Republic of the Philippines
SULTAN KUDARAT STATE UNIVERSITY
Isulan, Sultan Kudarat
College of Engineering
First Semester S.Y. 2022 โ 2023
1. A soil specimen has a volume of 0.05 m3 and mass of 87.5 kg. Given
๐ค = 15% ๐บ๐ = 2.68 . Determine (a) Void ratio (b) Porosity (c) dry unit weight (d)
Moist unit weight (e) Degree of saturation.
2. The saturated unit weight of a soil is 20.1 kN/m3 at a moisture content of 22%.
Determine (a) the dry unit weight and (b) the specific gravity of soil solids, ๐บ๐ .
3. For granular soil, given: ๐พ = 116.64 ๐๐/๐๐ก3, ๐ท๐=82%, ๐ค = 8%,๐๐๐ ๐บ๐ = 2.65. For
this soil, if ๐๐๐๐ = 0.44, what would be the
๐๐๐๐ฅ = 0.44? What would be the dry unit weight
in the loosest state?
4. For the figure shown, determine the total stress,
pore water pressure, and effective stress at A,
B, C, and D.
5. For normally consolidated clay layer, given:
Thickness = 3.7 m, Void ratio = 0.82, Liquid limit
= 42, and Average stress on the clay layer =
110 kN/m2.How much consolidation settlement
would the clay undergo if the average effective
stress on the clay layer is increased to 155 kN/m2 as the result of the construction
of a foundation.
6. Refer to the soil profile shown in the figure above. The clay is normally
consolidated. A laboratory test on the clay gave the
results given in the table shown:
If the average effective stress on the clay layer
increase by 50. a. What would be the total
consolidation settlement? b. If ๐ถ๐ฃ= 9.36 ร10โ4 ๐๐2/๐ ๐๐, how long will it take for
half the consolidation settlement to take place?
7. A consolidated-drained triaxial test on a sand yields the results: All-around
confining pressure = ๐3=30 ๐๐/๐๐2, Added axial stress at failure = ฮ๐ = 96 ๐๐/๐๐2.
Determine the shear stress parameters (i.e., ๐โฒ ๐๐๐ ๐โฒ)
8. A consolidated-drained triaxial test on a normally consolidated clay yielded a
friction angle,๐โฒ, of 28ยฐ. If the all-around confining pressure during the test was
140 kN/m2, what was the major principal stress at failure?
9. A consolidated-undrained triaxial test was conducted on a saturated, normally
consolidated clay. The test results are ๐3=13 ๐๐/๐๐2, ๐1(๐๐๐๐๐ข๐๐) =32 ๐๐/๐๐2, and
Pore pressure at failure = ๐ข = 5.5 ๐๐/๐๐2 Determine c, ๐, ๐โฒ, and ๐โฒ.
10. For a normally consolidated clay, given ๐โฒ=28ยฐ, and ๐ = 20ยฐ. If a consolidated-
undrained triaxial test is conducted on the clay with ๐3=150 ๐๐/๐2, what would
be the pore water pressure at failure?
Name: ______________________________________________ Score: _______________
Crs./Yr./Sec.:_________________________________________ Date: ________________
CEI 422 โ Foundation Engineering
PLATE #1 โ PROBLEM SET
Instructions:
I. Kindly print this sheet and attached as the first page of your plate.
II. Show your solution in an orderly manner and kindly box your final answers.
