doi: 10.13544/j.cnki.jeg.2018067
李豪杰1, 朱鸿鹄1,2, 施斌1, 陈晓平3
1.南京大学地球科学与工程学院 南京 210023
2.南京大学苏州高新技术研究院 苏州 215123
3.暨南大学力学与建筑工程学院 广州 510632
摘要: 近30年来，随着基础设施建设和工业化、城镇化进程的加快，我国各地出现了一系列与地面变形相关的灾害，造成了很大的经济损失和人员伤亡。地面变形的监测对预防地面塌陷、地面沉降和地基失稳等灾害有着极其重要的地位，亟需一种灵敏度高、动态范围大、性能稳定同时兼顾经济性的监测系统，以弥补常规技术在实时性、覆盖面与精度等方面的不足。本文详细介绍了分布式光纤传感（DFOS）的基本原理和其在地面变形监测工作中的独特优势，列举了几种常见的DFOS技术，并综述了这些技术的研究进展及其在地面变形机理研究及工程实践中的应用，对不同的监测方案和铺设工艺进行了对比分析。最后总结了基于DFOS的地面变形监测技术当前存在的瓶颈，指出了今后该课题研究的发展趋势。
关键词: 地面沉降 / 地裂缝 / 传感光纤 / 分布式感测 / 现场监测
Abstract: In the past three decades, along with the acceleration of infrastructure construction and urbanization, a series of disasters related to ground deformation have emerged in various parts of China, resulting in a series of economic losses and casualties. Ground deformation monitoring plays an important role in preventing ground subsidence, ground subsidence and foundation instability. The conventional monitoring technologies is more and more difficult to meet the requirements of engineering practices in terms of real-time performance, coverage and accuracy. Therefore, a reliable monitoring system with high sensitivity, large dynamic range, stable performance and economic consideration is urgently needed. This paper introduces the working principle of distributed fiber optic sensing (DFOS) technologies and their unique advantages in ground deformation monitoring. This paper lists several common distributed optical fiber sensing technology, and summarized the research progress of the technology and its application in ground deformation mechanism study and engineering practice, the different monitoring scheme and the laying process comparative analysis. At last, the current bottleneck of ground deformation monitoring technology based on DFOS is summarized, and the development trend of this research is pointed out in the future.
Key words: Land subsidence / Ground fissure / Sensing optical fiber / Distributed sensing / Field monitoring
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