上海长江隧道是当时世界上直径最大的盾构隧道之一，为保证其在火灾下的抗火安全性，从隧道结构设计、烟道板耐火设计、耐火混凝土配制、混凝土耐火性能评价等角度对隧道混凝土烟道板抗火性能进行研究。通过耐火试验对混凝土烟道板的抗火性能进行评估，结果表明所研制的隧道混凝土烟道板具有良好的抗火性能，耐火极限不低于30 min，火灾损伤评级为中度损伤（Ⅱ），符合隧道耐火设计要求，对提高隧道在火灾条件下的安全性具有重要意义。

The fireresistant performance of the concrete flue slabs used in Yangtze rivercrossing tunnel in Shanghai is studied in terms of tunnel structure design, flue slab fireresistance design, concrete mixing proportion and concrete fireresistant performance assessment, so as to guarantee the safety of the tunnel in case of fire. The fireresistant performance of the concrete flue slabs is assessed by means of fireresistance test. The test results show that the concrete flue slabs are good in fireresistant performance, which can improve the safety of the tunnel in case of fire.