摘要
将页岩试样干燥后进行饱水及冻融循环试验,并对各种状态下的岩样进行力学特性试验,研究了岩石的遇水软化性、冻融劣化及变形破坏规律,分析其损伤扩展特性。结果表明:水分及冻融循环对页岩的力学效应有重要影响。岩石结构弱化,摩擦特性增强,力学性质产生劣化,但经历20次冻融循环后冻融损伤趋于稳定。
The water-saturated and freeze-thaw cycling experiment was conducted after the shale samples were dried, then the mechanical properties experiments at various states were carried out. The characteristics of water softening and the laws of freeze-thaw deterioration, deformation and failure for rock were studied systematically, even more, the dam- age propagation characteristics of shale were analyzed. The experimental result shows that the influence of moisture and freeze-thaw cycles on the mechanical effects of shale is important. The rock structures weaken, the friction characteristics enhance,and the mechanical properties of the rock deteriorate, but the freeze-thaw damage tends to be steady after the freeze-thaw cycle amounts to 20 times.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2014年第2期95-99,共5页
Journal of Wuhan University of Technology
基金
国家自然科学基金(11172232
41272340)
陕西省自然科学基金(2011JM1003)
教育部新世纪人才支持计划项目(ACET-12-1044)
陕西省教育厅专项基金(11JK0525)
关键词
水分
冻融循环
岩石
力学特性
损伤
moisture
freeze-thaw cycle
rock
mechanical characteristics
damage
