Question

Problem Description A 20 m wide, 2km long, and Im thickness embankment should be constructed for a railway project in Melbourne city. The required soil for the embankment construction will be transported from a borrow pit located in a rural site. The borrow pit has loosely compacted sandy loam soil. Porosity of this borrow pit's soil is 0.40 and the specific gravity is 2.7. Part A; In order to maintain the stability of the railway project the embankment needs to be well compacted. According to the engineering estimation, dry density of the embankment should be at least 2000 kg/m3 to maintain the required structural stability of the railway line. 1) Determine the dry density of the soil available in the borrow pit 2) Determine the minimum soil volume required from the borrow pit to construct the proposed embankment If the soil is transported by a truck of 20 m3 size and the cost for one soil truck (for soil and delivery) is 200 dollars, calculate the total cost associated with the soil transportation from the borrow pit to the embankment site 3)

Answer 1

Sol Volume Porosity r berouoPit n ●u , sf.amwHy (6) = 2.Y t-t e f-in

R nove e OON 2000-49392,将㎡ (6196干 ピ〉 Tret volumu.fir one-hip -oo ms nvmbut rere embau 20 2469.68 csst o one truct sotl and delivwrg Total cost J e 24チ0X200 二 4.94000 dollars