Grouting work done earlier in the week was a possible cause of a bulge in the lining of a train tunnel under the River Thames. Two trains hit the bulge before the line was closed, but neither train derailed. [Source: New Civil Engineer]
Project Related
Seattle tunnel will go under 158 buildings
The tunnel replacing the Alaskan Way Viaduct (SR-99) will pass beneath 158 existing structures requiring an extensive program of vibration and settlement monitoring as well as some remediation. Of the 158 buildings, WSDOT identified 20 […]
Project Related
Devil’s Slide Tunnel video from a renegade bicyclist
A bicyclist went around the barricades at the California Highway 1 Devil’s Slide Tunnel project after work hours and rode his bike through one of the tunnels, recording video as he went. I don’t advocate […]
Standards and Codes
US House Passes National Tunnel Inspection Program
The US House of Representatives passed legislation approving a national tunnel inspection program. This of course came about as a result of a fatal accident from 2006 in a tunnel on Boston’s Big Dig project where a concrete ceiling tile fell on a car killing one person. More after the break.