Qinling Nanshan Lengthy Highway Tunnel Ventilation Parameter Test Research

Generally empirical or code values have been taken up by civil engineers about the basis of parameters in highway tunnels ventilation computation, which usually is inconsistent with the practical projects, especially in extra-long tunnels. Therefore, it is necessary to test the basis of information and data for tunnel ventilation computation in situ. This paper based on the key projects such as the extra-long highway tunnel in Qinling mountains in Shanxi Province operating ventilation bottleneck technologies research. According to the extra-long highway tunnel in Qinling mountains in Shanxi Province practical projects, plentiful field tests have been made on special items-ventilation resistance factor and distribution rule of air temperature in the multi-shaft tunnels and climate changes between tunnel portals etc, which ensured the economic security for study of the extra-long highway tunnel in Qinling mountains with three vertical shafts longitudinal ventilation scheme.