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Following figure shows the layout plan of columns of a building. Design a raft foundation for the building. Take net bearing capacity = 80kn/m3. Each corner column carries a load of 700 kN.
written 5.3 years ago by gravatar for teamques10 teamques10 ★ 65k •   modified 4.0 years ago

Central columns carry load of 1000 kN. Draw neat sketch showing reinforcement details.

enter image description here
reinforced concrete structures design and drawing
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written 5.1 years ago by gravatar for teamques10 teamques10 ★ 65k •   modified 5.1 years ago

Solution:

1) Calculation of upward pressure

$w =\frac {P}{A}$

= $\frac {Total \ Load}{Area \ of \ raft}$

= $\frac{700 \times 4 + 1000 \times 2}{8 \times 4}$

= $150 \ kN /m^2 $ $\gt 80 \ kN /m^2$

$\therefore$ Rt is not safe

2) Area of raft

Area of …

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