A contractor excavates 10,000 m3 soil at moist unit weight of 17.5 kN/m3 and moisture content of 10% from a borrow pit and transports it to a project site. The project has an area of 20,000 m2 to be filled with this compacted soil. If the required dry unit weight and moisture content of the compacted soil are 18.3 kN/m3 and 12.5% (assume there is no soil loss during transportation and compaction), what is the thickness of the compacted soil and how much water needs to be added? If there are 2% dry soil loss and 3% moisture loss, what is the thickness of the compacted soil and how much water neeeds to be added to maintain the compaction at the required moisture content?

A contractor excavates 10,000 m3 soil at moist unit weight of 17.5 kN/m3 and moisture content of 10% from a borrow pit and transports it to a project site. The project has an area of 20,000 m2 to be filled with this compacted soil. If the required dry unit weight and moisture content of the compacted soil are 18.3 kN/m3 and 12.5% (assume there is no soil loss during transportation and compaction), what is the thickness of the compacted soil and how much water needs to be added? If there are 2% dry soil loss and 3% moisture loss, what is the thickness of the compacted soil and how much water neeeds to be added to maintain the compaction at the required moisture content?

Principles of Foundation Engineering (MindTap Course List)

9th Edition

ISBN:9781337705028

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter5: Soil Improvement And Ground Modification

Section: Chapter Questions

Problem 5.9P

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In a fill section of a construction site, 1500 m3 of moist compacted soils is required. The design water content of the fill is 15%, and the design unit weight of the compacted soil is 18.5 kN/m3. Necessary soil is brought from a borrow site, with the soil having 12% natural water content, 17.5 kN/m3 wet unit weight, and Gs = 2.65. How much (in cubic meters) of the borrow material is required to fill the construction fill section? And how heavy is it?
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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?
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