Abstract
Because of the elevated gravity and dimensional constraints, miniaturized sensors are required to measure pore pressure within soil specimens in geotechnical centrifuge testing. Electrical sensors have been used for the purpose. The small dimensions and their mechanical configurations made the available electrical pore pressure sensors fragile. They can be easily damaged in specimen preparation and testing. The electrical sensors tend to have a nonlinear and non-repeatable behavior in negative pressure range. Taking advantage of the optical fiber Bragg grating (FBG), the authors developed an FBG based miniature pore pressure sensor. The FBG sensors are immune to moisture and electromagnetic interference. The readings are linear in both positive and negative pressure range. A specially made FBG readout unit capable of taking readings at 10 kHz was used to monitor the pore pressure within the soil specimen in dynamic centrifuge tests. The paper describes and design of the miniature FBG pore pressure transducer system and its applications in static and dynamic physical model tests at the Cambridge University and National Central University geotechnical centrifugal testing facilities.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Take, W.A., Bolton, M.D.: A new device for the measurement of negative pore water pressures in centrifuge models. Presented at International Conference on Physical Modelling in Geotechnics, ICPGM 2002, St. John’s, Newfoundland, Canada, pp. 89–94 (2002)
Weng, X., Zhao, Y., Lou, Y., Zhan, J.: Application of fiber bragg grating strain sensors to a centrifuge model of a jacked pile in collapsible loess. ASTM Geotech. Test. J. 39(3), 362–370 (2016)
Kapogianni, E., Sakellariou, M., Laue, J.: Experimental investigation of reinforced soil slopes in a geotechnical centrifuge, with the use of optical fibre sensors. Geotech. Geol. Eng. 35(2), 585–605 (2016)
Zhang, D., Xu, Q., Bezuijen, A., Zheng, G., Wang, H.-X.: Internal deformation monitoring for centrifuge slope model with embedded FBG arrays. Landslides (2016). https://doi.org/10.1007/s10706-016-0127-2
Muraleetharan, K.K., Granger, K.K.: The use of miniature pore pressure transducers in measuring matric suction in unsaturated soils. ASTM Geotech. Test. J. 22(3), 226–234 (1999)
Huang, A.-B., Lee, J.-T., Ho, Y.-T., Chiu, Y.-F., Cheng, S.-Y.: Stability monitoring of rainfall-induced deep landslides through pore pressure profile measurements. Soils Found. 52(4), 737–747 (2012)
Lee, J.T., Tien, K.C., Ho, Y.T., Huang, A.B.: A fiber optic sensored triaxial testing device. ASTM Geotech. Test. J. 34(2), 103–111 (2011)
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2018 Springer Nature Switzerland AG
About this paper
Cite this paper
Huang, AB., Wu, KW., Elshafie, M.Z.E.B., Hung, WY., Ho, YT. (2018). Development of an FBG-Sensed Miniature Pressure Transducer and Its Applications to Geotechnical Centrifuge Modelling. In: Wu, W., Yu, HS. (eds) Proceedings of China-Europe Conference on Geotechnical Engineering. Springer Series in Geomechanics and Geoengineering. Springer, Cham. https://doi.org/10.1007/978-3-319-97112-4_155
Download citation
DOI: https://doi.org/10.1007/978-3-319-97112-4_155
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-97111-7
Online ISBN: 978-3-319-97112-4
eBook Packages: EngineeringEngineering (R0)