A tractor mounted ripper will be used for excavating a limestone having a seismic velocity of 1830m/sec. Field tests indicate that the ripper can obtain satisfactory rock fracturing to a depth of 0.61 m with one pass of a single shank at 0.91 m intervals. Average ripping speed for each 152 m pass is 2.4 km/hr. Maneuver and turn time for each pass averages 0.9 min. Job efficiency is estimated at 0.70. Estimate the hourly production (Bm³/h) of excavation.

A tractor mounted ripper will be used for excavating a limestone having a seismic velocity of 1830m/sec. Field tests indicate that the ripper can obtain satisfactory rock fracturing to a depth of 0.61 m with one pass of a single shank at 0.91 m intervals. Average ripping speed for each 152 m pass is 2.4 km/hr. Maneuver and turn time for each pass averages 0.9 min. Job efficiency is estimated at 0.70. Estimate the hourly production (Bm³/h) of excavation.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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A tractor mounted ripper will be used for excavating a limestone having a seismic velocity of 1830m/sec. Field
tests indicate that the ripper can obtain satisfactory rock fracturing to a depth of 0.61 m with one pass of a single
shank at 0.91 m intervals. Average ripping speed for each 152 m pass is 2.4 km/hr. Maneuver and turn time for
each pass averages 0.9 min. Job efficiency is estimated at 0.70. Estimate the hourly production (Bm³/h) of
excavation.

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