Spatiotemporal settlement deformation characteristics analysis of rockfill dam with anti-impact FBG sensing array

IF 5.7 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Acta Geotechnica Pub Date : 2025-04-28 DOI:10.1007/s11440-025-02612-z

Heming Han, Xingxing Huang, Bin Shi, Xuedong Zhang, Guangqing Wei, Fusheng Zha

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引用次数: 0

Abstract

With the widespread application of rockfill dams, preventing potential failures in rockfill dams during the construction and operation periods is critically important. Settlement monitoring of rockfill dams is an efficient and feasible method of the disaster prevention. However, the current dam settlement monitoring technology is mostly point-based and has a low survival rate with the rockfill construction condition. To address the issue, the FBG sensing array is proposed to continuously obtain the rockfill dam settlement in space and time. The FBG sensing array employs advanced grating direct writing technology and packaging method, which has the advantages of high sensitivity and impact resistance. Furthermore, tests were conducted to validate the sensor performance. Finally, the proposed method was applied to the settlement monitoring of a rockfill dam on the Jinsha River in Sichuan, China. The research results demonstrate that the installed FBG sensing array successfully captures spatiotemporal continuous settlement data of the rockfill dam. Analysis of on-site monitoring data revealed the spatiotemporal deformation characteristics of the rockfill dam. Intensive rainfall significantly contributed to settlement in the middle and upper parts of the rockfill dam during operation. The proposed method comprehensively captures dam deformation data in advance, which is of great significance for the early warning of dam instability.

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基于抗冲击FBG传感阵列的堆石坝时空沉降变形特征分析

随着堆石坝的广泛应用，防止堆石坝在建设和运行期间的潜在破坏至关重要。堆石坝沉降监测是一种有效可行的防灾手段。然而，目前的大坝沉降监测技术多为点阵监测，且随堆石料施工条件的变化成活率较低。为了解决这一问题，提出了光纤光栅传感阵列来连续获取堆石坝的空间和时间沉降。FBG传感阵列采用先进的光栅直写技术和封装方法，具有灵敏度高、抗冲击等优点。此外，还进行了测试以验证传感器的性能。最后，将该方法应用于四川金沙江某堆石坝的沉降监测。研究结果表明，所安装的光纤光栅传感阵列成功地捕获了堆石坝的时空连续沉降数据。通过对现场监测数据的分析，揭示了堆石坝的时空变形特征。在运行过程中，强降雨对堆石坝中上部沉降有重要影响。该方法能全面提前捕获大坝变形数据，对大坝失稳预警具有重要意义。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Acta Geotechnica ENGINEERING, GEOLOGICAL-

CiteScore

9.90

自引率

17.50%

发文量

297

审稿时长

4 months

期刊介绍： Acta Geotechnica is an international journal devoted to the publication and dissemination of basic and applied research in geoengineering – an interdisciplinary field dealing with geomaterials such as soils and rocks. Coverage emphasizes the interplay between geomechanical models and their engineering applications. The journal presents original research papers on fundamental concepts in geomechanics and their novel applications in geoengineering based on experimental, analytical and/or numerical approaches. The main purpose of the journal is to foster understanding of the fundamental mechanisms behind the phenomena and processes in geomaterials, from kilometer-scale problems as they occur in geoscience, and down to the nano-scale, with their potential impact on geoengineering. The journal strives to report and archive progress in the field in a timely manner, presenting research papers, review articles, short notes and letters to the editors.