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Restoration waterproofing of a road tunnel service tunnel affected by seepage and mould, with DRYflex resin sealant injections from inside the structure.

The tunnel originally provided access to a Cold War bunker, built between 1969 and 1971. It was later converted into an escape tunnel from the road tunnel.

In order to restore it, all electrical components were dismantled. and then moss and mould were removed to expose the wall and identify exactly where water was seeping in.

Drytech technicians then carried out crack sealing injections, sealing the tunnel vault and walls.

The intervention was carried out between 8pm and 4.30am to minimise the impact on tunnel traffic.

Drytech vehicles near the service tunnel entrance