Си A concrete pile 20 m long having a cross section of 0.25 m x 0.25 m is fully embedded in a saturated clay layer. For the clay, given: Ysat = 18 kN/m³, = 0, and c₁ = 80 kN/m². Determine the allowable load that the pile can carry (FS-3). Use the A method to estimate the skin resistance. For L = 20 m, A = 0.173. (Enter your answer to three significant figures.) Qall kN

Си A concrete pile 20 m long having a cross section of 0.25 m x 0.25 m is fully embedded in a saturated clay layer. For the clay, given: Ysat = 18 kN/m³, = 0, and c₁ = 80 kN/m². Determine the allowable load that the pile can carry (FS-3). Use the A method to estimate the skin resistance. For L = 20 m, A = 0.173. (Enter your answer to three significant figures.) Qall kN

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 18.21P: Refer to Figure 18.26b. Let L = 15.24 m, fill = 17.29 kN/m3, sat(clay) = 19.49 kN/m3, clay = 20, Hf...

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A concrete pile 65 ft long having a cross section of 15 in. × 15 in. is fully embedded in a saturated clay layer for which Ysat = can carry. (Let FS = 3.) Use the a method equation QsfpAL = ac₂pAL and the following table to estimate the skin friction and Vesic's method for point load estimation. Си α Pa ≤ 0.1 1.00 0.2 0.3 0.92 0.82 0.4 0.74 0.6 0.62 0.8 0.54 1.0 0.48 1.2 0.42 1.4 0.40 1.6 0.38 1.8 0.36 2.0 0.35 2.4 0.34 2.8 0.34 Note: atmospheric pressure pa ≈ 100 kN/m² or 2000 lb/ft². (Enter your answer to three significant figures.) Qall = kip 121 lb/ft³, = 0, and Cu = 1600 lb/ft². Determine the allowable load that the pile
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
A 600 mm diameter and 25 m long driven concrete pile carries a column load of 1200 kN. It is estimated that the shaft carries 900 kN and the point carries 300 kN. Determine the settlement of the pile head using the Poulos and Davis method with the following data: Es = 25 MN/m2, Ep = 30,000 MN/m2, and s = 0.2
Redo Problem 12.20 using Vesics method, assuming that the skin friction is distributed uniformly along the shaft. 12.20 A 600 mm diameter and 25 m long driven concrete pile carries a column load of 1200 kN. It is estimated that the shaft carries 900 kN and the point carries 300 kN. Determine the settlement of the pile head using the Poulos and Davis method with the following data: Es = 25 MN/m2, Ep = 30,000 MN/m2, and s = 0.2
Refer to Figure 18.9. A cantilever sheet pile is driven into a granular soil where the water table is 2 m (L1) below the top of the sand. The properties of the sand are =40, =17.5kN/m3, and sat=19kN/m3. It is proposed to excavate to a depth of 6 m (L) below the ground level. Determine the actual depth to which the sheet pile must be driven (L + D), using the net lateral pressure diagram. Note: Dactual=1.3(L3+L4)theory
Refer to Figure 18.13. Given L1 = 1.5 m, L2 = 3 m; for the sand, =33, =16.5kN/m3, sat=19.0kN/m3; and, for the clay, c=50kN/m2, =0, sat=20kN/m3. Determine the depth of sheet pile required, allowing for a 50% increase from the theoretical estimate.
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Figure 18.26a shows a pile. Let L = 20 m, D = 450 mm. Hf = 4m, f = 17.5 kN/m3, fill = 25. Determine the total downward drag force on the pile. Assume that the fill is located above the water table and that = 0.5 fill. FIG. 18.26 Negative skin friction
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