Q$.4($b$)$ If a vertical footing load $(q_0)$ of $4000$ kPa is uniformly spread on a rigid footing base as shown in Figure Q$\mathrm{.}4($a$)$ with G$.$W$.$L is $3$ m below ground level.

Figure Q$\mathrm{.}4($b$)$: Value of $,{}_r,{}_{av}$

$($i$)$ Determine the immediate settlement $(S_e)$ for the sand layer due to the footing load by using Figure Q$\mathrm{.}4($b$).$

$(4$ marks$)$

$($ii$)$ Determine the ultimate consolidation settlement $(S_c)$ for the clay layer due to the foundation load.

Note: The increase in effective stress at the middle of the clay layer can be determined using the $2$:$1$ method of load spreading.

$(6$ marks$)$

Geotechnical & Foundation Engineering $($CON$4342)$

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AY $2023/2024$ Semester $7$ Exam $[$EG$524101/$EG$314101]$ PTE & PTD