Renovation of the Tunnel des Nations

Pregny-Chambésy, Svájc

Referenciaszám: 4663

Kategória: Szállítás


Felhasználási terület	road tunnel
Hely	Pregny-Chambésy, Svájc
Alkategória	Alagút
Alkalmazás	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.
Kezdési és záró dátum	2017/2023
Alkalmazás típusa	Mélyépítés
Vállalkozó neve	ARGE Partner: Marti Construction SA, Meyrin \| Marti Tunnel AG, Moosseedorf
Beépítést végző cég	Renasco AG, Moosseedorf \| Renasco Geotechnik, Moosseedorf
Projektvezető	Canton of Geneva; DETA / DGGC, Petit-Lancy
MAPEI Koordinálás	Stefan Niederberger