An earth dam shown is required to have an effective unit weight of 12.079 kN/m3. The suitable material for the dam was identified available from the two borrow sites in the vicinity of the proposed dam. Borrow site A has dry unit weight of 17.875 kN/m3 and was observed to have free swell of 18.975%. Borrow site B has bulk unit weight of 19.245 kN/m3 at moisture content of 8.544% and was observed to have free swell of 28.785%. Assume Gs to be 2.841.
An earth dam shown is required to have an effective unit weight of 12.079 kN/m3. The suitable material for the dam was identified available from the two borrow sites in the vicinity of the proposed dam. Borrow site A has dry unit weight of 17.875 kN/m3 and was observed to have free swell of 18.975%. Borrow site B has bulk unit weight of 19.245 kN/m3 at moisture content of 8.544% and was observed to have free swell of 28.785%. Assume Gs to be 2.841. Determine the following:
a. Volume of the soil solids per meter length of the dam, m3.
b. Cost per meter length of the dam if borrow site A was chosen at cost of P264.855 per cubic meter.
c. Cost per meter length of the dam if borrow site B was chosen at cost of P238.012 per cubic meter.
[Formula for volume of dam = 1/2 (b1 + b2) x h x L]
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