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分析了高速铁路隧道的阻力分布特征及通风压力计算模型,运用网络通风理论,结合典型工程案例计算了不同工况条件下隧道内各段的风速、风量分布。结果表明:高速铁路隧道的通风竖井距离隧道出入口较近时,会在隧道出入口形成通风短路,使得区间隧道内的纵向排烟风速受到影响;在隧道洞口设置射流风机,能够增强区间隧道内纵向排风效果,有效解决分段式纵向通风短路问题,保证火灾上游人员的安全疏散及消防救援。
The distribution of resistance and calculation model of ventilation pressure in high-speed railway tunnel are analyzed. The distribution of wind speed and air volume in each section of tunnel under different working conditions is calculated by using network ventilation theory and typical engineering cases. The results show that when the ventilation shaft of high-speed railway tunnel is close to the entrance and exit of the tunnel, the ventilation short circuit will be formed at the entrance and exit of the tunnel, which will affect the longitudinal smoke exhaust velocity in the tunnel. Setting the jet fan in tunnel entrance can enhance the longitudinal row Wind effect, effectively solve the short-section vertical ventilation problems, to ensure the safety of evacuation firefighters upstream and rescue fire.