Waterproof lining in underground structures Alv Hanstvedt - PowerPoint PPT Presentation

Waterproof lining in underground structures Alv Hanstvedt Technical Director Hydrovision 2012, New Dehli

Content page: 1. Company 2. Products 3. Corrosion problem associated with humidity in underground env. 4. Solutions to avoid humidity 5. Successful projects 6. Q/A

• Company

Main Office. Bergen, Norway Main office Bergen W. Giertsen AS established in 1875

• We are involved in projects, world wide. • International, our business is based on cooperation with local contractors.

•Products

• WG Tunnel Arch • WG Tunnel Sealing • Based on more than 30 years experience. • Most of our systems and methods are all patented.

Rock downfall

Fire • The fabric is self extinguishing in case of fire and does not propagate the flames • There is no after glow • Fire documentation from Norway (NBL), Sweden (SITAC/SP) and Finland (VTT) • New fabric solution is made in cooperation with the Norwegian Road Departement

Full-scale fire test 25 MW fire, comparable with five fully-burning cars Result: No flash-over!

•Corrosion Problems

Humidity = Corrosion

Alternative method ????

• Solutions to avoid humidity

The relation between speed of corrosion and the relative humidity (RH) mg/dm 2 120 100 80 60 40 20 0 40 50 60 70 80 90 100 % RF

High humidity increaces bacteria growth By keeping the relative humidity below 50%RH, the bacteria growth is reduced significantly.

• Successful projects

Protecting values

Powerhouse Dale Kraftverk - BKK

Powerhouse

Transformer room

Transformer tunnel

WG Tunnel Sealing Access tunnel, defense Submarine maintenance Storage, defense Storage, defense

Access aera

Roundabout in rock

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