Construction Engineering & Management - Vol 2 | 7. Cycle Time of a Scraper by Abraham | Learn Smarter
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7. Cycle Time of a Scraper

Cycle time is a crucial aspect of scraper operations, encompassing fixed and variable time components. Fixed time components include loading, dumping, turning, and acceleration, while variable time is primarily influenced by haul and return distances. Proper loading practices and haul route maintenance significantly impact efficiency, with the aim of optimizing productivity and reducing costs.

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Sections

  • 1

    Cycle Time Of A Scraper

    This section explains the calculation and components that make up the cycle time of a scraper, emphasizing the importance of load, haul, dump, return, spot, turn, and acceleration/deceleration times.

    Learning Practice

  • 1.1

    Components Of Cycle Time

    The cycle time of a scraper consists of several components including load time, haul time, dump time, return time, spotting time, turning time, and acceleration, deceleration, and braking times.

    Learning Practice

  • 1.2

    Loading Time

    This section discusses the cycle time of scrapers, including various components such as load time, haul time, and the effects of machine speed and terrain.

    Learning Practice

  • 1.3

    Load Growth Curve

    This section discusses the cycle time components of a scraper and introduces the concept of the load growth curve, emphasizing the importance of not maximizing payloads beyond optimal levels.

    Learning Practice

  • 1.4

    Haul And Return Time

    This section explores the components of cycle time in scrapers, focusing on haul and return times, and highlights the significance of maintaining optimal loading practices.

    Learning Practice

  • 1.5

    Dump Time

    The section outlines the various components and calculations involved in determining the cycle time of a scraper, highlighting the significance of load time, dump time, variable and fixed times.

    Learning Practice

  • 1.6

    Turn Time

    This section discusses the cycle time of scrapers and its various components, emphasizing the significance of optimizing loading, hauling, dumping, and turning times.

    Learning Practice

  • 1.7

    Estimation Of Cycle Time

    This section discusses the components of the cycle time for scrapers, emphasizing the division between fixed and variable times for operations.

    Learning Practice

  • 2

    Pusher Cycle Time

    This section discusses the components and calculation of the cycle time for scrapers, emphasizing the distinction between fixed and variable time and the significance of loading techniques.

    Learning Practice

  • 2.1

    Components Of Pusher Cycle Time

    The cycle time for pushers consists of various components that include loading, haul, dump, return, spotting, turning, and acceleration related to their interaction with scrapers.

    Learning Practice

  • 2.2

    Loading Methods

    This section discusses the cycle time components of scrapers and loading methods, highlighting the importance of timing and efficiency in loading operations.

    Learning Practice

  • 2.2.1

    Back-Track Loading

    This section discusses the components of cycle time in scrapers, including fixed and variable times, and elaborates on the loading method known as back-track loading.

    Learning Practice

  • 2.2.2

    Chain Loading

    This section details the concept of cycle time in scrapers, including fixed and variable components, optimal loading strategies, and the importance of haul and return times.

    Learning Practice

  • 2.2.3

    Shuttle Loading

    This section elaborates on the various components that determine the cycle time of a scraper, including fixed and variable times, focusing on loading dynamics and the importance of optimizing loading practices.

    Learning Practice

References

11 b.pdf

Class Notes

Memorization

What we have learnt

  • Cycle time consists of both...
  • Optimal loading practices e...
  • Haul route maintenance is e...

Final Test

Revision Tests