Renovation of the Tunnel des Nations

Location icon Pregny-Chambésy, Switzerland
N.º de ref.: 4663
Categoría: TRANSPORTE

Construcción

Yarda road tunnel
Ubicación Pregny-Chambésy, Switzerland
Subcategoría TUNNEL
Aplicación 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.
Fecha de inicio y finalización 2017/2023
Tipo de aplicación Construcción subterránea
Empresa contratista ARGE Partner: Marti Construction SA, Meyrin | Marti Tunnel AG, Moosseedorf
Empresas instaladoras Renasco AG, Moosseedorf | Renasco Geotechnik, Moosseedorf
Gestor de proyectos Canton of Geneva; DETA / DGGC, Petit-Lancy
Coordinación de MAPEI Stefan Niederberger

Producto usado en el proyecto

DYNAMON SX 14 CH
DYNAMON SX 14 CH
Product not available for this market,
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MAPEJET SYSTEM LP
MAPEJET SYSTEM LP
Product not available for this market,
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VISCOFLUID JET 5000
VISCOFLUID JET 5000
Product not available for this market,
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