Fundamentals of Geotechnical Engineering (MindTap Course List)
5th Edition
ISBN: 9781305635180
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
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Chapter 18, Problem 18.9P
Determine the maximum load that can be allowed on a 500 mm diameter and 18 m long pile driven into a clay where γ = 20.0 kN/m3 and cu = 60 kN/m2. Use the a method for determining the skin friction. Allow a factor of safety of 3. What percentage of the ultimate load is being carried by the pile shaft?
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A concrete pile, 350 mm square, is driven into a thick deposit of medium sand with φ= 35° and ϒ = 19kn/m3. The water table lies at 2.0 m below ground level. Estimate the length of pile required to support a working load of 450 KN assuming a an overall factor of safety of 2.5.
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Please round to the nearest Hundredth (i.e., 0.01). No Comma!
A square pile, 21 m long is driven into a homogeneous sand layer. The pile's width (diameter) is 0.4m. The standard
penetration resistance near the vicinity of the pile is 12. Calculate the ultimate skin friction force (Qs) of the pile. Use
Briaud & Tucker method. Hint: Qs = fs x As
Qs =
kN
PLEASE ANSWER CLEARLY SHOWING ALL EQUATIONS AND WORK PLEASE.
A 18-m-long pile (400mm by 400mm) extends through loose soil (γ = 16 kN/m3) to dense sand with γ = 18 kN/m3 and φ' of 37°. Estimate the ultimate pile point load (kN) with Meyerhof's method.
Chapter 18 Solutions
Fundamentals of Geotechnical Engineering (MindTap Course List)
Ch. 18 - State whether the following are true or false. a....Ch. 18 - A 1500 kN load was applied on two 20 m long and...Ch. 18 - A 500 mm diameter and 20 m long concrete pile is...Ch. 18 - A 400-mm diameter and 15 m long concrete pile is...Ch. 18 - A 400 mm 400 mm square precast concrete pile of...Ch. 18 - Prob. 18.6PCh. 18 - Prob. 18.7PCh. 18 - Prob. 18.8PCh. 18 - Determine the maximum load that can be allowed on...Ch. 18 - Prob. 18.10P
Ch. 18 - Redo Problem 18.10 using the method for...Ch. 18 - Determine the maximum load that can be allowed on...Ch. 18 - Prob. 18.13PCh. 18 - A steel pile (H-section; HP 360 1.491; see Table...Ch. 18 - A concrete pile is 18 m long and has a cross...Ch. 18 - Prob. 18.16PCh. 18 - Prob. 18.17PCh. 18 - Prob. 18.18PCh. 18 - Prob. 18.19PCh. 18 - Figure 18.26a shows a pile. Let L = 20 m, D = 450...Ch. 18 - Refer to Figure 18.26b. Let L = 15.24 m, fill =...Ch. 18 - Prob. 18.22PCh. 18 - Figure 18.39 shows a 3 5 pile group consisting of...Ch. 18 - The section of a 4 4 group pile in a layered...Ch. 18 - Prob. 18.25PCh. 18 - Prob. 18.26CTP
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- (a) Determine the allowable load-carrying capacity of the bored concrete pile for: embedded length = 8 m, and embedded length = 11 m. Take the diameter of the pile as 0.5m. (Answer Qall = 357 kN @8m and 573 kN @11m for FS = 3). FS The factor of safety generally used ranges from 2.5 to 4, depending on the uncertainties surrounding the calculation of ultimate load. Depth (m) v = 20 kN/m3 p' = 30° Ks = 1.0 Loose granular fill y = 21 kN/m3 p' = 35° Ks = 2.0 Dense gravel 7 v = 20 kN/m3 cu at 7.0 m = 120 kPa cu at 8.0 m = 145 kPa Glacial clay cu at 11.0 m = 220 kPa, adhesion factor, a = 0.6, Nc = 9 11arrow_forwardA square precast concrete pile of sides 0.40 m is to be driven 12 m into the soil strata as shown. Determine the frictional resistance of the pile using β method. Assume β = 0.265arrow_forwardA circular pile is to be driven upto a depth of 10 m at a construction site. The average surface area of the pile is 2 m2 per meter length. The soil at the site is homogeneous sand, having effective friction angle of 30°. The ground water table (GWT) is at a depth of 4 m below the ground surface. The unit weights of the soil above and below the GWT are 18 kN/m3 and 20 kN/m3 respectively. Takek = 0.9 and the angle of wall friction (6) = 28°. The total axial frictional resistance mobilized on the pile against the driving is %3D kN. (Y = 9.81 kN/m³) %3Darrow_forward
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- A square pile (B=0.3m) is installed in a silty sand with a friction angle of approximately 28 andno cohesion. The soil is saturated, with a unit weight of 19 kN/m3. Pile length is 15m. Determinethe ultimate load capacity of the pile for the current soil conditions. Use all methods availableand get the best estimate. Estimate the elastic settlement of the pile, assuming a FS = 3. Use Ep= 21 x 106 kN/m2; Es = 20 x 103 kN/m2; µs = 0.35 and ξ = 0.67.arrow_forwardA concrete pile 50 ft long having a cross section of 15 in. x 15 in. is fully embedded in a saturated clay layer for which γsat = 121 lb/ft3, Φ = 0, and cu = 1600 lb/ft2. Determine the allowable load that the pile can carry. (Let FS = 3.) Use the a method Eq. (9.59) and Table 9.10 to estimate the skin friction and Vesic’s method for point load estimation.arrow_forwardA concrete pile 500 mm by 500 mm square cross section is embedded in a saturated clay. The length of the embedment is 16m. The undrained cohesion, Cu of clay is 40 kN/m?, and the unit weight of the clay is 20 kN/m². Use a factor of safety of 5 to determine the allowable load the pile can carry. d.arrow_forward
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