采用三维土压力盒测定土体应力的砂土试验标定分析

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中图分类号：TP212 文献标志码：A

Abstract： Inthis paper，acalibration method for the3Dearth pressurecellin sand is introduced.Using two customizedcalibrationcylinders，the influenceof thecalibrationcylinder size，the box size of the earth pressure cels，the capacityand the buried depth on the calibration coefficient of the 3D earth pressure cels in sand and the sand characteristics of the 3D earth presure cellinvolving loading and unloading are studied.The results show that： ① The size of the calibration cylinder and the depth ofburial have a large impact on the calibration results，whereas for the same range of3D earth pressurecell，the size of the base and the transducer diameter-tothickness ratio have a smaller impact on the calibration results; ② The hysteresis of the large capacity 3D earth pressure cellissmaller than that of te small capacity cells，and te large capacity cells should be preferentially selected for soil stress measurement. ③ The 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 3.0MPa cell has a small distribution bandwidth for different unloading curves，and the exponential curve can beused for analysisof soil stressmeasurement.

Key words： soil stress measurement; 3D earth pressure cell diaphragm pressure sensors; calibration in sand; hysteresis effect

Citationformat：CAIXF，ZHUHL，LIUYF，et al.Calibration analysis of3Dearth presure cells in sand for soil stress measurement[J]. Journal of East China Jiaotong University，2025，42（5）： 49-57.

土体应力测试是岩土工程中的难点，特别是加卸载条件下的土体应力测试。（剩余11266字）