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Pile displacement measurement using digital image correlation

机译:使用数字图像相关的桩位移测量

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This article presents a broad overview of the use of digital image correlation (DIC) to measure pile displacement during relatively crude horizontal and vertical load tests. Good correlation was achieved between the dial gauge and DIC measurements, with the DIC possibly outperforming the dial gauge once the soil yielded. Furthermore, the DIC measurements have the advantage of providing more continuous data without interfering with the loading of the piles. The loading technique for the vertical tests has to be improved, as some of the tests failed too quickly for either the DIC or the dial gauges to provide useful measurements. By using more recent processing software (e.g. GeoPIV-RG by Stanier et al 2016), better load control and more accurate validation measurements for digital image correlation can potentially be used to provide non-intrusive displacement measurements of piles during load tests with the same, or better, quality than conventional methods.
机译:本文概述了在相对粗略的水平和垂直载荷测试过程中,使用数字图像相关(DIC)测量桩位移的过程。千分表与DIC测量值之间实现了良好的相关性,一旦土壤屈服,DIC可能会胜过千分表。此外,DIC测量的优势在于可以提供更多连续数据,而不会干扰桩的加载。垂直测试的加载技术必须改进,因为某些测试由于DIC或千分表无法提供有用的测量而太快地失败了。通过使用更新的处理软件(例如Stanier等人的GeoPIV-RG,2016年),更好的载荷控制和更准确的数字图像相关性验证测量可能会用于在载荷测试过程中以相同的方式提供桩的非侵入式位移测量,或比传统方法更好的质量。

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