Principles of Foundation Engineering (MindTap Course List)
9th Edition
ISBN: 9781337705028
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
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Chapter 18, Problem 18.3P
To determine
Find the required actual depth of the sheet pile.
Select suitable section of sheet pile.
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Students have asked these similar questions
A 5 m wide braced excavation is made in a saturated clay, as shown
in Figure P19.1, with the following properties: c =20 kN/m?, 4= 0,
and y = 18.5 kN/m³. The struts are spaced at 5 m center to center in
plan.
a. Determine the strut forces.
b. Determine the section modulus of the sheet pile required,
assuming oall = 170 MN/m².
c. Determine the maximum moment for the wales at levels B
and C.
5 m
A
1 m
| 3 m
B
| 2 m
Im
Question 3
A new underground tunnel section is designed by a geotechnical consultant. For the
underground station a 5 m wide braced excavation is made in a saturated clay as shown in
Figure Q3 with unit weight, y = 18.5 kN/m², friction angle, o = 0° and cohesion, c = 20
kN/m?. The struts are spaced at 5 m center to center in plan. Refer Appendix 1 to select
the sheet-pile section.
i. Draw the strut forces.
ii. Determine the section modulus of the sheet pile needed. Assume oall = 170 MN/m?
iii. Determine the maximum moment for the wales at levels B and C.
Show a complete answer, including all numerical values and necessary diagrams.
5 m
3 m
B
2 m
Figure below shows the cross-section of an excavation which is to be made alongside a
river. Write down an expression for the effective stress at level A-A and use this to establish the depth H to
which the water in the trench can be reduced before instability occurs (when o'z is zero). The shear
resistance at the clay and sheet pile interface can be considered negligible.
sheet piling
River
peaty silt
3.5 m
dredge level
8 m
. alluvial
silty clay
6.0 m
(y 18 kN/m³)
3 m
coarse
3.5 m
gravel
impervious red marl
Chapter 18 Solutions
Principles of Foundation Engineering (MindTap Course List)
Ch. 18 - Refer to Figure 18.9. A cantilever sheet pile is...Ch. 18 - Prob. 18.2PCh. 18 - Prob. 18.3PCh. 18 - Refer to Figure 18.13. Given L1 = 1.5 m, L2 = 3 m;...Ch. 18 - In Problem 18.4, find the maximum bending moment...Ch. 18 - Prob. 18.6PCh. 18 - Prob. 18.7PCh. 18 - Prob. 18.8PCh. 18 - Refer to Figure 18.23. Given L1=3m, L2=6m,...Ch. 18 - Prob. 18.10P
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- I am looking for the solution for question 9.5, thank youarrow_forwardI am asking for 9.2 to 9.6, thank youarrow_forward2. Design the anchored sheet pile wall supporting a loose sand fill as shown in the following Figure. GWT is at the same height on both sides, and assume yw=10kN/m³. Based on the log spiral solutions, the Ka for the loose sand is 0.3 while the Ka and Kp for the dense sand are 0.2 and 13.125, respectively. Using the free earth support method, do the following: a) For a factor of safety of 2 on the passive resistance, determine the required depth of penetration depth, D. (initial trial with D'=1.5m) b) Determine the bending moment and the anchor load. c) Select a sheet pile section from the Table 9.1 (E=210x10³ MN/m² and fair-210 MN/m²) kN/m² D 7.0m. Yt = 16.5 kN/m³ o'= 30° Loose sand fill: Yt 19.5 kN/m3 o' = = 30° Dense sand: Yt = 21 kN/m³ $' = 40° q=10 1.5m. 0.5m. Tarrow_forward
- Figure 15.53 below shows a cantilever sheet pile driven into a granular soil where the water table is 2 m below the top of the sand. The properties of thesand are: ' = 40, m = 17.5 kN/m3, and sat = 19 kN/m3. It is proposed toexcavate to a depth of 6 m below the ground level. Determine the depth towhich the sheet pile mast be driven, using the net lateral pressure diagram. Fig. 15.53arrow_forwardi need the answer quicklyarrow_forwardIn Problem 14.6, assume that Dactual = 1.3 Dtheory.a. Determine the theoretical maximum moment.b. Using Rowe’s moment reduction technique, choose a sheet-pile section. Take E = 210 x 103 MN/m2 and σall = 210,000 kN/m2.arrow_forward
- i need the answer quicklyarrow_forward15.21 A cantilever sheet pile wall is required to temporarily support an embankment for an access road, as shown in Figure P15.21. Determine the depth of penetration of the wall into the silty clay soil and the maximum bend- ing moment. Select two methods from FMM, FSM, and NPPM, and compare the results. Groundwater is 10 m below the surface. 20 кра 2.5 m Coarse-grained soil % 27,17 kN/m² = Medium clay 719 kN/m³ %= 50 kPa =27° FIGURE P15.21arrow_forwardA 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 mucharrow_forward
- 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 allowable axial load capacity of the pile in kN? 5476.785 1750.169 1127.606 2439.011 None of the choices 2365.846 Please answer this asap. For upvote. Thank you very mucharrow_forwardA 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.arrow_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_forward
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