Refer to Problem 3.18. Given that the borrow pit has a moisture content of 11% and G_s = 2.7, determine:
a. Moist unit weight of the borrow soil
b. Degree of saturation of the borrow soil
c. Moist unit weight of the compacted backfill

Data From Problem 3.18

Refer to Figure 3.13. After the construction of a concrete retaining wall, backfill material from a nearby borrow pit was brought into the excavation behind the wall and compacted to a final void ratio of 0.8. Given that the soil in the borrow pit has a void ratio of 1.1, determine the volume of borrow material needed to construct 1 m3 of compacted backfill.

Transcribed Image Text:

FIGURE 3.13 Concrete retaining wall Excavation Compacted backfill (e = 0.8) Ground level Soils from borrow pit (e = 1.1)