Piezoelectrics & Acoustooptics, Volume. 42, Issue 1, 108(2020)

Research on Monitoring of Horizontal Displacement Field of Deep Soil Based on OFDR Technology

QIU Tangguo1, SUN Yangyang2、*, LU Tianming3, and ZHU Shaohua4
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  • 1[in Chinese]
  • 2[in Chinese]
  • 3[in Chinese]
  • 4[in Chinese]
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    The monitoring of horizontal displacement field of deep soil is an important index for the safe excavation of foundation pit. The existing inclinometer method consumes a lot of manpower and has a low accuracy, but it is still the main method to obtain horizontal displacement at present. A distributed optical fiber measurement method based on the optical frequency domain reflectometry (OFDR) technology is proposed in this paper. The conversion relationship between the strain-deflection deformations is derived. The feasibility and accuracy of the distributed optical fiber inclination measurement are verified by indoor experiments. The measurement method based on OFDR has been applied to a foundation pit project in Suzhou, and the displacement information of deep soil during the excavation process is obtained accurately.

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    QIU Tangguo, SUN Yangyang, LU Tianming, ZHU Shaohua. Research on Monitoring of Horizontal Displacement Field of Deep Soil Based on OFDR Technology[J]. Piezoelectrics & Acoustooptics, 2020, 42(1): 108

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    Paper Information

    Received: Jul. 4, 2019

    Accepted: --

    Published Online: Apr. 21, 2022

    The Author Email: Yangyang SUN (bryant8011@163.com)

    DOI:10-11977/j.issn.1004-2474.2020-01-024

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