华东交通大学学报2025，Vol.42Issue(5)：49-57,9.
采用三维土压力盒测定土体应力的砂土试验标定分析
Calibration Analysis of 3D Earth Pressure Cells in Sand for Soil Stress Measurement
摘要
Abstract
In this paper,a calibration method for the 3D earth pressure cell in sand is introduced.Using two cus-tomized calibration cylinders,the influence of the calibration cylinder size,the box size of the earth pressure cells,the capacity and the buried depth on the calibration coefficient of the 3D earth pressure cells in sand and the sand characteristics of the 3D earth pressure cell involving loading and unloading are studied.The results show that:①The size of the calibration cylinder and the depth of burial have a large impact on the calibration re-sults,whereas for the same range of 3D earth pressure cell,the size of the base and the transducer diameter-to-thickness ratio have a smaller impact on the calibration results;②The hysteresis of the large capacity 3D earth pressure cell is smaller than that of the small capacity cells,and the large capacity cells should be preferentially selected for soil stress measurement.③The unloading curve of the 3D earth pressure cell can be normalized by the maximum stress and output voltage value before unloading,and the normalized unloading curves of the 3.0 MPa cell has a small distribution bandwidth for different unloading curves,and the exponential curve can be used for analysis of soil stress measurement.关键词
土体应力测试/三维土压力盒/薄膜压力传感器/砂土标定/滞后效应Key words
soil stress measurement/3D earth pressure cell/diaphragm pressure sensors/calibration in sand/hysteresis effect分类
计算机与自动化引用本文复制引用
蔡仙发,朱怀龙,刘银芳,周建树,朱碧堂,刘俊杰..采用三维土压力盒测定土体应力的砂土试验标定分析[J].华东交通大学学报,2025,42(5):49-57,9.基金项目
国家自然科学基金项目(52020105003) （52020105003）
中国冶金地质总局科研项目(CMGBK202102) （CMGBK202102）
