One tunnel boring machine has made headway drilling a new 5,700-ft-long tube for the Chesapeake Bay Bridge-Tunnel, part of a $756-million project to eliminatie a longstanding bottleneck by connecting parallel above-water segments constructed in 1995 to carry southbound traffic.
Robotic arms for tunnel-boring machines, concrete reinforcement made of old wind turbine blades and machine learning to reduce concrete waste are among innovations emerging from the $16.7-billion civil construction program for the U.K.’s London to Birmingham high-speed railroad. Construction began late last year.
