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]
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Video: Golder’s Tunneling Solution in Toronto for Difficult Ground Conditions
Golder Associates posted the video below describing some of their work on the York University Subway Tunneling Test Monitoring Project, part of the larger Toronto-York Spadina Subway Extension Project in Toronto, Ontario, Canada. The tunnels […]
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Backfilling the 1931 Tucker Tunnel in St. Louis with Geotechnical Fill, Geofoam Blocks
Constructed in 1931 by the Illinois Terminal Railroad, the Tucker Tunnel is located underneath Terminal Boulevard in downtown St. Louis. Over the years, the tunnel condition has deteriorated and the concern is that the failure […]
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Project Profile of Devil’s Slide Tunnels
This is a great piece that covers a lot of ground about the project. The author included information on the background of the original highway, and a nice discussion of the political aspects that drove […]