ABSTRACT: It is not easy to assess the stability of vertical soil walls reinforced by geogrids during and after construction. This paper describes a unique monitoring system called an ‘optical fibre sensor geogrid' in which an optical fibre sensor is installed within a longitudinal member of a geogrid reinforcement material. The structure of the optical fibre sensor and the measuring method to record strain in the geogrid are described. Laboratory tests were first carried out to assess the accuracy of geogrid strain measurements using the optical fibre sensor method. Optical fibre sensor geogrids were then used to measure the strain in embedded geogrid layers in three reinforced soil walls constructed in the field. The system allows the stability of reinforced soil walls to be monitored continuously during and after construction, and a stability evaluation index to be assigned to the walls based on peak strain readings.
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August 2009
Research Article|
August 01 2009
A new optical fibre sensor to assess the stability of geogrid-reinforced soil walls
A. Yashima;
A. Yashima
1
Professor, Department of Civil Engineering, Gifu University, Yanagido 1-1, Gifu 501-1193, Japan, Telephone: +81 58 293 2419, Telefax: +81 58 293 2419, E-mail: yashima@gifu-u.ac.jp
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S. Tsuji;
S. Tsuji
2
Assistant Professor, Department of Civil Engineering, Gifu University, Yanagido 1-1, Gifu 501-1193, Japan, Telephone: +81 58 293 2462, Telefax: +81 58 293 2462, E-mail: s_tsuji@gifu-u.ac.jp
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K. Yoshida;
K. Yoshida
3
Chief, Tokyo Sales Department, Maeda Kosen Co. Ltd, Hisamatsu-cho 9-9, Nihonbashi, Chuo-ku, Tokyo, 103-0005, Japan, Telephone: +81 3 3663 7897, Telefax: +81 3 3663 9930, E-mail: k_yoshida@mdk.co.jp
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Y. Yokota
Y. Yokota
4
General Manager Corporate Officer, Development Product Department and Engineering Department, Maeda Kosen Co. Ltd, Hisamatsu-cho 9-9, Nihonbashi, Chuo-ku, Tokyo, 103-0005, Japan, Telephone: +81 3 3663 7897, Telefax: +81 3 3663 9930, E-mail: yokota@mdk.co.jp
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Publisher: Emerald Publishing
Received:
April 04 2008
Revision Received:
December 26 2008
Accepted:
May 19 2009
Online ISSN: 1751-7613
Print ISSN: 1072-6349
© 2009 Thomas Telford Ltd
2009
Geosynthetics International (2009) 16 (4): 238–245.
Article history
Received:
April 04 2008
Revision Received:
December 26 2008
Accepted:
May 19 2009
Citation
Yashima A, Tsuji S, Yoshida K, Yokota Y (2009), "A new optical fibre sensor to assess the stability of geogrid-reinforced soil walls". Geosynthetics International, Vol. 16 No. 4 pp. 238–245, doi: https://doi.org/10.1680/gein.2009.16.4.238
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