Fibre Bragg grating based effective soil pressure sensor for geotechnical applications

Ricardo Correia; Jin Li; Stephen Staines; Edmon Chehura; Stephen W. James; Joel Kutner; Paul Dewhurst; Pedro Ferreira; Ralph P. Tatam

doi:10.1117/12.835751

5 October 2009 Fibre Bragg grating based effective soil pressure sensor for geotechnical applications

Ricardo Correia, Jin Li, Stephen Staines, Edmon Chehura, Stephen W. James, Joel Kutner, Paul Dewhurst, Pedro Ferreira, Ralph P. Tatam

Author Affiliations +

Proceedings Volume 7503, 20th International Conference on Optical Fibre Sensors; 75030F (2009) https://doi.org/10.1117/12.835751
Event: 20th International Conference on Optical Fibre Sensors, 2009, Edinburgh, United Kingdom

Abstract

An effective-soil-pressure sensor for geotechnical applications based on Fibre Bragg Gratings is presented. The sensor simultaneous measures total soil pressure and pore pressure, allowing the calculation of the effective stress of soil. Calibration of the sensor using pressurised air demonstrated a pressure sensitivity of 2.02x10^-3 ± 2.84x10^-5nm/kPa and 1.87x10^-3 ± 6.88x10^-5nm/kPa for the total and pore pressure respectively. This corresponds to a pressure resolution of 4.95x10^-1kPa and 5.46x10^-1kPa for total and pore pressure using a 1pm interrogation system. Measurements undertaken in two types of soil demonstrated dependence of the total pressure sensitivity on soil density/stiffness. Pore pressure measurements agreed well with the preliminary calibration.

Citation Download Citation

Ricardo Correia, Jin Li, Stephen Staines, Edmon Chehura, Stephen W. James, Joel Kutner, Paul Dewhurst, Pedro Ferreira, and Ralph P. Tatam "Fibre Bragg grating based effective soil pressure sensor for geotechnical applications", Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75030F (5 October 2009); https://doi.org/10.1117/12.835751

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available