断续节理岩体波传播试验装置的研制及其标定  

Development and Calibration of Wave Propagation Test Device for Non-Persistent Jointed Rock Mass

作　　者：朱建波 黄超民 翟天琦 任梦 周韬 Zhu Jianbo;Huang Chaomin;Zhai Tianqi;Ren Meng;Zhou Tao(State Key Laboratory of Hydraulic Engineering Simulation and Safety,Tianjin University,Tianjin 300350,China;Guangdong Provincial Key Laboratory of Deep Earth Sciences and Geothermal Energy Exploitation and Utilization,Shenzhen 518060,China;School of Civil and Traffic Engineering,Shenzhen University,Shenzhen 518060,China;CCCC Second Harbor Engineering Company Ltd.,Wuhan 430000,China)

机构地区：[1]天津大学水利工程仿真与安全国家重点实验室,天津300350 [2]广东省深部地球科学与地热资源开发利用重点实验室,深圳518060 [3]深圳大学土木与交通工程学院,深圳518060 [4]中交第二航务工程局有限公司,武汉430000

出　　处：《天津大学学报（自然科学与工程技术版）》2022年第6期553-561,共9页Journal of Tianjin University：Science and Technology

基　　金：国家重点研发计划资助项目(2018YFC0407002);国家自然科学基金资助项目(51974197).

摘　　要：为了解决现有试验设备难以激发并开展复杂节理岩体应力波传播规律研究的技术难题,基于摆锤撞击原理设计并研制了一种可用于实现断续节理应力波激发、传播和测试的试验装置.该装置主要由平面波发生器、支撑平台、软件控制系统和数据采集系统4部分构成.该试验装置具有可控、可调、可重复激发具有不同波长和幅值的应力波的优点.利用有限元数值软件模拟了平面应力波在岩石板上的传播,结果表明应力波波阵面沿板轴线对称分布,而波阵面幅值一致性范围随着传播距离逐渐下降.利用该试验装置分别在完整岩石板和断续节理岩石板上开展了试验研究,结果表明应力波在完整岩石板中同一横截面处的波形基本一致,且受边界效应影响,同一截面处应力波幅值由中心向两边逐渐增大.在断续节理岩体应力波传播试验中,应力波在通过节理后不再以平面波的形式传播,断续节理后方同一截面上应力波幅值表现出节理段后被削弱、岩桥段后被增强的特点.进一步的分析表明由断续节理引起的幅值差大于同范围内由边界效应引起的幅值差,从而验证了本试验装置可开展断续节理岩体波传播规律的研究,并为含复杂结构面岩体中应力波传播规律的研究提供了技术手段.The existing experimental equipment is difficult to excite and conduct research on the stress wave propagation law of complex joint rock mass.To solve this problem,this paper designed and developed an experimental device that can be used to excite,propagate,and test the stress wave of a non-persistent joint based on the pendulum impact principle.The system mainly comprises four parts:a plane wave generator,supporting platform,control system,and data collection system.It has the advantages of controllable,adjustable,and repeatable generation of plane waves with different wavelengths and amplitudes.The propagation of plane stress wave on rock plate was simulated by finite element numerical software.The results showed that the stress wave front was symmetrically distributed along the plate axis,and the amplitude consistency range of the wave front decreased with the propagation distance.The test device was used to carry out experimental research on intact rock plate and non-persistent joint rock plate respectively.Results showed that the waveform of stress wave at the same cross section of the intact rock plate was basically the same,and affected by the boundary effect,the amplitude of stress wave at the same section gradually increased from the center to the sides.In the stress wave propagation test of non-persistent jointed rock mass,the stress wave no longer propagated in the form of plane wave after passing through the joint.The amplitude of stress wave on the same section behind the non-persistent joint showed the characteristics of weakening after the joint sec-tion and strengthening after the rock bridge section.Further analysis showed that the amplitude difference caused by the non-persistent joint was greater than that caused by the boundary effect in the same range.Calibration test results show that the test device can be used to study the wave propagation law of a non-persistent jointed rock mass and can provide a technical means for the study of the stress wave propagation law of the rock mass with a com

关 键 词：应力波 试验装置 波传播 断续节理 

分 类 号：O347.4[理学—固体力学]