大直径顶管工程的管道强制电流法阴极保护

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关键词:: 水下管道;防腐;阴极保护;外加电流;参考电极
Underwater pipeline;Corrosion control;Cathodic protection;Impressed current;Refer-ence electrode

摘要:: 沉井顶管是管道穿越工程常用的施工方法，由于管道在顶管过程中与地下的砂石摩擦，外防腐涂层会受到不同程度的损伤，而且埋地深度10m以下的大口径（D2～3m）穿越管道在地下所受的腐蚀是不可抵估的，实施强制电流法阴极保护是有效的防护手段。该文结合D2.6m管道顶管穿越工程介绍强制电流法阴极保护的设计要点和施工方法。
Pushing pipe with open caisson is the common construction method for pipe engineering. Duringpushing the pipe clashes with sandstone underground, outer anticorrosive coating will be damaged. Itcould not be underestimated that the large pipe of 2m to 3m diameter will be corroded lOm under-ground.crossingCompulsory electric current method of cathodic protectionis the valid measure. Based onstructionproject by pushing pipe of 2.6m diameter the article introduces main points of design and con-method for this technology.

1998,5(5): 14-16 收稿日期：1998-5-10

分类号：TE97

参考文献：
1 SYJ7一84管道和储罐防腐蚀工程设计规范
2 张承典等.腐蚀与防护，1990(3)