Civil Engineering Reference
In-Depth Information
Reinforced concrete inner lining
Omega seal
Debonding layer
Joint gap
Inner shell
Annular ring
Outer shell
Welded stirrup bars
Bulkhead plate
Rubber gaskets
Steel tunnel immersion joint-flexible joint (section through wall)
Construction joint
Reinforced concrete continuous
inner lining
Void
Welded plate
Inner shell
Bulkhead plate
Rubber gaskets
Outer shell
Steel tunnel immersion joint-rigid joint (section through wall)
Rubber gasket
Steel limit stop
Rubber gasket
Rubber gasket arrangement before compression
Figure 10.3
Components of immersion joints—steel tunnel.
A number of Gina gaskets are available off-the-shelf. In selecting the
appropriate Gina gasket, the following need to be considered with regard
to its movement capacity:
• Force-compression characteristics
• Modiication of the seal characteristics over time due to creep and
relaxation
• Initial and overall compression
• Effect of local tolerances
• Residual compression capacity required once all other effects have
been taken into account
