Sanitary Sewer Rehab
Sanitary Sewer Rehab
(OP)
I have a client with cast iron (4" & 6") interior sanitary and storm sewers under a corridor of a mid rise apartment complex. The 20 year old sewers have corroded due to salt ground water (next to a salt water bay).
A contractor has proposed pipe bursting to replace the existing truck line. The laterals will be excavated at the mains and CIPP would be installed until the lateral is above grade.
I would like to know if any one has had any experience in piping breaking in type of application.
A contractor has proposed pipe bursting to replace the existing truck line. The laterals will be excavated at the mains and CIPP would be installed until the lateral is above grade.
I would like to know if any one has had any experience in piping breaking in type of application.





RE: Sanitary Sewer Rehab
KRS Services
www.krs-services.com
RE: Sanitary Sewer Rehab
RE: Sanitary Sewer Rehab
Thanks
RE: Sanitary Sewer Rehab
KRS Services
www.krs-services.com
RE: Sanitary Sewer Rehab
RE: Sanitary Sewer Rehab
KRS Services
www.krs-services.com
RE: Sanitary Sewer Rehab
KRS Services
www.krs-services.com
RE: Sanitary Sewer Rehab
RE: Sanitary Sewer Rehab
I believe the definitions that are used may be somewhat different but essentially mean the same. I know that I have seen the term horizonal directional drilling in these threads before and have assumed they mean the same as the terms I use. I think we are essentially speaking about the same techniques.
Coring - Hydraulically pulling a plug and pipe through soils.
Pit and core - coring over smaller distances and hand pushing pipe. Usually completed to rehab water mains and the "pits" are opened up at each service location. Very efficient replacement methodology when asphalts are in good shape and not in need of replacement.
Augering - Horizonally augering (drilling) through soils and pulling pipe behind. Simple, straight runs.
Directional drilling - Similar to augering but more expensive due to the equipment used. I've used directional drilling to install HDPE pipe within escarpment areas (under rivers and stream basins).
KRS Services
www.krs-services.com
RE: Sanitary Sewer Rehab
RE: Sanitary Sewer Rehab
It is a two fold process. The pits are excavated on each side of the job. On one end the bursting tool is fed through the pipe and the pipe is minimally fractured. Once the tool is through, a special attachment is connected and the tool is pulled back and the new pipe is pushed with it. In this process, the old pipe is also "pushed" and it essentially extruded into a hopper. It is a slow process, but very effective. I have seen the process on a couple of jobs where the pipe was under a major arterial road and open cut was not an option.
KRS Services
www.krs-services.com
RE: Sanitary Sewer Rehab