Question
In: Civil Engineering
The soil profile at a site consists of a clay layer 10 m thick, sandwich between...
The soil profile at a site consists of a clay layer 10 m thick, sandwich between two sand layers. The top sand layer has a density of 1.9 Mg/m3 and is 5 m thick. Below this layer is a 10 m thick clay layer with a saturated density of 1.8 Mg/m3 and a saturated water content 42%. The deeper sand layer has a saturated density of 1.9 Mg/m3 and extend to the depth investigated at the site. The water table was detected at the top of the clay layer.
The results of a consolidation test performed on a sample recovered from the mid point of the clay layer indicated the following properties for the clay:
Effective pre-consolidation pressure of 130 kPa;
Compression index Cc = 0.40;
Re-compression index Cr = 0.03; and
Consolidation coefficient Cv = 0.544 * 10-2 cm2/sec.
The site is being proposed to be graded by compacting an additional layer.
The new compacted layer will impose a total stress increment of 75 kPa on the present ground surface. It is desired to obtain the following information:
Estimate the ultimate consolidation settlement due to grading;
Estimate the time in weeks that it will take to reach the average degree of consolidation Uave = 90%; and
At the time calculated in 2.), estimate the excess pore pressure still present at the mid-point of the clay layer.
Solutions
Ally Wells answered 11 months agoRelated Solutions
The soil profile at a site consists of a clay layer 10 m thick, sandwich between...
The soil profile at a site consists of a clay layer 10 m thick,
sandwich between two sand layers. The top sand layer has a density
of 1.9 Mg/m3 and is 5 m thick. Below this layer is a 10
m thick clay layer with a saturated density of 1.8 Mg/m3
and a saturated water content 42%. The deeper sand layer has a
saturated density of 1.9 Mg/m3 and extend to the depth
investigated at the site. The water table...
The soil profile at a site consists of a clay layer 10 m thick, sandwich between...
The soil profile at a site consists of a clay layer 10 m thick,
sandwich between two sand layers. The top sand layer has a density
of 1.9 Mg/m3 and is 5 m thick. Below this layer is a 10
m thick clay layer with a saturated density of 1.8 Mg/m3
and a saturated water content 42%. The deeper sand layer has a
saturated density of 1.9 Mg/m3 and extend to the depth
investigated at the site. The water table...
Problem No. 1 The soil profile at a site consists of a top 4 m layer...
Problem No. 1 The soil profile at a site consists of a
top 4 m layer of dense sand followed by 2 m of clay, which is
underlain by a stiff stratum. The water table is at 2 m below the
ground level. The follow- ing data was obtained from a
consolidation test on an undisturbed sample obtained from the
middle of the clay layer: water content 36%, specific gravity of
the clay grains = 2.72, compression index = 0.72,...
(a) At a reclamation site, a 6-m thick sand layer overlies a 5.8-m thick clay layer,...
(a)
At a reclamation site, a 6-m thick sand layer overlies a 5.8-m
thick clay layer, which is underlain by impermeable rock stratum.
The water level is initially 2.5 m above the ground surface. The
saturated unit weights of sand and clay are 19 kN/m3 and 17 kN/m3,
respectively. A 5-m thick layer of fill will be placed on the
original ground surface, and the unit weights of fill are 19 kN/m3
and 20 kN/m3 above and below water table,...
A 20 m thick saturated clay layer is normally consolidated. At mid-depth in this layer, the...
A 20 m thick saturated clay layer is normally consolidated. At
mid-depth in this layer, the void ratio (e) is 1.110, the
coefficient of compressibility (av) is 5.74 x103 cm2=N.
Recall that w = 9.81 kN/m3. a) Assuming that a 122 cm lowering of
the ground water table (GWT) occurs in the soil overlying the clay
layer, what settlement will occur in the soil overlying the clay
layer because of the ultimate primary consolidation of the clay
layer? Express your...
A clay layer in field is 3-m thick and is sandwiched between two sand layers (drained...
A clay layer in field is 3-m thick and is sandwiched between two
sand layers (drained from top and bottom). The saturated stratum of
clay is under a surcharge loading and underwent 90% primary
consolidation in 75 days. The time required in minutes for a 30 mm
thick undisturbed clay sample obtained from the field to undergo
90% consolidation in laboratory is most nearly equal to
Select one:
a. 28
b. 67.5
c. 100
d. 10
A 10 m wide road is to be constructed across a site where the soil profile...
A 10 m wide road is to be constructed across a site where the
soil profile consists of 3 m of sand, overlying 1 m of peat, over a
deep sand deposit. The water table is 1 m below the soil surface.
The road pavement applies a uniform stress of 20 kPa to the
underlying soil. The peat is lightly over-consolidated with an
over-consolidation ratio of 1.25, has a uniform void ratio, e =
2.0, a re-compression index, Cr =...
The clay layer of 6 m thick is located under the gravel ground of 12 m...
The clay layer of 6 m thick is located under the gravel ground of 12 m thick. The water table lies 4m below the ground surface. It is because the bag is 0.30 for dry gravel floor, the dry unit volume weight is 16.2 kN / m3, the undrained shear strength for clay floor is 20 kPa, 24o for friction and 17.6 kN / m3 for saturated unit volume. According to doing; Based on the shear strength of the ground...
A layer of soft, normally consolidated clay is 15 m thick and lies under a newly...
A layer of soft, normally consolidated clay is 15 m thick and
lies under a newly constructed building. The overburden pressure of
the sand overlying the clay layer is 500 kN/m2 and the new
construction increases it by 180 kN/m2. If the compression index is
0.25 and the recompression index is 0.015, compute the settlement
of the building. The water content of the clay is 30%, the specific
gravity of the soil grains is 2.7, and the clay is fully...
A tank holds a 1.44-m thick layer of oil that floats on a 0.96-m thick layer...
A tank holds a 1.44-m thick layer of oil that floats on a 0.96-m
thick layer of brine. Both liquids are clear and do not intermix.
Point O is at the bottom of the tank, on a vertical axis.
The indices of refraction of the oil and the brine are 1.40 and
1.52, respectively. A ray originating at O crosses the
brine-oil interface at a point 0.5 m from the axis. The ray
continues and emerges into the air above...
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- Example #2: Write the following set of four linear equations with 4 unknowns x1, x2, x3,...
- "In the digital age, our personal and collective privacy is threatened like it never has been...
- when i type those python code below, i got True, but when i type not a...
- Assume sales for Peach Street Industries are expected to increase by 8.00% from 2015 to 2016....
- Merrimac Manufacturing has always purchased a certain component part from a supplier on the East Coast...
- Your firm designs training materials for computer training classes, and you have just received a request...
- We are evaluating a project that costs $856,000, has a life of 9 years, and has...
ADVERTISEMENT