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i: A hydraulic shovel with a bottom-dump bucket with a heaped bucket volume of 5 m3...

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Civil Engineering

i: A hydraulic shovel with a bottom-dump bucket with a heapedbucket volume of 5 m3 is excavatingtough clay. The swing angle is 47 degrees and thejob efficiency is 0.86. Calculate the shovelproduction in BCM

ii: Estimate the time required to load 452m3 of gravel from a stockpile intotrucks using a clamshell having a heaped bucket capacity of 0.57m3. The estimated cycle time is 20s. Swing depth factor= 1.0. Job efficiency is estimated to be51min/h.

iii: A small hydraulic excavator will be used to dig a trench inhard clay. The trench size is 0.76 m wide by 1.52mdeep. The excavator bucket available is 0.76 m wide and has aheaped capacity of 0.51m3. The maximumdigging depth of the excavator is 4.90 m. The average swing angleis expected to be 75° and the job efficiency is 71%. Estimate the hourly trench production in BCM and inlinear meters of a trench.

Answer & Explanation Solved by verified expert
3.7 Ratings (626 Votes)
Ans i We knowShovel produuction BCMhr C x S x V x B x E x Lwhere C cycle per hourS swing factorV heaped bucked volume 5 B bucket fill factorE job efficiency 086L Load factor 077 for clayAccording to table 36 for tough clay and bottom dump shovelcycle per hour C 140For    See Answer
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