项目Renovation of the Tunnel des Nations，Pregny-Chambésy |马贝


场地	road tunnel
位置	Pregny-Chambésy, 瑞士
子目录	隧道
施工	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.
开始和结束日期	2017/2023
施工类型	地下建筑物
承包商公司	ARGE Partner: Marti Construction SA, Meyrin \| Marti Tunnel AG, Moosseedorf
安装公司	Renasco AG, Moosseedorf \| Renasco Geotechnik, Moosseedorf
项目经理	Canton of Geneva; DETA / DGGC, Petit-Lancy
马贝协调员	Stefan Niederberger

场地

road tunnel

位置

Pregny-Chambésy, 瑞士

子目录

隧道

施工

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.

开始和结束日期

2017/2023

施工类型

地下建筑物

承包商公司

ARGE Partner: Marti Construction SA, Meyrin | Marti Tunnel AG, Moosseedorf

安装公司

Renasco AG, Moosseedorf | Renasco Geotechnik, Moosseedorf

项目经理

Canton of Geneva; DETA / DGGC, Petit-Lancy

马贝协调员

Stefan Niederberger