US Wick Drain of Leland North Carolina recently completed the world’s largest marine barge wick drain installation…over 12 MILLION linear feet. The wick drains will allow timely consolidation of marine sediments supporting dikes for the […]
This is the first time I have heard of this type of consolidation/permeability testing. I won’t try to summarize myself, here’s a bit of a description from their newsletter: Hydraulic consolidation cells, a.k.a. Rowe-Braden consolidation […]
[Update 2/10/08] Updated the name of the bridge. [/Update]
DelDOT is putting the new Indian River Bridge over out to bid. The current bridge is said to be in danger of failing between 2008 and 2012 according to the Army Corps of Engineers, seems to be related to scour. From what I hear, the tidal currents at that inlet being spanned over are tremendous, with water velocities on the order of 35 mph.
In 2005, Mactec, a geotechnical firm, provided a geotechnical report and associated recommendations to DelDOT for how to construct the 45-ft high approach embankments for a 1,400-ft long bridge in light of a 60-ft clay layer (sounds like pre-loading). However, the embankments are not settling as Mactec predicted (not sure if its more or less, probably less meaning slower) and are "shifting laterally" (squeezing?) so the DOT is going with a longer bridge to span the problem soil. More after the break.