Question

on and Volume Change: 10 points An earthwork project has the following conditions: Borrow Site -soil density is 120 PCF with water content w = 15% Fill Site soil density is 135 PCF with water content w 17 % - Unit weight of water: 8.34 lb per gallon a. How many gallons of water must be added to the borrow per cubic yard and 20 Points ph 4. Dozer Production material pped per hour (9CHd atteched Cat Estinated Ripper Prd Given: D8R Dozer equipped with a Semi-universal "SU" blade Push distance 120 ft, over a flat 0 % grade Haul material = Rock - well blasted Visibility poor Slot-type dozing operation Operator apprentice (Poor Operator) Efficiency-50 minute hour a.) Determine the volume of material pushed per hour (LCY/Hr) by a single D8R dozer using the Cat Estimated Dozing Production chart. b.) Using the response to question a.) above and the attached Table 4.3 listing representative properties of earth and rock, provide the production in BCY/Hr.

Answer 1

3) Given,

Borrow site:

Soil density = 120 pcf

Water content = 15%

Dry density = Soil density / (1+water content) = 120/1.15 = 104.35 pcf

Fill site:

Soil density = 135 pcf

Water content = 17%

Dry density = Soil density/(1+water content) = 135/1.17 = 115.385 pcf

Assume 1 cubic yard to be filled in fill site

Vi V2 701

Vi 115.385 104.35

V_{​​​​​​1} = 1.106 cubic yards

Water added to borrow pit = = 104.35 * 1 * 27 * (0.17 - 0.15) = 56.35 lbs

7aV(W2 – w1

Number of gallons = 56.35/8.34 = 6.76 gallons