Abstract
Soil nailing is an effective technique for stabilizing slopes, excavations and retaining walls. Reliable information with respect to stress, strain and displacement of soil nails is useful for analyzing the stability of geotechnical structures. This paper presents a typical study regarding the application of fiber optic sensor technologies in monitoring the mechanical behavior of model soil nails. These technologies include the Lower Coherence Interferometry (LCI), fiber Bragg grating (FBG) technology and Brillioun optic time domain analysis (BOTDA) technology. First, special and simplified calibration methods of different fiber optic sensors are introduced. Then instrumentation methods of different fiber optic sensors for strain measurement of soil nails are presented. Finally typical test observations and results are summarized and analyzed. Test results indicate the FBG strain sensor is appropriate for investigating the axial force/resistance distribution of a soil nail subjected to a pullout force. The LCI and BOTDA technologies are useful in the measurement of the average axial strain distribution/elongation of a soil nail.
| Original language | English |
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| Title of host publication | 14th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering |
| Publication status | Published - 1 Dec 2011 |
| Event | 14th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2011 - Hong Kong, Hong Kong Duration: 23 May 2011 → 27 May 2011 |
Conference
| Conference | 14th Asian Regional Conference on Soil Mechanics and Geotechnical Engineering, ARC 2011 |
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| Country/Territory | Hong Kong |
| City | Hong Kong |
| Period | 23/05/11 → 27/05/11 |
ASJC Scopus subject areas
- Soil Science
- Geotechnical Engineering and Engineering Geology