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Train station Yerres

Retaining structures

Project name Train station Yerres Volume 300 m³ expanded clay 8-16 mm Location Yerres, France Year 2014
Contractor GTM TP IDF Designer ECE Owner/Builder SNCF


The SNCF is the national association of train transport in France. Therefore, they are also responsible for the management and maintenance of all train stations. Since the train tracks at the train station of Yerres are located at 8 metres height , there is an enormous pressure on the wall flanking the tracks. To reduce settlement and earth pressure, a lightweight yet strong filling material was requested.

Why Expanded Clay:

Because of it’s earth settlement reducing capacities, expanded clay aggregates turned out to be a perfect solution. But mainly the fact that the renovation works needed to be executed at 8 meters above sea ground level and over a length of 70 metres, made the contractor chose for expanded clay aggregates.


Blowing the expanded clay aggregates enabled the contractor to work in the fastest way as possible. Also, since the train station remained open during the works, the nuisance was limited because of the fast way of working.

Key Issues:

Blowing, Load reduction, and Settlement

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