EBK PRINCIPLES OF FOUNDATION ENGINEERIN
8th Edition
ISBN: 9780100547056
Author: Das
Publisher: YUZU
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Chapter 9, Problem 9.13P
To determine
Find the ultimate load carrying capacity of the pile.
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Please answer 11.15
(Answer)
32.5kN
12.16 Consider a continuous flight auger pile in a sandy soil de-
posit 10 m long with a diameter of 0.45 m. Following is the
variation of standard penetration resistance values (N60) with
depth.
Depth (m)
1.5
3.0
4.5
6.0
7.5
9.0
10.5
12.0
13.5
15.0
17.0
18.5
20.0
N60
6
7
5
8
10
10
13
15
18
20
17
18
21
Estimate the ultimate load-carrying capacity of the pile.
Assume unit weight of soil, y = 15.5 kN/m³.
A pile of diameter 0.4 m is fully embedded in a clay stratum having 5 layers, each 5 m thick as
shown in the figure below. Assume a constant unit weight of soil as 18 kN/m³ for all the layers.
Using method (= 0.15 for 25 m embedment length) and neglecting the end bearing
component, the ultimate pile capacity (in kN) is
G
Y=18kN/m³-
for all layers
7XXX
5m
5m
5m
5m
5m
= 25 m
0.4m,
c=40 kPa
c=50 kPa
c=60 kPa
c=70 kPa
c=80 kPa
S
XXXX
Chapter 9 Solutions
EBK PRINCIPLES OF FOUNDATION ENGINEERIN
Ch. 9 - A 20 m long concrete pile is shown in Figure...Ch. 9 - Refer to the pile shown in Figure P9.1. Estimate...Ch. 9 - Prob. 9.3PCh. 9 - A driven closed-ended pile, circular in cross...Ch. 9 - Prob. 9.5PCh. 9 - Prob. 9.6PCh. 9 - Prob. 9.7PCh. 9 - Prob. 9.8PCh. 9 - Prob. 9.9PCh. 9 - A concrete pile 16 in. 16 in. in cross section is...
Ch. 9 - Prob. 9.11PCh. 9 - Solve Problem 12.13 using Eqs. (12.59) and...Ch. 9 - Prob. 9.13PCh. 9 - Prob. 9.14PCh. 9 - A steel pile (H-section; HP 310 125; see Table...Ch. 9 - A concrete pile is 20 m long and has a cross...Ch. 9 - Prob. 9.17PCh. 9 - Prob. 9.18PCh. 9 - Solve Problem 12.23 using the method of Broms....Ch. 9 - Prob. 9.20PCh. 9 - Solve Problem 12.25 using the modified EN formula....Ch. 9 - Solve Problem 12.25 using the modified Danish...Ch. 9 - Figure 12.49a shows a pile. Let L = 15 m, D (pile...Ch. 9 - Redo Problem 12.30 assuming that the water table...Ch. 9 - Refer to Figure 12.49b. Let L = 18 m, fill = 17...Ch. 9 - A concrete pile measuring 16 in. × 16 in. in cross...Ch. 9 - The plan of a group pile is shown in Figure...Ch. 9 - Prob. 9.28PCh. 9 - The section of a 4 × 4 group pile in a layered...Ch. 9 - Prob. 9.30P
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.Similar questions
- In Problem 18.4, find the maximum bending moment in the sheet pile and determine the required section modulus, assuming an allowable stress of 190 MN/m2. 18.4 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.arrow_forwardRefer 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.arrow_forwardPlease answer 11.22arrow_forward
- Please solve quicklyarrow_forwardA 600mm diameter open ended steel pipe pile is driven to the soil profile mentioned below. Loose silty sand layer has a Ymoist=16.5kN/m3 and Ysat=18kN/m3, medium dense well graded sand layer has Ysat=20kN/m3 . Laboratory tests have shown that effective internal friction angle of silty sand and well graded sand are 30º and 35º respectively. Calculate the toe bearing capacity by using Vesic/Kulhawy method. Using a FS of 3, calculate the allowable downward load capacity of the pile.arrow_forwardQ- A pile of 0.50 m diameter and of length 10 m is embedded in a deposit of clay. The undrained strength parameters of the clay are cohesion = 60 kN/m² and the angle of internal friction = 0. Find the skin friction capacity (kN) of the pile for an adhesion factor of 0.6.arrow_forward
- 7. If a 45 cm diameter pipe pile is driven into clayey soil to a depth of 12 m. (a) what would the allowable load capacity (Q) be? The water table is 2 m below the ground surface and the soil profile consists of two clay layers (refer to the figure below). Use the ß method to calculate skin friction and the R=30° for all clay layers. (b) Explain how you selected FS value you use. 12 m 9m 2 m 45 cm Y = 18.5kN/m²³ C= 30kN/m² Ysat = 19kN/m³ Cu = 30kN/m² Ysat = 20kN/m² S = 60kN/m²arrow_forward7. If a 45 cm diameter pipe pile is driven into clayey soil to a depth of 12 m. (a) what would the allowable load capacity (Q) be? The water table is 2 m below the ground surface and the soil profile consists of two clay layers (refer to the figure below). Use the ß method to calculate skin friction and the R=30° for all clay layers. (b) Explain how you selected FS value you use. 12 m ▶ 9m 2m 45 cm Y = 18.5kN/m³ = 30kN/m² Ysat = 19kN/m³ C₂ = 30kN/m² Ysat = 20kN/m² S = 60kN/m²arrow_forwardThe Figure below shows a long pile wall driven in sand with Coefficient of permeability K= 0.05cm/sec.it is required to: 1.Estimate the max. possible value of dimension h, where Ah=1.2. 2.Calculate the seepage loss (m /day) per meter of wallarrow_forward
- Refer to the pipe pile in saturated clay shown in Figure 1. For the pile, Calculate the skin resistance (Qs) by (1) the α method, (2) the λ method, and (3) the β method. For the β method, use ϕ’R= 300 for all clay layers. The top 10 m of clay is normally consolidated.The bottom clay layer has an OCR = 2. (Note: diameter of pile = 457 mm) Using the results of Exercise 10, estimate the allowable pile capacity (Qall). Use FS = 4arrow_forward12.10 A concrete pile 15.24 m long having a cross section of 406 mm × 406 mm is fully embedded in a saturated clay layer for which Ysat = 19.02 kN/m³, p = 0, and c₂ = 76.7 kN/m². Determine the allowable load that the pile can carry. (Let FS = 3.) Use the a method Eq. (12.61) and Table 12.11 to estimate the skin friction and Vesic's method for point load estimation.arrow_forwardA 50 cm square precast pile is driven by 9 m into a sandy soil. The standard penetration test results, prformed on this ground, are given in the table below: Depth below ground surface (m) SPT (Nss) 1.5 3.0 4.5 4 6 6.0 12 12 20 24 35 39 If the skin resistance is equal to {T, = 2 x (average Nss along the pile shaft)) kPa. Compute the factor of safety available, if 1100 kN of compressive load is applied on this pile. 7.5 9.0 10.5 12.0arrow_forward
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