水化-冻融耦合作用下大理岩单轴蠕变力学特性  

Uniaxial Creep Mechanical Properties of Marble Under Hydration Freeze-Thaw Coupling

作　　者：赵越 李磊[1] 闫晗 肖万山 苏艳军 Zhao Yue;Li Lei;Yan Han;Xiao Wanshan;Su Yanjun(Mining Institute,Liaoning Technical University,Fuxin 123000,Liaoning,China;Institute of Innovation and Development for Fuxin Transition,Liaoning Technical University,Fuxin 123000,Liaoning,China;Liaoning Province Resource-Based City Sustainable Development Research Base,Fuxin 123000,Liaoning,China;Liaoning Team of Geological Survey Center of China Building Materials Industry,Shenyang 110004,China;China Architecture Northeast Design and Research Institute Co.Ltd.,Shenyang 110166,China)

机构地区：[1]辽宁工程技术大学矿业学院,辽宁阜新123000 [2]辽宁工程技术大学阜新转型创新发展研究院,辽宁阜新123000 [3]辽宁省资源型城市可持续发展研究基地,辽宁阜新123000 [4]中国建筑材料工业地质勘查中心辽宁总队,沈阳110004 [5]中国建筑东北设计研究院有限公司,沈阳110166

出　　处：《吉林大学学报（地球科学版）》2023年第4期1195-1203,共9页Journal of Jilin University：Earth Science Edition

基　　金：国家自然科学基金项目(51774165);辽宁省教育厅青年科技人才“育苗”项目(LJ2020QNL003);辽宁工程技术大学学科创新团队项目(LNTU20TD-05)。

摘　　要：为探究岩石在水化-冻融耦合作用下的蠕变规律,以湖北地区某露天边坡大理岩为研究对象,设置酸性、中性、碱性3种溶液环境浸泡,开展不同冻融循环次数条件下的单轴压缩蠕变试验,并对比分析大理岩宏观破坏形态和断口细观特征。结果表明:1)在同一冻融循环次数条件下,酸性溶液环境中的瞬时、蠕变应变量及蠕变速率均最大,碱性溶液环境次之,中性溶液环境最小;2)大理岩长期强度为瞬时强度的0.685~0.812,长期强度折减较大;3)酸性溶液对大理岩颗粒结构的损伤劣化程度强于碱性溶液,但随着冻融作用的增强,碱性溶液对岩石结构的损伤程度逐渐接近酸性溶液。In order to explore the creep law of rock under the coupling action of hydration,freezing and thawing,taking the marble of an open-pit slope in Hubei as the research object,the uniaxial compression creep tests under different freeze-thaw cycles were carried out by soaking in acid,medium and alkali solutions,and the macro failure morphology and fracture micro characteristics of marble were compared and analyzed.The results showed that:1)Under the same number of freeze-thaw cycles,the instantaneous,creep strain and creep rate in acidic environment were the largest,alkaline was the second,and neutral was the smallest.2)The average long-term strength of marble was 0.685-0.812 of the instantaneous strength,and the long-term strength was greatly reduced.3)The damage degree of acid solution to marble particle structure was stronger than that of alkaline solution,but with the enhancement of freeze-thaw effect,the damage degree of alkaline solution to rock structure was gradually close to that of acid solution.

关 键 词：水化学 冻融循环 大理岩 蠕变 损伤 断口 

分 类 号：TU452[建筑科学—岩土工程]