摘要
隧道围岩冻胀变形机理是寒区隧道工程常见的问题之一。首先评述了国内外现有关于寒区隧道冻胀机理的几种解释,然后对采自西部某寒区岩样进行饱水冻结,通过CT扫描技术观察了岩体内部细观结构变化、水分迁移,发现了围岩冻结后发生收缩的现象,从细观角度研究了岩体的冻胀和收缩机理,完善和补充了围岩冻胀机理假说。
As is known to all that the freezing-heaving mechanism of tunnel surrounding rock is a common problem of the tunnel in the cold region. Firstly, the several existent theories about freezing-heaving mechanism are introduced and evaluated. Secondly, the freezing experiment of rock sample is mode; after saturated, the rock samples from a cold region in West China. The CT scanning technology is applied to measure the meso-structure change of rock sample and the water transfer within the sample. The shrinkage phenomenon in volume has been found after the rock sample frozen. Finally, the freezing-heaving mechanism of tunnel surrounding rock is studied, which is believable to be helpful to the tunnel in the cold region.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2007年第2期307-310,314,共5页
Rock and Soil Mechanics
基金
国家自然科学基金资助(No.40372119)
关键词
寒区隧道
围岩
冻结
CT扫描
损伤力学
tunnel in the cold region
surrounding rock
freezing
CT scanning
damage mechanics
