PPP-BOTDA分布式光纤技术在白水河滑坡监测中的应用

doi:10.13722/j.cnki.jrme.2015.0074

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Abstract The object of monitoring lies in the anterior part of Baishuihe landslide. In the deformation monitoring，the PPP-BOTDA distributed optical fiber sensor technology is adopted. The information captured by the device is the strain caused by sliding mass. Two optical fibers，the temperature fiber optic sensor and the strain optical fiber sensor，are buried under the surface of the landslide. For the oscillation of the three groups of monitoring data，the Butterworth low-pass filter is particularly designed to minimize the influence of the noise signals；and the comparison among the four groups of different sampling frequencies were conducted to reveal the most suitable value of the n and the Wn. Then the area difference between the curve and the horizontal axis along the optical fiber line is utilized to make quantitative evaluation of the strain. The findings show that the method of the Butterworth low-pass filter and the area difference value is helpful to indicate the difference of the strain. It is proved to be effective according to the in-site observation. The results present that it is of reference value for the fiber optic sensing technology applying in the landslide monitoring.

Key words： slope engineering PPP-BOTDA distributed optical fiber sensor technology Baishuihe landslide Butterworth low-pass filter area difference

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	Articles by authors
	YI Xianlong
	TANG Huiming
	WU Yiping
	GE Yunfeng
	FAN Xiaoguang
	ZHANG Shen

Cite this article:

YI Xianlong,TANG Huiming,WU Yiping, et al. Application of the PPP-BOTDA distributed optical fiber sensor technology in the monitoring of the Baishuihe landslide[J]. , 2016, 35(S1): 3084-3091.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2015.0074 OR https://rockmech.whrsm.ac.cn/EN/Y2016/V35/IS1/3084

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