The gross bearing capacity of a 1.5 m wide strip footing at a depth of 1.0 m is (430kN/m2). If (γ = 20kN/m2), what is the net bearing capacity?a)(410kN/m2)b)(420kN/m2)c)(460kN/m2)d)None of theseCorrect answer is option 'A'. Can you explain this answer?

Question

Answer

Total bearing capacity - (4s)

Net bearing capacity - (4rs)

depth of footing - (D f)

Answer

Total bearing capacity - (4s)

Net bearing capacity - (4rs)

depth of footing - (D f)

Answer

To find the net bearing capacity, we need to subtract the unit weight of soil from the gross bearing capacity.

Given:
Width of strip footing (B) = 1.5 m
Depth of footing (D) = 1.0 m
Gross bearing capacity (qg) = 430 kN/m2
Unit weight of soil (γ) = 20 kN/m2

Net bearing capacity (qn) = Gross bearing capacity (qg) - Unit weight of soil (γ)

Calculation:
qn = 430 kN/m2 - 20 kN/m2

qn = 410 kN/m2

Therefore, the net bearing capacity is 410 kN/m2, which is option A.

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