Foundation Design: Principles and Practices (3rd Edition)
3rd Edition
ISBN: 9780133411898
Author: Donald P. Coduto, William A. Kitch, Man-chu Ronald Yeung
Publisher: PEARSON
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Textbook Question
Chapter 3, Problem 3.2QPP
A certain saturated sand
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Students have asked these similar questions
A certain saturated sand (S = 100,) has a moisture content of 25.1 percent and a specificgravity of solids of 2.68. It also has a maximum index void ratio of 0.84 and a minimum indexvoid ratio of 0.33. Compute its relative density and classify its consistency.
A certain saturated sand (S = 100%) has a moisture content of 27.9% and a specific gravity of solids of 2.61. It also has a maximum index void ratio of 0.90 and a minimum index void ratio of
0.33. Compute its relative density and classify its consistency. (Table on the right)
Solution:
Given the values of mmoisture content, specific gravity and degree of saturation, the void ratio can be estiamted as: e =
Thus the relative density is found to be Dr
=
• According to the table, the soil is classified as
%;
soil.
TABLE 3.3 CONSISTENCY OF COARSE-GRAINED
SOILS AT VARIOUS RELATIVE DENSITIES (data
from Lambe and Whitman, 1969)
Relative Density, D,(%)
0-15
15-35
35-65
65-85
85-100
Classification
Very loose
Loose
Medium denseª
Dense
Very dense
"Lambe and Whitman used the term "medium," but "medium dense" is
better because "medium" usually refers to the particle size distribution.
A sand is comprised of solid constituents that have a density (ps) of 2.68 Mg/m³.
The void ratio, e, of the specimen is 0.58. Compute the following: (a) pa; (b) density when
saturated, psat, and (c) relative density, Dr, using additional information that this soil has a
maximum void ratio, emax, of 0.85 and a minimum void ratio, emin, of 0.43. (include your phase
diagram(s))
(a)
kg/m³ (b)
kg/m³
(c)
Chapter 3 Solutions
Foundation Design: Principles and Practices (3rd Edition)
Ch. 3 - Explain the difference between moisture content...Ch. 3 - A certain saturated sand has a moisture content...Ch. 3 - Consider a soil that is being placed as a fill and...Ch. 3 - A sample of soil has a volume of and a weight of...Ch. 3 - A site is underlain by a soil that has a unit...Ch. 3 - The sub-surface profile at a certain site is shown...Ch. 3 - A vertical load of 300 kN is applied to a area at...Ch. 3 - A vertical load of 20 k is applied to a area at...Ch. 3 - 3m3m footing is to be built on the surface of a 15...Ch. 3 - A 3 ft square footing carries a sustained load of...
Ch. 3 - A 2m thick fill is to be placed on the soil shown...Ch. 3 - Estimate the effective friction angle of the...Ch. 3 - Explain the difference between the drained...Ch. 3 - A soil has c=5 kPa and =32. The effective stress...Ch. 3 - A footing with an embedment of 2 m is embedded in...Ch. 3 - Prob. 3.16QPPCh. 3 - Prob. 3.17QPPCh. 3 - A 9 ft thick fill is to be placed on the soil...
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- The coefficient of permeability of sand at a void ratio of 0.80 is 0.47 mm/s. Estimate the coefficient of permeability of this sand at a void ratio of 0.50.arrow_forwardAn undisturbed sample of fine sand is tested in the laboratory and found to have a dry mass of 4.63 kg, a total volume of 0.00198 m³ and a specific gravity of 2.70. Other laboratory tests are performed to determine the maximum and minimum density of the sand. At the maximum density, it is determined that the void ratio is 0.35 at the minimum density, the void ratio is 0.95. A. Compute the void ratio of the sand. B. Compute the relative density of the undisturbed sample. C. Compute the dry density in Mg/m³.arrow_forwardA sample of uniform sand has a porosity of 43%.From the lab test, the value of the void ratio in theloosest condition is 0.85 and a void ratio of 0.35 inthe densest condition. If the water content is 12%and Gs = 2.7. Determine the following:a) Density indexb) Degree of saturationc) Determine the moist unit weightarrow_forward
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