薄膜式土压力分布传感器研发及试验研究
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摘要
在岩土力学与工程领域,随着对土压力荷载大小与分布研究的深入,新型土压力传感器的研发愈显重要。本文利用导电敏感复合材料研制了一种新型薄膜式土压力分布传感器,其总厚度小于0.2 mm。首先介绍了传感器的设计原理及结构,初步测试结果表明,双层结构传感器的灵敏度相对更高。然后,通过大型模型试验实测检验了研发的双层结构土压力分布传感器的基本性能。新型传感器具有测点面积小(可实现大密度测试)、T/D小(对土体扰动小)、引线方便以及弯曲挠度大(适合弯曲表面压力测试)等特点。综合来看,它用于土压力分布测试初步是可行的,具有进一步深入研究的价值。
With the advances in the Geotechnical mechanics and Engineering,the research and development on new earth pressure sensors are becoming more and more important. The current study developed a thin-film soil pressure distribution test sensor-overall thickness was less than 0. 2 mm,by composite materials. The study introduced the structure and mechanism of the sensor and conducted a pretest on its sensitivity. It was shown that double-layer structure sensor had higher sensitivity. Moreover,the basic performances of the sensor were tested through largescale model experiment,which demonstrated that the sensor was reliable. The thin-film sensors can be applied into soil pressure cell as its advantages include the smaller size( large density test),the smaller T/D( less disturbance to soil),convenient wire layout and large deflection bending( suitable for curved surface) and the like.
With the advances in the Geotechnical mechanics and Engineering,the research and development on new earth pressure sensors are becoming more and more important. The current study developed a thin-film soil pressure distribution test sensor-overall thickness was less than 0. 2 mm,by composite materials. The study introduced the structure and mechanism of the sensor and conducted a pretest on its sensitivity. It was shown that double-layer structure sensor had higher sensitivity. Moreover,the basic performances of the sensor were tested through largescale model experiment,which demonstrated that the sensor was reliable. The thin-film sensors can be applied into soil pressure cell as its advantages include the smaller size( large density test),the smaller T/D( less disturbance to soil),convenient wire layout and large deflection bending( suitable for curved surface) and the like.
引文
[1]陆培毅,严驰,顾晓鲁.砂土基于室内模型试验土压力分布形式的研究[J].土木工程学报,2003,36(10):84-88.
[2]陆培毅,严驰,刘润.粘性土基于室内模型试验土压力分布形式的研究[J].建筑结构学报,2002,23(2):83-86.
[3]何颐华,杨斌,金宝森,等.深基坑护坡桩土压力的工程测试及研究[J].土木工程学报,1997,30(1):16-24.
[4]刘磊,宋二祥.土钉支护结构侧压力分布规律分析[J].工业建筑,2001,41(12):92-98.
[5]Liu Yuanyuan.Arching in Granular Materials[D].Hong Kong:University of Hong Kong,2001.
[6]Weiler W A,Kulhaway F H.Factors Affecting Stress Cell Measurement in Soil[J].Journal of the Geotechnical Engineering Division,ASCE,1982:108(12):1529-1548.
[7]Egan D,Merrifield C K.The Use of Miniature Earth Pressure Cells in a Multi-Gravity Environment[C]//Centrifuge 98.Kimura:[s.n].1998:55-59.
[8]Weiler W A,Kulhaway F H.Factors Affecting Stress Cell Measurement in Soil[J].Journal of the Geotechnical Engineering Division,ASCE,1982:108(12):1529-1548.
[9]徐光明,陈爱忠,曾友金,等.超重力场中界面土压力的测量[J].岩土力学,2007,28(12):2671-2674.
[10]廖波,周国庆,王英杰.炭黑/硅橡胶导电复合薄膜传感特性研究[J].传感技术学报,2013,26(8):1101-1104.
[11]廖波.炭黑/硅橡胶导电敏感复合材料可重复性试验研究[J].传感技术学报,2014,27(9):1164-1168.
[12]周檀君,周国庆,王建州,等.煤矿长斜井井筒外荷载特征研究[J].煤炭工程,2016,48(3):77-80.
[2]陆培毅,严驰,刘润.粘性土基于室内模型试验土压力分布形式的研究[J].建筑结构学报,2002,23(2):83-86.
[3]何颐华,杨斌,金宝森,等.深基坑护坡桩土压力的工程测试及研究[J].土木工程学报,1997,30(1):16-24.
[4]刘磊,宋二祥.土钉支护结构侧压力分布规律分析[J].工业建筑,2001,41(12):92-98.
[5]Liu Yuanyuan.Arching in Granular Materials[D].Hong Kong:University of Hong Kong,2001.
[6]Weiler W A,Kulhaway F H.Factors Affecting Stress Cell Measurement in Soil[J].Journal of the Geotechnical Engineering Division,ASCE,1982:108(12):1529-1548.
[7]Egan D,Merrifield C K.The Use of Miniature Earth Pressure Cells in a Multi-Gravity Environment[C]//Centrifuge 98.Kimura:[s.n].1998:55-59.
[8]Weiler W A,Kulhaway F H.Factors Affecting Stress Cell Measurement in Soil[J].Journal of the Geotechnical Engineering Division,ASCE,1982:108(12):1529-1548.
[9]徐光明,陈爱忠,曾友金,等.超重力场中界面土压力的测量[J].岩土力学,2007,28(12):2671-2674.
[10]廖波,周国庆,王英杰.炭黑/硅橡胶导电复合薄膜传感特性研究[J].传感技术学报,2013,26(8):1101-1104.
[11]廖波.炭黑/硅橡胶导电敏感复合材料可重复性试验研究[J].传感技术学报,2014,27(9):1164-1168.
[12]周檀君,周国庆,王建州,等.煤矿长斜井井筒外荷载特征研究[J].煤炭工程,2016,48(3):77-80.