Q6) A foundation 3.5 m square is to be constructed at a depth of 1.2 m in a deep sand deposit, the water table being 3.0 m below the surface. The following uncorrected values of standard penetration resistance were determined at the location: Depth Nield 0.70 6 1.35 9 2.20 10 2.95 8 3.65 12 4.40 13 5.15 17 6.00 23 The saturated unit weight of the sand is 20 kN/m³ and the unit weight above the water table is 17 kN/m³. The shear strength parameters are c'= 0 and Ø' 28". If the settlement is not to exceed 25 mm, determine the allowable bearing capacity according to the following design procedures: (a) Terzaghi expression (1943), (b) Meyerhof (1956), (c) Burland, Broms and De Mello (1977), (d) Peck, Hanson and Thornburn (1974).
Q6) A foundation 3.5 m square is to be constructed at a depth of 1.2 m in a deep sand deposit, the water table being 3.0 m below the surface. The following uncorrected values of standard penetration resistance were determined at the location: Depth Nield 0.70 6 1.35 9 2.20 10 2.95 8 3.65 12 4.40 13 5.15 17 6.00 23 The saturated unit weight of the sand is 20 kN/m³ and the unit weight above the water table is 17 kN/m³. The shear strength parameters are c'= 0 and Ø' 28". If the settlement is not to exceed 25 mm, determine the allowable bearing capacity according to the following design procedures: (a) Terzaghi expression (1943), (b) Meyerhof (1956), (c) Burland, Broms and De Mello (1977), (d) Peck, Hanson and Thornburn (1974).
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:Q6) A foundation 3.5 m square is to be constructed at a depth of 1.2 m in a deep sand
deposit, the water table being 3.0 m below the surface. The following uncorrected values of
standard penetration resistance were determined at the location:
Depth
(m)
Nfield
0.70
1.35
6
2.20
9
2.95
8
4.40
13
The saturated unit weight of the sand is 20 kN/m³ and the unit weight above the water table is
17 kN/m³. The shear strength parameters are c'= 0 and ع= 28". If the settlement is not to
exceed 25 mm, determine the allowable bearing capacity according to the following design
procedures: (a) Terzaghi expression (1943), (b) Meyerhof (1956), (c) Burland, Broms and De
Mello (1977), (d) Peck, Hanson and Thornburn (1974).
10
3.65
12
5.15
6.00
17
23
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