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 6.15P
To determine
The final thickness of the soil layer after compaction.
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1. The relative compaction of a clayey sand in the field is 90%. In the laboratory, the maximum dry unit weight is 115 ??/??3. If the soil layer before compaction had a void ratio of 0.97 and a thickness of 5.5 ft. What would be the final thickness after compaction? Assume ?? = 2.67.
COMPLETE SOLUTION PLEASE
The dry density of a sand with a porosity of 0.387 is 1600 kg/ m3, determine the void ratio, specific gravity, and saturated unit weight of soil in KN/ m3.
The relative compaction of a sand in the field is 94%. Given the dry unit weight maximum= 16.2 kN/m3 and the dry unit weight minimum = 14.9 kN/m3.For the field conditions Compute the relative density of compaction
Chapter 6 Solutions
Principles of Geotechnical Engineering (MindTap Course List)
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- For a normally consolidated soil, the following is given: Determine the following: a. The compression index, Cc. b. The void ratio corresponding to pressure of 200 kN/m2arrow_forwardA 3 layer soil has the following properties from top to bottom. Obtain the equivalent vertical coefficienct of permeability, in cm/sec, round off to 7 decimal places, and obtain the equivalent horizontal coefficient of permeability, in cm/sec, round off to 5 decimal places.arrow_forwardEstimate the vertical coefficient of permeability for a uniform clay deposit where representative test results are as shown: LL = 92, PL = 34 percent of clay size particles in the soil =40 void ratio ( approximate ) = 1.75arrow_forward
- a. A soil specimen with volume of 0.60x10-4 m3 , weighs 0.105 kg. Its dry weight is 0.0802 kg, and Gs is 2.65. Compute • Water content m, % • Void ratio e and porosity n Degree of saturation Sr, %arrow_forwardFor a moist soil specimen, the following are given Gs= 2.67, volume = 0.5 m³ moist unit weight = 9.5 KN and the moisture content = 7.3%. Determine Dry unit weight, Void ratio, porosity, Degree of saturation.arrow_forwardThe dry unit of a sand with a porosity of 0.387 is 1600kg/cu.m. Determine the following:a) Void ratiob) Sp.gr. of soilc) Saturated unit weight of soil in KN/cu.m.arrow_forward
- A sand is densified by compaction at a site so that the void ratio changes from 0.80to2.70. what is the increase (change) in dry unit weight of the sand in kN/m^3?arrow_forwardThe degree of compaction of sand in the field is 93.5%. Considering a dry specific weight maximum “γd max” and minimum “γd min” (see Table 1) of this sand determine the dry specific weight in field and its relative compression compactness.arrow_forwardIn the field, the relative compaction (RC) of a sandy road foundation is 90%. Ya(max) = 20.4 kN/m and Ya(min) = 13.9 kN/m2 are the maximum and minimum dry unit weights of sand, respectively. Calculate the field values of the following: a) the dry unit weight in the field; b) the relative density (of compaction) D; and c) the moist unit weight y with a moisture content of 15%.arrow_forward
- 3. A saturated soil sample has a unit weight of 23 Kn/m^3 and specific gravity of 2.69. Compute the Dry Unit weight in English units, void ratio, Porosity, moisture content and the degree of saturation.arrow_forwardThe moist unit weight of a soil is 19.2 kN/m3. Given that Gs = 2.69 and w = 9.8%, determine:a. Void ratiob. Dry unit weightc. Degree of saturationarrow_forwardThe top 500 m of a site consists of a clayey sand with void ratio of 0.90 and water content of 20.0%. The specific gravity of the soil grains is 2.68. When the ground is compacted at the same water content, there is 45 mm reduction in the thickness of this layer. Determine the new void ratio and the unit weight of the soil. Show handwritten solutionsarrow_forward
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