A natural soil deposit is to be used for a geotechnical engineering project. Laboratory test results indicate that the soil possesses liquid and plastic limits of LL = 30% and PL = 22%, respectively. In addition, the sieve analysis has produced the following information: • % Passing Sieve No. 4 (4.75 mm) % Passing Sieve No. 200 (75 μm) • Coefficient of Uniformity C₁ 100% 8% 1.590 0.012 Coefficient of Curvature Co (a) Determine the soil's classification in accordance with the Unified Soil Classification System (USCS). (b) To further improve the soil's shear strength performance, the natural soil deposit (possessing an in- situ water content of w = 14%) was compacted in-situ and has achieved a saturation degree of S = 85%. If the specific gravity of soil solids is G, = 2.6, determine the soil's dry and bulk unit weights (ya and y) in its current compacted state.
A natural soil deposit is to be used for a geotechnical engineering project. Laboratory test results indicate that the soil possesses liquid and plastic limits of LL = 30% and PL = 22%, respectively. In addition, the sieve analysis has produced the following information: • % Passing Sieve No. 4 (4.75 mm) % Passing Sieve No. 200 (75 μm) • Coefficient of Uniformity C₁ 100% 8% 1.590 0.012 Coefficient of Curvature Co (a) Determine the soil's classification in accordance with the Unified Soil Classification System (USCS). (b) To further improve the soil's shear strength performance, the natural soil deposit (possessing an in- situ water content of w = 14%) was compacted in-situ and has achieved a saturation degree of S = 85%. If the specific gravity of soil solids is G, = 2.6, determine the soil's dry and bulk unit weights (ya and y) in its current compacted state.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:A natural soil deposit is to be used for a geotechnical engineering project. Laboratory test results indicate
that the soil possesses liquid and plastic limits of LL = 30% and PL = 22%, respectively. In addition, the
sieve analysis has produced the following information:
•
% Passing Sieve No. 4 (4.75 mm)
% Passing Sieve No. 200 (75 μm)
•
Coefficient of Uniformity C₁
100%
8%
1.590
0.012
Coefficient of Curvature Co
(a) Determine the soil's classification in accordance with the Unified Soil Classification System (USCS).
(b) To further improve the soil's shear strength performance, the natural soil deposit (possessing an in-
situ water content of w = 14%) was compacted in-situ and has achieved a saturation degree of S =
85%. If the specific gravity of soil solids is G, = 2.6, determine the soil's dry and bulk unit weights (ya
and y) in its current compacted state.
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