摘要
岩石冻融损伤机理的研究对寒区公路、铁路等工程建设具有重要意义。通过文献调研发现,岩石冻融损伤机理研究主要包括岩石冻融损伤的影响因素、冻融损伤的劣化模式、冻融岩石的细观结构和力学性质这4方面的内容。对以上4方面的国内外研究现状进行综述,总结归纳出岩石的冻融损伤机理,并提出了当前研究的难点与不足。最后依据岩石冻融损伤机理研究的难点与不足,提出未来的研究工作可以从以下几方面开展:开展冻融循环周期对岩石损伤影响的试验研究;探究裂隙或节理的初始饱和度对岩石冻融损伤的影响规律;建立冻融作用下岩石未冻水含量的计算模型及岩石的多相多场耦合模型;进行多因素综合作用和不同应力环境下冻融岩石力学性质的试验研究,重点研究岩石动力学特性的变化规律及动态本构模型的建立。
The study of the freeze-thaw damage mechanism of rocks is crucial for engineering construction in cold regions. Through a literature investigation, it is found that the research on this topic mainly focuses on four aspects: influencing factors of freeze-thaw damage, deterioration modes caused by freeze-thaw damage, meso-structure of freeze-thaw rocks, and mechanical properties of freeze-thaw rocks. By summarizing the research status of these aspects both domestically and internationally, the freeze-thaw damage mechanism of rocks is deduced, and the difficulties and shortcomings of current research are identified. Finally, based on the identified difficulties and shortcomings, it is proposed that the future research work can be carried out from the following aspects: Carry out experimental research on the influence of freeze-thaw cycle on rocks damage;Explore the influence of initial saturation of cracks or joints on freezing and thawing damage of rocks;Establish the calculation model of unfrozen water content of rock under freeze-thaw action and the multiphase and multi-field coupling model of rock;Study experimentally the mechanical properties of frozen-thawed rocks under multi-factor comprehensive action and different stress environments, with emphasis on the change law of rock dynamic characteristics and the establishment of dynamic constitutive model.
作者
杨志全
甘进
樊详珑
朱颖彦
杨溢
丁渝池
YANG Zhiquan;GAN Jin;FAN Xianglong;ZHU Yingyan;YANG Yi;DING Yuchi(Faculty of Public Safety and Emergency Management,Kunming University of Science and Technology,Kunming 650093,China;Key Laboratory of Geological Disaster Risk Prevention and Control and Emergency Disaster Reduction of Ministry of Emergency Management of the People's Republic of China,Kunming 650093,China;Key Laboratory of Early Rapid Identification and Prevention and Control of Geological Diseases in Traffic Corridor of High Intensity Earthquake Mountainous Area of Yunnan Province,Kunming 650093,China;Institute of Mountain Hazards and Environment,Chinese Academy of Sciences,Chengdu 610041,China)
出处
《防灾减灾工程学报》
CSCD
北大核心
2023年第1期176-188,共13页
Journal of Disaster Prevention and Mitigation Engineering
基金
国家自然科学基金项目(41861134008)
云南省阿瑟夫·汉院士工作站(202105AF150076)
云南省重点研发计划(202003AC10002)
云南省基础研究计划面上项目(202001AT070043)资助。
关键词
岩石
冻融循环
损伤机理
研究进展
rock
Freeze-thaw cycle
Damage mechanism
research progress