寒冷地区隧道衬砌壁后冻融及其影响分析  

An Impact Analysis of the Freeze-Thawing Behind Tunnel Linings in Cold Regions

作　　者：吕康成[1] 马超超[1] 吉哲[1] 许鹏[1] 

机构地区：[1]长安大学公路学院,西安710064

出　　处：《现代隧道技术》2012年第5期29-33,共5页Modern Tunnelling Technology

基　　金：国家西部交通建设科技项目(200731881267)

摘　　要：文章在考虑围岩冻结渐进性和围岩渗水开放性的基础上,研究分析了冻胀过程以及伴随的融冻过程对隧道衬砌结构、初期支护喷混凝土和围岩自身强度等的影响。分析结果表明,对于按现行规范修建的隧道,发生在衬砌壁后的积水冻胀和围岩冻胀对衬砌结构施加的压力不大,设计时可不予考虑;发生在混凝土内部的反复冻融对初期支护的喷混凝土损伤显著,设计施工应予注意;寒区隧道宜重视对常见的因渗漏水引起的冻害的设防。Considering gradual freezing and water infiltration of surrounding rock, this essay discusses the influence of the frost heave process and the thawing process on the tunnel lining structure, concrete spraying for primary support, and the strength of surrounding rock. According to the current standard of tunnel construction, the pressure applied to the lining caused by water frost heaving and surrounding rock frost heaving is not big and need not be considered in the design process, while the damage to the sprayed concrete for primary support due to repeated freezing and thawing is significant. For tunnels in cold regions, attention should he given to the prevention of frost caused by water seepage.

关 键 词：寒区隧道 渗漏水 冻胀 消融 冻害 

分 类 号：U457.5[建筑科学—桥梁与隧道工程]