基于BOFDA的地面塌陷变形分布式监测模型试验研究

Experimental Study on Distributed Monitoring of Ground Collapse Deformation Based on BOFDA

地面塌陷变形作为一种分布广泛的地质灾害已成为目前城市发展中亟待解决的一个问题。文章使用布里渊光频域分析(BOFDA)技术对地面塌陷变形进行分布式监测模型实验研究。利用自制的地面塌陷物理模型,对不同类型、不同厚度土体在塌陷过程中的变形进行分布式光纤监测,并对其试验结果进行对比分析。结果表明:基于BOFDA分布式光纤传感技术可有效捕捉到地面塌陷变形的发生和发展过程,并较为准确地反映出地面的塌陷变形规律。研究结果为该技术在地面塌陷变形监测的推广应用提供一定的参考依据。

Ground collapse is a geological disaster,which will become an urgent problem in urban development.The distributed monitoring model test of ground collapse was carried out based on Brillouin Optical Frequency Domain Analysis(BOFDA)technology in this study.A self-made model was used to test the deformation of ground collapse with different types and thicknesses of soil conditions.The results indicated that the distributed optical fiber sensing technology based on BOFDA can capture the occurrence and development process of ground collapse and reflect the deformation law of the soil effectively.The research results provide a reference for popularization and application of this technique in deformation monitoring of ground collapse.