 16.9 kN/m3. 3m thick.
Layer 2: γ = 17.6 kN/m3. 5.5m thick.
Layer 3: γsat = 19.65 kN/m3.
K is 0.9 and tan α = 0.37. The factor of safety is 3.0.
What is the skin friction resistance of the pile in kN?
What is the skin friction resistance of the pile in kN?
None of the choices
1684.170
1477.156
1257.150
1322.744
866.118
Please answer this asap. For upvote. Thank you very much
A 600mm diameter pile is embedded in 3 layers of dense sand at a depth of 17m. Nq = 86. The groundwater table is situated between Layers 2 and 3.
The layers have the following properties:
Layer 1: γ = 16.9 kN/m3. 3m thick.
Layer 2: γ = 17.6 kN/m3. 5.5m thick.
Layer 3: γsat = 19.65 kN/m3.
K is 0.9 and tan α = 0.37. The factor of safety is 3.0.
What is the skin friction resistance of the pile in kN?
None of the choices
1684.170
1477.156
1257.150
1322.744
866.118
Please answer this asap. For upvote. Thank you vey much.
3.7 An embankment is shown in Figure P3.2. Given that B = 5m, H = 5m, m=
1.5, z = 3m, a= 3m, b = 4m, and y= 18kN/m³, determine the vertical stresses
at A, B, C, D, and E.
I
Figure P3.2
B/2 8:2
NA
S
121
Unit weight of soil
embankment - Y
ak
B C D b
E
Chapter 14 Solutions
Principles of Foundation Engineering (MindTap Course List)
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- 9, = 10 kPa I EFine-grained soil Y= 17.2 kN/m, S = 0.8. = 27°, s = 55 kPa 1.5 m 1.0 m 8 = determine the depth of embedment of the cantilever sheet pile wall shown above.arrow_forwardQuestion 2. In Figure 2, let L1 = 4 m, L2 = 5 m, and l = 2 m. Also, let y = 17 kN/m³, Ysat = 20 kN/m³, o' = 35°, and c = 30 kN/m². (i) Determine the theoretical depth of embedment of the sheet-pile wall. (ii) Calculate the anchor force per unit length of the wall. (iii) If L1 = 2 m, L2 = 7 m and other parameters remain the same, what will happen to the theoretical depth of embedment and anchor force? Explain. (iv) If L1 = 5 m, L2 = 4 m and other parameters remain the same, what will happen to the theoretical depth of embedment and anchor force? Explain. A L, o Water level Sand, y, ' Sand Dredge line D Clay Clay Yat = 0 Figure 2. Sheet-pile-wallarrow_forwardIf in Figure 8.19 B₁ = 5.0 m, B₂=3.0 m, H = 4 m, z = 3 m, and the embankment applies a force of 137 kN/m2, the stress increase experienced 3 m (z = 3 m) below the bottom right corner point of the figure is, B₂- ** FIGURE 8.19 Embankment loading 105.58 kN/m² 62.34 kN/m² Ⓒ 150.78 kN/m² Ⓒ224.88 kN/m² -9-ylarrow_forward
- Problem #1 The figure below shows a cantilever sheet-pile wall penetrating a granular soil. Here, L₁ = 4 m, L₂ = 8 m, unit weight above water table= 16.1 kN/m³, saturated unit weight = 5 18.2 kN/m³, and friction angle of sand = 32 degrees. a. What is the theoretical depth of embedment, D? b. For a 30% increase in D, what should be the total length of the sheet piles? c. Determine the theoretical maximum moment of the sheet pile. d. If the allowable flexural stress = 170 MPa, compute the required section modulus of the sheet pile. Water table Dredge line Sand Y <=0 Sand Ysat c'=0 Sand Ysat c'=0arrow_forwardProblem #1 The figure below shows a cantilever sheet-pile wall penetrating a granular soil. Here, L1 = 4 m, L2 = 8 m, unit weight above water table= 16.1 kN/m3, saturated unit weight = 5 18.2 kN/m3, and friction angle of sand = 32 degrees. a. What is the theoretical depth of embedment, D? b. For a 30% increase in D, what should be the total length of the sheet piles? c. Determine the theoretical maximum moment of the sheet pile. d. If the allowable flexural stress = 170 MPa, compute the required section modulus of the sheet pile.arrow_forward2. Assuming a sheet pile wall is constructed to retain 12.5m of soil, as shown in Figure 2, and the water is 2m above the bottom of wall, compute the resultant lateral force acting on the upper12.5m of the sheet- pile wall. Assume a surcharge load of 6.7kN/m2 and consider tension cracks in your calculation. 5m Sandy clay c=25KN/m², =10°, y=18KN/m³ 7.5m Silt c=10KN/m², 0=15°, y=20KN/m³ Sand =35°, y=19KN/m³ Figure 2arrow_forward
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- Question 2 Refer to the braced cut shown in Figure Q2, for which y = 17.6 kN/m², 6' = 32°, and c’ = 0. The struts are located 4 m on center-to-center in the plan. Draw the earth-pressure envelope and determine the strut loads at levels A, B, and C. Determine also: a. The sheet-pile section modulus, assume that Gan =170 x 10³ kN/m? b. The required section modulus of the wales at level A; assume that Gan = 173 x 10º kN/m² -5 m- 2 m A 3 m В c = 0 3 m C 1 marrow_forwardUsing ₁ = 0 analysis and assuming planar failure as shown, the minimum factor of safety against shear failure of a vertical cut of height 4 m in a pure clay having C₁ = 120 kN/m2 and Ysat Y sat = 20 kN/m³ is 77XXX77XXX Potential failure plane 4 m →arrow_forwardA long trench is excavated in medium dense sand for the foundation of a multistory building. The side of the trench are supported with sheet piles fixed in place by struts and wales as shown in the figure. Wales are braced at every 4m center to center. Determine the structs from A-C. 1.5ml Sand 2.5m y = 17kN/m³ - = 35° 8m 2.5m 1.5m A B Carrow_forward
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