Large-scaled fire testing for long-sized road tunnel

摘要

The Qinling Long Sized Road Tunnel (Qinling Tunnel) is the longest road tunnel in China. It consists of two tubes (two-lane carriageway per tube) with each tube 18.0 km in length. The longitudinal forced ventilation mode is utilized and the tunnel is divided into four regions by three ventilation shafts. To investigate the behaviours of fire in tunnel and to propose an effective ventilation measure to fight fires in the Qinling Tunnel, two large-scaled model tunnel were established and a series of fire testing were conducted between 2001 and 2004. The testing titled testing Ⅰ was carried out to understand the general behaviour of tunnel fire, and another testing called testing Ⅱ conducted by the model tunnel with ventilation shafts was to investigate how various ventilation measures interact with fire in a long sized road tunnel, and to thereby propose effective ventilation measure to fight fires in the Qinling Tunnel. For testing Ⅰ, a total of 18 tests were performed, and for testing Ⅱ, a total of 33 tests were performed.