岩石空心圆柱扭剪仪试验能力  

Study of hollow cylinder torsional apparatus for rock

作　　者：周辉[1,2] 姜玥 卢景景[1,2] 胡大伟 张传庆[1,2] 陈珺 李震[3,4] ZHOU Hui;JIANG Yue;ZHANG Chuan-qing;LU Jing-jing;HU Da-wei;CHEN Jun;LI Zhen(State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China;University of Chinese Academy of Sciences, Beijing 100049, China;School of Civil Engineering, Henan Polytechnic University, Jiaozuo, Henan 454000, China;Open Laboratory for Deep Mine Construction, Henan Polytechnic University, Jiaozuo, Henan 454000, China)

机构地区：[1]中国科学院武汉岩土力学研究所岩土力学与工程国家重点试验室,湖北武汉430071 [2]中国科学院大学,北京100049 [3]河南理工大学土木工程学院,河南焦作454000 [4]河南理工大学深部矿井建设重点学科开放实验室,河南焦作454000

出　　处：《岩土力学》2018年第5期1917-1922,共6页Rock and Soil Mechanics

基　　金：国家重点基础研究发展计划项目(973计划)(No.2014CB046902);中国科学院科研装备研制项目(No.YZ201553);国家自然科学基金项目(No.51427803;No.51404240;No.51709257);河南省教育厅高等学校重点科研项目(No.16A560004)~~

摘　　要：针对自行研制的岩石空心圆柱扭剪仪可独立控制4个加载参数(轴力、扭力、内围压和外围压)的功能,通过数学和力学分析,系统地整理出几种易于实现且符合实际工程的应力路径及加载方式:在轴力与内围压满足一定关系的前提下,可以获取岩石的抗拉强度,提供一种新型测量岩石抗拉强度的方法;通过控制内外围压及轴力,可以进行常规三轴试验与真三轴试验,克服了现阶段岩石真三轴试验中试验装置复杂、试样加载面摩擦大的缺点;在轴力与内、外围压分别满足一定关系时,可以分别实现平均应力p不变与中主应力系数b不变的应力路径,用于研究应力主轴旋转对岩石力学性质的影响。上述应力路径的实现对岩石力学性质的研究以及现阶段岩石室内试验的发展具有重要意义。A self-made hollow cylinder torsional apparatus for rock was developed to control four loading parameters independently, including axial force, torque, internal and external confining pressures. This study presented several stress paths and loading methods which were easy to implement in practical engineering projects and meet their requirements through mathematics and mechanics analysis. The tensile strength of rock can be obtained in the premise that the axial force and internal confining pressure satisfy specific relationships. By controlling the internal and external confining pressures and axial force, conventional triaxial tests and true triaxial tests can be carried out by using the hollow cylinder torsional apparatus for rock. Thus, the existing disadvantages of the complicated trne-triaxial test apparatus and the large loaded surface friction were overcome. The mean stress p and the coefficient of intermediate principal stress b can be kept constant when the axial force and the internal and external confining pressures meet certain relationships, respectively. Those stress paths can be used to study the effect of the stress rotation on rock mechanical properties. Therefore, the realisation of the above stress paths is of great significance to the study of rock mechanical properties and the development of laboratory tests.

关 键 词：岩石力学 应力主轴旋转 空心圆柱扭剪仪 应力路径 

分 类 号：TU452[建筑科学—岩土工程]