c. A concrete pile is 15m long and has 406 mm diameter circular cross section. The pile is fully embedded in sand, for which the unit weight y =18 kN/m³ and the frictional angle o = 30°. i. Calculate the ultimate point load Qp. ii. Determine the total frictional resistance Qs. iii. Determine the total ultimate load of the pile.

c. A concrete pile is 15m long and has 406 mm diameter circular cross section. The pile is fully embedded in sand, for which the unit weight y =18 kN/m³ and the frictional angle o = 30°. i. Calculate the ultimate point load Qp. ii. Determine the total frictional resistance Qs. iii. Determine the total ultimate load of the pile.

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 12.12P

See similar textbooks

Similar questions

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)]
6) A 2-ft x 2-ft square concrete pile is shown. Ignore the resistance of the soft clay. Assume Na 10. For a safety factor of 3.0, the allowable load capacity of the pile is most nearly: a. 344 kips b. 169 kips c. 128 kips d. 225 kips 5 ft 30 ft R SOFT CLAY y=120 pcf SAND Y = 115 pcf =32°
A circular concrete pile 350 mm in diameter is to support a load of 270kN.Itis driven in a stiff clay (α = 0.50). The unconfined compressive strength of clay is 170 kPa. Assume a factor of safety of 2.50 and Nc = 9. Determine the end bearing capacity of the pile. Determine the developed skin friction along the surface of the pole. Determine the minimum length of the pile that can carry the given load
P-2 A driven closed-ended pile, circular in cross section, is shown in the Figure. Calculate the following: Layer I Groundwater 3 m táble a. The ultimate point load using Meyerhof's procedure. 3 m Layer II b. The ultimate frictional resistance Qs. [Take K = 1.4 and ô'= 0.6º'] c. The allowable load of the pile (use FS = 3 15 m Layer II d. Calculate the (a), (b) and (c) if the layer III was a Clay soil with C,=80 kPa (use ca-method by Terzaghi and FS = 3) %3D Layer I Y = 15.7 kN/m³ 4' = 32° Layer II = 18.2 kN/m3 Ysat = 19.2 kN/m³ Layer III 381 mm Ysat 4' = 32° c' = 0 = 40° c' = 0 c' = 0
A 10m long and 0.8m diameter precast concrete pile is driven into a saturated clay deposit as shown in the figure below. The groundwater table is at the ground surface. For the ratio of the undrained shear strength to vertical effective pressure is approximated as follows: = 0.11 + 0.0037(PI) NC (9- 9 (OCR)8 OC Determine the bearing capacity for the pile by the a) Alpha (a) method. b) Lambda (A) method Depth, m Layer 1 OCR = 5, Yat = 19.5 kN/m³, Pl = 35 Layer 2 OCR = 1.5, %at = 19.0 kN/m, Pl = 25 Layer 3 OCR = 8, %at = 19.5 kN/m, Pl = 20 10 D, = 0.8 m D 10 m
P-1 A driven closed-ended pile, circular in cross section, is shown in the Figure. Calculate the following: Layer I Groundwater 3 m táble a. The ultimate point load using Meyerhof's procedure. 3 m Layer II b. The ultimate frictional resistance Qs. [Take K = 1.4 and ô'= 0.64'] c. The allowable load of the pile (use FS = 3 15 m Layer III d. Calculate the (a), (b) and (c) if the layer III was a Clay soil with C,=80 kPa (use a-method by Terzaghi and FS = 3) %3D Layer II = 18.2 kN/m3 Layer I Layer III Y = 15.7 kN/m³ o' = 32° c' = 0 19.2 kN/m3 381 mm Ysat 6' = 32° c' = 0 Ysat 4' = 40° c' = 0 Chabie Ch
A rectangular pile (0.77 x 0.72 m) is driven in a clayey soil arrangement composed of two different layers. First layer has a height of 7 m, cohesion of 53 kPa, friction factor of 0.89. Second layer has a height of 8 m , cohesion of 78 kPa, and friction factor of 0.88. Compute the allowable load, in kN, that the pile can carry if the factor of safety is 2.00. Compute the skin friction resistance in kN. Compute the end bearing capacity in kN. Round off to two decimal places.
A 12 inch diameter concrete pile is to be driven into a clay deposit as shown in Figure 2. The pile's design capacity is 30 tons. Determine the length of the pile to carry that 30 tons load if the factor of safety is 2. O Design = 30 tons L = ? Clay Unconfined Compression Strength, qu= 4800 psf Y = 126 pcf - - 12 in. Diameter
A 15 m pile is driven into clay with a subgrade modulus (ksub) of 30 000 kPa/m. The concrete pile has a diameter of 500 mm. E concrete = 28e6 kN/m2 The pile is subjected to a horizontal load of 130 kN at ground level. Calculate the bending moment distribution at 1m intervals along the length of the pile.
11 A rectangular pile (0.67 x 0.5 m.) is driven in a clayey soil arrangement composed of two different layers. First layer has a height of 5 m., cohesion of 52 kPa, friction factor of 0.81. Second layer has a height of 6 m., cohesion of 70 kPa, and friction factor of 0.8. Compute the allowable load that the pile can carry if the factor of safety is 2.93. Round off to two decimal places.
A prestressed concrete pile, 484 mm in diameter, is to be driven in a clayey soil. The pile has a design capacity of 446 kN. Use FS = 2, unconfined compressive strength = 171 kPa. Compute the length (in m.) of the pile if the frictional constant is 0.8. Round off to two decimal places.
A prestressed concrete pile, 406 mm in diameter, is to be driven in a clayey soil. The pile has a design capacity of 441 kN. Use FS = 3, unconfined compressive strength = 178 kPa. Compute the length (in m.) of the pile if the frictional constant is 0.8.