What it involves

Pipe lining is the rehabilitation or reinforcement of pipes without excavation. Hybrid systems are bespoke solutions that use a combination of methods and materials to provide a solution for a specific project.

Hybrid systems typically involve combinations of steel cages, rubber tube sections and CIPP lining.

Our Service 

Solutions typically include a combination of one or more of the following:

  • Factory engineered steel cages in sections that can be fabricated in-situ; rigid or jacked against pipe wall
  • Overlapping rubber tubes secured against host pipe
  • CIPP liner constrained within steel or other cage system.

Our Process

  • Prefabricate off site, in sections that can be safely hand carried through existing access chambers
  • Bring to site in batches that can be installed within each working shift
  • Set-up flow monitoring, early warning systems for flow and gas, outline safe system of work and rescue for pipe man entry
  • Install all relevant layers working from:
    • The sewer wall in accorance with safe entry and exit requirements
    • The chamber chosen in accordance with safe entry and exit requirements

Requirements

  • Safe man entry and exit routes
  • 6-8 hours’ site access; multiple shifts generally required depending on installation length
  • Over-pumping / tankering for high flows
  • 750mm – 3000mm diameter

When to use hybrid systems and their benefits

  • Hybrid systems are only appropriate when conventional techniques have been ruled out and a no dig solution is the only viable way forward One of the major benefits of the application is the low thickness, which enables a minimal reduction in the diameter of the host pipe, typically around 6% of the cross-sectional area
  • The steel and rubber sewer lining systems are frequently used as temporary reinforcement and protection systems. They ensure structural and hydraulic integrity when other works, for example tunnelling or piling, have a high risk of causing structural damage to the sewer. They typically have a design life of circa 5 years and can be removed in sections. The sectional removal enables safe inspection and identification of any structural defects that may have occurred in the host pipe, facilitating repair before the remaining sections are removed
  • Steel and CIPP lining combinations can have full design lives of 70 years plus, and are generally used to restrain or route a CIPP liner through major diameter changes, large voids or to facilitate a significant diameter reduction in a deep sewer with restricted access
  • Lateral connections can be enabled with specially designed top hat systems

Why choose McAllister Bros for Hybrid lining systems

People – Our senior staff have direct experience of installing various hybrid systems in recent years

Partners – The bespoke nature of these schemes requires close consultation and collaboration with designers and manufacturers. Our track record of innovation and product development enables us to choose the most appropriate and knowledgeable people to work with and create mutually beneficial relationships for all parties

Experience – Systems thinking and engineering are key to the success of these systems. Our track record of investigating and understanding both the network and system the solution will be used in, aligned with the operational issues which the solution will need to overcome, gives us a steal on the competition. We are solutions focused yet will not commit to manufacture and install a system unless we are 100% convinced it will work!