EBK ENGINEERING FUNDAMENTALS: AN INTROD
5th Edition
ISBN: 8220100543401
Author: MOAVENI
Publisher: CENGAGE L
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Chapter 20, Problem 36P
(a)
To determine
Using Excel, find the effective rate for
(b)
To determine
Using Excel, find the effective rate for
(c)
To determine
Using Excel, find the effective rate for
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The figure below shows a foundation of 10 ft x 6.25 ft resting on a sand deposit. The net load per unit area at the level of the foundation, qo, is 2100 lb/ft². For the sand, μs = 0.3, E, = 3200 lb/in.², Dƒ = 2.5 ft, and H = 32 ft.
Foundation BX L
Rigid
foundation
settlement
Flexible
foundation
settlement H
μ, Poisson's ratio
E, = Modulus of elasticity
Soil
Rock
Elastic settlement of flexible and rigid foundations
Table 1 Variation of F₁ with m' and n'
m'
n'
1.0 1.2 1.4 1.6 1.8 2.0 2.5 3.0
0.25 0.014 0.013 0.012 0.011 0.011 0.011 0.010 0.010
0.50 0.049 0.046 0.044 0.042 0.041 0.040 0.038 0.038
1.00 0.142 0.138 0.134 0.130 0.127 0.125 0.121 0.118
2.00 0.285 0.290 0.292 0.292 0.291 0.289 0.284 0.279
5.00 0.437 0.465 0.487 0.503 0.516 0.526 0.543 0.551
10.00 0.498 0.537 0.570 0.597 0.621 0.641 0.679 0.707
20.00 0.529 0.575 0.614 0.647 0.677 0.702 0.756 0.797
50.00 0.548 0.598 0.640 0.678 0.711 0.740 0.803 0.853
100.00 0.555 0.605 0.649 0.688 0.722 0.753 0.819 0.872
Table 2 Variation of F2…
=
==
An 8 m high retaining wall supports a 5.5 m deep sand (Ya
18.5 kN/m³, q = 34°) overlying a saturated sandy clay (y_sat
= 20.3 kN/m³, q = 28°, c = 17 kPa). The groundwater level is
located at the interface of two layers. Sketch the lateral stress
distribution up to a depth of 8 m for an active condition. Also,
determine the line of action of the resultant.
5.5 m
Sand
|Y=18.5 kN/m³
|₁ =34°
Sandy
: clay
2.5 m
|c=17 kPa
Ysat 20.3 kN/m³
2=28°
3. What is the maximum allowable load that can be applied to the pile shown below? :
Qall = ?
G.W.T.
45'
Soft Clay:
Ysat 100 pcf
Cu = 500 psf, ou = 0°
Clay Shale:
Qu(lab) 24,000 psi
o' = 15°
Driven Steel H-Pile:
1/2" thick steel web
& flanges
(soil plugged)
-10".
I
Note: Pile & soil profile
are not drawn to scale
Please use the approach outlined in Das 12.16 and an Allowable Stress Design (ASD)
approach for your analysis. Use a factor of safety = 3 for design, neglect any effect that shaft
resistance has on pile capacity, and neglect the effect of the weight of the pile in your
analysis.
Chapter 20 Solutions
EBK ENGINEERING FUNDAMENTALS: AN INTROD
Ch. 20.4 - Prob. 1BYGCh. 20.4 - Prob. 2BYGCh. 20.4 - Prob. 3BYGCh. 20.4 - Prob. 4BYGCh. 20.4 - Prob. 5BYGCh. 20.4 - Prob. BYGVCh. 20.5 - Prob. 1BYGCh. 20.5 - Prob. 2BYGCh. 20.5 - Prob. 3BYGCh. 20.5 - Prob. BYGV
Ch. 20.8 - Prob. 1BYGCh. 20.8 - Prob. 2BYGCh. 20.8 - Prob. 3BYGCh. 20 - Prob. 1PCh. 20 - Prob. 2PCh. 20 - Prob. 3PCh. 20 - Prob. 4PCh. 20 - Prob. 5PCh. 20 - Prob. 6PCh. 20 - Prob. 7PCh. 20 - Prob. 8PCh. 20 - Prob. 9PCh. 20 - Prob. 10PCh. 20 - Prob. 11PCh. 20 - Prob. 12PCh. 20 - Prob. 13PCh. 20 - Prob. 14PCh. 20 - Prob. 15PCh. 20 - Prob. 16PCh. 20 - Prob. 17PCh. 20 - Prob. 18PCh. 20 - Prob. 19PCh. 20 - Prob. 20PCh. 20 - Prob. 21PCh. 20 - Prob. 22PCh. 20 - Prob. 23PCh. 20 - Prob. 24PCh. 20 - Prob. 25PCh. 20 - Prob. 26PCh. 20 - Prob. 27PCh. 20 - Prob. 28PCh. 20 - Prob. 29PCh. 20 - Prob. 30PCh. 20 - Prob. 31PCh. 20 - Prob. 32PCh. 20 - Prob. 33PCh. 20 - Prob. 34PCh. 20 - Prob. 35PCh. 20 - Prob. 36PCh. 20 - Prob. 37PCh. 20 - Prob. 38PCh. 20 - Prob. 39PCh. 20 - Prob. 40PCh. 20 - Prob. 41PCh. 20 - Prob. 42PCh. 20 - Prob. 43PCh. 20 - Prob. 44PCh. 20 - Prob. 45PCh. 20 - Prob. 46PCh. 20 - Prob. 47PCh. 20 - Prob. 48PCh. 20 - Prob. 49PCh. 20 - Prob. 50PCh. 20 - Prob. 52PCh. 20 - Prob. 53PCh. 20 - Prob. 54P
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