Calibration method and effect factors of miniature pore water pressure transducer for geotechnical centrifuge modelling

TANG Zhao-guang; WANG Yong-zhi; SUN Rui; WANG Ti-qiang; DUAN Xue-feng; WANG Hao-ran

doi:10.11779/CJGE202007007

Volume 42 Issue 7

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Chinese Journal of Geotechnical Engineering > 2020 > 42(7): 1238-1246. > DOI: 10.11779/CJGE202007007

TANG Zhao-guang, WANG Yong-zhi, SUN Rui, WANG Ti-qiang, DUAN Xue-feng, WANG Hao-ran. Calibration method and effect factors of miniature pore water pressure transducer for geotechnical centrifuge modelling[J]. Chinese Journal of Geotechnical Engineering, 2020, 42(7): 1238-1246. DOI: 10.11779/CJGE202007007

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Calibration method and effect factors of miniature pore water pressure transducer for geotechnical centrifuge modelling

Key Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China

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Received Date: October 15, 2019
Available Online: December 05, 2022

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Abstract

Abstract

Accurate measurement of pore water pressure is one of key technologies in geotechnical centrifugal modelling. Aiming at noticeable scatter of dynamic pore pressure measuring results in the recently repeated dynamic centrifugal liquefaction tests at home and abroad, a novel device for calibrating the response of dynamic pore water pressure transducer is proposed. Moreover, three types of internationally widespread pore water pressure transducers are selected to perform a series of comparison tests over their dynamic performance evaluation and effect factors. The main conclusions are drawn: (1) The proposed calibration device has advantages of long-term high-pressure sealing, uniform load transferring and random loading generation, which can meet reliable calibration requirements of pore water pressure dynamics for dynamic centrifugal tests. (2) Due to the compressibility of air inside the inner chamber and porous stone of transducers, air is not suitable for direct usage as a pressure medium for dynamic calibration. (3) With full saturation of the porous stone, the maximum response frequencies of the three types of sensors are all about 200 Hz, basically meeting the requirements of dynamic centrifugal liquefaction tests. (4) Using the vacuum-stirring saturation method from China's code, the three types of transducers present phenomena of different amplitude attenuations and phase delays, which indicates that different transducers, saturation methods and calibration devices are likely the reasons for noticeable scatter of pore pressure time series and liquefaction thresholds in the repeated centrifuge tests. (5) With three saturating methods of vacuum-stirring, continuous-vacuum and atmospheric pressure, the periods requiring full saturation of the three-type transducers for reliable measurement are 9 h, 16 h and 4 d, respectively. The proposed calibration device, method and conclusions are of paramount importance to advance and standardize the measurement technology of pore water pressure for dynamic centrifugal modelling.
- geotechnical centrifuge modelling,
- pore water pressure,
- miniature transducer,
- dynamic response,
- effect factor

