隧道衬砌受火温度的评估方法试验研究  

Testing Study on Estimation Method of Tunnel Lining Temperature in Fire

作　　者：姚坚[1] 朱合华[2] 闫治国[2] 强健[1] 

机构地区：[1]上海市政工程设计研究总院 [2]同济大学土木工程学院地下建筑与工程系,上海200092

出　　处：《地下空间与工程学报》2007年第5期883-888,共6页Chinese Journal of Underground Space and Engineering

基　　金：上海市科委科技攻关计划资助(04dz12010)

摘　　要：对三种隧道衬砌混凝土材料,即C50普通混凝土、CF50钢纤维混凝土和PC50聚丙烯纤维混凝土试块高温后的密度、超声波速、回弹值进行了试验研究。基于试验结果,分别建立了用密度比、超声波速比、回弹值比的单因素法以及综合法(两因素)评估温度的公式,并讨论了几种方法的精度和实际应用。这些结论为隧道衬砌结构火灾损伤和承载力评估提供了理论依据。In this paper, the tests on density, ultrasonic speed and rebound value of C50 concrete, CF50 steel fiber concrete and PCS0 PP fiber concrete after high temperature were completed. Based on the data of the test, one kind of the estimation equation of temperature was established by only single density ratio, ultrasonic speed ratio or rebound value ratio, the other was by two of the three ratios. Meanwhile, the accuracy and practical application of mentioned above method is discussed. The conclusions provide theoretic basis for damage and bearing capacity estimation of tunnel lining structures after fire.

关 键 词：隧道衬砌 纤维混凝土 受火温度 评估 试验研究 

分 类 号：U457[建筑科学—桥梁与隧道工程]