新型深井阳极地床的施工  

A New Construction Method for Deep—well Anode Bed

作　　者：丁继峰[1] 张波[1] 张成钢[1] 

机构地区：[1]钢铁研究总院青岛海洋腐蚀研究所,山东青岛266071

出　　处：《石油化工腐蚀与防护》2014年第1期30-33,共4页Corrosion & Protection In Petrochemical Industry

摘　　要：管道采用外加电流阴极保护法,具有可靠性强、寿命长、输出电压电流可调及维护保养简便等特点。阳极地床,分为浅埋型和深井型。目前深井阳极施工都是照图施工,设计上一般是参考当地的土壤电阻率,先设定阳极地床的接地电阻值,再设计一定深度,多采用的是预组装阳极,安装完阳极后再测量阳极地床的接地电阻,与设计比对。这种做法有一定的局限性,阳极地床接地电阻设计值和实测值误差较大。文章介绍了一种新的深井阳极地床施工方法可大大减少阳极地床接地电阻设计值和实测值的误差:深井阳极地床施工时,测试长度为300 mm、直径为40 mm的测试棒的接地电阻,利用有关公式反推成井后的土壤电阻率,根据电阻率确定阳极的安装深度。Impressed current cathodic protection has features of high reliability, long service life, adjustable output voltage and current and easy maintenance. There are generally two kinds of anode beds i.e. shallow buried anode bed and deep well anode bed. The deep well anode bed is constructed according to drawings, and is generally designed based upon the electrical resistivity of soil. The anode well＇ s earthing resistivity is first set according to soil resistivity; Then the well depth is designed. Pre - packaged anodes are mostly utilized; The anode well＇ s earthing resistivity is measured after anode installation and compared with the design. This method has disadvantages of bigger difference of anode well＇ s earthing resistivity between the design value and measured value. This paper introduces a new construction method for deep well anode bed, which can greatly reduce the difference. In the construction of deep well anode bed, the grounding resistivity of test bar which is 300 mm long and 40 mm in diameter is measured, and soil resistivity is calculated using relevant formula. The installation depth of anode is then determined according to the resistivity.

关 键 词：深井阳极地床 接地电阻测试方法 电阻平衡 

分 类 号：TE4[石油与天然气工程—油气田开发工程]