Principles of Geotechnical Engineering (MindTap Course List)
9th Edition
ISBN: 9781305970939
Author: Braja M. Das, Khaled Sobhan
Publisher: Cengage Learning
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Chapter 6, Problem 6.2P
To determine
Calculate and plot the variation of dry density at various water contents and the various degree of saturation.
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Soil Mechanics
(1) For a soil, the following are given: Specific gravity = 2.67, moist unit weight = 17.6 kN/m³, water
unit weight = 9.81 kN/m3 and moisture content = 12 %. Determine
(a) Dry unit weight,
(b) Void ratio,
(c) Porosity,
(d) Degree of saturation
13. A soil has a specific gravity of solids (Gs) of 2.65, a water content of 13% and a void
ratio of 0.8.
a. draw the phase diagram and fill it in with the numerical values
b. determine the porosity, saturation, and the dry, saturated, and submerged unit
weights in lb/ft³.
using
Gs= Ms
me
4.For a given soil, Gs = 2.74 and moist unit weight is 20.6kN/m3, and moisture content of 16.6%. a. Determine the dry unit weight of soil. b. Determine the degree of saturation of the soil. c. Determine the volume of water to be added per cubic meter of soil for the soil to be saturated.
Chapter 6 Solutions
Principles of Geotechnical Engineering (MindTap Course List)
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.Similar questions
- A permeameter tube (square cross-section) is filled with layers of soil of different permeability as shown below. Find the equivalent permeability for the assembly of soils Find the Total head, elevation head and pore water pressure at points (A, B, and C) with respect to the given datum. Given: k1=2k2=3k3=k4= 2x10³ cm/sec All units are in cm 55.0 F12.512.5 k ki 15.0HA k1 100 30.0 20.0 40.0- k2 Datum 5.0arrow_forwardFor a moist soil sample, the following are given: Volume be 1.1 m3, and soil mass be 2010 kg, and moisture content be 6.5 %, and the specific gravity be 2.7. Find moist density Dry density isarrow_forward11. Situation 11 - The moist unit weight and degree of saturation of a soil are given in the following table. a. Determine the unit weight of the soil in kN/m3 if s = 13%. Round off to two decimal places. bDetermine the unit weight of the soil in kN/m3 if s = 69%. Round off to two decimal places. c. Determine the saturated unit weight in kN/m3. Round off to two decimal places.arrow_forward
- Calculate the water content of a soil with zero air voids and void ratio equal to 0.5. (Take G=2.7)arrow_forwardCompute the total unit weight, dry unit weight, water content, and saturated unit weight of the soil sample below. Volume Weight Air Va Vv Vw Wa watef ww V Vs solids Ws Given: e = 0.8 s = 0.9 Gs = 2.68arrow_forwardFor a moist soil sample, the following are given. Total volume: V =1.2 m, Total mass: M= 2350 kg Moisture content%3 8.6% Specific gravity of soit solids: G 2.71 Determine the following. i. Moist density ii. Dry densityarrow_forward
- A fully saturated soil sample has a volume of 28 cc. The sample was dried in oven and the weight of the dry soil pat was found to be 48.76 g. Given G= 2.68. Determine volume of water in cm3.arrow_forwardThe transformed coefficient of permeability of an equivalent isotropic soil mass is 13 x 10-/ cm/s. Determine the permeability in vertical direction if the permeability in horizontal direction is 3 x 10 7 cm/s.arrow_forwardThe soil sample presented in Figure below is under constant head permeability test. The soil is consist of a silty sand (SM) with k = 5×10-3cm/s and specific gravity of 2.70. The soil is fully saturated and its moisture content is determined to be 18.5%. Determine the time required for the plug of colored water to pass through the soil (i.e., from when the leading edge first enters the soil to when it begins to exit). Use seepage velocity for your calculation.arrow_forward
- d. Problem III. A sample of wet soil has water content of 18% and a porosity of 42%. The unit weight of soil solid is 25.917 (kN/m³). a. Find the dry density and saturated density (kN/m³). b. If the degree of saturation increases by 25%, determine the mass density (kN/m³)arrow_forwardA saturated soil has the following characteristics: Initial mass = 40.91 grams Final mass = 28.79 grams Initial Volume = 23 cm3 Final Volume = 15 cm3 Determine the specific gravity of soil solids. Round off to two decimal places.arrow_forwardFor a falling-head permeability test, the following values are given: Length of specimen = 200 mm %3D Area of soil specimen = 1000 mm^2 %3D Area of standpipe = 40 mm^2 Head difference at time t = 0 = 500 mm Head difference at timt t 180 seconds = 350 mm %D %3D Determine the hydraulic conductivity of the soil in x10 4 cm secarrow_forward
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