岩土力学 ›› 2020, Vol. 41 ›› Issue (1): 336-341.doi: 10.16285/j.rsm.2019.0417

• 测试技术 • 上一篇    下一篇

流变应力恢复法压力传感器传感 单元方位布设研究

刘泉声1, 2，罗慈友1, 3，朱元广1，蒋景东4，刘鹤1, 3，彭星新5，潘玉丛2   

  1. 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实验室，湖北 武汉430071；2. 武汉大学 岩土与结构工程安全湖北重点实验室， 湖北 武汉430072；3. 中国科学院大学，北京100049；4. 南京水利科学研究院，江苏 南京 210024； 5. 中铁十一局集团第四工程有限公司，湖北 武汉 430073
  • 收稿日期:2019-02-24 修回日期:2019-05-29 出版日期:2020-01-13 发布日期:2020-01-05
  • 通讯作者: liuqs@whrsm.ac.cn E-mail:liuqs@whrsm.ac.cn
  • 作者简介:刘泉声，男，1962年生，博士，教授，博士生导师，主要从事岩石工程方面的教学与研究工作。
  • 基金资助:
    国家重点基础研究发展计划（No. 2015CB058102）；国家自然科学基金资助项目（No. 51874275，No. 41807250）。

Research on orientation layout of pressure sensing units by rheological stress recovery method

LIU Quan-sheng1, 2, LUO Ci-you1, 3, ZHU Yuan-guang1, JIANG Jing-dong4, LIU He1, 3, PENG Xing-xin5, PAN Yu-cong2   

  1. 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China; 2. Key Laboratory of Geotechnical and Structural Safety Engineering of Hubei Province, Wuhan University, Wuhan, Hubei 430072, China; 3. University of Chinese Academy of Sciences, Beijing 100049, China; 4. Nanjing Hydraulic Research Institute, Nanjing, Jiangsu 210024, China; 5. China Railway 11th Bureau Group 4th Engineering Co., Ltd., Wuhan, Hubei 430073, China
  • Received:2019-02-24 Revised:2019-05-29 Online:2020-01-13 Published:2020-01-05
  • Supported by:
    This work was supported by the National Program on Key Basic Research Project of China (2015CB058102) and the National Natural Science Foundation of China (51874275, 41807250)

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摘要： 实时测量深部三维地应力场分布及扰动规律对工程岩体稳定性分析至关重要，但目前仍缺乏成熟的针对深部软弱围岩的地应力测试技术及配套仪器。首先详细介绍了深部软岩地应力测试方法流变应力恢复法的原理与技术，随后针对岩体压力传感器传感单元的方位合理布设问题展开了深入的理论分析。研究结果表明：如果六向压力传感器上半球的3个传感面法向布设为两两相互垂直，则下半球的3个传感面法向不能布设为两两相互垂直；如果上半球的3个传感面法向布设为两两相互垂直，则下半球的3个传感面法向不能与上半球的3个传感面法向平行，且下半球的3个传感面中不能有两个法向同时垂直于上半球任一传感面法向，下半球3个传感面法向与x、y和z轴的方向余弦值最好相差不大，且不能接近于两两相互垂直；如果上半球的3个传感面法向不两两相互垂直，从设计角度考虑列举了一种情形：上半球的3个传感面法向布设为与水平面夹角为45°，下半球的3个传感面法向与水平面夹角30°，上下半球的传感面法向在Oxy水平面上投影的夹角为60°，计算结果显示，此种布置方式是其中一种科学合理的布置方式。

关键词: 流变应力恢复法, 压力传感器, 传感单元, 方位布设

Abstract: Real-time measurement of deep three-dimensional geostress field distribution and disturbance law are very important for the engineering analysis of rock mass stability. However, there lacks the mature testing technology and supporting instruments for measuring the ground stress in weak surrounding rock at depth. The article firstly introduces in details the fundamental principles and technology of the rheological stress recovery method of the ground stress test for deep soft rock. Then in-depth theoretical analysis is carried out to study the rationality of sensing units’ layout of the rock mass pressure sensor. The results show that if the three sensing surfaces of the upper hemisphere of the six-direction pressure sensor are set to be perpendicular to each other’s normal direction, the three sensing surfaces of the lower hemisphere cannot be arranged perpendicular to each other’s normal direction; if the three sensing surfaces of the upper hemisphere are set to be perpendicular to each other’s normal direction, the three sensing surfaces’ normal direction of the lower hemisphere cannot be parallel to the three sensing surfaces’ of the upper hemisphere, and two of the three sensing surfaces of the lower hemisphere cannot have their normal directions perpendicular to any of the sensing surfaces’ normal direction of the upper hemisphere, three sensing surfaces of the lower hemisphere cannot be close to perpendicular to each other, and the cosine of the normal direction and the x, y, z axes are preferably not much different. If the three sensing surfaces of the upper hemisphere are not perpendicular to each other, a layout design is considered with the three sensing surfaces of the upper hemisphere having their normal directions set at an angle of 45° to the horizontal plane and those of lower hemisphere set at an angle of 30° to the horizontal plane, and the angle of the sensing surfaces’ the normal directions of the upper and lower hemispheres projected on the Oxy horizontal plane to be 60°. The calculation results show that this arrangement is one of the arrangements that are scientifically sound.

Key words: rheological stress recovery method, pressure sensor, sensing units, orientation layout

中图分类号: 

  • O 319.56
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