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Lainz Tunnel, contract section LT31, Austria

The Project:

Construction of a 4km two-track railway tunnel in Vienna

Executing companies:

ARGE LT31 consisting of:

Hochtief Construction AG

Alpine Bau GmbH

Beton- und Monierbau GmbH

The problem:

Water removal from both tunnel tubes during tunnelling works (through loose rock). 5 emergency exit shafts, 30 to 55m deep. Quarrying areas 132 and 145 m2, 6 to 20m beneath existing buildings.

The solution:

Multiple submersible pumps from the KTV, KTZ and LH series. The special characteristics of Tsurumi pumps,such as an internal mechanical seal, upstream shaft sleeve with gasket and an oil lifter allow them to be used in on-snore-mode over an extended period.

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.