Principles of Foundation Engineering (MindTap Course List)
9th Edition
ISBN: 9781337705028
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 12, Problem 12.28P
To determine
Find the allowable load for the pile using the modified EN formula.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
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
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
A 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
%3D
Chapter 12 Solutions
Principles of Foundation Engineering (MindTap Course List)
Ch. 12 - Prob. 12.1PCh. 12 - A 20 m long concrete pile is shown in Figure...Ch. 12 - A 500 mm diameter are 20 m long concrete pile is...Ch. 12 - Redo Problem 12.3 using Coyle and Castellos...Ch. 12 - A 400 mm 400 mm square precast concrete pile of...Ch. 12 - Determine the maximum load that can be allowed on...Ch. 12 - A driven closed-ended pile, circular in cross...Ch. 12 - Consider a 500 mm diameter pile having a length of...Ch. 12 - Determine the maximum load that can be allowed on...Ch. 12 - Prob. 12.10P
Ch. 12 - Prob. 12.11PCh. 12 - Prob. 12.12PCh. 12 - A concrete pile 16 in. 16 in. in cross section is...Ch. 12 - Prob. 12.14PCh. 12 - Solve Problem 12.13 using Eqs. (12.59) and...Ch. 12 - Prob. 12.16PCh. 12 - Prob. 12.17PCh. 12 - A steel pile (H-section; HP 310 125; see Table...Ch. 12 - Prob. 12.19PCh. 12 - A 600 mm diameter and 25 m long driven concrete...Ch. 12 - Redo Problem 12.20 using Vesics method, assuming...Ch. 12 - Prob. 12.22PCh. 12 - Prob. 12.23PCh. 12 - Solve Problem 12.23 using the method of Broms....Ch. 12 - Prob. 12.25PCh. 12 - Solve Problem 12.25 using the modified EN formula....Ch. 12 - Solve Problem 12.25 using the modified Danish...Ch. 12 - Prob. 12.28PCh. 12 - Prob. 12.29PCh. 12 - Figure 12.49a shows a pile. Let L = 15 m, D (pile...Ch. 12 - Redo Problem 12.30 assuming that the water table...Ch. 12 - Refer to Figure 12.49b. Let L = 18 m, fill = 17...Ch. 12 - Estimate the group efficiency of a 4 6 pile...Ch. 12 - The plan of a group pile is shown in Figure...Ch. 12 - Prob. 12.35PCh. 12 - Figure P12.36 shows a 3 5 pile group consisting...Ch. 12 - Prob. 12.37P
Knowledge Booster
Learn more about
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
- Determine the diameter of 70 ft long pile driven in the medium dense sand (Shown in Figure). Design load is 185Kips and factor of safety can be assumed to be 2.5. Frictional coefficient is 0.45 Sand y = 115lb/ft3 Ø = 28° K = 0.80 30 %3D Sand 128lb/ft %3! Ysat Ø= 30° K = 0.85 33°C 70arrow_forwardA 450 mm x 450 mm concrete pile 20.0 m long is driven into sand deposits with y = 17 kN/m³ and = 30°. Find the ultimate load i.e. point load Qp by Meyerhoff's method and Janbu method. Meyerhoff's N = 55, Atmospheric pressure = 100 kN/m², Janbu's N = 18.4arrow_forwardA driven closed-ended pile, circular in cross section, is show in below figure P10. Calculate the following: 1). the ultimate point load Qp, using Meyehof's equations (9.15) and (9.16); 2). The ultimate frictional resistance Q, with equations (9.40) through (9.44); 3). Calculate allowable load-carrying capacity for the pile with FS of 3. (K = 1.4; 8' = 0.80') 15.7 kN/m d' = 32° c' =0 3 m Groundwater table = 18.2 kN/m Ysat d' = 32° 3 m c = 0 Yat = 19.2 kN/m³ 4' = 40" c = 0 15 m 381 mmarrow_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_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 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 = 0.2arrow_forward
- Find the maximum pile capacity for the pile group shown in figure below. If My = 500 kN.m and V = 7200 kN. 'My X=1.4 - x=1.4- y=1.2 y=1.2arrow_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_forwardQ1/ For the footing shown in Figure (1), estimate the pile group capacity. 0.6m dia bored pile Clay c=80 kN/m² y-17kN/m² S=1.5 m T L=12 marrow_forward
arrow_back_ios
arrow_forward_ios
Recommended textbooks for you
- Fundamentals of Geotechnical Engineering (MindTap...Civil EngineeringISBN:9781305635180Author:Braja M. Das, Nagaratnam SivakuganPublisher:Cengage LearningPrinciples of Foundation Engineering (MindTap Cou...Civil EngineeringISBN:9781337705028Author:Braja M. Das, Nagaratnam SivakuganPublisher:Cengage Learning
Fundamentals of Geotechnical Engineering (MindTap...
Civil Engineering
ISBN:9781305635180
Author:Braja M. Das, Nagaratnam Sivakugan
Publisher:Cengage Learning
Principles of Foundation Engineering (MindTap Cou...
Civil Engineering
ISBN:9781337705028
Author:Braja M. Das, Nagaratnam Sivakugan
Publisher:Cengage Learning