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Volume 37 Issue 3
Jun.  2018
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Article Navigation >  CARSOLOGICA SINICA  > 2018  >  37(3): 427-432
LIU Yongli, GUAN Zhende, XIAO Henglin. Monitoring and analysis of deep buried karst soil caves based on BOTDR technology[J]. CARSOLOGICA SINICA, 2018, 37(3): 427-432. doi: 10.11932/karst20180314
Citation: LIU Yongli, GUAN Zhende, XIAO Henglin. Monitoring and analysis of deep buried karst soil caves based on BOTDR technology[J]. CARSOLOGICA SINICA, 2018, 37(3): 427-432. doi: 10.11932/karst20180314
shu

Monitoring and analysis of deep buried karst soil caves based on BOTDR technology

doi: 10.11932/karst20180314
  • 1.

    Hubei Provincial Ecological Road Engineering Technology Research Center，Hubei University of Technology/Guangxi Key Laboratory of Geomechanics and Geotechnical Engineering, Guilin University of Technology

  • 2.

    School of Environmental Studies, China University of Geosciences,Wuhan/Institute of Karst Geology, CAGS

  • 3.

    Hubei Provincial Ecological Road Engineering Technology Research Center，Hubei University of Technology

  • Publish Date: 2018-06-25
    Abstract
  • Surface collapse of karst soil caves can be attributed to many complex factors.The aim of this work is to reveal the stress characteristics of soil caves in the marked areas being monitored. Based on the Terzaghi theory of loose earth pressure, the vertical earth pressure in the loose zone is analyzed. The results show that the location of the loose zone is decided by cave's characteristics and physical and chemical properties of overlying media. Under plane and non-plane strain conditions, the distribution characteristics of vertical earth pressure in the loose zone are obviously different. According to the distribution characteristics of vertical soil pressure in the loose zone, combined with the advantages of Brillouin Optical Time Domain Reflectometry (BOTDR), the application of BOTDR technology to monitor the development of the karst soil cave is proposed. The layout of optical fibers in the monitoring system is analyzed. The quantitative study on the stress field of the soil cave provides a theoretical basis and guidance for the application of BOTDR to monitoring karst soil caves.

     

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