Bulletin of Surveying and Mapping ›› 2024, Vol. 0 ›› Issue (9): 171-174.doi: 10.13474/j.cnki.11-2246.2024.0931

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Refraction correction of tunnel structure monitoring data based on path meteorological information

BAI Wenfeng, MIN Xing, LUO Haitao   

  1. Guangzhou Metro Design and Research Institute Co., Ltd., Guangzhou 510010, China
  • Received:2024-04-26 Published:2024-10-09

Abstract: The inconsistencies and changes of meteorological conditions in tunnel will adversely affect the monitoring accuracy of tunnel structural deformation based on intelligent total station. Combined with the linear terrain characteristics of tunnel, through the uniform deployment of several meteorological sensors along the monitoring area to collect real-time temperature, pressure and other information, and fitting to obtain the functional relationship with distance. Then obtain the average meteorological information of propagation path of electromagnetic wave to each monitoring section for correction of the corresponding observed values. The experimental results of utilizing a tunnel environment show that the correction of observation values by average meteorological information is helpful to reduce the representative error of meteorological correction and improve the reliability of tunnel structural deformation monitoring by intelligent total station.

Key words: tunnel monitoring, intelligent total station, refraction correction, topographic feature, average meteorologic data

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