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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 a patented oil lifter allow them to be used in on-snore-mode over an extended period.

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