岩石冻融破坏机理分析及冻融力学试验研究  

ANALYSIS OF MECHANISM OF ROCK FAILURE DUE TO FREEZE-THAW CYCLING AND MECHANICAL TESTING STUDY ON FROZEN-THAWED ROCKS

作　　者：徐光苗[1] 刘泉声[1] 

机构地区：[1]中国科学院武汉岩土力学研究所,湖北武汉430071

出　　处：《岩石力学与工程学报》2005年第17期3076-3082,共7页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家重点基础研究发展规划(973)项目(2002CB12704)

摘　　要：岩石的冻融破坏是寒区岩石工程中常遇到的主要病害之一。深入系统地分析了岩石受冻融循环影响的冻融破坏过程、影响因素,研究了其冻融破坏机理;通过试验研究了2种岩石的冻融破坏过程,发现了岩石的2种基本冻融破坏模式:片落模式和裂纹模式;并通过在室温下(20℃)对2种饱和岩石经历不同冻融循环次数后的单轴压缩试验,得到岩石的单轴压缩强度、弹性模量分别与冻融循环次数的拟合关系表达式,为今后岩石冻融损伤及冻融断裂研究提供了可靠的试验依据。The rock failure due to freeze-thaw weathering is a main engineering problem which often occurs in the rock engineering in cold regions. The process of the rock failure due to freezing and thawing and the effect factors are systematically analyzed, also the mechanism of rock failure due to freezing and thawing is studied. The process of freezing and thawing failure of two types of rocks is studied by experiments; and two basic modes of rock deterioration are found： i.e., the scaling mode and fracturing mode. In addition to providing reliable experimental foundation for studying the damage and fracture due to freezing and thawing, the uniaxial compression tests of two types of rocks subjected to different cycles of freezing and thawing were conducted in room temperature（about 20 ℃）： and the fitting relations of the uniaxial compressive strength and elastic modulus respectively with the cycles of freezing and thawing are formulated.

关 键 词：岩石力学 冻岩力学 冻融循环 单轴压缩 冻融损伤 

分 类 号：TU452[建筑科学—岩土工程]