PROBLEM #$1(60$ Points$)$:

You are a staff engineer for a geotechnical engineering firm. As part of the geotechnical

exploration for a project, several subsurface tests have been conducted. The general soil

profile encountered at the site, along with moist and saturated soil unit weights, is

summarized in Table $1.$ The groundwater table was encountered at $6$ ft from the existing

ground surface.

Table $1.$ Summary of Soil Stratigraphy.

NOTES:

Depth from existing ground surface to the bottom of the soil layer.

Determine the total, pore pressure, and effective stresses in the soils from the ground

surface to the bottom of the deepest subsurface test $($i$.$e$.$ a depth of $80$ ft $).$ Provide a plot

of these stresses with depth relative to the soil profile as detailed in class.

PROBLEM #$2(10$ Points$)$:

You have just learned that a hydraulic gradient of $0\mathrm{.}10$ upwards exists at your project site.

Using this information, recalculate the effective stresses from the ground surface to the

bottom of the deepest subsurface test $($i$.$e$.$ a depth of $80$ ft $).$ Plot these effective stresses

with depth. Briefly explain the effect of the upward water seepage on the effective stress

compared to the static conditions.