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单向坡特长公路隧道通风系统区别于人字坡隧道的特点在于其左右洞需风量不平衡,上坡隧道的需风量远大于下坡隧道。为了设计单向坡隧道的通风系统,计算了左右洞需风量,分析了其特点及设计过程中应考虑的因素,并对土建构造物的设计要点进行了研究,得出上坡隧道以稀释烟雾的需风量控制,且远大于下坡隧道,以稀释空气中异味控制的需风量;上坡隧道可采用竖井或斜井分段纵向通风模式,以降低隧道主风道内的风速至经济风速区间内;下坡隧道可采用经济节能、控制简单的纯射流风机纵向通风模式;上坡隧道的排风风道宜联通下坡隧道,作为下坡隧道火灾时排烟;单向坡隧道的通风竖井、斜井及地下风机房等应尽可能布置于上坡隧道的外侧。
One-way slope extra long highway tunnel ventilation system distinguishes itself from the humanoid slope tunnel characterized by unbalanced air volume between the left and right holes, and the upwind tunnel needs much more air than the downhill tunnel. In order to design the ventilation system of the one-way slope tunnel, the required air volume of the left and right holes was calculated, the characteristics and the factors that should be considered in the design process were analyzed, and the design points of the civil structure were studied. Of the need for air flow control, and much larger than the downhill tunnel, in order to dilute the amount of air required odor control; uphill tunnel shaft or inclined section can be used longitudinal ventilation mode to reduce the main wind tunnel to the wind speed within the economic wind range ; Downgrade tunnel can be economized on energy, simple control of pure jet fan longitudinal ventilation mode; uphill tunnel ventilation ducts should Unicom downhill tunnel, as a downgrade tunnel fire smoke; one-way slope tunnel ventilation shaft, Inclined shaft and underground wind turbine room should be arranged on the outer side of uphill tunnel as far as possible.