Question
Download Solution PDFThe gross bearing capacity of a strip footing 1.5 m wide located at a depth of 1.2 m in clay is 420 kN/m2. If the unit weight of the soil is 20 kN/m3, estimate the net bearing capacity in kN/m2 units.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
Gross pressure (qg)
- It is the total pressure generated at the base of foundation due to self-weight of overlying soil and applied loads.
- \(q_g=\frac{P}{B^2}+\gamma D_f\)
Net bearing capcity (qn)
- It is the loading intensity at the base of footing in excess of loading intensity that was originally subjected to \(\gamma D_f\).
- \(q_n=q_g-\gamma D_f\)
Calculations:
Given: qg = 420 kN/m2, \(\gamma=20kN/m^3\), \(D_f=1.2m\)
\(q_n=q_g-\gamma D_f\)
\(q_n=420-20\times1.2=396kN/m^2\)
Last updated on May 28, 2025
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