1. The figure below shows the flow net for seepage of water around a single row of sheet piles driven into a permeable layer. Calculate the factor of safety against downstream heave, given than Ysat for the permeable layer = 17.7 kN/m³. (note: Thickness of permeable layer T = 18 m). H, 10 m 6 m -Sheet pile Heave zone Impermeable layer H₂-1.5 m Ysat 17.7 kN/m

1. The figure below shows the flow net for seepage of water around a single row of sheet piles driven into a permeable layer. Calculate the factor of safety against downstream heave, given than Ysat for the permeable layer = 17.7 kN/m³. (note: Thickness of permeable layer T = 18 m). H, 10 m 6 m -Sheet pile Heave zone Impermeable layer H₂-1.5 m Ysat 17.7 kN/m

Principles of Foundation Engineering (MindTap Course List)

9th Edition

ISBN:9781337705028

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter18: Sheet-pile Walls

Section: Chapter Questions

Problem 18.2P

See similar textbooks

Similar questions

The flow net around a sheet pile wall is shown in the sketch. The properties of the soil are permeability coefficient = 0.09 m/day (isotropic), specific gravity = 2.70 and void ratio =0.85. The sheet pile wall and the bottom of the soil are impermeable. 10 m 1.5 m 3m 4.20 The factor of safety against the occurrence of piping failure is
The flow net around a sheet pile wall is shown in the sketch. The properties of the soil are permeability coefficient = 0.09 m/day (isotropic), specific gravity = 2.70 and void ratio = 0.85. The sheet pile wall and the bottom of the soil are impermeable. 10 m 1.5 m 3m The seepage loss (in m' per day per unit length of the wall) of water is
Refer to Figure 18.26b. Let L = 15.24 m, fill = 17.29 kN/m3, sat(clay) = 19.49 kN/m3, clay = 20, Hf = 3.05 m, and D = 0.406 m. The water table coincides with the top of the clay layer. Determine the total downward drag on the pile. Assume that = 0.6 clay. FIG. 18.26 Negative skin friction
The below figure shows a theoretical flow net for seepage around a sheet pile wall. The soil is isotropic with k = 1.78 ×10 m/s, γ = 17.7 kN/m (γ = 10 kN/m³). (a) Calculate the vertical effective stresses at points A and B. (b) If the water level on the right-hand side rises and becomes same as the lefthand side, calculate the vertical effective stresses at points A and B (assume water level on the left-hand side remains unchanged). (c) Compare the results obtained in (a) and (b). Provide your interpretation and justification.
A flow net for seepage under a sheet pile wall has n₁= 4, n=8 and the permeabilities of the soil in the horizontal and vertical directions are: K₁ = 8 x 10-¹5 m/sec and K₁=2x10-5 m/sec. If the head loss through the soil is 2 m, the quantity of seepage per meter length of the wall will be
Q-7 The following figure shows the flow net for seepage of water around a single row of sheet piles driven into a permeable layer. Calculate the factor of safety against downstream heave, given that ysat for the permeable layer = 17.7 kN/m3. (Note: Thickness of permeable layer T= 18 m) Sheet pile H1 = 10 m H, = 1.5 m 6 m Ysat = 17.7 kN/m³ Heave zone Impermeable layer
A rock storage pile is being designed for a mine in West Virginia. The pile is linedwith reinforced GCL overlain by a 1.5 mm thick HDPE geomembrane. A heavy nonwoven geotextile is placed on top of the geomembrane. Because the rock is porous(K = 10-2cm/s), it is used as the main LCS stone and no additional leachate collectionstone is being installed. Specify the base slope required to keep the head below 25cm if the design storm is 0.8 cm rain/day and the pipe-to-pipe lateral spacing is 60 mIs this rock a reasonable material to replace the LCS stone?
Draw a flow net for the single row of sheet piles driven into a permeable layer as shown in Figure below Given: H₁ = 3 m H₂ = 0.5m calculate the seepage loss per meter length of the sheet pile (at right angles to the cross section shown). H₁ 3 D = 1.5 m D₁ = 3.75 m D₁ -Sheet pile k= 4 x 10-4cm/sec Impermeable layer
For the sheet pile wall shown in figure below, find 1- Quantity of seepage (k= 0. 5 * 10-3 m/sec) 2- Pore water pressure at points A and B 3- Factor of safety against piping e = 0.75 m 3.0 m 1.5 m 4.5 m 3.0 m 6.0 m impermeabie stratum
The Figure below shows a long pile wall driven in sand with Coefficient of permeability K= 0.05cm/sec.it is required to: 1.Estimate the max. possible value of dimension h, where Ah=1.2. 2.Calculate the seepage loss (m /day) per meter of wall
Q: The following figure shows the flownet for seepage of water around a single row of sheet piles driven into permeable layer. Calculate the factor of safety against downstream heave, given that Ysat = 19 kN/m³ and yw = 9.81 kN/m³. All the relevant information are provided in the figure. HI-10m 6m ↓ Heave zone Sheet pile Impermeable layer H₂= 2 m Y-16 kN/m
Estimate the magnitude of k of the clay at a void ratio (e) of 0.9. Use Eq. (2.41). 2.10 Refer to Figure P 2.10 and use these values: • H = 7 m, • H, = 1.75 m, D = 7 m D = 3.5 m Draw a flow net. Calculate the seepage loss per meter length of the sheet pile (at a right angle to the cross section shown). Sheet pile H1 H2 D1 k= 6.5 x 10-4cm/sec Impermeable layer Figure P2.10 = 0.6. 2.11 A sand has the following: D10 = 0.2 mm, D = 0.4 mm, and void ratio e a. Determine the hydraulic conductivity using Eq. (2.38). b. Determine the hydraulic conductivity using Eq. (2.40).