干湿循环作用下膨胀岩崩解的粒度熵特征  

Characteristics of grading entropy of disintegration of swelling rock under dry-wet cycles

作　　者：张宗堂 高文华[2] 唐骁宇[2] 张巨峰 韩森 ZHANG Zongtang;GAO Wenhua;TANG Xiaoyu;ZHANG Jufeng;HAN Sen(School of Resource&Environment and Safety Engineering,Hunan University of Science and Technology,Xiangtan 411201,China;Hunan Provincial Key Laboratory of Geotechnical Engineering for Stability Control and Health Monitoring,Hunan University of Science and Technology,Xiangtan 411201,China)

机构地区：[1]湖南科技大学资源环境与安全工程学院,湖南湘潭411201 [2]湖南科技大学岩土工程稳定控制与健康监测湖南省重点实验室,湖南湘潭411201

出　　处：《水资源与水工程学报》2019年第6期218-224,共7页Journal of Water Resources and Water Engineering

基　　金：湖南省教育厅重点科研项目(16A073);湖南省研究生科研创新项目(CX20190790);湖南科技大学岩土工程稳定控制与健康监测省重点实验室开放基金项目(E21807);甘肃省安全生产科研项目(GAJ00011)

摘　　要：膨胀岩遇水崩解是引发工程灾害的重要原因,其在干湿循环作用下的崩解情况将更加明显。采用湖南株洲的膨胀岩样进行室内崩解试验,并基于粒度熵概念,对其在不同干燥温度、外界扰动、不同初始单块质量情况下的标准基础熵进行研究。结果表明:静态崩解方式下,相对于105、30℃而言,60℃干燥温度下的标准基础熵最小;而扰动崩解方式下,膨胀岩崩解的标准基础熵几乎不受干燥温度的影响。在干燥温度、初始单块质量等因素不变的情况下,外界扰动对膨胀岩崩解的标准基础熵存在显著影响。初始单块质量对膨胀岩崩解的标准基础熵存在一定的影响,初始单块质量越大,标准基础熵越小。试验研究表明,标准基础熵是评价岩石崩解性的一种重要指标。The disintegration of swelling rock when contacting with water is an important cause of engineering disasters,which is more obvious under the dry-wet cycles.The indoor disintegration tests were conducted on the swelling rock collected from Zhuzhou City,Hunan Province.Based on the concept of grading entropy,the relative base entropy of different dry temperatures,external disturbances and different initial mass of each block were studied.The results showed that,in the mode of static disintegration,the standard base entropy is the minimum at the dry temperature of 60℃relative to that of 105℃and 30℃.However,in the mode of disturbed disintegration,the standard base entropy of disintegration of swelling rock is almost unaffected by the drying temperature.Furthermore,in the case of constant temperature and initial mass of each block,the external disturbance has a significant effect on the standard base entropy of disintegration of swelling rock.The initial mass of each block has a certain influence on the standard base entropy of disintegration of the swelling rock,showing that the larger the initial mass of each block is,the smaller the standard base entropy will be.In addition,experimental studies have shown that the standard basic entropy is an important indicator to distinguish the strength of rock disintegration.

关 键 词：岩石崩解 膨胀岩 干湿循环 粒度熵 

分 类 号：TU458[建筑科学—岩土工程]