January 4, 2017
Tunnelling technology is seeing major developments that will boost construction efficiency - Mike Woof writes
Both in tunnel drilling and TBM systems, new machines are now being built that offer major gains in performance. Sandvik is introducing a number of major new models developments to its tunnelling drill range. Three new tunnelling jumbos are now available that suit different drilling requirements, the DD422iE, DT912D and DT922i.
The firm says that its advanced DD422iE rig offers major advantage