Principles of Foundation Engineering (MindTap Course List)
9th Edition
ISBN: 9781337705028
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
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Textbook Question
Chapter 12, Problem 12.13P
A concrete pile 16 in. × 16 in. in cross section is shown in Figure P12.13. Calculate the ultimate skin friction resistance by using the
- a. α method [use Eq. (12.61) and Table 12.11]
- b. λ method
- c. β method
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Ex 11: Design inlet system for the road in figure below with
catchment area=86 m*239 m. C=0.8, i=100 mm/hr, Gutter data: y
max.=8cm, n=0.018, k=0.38, slope=%1, Z=25, %25 clogging,
(space=bar=2 cm). Inlet type used (consists of tow part curb and
Q grad inlet =0.6Qgutter max.
grade inlet) Q curb inlet =0.4Qgutter max.
0.8*100
3600*1000
Solution: (Qs) Total=CIA=
Qgutter (Max.)=k²√√s y8/3 = 0.38-
25
0.018
*(86*239)=0.457 m³/s
√0.01 0.088/3= 0.0627 m³/s
30 m
12 m
2mL
12 m
30 m
Residence
30 m
Streat
12 m
Bof
2 m
ㅈ
239 m
A2
A1
(20
02 A concrete beam of rectangular cross-section (300 x 400) mm is Prestressed with
wires located at (30) mm from the top of the beam .The wires are initially tensioned to
0-6 mm) diameter wires at (100) mm from the soffit of the beam and (5-6 mm)
a stress of (900 N/mm²). Compute the percentage loss of stress in steel after transfer due
to elastic deformation of concrete.
Given: Es=200 x 103 N/mm², Ec = 25 x 10³ N/mm².
300
за
60000
400
100
546
2046
Reinforced Concrete Design
First Monthly Exam
24/02/2
Q1. A simply supported rectangular beam (300 x 400) mm and span (12) m with live load of
from the soffit of the beam. Compute the stresses at mid-span of beam for the following
(5 kN/m). At the centre of the beam the prestressing force of (120) kN is located at (50 mm)
conditions:
(a) Prestress + self- weight of beam (initial stage).
(b) Prestress + self- weight of beam + Live Load (service stage).
3:00
400
120
K
*
12m
5kN/m.
120 KN
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
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