Optimization and Air Supplement Study on the Position of the Ventilation Cross Passage in the No.1 Tunnel of Daliangshan
Daliangshan No.1 tunnel on the Leshan-Xichang Expressway is equipped with a through level guide and an inclined shaft.During operation,the level guide is used to supplement air to the main tunnel and reduce the design wind speed of the main tunnel.In order to explore the impact of the position of the supplementary air horizontal channel on the energy consumption of the ventilation system and make a reasonable supplementary air strategy,this paper adopts the ventilation calculation method based on the"Guidelines for Design of Ventilation of Highway Tunnels"(JTG/T D70/2-02-2014),to calculate the total power of the ventilation system under different positions of the supplementary air horizontal channel.The results show that:1)There is an optimal setting position to minimize the energy consumption of the ventilation system.2)The energy saving effect of air supply in the first section is significantly better than that in the second section.3)When the operating speed exceeds 50 km per hour,it is recommended to supplement air on the left line of the first section and close the remaining air supply channels.
long highway tunnelparallel guidesupplementary air strategyenergy saving
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