盒式土压力传感器标定测试研究

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中文摘要：土压力传感器标定是土工测试的关键基础工作,标定装置与方法标准尚未形成共识.基于固结试验加载平台,提出了垫片型和等径型两种土压力传感器标定装置,并使用砂土针对盒式土压力传感器及轴力传感器开展了对比测试.研究表明,盒式土压力传感器的加载卸载标定系数线性度尚可,但存在一定滞回性.垫片型、等径型标定装置所得砂土标定系数分别低于、高于液压厂标系数,标定装置的内部尺寸对标定结果影响显著.轴力传感器标定测试及数值模拟结果均表明等径型标定装置内传感器上覆压强与加载量相等,符合标定装置的基本工作条件,但垫片型标定装置内竖向应力分布不均匀,导致内部传感器上方的压强低于加载量.上述研究为深化对土压力传感器标定的认识提供了有益参考.

外文标题：Calibration Testing Research of Box-type Soil Pressure Sensors

外文摘要：Calibration of soil pressure sensors is a fundamental task in geotechnical testing,but a consensus on standard calibration devices and methods has yet to be reached.Based on load-ing platform for consolidation test,two types of calibration devices for soil pressure sensors,namely shim type and equal diameter type,are proposed.Comparative tests are conducted using sandy soil for box-type soil pressure sensors and axial force sensors.The research indi-cates that the linearity of the loading-unloading calibration coefficient of box-type soil pressure sensors is acceptable,but there is a certain hysteresis existing.The calibration coefficients ob-tained from shim type and equal diameter type calibration devices are respectively lower and higher than those from hydraulic factory calibration,indicating a significant influence of the in-ternal dimensions of the calibration device on the calibration results.Both calibration tests and numerical simulation results for axial force sensors show that the overburden pressure on the sensor in the equal diameter type calibration device is equal to the applied load,which meets the basic working conditions of the calibration device.However,the shim type calibration de-vice exhibits uneven vertical stress distribution internally,resulting in lower pressure above the sensor than the applied load.This research provides valuable reference for a deeper understand-ing of soil pressure sensor calibration.

外文关键词：

soil pressure sensorcalibration deviceshim typeequal diameter typevertical stress distribution

作者：

姜彦彬、周汤啸、瞿浩、张震东、韩劭恒

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作者单位：

金陵科技学院建筑工程学院,江苏南京 211169

水利部水库大坝安全重点实验室,江苏南京 210024

河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京 210098

关键词：

土压力传感器标定装置垫片型等径型竖向应力分布

基金：

国家自然科学基金青年基金江苏省高等学校基础科学(自然科学)研究面上项目水利部水库大坝安全重点实验室开放基金江苏省产学研合作项目金陵科技学院科研项目金陵科技学院科研项目金陵科技学院科教融合项目国家级大学生创新创业训练计划

项目编号：

5220834622KJB560017YK323008BY20231298jitb-202130jitfhxm-2021062022KJRH12202313573016Z

出版年：

2024

DOI：

10.16515/j.cnki.32-1722/n.2024.01.004

金陵科技学院学报

金陵科技学院

金陵科技学院学报

影响因子：0.5

ISSN：1672-755X

年,卷(期)：2024.40(1)

参考文献量7