Broken Underground Sewage Pipe

[jakin]

At a wastewater treatment plant, a 70-year old 180ft long 12in dia. crock pipe, located nearly 40ft below ground and conveying wastewater from an underground tank (via a manhole) to a tunnel, was recently found to leak and need replacement. There are several utility lines in the top 10ft of soil at this facility. Any idea about the best way to design for this replacement would be appreciated.

 

[GeoPaveTraffic]

Can the damaged line just be slip lined?

 

[jakin]

Additional information: There is noticeable surface subsidence at the location of leak. A video recording of through the line shows the opening in the pipe is considerable. Someone had suggested pipe-jacking for replacement. What would this entail? Would slip lining maintain the integrity of the line?

 

[GeoPaveTraffic]

With slip lining the strength of the pipe is increased and if properly designed, there should be no further ground loss. The slip lining is continuous from one end to the other.

There are several companies in the US that do this kind of work, not sure about other locations.

 

[kmatte]

Jakin.

I just attended a seminar for pipe rehabilitation. The company is able to line the entire pipe. They can also fix individual holes with a grout patch. If you are in the midwest you can check out their website

http://www.visu-sewer.com/.

With the depth, and other obstructions this may be the cheapest fix.