基于布里渊散射光时域反射测量技术的分布式光纤测斜管研发与应用

发布时间：2018-02-21 09:22

本文关键词： 深层水平位移 BOTDR 分布式光纤测斜管变形监测　出处：《科学技术与工程》2017年30期 　论文类型：期刊论文

【摘要】：深层水平位移是基坑工程安全监控的重要监测指标,通常采用测斜管进行监测,确保基坑的安全与稳定。为了提高测斜管监测结果的精度与自动化程度,弥补传统监测手段的局限与不足,从基于布里渊光时域反射计(BOTDR)光纤监测技术原理和特点出发,研发了一种基于BOTDR技术的分布式光纤测斜管,详细介绍了其制作方法与施工工艺,通过现场基坑测试,获得了分布式光纤测斜管的应变信息,并通过数据分析获得了基坑深层水平位移变化。结果表明:基于BOTDR技术的分布式光纤测斜管能够准确地反映基坑的变形情况,具有很好的工程适用性,且与传统监测手段相比,具有测量精度高、数据采集全面、监测方便、能够实时监测等优点,在基坑工程的变形监测中具有显著的优越性和推广价值。
[Abstract]:The deep horizontal displacement is an important monitoring index of foundation pit engineering safety monitoring. The inclined pipe is usually used to monitor the foundation pit to ensure the safety and stability of the foundation pit, in order to improve the accuracy and automation of the monitoring results of the inclined pipe. Based on the principle and characteristics of optical fiber monitoring technology based on Brillouin optical time domain reflectometer (BOTDR), a distributed optical fiber inclined tube based on BOTDR technology is developed. The fabrication method and construction technology are introduced in detail. The strain information of distributed optical fiber inclined pipe is obtained by field test of foundation pit. The results show that the distributed optical fiber inclined pipe based on BOTDR technology can accurately reflect the deformation of foundation pit, and has good engineering applicability, and compared with the traditional monitoring methods. It has the advantages of high measurement precision, comprehensive data acquisition, convenient monitoring and real-time monitoring. It has obvious advantages and popularization value in the deformation monitoring of foundation pit engineering.
【作者单位】：河海大学岩土力学与堤坝工程教育部重点实验室河海大学岩土工程研究所;南京城建项目建设管理有限公司;南京诚明建设咨询有限公司;
【基金】：国家自然科学基金(51508159) 江苏省自然科学基金(BK20151495) 中央高校基本科研业务费专项资金(2016B20214,2016B06114)资助
【分类号】：TU753

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