Question
In: Civil Engineering
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, recompression index = 0.07, preconsolidation pressure = 85 kPa. The bulk and saturated unit weights of the sand are 17 kN/m' and 18.5 kN/m' respectively. The ground level was raised by placing 2 m of compacted fill with a unit weight of 20 kN/m'. Estimate the final consolidation settlement. It is proposed to construct a warehouse covering a large area on top of the raised ground, which is expected to impose a pressure of 25 kPa. What would be the additional consolida- tion settlement?
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...
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...
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 =...
For the soil profile shown in the figure above of Problem 4, when the water table elevation is raised to the top of the ground surface:
For the soil profile shown in the figure above of Problem 4, when the water table elevation is raised to the top of the ground surface:(a) What is the change in the effective stress at Point A?(b) What will be the consequence of the effective stress change?Assume that the total unit weight of the top soil below the water table will increase 5% from its moist unit weight after raising the water table.
: To determine the soil profile/layers in a site, as an engineer which all types of...
: To determine the soil profile/layers in a site, as an engineer
which all types of soil exploration method will you suggest? Also,
how the details of soil exploration are made used to find the soil
bearing capacity of the construction site.
A 300 kN point load is applied to a soil profile that consists of 7 meters...
A 300 kN point load is applied to a soil profile that consists
of 7 meters of sand (γt = 19 kN/m3) above 4 meters of clay (γt =
17.5kN/m3) with the groundwater table at a depth of 5 meters. The
clay has an OCR = 1.6, an initial void ratio of 0.86, a Cc=0.64 and
a Cr=0.12. The sand has a Cc = 0.35 and an initial void ratio of
0.68. Calculate the overall settlement of the profile due...
5)A soil profile includes all of the following EXCEPT; a)Hot liquid magma b)Top soil and organic...
5)A soil profile includes all of the following EXCEPT;
a)Hot liquid magma
b)Top soil and organic layer
c)Weathered and parent rock
d)Subsoil
6)People have made land more vulnerable to erosion through the
following;
a)Clearing forests on steep slopes or with large clear cut
areas.
b)Overgrazing rangeland with more livestock than the land can
support.
c)All of the above.
d)Overcultivating fields through poor planning or excessive
tilling.
7)The following is true concerning the rotation of crops in a
field;
a)Only A....
(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,...
You are conducting a geotechnical analysis on a 3-layer soil system. Layer 1 is a 5-ft...
You are conducting a geotechnical analysis on a 3-layer soil
system. Layer 1 is a 5-ft sand with dry unit weight of 100 pcf.
Layer 2 is a 6-ft silty sand with a saturated unit weight of 115
pcf. Layer 3 is a 15-ft low plasticity clay with a saturated unit
weight of 117 pcf. There is an unknown granular soil below the clay
layer. The ground water table is at a depth of 5 ft. A structural
footing with...
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