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 that kind of dangerous behavior, but I must admit that it is neat to see a tunnel nearing completion after several years of work. [Source: YouTube]
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New Tunnel Project In Peru Through Andes
From ENR:
In the mountains of Peru a tunnel-boring machine named “Pacha Mama†is grinding through the heart of the Andes under rock as deep as 6,890 ft. It is carving away at a 20.2-kilometer-long tunnel through the South American Continental Divide to deliver water to arid coastal farmland.
This is a really interesting project, known as the Los Olmos project, and a nice little article. Normally for a civil tunnel project you drill geotechnical holes beforehand to know what kind of material you’re dealing with. In this case, because of the depth, they don’t have that luxury, so all decisions will be made on the fly. The depth of the tunnel creates some very challenging rock mechanics and logistics problems as well! (Illustration by Odebrecht)
California Geologic Survey publishes deep-seated landslide susceptibility map
Video: The 2012 Geo-Wall Competition
The 2012 Geo-Competition was held at the Geo-Congress 2012 conference in Oakland, California. Teams from 17 universities competed in a competition to construct a model mechanically stabilized earth (MSE) retaining wall out of craft paper […]