Bundle: Fundamentals Of Geotechnical Engineering, 5th + Mindtap Engineering, 1 Term (6 Months) Printed Access Card
5th Edition
ISBN: 9781337060417
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
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Chapter 18, Problem 18.18P
To determine
Find the capacity
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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
Please solve it complete in one hour
A concrete bored pile has a diameter of 800 mm as given in the figure
below. Calculate the ultimate load carrying capacity of the pile.
-0.8-
Clay
Cu = 60 kN/m²
Y = 18 kN/m³
%3D
4m
G.W.T
Sand
6m
$ = 30°
Y = 20 kN/m³
Clay
Cu = 100 kN/m²
Y = 20 kN/m³
5m
Chapter 18 Solutions
Bundle: Fundamentals Of Geotechnical Engineering, 5th + Mindtap Engineering, 1 Term (6 Months) Printed Access Card
Ch. 18 - State whether the following are true or false. a....Ch. 18 - A 1500 kN load was applied on two 20 m long and...Ch. 18 - A 500 mm diameter and 20 m long concrete pile is...Ch. 18 - A 400-mm diameter and 15 m long concrete pile is...Ch. 18 - A 400 mm 400 mm square precast concrete pile of...Ch. 18 - Prob. 18.6PCh. 18 - Prob. 18.7PCh. 18 - Prob. 18.8PCh. 18 - Determine the maximum load that can be allowed on...Ch. 18 - Prob. 18.10P
Ch. 18 - Redo Problem 18.10 using the method for...Ch. 18 - Determine the maximum load that can be allowed on...Ch. 18 - Prob. 18.13PCh. 18 - A steel pile (H-section; HP 360 1.491; see Table...Ch. 18 - A concrete pile is 18 m long and has a cross...Ch. 18 - Prob. 18.16PCh. 18 - Prob. 18.17PCh. 18 - Prob. 18.18PCh. 18 - Prob. 18.19PCh. 18 - Figure 18.26a shows a pile. Let L = 20 m, D = 450...Ch. 18 - Refer to Figure 18.26b. Let L = 15.24 m, fill =...Ch. 18 - Prob. 18.22PCh. 18 - Figure 18.39 shows a 3 5 pile group consisting of...Ch. 18 - The section of a 4 4 group pile in a layered...Ch. 18 - Prob. 18.25PCh. 18 - Prob. 18.26CTP
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- 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)]arrow_forwardA 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).arrow_forwardA steel H-pile (section HP13 × 100) is driven by a hammer. The maximum rated hammer energy is 40 kip-ft, the weight of the ram is 12 kip, and the length of the pile is 90 ft. Also, we have coefficient of restitution pile cap = 2.4 kip, hammer efficiency = 0.85, number of blows for the last inch of penetration = 10, and E, = 30 × 10° lb/in.?. Estimate the pile capacity using Eq. (9.114). Take FS = 6. 0.35, weight of the %3Darrow_forward
- 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' = 0arrow_forwardQUESTION 3: Three forces act on a pile as shown. If the resultant of the three forces is equal to 500 N and is directed vertically, what is the magnitude and direction of F3. F2= 100 N F3 F,= 75 N 35° 40° Pile (Answer: F3=365 N, E=76.8°)arrow_forwardi need the answer quicklyarrow_forward
- 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. Diameterarrow_forwardP-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 Charrow_forwardProblem 2. A concrete pile 16 in. × 16 in. in cross section is shown in Figure below. Calculate the allowable capacity, Qall, of the pile using the a method. Assume a factor of safety equal to 3. 20 ft 40 ft 16 in. Water table Silty clay Y = 118 lb/ft³ Cu = 700 lb/ft² Silty clay Ysat = 122.4 lb/ft³ Cu = 1500 lb/ft²arrow_forward
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