Monitoring of Deformation Behaviour of Unsaturated Soil Slope using Distributed Optical Fibre Sensor
A distributed optical fibre sensing system named Brillouin Optical Time Domain Analysis (BOTDA) is used to monitor the strain development of a laboratory soil slope model. The technology is yet to be fully implemented due to uncertainties of attachment method or the best way to set up optical fibre...
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| Main Authors: | , |
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| Format: | Article |
| Language: | en |
| Published: |
Penerbit UTHM
2020
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| Subjects: | |
| Online Access: | http://ir.unimas.my/id/eprint/33667/1/Monitoring%20of%20Deformation%20Behaviour%20of%20Unsaturated%20Soil%20Slope%20using%20Distributed%20Optical%20Fibre%20Sensor.pdf http://ir.unimas.my/id/eprint/33667/ https://doi.org/10.30880/ijie.2020.12.09.024 |
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| Summary: | A distributed optical fibre sensing system named Brillouin Optical Time Domain Analysis (BOTDA) is used to monitor the strain development of a laboratory soil slope model. The technology is yet to be fully implemented due to uncertainties of attachment method or the best way to set up optical fibre sensors for geo-structure health monitoring. The aim of study is to evaluate the deformation behaviour subjected to the development of horizontal strains from Brillouin-based optical fibre sensor of a residual soil slope under loading impact using BOTDA technology. In this study, a soil-embedded strain sensor placement approach was proposed to be installed in the 1g model of soil slope which was achieved via the horizontal planting of a three-layered optical fibre cable in S-curve forming slope. In this paper, however, only pilot tests result is demonstrated for preliminary data interpretation purposes. From the preliminary laboratory tests, the results show the soil-embedded sensing fibre arrangement has efficiently detected and measured the horizontal strain deformation due to loading. Therefore, it can be concluded that the sensing fibre was well-responded with the soil movement under loading impact. |
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