Question

15-15 The following table shows the stations and ordinates for a mass diagram. The distance is 600 ft. Overhaul cost is $15 per station yard. Station Ordinate (yd) 0 +00 1 +00 2 + 00 2 +20 4 +00 6 + 00 7 +00 8 +20 9 +00 10 + 00 10 + 30 45 60 90 120 140 110 90 82 60 Use the method of movements to compute the additional cost that must be paid to the contractor. (a) (b) Sketch the ground profile if the finished grade of this roadway section is level (0 percent).

Answer 1

Free haul distance is 600 feet. Over haul cost is S15 per station yard. Method of moments to be used. Summarize the values of stations and ordinates required for a mass haul diagram. Station [Ordinate (cubic ards 0+00 1+00 2+00 2+20 4+00 6+00 7+00 8+20 9+00 10+00 60 10+30 0 45 60 90 120 140 110 90 82

The free haul is demarcated on the mass haul diagram as below. 160 140 120 100 80 60 40 20 Free haul Over haul on RHS Over haul on LHS 0+00 1+00 2+00 2+20 4+00 6+00 7+00 8+20 9+00 10+00 10+30

Over haul from mass diagram is 90yd* Total haul distance is 10.30 stations equal to 1030 feet Free haul distance is 6 stations equal to 600 feet Overhaul distance is total haul distance minus free haul distance equal to 430 feet Take the left overhaul. Volume between station 0+-00 and 1+00 is 45 yd

Average distance to free haul station 2+20 is+100+20 170ft Volume between station 1+00 and 2+00 is 15yd Average dstance to free haul station 2+20 s 10020-70t Volume between station 2+00 and 2+20 is 30yd' 20 Average distance to free haul station 2+20 is 10ft Compute the overhaul distance moved between stations 45yd1 x170ft+15ydx70ft+30ydx10ft -100ft 90yd

Take the right overhaul. Volume between station 10+30 and 10+00 is 60 yd* Average distance to free haul station 8+20 is +10080-195ft Volume between station 10+00 and 9+00 is 22 yd Average distance to free haul stations-20 is +80ะไ30ft Volume between station 9+00 and 8+20 is 12yds Average distance to free haul station 8+20 is Compute the overhaul distance moved between stations 60 yd3 x195ft+22 ydx130ft+12ydx40ft 30 100 80 40ft -167.11ft 90 yd Total overhaul distance is 100+167.11 267.11ft Overhaul price is $15per stati on yardx 267.11stationsx90yd $3,605.99 100