›› 2010, Vol. 31 ›› Issue (6): 1781-1785.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Feasibility research on soil deformation monitoring with distributed optical fiber sensing technique

LI Ke，SHI Bin，TANG Chao-sheng，WEI Guang-qing，WANG Bao-jun   

  1. ACEI, College of Earth Sciences and Engineering, Nanjing University, Nanjing 210093, China
  • Received:2008-05-06 Online:2010-06-10 Published:2010-06-25

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Abstract:

Soil deformation monitoring is an important task in geotechnical engineering monitoring, of which characters are large scale, big diversity of engineering environment and high requirements of real-time. Hence the conventional measurement and monitoring methods and techniques are more and more not to meet the monitoring demands.The Brilliouin optical time domain reflectometer (BOTDR) is a newly developed innovative measureing technique，which utilizes Brilliouin spectroscopy and optical time domain reflectometry to measure strain generated in optical fibers as distributed in the longitudinal direction. Based on experiment, the drying shrinkage of soil is monitored by BOTDR. Characteristics are analysed; and finally, the feasibility of the distributed optical fiber sensing technique for soil deformation monitoring is verified.

Key words: soil deformation, Brilliouin optical time domain reflectometer (BOTDR), distributed monitoring, sensing optical fiber

CLC Number: 

  • TU 411
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