Taking the pain out of downtime

摘要

"Six hours later and we can start again. For the second time this week we have wasted a batch of mortar and lost hours cleaning blocked annular grout lines." Sound familiar? Shani Wallis visited a rail tunnel project outside Milan to get the latest on how some time wasting problems were being ironed out One of the most frequent and costliest losses of production time on a soft ground TBM operation is downtime to clear blocked annular grout lines. Another is breakdown of the mucking system be it derailment of muck trains or a fault trip on a continuous conveyor system. A third major contributor is the replacing of worn cutters and tools and cutterhead furnishings.