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Hanekleiv Tunnel : ウィキペディア英語版 | Hanekleiv Tunnel
The Hanekleiv tunnel is a road tunnel in Vestfold, Norway, one of seven along the European route E18 between Sande and Holmestrand. The tunnel became the centre of controversy on 25 December 2006 when part of the roof collapsed, and investigations revealed that several tunnels on the E18 through Vestfold were insufficiently secured. The tunnel was fully reopened on August 30, 2007. ==Technical details== The tunnel is 1,765 metres long and has two tubes, one for each direction of travel and each accommodating two lanes of highway. The tunnels were opened for traffic on 30 October 2001.〔(Tunnel Avalanche Aftermath ) Aftenposten, December 27, 2006, retrieved April 20, 2007〕 The rock which the tunnel is built through is frequently unstable. To compensate for this, the tunnel roof and walls were reinforced at places with bolts and concrete injections, however the tunnel was not equipped with concrete walls throughout the length of the tunnel. The E18 tunnels in Vestfold had about 17,000 vehicles pass through them each day.〔(Focus on tunnels ) Aftenposten, April 11, 2007, retrieved April 20, 2007〕
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