The Vertiliner® manhole liner method is used to line vertical manhole structures, usually wastewater manholes, which can come in a wide variety of shapes and sizes. Angular, oval and walled manholes with major changes in cross-section are no problem thanks to this patented technique. If manholes are heavily damaged – fractured, cracked, misshapen or with missing wall parts or even mounts that are at risk of collapsing – Vertiliner® is a much more economical alternative to excavation and manhole renovation.
Results of the innovative patented Vertiliner® method:
In fact, the list of benefits is a long one.
Standard lengths: up to max. 11 m
Customised lengths: on request
Diameter: 0.8 m to max. 2 m
Component size all round: max. 6.3 m (non-circular cross-sectional shapes)
Section thicknesses: 6.3 mm to approx. 20.3 mm (corresponding to around 9 - 29 individual layers)
On average, it takes around 3 hours to rehabilitate a DN 1000 concrete manhole with a depth of 3.5 m, including fitting ladders or climbing rungs. There is no need for special measures to maintain drainage capability or water holdback in the main channel. Only the inflows in the manhole wall have to be shut off for a brief period of time.
The work steps in detail
Once the heights and diameter have been measured manually (using a folding rule or laser distance meter), the liner can be ordered. It is then installed at the construction site in 18 simple steps.
For its liner material, Vertiliner® uses high-quality ECR glass-fibre rovings impregnated with a light-cured synthetic resin. This will either be an unsaturated polyester resin (type 1140 group 3 in accordance with DIN 18820 Part 1) or a vinyl ester resin (type 1310 group 5 in accordance with DIN 18820 Part 1).
A single glass-fibre roving is a mere 0.7 mm thick. Multiple layers of these rovings – depending on the structural conditions, 7 mm for standard manholes – are wound one on top of another and laid in the manhole liner. The Vertiliner® is wrapped in a UV-resistant and water-repellent sealing foil from the outside, while the inside of the product is equipped with a light-permeable composite foil that is peeled off after installation.
Vertiliner® is a seamless single-piece tube that extends from the top of the raised gully to the roadway surface. The changes in cross-section present inside the manhole are always worked into the tube and the inliner is supplied to the construction site ready to install. The annular gap of around 0.10% of the liner radius is sealed using an EPDM rubber gasket or injection hose. The sealing gasket is positioned about 10 cm from the bottom end of the liner.