Problem 15: A proposed earth dam project will contain 7,000,000 m of compacted earth fill having a porosity of 0.4. There are three quarry pit sites nearby A, B and C. It is required to determine the most economical solution to this construction project based on the overall transport cost. Transport Cost S/tonne Bulk density kg/m³ 1950 2000 Pit Site Void ratio 1.24 1.05 0.31 0.34 A 1.16 0.33 2140

Problem 15: A proposed earth dam project will contain 7,000,000 m of compacted earth fill having a porosity of 0.4. There are three quarry pit sites nearby A, B and C. It is required to determine the most economical solution to this construction project based on the overall transport cost. Transport Cost S/tonne Bulk density kg/m³ 1950 2000 Pit Site Void ratio 1.24 1.05 0.31 0.34 A 1.16 0.33 2140

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 5.5P

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An approach road for a bridge needs 60000 m3 of soil compacted to a void ratio of 0.7. There are two borrow pits A and B from where the required soil can be taken and transported to the site. The borrow pit A has void ratio 0.85 and borrow pit B has void ratio 0.95. If the cost of excavation of soiland transportation is Rs. 20/10 m3for area A and Rs. 22/10 m3for area B, which of the borrow area is more economical? G=2.67
The soil borrow material to be used to construct a highway embankmenthas a density of 1570 kg/m3, a water content of 6%, and the relative density of soilsolids is 2.65 . The specifications require the soil to be compacted to a dry density of1794 kg/m3 and the water content held to 13%.a. How many BCM are required to construct a 176,306 m3 embankment?b. How many liters of water must be added to the borrow material, on a cubic meterbasis, assuming no loss by evaporation?c. If the compacted embankment becomes saturated at constant volume, what will bethe water content and the density of the soil?
Q1. Answer the followinga) Convert 1700LCM of common earth to a volume in compacted measure (CCM). b) Calculate the volume of sand and gravel (in LCM) needed to fill a ditch that is 2km x 3m x 1.5m. The sand and gravel will be compacted.
Soil for a compacted earth fill is available from three different borrow sites. At the earth fill, the soil is to be compacted to a void ratio of 0.62 with a finished volume of 150,000 m3 . The in-situ void ratios and the costs (soil and transportation) per cubic metre for the three sites are given below. Which site would be economical?
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What should be the volume of the pit that remains in theborrow area after all the material required for the fill hasbeen removed?
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