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 6.10P
To determine
Find the volume of soil are required from the excavation site for the production of
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The in situ moisture content of a soil is 18% and the moist unit weight is 16.5 kN/m3.The specific gravity of soil solids is 2.75. This soil is to be excavated and transported toa construction site for use in a compacted fill. If the specifications call for the soil tobe compacted to a minimum dry unit weight of 16.27 kN/m3 at the same moisturecontent of 18%, how many cubic meters of soil from the excavation site are needed toproduce 7651 m3 of compacted fill? How many 178 kN truckloads are needed totransport the excavated soil
An earth dam needs to be compacted to reach 1.84 g/cm' at 15% water content. The field unit weight before compaction of the earth dam soil is 1.77 g/cm', the moisture content is 8% and specific gravity is 2.7. What is the amount of soil required to construct one cubic meter of the earth dam after compaction?
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- In its natural state the soil in a borrow pit, the total (moist) unit weight is 120 lb/ft³, and the water (moisture) content is 20 %. The result of the Modified compaction test of the soil of the borrow pit is given in the figure below. The soil from the borrow pit will be used to construct a compacted fill. The construction of the fill requires 10,000 ft³ of compacted soil. The specifications required that the compaction of the fill be performed at the optimum moisture content to obtain the maximum dry unit weight for fill. How much (volume in ft³) must be excavated from the borrow pit? Dry unit weight (lb/ft³) 107 106 105 104 103 102 8 12 w (%) 16 20 24arrow_forwarda) A saturated soil element has a specific gravity of 2.65 and water content of 10%. Determine the void ratio. b) The mass of a sample of moist soil is 240 grams. The sample is then dried in the oven and the mass reducesto 190 grams. Determine the water content of the soil as it was brought to the lab.arrow_forwardThe Atterberg limits of of a clay soil are liquid limit = 75 %, Plastic limit = 45 % and shrinkage limit = 25 %. If a sample of this soil has a volume of 30 cm³ at the liquid limit and a volume 16.6 cm³ at the shrinkage limit. Determine the specific gravity of solids.arrow_forward
- Sand at a borrow pit is determined to have an in-place dry unit weight of 115 pcf. Laboratory tests performed to determine the maximum and minimum unit weights give values of 122 pcf and 102 pcf, respectively. From these data, what is the relative density of the natural soil?arrow_forwardThe volume of the soil measured before drying is 120cc. The moist soil is 215g and dried weight is 162g. If the void ratio is 0.889, what is the approximate specific gravity of the soil? Choices: A. 2.28 B. 2.62 C. 2.55 D. 2.42arrow_forward737 grams of dry sand completely fills a 500 cm³ permeameter tube. The specific gravity of the sand is 2.6 and the density of water is 1.0 g/cm³. What is the void ratio of the soil? Please enter answer to 2 decimal places (for example, if void ratio is 0.6682, write 0.67)arrow_forward
- Geotechnical Engineeringarrow_forwardPROBLEM 3: A saturated, remolded clay soil has a water content of 32 percent, a liquid limit water content of 35 percent, a plastic limit water content of 20 percent, and an amount of clay sizes (finer than 0.002 mm) of 17 percent. What is the liquidity index of this soil? a. 0.6 C. 0.25 b. 0.8 d. 0.96arrow_forwardThe Atterberg limits of a clay soil are: Liquid limit = 75%; Plastic limit = 45%; and Shrinkage limit = 25%. If a sample of this soil has a volume of 30 cm3 at the liquid limit and a volume 16.6 cm3 at the shrinkage limit. Determine the specific gravity of solids, shrinkage ratio, and the volumetric shrinkage.arrow_forward
- The natural moistue content of an excavated soil is 32%. Its liquid limit is 60% and plastic limit is 27%. Determine the plasticity index of the soil and comment about the nature of the soil.arrow_forwardP4, 6.6 List the given, required, graph and box the final answer.arrow_forwardThe following are given for a natural soil deposit: Moist unit weight, y = 17.8 kN/m° Moisture content, w = 16 % G, = 2.7 This soil is to be excavated and transported to a construction site for use in a compacted fill. If the specification calls for the soil to be compacted at least to a dry unit weight of 18.4 kN/m° at the same moisture content of 16%, how many cubic meters of soil from the excavation site are needed to produce 21,000 m³ of compacted fill? (Enter your answer to three significant figures.) Total volume of soil to be excavated = m3arrow_forward
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