Q.3/A Crawler hoe having a three Cyd bucket and whose cost per hour, including the wage to an operator, is $95 will excavate and load haul units under each stated condition. The maximum digging height of the machine is (25 ft.). Determine the cost of one cubic yard for each condition. Condition 1 2 3 Material Depth of excavation Percent swell Angle of swing Efficiency factor (min/hr) Sandy clay Hard clay Rock, well blasted 15 60 90 50 10 20 60 45 18 35 90 50 4 Sand & gravel 20 13 150 55

Q.3/A Crawler hoe having a three Cyd bucket and whose cost per hour, including the wage to an operator, is $95 will excavate and load haul units under each stated condition. The maximum digging height of the machine is (25 ft.). Determine the cost of one cubic yard for each condition. Condition 1 2 3 Material Depth of excavation Percent swell Angle of swing Efficiency factor (min/hr) Sandy clay Hard clay Rock, well blasted 15 60 90 50 10 20 60 45 18 35 90 50 4 Sand & gravel 20 13 150 55

Principles of Foundation Engineering (MindTap Course List)

9th Edition

ISBN:9781337705028

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter18: Sheet-pile Walls

Section: Chapter Questions

Problem 18.6P

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5. A crawler hoe having a 3-cy bucket and whose cost per hour, including the wages to an operator, is $86, will excavate and load haul units under each of the stated conditions. The maximum digging depth of the machine is 25 ft. Determine the cost per bank cubic yard for each condition. Condition (1) (2) (3) (4) Material Sandy clay Hard clay Rock, well blasted Sand and gravel Depth of excavation (ft) Angle of swing (degrees) 10 60 88 18 15 20 90 90 00 150 Percent swell Efficiency factor (min-hr) 45 50 24 20 50 50 55 35 13
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11.2 A crawler hoe with a 3-cy bucket and a cost per hour, including the wages to an operator, of $86 will excavate and load haul units under each of the stated conditions. The maximum digging depth of the machine is 25 ft. Determine the cost per bank cubic yard for each of the stated conditions. Condition Material Depth of excavation (ft) Angle of swing (degrees) Percent swell Efficiency factor (min-hr) (1) Sandy clay 10 60 20 45 (2) Hard clay 18 90 50 (3) Rock, well blasted 15 90 50 (4) Sand and gravel 20 150 13 55
Choose the lowest size and the required number of crawler hoes to excavate 828864 b-Cyd of sand & gravel in 4 months. A size one Cyd excavator (including the wage's operator) costs $80 /hr. with an increment of $5 per extra 0.5 Cyd. Depth of excavation 12 ft, Swell 25%, and efficiency 65%. Suppose the work is 8hr/day. Estimate the total expected cost.
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A contractor is to excavate an area of 350′ × 150′ to a depth of 9′ and haul it by dump truck to a site where it is to be used for fill. The soil will then be fully compacted. If the swell factor is 25 percent and the shrinkage factor is 18 percent. Estimate the total bare cost for the job (excavation only) using a 2½ CY front-end loader, track mounted. Consider average nation price. Use the crew below.
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