A Novel Low-Cost GNSS Solution for the Real-Time Deformation Monitoring of Cable Saddle Pushing: A Case Study of Guojiatuo Suspension Bridge
A Novel Low-Cost GNSS Solution for the Real-Time Deformation Monitoring of Cable Saddle Pushing: A Case Study of Guojiatuo Suspension Bridge
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新型低成本 GNSS 索鞍推送变形实时监测解决方案：以郭家沱悬索桥为例
DOI：
10.3390/rs14205174
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发表时间：
2022-10
期刊：
影响因子：
5
通讯作者：
Maolin Chen
中科院分区：
文献类型：
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作者：
Lidu Zhao;Yihui Yang;Zhongfu Xiang;Shuangcheng Zhang;Xinrui Li;Xuqiao Wang;Xiaping Ma;Chuan Hu;Jianping Pan;Yin Zhou;Maolin Chen
极端荷载、恶劣环境和危险操作导致在建桥梁，特别是大跨度桥梁处于不安全状态。全球导航卫星系统（GNSS）以其自动化、连续性、全天候运行和高精度等显著优势成为变形监测的最佳选择。然而，传统的全球导航卫星系统（GNSS）大地测量仪器由于价格昂贵、体积庞大，其应用受到了限制。因此，我们设计和开发低成本的GNSS设备，通过简化监测模块。通过一个实验的动态场景，证明其跟踪突然变形的能力，我们在中国重庆郭家沱悬索桥作为案例研究所提出的解决方案的性能进行评估。我们构建了一个实时低成本的GNSS监控云平台。低成本的桥梁GNSS监测站分别位于南塔和北塔的顶部，跨中上游和下游，参考站位于距离桥梁管理大楼400 m的稳定区。我们于2022年4月5日进行了低成本GNSS的详细实验评估，并于2022年2月26日进行了动态索鞍推进过程中塔架和主缆的实时变形检测实验。在静态实验中，使用多GNSS解决方案的残差的标准偏差在水平方向上为2 mm，在垂直方向上为5 mm。多GNSS解决方案明显优于BDS/GPS单一系统。动态实验表明，与机器人全站仪测量的位移相比，低成本GNSS测量的南塔和北塔水平误差分别小于0.005 m和0.008 m。这项研究突出了低成本GNSS解决方案在结构健康监测（SHM）应用中的潜力。
Extreme loadings, a hostile environment and dangerous operation lead to the unsafe state of bridges under construction, especially large-span bridges. Global Navigation Satellite Systems (GNSS) tend to be the best choice for real-time deformation monitoring due to the significant advantage of automation, continuation, all-weather operation and high precision. Unfortunately, the traditional geodetic GNSS instrument with its high price and large volume is limited in its applications. Hence, we design and develop low-cost GNSS equipment by simplifying the monitoring module. The performance of the proposed solution is evaluated through an experimental dynamic scenario, proving its ability to track abrupt deformation down to 3–5 mm. We take Chongqing Guojiatuo Suspension Bridge in China as a case study. We build a real-time low-cost GNSS monitoring cloud platform. The low-cost bridge GNSS monitoring stations are located at the top of the south and north towers, midspan upstream and downstream respectively and the reference station is located in the stable zone 400 m away from the bridge management buildings. We conducted a detailed experimental assessment of low-cost GNSS on 5 April and a real-time deformation detection experiment of the towers and main cables during the dynamic cable saddle pushing process on 26 February 2022. In the static experiment, the standard deviation of the residual using the multi-GNSS solution is 2 mm in the horizontal direction and 5 mm in the vertical direction. The multi-GNSS solution significantly outperforms the BDS/GPS single system. The dynamic experiment shows that, compared with the movement measured by the robotic total station, the horizontal error of the south tower and north tower measured by low-cost GNSS is below 0.005 m and 0.008 m respectively. This study highlights the potential of low-cost GNSS solutions for Structural Health Monitoring (SHM) applications.