bridge repair

[4oaks]

I am repairing some wooden bridge pilings. I plan to slip a 12 inch diameter pipe over each of the 10 inch diameter wooden pilings. I would then like to fill the void between the wood and the steel with concrete, however, I have been told the concrete is corrosive and will damage the wood over time. I am looking for a material that I can use to fill this void that will cure underwater. any suggestions?

 

[Ron]

4oaks...you need to engage someone familiar with such repairs. Your void space is insufficient to used concrete and yes, the wood will rot within the concrete (though concrete is not corrosive and corrosion will not be your mode of failure).

There are epoxies that can be used for such composite repairs, however, you should reduce the void space between the casing and the pile to as small as practicable to lower the costs, since epoxies are relatively expensive.

The repair you are contemplating is beyond a DIY level!

 

[Tmoose]

How are the pilings damaged? Rotted, split and checked, something else.
Is they submerged? If so is the damage primarily above or below the water line?
Got a picture or 2?

http://docksaversinc.com/piling-repair-protection.html

If you have the superstructure remove to allow slipping a pipe over the piling could the pilings be replaced?

 

[paddingtongreen]

Are you going to apply the load to the pipe or is just to be a permanent splint over the damaged portion?

Michael.
"Science adjusts its views based on what's observed. Faith is the denial of observation so that belief can be preserved." ~ Tim Minchin

 

[bridgebuster]

Are these pilings part of a dolphin or a fender system? If so, you may not want steel pipe. Depending on how damaged the existing pilings are, you might be able to splice new timbers onto them.

 

[tbuelna]

Since it appears that you have access to place a steel pipe over the existing wood piling, why not simply cut off the wood pilings and replace them with steel members? Seems like far less hassle than installing steel pipe over each wood piling and then back-filling the void between them with concrete or epoxy.