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[1]	黄文熙. 土的弹塑性应力–应变模型理论[J]. 岩土力学, 1979, 1(1): 1-20. https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX197901001.htm HUANG Wen-xi. Theory of elastoplastic stress strain model for soil[J]. Rock and Soil Mechanics, 1979, 1(1): 1-20. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX197901001.htm
[2]	FREDLUND D G, RAHARDJO H. Soil Mechanics for Unsaturated Soils[M]. New York: Wiley Inc, 1993.
[3]	KUTTER B L, SATHIALINGAM N, HERRMANN L. Effects of arching on response time of miniature pore pressure transducer in clay[J]. Geotechnical Testing Journal, 1990, 13(3): 164-178. doi: 10.1520/GTJ10155J
[4]	KUTTER B L. Effects of capillary number, bond number, and gas solubility on water saturation of sand specimens[J]. Canadian Geotechnical Journal, 2013, 50(2): 133-144. doi: 10.1139/cgj-2011-0250
[5]	LEE F H. Frequency response of diaphragm pore pressure transducers in dynamic centrifuge model tests[J]. Geotechnical Testing Journal, 1990, 13(3): 201-207. doi: 10.1520/GTJ10158J
[6]	杜延龄, 韩连兵. 土工离心模型试验技术[M]. 北京: 中国水利水电出版社, 2010. DU Yan-ling, HAN Lian-bing. Geotechnical Centrifuge Model Test Technology[M]. Beijing: China Water and Power Press, 2010. (in Chinese)
[7]	孙汝建. 压阻式孔隙水压力计性能试验研究[J]. 岩土工程学报, 2002, 24(6): 79-798. https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC200206028.htm SUN Ru-jian. Experimental study of piezoresistive silicon pore pressure transducers[J]. Chinese Journal of Geotechnical Engineering, 2002, 24(6): 796-798. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTGC200206028.htm
[8]	KUTTER B L, CAREY T J, HASHIMOTO T, et al. LEAP-GWU-2015 experiment specifications, results and comparisons[J]. Soil Dynamic and Earthquake Engineering, 2018, 113(10): 616-628.
[9]	ZEGHAL M, GOSWAMI N, KUTTER B L et al. Stress-strain response of the LEAP-2015 centrifuge tests and numerical predictions[J]. Soil Dynamic and Earthquake Engineering, 2018, 113(10): 804-818.
[10]	MURALEETHARAN, K K, GRANGER K K. The use of miniature pore pressure transducers in measuring matric suction in unsaturated soils[J]. Geotechnical Testing Journal, 1999, 22(3): 226-234. doi: 10.1520/GTJ11113J
[11]	土工离心模型试验技术规程：DL/T 5102—2013[S]. 2014. Specification for Geotechnical Centrifuge Model Test Techniques: DL/T 5102—2013[S]. 2014. (in Chinese)
[12]	王钊, 邹维列, 李侠. 非饱和土吸力测量及应用[J]. 四川大学学报, 2004, 36(2): 1-6. https://www.cnki.com.cn/Article/CJFDTOTAL-SCLH200402000.htm WANG Zhao, ZOU Wei-lie, LI Xia. Measurement and application of suction in unsaturated soils[J]. Journal of Sichuan University (Engineering Science Edition), 2004, 36(2): 1-6. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-SCLH200402000.htm
[13]	李京爽, 邢义川, 侯瑜京. 离心模型中测量基质吸力的微型传感器[J]. 中国水利水电科学研究院学报, 2008, 6(2): 136-143. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGSX200802010.htm LI Jing-shuang, XING Yi-chuan, HOU Yu-jing. Miniature transducers for matric suction measurement in centrifuge models[J]. Journal of China Institute of Water Resources and Hydropower Research, 2008, 6(2): 136-143. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-ZGSX200802010.htm
[14]	STRINGER M E, ALLMOND J D, PROTO C J, et al. Evaluating the response of new pore pressure transducers for use in dynamic centrifuge tests[C]//Proceedings of the 8th International Conference on Physical Modelling in Geotechnics, 2014, Perth, Australia.
[15]	ALLMOND J D, WILSON D. Analysis and Comparison of Various Pore Pressure Transducers Implemented in the JDA02 Centrifuge Test[R]. Davis: University of California at Davis, 2012.
[16]	MADABHUSHI G. Centrifuge Modelling for Civil Engineering[M]. Boca Raton: CRC Press, 2014.
[17]	PHILLIPS R, SEKIGUCHI H. Water Wave Trains in a Drum Centrifuge[R]. Cambridge: University of Cambridge, 1991.
[18]	浙江大学. 一种孔隙水压力计标定系统: 201510957559.8[P]. 2018-2-06.
[19]	KHOSRAVI M, RAYAMAJHI D, GANCHENKO A, et al. Pore Pressure Transducer Calibration Procedure[R]. Davis: University of California at Davis, 2013.
[20]	王永志, 袁晓铭, 王海. 动力离心试验常规点位式量测技术改进方法[J]. 岩土力学, 2015, 36(增刊2): 722-728. https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX2015S2108.htm WANG Yong-zhi, YUAN Xiao-ming, WANG Hai. Improvement method of node-oriented measurement technique for dynamic centrifuge modeling[J]. Rock and Soil Mechanics, 2015, 36(S2): 722-728. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX2015S2108.htm
[21]	压力传感器性能试验方法：GB/T 15478—2015[S]. 2015. The Methods of the Performances for Pressure Transducer/Sensor: GB/T 15478—2015[S]. 2015. (in Chinese)
[22]	BOORE D M. Simulation of ground motion using the stochastic method[J]. Pure and Applied Geophysics, 2003, 160(3/4): 635-676.