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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Transcribed Image Text: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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