Renovation of the Tunnel des Nations

Pregny-Chambésy, Švajčiarsko

Ref #: 4663

Kategória: DOPRAVA


Popis	road tunnel
Poloha	Pregny-Chambésy, Švajčiarsko
Podkategória	TUNEL
Aplikácia	The 491m long tunnel project crosses a built-up urban area at a shallow depth with difficult geological and hydrogeological conditions. During the tunnel excavation work, severe water ingress occurred despite the lowering of the groundwater level. In an initial phase, the tunnel excavation was stabilized with cement using conventional seals. Dynamon SX Injection, an additive for injection suspensions and injection mortar with an integrated pumping aid, and Viscofluid Jet 5000, a biodegradable polymer for increasing the viscosity and stability of cement suspensions, were used. In a second phase, the highly permeable gravel bodies and water-bearing layers with varying groundwater levels were drained from the surface of the tunnel by constructing an injection pile wall. In addition, the sealing in the tunnel had to withstand high water pressure after construction. For this reason, a two-layer vacuum system was installed.
Dátum začiatku a dokončenia	2017/2023
Typ aplikácie	Podzemné konštrukcie
Dodávateľská spoločnosť	ARGE Partner: Marti Construction SA, Meyrin \| Marti Tunnel AG, Moosseedorf
Realizačná spoločnosť	Renasco AG, Moosseedorf \| Renasco Geotechnik, Moosseedorf
Projektový manažér	Canton of Geneva; DETA / DGGC, Petit-Lancy
Koordinátor MAPEI	Stefan Niederberger