I-43 /Fox River Bridge Green Bay

[ImminentCollapse]

Let the fun begin.

IC

http://www.jsonline.com/news/traffi...after-dip-reported-b99106394z1-225168872.html

 

[msquared48]

Seems strange for the very localized settlement of, or failure of, only one or two of the concrete bent structures across the entire width of the bridge, considering the upgrades made recently. Hopefully they removed the old resurfacing material before installing the new.

Sink hole? It will be interesting...

Mike McCann
MMC Engineering

 

[oldestguy]

This local TV station web site appears to be pretty good for news.

Corrosion seems the cause.

http://www.wearegreenbay.com/1fullt...eased/d/1fulltext-news/4cNZWliEXkaY7rt3vqJhGA

 

[081IL062]

Problem was due to corrosion of steel piles supporting the concrete piers caused by local soil conditions. (

http://www.jsonline.com/news/traffi...reen-bay-dot-says-b99112046z1-226307681.html)

Plans for the repair can be founds here: ftp://ftp.dot.wi.gov/dtsd/hcci/plansandproposals/2013/10October_29/20131029001plan.pdf

Basically, saddling 4 of the existing piers with a combination of new drilled concrete shafts and post tensioned concrete. Steel girders on settled pier jacked back into alignment and shimmed.

 

[msquared48]

"caused by local soil conditions".

So none of the other piers are affected? It was that "local"?

Mike McCann
MMC Engineering

 

[bridgebuster]

To paraphrase the late Tip o'Neill: "all soil is local."

 

[TomDOT]

Mike - apparently the problematic "soil" in question was mostly spend casting sand which had been dumped there or used as fill.