(a) In a site reclamation project, 2.5 m of graded fill ($\gamma = 22…

Question

(a) In a site reclamation project, 2.5 m of graded fill ($\gamma = 22\ \text{kN}/\text{m}^3$) were laid in compacted layers over an existing layer of silty clay ($\gamma = 18\ \text{kN}/\text{m}^3$) which was 3 m thick. This was underlain by a 2 m thick layer of gravel ($\gamma = 20\ \text{kN}/\text{m}^3$). Assuming that the water table remains at the surface of the silty clay draw the effective stress profiles for cases (i) before fill is placed (ii) after the fill has been placed. 10

(b) Write a note on the factors affecting coefficient of permeability. 10

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