Discuss the effect of void ratio, particle size distribution,
and effective stress on soil behaviors (e.g.,...
Discuss the effect of void ratio, particle size distribution,
and effective stress on soil behaviors (e.g., hydraulic
conductivity, deformation and strength) respectively.
when soil has undergone adequate drainage, the effective stress is
better then the total stress for determining potential failure or
settlement of the soil.
true or false
If water is seeping, the effective stress at any point in a soil
mass will be different from the static case. It will decrease or
increase depending on the direction of seepage. With help of
sketches, describe what will happen to effective stress if the
water is seeping downward through a soil layer.
An organic soil, the void ratio e is found to be 10.0 and GS is .2.35 If this soil is fully saturated, find:a. Unit weight of the soilb. water conten w%c. Does this soil sink in water?
A sample of soil was tested; the results were
void ratio e = 1.024
moisture content w = 33.4%
specific gravity of solids Gs = 2.75
Using a phase diagram, determine the following:
a) The soil's bulk, dry and saturated unit weights, and degree of
saturation;
b) The volume of air void in 1m^3 of this soil; and
c) The weight of water required to fully saturate the 1m^3 soil
(Time limited 70mins)
Q.1 A dried soil was subjected to particle size analysis with
the following results:
Results of Sieve analysis
Sieve (mm)
Mass Retained (g)
Mass Retained (%)
Percent Passing (%)
60.000
29.6
MR1
PP1
6.000
13.0
MR2
PP2
2.000
11.6
MR3
PP3
0.600
19.5
MR4
PP4
0.063
11.4
MR5
PP5
Pan
3.7
MR6
PP6
Determine the percentage (%) for gravel (G):
Q.2 Determine the percentage (%) for sand (S):
Q.3 Classify the fine-grained portion of the soil sample...
What is the importance of a Particle Size Distribution
Curve for Soils? What is it used for engineering wise? In addition,
explain fully the Uniformity Coefficient, the Coefficient of
Curvature, the Effective Size, D10, D30, D50, D60.
1) What will happen to the effective population size if
we change the sex ratio from 50% to 90% female? Genetic drift will
increase because
(A)The effective population size will increase
(B) The effective population size stay the same
(C) The effective population size will decrease
(D) The effective population size is unpredictable
2) Which stochastic factor(s) was resulting in the
prairie chicken population in Illinois heading towards extinction
before the translocation of more birds from outside the
state?
A....