Two footings, rest in layer of sand 3m thick. The bottom of the footings is 1m above the ground surface. Beneath the sand layer is a 2m clay layer. Beneath the clay is Bedrock. The water table is at a depth of 2m below the ground surface. a. Compute the stress increase at the center of clay layer with respect to footing A in kPa. Assume that the pressure beneath the footing at A is spread at an angle of 2 Vertical is to 1 Horizontal. b. Determine the size of Square Footing B so that the settlement in the clay layer is the same beneath footings A and B.
Two footings, rest in layer of sand 3m thick. The bottom of the footings is 1m above the ground surface. Beneath the sand layer is a 2m clay layer. Beneath the clay is Bedrock. The water table is at a depth of 2m below the ground surface. a. Compute the stress increase at the center of clay layer with respect to footing A in kPa. Assume that the pressure beneath the footing at A is spread at an angle of 2 Vertical is to 1 Horizontal. b. Determine the size of Square Footing B so that the settlement in the clay layer is the same beneath footings A and B.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Two footings, rest in layer of sand 3m thick. The bottom of the footings is 1m above the ground surface. Beneath the sand layer is a 2m clay layer. Beneath the clay is Bedrock. The water table is at a depth of 2m below the ground surface.
a. Compute the stress increase at the center of clay layer with respect to footing A in kPa. Assume that the pressure beneath the footing at A is spread at an angle of 2 Vertical is to 1 Horizontal.
b. Determine the size of Square Footing B so that the settlement in the clay layer is the same beneath footings A and B.
Transcribed Image Text:hl
G
450 KN
Ground Surface
1.50M X 1.50 M footing
CLAY
SAND
yd-18 kN cum
WT
yat-21 kN cum
yat-19 kN/cum
900 KN
Cc-0.20%
w-40%
Gs-2.68
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