Immersed Tunnels - Gina Gaskets, Omega Seals

The Gina gasket and Omega seal are used between the sectional elements of immersed tunnels to prevent water ingress due to external water pressure. This combination of seals not only allows for sealing but also for the transfer of the hydrostatic loads and movements between the tunnel ends due to soil settlement, creep of concrete, temperature effects and if required earthquakes. The designs are generally based on the expected tunnel lifetime of 100 years

Trelleborg is the specialist in the design of Gina gaskets and Omega seals. Trelleborg not only supplies these seals, but upon request also offers site assistance during installation. Since the early sixties Trelleborg has supplied a large number of seals for immersed traffic, cooling water, pipeline and cable tunnels in many countries all over the world.

Documents

GINA Gasket Product Information sheet [pdf]