Trenchless rehabilitation is an amazing process not involving digging things up but whenever people think of sewer rehabilitation, they think of dug-up areas, whether roads, gardens, or pavements. It’s not only a time-consuming job but a disruptive and costly one, as damaged or broken pipes would need to be excavated along the entire length of the pipe to remove and replace it. Thankfully now, there are trenchless methods contractors can use to restore existing pipes without digging up the ground.
Many trenchless rehabilitation solutions have been introduced, including CIPP (Cured-in-place pipe), slip lining, and pipe bursting. Each method has the same goal; however, depending on equipment, time and money, the extent of the damage done will depend on what method will work suitably. So let’s go through the different types of trenchless rehabilitation.
CIPP Lining (Cured-in-place piping)
CIPP Lining is a way to repair an existing pipe with a textile liner and a liquid resin. It’s non-evasive and doesn’t require any ground removal! What happens with CIPP Lining is using either robotic cutting tools or high-pressure water technology to clean the existing pipe of any debris or blockages that have caused the damage, inserting a liner that has been mixed with a resin into the pipe and using air pressure, it is blown up inside the damaged pipe and then cured using UV light. By curing the lining, it hardens and becomes a newly strengthened pipe. Another robotic cutting tool will then be inserted into the pipe to reinstate any branch line connections.
Sliplining
Sliplining is a method used for repairing leaks or restoring the structural stability of an existing pipe. Sliplining inserts a smaller pipe into the larger host pipe, grouting the space between the two pipes and sealing the ends.
Pipe Bursting
The trenchless pipe bursting method replaces different pipe types, including concrete, steel, and clay. Using the existing pipeline as a guide, the pipe bursting method cuts through the pipe whilst pulling a new polyethene into place behind it.
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