Modern traffic tunnels are increasingly planned for a functional
service life of more than 100 years. For this reason they must be
protected extensively against the effects of groundwater and water
penetrating through rock fissures. The construction and sealing
specifications are correspondingly strict, especially with respect to
the required service life.

The level of hydrostatic pressure and the agressiveness of the water
determine the scope of the protection required for the construction of
underground structure measures. Also, for ecological reasons, there is
an increasing desire to limit the drainage of mountain water. There are a
broad range of opportunities, technical as well as economic, for
selecting the most suitable protection system. Each tunnel requires a
specific solution; depending on construction details, such as cut and
cover construction projects, varying water agressiveness, transition
sections of in-situ water under pressure and seepage water.

Sealing does more than just protect important structures against
corrosion. The tunnel suitability (e. g. prevention of icing) as well as
the stability itself requires a protection against moisture. In
comparison to the total costs of constructing a tunnel, the costs of
providing a functional waterproofing is minor – but the advantage to be
gained is major. Sealing protects and safeguards the structure. It
reduces maintenance costs and repairs. Therefore waterproofing is an
indispensable part of any tunnel construction.

A long-term, trouble-free tunnel operation with low operating and
maintenance costs can be achieved with a professionally installed
sealing system. In addition, a tunnel’s sealing system will actively
contribute to environmental protection, despite the need for the
construction of the tunnel, by avoiding interference with the mountain’s
hydrological water balance. The sealing system will also prevent
environmental damage from oils or chemicals which may occur due to
traffic accidents.

These important requirements are satisfied reliably and economically
with the NAUE waterproof sealing system. NAUE offers complete
single-source systems for tunnel construction, from manufacturing to
installation including full quality assurance.