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La Praz, Franze

The project:


LTF Lyon Turin Ferroviaire SAS

Railway tunnel underneath the Alps between France and Italy with a length of 52km.


Executing companies:

Spie Batignolles TPCI;

Ghella; Cogeis

CE2A (Tsurumi partner)


The problem:


Dewatering in the access gallery at La Praz. This has a length of 2,572m at a 12% incline.


The solution:


Implementation of type LH622 high-pressure pumps as a booster pump. Dewatering at the heading face is carried out using series KRS and KTZ pumps.

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.