The undisturbed soil found in a borrow pit demonstrates a bulk unit weight of 18.1 kN/m³ and a moisture content of 11 2%. This soil, extracted mechanically, will be utilized for constructing a subbase for an airport runway (rectangular) 115 m wide, 2125 m long, and 750 mm thick. The soil is loaded into trucks, each with a capacity of 5.50 m³, resulting in a load weight of 68.5 KN when fully loaded. In the construction process, the trucks deposit the soil on-site, after which it is spread and fragmented. Water is subsequently applied to increase the moisture content to 17.3%. Lastly, the soil is compacted to attain a dry unit weight of 16.9 kN/m³. a. Assuming each load is to the half capacity, how many truckloads are required to construct the fill? b. What would be the volume of the pit in the borrow area? Round-up your answer to the nearest whole number. c. How many liters of water should be added to a truckload? Round-up your answer to the nearest whole number. d. If the subbase becomes saturated, what would be the new water content? Assume G, = 2.7

The undisturbed soil found in a borrow pit demonstrates a bulk unit weight of 18.1 kN/m³ and a moisture content of 11 2%. This soil, extracted mechanically, will be utilized for constructing a subbase for an airport runway (rectangular) 115 m wide, 2125 m long, and 750 mm thick. The soil is loaded into trucks, each with a capacity of 5.50 m³, resulting in a load weight of 68.5 KN when fully loaded. In the construction process, the trucks deposit the soil on-site, after which it is spread and fragmented. Water is subsequently applied to increase the moisture content to 17.3%. Lastly, the soil is compacted to attain a dry unit weight of 16.9 kN/m³. a. Assuming each load is to the half capacity, how many truckloads are required to construct the fill? b. What would be the volume of the pit in the borrow area? Round-up your answer to the nearest whole number. c. How many liters of water should be added to a truckload? Round-up your answer to the nearest whole number. d. If the subbase becomes saturated, what would be the new water content? Assume G, = 2.7

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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Question

The undisturbed soil found in a borrow pit demonstrates a bulk unit weight of 18.1 kN/m³ and a moisture
content of 11 2%. This soil, extracted mechanically, will be utilized for constructing a subbase for an
airport runway (rectangular) 115 m wide, 2125 m long, and 750 mm thick. The soil is loaded into trucks,
each with a capacity of 5.50 m³, resulting in a load weight of 68.5 KN when fully loaded.
In the construction process, the trucks deposit the soil on-site, after which it is spread and fragmented.
Water is subsequently applied to increase the moisture content to 17.3%. Lastly, the soil is compacted to
attain a dry unit weight of 16.9 kN/m³.
a. Assuming each load is to the half capacity, how many truckloads are required to construct the
fill?
b. What would be the volume of the pit in the borrow area? Round-up your answer to the
nearest whole number.
c. How many liters of water should be added to a truckload? Round-up your answer to the
nearest whole number.
d. If the subbase becomes saturated, what would be the new water content? Assume G, = 2.7

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GEOTECHNICAL 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…
GEOTECHNICAL 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…