【摘要】 针对高海拔隧道和水下隧道因建设条件、地理条件和环评要求等因素影响不便修建竖、斜井的问题，提出了平行导洞—分段纵向通风系统。在隧道通风理论的基础上，推导了适用于该通风系统的设计参量的计算公式；同时结合隧道通风设计程序，给出了从隧道分段位置确定、设计风量计算、设计参数初始值计算到污染物浓度校核的设计流程，从隧道长度限制和需风量，初步分析了混合通风方式的适用条件。结合工程案例，给出了混合通风方式的实际应用方案，方案在不修建竖井的前提下，结合集中排烟通道很好地解决了火灾人员逃生问题，具备实际可行性，为今后穿越高海拔和跨海公路隧道的通风设计提供了新思路。更多还原

【Abstract】 In view of the inconvenience of building vertical and inclined shafts due to factors such as construction conditions, geographical conditions and environmental assessment requirements for high-altitude tunnels and underwater tunnels, this paper proposes a parallel pilot tunnel-section longitudinal ventilation system. On the basis of the tunnel ventilation theory, the calculation formula of the design parameters suitable for the ventilation system is deduced. At the same time, combined with the tunnel ventilation design procedure, the paper gives the design process from the determination of the tunnel segment location, design air volume calculation, design parameters initial value calculation to pollutant concentration calibration. From the tunnel length limit and the required air volume, the paper initially analyzes the applicable conditions of the mixed ventilation method. Combined with the engineering case, the practical application scheme of mixed ventilation is given. Under the premise of not building a shaft, the scheme can solve the problem of fire escape by combining the centralized smoke exhaust channel, which has practical feasibility. The scheme solves the problem of escape of fire personnel under the premise of not building a shaft and combined with a centralized smoke exhaust channel. It has practical feasibility and is practical for crossing high altitude and the ventilation design of the cross-sea highway tunnel provides a new idea.更多还原