Terracon posted a new blog post about a unique hybrid soil nail and anchored soldier pile wall excavation support system for the Tower 12 Building project in Downtown Seattle. The project involves a 60-foot deep excavation for underground parking, but the west side of the excavation was adjacent to an existing 20-story building with three levels of below-grade parking. The hybrid system involved tightly spaced soil nails in the upper portion of the excavation wall and steeply-inclined, high-capacity ground anchors (200 kip) to support the lower portion. Check out more details on this interesting project from Terracon.
According to Silicon Valley’s MercuryNews.com, a [very lucky] worker suffered minor injuries when the crane he was opperating toppled down an embankment. The accident apparently occured on a CALTRANS project as the crane was lifting a 10,000-lb pile when a "wood retaining wall" gave way. It sounds like they were constructing a soldier pile lagging wall with steel h-pile soldiers and wood lagging. (Photo by Donna Jones/Sentinel)