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 to a construction site for use in a compacted fill. If the specifications call for the soil to be compacted to a minimum dry unit weight of 16.27 kN/m3 at the same moisture content of 18%, how many cubic meters of soil from the excavation site are needed to produce 7,651 m3 of compacted fill? How many 178 kN truckloads are needed to transport the excavated soil?
The following are given for a natural soil deposit: Moist unit weight, γ = 17.8 kN/m3 Moisture content, w = 14%; Gs = 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/m3 at the same moisture content of 14%, how many cubic meters of soil from the excavation site are needed to produce 20,000m3 of compacted fill?
the following are given for natural soil deposite;
moist unit weight =17.8KN/m3, moisture content=14% this soil is to be excavated to a construction site for use in compacted fill. if the specification calla for the soil to be compacted to minimum dry unit weight of 18.8kn/m3 at the same moisture content of w=14% how many cubic meters of soil from the excavation site are needed to produce 20000m3 of compacted fill
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Principles of Geotechnical Engineering (MindTap Course List)
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- A soil sample taken from a borrow pit has an in situ void ratio of 1.15. The soil is to beused for a compaction project where a total of 100,000 m3 is needed in a compactedstate with the void ratio predetermined to be 0.73. Determine how much volume is tobe excavated from the borrow pit.arrow_forwardThe Undisturbed soil at a given borrow pit is found to have the following parameters. The water content is 15%, the void ratio is 0.60 and the specific gravity of the solids is 2.70.The soil from this borrow pit is to be used to construct a rolled fill having a finished volume of 50,000 yd3. The soil is excavated by means of a shovel and dumped on trucks. When loaded to capacity these trucks are found to contain, on average, a net weight of wet soil equal to 13,000 lbs.In the construction process, the trucks dump their load on the fill, the material is spread and broken up, after which a sprinkler adds water until the water content is equal to 18%. The soil and water are thoroughly mixed by means of dicers (or other similar equipment) and then compacted until the dry unit weight γd=110 lbs/ft3 Helpful Conversions (3ft=1yd), (γw=62.4 lbs/ft3), (7.48gal/1ft3) a) Assuming that each load is a capacity load, how many truck loads are required to construct the fill?b) What is the volume in…arrow_forwardWhy do we use the dry unit weight as a measure of how compacted a soil is? For a given compactive effort, describe how the dry unit weight of the compacted soil is affected by the as-compacted moisture content.arrow_forward
- In a fill section of a construction site, 1600 m³ of moist compacted soils are required. The design water content of the fill is 14.5%, and the design unit weight of the compacted soil is 17.8 kN/m³. Necessary soil is brought from a borrow site, with the soil having 11.5% natural water content, 17.2 kN/m³ wet unit weight, and G, = 2.64. How much (in cubic meters) of the borrow material is required to fill the construction fill section? And how heavy is it?arrow_forwardGEOTECHNICAL ENGINEERING: The Undisturbed soil at a given borrow pit is found to have the following parameters. The water content is 15%, the void ratio is 0.60 and the specific gravity of the solids is 2.70. The soil from this borrow pit is to be used to construct a rolled fill having a finished volume of 50,000 yd3 . The soil is excavated by means of a shovel and dumped on trucks. When loaded to capacity these trucks are found to contain, on average, a net weight of wet soil equal to 13,000 lbs. In the construction process, the trucks dump their load on the fill, the material is spread and broken up, after which a sprinkler adds water until the water content is equal to 18%. The soil and water are thoroughly mixed by means of dicers (or other similar equipment) and then compacted until the dry unit weight γd=110 lbs/ft3. Helpful Conversions (3ft=1yd), (γw=62.4 lbs/ft3), (7.48gal/1ft3 ) a) Assuming that each load is a capacity load, how many truck loads are required to construct the…arrow_forwardGEOTECHNICAL ENGINEERING: The Undisturbed soil at a given borrow pit is found to have the following parameters. The water content is 15%, the void ratio is 0.60 and the specific gravity of the solids is 2.70. The soil from this borrow pit is to be used to construct a rolled fill having a finished volume of 50,000 yd3 . The soil is excavated by means of a shovel and dumped on trucks. When loaded to capacity these trucks are found to contain, on average, a net weight of wet soil equal to 13,000 lbs. In the construction process, the trucks dump their load on the fill, the material is spread and broken up, after which a sprinkler adds water until the water content is equal to 18%. The soil and water are thoroughly mixed by means of dicers (or other similar equipment) and then compacted until the dry unit weight γd=110 lbs/ft3. Helpful Conversions (3ft=1yd), (γw=62.4 lbs/ft3), (7.48gal/1ft3 ) a) If the fill should become saturated at some time subsequent to construction and does not change…arrow_forward
- The soil in a borrow pit is at water content of 8.8% and bulk unit weight of 17.8 kN/m3. This soil is used in theconstruction of a compacted road base where the dry unit weight is 19.4 kN/m3 and the water content is 15%. Ifthe finished volume of the road base is 120,000 m3, (a) what would be the volume of the soil removed from theborrow pit? (b) How much water would be added to the soil from the borrow pit?arrow_forwardA soil having a void ratio of 0.68 as it exists in a borrow pit is to be excavated and transported to a fill site where it will be compacted to a void ratio of 0.45. The volume of the fill required is 2500 m. Find the volume of the soil must be excavated from the borrow pit to furnish the required volume of fill. Calculate the total cost of the excavated material from the borrow pit, if the unit cost of material is 25 Dirhams per meter cube of fill.arrow_forwardThe 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 soilarrow_forward
- A hand-carved sample of clay having a mass of 2.62 kN is removed from a 0.5 meter- diameter hole. The hole can be filled with 1.33 kN of water. A sample of clay having a mass of 112.4 grams is oven-dried and has a dry mass of 103.6 grams. Assuming the maximum and minimum attainable unit weight of 18.47 kN/m3 and 16.33 kN/m3 and specific gravity of 2.67, what is the relative density of the soil in percent? Relative Density= %arrow_forwardThe in-situ moisture content of a soil is 18% and its moist unit weight is 105 pcf. The specific gravity of the soil solids is 2.75. This soil is to be excavated and transported to a construction site, and then compacted to a minimum dry unit weight of 103.5 pcf at a moisture content of 20%. How many cubic yards of excavated soil are needed to produce 10,000 yd3 of compacted fill?arrow_forwardAn earthen embankment under construction has a total unit weight o f 99.9 lb/ft3 and a moisture content of 10 percent. Compute the quantity of water required to be added per 100 ft3 of earth to raise its moisture content to 14 percent at the same void ratio.arrow_forward
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