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[57320] Artykuł: A qualitative analysis of early defects present in PVC-U sewers but not observed in rigid pipesCzasopismo: Tunnelling and Underground Space Technology Tom: 56, Strony: 202-210ISSN: 0886-7798 Wydawca: PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND Opublikowano: Czerwiec 2016 Autorzy / Redaktorzy / Twórcy Grupa MNiSW: Publikacja w czasopismach wymienionych w wykazie ministra MNiSzW (część A) Punkty MNiSW: 35 Klasyfikacja Web of Science: Article DOI Web of Science Keywords: PVC-U pipes  Sewers defects  Non-destructive inspection  Condition assessment  Trenchless rehabilitation  |
The objective of the study was to analyze early defects in PVC-U sewer pipes that are not observed in rigid pipes. Field investigations were conducted on newly laid PVC-U sewer pipes in more than a dozen cities in Poland using CCTV equipment and a special device for measuring deflections. The analysis focused on qualitative data concerning defects observed in PVC-U sewers. Three types of defects, i.e. dents, deflections and buckling, were thoroughly analyzed to determine whether trenchless rehabilitation of such pipes is possible and to improve the existing sewer deterioration models. The major conclusions concern the types, sizes and frequencies of defects in PVC-U pipes, their causes, and the possibility of future rehabilitation as well as the improvement in the deterioration models. (C) 2016 Elsevier Ltd. All rights reserved.