1 Determine the amount of excavation needed for the continuo

1. Determine the amount of excavation needed for the continuous footings in Figures 15-1 and 15-2. A one-foot working distance is required and the excavation will be sloped 1:1(one vertical foot for every horizontal foot).

2. Determine the amount of backfill needed for continuous footing and foundation in Problem 1.

21\' 5\' -15\' 25 20\' Figure 15-1 Foundation Plan View 2 x 4 WALL #5 pOMEL5 @ 12.. o.C·ALTERNATING 8\' 2\' 2EACH #4REBAR TOP AND BOYTOM CONT. REBAR l\' 2\' Figure 15-2 Wall Section

Solution

total excavetion = average width x depth x perimeter.
\"average\" width of cut = 4+1+1 = 6\'
perimeter = 122\'
depth = 2
total excavation = 6x122x2 = 1464 cubic feet

B) total back fill = 122 x [12 - (2+2/3)] = 3416 / 3 cubic feet