The Christ Church City Council has issued a notice banning entry to over 500 homes because of risks associated with rockfall, landslides, cliff collapse and other geotechnical problems exacerbated by recent earthquakes. [Source: Scoop News]
Project Related
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).
Links
AllExperts.com – Robert Cummings, P.E.
All answers from AllExperts.com by my colleague Robert Cummings, P.E. of Saguaro GeoServices, LLC of Tucson. He’s an expert in geological engineering, rock blasting and geotechnical engineering. I was impressed to see he has over […]
In Memoriam
Crux acquired by Quanta Services
Specialty geotechnical drilling contractor, Crux Subsurface, Inc. of Spokane, Washington was acquired Quanta Services (NYSE: PWR), an S&P 500 company and a leader in infrastructure services for the electric power, pipeline and telecommunications industries according […]