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 L₁ Sand Y 0 Sand Ysat c²=0 Sand Ysat c'=0 $'

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 L₁ Sand Y 0 Sand Ysat c²=0 Sand Ysat c'=0 $'

Principles of Foundation Engineering (MindTap Course List)

8th Edition

ISBN:9781305081550

Author:Braja M. Das

Publisher:Braja M. Das

Chapter15: Braced Cuts

Section: Chapter Questions

Problem 15.6P

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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.
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.
12.37 Figure P 12.37 shows a group pile in clay. Determine the consolidation settlement of the group. Use the 2:1 method to estimate the average effective stress in the clay layers. 1335 KN K- 3 m ++ 3 m * 18 m 5 m 3 m ↓ 2.75 m X 2.75 m Group plan FIGURE P12.37 Groundwater table 15 m Rock Sand y = 15.72 kN/m² Sand Ysat = 18.55 kN/m³ Normally consolidated clay Ysat = 19.18 kN/m³ € = 0.8 C = 0.8 Normally consolidated clay Ysat = 18.08 kN/m³ % = 1.0 C = 0.31 Normally consolidated clay Ysat = 19.5 kN/m³ € = 0.7 C₂ = 0.26
Q2/ The load intensity applied by the footing (in the figure below)is 170 kN/m , determine the consolidation settlement for the following cases. (TW = 10 kN kN/m', o, = 64.35), divided the clay layer into three sub layers. m2 :1.0 m (1.5 x3.0) m Sand 1.5 m Y = 16.5 kN/m %3! Sand 1.5 m Ysat = 17.8 kN/m %3D Clay Ysat 18.2 kN/m e, = 0.92 Cc = 0.27 Cr 0.12 %3! 4.0 m
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
. Borings indicate that at a Staten Island, NY site, the top 6 meters is a 2) loose sand with a groundwater level at 3 meters below the ground surface. Below the sand is a 12 meter thick soft clay stratum. Assume sand unit weights are ymoist = 15 kN/cubic meter and ysat = 16 kN/cubic meter. Assume clay ysat = 20 kN/cubic meter. Calculate total, pore and effective stresses at 4, 13 and 18 meters deep.
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 much
1. Figure 3 shows a cantilever sheet pile wall, determine the: Sand 3 m y = 16 kN/m3 O' = 30 %3! Sand Ysat = 19 kN/m3 O' = 30 6 m Clay Ysat = 19 kN/m3 Cu = 54 kPa D %3D Figure 3 (a) Theoretical depth of embedment,
Q-1) A structure weighs (47000 kN including foundation) is to be constructed into the soil profile shown in Figure (1). Calculate: A. The final consolidation settlements below foundation center and edge. B. The time required for (20 mm) settlement to occur below foundation center. Fig.1 3 m 7m 2 m Sand Y=17 Clay 20 m diameter Y = 19 kN/m³ Y=20 kN/m³ c, = 0.1 m²/yr Cc = 0.33 eo=0.8 Impervious Rock V.T
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.
4) You are working for a construction company and are building a school. In digging the foundation, you find water at 7 m below the ground surface (bgs). One hundred meters away, you find water at 7.5 m bgs. Choose the datum as the confining layer that is at 25 m bgs. What is the piezometric surface at each point, the direction of groundwater flow, and the hydraulic gradient? Note: Assume the confining layer is parallel to the surface (this may or may not be true but assuming this allows us to simplify a complicated problem). Include a diagram in your solution. vni of al nomingizan listnicy Instancos ritiw 21uorl owl 2126l 16dt mot2 & Tab
For the soil element shown below, calculate: 1- Principle stresses action on the vertical plane. 2- Principle stresses action on the 0 plane, which inclines 20° clockwise from the (horizontal plane). 25 kPa -12.5 kPa -12.5 kPa 50 kPa -20° 50 kPa y -12.5 kPa -12.5 kPa 25 kPa X