Gas-Permeable Seal Test - Tunnel sealing

Site preparation for the GAST project : Sealing of the water conducting features, cutting of the plug seat, preparation of the tunnel floor and the tunnel rail and casting.

GAST experiment, Grimsel - Sealing of water conducting features
Sealing of water conducting features

GAST experiment, Grimsel - Sealing of water conducting features
Sealing of water conducting features

GAST experiment, Grimsel - Cutting of plug seat
Cutting of plug seat

GAST experiment, Grimsel - Cutting of plug seat
Cutting of plug seat

GAST experiment, Grimsel - Cutting of plug seat
Cutting of plug seat

GAST experiment, Grimsel - Cutting of plug seat
Cutting of plug seat

GAST experiment, Grimsel - Preparation of tunnel floor
Preparation of tunnel floor

Metal framework with the cabling for the measurement instrumentation for the GAST
Metal framework with the cabling for the measurement instrumentation for the GAST experiment (© Comet Photoshopping)

GAST experiment, Grimsel - Tunnel rail and casting
Tunnel rail and casting

Gas-Permeable Seal Test (GAST)

The GTS underground facilities are also available to interested 3rd parties for underground testing and research. The GTS offers cost-effective access to a fully developed, well characterised underground research facility with round the year logistical support - please contact Dr. Ingo Blechschmidt, Head of the Grimsel Test Site, for further details.