A Fibre-optic Strain Measurement System to Monitor the Impact of Tunnelling on Nearby Heritage Masonry Buildings

A Fibre-optic Strain Measurement System to Monitor the Impact of Tunnelling on Nearby Heritage Masonry Buildings
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光纤应变测量系统可监测隧道开挖对附近遗产砖石建筑的影响

DOI:
10.1080/15583058.2021.1884318
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发表时间:
2021
影响因子:
2.4
通讯作者:
Acikgoz S
Acikgoz S
中科院分区:
工程技术3区
文献类型:
--
作者:
Acikgoz S

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光纤传感技术提供了在长时间内实时测量详细结构响应的机会。本文介绍了首次应用光纤布拉格光栅(FBG)测量来监测隧道工程对英国伦敦两座一级建筑的影响。在描述了应变传感技术背后的原理之后,讨论了实验室测试。这些测试用于校准应变传感器和验证新开发的温度补偿技术。然后介绍了传感器的布置及其在建筑物上的安装。随后三年监测期的光纤温度和应变测量结果与其他独立测量结果进行了比较。事实证明,该系统能够以可靠的方式直接实时监测隧道施工对历史资产的短期和长期影响。
Fibre-optic sensing technologies provide the opportunity to measure detailed structural response in real time over long durations. This paper describes a first-of-its-kind application of Fibre Bragg Grating (FBG) measurement to monitor the impact of tunnelling works on two Grade-I listed buildings in London, UK. After describing the principles behind the strain sensing technology, laboratory tests are discussed. These tests are used to calibrate strain sensors and validate the newly developed temperature compensation technique. The arrangement of sensors and their installation on the buildings is then presented. Fibre-optic temperature and strain measurements from the ensuing three-year monitoring period are compared with other independent measurements. It is demonstrated that the system enabled direct real-time monitoring of both the short- and long-term impact of tunnelling on the historic assets in a reliable manner.
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