Construction Engineering & Management - Vol 2 | 8. Back-Track Loading Method by Abraham | Learn Smarter
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Knowledge
8. Back-Track Loading Method

The chapter discusses various loading methods used in construction, emphasizing back-track loading, chain loading, and shuttle loading, with a focus on their operational efficiencies and cycle times. It highlights the interdependence between scrapers and pushers, detailing the importance of balancing their numbers to minimize waiting times and maximize productivity. Key formulas for calculating cycle times and optimal loading practices for scrapers are also introduced.

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Sections

  • 1

    Back-Track Loading Method

    The Back-Track Loading Method is a widely used but slow loading technique where a pusher detaches and returns to load scrapers sequentially.

    Learning Practice

  • 1.1

    Introduction To Back-Track Loading

    Back-track loading involves a pusher returning to retrieve and push the next scraper after loading a previous one, making it the slowest but commonly used method in certain applications.

    Learning Practice

  • 1.2

    Limitations Of Back-Track Loading

    Back-track loading is the slowest method due to the time required for pusher return trips, yet it is preferred for maintaining consistent direction.

    Learning Practice

  • 1.3

    Preference For Back-Track Loading

    Back-track loading is a method where a pusher returns to load another scraper, though slower compared to other methods.

    Learning Practice

  • 2

    Chain Loading Method

    The chain loading method streamlines the loading process by allowing a pusher to push scrapers without backtracking, making it efficient for long and narrow cuts.

    Learning Practice

  • 2.1

    Introduction To Chain Loading

    This section discusses the chain loading method in scraper and pusher operations, which allows for continuous loading without backtracking.

    Learning Practice

  • 2.2

    Advantages Of Chain Loading

    Chain loading is an efficient method for transporting material with reduced return travel time, making it suitable for long, narrow cuts like roads.

    Learning Practice

  • 3

    Shuttle Loading Method

    The Shuttle Loading Method is a material transport technique that allows simultaneous operation in two directions, enhancing efficiency compared to traditional methods.

    Learning Practice

  • 3.1

    Introduction To Shuttle Loading

    Shuttle loading is a method of transporting scrapers in two fill directions, optimizing the loading process by minimizing return time.

    Learning Practice

  • 3.2

    Advantages And Use Cases Of Shuttle Loading

    Shuttle loading offers advantages in operational efficiency by reducing cycle time when two fill areas exist, as opposed to back-track loading which is slower due to longer return times.

    Learning

  • 4

    Comparison Of Loading Methods

    This section discusses three loading methods in construction: back-track loading, chain loading, and shuttle loading, highlighting their differences in speed and efficiency.

    Learning Practice

  • 4.1

    Cycle Time Analysis

    Cycle time analysis discusses various loading methods for scrapers and their impact on efficiency in construction.

    Learning Practice

  • 4.2

    Summary Of Loading Methods

    This section presents an overview of different loading methods for scrapers, including back-track, chain, and shuttle loading, highlighting their characteristics and cycle times.

    Learning Practice

  • 5

    Cycle Time Calculation

    The section discusses various loading methods for scrapers and their respective cycle times, focusing on back-track, chain, and shuttle loading methods.

    Learning Practice

  • 5.1

    Thumb Rule Formula For Cycle Time

    This section discusses three loading methods for scrapers, emphasizing their cycle times and efficiency, and introduces the thumb rule formula for calculating pusher cycle time.

    Learning Practice

  • 5.2

    Balancing Scrapers And Pushers

    This section discusses different loading methods for scrapers and pushers, focusing on back-track, chain, and shuttle loading techniques, each with its advantages and limitations.

    Learning Practice

  • 6

    Scraper Production Cycle

    This section explains the different loading methods in the scraper production cycle, focusing on back-track, chain, and shuttle loading.

    Learning Practice

  • 6.1

    Composition Of Production Cycle

    This section outlines the different loading methods in the production cycle of scrapers, explaining the back-track, chain, and shuttle loading methodologies.

    Learning Practice

  • 6.2

    Loading Time Consistency

    The section discusses various loading methods for scrapers, highlighting back-track loading as the slowest method, and introduces chain and shuttle loading methods that optimize efficiency.

    Learning Practice

  • 6.3

    Optimal Loading Time

    This section discusses different loading methods for scrapers, their efficiencies, and how to optimize loading times to enhance productivity.

    Learning Practice

  • 7

    Conclusion

    The conclusion compares various loading methods for scrapers, emphasizing their strengths and limitations.

    Learning Practice

  • 7.1

    Summary Of Key Points

    This section outlines various loading methods for scrapers used in construction, including back-track loading, chain loading, and shuttle loading, highlighting their characteristics and limitations.

    Learning Practice

  • 7.2

    Preview Of Next Lecture

    This section discusses different loading methods for scrapers, focusing on back-track loading, chain loading, and shuttle loading, highlighting their advantages and limitations.

    Learning Practice

References

11 c.pdf

Class Notes

Memorization

What we have learnt

  • Back-track loading is the s...
  • Chain loading is more effic...
  • Shuttle loading requires fi...

Final Test

Revision Tests