Tunnel Boring & Heavy Civil Equipment worked example

Segment Handling Capacity at 99% segment feeder uptime: a worked example

This scenario runs the segment handling capacity calculation on the strong side: 99% segment feeder uptime, with every other input held at its documented default. Use it when segment handling capacity in tunnel boring and heavy civil equipment is being asked to take on more work and you need to know if there is room.

The inputs for this scenario

  • Segments handled per crane cycle: 4 units / cycle (unchanged)
  • Available handling cycles per period: 480 cycles (unchanged)
  • Segment feeder uptime: 99 % (raised for this scenario; the documented default is 90)
  • Damage-free (first-pass) segment yield: 97 % (unchanged)

Working through the calculation

  • Applying the documented formula (Gross segment handling capacity = segment handling capacity output per cycle × available segment handling capacity cycles) to the inputs above produces each figure below.
  • At this operating point the engine returns 1,844 units for good segment handling capacity, the number this scenario is built around.
  • At this operating point the engine returns 1,920 units for gross segment handling capacity.
  • At this operating point the engine returns 19.2 units for segment handling capacity downtime loss.
  • At this operating point the engine returns 57.02 units for segment handling capacity yield loss.

How this compares with the baseline

  • Against the tool's baseline example, where segment feeder uptime sits at 90% and the headline result is 1,676 units, this scenario comes in 10% above the baseline at 1,844 units.
  • Use it when planning segment logistics for a drive or diagnosing whether segment supply, not boring, is the constraint on advance rate. Treat this as a target state: the delta against the baseline quantifies what the improvement is worth before you commit to chasing it.

Results at a glance

  • Good segment handling capacity: 1,844 units (headline result)
  • Gross segment handling capacity: 1,920 units
  • Segment handling capacity downtime loss: 19.2 units
  • Segment handling capacity yield loss: 57.02 units

Run it with your numbers

  • Every input above is editable in the live Segment Handling Capacity calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.