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California Pfeiffer Canyon Bridge damaged by rains/earth

California Pfeiffer Canyon Bridge damaged by rains/earth

RE: California Pfeiffer Canyon Bridge damaged by rains/earth

That section of California Highway 1 has experienced lots of problems. It is tough road building country.

RE: California Pfeiffer Canyon Bridge damaged by rains/earth

Aw... more hairline cracks...

Dik

RE: California Pfeiffer Canyon Bridge damaged by rains/earth

Just guessing from the photos, but it looks like the base of that column has moved down the hill.

RE: California Pfeiffer Canyon Bridge damaged by rains/earth

Yeah, and I swear I see curvature in the topmost foot or two of the column, suggesting that the base may have moved quite a lot.

Mike Halloran
Pembroke Pines, FL, USA

RE: California Pfeiffer Canyon Bridge damaged by rains/earth

The article JAE posted said it had shifted laterally. Looks like the connection to the superstructure is also torqued.

Mike McCann, PE, SE (WA)


RE: California Pfeiffer Canyon Bridge damaged by rains/earth

If I had bothered to read the article instead of just looking at the pictures, I would have seen the statement that "the base of the column moved downhill" due to the landslip.

RE: California Pfeiffer Canyon Bridge damaged by rains/earth

(OP)
Going to have to replace it.
From this view I'd have to agree.

Check out Eng-Tips Forum's Policies here:
FAQ731-376: Eng-Tips.com Forum Policies

RE: California Pfeiffer Canyon Bridge damaged by rains/earth

Anyone know what type of foundation was used on the pier that slid down the hill?

RE: California Pfeiffer Canyon Bridge damaged by rains/earth

Thanks Berkshire.... That 2nd article had much better pictures to show the extent of damage.

RE: California Pfeiffer Canyon Bridge damaged by rains/earth

Wow! That shows a lot of vertical movement.

Yep. Definitely replace here - no patch and sack.

I wonder if concrete arch on augercast pile or caissons further up the hillside would work better...

Mike McCann, PE, SE (WA)


RE: California Pfeiffer Canyon Bridge damaged by rains/earth

Two lines in that article made me smile:

"I can't really state in what direction it may be moving."

"It's unknown at this point how the existing structure will be demolished."

I suppose the spokesman was taking a less simplistic view than I was.

A.

RE: California Pfeiffer Canyon Bridge damaged by rains/earth

I would expect that the "existing structure will be demolished" in due time, even if they do nothing but wait for the effects of Mother Nature and gravity. As for the "direction it may be moving", may I suggest that it's probably DOWN.

John R. Baker, P.E. (ret)
EX-Product 'Evangelist'
Irvine, CA
Siemens PLM:
UG/NX Museum:

The secret of life is not finding someone to live with
It's finding someone you can't live without

RE: California Pfeiffer Canyon Bridge damaged by rains/earth

Cars should only cross it now at a very high rate of speed.

Keith Cress
kcress - http://www.flaminsystems.com

RE: California Pfeiffer Canyon Bridge damaged by rains/earth

"Cars should only cross it now at a very high rate of speed"

That bump that the bridge experiences when the cars hit the other side of the dip in the roadway should accelerate the deterioration and possibly help with the demolition. winky smile

TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! https://www.youtube.com/watch?v=BKorP55Aqvg
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RE: California Pfeiffer Canyon Bridge damaged by rains/earth

"Shivers said explosives are not an option for environmental reasons."

I'm as green as they come. But if the goal is to just get the thing to collapse, it seems like a few carefully placed shape charges would be just the ticket.

RE: California Pfeiffer Canyon Bridge damaged by rains/earth

With the instability of the base, just a kicker charge a few feet above the ground surface and on the opposite side of the direction of sliding should suffice.

Mike McCann, PE, SE (WA)


RE: California Pfeiffer Canyon Bridge damaged by rains/earth

Agreed. Their idiotic wrecking ball scheme is for the birds. In our town which got hammered by the Loma Prieta quake our most iconic building (The Cooper House) got some damage, the dread X cracks. There were about 12 retail boutiques, a wine cellar, and a restaurant in it. Authorities were so worried it would collapse at any second (4 stories of masonry, huge marble stairways) that they wouldn't even allow the shop owners to retrieve their cash registers and papers.

They decided to use a wrecking ball to bring it down and predicted 1 to 2 days. It took weeks of beating on it!

Their 'environmental concern' is par-for-the-course along that iconic coast. I did a complex surface-water drinking system for a $25M house that hung over the ocean. The walkway to the filtration house was a narrow concrete path down a fairly steep slope. The path skirted the cliff being perhaps 6 inches from a 700 foot drop to Pacific Ocean. There was no handrail what-so-ever. Eventually the owners put up a handrail for about 20 feet at the closest-to-the-ocean approach. A month later a lady driving by on HWY1 chance glimpsed a few feet of the handrail from the highway in a specific spot more than 100 yards away and only along about 20 feet of the highway and reported it to the "authorities". The home owners were run thru the wringer for damaging the view.

Keith Cress
kcress - http://www.flaminsystems.com

RE: California Pfeiffer Canyon Bridge damaged by rains/earth

Just need to get the slide going again, "naturally" to avoid environmental damage.

Aren't chemical explosions natural reactions?

Mike McCann, PE, SE (WA)


RE: California Pfeiffer Canyon Bridge damaged by rains/earth

Quote:

With enough force and some luck the structure will collapse.
Well, what engineering project would be complete without a good dose of luck!

Dan - Owner
http://www.Hi-TecDesigns.com

RE: California Pfeiffer Canyon Bridge damaged by rains/earth

Wouldn't it be possible to use traction on a cable strung between the two center columns to cause it to collapse?

STF

RE: California Pfeiffer Canyon Bridge damaged by rains/earth

That look did not work for me, but this should:Link

RE: California Pfeiffer Canyon Bridge damaged by rains/earth

Indeed. Nice it didn't pivot forward and take the excavator with it.

Keith Cress
kcress - http://www.flaminsystems.com

RE: California Pfeiffer Canyon Bridge damaged by rains/earth

Watch some youtube videos and they mention that it cost some 20 M to do the job. Ouch. My business is surely on the wrong continent on planet earth. It would have taken us three days of scanning, drilling and restricted blasting to do this job. And if they paid us only 4 M, We would have smiled all the way to the bank. The wrecking ball makes more noise then restricted blasting.

RE: California Pfeiffer Canyon Bridge damaged by rains/earth

I presume the $20M includes cleanup.

RE: California Pfeiffer Canyon Bridge damaged by rains/earth

It's ~$21 million for demolition and a brand new bridge.

RE: California Pfeiffer Canyon Bridge damaged by rains/earth

That sounds more reasonable.

John R. Baker, P.E. (ret)
EX-Product 'Evangelist'
Irvine, CA
Siemens PLM:
UG/NX Museum:

The secret of life is not finding someone to live with
It's finding someone you can't live without

RE: California Pfeiffer Canyon Bridge damaged by rains/earth

Agree, I check again, seems they plan to built a span bridge. Then it make sense.

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