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Glue it Back Together

03/10/2017 2:45 PM

Why does this shot from Oroville make me nervous?

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#1

Re: glue it back together

03/10/2017 2:57 PM

it's been reported that dam repairs are running just under $5 million per day

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#2
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Re: glue it back together

03/10/2017 3:42 PM

unfortunately... a case like this, project cost isn't negotiable.

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#3

Re: Glue it Back Together

03/10/2017 3:42 PM

They are probably using 2k epoxy which at 12000 psi, is stronger than the concrete. I hope they are getting it in deep as possible.

I have used something similar when joining new concrete to old concrete. Drill 12" deep holes, blow out dust, squirt in epoxy, stick rebar in. I was told that process is as strong as sinking an L bar in wet concrete.

This was demonstrated to us at the yard I worked at with a 2 cubic yard block of concrete, they made the rookies, (myself) drill 2 holes 6" apart, we glued a "u" shaped piece of rebar into the holes. A week later, the operator picked it up with an excavator and shook it while suspended. The rebar deform to a v shape and almost tore in half, but the epoxy held. That block weighed about 8000lbs.

What I am saying is, as long as they are doing it right, this is a long lasting and strong repair.

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#4
In reply to #3

Re: Glue it Back Together

03/10/2017 3:51 PM

It's not the epoxy that makes me nervous. What makes me nervous is that I can see in this low resolution picture other cracks that are neither paint marked for repair or already filled with a bonding agent.

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#10
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Re: Glue it Back Together

03/10/2017 10:32 PM

What should make us nervous are the cracks deep in the dam that can't be seen/reached/repaired!! This surface treatment is just as effective as a bandaid on a GSW.

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#11
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Re: Glue it Back Together

03/10/2017 10:37 PM

I haven't read if any sonic testing has been performed but I doubt it

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#5
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Re: Glue it Back Together

03/10/2017 3:56 PM

there is no question that when the area is prepped correctly and temp, humidity drying time etc. are followed that thr epoxy is super strong but water flowing in the millions of gallons over a spillway has a way of exposing screw ups. to me this like having the old car with 200K on it, why spend endless money when it keeps breaking down? they got their 50 years now the choices seem stupid and wasteful.

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#6
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Re: Glue it Back Together

03/10/2017 4:21 PM

What makes me nervous is I see no compressed air lines. They need to be injecting the epoxy as deep as possible. Dude with a putty knife ain't getting it.

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#7
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Re: Glue it Back Together

03/10/2017 4:31 PM

I did say "CORRECTLY"

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#8
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Re: Glue it Back Together

03/10/2017 4:39 PM

No Sir, you did not. 12000 psi epoxy is only good when it is securely stuck to something. It's California, who knows what they are doing.

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#9
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Re: Glue it Back Together

03/10/2017 5:53 PM

Because they need something fairly quick to deal with spring runoff, without necessarily pretending that it will be a long-term repair.

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#21
In reply to #9

Re: Glue it Back Together

03/11/2017 10:41 AM

We all know that a temporary repair will become permanent if it doesn't cause trouble. In this case trouble will show up when it is too late!

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#22
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Re: Glue it Back Together

03/11/2017 11:22 AM

I take it you never live a life where you were indebt over your head with no foreseeable way out and had no choice but to drive a old high mileage vehicle.

The problem is because like most people who are in debt over their heads and drive old 200K mile vehicles they can't afford to "buy a new one" right now or any time soon.

Especially when when right now they are the equivalent to being 1000+ miles from home so for the time being its fix what they can to keep it going until more viable options can be looked at.

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#23
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Re: Glue it Back Together

03/11/2017 11:35 AM

Don't get wrong I'm a longtime fan of "beaters" but if this dam fails the impact to lives is enormous. I'd rather see it taken out of service until a well engineered spillway was in place to act as the main regulating mechanism for water height and pressure. the point of the thread is this Band Aid approach might get them through the runoff season but millions of gallons of rushing water have already demonstrated their destructive potential. I think it's a gamble. lets all hope they can limp this wounded dam past Spring

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#25
In reply to #23

Re: Glue it Back Together

03/11/2017 2:30 PM

Unfortunately a dam like this where it is isn't something that can just be parked beside the garage until further repairs are able to be done.

Once it's in place and running it's rather has to stay that way until the new design is ready to be put in place.

Which for a large a scale public works project such as this in california, it could take 1 - 2 decades and a billion plus dollars of burned up taxpayers money just for the all the bureaucratic and environmentalists red tape to be payed off before the first guy who actually does something to the dam takes his first shovel full of dirt in order to actually start fixing the real problem that needed immediate attention right now today.

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#27
In reply to #25

Re: Glue it Back Together

03/11/2017 8:33 PM

B-But then we'll have to sacrifice our high speed rail line.

