Abstract: The phenomenon of crossflow and its nature were analyzed in detail, and the engineering measures for solving the problem of crossflow were proposed. Meanwhile, the effective degree was quantitatively analyzed and the concept of crossflow measures efficiency was put forward. The measures about setting ventilation horizontal hole or skylight were set into four categories: fresh air supply in upstream tunnel, polluting gases exhaust in upstream tunnel, fresh air supply in downstream tunnel, polluting gases exhaust in downstream tunnel. The correctness of the quantitative analysis was verified by an instance of simulation using fluent software. The conclusion shows that the effective degree of fresh air supply in downstream tunnel is much better than that of the other three.

Key words: tunnel engineering, tunnel ventilation, anti-crossflow, engineering measures, the crossflow measures efficiency, quantitative analysis, numerical simulation

摘要： 分析了短距离公路隧道窜流现象和窜流比的本质，提出了解决窜流问题的工程措施，定量分析了其有效程度，并提出窜流措施有效率的概念；将设置通风横洞或天窗的通用工程措施分 为上游隧道送新风、上游隧道排污风、下游隧道送新风和下游隧道排污风等4大类，利用Fluent软件通过实例模拟验证了定量分析的正确性。结果表明：4种措施中下游隧道送新风的有效程度 最高。

关键词: 隧道工程, 隧道通风, 防窜流, 工程措施, 防窜流措施有效率, 定量分析, 数值模拟