| In order to overcome the constraints of the terrain, reduce the travel distances, improvetransport efficiency and the level of economic development, long tunnel is increasing in themountain area. The selection of tunnel ventilation mode not only directly affect theinvestment in the construction of the tunnel, but also affect the air quality in the tunnel and theoperational safety of the tunnel.Taking Tianshan extra-long tunnel as an example and combining with the existing tunnelventilation theory, this thesis useshe ventilation network theory to analyze four parallel tuunelventilation, including parallel tuunel air-supplied semi-transverse ventilation, parallel tuunelair-supplied sub-paragraph ventilation, parallel tuunel air-supplied ventilation(parallel tuunelis devived to three parts and incomplete to get through) and parallel tuunel air-exhaustedsemi-transverse ventilation. And then comprehensive evaluates various ventilation schemesaccording to the energy consumption and the effect of ventilation and rescue. Ultimately getsthe preferably suitable ventilation scheme for the form of a small traffic highway tunnel in thewestern region.Finally, establish the Tianshan tunnel evacuation simulation model for the optimalventilation scheme by using PyroSim simulation software. And make evacuation simulationsunder four different cross channel spacing conditions,then analyze the results of simulationbased on the the tunnel safe evacuation evaluation criteria and get the reasonable spacing. |
PDF Full Text Request