高性能混凝土抗隧道火灾爆裂剥落研究现状综述  

Review of the research status of high performance concrete anti-tunnel fire spalling

作　　者：朱平华[1] 于树奇 刘文影[1] 孙远乾 ZHU Pinghua;YU Shuqi;LIU Wenying;SUN Yuanqian(Department of Civil Engineering,Changzhou University,Changzhou 213164 China)

机构地区：[1]常州大学土木工程系,江苏常州213164

出　　处：《混凝土》2018年第7期24-29,共6页Concrete

基　　金：国家自然科学基金资助项目(51678080;51678081)

摘　　要：首先从强度等级、湿含量、配筋率、截面尺寸和受火方式等主要影响因素入手,归纳总结了现有高性能混凝土(High Performance Concrete,HPC)抗隧道火灾爆裂剥落的研究成果,指出降低HPC湿含量可有效降低其高温下的爆裂剥落几率。其次阐述了HPC高温下的3种爆裂剥落机理及其计算方法,认为现有机理与计算方法有待完善。然后从防火涂层入手比较了HPC隧道防火措施的优劣,指出气凝胶砂浆涂层是未来隧道HPC结构防火的发展方向。最后提出了HPC隧道火灾研究的主要关键问题,包括界定高温爆裂机理的特征参数,提出基于结构全寿命周期成本理论的最优涂层技术等。Firstly,the main factors of high temperature bursting of concrete caused by strength grade,wet content,reinforcement ratio,cross section size and fire way were summarized.The results of research on the fire extinguishing of existing high performance concrete were summarized,wet content can effectively reduce the high performance concrete high temperature burst probability.Secondly,three kinds of bursting mechanism and calculation methods of high performance concrete under high temperature were explained,and the existing mechanism and calculation methods need to be improved.And then focus on the fire retardant coating to analyze the high performance concrete tunnel fire prevention measures,aerogel mortar coating is the first choice of fire prevention measures in the future.Finally,the main key problems of high performance concrete tunnel fire research are proposed,including the characteristic parameters of the high temperature burst mechanism were defined,and the optimal coating technology based on the whole life cycle cost theory was proposed and so on.

关 键 词：隧道 火灾 剥落 防火涂层 综述 

分 类 号：TU528.01[建筑科学—建筑技术科学]