Q12. After surveying a borrow pit, the surveyor produced the following pit grade below. What is the total volume (cubic yard)? The unit in the map is ft, the square is 20ft x 20ft. 5.0 20.0 |4.2 3.9 5.4 13.3- -13.3 4.3 4.6 5.4 4.4 -20.0 6.1 5.4 |5.8 4.9 4.7 4.8 5.1 4.6 3.9 -13.3– -26.7 4.6 5.4 4.4 |3.9 5.5 5.1 4.9 4.2 4.2 3.9 4.4 4.7 -20.0 -20.0

Construction Surveying

Find the volume in cubic yards of the excavation for the borrow pits shown. The numbers at the corners represent the cuts infeet.

Given the following set of slope staking notes, find X2: Basis for Cut Basis for Fill Cutslope O 28.8 O 22.2 25.4 32.4 Sta. 5100 5000 4900 None of these. 52 38 s=2:1 ft ft L CX1 33.4 F 7.3 33.6 F 8.6 36.2 C C 5.5 FO F 3.5 R C 3.2 X2 C 4.1 34.2 FO 19

4. Given the approximate flat area and depth of excavation of the following borrow pits: a. 3750.0 sq. m. and 758.0 cm b. 0.035 sq. km and 180.0 m c. 15.6 ares and 495.0 m d. 9.250 ha and 250.0 m e. 46750 sq. m. and 195.0 m Determine the volume of earth removed from each pit in cubic meters.

5 3 7 8 Table below shows the chainage (length), cut and fill end areas Earthwork Calculations Station 0+30 1+00 1+50 cut end area fill end area (sf) (sf) 320 650 270 780 300 620 cut volume fill volume (cy) (cy) total volume total volume of fill of cut For the earth calculations shown on the left, compute the total volume of fill. (sf = square feet, cy= cubic yards, 1 cy= 27 cubic ft) Hint: When the end areas of cut or fill have been computed for adjacent stations, the volume of cut or fill between those stations can be computed by simply averaging the end areas and multiplying the average end area by the distance between the end area stations. Length is the difference between stations. V-(A1+A2)/2*L 60,800 cy 53,000 cy 2.252 cy 2,021 cy

Indicate the general advantages and disadvantages associated with hydraulic fill placement methods.