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A square raft of size 4 m is founded at a depth of 3 m in a cohesive soil having c = 120 kN/m2. The net ultimate bearing capacity of the soil using Terzaghi’s theory will be nearly ___
(Take: γ = 19.5 kN/m2, Nc = 9.6, Nq = 2.7 and Nγ = 1.2)
  • a)
    820 kN/m2
  • b)
    1120.46 kN/m2
  • c)
    1365.24 kN/m2
  • d)
    1634.50 kN/m2
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
A square raft of size 4 m is founded at a depth of 3 m in a cohesive ...
According to Terzaghi’s, ultimate bearing capacity of clayey soil for square footing is given by,
qultimate = 1.3 c Nc + γDNq + 0.4 γBNγ
qnet=1.3cNc+γD(Nq−1)+0.4γBNγ
Nc = 9.6, Nq = 2.7 and Nγ = 1.2
qnet=1.3cNc+γD(Nq−1)+0.4γBNγqnet = 1634.49 kN/m2
∴qnet ≈ 1634.50 kN/m2
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Most Upvoted Answer
A square raft of size 4 m is founded at a depth of 3 m in a cohesive ...
Calculation of Net Ultimate Bearing Capacity using Terzaghi’s Theory:

Given Data:
- Size of square raft (s) = 4 m
- Depth of foundation (Df) = 3 m
- Cohesion of soil (c) = 120 kN/m2
- Unit weight of soil (γ) = 19.5 kN/m2
- Bearing capacity factors: Nc = 9.6, Nq = 2.7, Nγ = 1.2

Calculation:
1. Calculate the effective overburden pressure:
- σ' = γ * Df
- σ' = 19.5 * 3 = 58.5 kN/m2
2. Calculate the net ultimate bearing capacity using Terzaghi’s theory:
- qnu = c*Nc + σ'*Nq + 0.5*s*γ*Nγ
- qnu = 120*9.6 + 58.5*2.7 + 0.5*4*19.5*1.2
- qnu = 1152 + 157.95 + 46.8
- qnu = 1355.75 kN/m2

Therefore, the net ultimate bearing capacity of the soil using Terzaghi’s theory is approximately 1355.75 kN/m2.
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A square raft of size 4 m is founded at a depth of 3 m in a cohesive soil having c = 120 kN/m2. The net ultimate bearing capacity of the soil using Terzaghi’s theory will be nearly ___(Take: γ = 19.5 kN/m2, Nc = 9.6, Nq = 2.7 and Nγ = 1.2)a)820 kN/m2b)1120.46 kN/m2c)1365.24 kN/m2d)1634.50 kN/m2Correct answer is option 'D'. Can you explain this answer?
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A square raft of size 4 m is founded at a depth of 3 m in a cohesive soil having c = 120 kN/m2. The net ultimate bearing capacity of the soil using Terzaghi’s theory will be nearly ___(Take: γ = 19.5 kN/m2, Nc = 9.6, Nq = 2.7 and Nγ = 1.2)a)820 kN/m2b)1120.46 kN/m2c)1365.24 kN/m2d)1634.50 kN/m2Correct answer is option 'D'. Can you explain this answer? for Railways 2024 is part of Railways preparation. The Question and answers have been prepared according to the Railways exam syllabus. Information about A square raft of size 4 m is founded at a depth of 3 m in a cohesive soil having c = 120 kN/m2. The net ultimate bearing capacity of the soil using Terzaghi’s theory will be nearly ___(Take: γ = 19.5 kN/m2, Nc = 9.6, Nq = 2.7 and Nγ = 1.2)a)820 kN/m2b)1120.46 kN/m2c)1365.24 kN/m2d)1634.50 kN/m2Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Railways 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A square raft of size 4 m is founded at a depth of 3 m in a cohesive soil having c = 120 kN/m2. The net ultimate bearing capacity of the soil using Terzaghi’s theory will be nearly ___(Take: γ = 19.5 kN/m2, Nc = 9.6, Nq = 2.7 and Nγ = 1.2)a)820 kN/m2b)1120.46 kN/m2c)1365.24 kN/m2d)1634.50 kN/m2Correct answer is option 'D'. Can you explain this answer?.
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