淮安大学学报

针对跨海长大隧道超长距离以及高浓度粉尘与有害气体极易沿隧道轴向弥漫、积聚，难以快速排出的通风难题，以象山石浦港海底隧道为依托，创新提出分区式清洁通风模式。通过构建污染物迁移演化数值模型，系统分析了传统与新型通风方案下多相污染物的分布规律。结果表明：传统通风中爆破粉尘扩散不受控，随隧道掘进通风效率显著下降；新型通风模式利用风幕隔尘技术，可有效将粉尘扩散阻隔于爆破掌子面核心作业区范围内，降低粉尘的轴向弥漫，作业区通风时间仅为传统方案的75%，且其性能几乎不受长度影响，改善了传统压入式通风在此方面的局限性。研究成果为复杂环境下隧道施工通风提供了有效解决方案。

Aiming at the ventilation challenge that high-concentration dust and harmful gases are prone to diffuse and accumulate axially along ultra-long cross-sea tunnels and are difficult to discharge rapidly,a zonal clean ventilation mode is innovatively proposed based on the Shipu Harbor Subsea Tunnel in Xiangshan. By constructing a numerical model for pollutant migration and evolution,the distribution characteristics of multiphase pollutants under traditional and novel ventilation schemes are systematically analyzed. The results show that the diffusion of blasting dust is uncontrolled in traditional ventilation,and the ventilation efficiency of the tunnel driving face decreases significantly. In contrast,the novel ventilation mode adopts air curtain dust isolation technology,which can effectively confine dust diffusion within the core working area near the blasting face and mitigate axial dust diffusion. The ventilation time required for the working area is only 75% of that of the traditional scheme,and its performance is almost unaffected by tunnel length,overcoming a key limitation of traditional forced ventilation. The research findings provide an effective solution for tunnel construction ventilation under complex environmental conditions.