Optimization Discussion of Anchor Channel Standard for Overhead Contact Line in Railway Tunnel
ZHU Feixiong1, WANG Tao2
1. China Railway Economic Planning and Research Institute Co. Ltd, Beijing 100038, China; 2. China Academy of Railway Science Corporation Limited, Beijing 100081, China
Abstract:Research purposes: There are great disputes on the design service life and anti-corrosion treatment method of carbon steel channel of OCS anchor channel in railway tunnel, which makes it difficult to implement Anchor Channel for Overhead Contact System in Electrified Railway TB/T 3329—2013. Through the investigation and technical analysis of the requirements of relevant railway standards at home and abroad, this paper comprehensively compares the three anti-corrosion schemes of hot-dip galvanizing, co-permeating-passivating-coating anticorrosion (PCA), hot dip galvanizing + surface coating from railway standard support, inspection test pass, engineering application, environmental protection, energy conservation and anti-corrosion production cost, and finds out the solutions. Research conclusions: (1) The design service life of the channel is related to the environmental corrosion grade, and there is no direct quantitative conversion relationship with the corrosion resistance of the channel anti-corrosion coating. (2) The designed service life of the channel shall meet the design life requirements of the OCS system operation department for the channel, or it shall be divided into three grades of 30 years, 50 years and 100 years according to the importance grade of the tunnel OCS for selection of specific engineering construction projects. (3) The comprehensive comparison of three anti-corrosion schemes of hot-dip galvanizing, PCA and hot-dip galvanizing + surface coating shows that PCA scheme is the best. (4) PCA anti-corrosion treatment process is added to TB/T 3329—2013 standard to meet the engineering requirements. (5) The research results can provide reference for the revision of TB/T 3329—2013 standard and the design, manufacture, operation and maintenance of OCS anchor channel in railway tunnel.
朱飞雄, 王涛. 铁路隧道内接触网预埋槽道标准的优化探讨[J]. 铁道工程学报, 2022, 39(5): 98-101.
ZHU Feixiong, WANG Tao. Optimization Discussion of Anchor Channel Standard for Overhead Contact Line in Railway Tunnel. Journal of Railway Engineering Society, 2022, 39(5): 98-101.
EN 1992-4-3:2018,混凝土用紧固件设计 第4-3部分:槽道[S].EN 1992-4-3:2018,Design of Fastenings for Use in Concrete Part 4-3: Anchor Channels[S].
[6]
GB/T 19292.2—2018,金属和合金的腐蚀 大气腐蚀性 第2部分:腐蚀等级的指导值[S].GB/T 19292.2—2018,Corrosion of Metals and Alloys——Corrosivity of Atmospheres Part 2:Guiding Values for the Corrosivity Categories[S].
[7]
周海,陈飞,姚斌,等.铸钢表面多元共渗工艺和性能研究[J]. 材料热处理学报,2006(5):104-107.Zhou Hai, Chen Fei, Yao Bin, etc. Study on Process of Multi-element Permeation on Cast Steel Surface[J].Transactions of Materials and Heat Treatment, 2006(5):104-107.
[8]
Q/CR 749.3—2020,铁路桥梁钢结构及构件保护涂装与涂料 第3部分:附属钢结构[S].Q/CR 749.3—2020,Protective Coating and Painting for Steel Structures and Components of Railway Bridge Part 3:Auxiliary Steel Structure[S].