摘要
ＣＴ为岩土材料非破坏的持续检测和内部结构的定量描述提供了可能，利用这一手段观测分析了冻土单轴蠕变过程中结构的变化情况，结果表明蠕变过程中结构缺陷的增生与扩展制约着土的结构的强化与弱化作用，控制着蠕变过程形态特征。易破坏区首先发生于样品的低密段，在软弱段的某一薄弱层面形成一环状低密带，然后向外扩展。
CT provides a possibility for both non destructive and continuous measurement of materials (rocks and soil etc ) and quantitative description of internal structures In this paper, CT is used to monitor and analyze the change of structures in frozen soil in uniaxial creep process It is found that the strengthening and softening actions of structures in frozen soil are controlled by the initiation and growth of structural defefcts, which govern the characteristics of creep process The breaking appears firstly in the weakened area with low density with in the sample A ring like zone with low density is found in a weakened layer within the sample and then extends outwards to result in integral failure of the structure at last
出处
《冰川冻土》
CSCD
北大核心
1996年第4期306-311,共6页
Journal of Glaciology and Geocryology
