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Runehamar Tunnel Fire Tests - Uptun: Fire Protection
By Octavian Anton , Xiao Wu, Promat International NV , Belgium
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 Runehamar tunnel fire tests (Norway)
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PROMATECT®-T board has been used for fire protection in real tunnel fire tests in Runehamar tunnel (Norway) , tests organised within the framework of EU project Upgrading Existing Tunnels (UPTUN) with pre-designed conditions as shown in the Table 1 . |
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Where ,
- Test Commodity 1(TC1) – 600 corrugated paper cartons with interiors (600 mm x 400 mm x 500 mm ;
L x W x H) and 15 % of total mass of unexpanded polystyrene cups and 40 wood pallets,
- Test Commodity 2 (TC2)– 200 wood pallets and 200 PUR madrasses measuring 1200 x 1000 x 150 mm.
- Test Commodity 3 (TC3)- 320 wood pallets measuring 1200 x 1000 x 150 mm and 80 PE plastic pallets measuring 1200 x 800 x 150 mm,
- The furniture test will include about 7 – 8 tons of furniture.
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Due to irregular shape of the Runehamar tunnel , the PROMATECT®-T boards were installed suspended on a metal frame ; there is no direct contact between the board and the rock (Fig.5) . The tests were aimed between other parameters at measuring the performances of the fire protection in different fire conditions when no concrete structures are present (concrete contributes generally to fire resistance of products by a cooling effect), no joints protection exists and the boards were submitted to multiple exposures in successive fires . |
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Fig.5 - Designed fire protection system for the Runehamar tunnel fire tests : in red the metal frame on which the PROMATECT®- T boards were fixed |
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The figure 6 illustrates the temperatures developed
in the tunnel during the first fire test
Fig.6 - Temperatures measured during the most severe test (test # 1)
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( the red curve , temperatures indicated on right side) and the temperatures measured on the cold side of the boards (temperature values indicated on left side of the graph) .
The results demonstrate that the fire temperatures reach 1365°C in a normal fire (normal cargo truck) , no hydrocarbon fuel being used . The curve overlaps very well the hydrocarbon (very first minutes) and RWS fire curve (reaching 1350°C) up to 30 minutes. With this catastrophic tunnel fire, the maximum temperatures registered on the cold side of the PROMATECT®-T 1x25mm boards and 2x15mm boards were 210°C and 179°C respectively (to correctly consider the relation temperature / thickness of the boards see the location detailed here below) . These temperatures are far below the considered limit of 250°C , agreed by the partners of this project . Moreover , the proposed system was tested on laboratory scale previous to final decision (see presentation of Promat BV on this programme) . |
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Fig.7- Promatect-T stability after the test 1
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