Major project – “Gotthard”
St. Gotthard railway tunnel, Switzerland
New construction of the St. Gotthard railway tunnel: 57 kilometers in length, the longest railway tunnel in the world.
Around 130.000 m² dimpled sheet type ISO-DRAIN eco 20 in use!
ISO-DRAIN dimpled sheet as a soil layer
ISO-DRAIN eco 20 is ideally suited for tunnel construction, cause there is a high burden in case of cleft- and groundwater. As a partition between shotcrete and tunnel ISO-DRAIN eco 20 offers positive characteristics.
Overview of advantages:
- high drainage efficiency
- safe diversion of the water into the existing drainages and seepage layer
- extremely resistant
- usable as „lost formwork“