Devil’s Slide Breakthrough Video and Links

October 4, 2010 rockman Project Related Comments Off on Devil’s Slide Breakthrough Video and Links
Road header breaking through at Devil's Slide Tunnel

Photos and Video

Coastside Video has a video showing the breakthrough from farther away, but they also pan around so you can see the impressive bridges on the north approach to the tunnels which is very nice.

Links

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Excavation and ground freezing by Moretrench for MTA's Second Avenue Subway
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Ground Freezing and Tunneling for New York MTA’s Second Ave Subway

February 21, 2011 rockman Project Related Comments Off on Ground Freezing and Tunneling for New York MTA’s Second Ave Subway

GeoPrac sponsor Moretrench is a key team member of the Second Avenue subway team, performing ground freezing on a 150-ft stretch of tunnel alignment in preparation for the second tunnel. ENR reports that approximately 7,200 […]

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The Claremont Tunnel – Designed to Survive Fault Rupture on the Hayward Fault

June 24, 2008 rockman Project Related Comments Off on The Claremont Tunnel – Designed to Survive Fault Rupture on the Hayward Fault

The Claremont tunnel beneath the Berkeley Hills on the east side of Oakland is a water supply tunnel that serves over 800,000 customers in Richmond, Oakland, San Leandro and neighboring communities. One of the unique things about the tunnel is that it crosses the active Hayward Fault. Most of the time when you talk about designing for earthquakes you’re talking about designing to withstand the seismic forces. In this case, the designers needed the water transmission tunnel to withstand up to 7.5-ft of offset due to fault slip and still maintain a minimum level of service. (Photo credit: Sue Bednarz, Jacobs Associates, Inc. by way of Civil Engineering Magazine)

This post describes the relatively recent Claremont Tunnel Seismic Upgrade Project as reported in Civil Engineering Magazine (May 2008, v. 78, no. 5, pp 58-63, 96-97).

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