X XXXL4mX5m6 mKey:PILEISoil 1c = 35 kPaY = 16.79 kN/m³Soil 2GROUNDLEVELc = 45 kPaY = 18.76 kN/m³Soil 3c = 55 kPaY = 19.71 kN/m²Soil 4c = 60 kPaY = 20.72 kN/m³Question:Estimate the pile length required to carry the 900 kN axial load for the pile-soil system shown inthe figure above.

Soil profile:Soil 1:C= 35 kPaSoil 2:C= 45 kPaSoil 3:C= 55 kPaSoil 4:C= 60 kPa

X XXXX 4m 5m 6 m XX Key: PILE I Soil 1 c = 35 kPa Y = 16.79 kN/m³ Soil 2 GROUND LEVEL Soil 3 c = 45 kPa Y = 18.76 kN/m² XXXXXX Soil 4 c = 55 kPa Y = 19.71 kN/m² c = 60 kPa Y=20.72 kN/m² Question: Estimate the pile length required to carry the 900 kN axial load for the pile-soil system shown in the figure above.

X XXXX 4m 5m 6 m XX Key: PILE I Soil 1 c = 35 kPa Y = 16.79 kN/m³ Soil 2 GROUND LEVEL Soil 3 c = 45 kPa Y = 18.76 kN/m² XXXXXX Soil 4 c = 55 kPa Y = 19.71 kN/m² c = 60 kPa Y=20.72 kN/m² Question: Estimate the pile length required to carry the 900 kN axial load for the pile-soil system shown in the figure above.

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter18: Pile Foundation

Section: Chapter Questions

Problem 18.10P

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Solve Problem 12.23 using the method of Broms. Assume that the pile is flexible and free headed. Let the soil unit weight, = 16 kN/m3; the soil friction angle, = 30; and the yield stress of the pile material. FY = 21 MN/m2. 12.23 A 30 m long concrete pile is 305 mm 305 mm in cross section and is fully embedded in a sand dcposit. If nh = 9200 kN/m2, the moment at ground level Mg = 0, the allowable displacement of pile head = 12 mm; Ep = 21 106 kN/m2, and FY(pile) = 21,000 kN/m2, calculate the allowable lateral load, Qg, at the ground level. Use the elastic solution method.
A driven closed-ended pile, circular in cross section, is shown in Figure P12.7. Calculate the following. The ultimate point load using Meyerhof’s procedure. The ultimate point load using Vesic’s procedure. Take Irr = 50. An approximate ultimate point load on the basis of parts (a) and (b). The ultimate frictional resistance Qs. [Use Eqs. (12.42) through (12.44), and take K = 1.4 and δ′ = 0.6ϕ′.] The allowable load of the pile (use FS = 4).
A steel pile (H-section; HP 360 1.491; see Table 18.1) is driven into a layer of sandstone The length of the pile is 18.9 m. Following are the properties of the sandstone: Unconfined compression strength = qu(lab) = 78.7 MN/m2 Angle of friction = 36 Using a factor of safety of 3, estimate the allowable point load that can be carried by the pile. Use Eq. (18.42).
Redo Problem 18.10 using the method for estimating the skin resistance. 18.10 A concrete pile 15 m long with a cross section of 380 mm 380 mm is fully embedded in a saturated clay layer. For the clay, sat = 18 kN/m3, = 0, and cu = 80 kN/m2. Assume that the water table lies below the tip of the pile. Determine the allowable load that the pile can carry (FS = 3). Use the a method to estimate the skin resistance.
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17) The friction load capacity of the pile using the B-method is most nearly: a. 437 kN b. 927 kN c. 644 KN d. 1100 kN 15 m a. 177 kN b. 345 kN c. 441 kN d. 184 kN Groundwater table 381 mm NC Clay Yar 17 kN/m³ c²-0 kPa $-30° 23 t Sand Ysa 19.2 kN/m³ 18) In the previous question, the tip end-bearing load capacity of the pile using the B- method is most nearly: -28 e'=0 Tp2/3
FDE 014: The pile group shown consists of 12 piles, each 0.36m in diameter arranged 3 x 4 matrix. The pile penetrates a soft clay (L₁ = 3m, Cu1 = 56kPa), a medium dense clay (L2 = 5m, cu2 = 78kPa), and a stiff clay (L3= 4m, Cu3 - 95kPa). Assume Nc-9 and use á- 1 for soft and medium dense clay, á-0.5 for stiff clay. FS = 3. 1⁹ 0.8m 0.8m 0.3m Compute the safe center-to-center spacing of the piles for 100% efficiency. Select the correct response: 175 mm 251 mm 197 mm 138 mm 0.8 m 3.8
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Redo Problem 12.3 using Coyle and Castellos methods for estimating both Qp and Qs. 12.3 A 500 mm diameter and 20 m long concrete pile is driven into a sand where = 18.5 kN/m3 and = 32. Assuming = 0.7 and K = 1.5 Ko, determine the load-carrying capacity of the pile, with a factor of safety of 3. Use Meyerhofs method [Eq. (12.18)] for computing the point load-carrying capacity Qp, and Eqs. (12.42) and (12.43) for computing the load-carrying capacity of the pile shaft Qs.
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A 400 mm 400 mm square precast concrete pile of 15 m length is driven into a sand where = 18.0 kN/m3 and = 33. Assuming = 0.7 and K = 1.4Ko, determine the load carrying capacity of the pile with factor of safety of 3.0.