火灾后隧道衬砌混凝土力学性能及微观结构实验研究

消防科学与技术 ›› 2022, Vol. 41 ›› Issue (3): 325-329.

火灾后隧道衬砌混凝土力学性能及微观结构实验研究

徐俊涛1，王强1，朱凯1，黄亚东2

（1.中国计量大学质量与安全工程学院，浙江杭州 310018；2.浙江省消防救援总队，浙江杭州 310005）

出版日期:2022-03-15 发布日期:2022-03-15
作者简介:徐俊涛（1993-），男，浙江台州人，中国计量大学质量与安全工程学院硕士研究生，主要从事超声混凝土无损检测研究，浙江省杭州市下沙高教园学源街258号，310018。
基金资助:
浙江省重点研发计划项目（2018C03029）

Experimental analysis of mechanical properties and microstructure of tunnel lining concrete after fire

XU Jun-tao1, WANG Qiang1, ZHU Kai1, HUANG Ya-dong2

(1. College of Quality and Safety Engineering, China Jiliang University, Zhejiang Hangzhou 310018, China; 2. Zhejiang Fire and Rescue Brigade, Zhejiang Hangzhou 310005, China)

Online:2022-03-15 Published:2022-03-15

摘要/Abstract

摘要： 为研究火灾后隧道衬砌结构的损伤程度和性能特征，对火灾后隧道衬砌混凝土进行抗压强度试验和超声检测，分析不同受火时间（2,3,4 h）下，隧道衬砌混凝土剩余抗压强度和超声波声速变化的规律。结果表明：200~800 ℃范围内，不同受火时间下，受火温度和剩余抗压强度、超声波声速和剩余抗压强度都有较好的线性关系，且随受火时间增大，超声波声速和抗压强度逐渐下降；扫描电镜试验说明受火温度、剩余抗压强度和超声波声速三者之间存在良好的相关性。此外，建立了200~800 ℃区间范围内，3种不同受火时间下隧道衬砌混凝土抗压强度、受火温度、和超声波声速的计算模型。

关键词: 隧道火灾；衬砌混凝土；抗压强度；超声检测；损伤评估

Abstract: In order to study the damage degree and performance characteristics of the tunnel lining structure after the fire, the compressive strength test and ultrasonic inspection of the tunnel lining concrete after the fire were carried out, and the residual resistance and the law of pressure intensity and speed of ultrasonic sound of the tunnel lining concrete under different fire time (2,3,4 h) was analyzed. The results show that: in the range of 200~800 ℃, under different fire time, the fire temperature and residual compressive strength, ultrasonic sound velocity and residual compressive strength have a good linear relationship, and with the increase of fire time, the ultrasonic sound velocity and compressive strength gradually decrease; Scanning electron microscopy-SEM shows that there is a good correlation between fire temperature, residual compressive strength and ultrasonic sound velocity. In addition, three calculation models of tunnel lining concrete compressive strength, fire temperature, and ultrasonic sound velocity in the range of 200~800 ℃ under different fire time have been established.

Key words: tunnel fire; lining concrete; compressive strength; ultrasonic testing; damage assessment

徐俊涛1，王强1，朱凯1，黄亚东2. 火灾后隧道衬砌混凝土力学性能及微观结构实验研究[J]. 消防科学与技术, 2022, 41(3): 325-329.

XU Jun-tao1, WANG Qiang1, ZHU Kai1, HUANG Ya-dong2. Experimental analysis of mechanical properties and microstructure of tunnel lining concrete after fire[J]. Fire Science and Technology, 2022, 41(3): 325-329.