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HomeNewsMiscellaneousGeotechnical Engineer Dives to Inspect Bridges

Geotechnical Engineer Dives to Inspect Bridges

September 3, 2008 rockman Miscellaneous Comments Off on Geotechnical Engineer Dives to Inspect Bridges

{mos_ri} 

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  • bridge inspection
  • Colwyn Sayers
  • scour
  • Stantec
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Emergency Repair of Allegheny River Lock No. 6

June 12, 2009 rockman Project Related Comments Off on Emergency Repair of Allegheny River Lock No. 6

Severe erosion was discovered on an October 2008 inspection of Allegheny River Lock and Dam No. 6 near Pittsburgh, PA, a US Army Corps of Engineers structure. In the Q1 2009 issue of PileDriver Magazine […]

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Evaluation of Bridge Scour Research: Geomorphic Processes and Predictions
Available Resources

Evaluation of Bridge Scour Research: Geomorphic Processes and Predictions

May 24, 2011 rockman Available Resources Comments Off on Evaluation of Bridge Scour Research: Geomorphic Processes and Predictions

TRB’s National Cooperative Highway Research Program (NCHRP) Web-Only Document 177: Evaluation of Bridge Scour Research: Geomorphic Processes and Predictions explores the impact of long-term aggradation and degradation, and lateral river channel migration, on highway structures. […]

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Project Related

Deleware Forced to Redesign Unfinished Bridge Because of Consolidation Issues

January 25, 2008 rockman Project Related Comments Off on Deleware Forced to Redesign Unfinished Bridge Because of Consolidation Issues

[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.

[…]

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