=The allowable working load on a prestressed concrete pile 21-m long that has been driven356 mm (see Table 9.3a).into sand is 502 kN. The pile is octagonal in shape with DSkin resistance carries 350 kN of the allowable load, and point bearing carries the rest.Use E, = 21 x 10° kN/m², E, = 25 x 103 kN/m², p, 0.35, and = 0.62. Determine thesettlement of the pile.==

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Answered: = The allowable working load on a…

Principles of Foundation Engineering (MindTap Course List)

9th Edition

ISBN:9781337705028

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter12: Pile Foundations

Section: Chapter Questions

Problem 12.2P: A 20 m long concrete pile is shown in Figure P12.2. Estimate the ultimate point load Qp by a....

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A 20 m long concrete pile is shown in Figure P12.2. Estimate the ultimate point load Qp by a. Meyerhofs method b. Vesics method c. Coyle and Castellos method Use m = 600 in Eq. (12.28).
A fully embeded precast, prestressed concrete pile is 12 m long and is driven into homogeneous layer of sand. The pile is square in cross section, with sides measuring 305 mm. The dry unit weight of sand is 16.8 kN/m, and the average effective soil friction angle is 35°. The allowable working load is 338 kN. If 240 kN is contributed by the frictional resistance and 98 kN is from the point load, determine the elastic settlement of the pile. Use Ep 21 x 10 kN/m², E, 30000 kN/m², and μ-0.3.
Refer to the pile shown in Figure P9.1. Estimate the side resistance Qs by Using Eqs. (9.40) through (9.42). Use K = 1.5 and Coyle and Castello’s method [Eq. (9.44)]
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
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).
The tie rods from anchored sheet piles will be connected using a row of anchors, as shown in Figure 18.46a. Here H = 2.0 m, h = 1.25 m, B = 1.5 m, S = 2.5 m, = 32, and = 17.5 kN/m3. The anchor plates are made of 100 mm thick reinforced concrete with a unit weight of 24.0 kN/m3. Determine the ultimate holding capacity of the anchor used Ovesen and Stromanns method.
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
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
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 = 1.4 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.
A 500 mm diameter are 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.
Refer to Figure 18.23. Given L1=3m, L2=6m, l1=1.5m, =16.5kN/m3, sat=19.0kN/m3 and =35. a. Find the required depth of the sheet pile, increasing the theoretical estimate by 30%. b. Determine the force in the tie rods if they are spaced 3 m apart horizontally. c. Find the maximum bending moment in the sheet pile.
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.

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