0.50 0.074 0.077 0.080 0.081 0.083 0.084 0.086 0.086 1.00 0.083 0.091 0.098 0.102 0.106 0.109 0.114 0.117 2.00 0.064 0.074 0.083 0.090 0.097 0.102 0.114 0.121 5.00 0.031 0.036 0.042 0.048 0.053 0.058 0.070 0.080 10.00 0.016 0.019 0.022 0.025 0.028 0.031 0.038 0.046 20.00 0.008 0.010 0.011 0.013 0.014 0.016 0.020 0.024 50.00 0.003 0.004 0.004 0.005 0.006 0.006 0.008 0.010 100.00 0.002 0.002 0.002 0.003 0.003 0.003 0.004 0.005 Table 3 Variation of If with D₂/B. B/L, and με B/L με D₤/B 0.2 0.5 1.0 0.3 0.2 0.95 0.93 0.90 0.4 0.90 0.86 0.81 0.6 0.85 0.80 0.74 1.0 0.78 0.71 0.65 0.4 0.2 0.97 0.96 0.93 0.4 0.93 0.89 0.85 0.6 0.89 0.84 0.78 1.0 0.82 0.75 0.69 0.5 0.2 0.99 0.98 0.96 0.4 0.95 0.93 0.89 0.6 0.92 0.87 0.82 1.0 0.85 0.79 0.72 Assume that the foundation is rigid and determine the elastic settlement the foundation would undergo. Use the equations Se = q. (αB') 1- με · Is Iƒ Es and S e(rigid) ≈0.93.S Pe(flexible,center) (Enter your answer to two significant figures.) Se = in. 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 with m' and n' m' n' 1.0 1.2 1.4 1.6 1.8 2.0 2.5 3.0 0.25 0.049 0.050 0.051 0.051 0.051 0.052 0.052 0.052 0.50 0.074 0.077 0.080 0.081 0.083 0.084 0.086 0.086 1.00 0.083 0.091 0.098 0.102 0.106 0.109 0.114 0.117 2.00 0.064 0.074 0.083 0.090 0.097 0.102 0.114 0.121 5.00 0.031 0.036 0.042 0.048 0.053 0.058 0.070 0.080 10.00 0.016 0.019 0.022 0.025 0.028 0.031 0.038 0.046 20.00 0.008 0.010 0.011 0.013 0.014 0.016 0.020 0.024 50.00 0.003 0.004 0.004 0.005 0.006 0.006 0.008 0.010 100.00 0.002 0.002 0.002 0.003 0.003 0.003 0.004 0.005 Table 3 Variation of If with D₁/B. B/L, and με DIT

Principles of Foundation Engineering (MindTap Course List)
8th Edition
ISBN:9781305081550
Author:Braja M. Das
Publisher:Braja M. Das
Chapter5: Ultimate Bearing Capacity Of Shallow Foundations: Special Cases
Section: Chapter Questions
Problem 5.1P
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Related questions
Question
0.50 0.074 0.077 0.080 0.081 0.083 0.084 0.086 0.086
1.00 0.083 0.091 0.098 0.102 0.106 0.109 0.114 0.117
2.00 0.064 0.074 0.083 0.090 0.097 0.102 0.114 0.121
5.00 0.031 0.036 0.042 0.048 0.053 0.058 0.070 0.080
10.00 0.016 0.019 0.022 0.025 0.028 0.031 0.038 0.046
20.00 0.008 0.010 0.011 0.013 0.014 0.016 0.020 0.024
50.00 0.003 0.004 0.004 0.005 0.006 0.006 0.008 0.010
100.00 0.002 0.002 0.002 0.003 0.003 0.003 0.004 0.005
Table 3 Variation of If with D₂/B. B/L, and
με
B/L
με
D₤/B
0.2
0.5
1.0
0.3
0.2
0.95
0.93
0.90
0.4
0.90
0.86
0.81
0.6
0.85
0.80
0.74
1.0
0.78
0.71
0.65
0.4
0.2
0.97
0.96
0.93
0.4
0.93
0.89
0.85
0.6
0.89
0.84
0.78
1.0
0.82
0.75
0.69
0.5
0.2
0.99
0.98
0.96
0.4
0.95
0.93
0.89
0.6
0.92
0.87
0.82
1.0
0.85
0.79
0.72
Assume that the foundation is rigid and determine the elastic settlement the foundation would undergo. Use the equations
Se = q. (αB')
1- με
· Is Iƒ
Es
and
S
e(rigid)
≈0.93.S
Pe(flexible,center)
(Enter your answer to two significant figures.)
