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基于BOTDA的深基坑桩锚支护结构变形监测
引用本文:李立贡,丁勇,马斌斌,周克明.基于BOTDA的深基坑桩锚支护结构变形监测[J].长江科学院院报,2016(9):48-51.
作者姓名:李立贡  丁勇  马斌斌  周克明
作者单位:1. 南京理工大学理学院,南京,210094;2. 南京水利科学研究院南京水利水文自动化研究所,南京,210012
基金项目:中央级公益性科研院基本科研业务费专项(Y915010)
摘    要:将BOTDA(Brillouin Optical Time Domain Analysis)分布式光纤监测技术应用于深基坑桩锚支护结构的变形监测中。在基坑开挖的过程中,对桩锚支护结构的型钢和预应力锚索进行长期监测,得到了型钢的挠度分布图以及预应力锚索的应力分布图。基于此,分析型钢和锚索受力变形状态,为基坑施工提供可靠参考依据。工程实践表明,基于BOTDA的分布式光纤传感技术具有连续性检测的优点,适合应用于基坑支护结构的变形监测。

关 键 词:深基坑支护  ESC-H钢桩  预应力锚索  BOTDA  变形监测

Deformation Monitoring of Pile and Anchor Supporting Structure of Deep Foundation Pit Using BOTDA
LI Li-gong,DING Yong,MA Bin-bin,ZHOU Ke-ming.Deformation Monitoring of Pile and Anchor Supporting Structure of Deep Foundation Pit Using BOTDA[J].Journal of Yangtze River Scientific Research Institute,2016(9):48-51.
Authors:LI Li-gong  DING Yong  MA Bin-bin  ZHOU Ke-ming
Abstract:BOTDA distributed optic fiber monitoring technology was used to monitor the deformation of pile and an-chor supporting structure of deep foundation pit.Through long-term strain monitoring of H-steel and pre-stressed an-chor of the supporting structure during the excavation process,the deflection distribution of H-steel and stress distri-bution of pre-stressed anchor were obtained.On this basis,the stress and deformation state of H-steel and pre-stressed anchor was analyzed,providing reliable reference for pit construction.Engineering practice shows that de-formation monitoring for foundation pit's supporting structure using distributed optical fiber sensing technology based on BOTDA is feasible and has the advantage of continuous monitoring.
Keywords:deep foundation pit support  ESC-H steel piles  pre-stressed anchor  BOTDA  deformation monitoring
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