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Schwäbisch Gmünd Tunnel, Germany

The project:

Construction of a two-lane tunnel with escape galleries to provide a direct route through the town of Schwäbisch Gmünd without the inconvenience of traffic lights at crossings, etc.

Executing companies:

  • Company Baresel
  • Company Hinteregger+Söhne Bauges. mbH
  • Company Züblin
  • Company Ostu-Stettin

The problem:

Tunnel advance using tunnel boring methods; advance on a downhill gradient at some points; incursion of ground and fissure water to be expected; tunnel bore to pass under the River Rems. High mud content due to soluble mudstone, high risk of abrasion due to quartz content of the sandstone.

Our solution:

Approximately 30 KTZ and KTV pumps with motor ratings up to 7.5 kW are being employed. These pumps are sturdy, requiring little maintenance; if any additional ones are required these can be supplied immediately on call-off at any time.

In the event of abrasive and corrosive utilization, stronger wear and tear will take place naturally in certain components. With regards to the above application wear and tear can take place mainly in impeller, agitator, suction plate, shaft sleeve, oil ring, mechanical seal, pump casing, strainer, motor casing and discharge coupling. Depending on the working conditions the lifetime of those parts might vary significantly and can be shorter than the legal warranty period.
In this regard, please pay attention to our general terms and conditions that we also send to you by mail on request.