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Phillips
USA
3 Posts |
 Posted - 02/25/2010 : 05:04:51
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We have a somewhat unique situation coming up soon. We have to fill in 2, 500 foot tunnels under a highway. They are about 36 inches in diameter and have a 10 inch sewer or water line in them. We need some ideas on how to fill these in.
We had come up with the idea of using 250 foot of heavy duty plastic pipe coupled to the end our our hose and running it half way in, and pulling it back through as it fills up, then going to the other side and doing the same. Ray didn't like this idea too much.
Any ideas would be helpful. Also a recommended mix design to go along with your idea would be nice. |
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Speedy
Canada
4194 Posts |
Posted - 02/25/2010 : 05:22:59
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Are the water and sewer lines active? If so, will they withstand pressure?
I guess this is an 'abandonment', so that they are not active, but you didn't specify. What is the 'tunnel' made of? Corrugated Iron Pipe (Culvert) ?
It's difficult to ensure that it is filled to the top.
No specific mix design, but fine sand, a little cement to kick it off, flyash, and a foaming agent such as: http://fritzpak.com/products/product_fill-flow.shtml
http://www.youtube.com/watch?v=BsLKJbMNkUE |
If you can't fix it with a hammer....you've got an electrical problem. |
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b.alto
USA
1001 Posts |
Posted - 02/25/2010 : 06:14:04
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| Heavy duty plastic pipe, as in schedule 40 bursting max is what? 80 PSI? What about just pulling a 2" or 2.5" hose in and pulling it out as you go? |
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terry
421 Posts |
Posted - 02/25/2010 : 06:36:19
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| We have did this before I think our farthest push was just over 300' horz. and maybe 10' rise. you can pump on the high side if you seal up both ends and put a breather tube on the low side but glue an elbow with a vert. pipe higher than your pumping point. It will purge the air and water and whatever else lives in there first. Then when your grout starts coming out solid you are good to go. We also glue a cheap ball valve on the side you are pumping into so you can shut it and unhook your hose without trying to stuff burlap or whatever into the pipe under pressure(very messy) We always came back a couple of days later on just whacked off the fittings with a hammer. |
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terry
421 Posts |
Posted - 02/25/2010 : 06:37:56
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| Forgot to say we run plastic pipe to about halfway distance in the pipe. |
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biged
3088 Posts |
Posted - 02/25/2010 : 13:00:47
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| Guys using plastic is asking for trouble your pump will pump at 800 psi the glued coupling will pull apart you are just wasting money and time If it was me I would seal both ends vent the one side and hook up your hose to the other and pump away its about 200 plus yards per 500 foot runs |
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Phillips
USA
3 Posts |
Posted - 02/25/2010 : 14:04:43
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We wouldn't use sch 40. That would be asking to get someone killed. This was the idea of the guy in charge of that job. His idea was to use some other kind of plastic that can withstand that amount of pressure. And it would be one solid piece after it connects to our hose. No glue joints.
By the way, these are not abandoned lines, these are new ones being installed. We are filling in around the new tiles.
The idea mentioned about using our own 2 inch has problems, first we have to get the hose ran all the way into a tunnel that a normal human cant easily fit in and drag a hose, then pulling it back is gonna be nearly impossible with the clamps catching on things. And if one were to somehow come lose... its gone for good. |
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b.alto
USA
1001 Posts |
Posted - 02/25/2010 : 14:31:45
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Eds way might work. If you cement in like a 5" pipe, then just pump it full with some rich, wet, pea rock mud. Get something signed that you are only the pumper, not a design engineer.
In case you lift the road or fill the pipes with concrete. |
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biged
3088 Posts |
Posted - 02/25/2010 : 15:14:02
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| First throw the 2 inch away never use less that 2 1/2 inch hose, I know you run and OLIN I think you are pumping grout,if the pipe is level start on either end you may not need more than one section of hose, plug the end so if you need to switch side if needed put a hose hook up on both sides and a vent on both sides so the air can get out, it will go better than you think,why do all the other guys get all the fun jobs. |
Edited by - biged on 02/25/2010 15:14:28 |
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terry
421 Posts |
Posted - 02/25/2010 : 17:16:40
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| Are you grouting an area between a 36" and say a 40" pipe? |
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Larkie
USA
143 Posts |
Posted - 03/03/2010 : 16:47:46
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'Yo,,Phillips: Done the highway undercrossing yet? How'd it go.
Get 'yer workorder signed.
--L |
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Godfather
USA
1909 Posts |
Posted - 03/03/2010 : 18:35:15
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This project is under I-75 in Ohio.
The annulus will take 116 CY of grout.
Only one chance to get it right.
Or you buy the Interstate.
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Topic |
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Pumping under a highway
