Piezoelectrics & Acoustooptics, Volume. 42, Issue 1, 108(2020)
Research on Monitoring of Horizontal Displacement Field of Deep Soil Based on OFDR Technology
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
Received: Jul. 4, 2019
Accepted: --
Published Online: Apr. 21, 2022
The Author Email: Yangyang SUN (bryant8011@163.com)