Q$3.(25$ Pts$)$ A wastewater pipeline passes near a foundation as shown in the figure. This

pipeline is $4m$ below the surface. $200$kPa $($Area ABFE$)$ and $400$kPa $($Area BCDE$)$ pressure

acts on different parts of the foundation as shown in the figure. What is the vertical stress

increase acting on the pipe at point $H$ due to foundation loading?

Q$4.(25$ pts$)$ At $10m$ depth, a silty sand layer was encountered and the Standard Penetration

Test $($SPT$)$ was performed. Blows for the first, second, and third $15cm$ ground penetration

were reported as $4,6,$ and $11,$ respectively. The energy rate of the ram is $50\%.$ The borehore

diameter is $200mm$ and the SPT sampler without liner is used. The rod length from the bottom

of the ram to a depth of $10m$ is $12m.$ Calculate $N_{1,60}$ value. $($GWT is $4m$ below ground

surface and unit weight above and below GWT is $19k\frac{N}{m^3}$ and $20k\frac{N}{m^3}$ respectively$)$

TABLE $3-3$

Factors ${}_i$ For Eq$.(3-3)*$