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首页> 外文期刊>Journal of Infrastructure Systems >Quantifying Effectiveness of Cathodic Protection in Water Mains: Case Studies
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Quantifying Effectiveness of Cathodic Protection in Water Mains: Case Studies

机译：定量研究水管中阴极保护的有效性：案例研究

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摘要

Cathodic protection is a viable measure to extend the residual life of water mains and thus defer capital investments in their rehabilitation and renewal. The effectiveness of cathodic protection varies with the unique set of conditions under which it is applied and is therefore difficult to quantify. Consequently, reported case histories have been largely anecdotal and most often based on the observed reduction of water main breaks following the application of cathodic protection. Models to assess the impact of cathodic protection programs were proposed in a previous companion paper "Quantifying the Effectiveness of Cathodic Protection in Water Mains: Theory." This paper describes the application of these models to five groups of water mains from two water utilities that have had on-going programs of hot spot and retrofit cathodic protection. The case histories show that cathodic protection programs (hot spot and retrofit strategies) have had a significant effect on reducing breakage rates, however, in some cases it appears that the much cheaper hot spot strategy is sufficiently effective and there is no need to retrofit as well. The proposed analytical methods should assist water utilities to optimize the implementation and scheduling of future cathodic protection programs.
机译：阴极保护是延长水管剩余寿命并因此延缓其修复和更新资本投资的可行措施。阴极保护的有效性随应用条件的独特设置而变化，因此难以量化。因此，报道的病史在很大程度上是轶事，并且大多数情况下是基于观察到的应用阴极保护后的水主要破坏减少的情况。在先前的同伴论文“量化供水总管中阴极保护的有效性：理论”中提出了评估阴极保护计划影响的模型。本文介绍了这些模型在两个供水设施中的五个供水总管中的应用，这些供水设施已经进行了热点和阴极保护改造。案例历史表明，阴极保护程序（热点和改造策略）对降低破损率有显著作用，但是，在某些情况下，似乎便宜得多的热点策略已经足够有效，因此无需进行改造。好。拟议的分析方法应有助于水务公司优化未来阴极保护计划的实施和进度。

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