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  Tunnel challenges – the Datwyler Sealing Solutions - Surface challenges – Underground solutions

  Datwyler Sealing Solutions is a leading supplier of customized sealing gaskets for modern tunneling applications. In 1969 Datwyler introduced comb-shaped compression gasket profiles, followed in 1974 by hollow chamber gaskets, and then in 1996 created double row sealing gaskets. Today Datwyler continues to develop and define the future in the field of sealing gaskets for tunneling. One of the common challenges of modern tunneling is compensating for variations in the offset between lining segments. With the new DatBalance product line, restoring forces are kept near-constant despite varying offset conditions. Thus, constant sealing performance is obtained within the defined offset-range. In this paper, we show our innovative solutions to overcome the surface challenges. We analyze and test the gaskets in the specific process media. Simulations are performed with new material parameters concerning load deflection and water tightness to predict the improvement. We improve the material by using new optimized rubber compounds and different surface treatments of the gaskets. Then prototype gaskets are analyzed and tested to insure water tightness with varying load deflections and ambient media conditions.

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