摘要
管片螺栓作为衔接盾构管片的主要构件,对盾构隧道的安全服役起着关键作用,螺栓腐蚀则会影响隧道结构安全性能和服役寿命。通过文献调研及现场调研等方法,分析了盾构隧道管片螺栓腐蚀成因,系统总结了管片螺栓防腐措施和腐蚀处理技术措施。研究表明:隧道服役年限和管片渗漏水是影响螺栓腐蚀的重要因素;管片螺栓防腐措施主要采用锌基铬酸盐涂层+螺纹头部抗碱涂层或无铬锌铝片涂层+螺头部抗碱涂层的组合方式;常规管片螺栓除锈措施以机械喷砂除锈最佳,也可采用耐蚀钢螺栓。
As the main component for connecting shield tunnel segments,segment bolts play a crucial role in the safe service of shield tunnels.Corrosion of bolts can affect the safety performance and service life of tunnel structures.Through literature research and on-site research,the causes of corrosion of shield tunnel segment bolts were analyzed,and the anti-corrosion measures and corrosion treatment techniques for segment bolts were systematically summarized.Research has shown that the service life of tunnels and pipe leakage are importantfactors affecting bolt corrosion. The anti-corrosionmeasures for pipe bolt mainly adopt a combination ofzinc based chromate coating+alkali resistant coating onthe threaded head or chromium free zinc aluminum sheetcoating+alkali resistant coating on the threaded head.Mechanical sandblasting is the best rust removal methodfor conventional pipe segment bolts, and corrosionresistantsteel bolts can also be used.
作者
郭华伟
石松涛
豆海涛
李茂然
GUO Huawei;SHI Songtao;DOU Haitao;LI Maoran(China Railway Siyuan Survey and Design Group Co.,Ltd.,Hubei Wuhan 430063 China)
基金
铁四院科研课题资助项目,项目编号:KY2023117E。
关键词
盾构管片
螺栓腐蚀
服役环境
防腐措施
腐蚀处理措施
shield tunnel segments
bolt corrosion
operating environment
corrosion prevention
corrosion treatment measures
