输油管道应用防渗毯效果评价

Effect evaluation of geosynthetic clay liner used in oil pipelines

为全面系统地评价防渗毯材料在输油管道中的应用效果,解决穿越环境敏感区域管道渗漏防护难题,结合防渗毯材料在管道工程中的实际应用,将管道发生事故时的油品泄漏原理、管道阴极保护影响、穿越及水工保护实施技术,与防渗毯材料的技术性能指标、试验检测数据进行对比,从材料性能、实施可靠性、使用寿命及经济性方面进行综合评价。结果表明:防渗毯材料不具有普遍适用性,对于小口径、低压力管道,可以作为有效的防渗措施之一,而对于大口径、高压力管道,则需要单独核算后应用。同时,提供了输油管道防渗防护的评价方法,为将来其他类似保护区的施工防护提供了借鉴。

In order to evaluate systematically the application effect of geosynthetic clay liner （GCL） in oil pipelines and solve the seepage control difficulties while oil pipelines run through the environmentally sensitive regions, the oil leakage principle, the effect of cathodic protection, the pipeline crossing and hydraulic protection technologies in the case of pipeline accidents were compared with the technical performance indicators and test data of GCL based on the its practical application in pipeline engineering. Then, it was comprehensively evaluated from the aspects of material performance, operation reliability, service life and economy. It is indicated that this material is not universally applicable. It can be used as one of the effective measures to control the seepage of small diameter and low pressure pipelines. For large diameter and high pressure pipelines, however, it can be used only after calculation. Besides, the evaluation method for oil pipeline seepage control was established, and it can be used as the reference for the future construction protection in other similar protection zones. （3 Figures, 4 Tables, 20 References）