衬砌混凝土火灾损伤调查分析及处置措施  

Investigation of fire damages to the concrete lining of a passage and measures for its rehabilitation

作　　者：马建秦[1] 陈万春[1] 

机构地区：[1]长安大学公路学院,西安700064

出　　处：《现代隧道技术》2005年第4期50-54,59,共6页Modern Tunnelling Technology

摘　　要：铜-黄公路某通道衬砌混凝土在火灾中遭受了严重损伤,且其损伤是不均匀的。根据残留受火混凝土的颜色、裂隙发育特征及疏松程度,将其损伤程度划分为轻度损伤、中等损伤、严重损伤和破坏等4个等级,以此作为拟定处置措施的依据。火灾后通过挂网、喷射混凝土对损伤衬砌进行了补强,由于采取了有效的施工措施,确保了施工期间的安全运营,取得了良好的加固补强效果。Based upon the damage features of the lining concrete of a passage tunnel on Tong-Huang highway after a fire, it was concluded that the lining concrete sustained damage in varying degrees that could be classified into four categories ： gently damaged, moderately damaged, seriously damaged and thoroughly damaged according to their colors and fractural features. Based upon the damage degrees, measures for strengthening the lining concrete with fire damages were proposed by using shotcrete and steel mesh. Measures were also taken during rehabilitation which insured the security of the operation of the passage and brought about good effect of strengthening.

关 键 词：衬砌混凝土 火灾损伤 处置措施 公路通道 

分 类 号：U457.6[建筑科学—桥梁与隧道工程]