Question

Specifications of a road embarkment requires the soil to be compacted to a moist unit weight of 19.2kN/m3 at a moisture content of 17.5%.the soil is to be obtained from a borrow area where the in situ dry unit weight is 15.9 kN/m3. The volume of the finished embarkment is to be 1520m3.

What volume of the borrow material is required for the road embarkment? It is assumed that the volume of tye fill be essentially unchanged when it is transported from the borrow area to be site of the embarkment.

Answer 1

solution: riven boorow Area = 15. 15.9 kN/m3 of embankment Yary of & bulk 19.2 kN/m². moisture content of embankment = 1705% (We) Total volume as embankment Step1 1520 m3. Masy) emb Y bulk tw = 16.34 k I KN/m3 lto.175 Abulk= Total weight 1 Yary = wt of solid wt. of solid 16.34 Vrotal of solid = 24836.8 wte of solid soil in embankment a wt of solid in borrow wte area. Yarry) borrow Area wt of solid Utotal total = 24836.8 - 1562.06 m3, 15.9 Volume of borrow pit required to make road ISG2.06 m3 18