Question # $5$

$(25$ marks$)$

A square pile having a dimension of $0\mathrm{.}26m0\mathrm{.}26m$ is driven into clay soil for a depth of $8\mathrm{.}5m.$ The clay has undrained shear strength of $34$kPa, angle of friction of $28$ degrees, saturated unit weight of $18k\frac{N}{m^3},$ and OCR of $2.$ If the groundwater is at the ground level, find out if the pile is okay to carry a load of $65kN.$ What if I do not want to account for the toe bearing can the pile carry the applied load? Suggest any recommendations? $($Use a factor of safety of $2\mathrm{.}5).$

ANS: Qallow $=68\mathrm{.}73kN,Q$ allow $=87\mathrm{.}69,Q$ allow without toe bearing

The answer is prvided please show all steps to obtain the answers. Formula sheet also prvided