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Fluid migration into lined pipelines

机译：流体迁移到衬砌管道中

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摘要

Lining of a pipe with a polymeric liner is a viable trenchless technology for rehabilitating sewer pipelines. Polymeric liners are typically installed within the deteriorated segments of a sewer line, from one access hole to the next, to essentially create a new pipe within the old pipe without the need for excavation and removal. However, some concerns exist regarding the need to grout or seal the joints where the new liner connects with access holes and laterals. The purpose of this study is to provide some insight into the degree of fluid migration into, or from, the system at these connecting points under simulated field conditions. Four groups of three similar vitrified clay pipelines were lined with different types of deformed-reformed or fold-and-form (DR/FF) liners and cured-in-place-pipe (CIPP) liners then tested to assess the conditions of the annular space between the liners and the host pipe. Fluid migration was detected around all liners and flow rates in the annular space increased with the head difference between the upstream and downstream ends of the test pipelines. No significant changes were observed in the flow rates within the annular space in the tested pipelines over the eight-week testing period.
机译：具有聚合物衬里的管道衬里是一种可行的无沟槽技术，用于修复下水道管道。聚合物衬里通常安装在下水道的恶化部分中，从一个进入孔到下一个进入孔，以基本上在旧管道内创建新管道，而无需进行挖掘和拆除。但是，对于新衬管与检修孔和支管连接处的接缝需要灌浆或密封，存在一些担忧。这项研究的目的是在模拟的现场条件下，对这些连接点处流体进出系统的迁移程度提供一些见识。四组三个类似的玻璃化粘土管道分别衬有不同类型的变形或折叠形式（DR / FF）衬里和现场固化管（CIPP）衬里，然后进行测试以评估环形条件衬管和主管之间的空间。在所有衬管周围均检测到流体迁移，并且环形空间中的流速随测试管道上游端和下游端之间的压头差而增加。在八周的测试期间内，被测管道的环形空间内的流量没有观察到明显变化。

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