摘要
工程岩体冻融损伤问题是寒区常见的工程难题,其主要诱因是岩体中水分的冻胀融缩作用。目前国内外学者关于冻岩问题的主要研究内容可大体归纳为冻岩物理力学性质、相变过程、低温多场(THM)耦合、冻融损伤模型及数值分析等4个大方面。几十年来,国内外学者通过理论分析、数值模拟、现场及室内试验等多种途径对冻岩问题展开研究,取得了丰硕的成果,但目前对冻岩问题的研究远未成熟,很多研究尚停留在试验探索阶段。要真正意义上揭示冻岩损伤机制,应以水冰相变为切入点,立足细观尺度,充分考虑冻胀融缩作用与裂隙扩展的相互影响,进而拓展至冻融作用对岩体裂隙网络发展的影响。
The main inducement to freezethaw damage of engineering rock mass is the frost heave and thawing shrinkage of moisture in rock, which is quite common in cold regions. The research on freezing rock can be mainly concluded to four parts, which are the physicomechanical properties of freezing rock, phase transition process, the thermohydromechanical （THM） coupling at low temperature, the model of freezethaw damage and numerical simulation. During the last several decades, researchers have put efforts on freezing rock by theory analysis, numerical simulation, field test and laboratory experiments. Although remarkable achievements have been obtained, there is still long way to go in the field of freezing rock and plenty of researches have stayed in the stage of experiment. Research on frost damage of rock should base on microscale and take the waterice phase transition as entry point. Furthermore the relationship between freezethaw action and crack propagation should be investigated, and extend to the influence of freezethaw action on the whole fracture network of rock mass.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2012年第4期971-978,共8页
Rock and Soil Mechanics
基金
国家自然科学基金资助项目(No.41072239)
关键词
裂隙岩体
冻融损伤
低温THM耦合
水热迁移
相变
fractured rock mass
freezethaw damage
thermohydromechanical coupling at low temperature
hydraulic and heattransport
phase transition
