2. A soil sample was tested in the laboratory and the following grain size analysis results
were obtained:
Sieve No. Sieve Opening Percent coarser by
_ _ .t.l_nm)_. . weight. (1%.)
4 4.?5 0
10 2.00 6.]
| 20 0.85 12.0
I 40 0.425 40.?
60 0.2

CE 360 Engineering Properties of Soils
Homework No. 2
1. For the data given below, classify the soil according to the USCS. For each soil you
should give both the letter symbol and the narrative description of the soil.
a) 58% material retained on No. 4 s

l. The total volume ul‘ :I snil specimen is I2“I um" and its total muss is 220 g. Specimen
pﬂt‘llﬁily is (1.4 and speciﬁc grawily nl' sulids is 2.66. Determine the “allowing: [a]
water cunt-c111. {h} void ratio. {c} degree ui‘sulurutinn. and {d} dry densi

CE 360 Engineering Properties of Soils
Homework No. 1
1. The total volume of a soil specimen is 120 cm3 and its total mass is 220 g. Specimen
porosity is 0.4 and specific gravity of solids is 2.66. Determine the following: (a)
water content, (b) void rati

CE 360 Engineering Properties of Soil Professor: Arvin Farid April 06, 2015
Exam 2 Closed Notes and Book 4.30 PM to 5.45 PM
Name: Student ID: Page 1 of6
0 Write your name and student ID on top of every page. Pages without name and student ID
will not be g

1'33 ' ’ 3 ( %) Question 1: A drainage pipe (Figure Pl) became completely clogged during a storm by a plug of
sand with a length of31.5 m and another plug of a mixture of clay, silt, and sand with a length of G5 m.
When the storm was over, the water level

Question 1 (51%): In Figure Pl below. the cross-sectional area ofthe soil is 100 cm}. and the length
of‘the soil is 25 cm. Porosity ol'thc soil is 0.45.
A constant-head test is run twice: once without and then once with the air prsssurl: of 20 We
applied

CE 360 Engineering Properties of Soil Professor: Arvin Far-id April. 16, 2014
Exam 2 Closed Notes and Book 4.30 PM to 5.45 PM
Name: Student ID: Page 1 of?
0 Include all your calculations. Final answers without the calculation procedure receive
minimal cre

1. For the soil elements in Figures 2:1 and 21:, ﬁnd the state of stress on horizontal plane,
and principle stresses as well as their corresponding principle planes.
0 3. For the element shown in the ﬁgure:
3. Find the magnitude of the unknown stresses on

CE 360
Homework #1 Solutions
1.
The total volume of a soil specimen is 120 cm3 and its total mass is 220 g.
Specimen porosity is 0.4 and specific gravity of solids is 2.66. Determine the
following:
a.
water content
b.
void ratio
c.
degree of saturation
d.

CE 360
Homework #5 Solutions
Figure P1 shows a constant head permeability test, which waas performed on
a layered soil. The two soils are marked soil A and soil B. At the interface
between the two soils, the pressure head was measured and found to be
hp=1

CE 360
Solution to HW #2
Problem # 2
Problem # 3
Problem # 4
Sample A
82% larger then No.200 sieve>50%
Coarse-grained Soil
23%larger than No.4 sieve<(82/2)=41%
Sand
12%<18% pass No.200 sieve
LL=32, PI=32-25=7, Plasticity chart
Below A-line
SM
Sample B
45%

CE 360
Homework #7 Solutions
1.
The time factor for a doubly drained clay layer undergoing consolidation I is
0.2.
a.
What is the degree of consolidation (Uz) at z/H =0.125, 0.25 and 0.375?
Z=z/Hdr=2z/H
Uz
b.
0.25
70%
0.5
44%
0.75
29%
If the final consoli

CE 360
Homework #4 Solutions
1.
For soil with grain-size distribution curve marked No. 1 in Figure P1,
compute the capillary pressure uc (in kPa) and the theoretical height of
capillary rise in meters.
Determine D10 from curve, interpolate between 0.001 &

CE 360
Homework #6 Solutions
1.
A consolidation test on a sample of clay produced the following data:
'v (kPa)
8
16
32
64
128
256
512
1024
16
v (%)
3.2
4.1
5.1
6.9
10.9
17.3
24
30.1
22
The initial void ratio was 1.21 and vo at the sample depth was 40 kPa.

Homework #3 Solutions
Soil from borrow site: w = 26%, Gs = 2.65, d = 105 pcf @ optimum w = 20%
95% Relative compaction required
a. Draw the zero air voids curve (ZAVC) for the fill soil:
S w
1 62.4 pcf
d
use spreadshee t to plot ZAVC
S
1
w
w
Gs
2.65
Hw

CE 360
Homework #8 Solutions
(50,10)
(25,-10)
(20,10)
(40,10)
tan
ff 4100
36.21o
ff 5600
o
Triaxial Loading f 45o
2
63.1o
1 3
3
2
1
Sin C
3 1 3
1
tan
2
Granualr Soil : C 0
ff
2 ff
Cos
C
3 1 3
1
tan
2
1 3 10162.89
1 3 Sin Sin36.21o 17203