A hydraulic backhoe cuts a building basement that is uniformly 18-ft deep. The bottom of the basement is 80-ft x 130-ft, and the soil is OSHA Type B, common earth. Its heaped bucket capacity is 3.7-LCY. Job efficiency is 45-min/hr. The machine’s maximum 8-ft level cutting depth is 24-ft. You note that hauler access to position effectively is limited, so on average the site will permit a swing angle of 90-degrees between excavator cut and hauler bed. A. Determine the production rate in LCY/hr. B. Determine the duration in hours of the basement excavation activity.

A hydraulic backhoe cuts a building basement that is uniformly 18-ft deep. The bottom of the basement is 80-ft x 130-ft, and the soil is OSHA Type B, common earth. Its heaped bucket capacity is 3.7-LCY. Job efficiency is 45-min/hr. The machine’s maximum 8-ft level cutting depth is 24-ft. You note that hauler access to position effectively is limited, so on average the site will permit a swing angle of 90-degrees between excavator cut and hauler bed. A. Determine the production rate in LCY/hr. B. Determine the duration in hours of the basement excavation activity.

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter18: Pile Foundation

Section: Chapter Questions

Problem 18.10P

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