【摘要】 本文采用不同火灾温度场与不同燃烧时间对隧道衬砌混凝土和构件进行实际 烧损的试验手段，探讨了衬砌在高温作用后力学性能的变化规律与损伤程度；分析了隧道高温受损后，衬砌残余强度与超声波速之间的关系，以及超声法检测技术用于测试隧道火灾损伤的适用性和可靠性。更多还原

【Abstract】 By using burning experiments under different fire temperature and different ablazing time for the concrete structure of tunnel lining, the variation in mechanical properties and the damage degree of the lining structure after high temperature action are examined. The relation between the remaining strength of the lining and the velocity of ultrasonic wave propagating in it is also discussed. The applicability of ultrasonic detective technique used for fire damage estimation of tunnel lining is then analyzed.更多还原