Seal Non-Circular Annular Space
Seal Non-Circular Annular Space
(OP)
We have a project with a new 86" steel pipe penetrating a new large concrete vault. The design called for a pipe sleeve to be cast into the concrete structure and the annular space to be sealed with a modular compression sealing element (e.g. Link-Seal). The vault is about 15 feet underground and somehow the roughy 93" ID sleeve cast into the vault is "non-circular".
The annular space between the 86" pipe and wall sleeve is irregular enough that the compression element cannot expand enough in places around the entire circumference, so Link-Seal has indicated they cannot help us. We are looking for a reliable water-tight solution to help seal the irregular or non-circular annular space between the carrier and casing pipe (wall sleeve), which will have about 12 feet earth cover. Field dimension sheet attached that went to Link-Seal.
The annular space between the 86" pipe and wall sleeve is irregular enough that the compression element cannot expand enough in places around the entire circumference, so Link-Seal has indicated they cannot help us. We are looking for a reliable water-tight solution to help seal the irregular or non-circular annular space between the carrier and casing pipe (wall sleeve), which will have about 12 feet earth cover. Field dimension sheet attached that went to Link-Seal.





RE: Seal Non-Circular Annular Space
RE: Seal Non-Circular Annular Space
http://concretecuttingwisconsin.com/con-cor-specialty-services.html
RE: Seal Non-Circular Annular Space
Richard A. Cornelius, P.E.
WWW.amlinereast.com
RE: Seal Non-Circular Annular Space
As an alternative, I'd let them add a section of concrete 2'-0" larger than the opening on the outside of the wall with the correct sleeve cast in it. It will need to be doweled into the existing wall. Then link seal as designed.
I'd be very careful about rigging something up. Why let the contractor off the hook for sloppy work, especially when this will be leaking for a long time?
RE: Seal Non-Circular Annular Space