A 2m x 3m footing constructed on a sand deposit (as shown in the Figure below) is subjected to centric vertical loading at a depth of 1.5m below the ground surface. Energy-corrected SPT Noo values from the field are given below. Assume c' = 0, y = 18.5 kN/m, Vat = 19.5 kN/m, %3D Assuming Factor of Safety = 3, compare the gross allowable load for the following scenarios. (a) When the ground water table is located at the ground surface. (b) When the ground water table is located 0.5 m below the ground surface. (c) When the ground water table is located at the base of the footing. (d) When the ground water table is located 1m below the base of the footing. (e) When the ground water table is located 5 m below the base of the footing. Ground water D able Casel D Casell Yaturated unit weight Depth (m) Neo 1.5 3.0 4.5 6.0 10 7.5 10 9.0
A 2m x 3m footing constructed on a sand deposit (as shown in the Figure below) is subjected to centric vertical loading at a depth of 1.5m below the ground surface. Energy-corrected SPT Noo values from the field are given below. Assume c' = 0, y = 18.5 kN/m, Vat = 19.5 kN/m, %3D Assuming Factor of Safety = 3, compare the gross allowable load for the following scenarios. (a) When the ground water table is located at the ground surface. (b) When the ground water table is located 0.5 m below the ground surface. (c) When the ground water table is located at the base of the footing. (d) When the ground water table is located 1m below the base of the footing. (e) When the ground water table is located 5 m below the base of the footing. Ground water D able Casel D Casell Yaturated unit weight Depth (m) Neo 1.5 3.0 4.5 6.0 10 7.5 10 9.0
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:A 2m x 3m footing constructed on a sand deposit (as shown in the Figure below)
is subjected to centric vertical loading at a depth of 1.5m below the ground surface.
Energy-corrected SPT Noo values from the field are given below. Assume c' = 0, y
= 18.5 kN/m, Vat = 19.5 kN/m,
%3D
Assuming Factor of Safety = 3, compare the gross allowable load for the following
scenarios.
(a) When the ground water table is located at the ground surface.
(b) When the ground water table is located 0.5 m below the ground surface.
(c) When the ground water table is located at the base of the footing.
(d) When the ground water table is located 1m below the base of the footing.
(e) When the ground water table is located 5 m below the base of the footing.
Ground water
D
able
Casel
D
Casell
Yaturated
unit weight
Depth (m)
Neo
1.5
3.0
4.5
6.0
10
7.5
10
9.0
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