Long-term Field Corrosion Monitoring in Supporting Structures of China Xiamen Xiangan Subsea Tunnel
来源期刊：Acta Metallurgica Sinica2017年第4期
论文作者：Chao-Yang Gong Xiao-Yong He Yong-Wei Li Si-Zhe He Xuan Cheng Liu-Ying Huang Ying Zhang Jiu-Bin Chen Shao-Hui Xu Jian-Bin Zhang Chao Zeng
文章页码：399 - 408
摘 要：Xiamen Xiangan Subsea Tunnel is the first undersea tunnel constructed in China.It has become the major undersea pathway connecting Xiamen Island and Xiangan District since its operation in 2010.The total length is 6.05 km with the undersea length of 4.2 km.In an effort to onsite-monitor reinforcement corrosion in concrete structures,the commercially available CorroWatch multiprobe sensors and ERE-20 reference electrodes were pre-embedded in the selected locations and positions of supporting structures during the tunnel constructions.The real-time data have been collected annually by onsite measurements for 6 years.In this paper,the feasibility of the onsite corrosion monitoring system and suitability of the measured parameters including corrosion current,potential and temperature are discussed based on the preliminary results.The measured typical cyclic-type variations in corrosion current and temperature with monitoring time might be related to the seasonal changes during the annual routine measurements.The widely scattered corrosion potentials that are fluctuated complicatedly reflected localized differences in the vicinity of rebar and concrete.These findings,along with the progressively ongoing research,will provide valuable information in structural durability for service life prediction of reinforced concrete structures exposed to marine environments.
Chao-Yang Gong1,2，Xiao-Yong He1，Yong-Wei Li1，Si-Zhe He1，Xuan Cheng1,2，Liu-Ying Huang1,2，Ying Zhang1,2，Jiu-Bin Chen3，Shao-Hui Xu3，Jian-Bin Zhang3，Chao Zeng3
1. Department of Materials Science and Engineering,College of Materials,Xiamen University2. Fujian Key Laboratory of Advanced Materials (Xiamen University)3. Xiamen Road and Bridge Construction Group Co.,Ltd
摘 要：Xiamen Xiangan Subsea Tunnel is the first undersea tunnel constructed in China.It has become the major undersea pathway connecting Xiamen Island and Xiangan District since its operation in 2010.The total length is 6.05 km with the undersea length of 4.2 km.In an effort to onsite-monitor reinforcement corrosion in concrete structures,the commercially available CorroWatch multiprobe sensors and ERE-20 reference electrodes were pre-embedded in the selected locations and positions of supporting structures during the tunnel constructions.The real-time data have been collected annually by onsite measurements for 6 years.In this paper,the feasibility of the onsite corrosion monitoring system and suitability of the measured parameters including corrosion current,potential and temperature are discussed based on the preliminary results.The measured typical cyclic-type variations in corrosion current and temperature with monitoring time might be related to the seasonal changes during the annual routine measurements.The widely scattered corrosion potentials that are fluctuated complicatedly reflected localized differences in the vicinity of rebar and concrete.These findings,along with the progressively ongoing research,will provide valuable information in structural durability for service life prediction of reinforced concrete structures exposed to marine environments.
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