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A retrospective evaluation of the performance of liner systems used to rehabilitate municipal gravity sewers

机译:对用于修复市政重力下水道的衬管系统性能的回顾性评估

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This paper provides new results gathered as part of a 6-year project funded by the U.S. Environmental Protection Agency (USEPA) to document the in-service performance of trenchless pipe rehabilitation techniques. The results from a pilot study focusing on cured-in-place pipe (CIPP) rehabilitation technologies were previously reported and the research program was extended to allow collection of additional CIPP samples and also to extend the study to other rehabilitation technologies (specifically included in this Phase 2 research were fold-and-form, deform reform, and sliplining technologies). The establishment of a database to house performance evaluation data for rehabilitation technologies used in the water and wastewater sectors is also described. The additional retrospective data for CIPP and other rehabilitation technologies are reported and an overall assessment of CIPP life cycle performance is provided. The examination of CIPP liners with up to 34 years in service and other rehabilitation technologies with up to 19 years of service has shown that all of the rehabilitation technologies are showing little evidence of deterioration in service. The test results for 18 CIPP samples from nine cities across North America indicate that properly designed and installed CIPP liners should meet and likely exceed the typical 50-year expected design life. For the fold-and-form, deform reform, and sliplining technologies, there are only two to three samples per rehabilitation technology and hence less can be said about overall performance. Nevertheless, all of the samples tested still met the material property requirements at installations after 14-19 years of service. In summary, the results provide an excellent prognosis for the rehabilitation technologies evaluated. (C) 2015 Elsevier Ltd. All rights reserved.
机译:本文提供了由美国环境保护署(USEPA)资助的为期6年的项目的新成果,以记录非开挖管道修复技术的使用性能。先前曾报道过一项侧重于现场固化管道(CIPP)修复技术的试验研究的结果,并且该研究计划得到扩展,以允许收集其他CIPP样本,并将该研究扩展至其他修复技术(具体包括在本指南中)。第2阶段的研究是折叠成型,变形改造和衬砌技术。还描述了建立一个数据库来容纳水和废水部门使用的修复技术的性能评估数据。报告了CIPP和其他康复技术的其他回顾性数据,并对CIPP生命周期绩效进行了总体评估。对使用了长达34年的CIPP衬管以及使用了长达19年的其他修复技术的检查表明,所有修复技术几乎都没有显示出服务质量下降的迹象。来自北美9个城市的18个CIPP衬管的测试结果表明,正确设计和安装的CIPP衬管应符合并可能超过典型的50年预期设计寿命。对于折叠和变形,变形变形和滑模技术,每种康复技术只有两到三个样本,因此关于整体性能的说法很少。但是,经过14-19年的服务后,所有测试的样品仍满足安装时的材料性能要求。总之,结果为所评估的康复技术提供了良好的预后。 (C)2015 Elsevier Ltd.保留所有权利。

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