SITUATION: A 12 ft x 10 ft footing carries a total load of 300 tons. Standard penetration test was conducted on the site. Test results were corrected for over burden pressure and corrected N-values are listed as shown. Determine the maximum settlement. Settlements of Loads on Sand (SPT) 29 Njowest Smax = maximum settlement on dry sand in inches 1+B 24 Smax =Xs 2B TAR) if the ground water table is located at a depth below the Njowest base of the footing less than the half the footings width (B/2).
SITUATION: A 12 ft x 10 ft footing carries a total load of 300 tons. Standard penetration test was conducted on the site. Test results were corrected for over burden pressure and corrected N-values are listed as shown. Determine the maximum settlement. Settlements of Loads on Sand (SPT) 29 Njowest Smax = maximum settlement on dry sand in inches 1+B 24 Smax =Xs 2B TAR) if the ground water table is located at a depth below the Njowest base of the footing less than the half the footings width (B/2).
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:0.4261
0.4238
0.4393
0.4387
Transcribed Image Text:SITUATION: A 12 ft x 10 ft footing carries a total load of 300 tons. Standard penetration test
was conducted on the site. Test results were corrected for over burden pressure and
corrected N-values are listed as shown.
Determine the maximum settlement.
Settlements of Loads on Sand (SPT)
29
Smar =
2B
), maximum settlement on dry sand in inches
Njowest
1+B.
29
2B
) , if the ground water table is located at a depth below the
Njowest
Smax =Xe
1+B
base of the footing less than the half the footings width (B/2).
XB = Pa/Pw
Pa = effective overburden pressure at a depth B/2 below the footings base, assuming
the water table is not present
Pw = effective overburden pressure at the same depth with water table present
q = applied pressure in tons/ft?
B = in feet
Depth (m)
Corrected N-values
4.0
40
6.0
42
8.0
44
10.0
36
120
39
14.0
36
16.0
36
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