Question

A soil deposit has a unit weight of 120 pcf above the groundwater and 128pcf below the groundwater. It has an undrained shear strength (Su) of 500psf, effective cohession (c') of 200psf, and effective friction angle (φ') of 31 degrees and extends to a great depth. the groundwater table is at 15 ft below ground surface

A) What is the short term (undrained) shear strength of the soil at a depth of 30ft below ground surface?

Answer #1

A soil deposit has a unit weight of 120 pcf above the
groundwater and 128pcf below the groundwater. It has an undrained
shear strength (Su) of 500psf, effective cohession (c') of 200psf,
and effective friction angle (φ') of 31 degrees and extends to a
great depth. the groundwater table is at 15 ft below ground
surface
A) What is the short term (undrained) shear strength of the soil
at a depth of 30ft below ground surface?

The site you are investigating in Beaufort, SC, has soft clay
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the existing ground surface to a depth of 5 ft, while the sand
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Underlying the sand deposit is the Cooper Marl Formation. The
groundwater table is located 2 ft below the ground surface. You
have determined that the proposed structure will need to be...

A 10 ft wall retains soil with a horizontal surface that has 115
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what is the total horizontal thrust that the wall feels

Calculate the total overburden stress, pore water pressure, and
effective overburden stress at a depth of 12 feet for the given
soil profile. A 2 ft sand layer with total unit weight of 107 pcf
that is overlaying a 14 ft deep saturated clay layer with a total
unit weight of 118 pcf, sitting on the bedrock. The groundwater
table is 2 ft below the ground surface.

Determine the allowable design load for a column resting on a
rectangular footing 2 m by 9 m, buried to a depth of 2 m in clay
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table is at the ground surface and use a factor of safety of 3.
Provide your answer in kN as a...

Determine the total force per unit length acting on a 4.8 m high
retaining wall. The soil that is backfilled level behind the wall
is a granular soil with a total unit weight of 18.2
kN/m3 and a saturated unit weight of 19.6
kN/m3. Use an at-rest earth pressure coefficient for the
soil which has an internal angle of friction of 26 degrees. The
water table is expected to rest at a depth of 1.5 below the ground
surface. Report...

QUESTION 2 A square footing has to be designed using Terzaghi's
bearing capacity equation on a soil with these given parameters:
unit weight =115 lb/ft? effective angle of internal friction = 30°,
effective cohesion = 500 lb/ft, factor of safety = 3. The bottom of
the footing is located at 5 ft below the ground surface. The ground
water table is far below the bottom of the footing and has no
impact on soil bearing capacity. What is the minimum...

A wall is supported on a 1.0 m wide strip footing located 1.5 m
below the ground surface. The surrounding soil has a dry unit
weight of 17.5 kN/m3, a saturated unit weight of 19.0 kN/m3,
cohesion of 8 kPa and angle of internal friction of 26°.
Groundwater was located 2m below ground surface. Using a factor of
safety of 3, determine the allowable bearing capacity if a) the
footing is considered infinitely long, and b) the footing is 8...

a five meter retaining wall has to retain backfill of sandy soil
having a unit weight 18.2 kn/m3 and angle of internal friction 32
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application of the active thrust on the wall,draw a diagram of
given situation ,and determine total active earth pressure acting
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b)
A sample of moist soil has a mass of 18.18kg and occupies a
total volume of 0.009 m3. When dried in an oven, the dry
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Wet density
Dry unit weight
Void ratio
Water content
Degree of saturation
c)
A 4.5 m deep deposit of silty sand lies above a 6 m deep deposit
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