某跨海悬索大桥主缆腐蚀环境在线监测系统设计及试验研究

张毅, 周遇袁, 赵梦瑶, 刘心怡, 马小泽, 董泽华

doi:10.16577/j.issn.1001-1560.2024.0238

材料保护 >

2024 , Vol. 57 >Issue 10: 175 - 181

DOI: https://doi.org/10.16577/j.issn.1001-1560.2024.0238

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某跨海悬索大桥主缆腐蚀环境在线监测系统设计及试验研究

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¹武汉科思特仪器股份有限公司； ²华中科技大学化学与化工学院

董泽华(1968-)，博士，教授，研究方向为材料腐蚀及其在线监测，E-mail:zhdong＠hust.edu.cn

收稿日期: 2024-04-29

修回日期: 2024-06-17

录用日期: 2024-06-18

网络出版日期: 2024-12-22

基金资助

国家自然科学基金资助(51771079)

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Design and Experimental Study on the Online Monitoring System for Corrosion Environment of the Main Cable in a Trans-Strait Suspension Bridge

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(1.Wuhan CorrTest Instrument Co.， Ltd.， Wuhan 430074， China；2.School of Chemistry and Chemical Engineering， Huazhong University of Science and Technology， Wuhan 430074， China)

DONG Zehua(1968-)， Ph.D.， Professor， Research Focus: Corrosion and Protection of Material， Corrosion Electrochemistry and Corrosion Monitoring Techniques， E-mail:zhdong＠hust.edu.cn

Received date: 2024-04-29

Revised date: 2024-06-17

Accepted date: 2024-06-18

Online published: 2024-12-22

Supported by

National Natural Science Foundation of China (51771079)

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摘要

主缆是悬索桥的生命线，悬索桥主缆腐蚀或断丝直接关系到桥梁运行安全和服役寿命。采用精密电阻腐蚀监测探头、低功耗数据采集器、温度补偿和无线组网技术，在深中通道伶仃洋跨海悬索桥主缆气夹内安装了14套腐蚀监测传感器。探头以主缆裸钢丝为测试元件，实时监测气夹内高强钢丝的腐蚀速率和腐蚀量，并据此建立了一套分布式主缆腐蚀无线监控网络。通过5 个月的腐蚀监测现场试验，发现下游主缆的腐蚀速率明显高于上游，且最严重区出现在主缆最低跨部位，其平均腐蚀速率高达147.91 μm/a。这表明桥梁建设初期由于主缆除湿除盐装置没有启动，主缆内残留的盐粒和水汽会引起主缆严重腐蚀。根据所建立的主缆内腐蚀数据可视化在线监测系统，可为主缆防护方案的优化提供指导，保证大型悬索桥的运行安全。

关键词： 悬索桥; 主缆; 腐蚀监测; 电阻探针; 主缆防护

本文引用格式

张毅, 周遇袁, 赵梦瑶, 刘心怡, 马小泽, 董泽华 . 某跨海悬索大桥主缆腐蚀环境在线监测系统设计及试验研究[J]. 材料保护, 2024 , 57(10) : 175 -181 . DOI: 10.16577/j.issn.1001-1560.2024.0238

Abstract

The main cable of a suspension bridge is the lifeline of the bridge.The corrosion or broken wires of the main cable in the suspension bridge are directly related to the operation safety and service life of the suspension bridge.In this study， a total of 20 corrosion monitoring sensors were installed in the main cable sheath of the Lingdingyang trans-strait Suspension Bridge in the Shenzhen-Zhongshan Channel using precise resistance corrosion monitoring probes，low-power data collectors，temperature compensation，and wireless networking technology.The probes utilized the bare steel wires of the main cable as the testing elements to monitor in real-time the corrosion rate and amount of corrosion of the high-strength steel wires in the sheath， establishing a distributed wireless monitoring network for main cable corrosion.Through five months of corrosion monitoring tests，it was found that the corrosion rate of the downstream main cable was significantly higher than that of the upstream section，with the most severe corrosion occurring at the lowest span of the main cable，where the average corrosion rate reached 147.91 μm/a.This indicated that， due to the failure to activate the dehumidification and desalination device during the early stages of bridge construction，the residual salt particles and moisture inside the main cable caused severe corrosion.Based on the visual online monitoring of corrosion data inside the main cable， guidance was provided for optimizing the protection scheme of the main cable， ensuring the safe operation of large suspension bridges.

Key words： suspension bridge; main cable; corrosion monitoring; electrical resistance probe; main cable protection

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