寒区隧道地基冻融变形的多场耦合数值模拟计算及应用  

Numerical Simulation Method and Its Applicationg to Foundation Deformation of Road Tunnel Due to Freezing-Thawing Process in Cold Regions

作　　者：白雪莹[1] 

机构地区：[1]同济大学地下建筑与工程系,上海200092

出　　处：《四川建材》2017年第3期74-76,共3页Sichuan Building Materials

摘　　要：为研究寒区隧道地基冻融变形情况,考虑水冰相变、水化热的作用,建立了隧道地基热-应力耦合计算有限元模型,以某寒区隧道的洞口段为计算对象进行了计算,研究结果表明,现有的寒区隧道保温技术在实际应用中对于冻土的保护不足,水分和隧道洞内的高低温变化是导致这一问题的主要原因。To analyze foundation deformation distribution of road tunnel in cold regions, a multi - field finite element model is established considering ice and water phase transition as well as hydrate heat. Through a detail calculation example with the section of a road tunnel in cold regions, the research result indicates that water content of ground and high air temperature in the tun-nel are main reason causing the frost - heaving and thawing - set-tlement deformation.

关 键 词：隧道工程 多场耦合模型 地基变形 冻胀融沉 

分 类 号：U451.2[建筑科学—桥梁与隧道工程]