A column load of 72 kips is applied to the 6 ft by 8 ft rectangular concrete footing shown below. The groundwater table is 2 ft deep. The soil profile and properties are shown below. The required minimum factor of safety against bearing
A column load of 72 kips is applied to the 6 ft by 8 ft rectangular concrete footing shown below. The groundwater table is 2 ft deep. The soil profile and properties are shown below. The required minimum factor of safety against bearing
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Question
A column load of 72 kips is applied to the 6 ft by 8 ft rectangular concrete footing shown below.
The groundwater table is 2 ft deep. The soil profile and properties are shown below.
The required minimum factor of safety against bearing capacity failure is 2.5. Is the current
foundation design acceptable? Use Vesic’s bearing capacity formula
1a. Intermediate calculation: compute the ultimate bearing capacity, qult, in units of psf.
1b. Intermediate calculation: compute the applied bearing pressure, q, in units of psf.
1c. Final calculation: compute the factor of safety (FS) against bearing capacity failure.
![2 ft
18 ft
6 ft
P = 72 kips
SW, y = 118 pcf
CH
Su = 665 psf
$=0
Y = 100 pcf
OCR = 2
Gravel
PI = 40
Cc = 0.22
C₁ = 0.04
cv = 0.075 ft²/day
eo = 1.2](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F669cd848-f6cb-4d2d-b698-085712d01b58%2F487accba-ad5e-43a4-adcb-f9eb00844957%2Fx0vlbbi_processed.png&w=3840&q=75)
Transcribed Image Text:2 ft
18 ft
6 ft
P = 72 kips
SW, y = 118 pcf
CH
Su = 665 psf
$=0
Y = 100 pcf
OCR = 2
Gravel
PI = 40
Cc = 0.22
C₁ = 0.04
cv = 0.075 ft²/day
eo = 1.2
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