Question $2[28$ marks$]$A preliminary site has been chosen for the construction of a large building. Field investigations have identifiedthe presence of a gravel layer at the surface and two different clays. The soil profile is shown below. An analysisof the potential settlement from the loading of the new building is required. It is assumed that settlement resultingfrom the gravel will be negligible and only settlements from Clay $1$ and Clay $2$ need to be assessed.An oedometer test was carried out on a sample from the middle of the Clay $1$ at $6\mathrm{.}5$ m depth. The in$-$situ verticaleffective stress at this depth was calculated to be $0=84$ kPa. A summary of test results is provided in thefollowing table. The water content at the end of the test at $=250$ kPa was found to be w $=29\mathrm{.}3\%.($kPa$)214284150250$h $($mm$)19\mathrm{.}519\mathrm{.}3219\mathrm{.}1418\mathrm{.}3317\mathrm{.}6$a$)$ Calculate the final void ratio at $=250$ kPa. Assume Gs $=2\mathrm{.}75.$b$)$ Calculate the void ratio at each step in the oedometer test and provide your answers in a table. You mayuse Excel $($or equivalent$)$ for this part but you must show hand calculations for at least one loading step.c$)$ Plot void ratio against from the oedometer test using the graph template provided below. Also drawand label the NCL and URL.d$)$ Based on the oedometer test results, what is the in$-$situ preconsolidation pressure and correspondingvoid ratio?e$)$ Calculate and $0$ using the two end points of the NCL and and $0$ using the two end points of theURL.f$)$ Estimate the settlement of Clay $1$ resulting from the load of the new building assuming it provides asurcharge load of $=66$ kPa at the ground surface. Consider Clay $1$ as a single $3$ m layer.g$)$ An oedometer test was also carried out on a sample from the middle of Clay $2$ at $10$ m depth where thein$-$situ vertical effective stress was calculated to be $0=110$ kPa. Clay $2$ was found to beoverconsolidated with an OCR of $1\mathrm{.}4.$ The NCL and URL parameters are provided: