Neco 2023 Geography Question 23
Practice objective / multiple choice question 23 from the 2023 Neco Geography examination.
A rectangular foundation measuring \(4\) m × \(6\) m rests on a clay layer \(5\) m thick. The clay has a compression index \(C_c = 0.25\), initial void ratio \(e_0 = 0.9\) and a pre‑consolidation pressure of \(150\) kPa. The effective stress increase at the centre of the foundation due to the imposed load is \(120\) kPa. The coefficient of consolidation for the clay is \(C_v = 2 \times 10^{-6}\) m\(^2\)/s and drainage occurs only at the base of the layer. (a) Calculate the primary consolidation settlement of the foundation (in mm). (b) Estimate the time required to achieve \(90\%\) consolidation (in days).
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About This Question
This is Neco 2023 Geography Question 23. It is one of the objective questions from the 2023 Neco Geography examination.
Difficulty level: Medium .
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