Slip-Lining
Sliplining is one of the pioneering processes used in trenchless rehabilitation of pipelines. During the process, a new continuous liner of smaller diameter is placed inside the existing pipe. The area between the existing pipe and the new pipe, is typically grouted to prevent leaks and to provide structural integrity. Continuous grouting of this space provides a dependable seal.
In most sliplining applications, manholes cannot function as proper access points and it may be necessary to dig an insertion pit for each pipeline segment. Though not a completely trenchless technique, the excavation required is considerably less than that for traditional methods.
Pipe Re-rounding
Pipe Re-rounders are used to reshape PVC sewer pipe deflected up to 15% and restore it to within 1% of the original shape.
- A special re-rounding tool is mechanically drawn through the pipe, expanding deformed sections back into the correct shape.
- Immediately afterward, the pipe is given a new, rigid lining to provide a permanent repair.
Trenchless Pipe Repair p3