Se
=
in.
Transcribed Image Text:0.50 0.074 0.077 0.080 0.081 0.083 0.084 0.086 0.086 1.00 0.083 0.091 0.098 0.102 0.106 0.109 0.114 0.117 2.00 0.064 0.074 0.083 0.090 0.097 0.102 0.114 0.121 5.00 0.031 0.036 0.042 0.048 0.053 0.058 0.070 0.080 10.00 0.016 0.019 0.022 0.025 0.028 0.031 0.038 0.046 20.00 0.008 0.010 0.011 0.013 0.014 0.016 0.020 0.024 50.00 0.003 0.004 0.004 0.005 0.006 0.006 0.008 0.010 100.00 0.002 0.002 0.002 0.003 0.003 0.003 0.004 0.005 Table 3 Variation of If with D₂/B. B/L, and με B/L με D₤/B 0.2 0.5 1.0 0.3 0.2 0.95 0.93 0.90 0.4 0.90 0.86 0.81 0.6 0.85 0.80 0.74 1.0 0.78 0.71 0.65 0.4 0.2 0.97 0.96 0.93 0.4 0.93 0.89 0.85 0.6 0.89 0.84 0.78 1.0 0.82 0.75 0.69 0.5 0.2 0.99 0.98 0.96 0.4 0.95 0.93 0.89 0.6 0.92 0.87 0.82 1.0 0.85 0.79 0.72 Assume that the foundation is rigid and determine the elastic settlement the foundation would undergo. Use the equations Se = q. (αB') 1- με · Is Iƒ Es and S e(rigid) ≈0.93.S Pe(flexible,center) (Enter your answer to two significant figures.) Se = in.
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 with m' and n'
m'
n' 1.0 1.2 1.4 1.6 1.8 2.0 2.5 3.0
0.25 0.049 0.050 0.051 0.051 0.051 0.052 0.052 0.052
0.50 0.074 0.077 0.080 0.081 0.083 0.084 0.086 0.086
1.00 0.083 0.091 0.098 0.102 0.106 0.109 0.114 0.117
2.00 0.064 0.074 0.083 0.090 0.097 0.102 0.114 0.121
5.00 0.031 0.036 0.042 0.048 0.053 0.058 0.070 0.080
10.00 0.016 0.019 0.022 0.025 0.028 0.031 0.038 0.046
20.00 0.008 0.010 0.011 0.013 0.014 0.016 0.020 0.024
50.00 0.003 0.004 0.004 0.005 0.006 0.006 0.008 0.010
100.00 0.002 0.002 0.002 0.003 0.003 0.003 0.004 0.005
Table 3 Variation of If with D₁/B. B/L, and
με
DIT
Transcribed Image Text: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 with m' and n' m' n' 1.0 1.2 1.4 1.6 1.8 2.0 2.5 3.0 0.25 0.049 0.050 0.051 0.051 0.051 0.052 0.052 0.052 0.50 0.074 0.077 0.080 0.081 0.083 0.084 0.086 0.086 1.00 0.083 0.091 0.098 0.102 0.106 0.109 0.114 0.117 2.00 0.064 0.074 0.083 0.090 0.097 0.102 0.114 0.121 5.00 0.031 0.036 0.042 0.048 0.053 0.058 0.070 0.080 10.00 0.016 0.019 0.022 0.025 0.028 0.031 0.038 0.046 20.00 0.008 0.010 0.011 0.013 0.014 0.016 0.020 0.024 50.00 0.003 0.004 0.004 0.005 0.006 0.006 0.008 0.010 100.00 0.002 0.002 0.002 0.003 0.003 0.003 0.004 0.005 Table 3 Variation of If with D₁/B. B/L, and με DIT
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