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#28
In reply to #27

Re: Glue it Back Together

03/11/2017 8:47 PM

Well if they gave up their cell phones for a week and sent that weeks cellphone bill money in to pay for it they could have the dam fixed the right way with money to spare.

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#29
In reply to #28

Re: Glue it Back Together

03/11/2017 9:03 PM

for the record I don't have an electronic dog leash, you have to email me if you want something

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#13
In reply to #3

Re: Glue it Back Together

03/10/2017 11:02 PM

Don't worry too much. It just a flesh wound.

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#20
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Re: Glue it Back Together

03/11/2017 10:36 AM

Before I retired (we designed storage systems anchored to the floor), we usually specified expansion anchors; but another option, especially close to edges, was epoxy anchors which were a rod set in a hole with epoxy. (They were made by others, so I don't know what grade of epoxy.)

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#12

Re: Glue it Back Together

03/10/2017 10:44 PM

There's reason to be scared. It's California. The concrete is actually granola.

The're injecting local honey from the farmers market which accounts for the 5 million a day repair number.

They plan to cover the cost of the repairs while lowering the level of the lake by bottling and selling the water to residents as quickly as possible.

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#26
In reply to #12

Re: Glue it Back Together

03/11/2017 5:18 PM

Honey??? They should use molasses, they used it as mortar down here. Some has been in service for over 200 yrs.

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#14

Re: Glue it Back Together

03/11/2017 9:14 AM

May I suggest to employ a 3-D Printer to fix the damn dam?

In a world gone crazy over 3-D printers it wouldn't be a stretch...

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#15
In reply to #14

Re: Glue it Back Together

03/11/2017 9:18 AM

that's a bit large

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#16
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Re: Glue it Back Together

03/11/2017 9:26 AM

So, manufacture a large enough printer to handle the fix. Naturally, it will be Made in Red China and will cost many times the cost of the dam repairs.

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#17
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Re: Glue it Back Together

03/11/2017 9:33 AM

screw that I want American made!

hope the leg is doing well

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#18
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Re: Glue it Back Together

03/11/2017 9:44 AM

Will you settle for water-soluble Kalifornia-made white glue. That way it will wash out faster than that crappy soil they have built the dam with.

Thanks for the well wishes Fredski. 5 weeks out from the surgery and healing slowly thank you. The incision site is still tender, especially after the Doc removed the stitches this past Wednesday. YouuuOUCH!

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#19
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Re: Glue it Back Together

03/11/2017 9:54 AM

You're a big boy you can tough it out

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#30
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Re: Glue it Back Together

03/12/2017 10:39 AM

Oh hell yeah, I've been through much worse, like the Army Docs picking Cuban grenade fragments out of my leg....

Grenada was a walk in the park.

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#24

Re: Glue it Back Together

03/11/2017 1:38 PM

Because these men are getting ready to put their heads between their knees, and kiss themselves goodby.

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#31

Re: Glue it Back Together

03/12/2017 8:51 PM

We Can Do This!

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#32

Re: Glue it Back Together

03/13/2017 7:55 AM

I'm surprised they haven't tried Flexseal tape - it works just fine in the commercials!

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#33
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Re: Glue it Back Together

03/13/2017 9:35 AM

Now that would be one he;; of an endorsement.

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#34
In reply to #32

Re: Glue it Back Together

03/13/2017 11:42 AM

Good luck getting FlexSeal to stick to anything other than fingers.

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#35
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Re: Glue it Back Together

03/13/2017 11:51 AM

Hey, don't bash Flexseal, you can make a boat out of screen with it. I saw it on TV, so it must be true.

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#36
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Re: Glue it Back Together

03/13/2017 11:57 AM

Yes, but I tried sealing up a leaking, cracked bird bath with it, and it will not stick to concrete.

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#37
In reply to #36

Re: Glue it Back Together

03/13/2017 12:12 PM

You didn't put screen on it, did you?

If they cover the whole spillway with screen and spray flexseal on it will be good as new. Just ask Phil Swift.

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#38
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Re: Glue it Back Together

03/13/2017 1:09 PM

LOL - good ol' Phil.

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#39
In reply to #32

Re: Glue it Back Together

03/13/2017 1:37 PM

the guy on cr4 who always carry duct tape must be there

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#40
In reply to #39

Re: Glue it Back Together

03/13/2017 1:41 PM

I always carry duct tape, but I'm not there.

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#41
In reply to #40

Re: Glue it Back Together

03/14/2017 10:26 PM

Oh, I forgot his pseudo name. But his Icon was a bulldog not a husky like yours.

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#42

Re: Glue it Back Together

03/17/2017 7:55 AM

CA -- like SEA is a tectonically active area -- i guess they are also with limited budget

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