Effect of the Number of Constrictions on the Filtration Behaviour of a Soil-Geotextile System

• Autorzy: Miszkowska Anna , Koda Eugeniusz , Krzywosz Zygmunt

Identyfikatory

DOI

10.5604/01.3001.0013.5862

Warianty tytułu

PL

Wpływ liczby przewężeń na zachowanie się układu grunt-geowłóknina w procesie filtracji

• Języki publikacji: EN

Abstrakty

EN

Nonwoven geotextile filters have been used in geo-environmental engineering for decades to prevent the movement of base soil fine particles, allowing adequate seepage to flow through the geotextile plane. Most of the design criteria developed for nonwoven geotextiles are based only on the comparison between their characteristic opening size and the indicative diameter of the soil to be filtered. In the meantime, the nonwoven geotextile fibrous structure has an influence on the filtration of the soil-geotextile system. In this paper the numbers of constrictions of nonwoven geotextile samples were determined to verify the existence of a correlation between the geotextile structure and the filtration behaviour of soil-geotextile systems. The compatibility between an internally unstable soil and a nonwoven geotextile filter was evaluated using the gradient ratio test. The results obtained can also be the basis for modifying the geotextile filter design and selection criteria.

PL

Spośród różnych materiałów geosyntetycznych, szerokie zastosowanie w systemach filtracyjnych i drenażowych znalazły geowłókniny. Zapobiegają one mieszaniu się materiałów o różnym uziarnieniu umożliwiając jednocześnie swobodny przepływ wody w kierunku prostopadłym do płaszczyzny wyrobu. Dla celów prawidłowego funkcjonowania instalacji odwadniających projektowanie geowłóknin pełniących funkcje filtracyjne sprowadza się do spełnienia trzech podstawowych kryteriów: zatrzymywania cząstek, przepuszczalności oraz odporności na kolmatację. Kryteria te głównie opierają się na porównaniu charakterystycznej wielkości porów geowłókniny z określonymi średnicami zastępczymi gruntu chronionego oraz przepuszczalności geowłókniny w kierunku prostopadłym do płaszczyzny wyrobu ze współczynnikiem filtracji gruntu. Okazuje się jednak, że także struktura geowłókniny ma wpływ na jej właściwości filtracyjne. W prezentacji zostaną przedstawione wyniki badań współczynnika proporcjonalności spadku (GR) geowłóknin o różnej liczbie przewężeń (number of constrictions) zależnej od grubości, porowatości i średnicy pojedynczego włókna materiału, w celu określenia wpływu struktury geowłókniny na jej podatność na proces kolmatacji mechanicznej.

Słowa kluczowe

EN

nonwoven geotextiles; clogging; constriction; gradient ratio

PL

geowłóknina; kolmatacja; przewężenie; współczynnik gradientu

• Wydawca: Sieć Badawcza Łukasiewicz - Łódzki Instytut Technologiczny
• Czasopismo: Fibres & Textiles in Eastern Europe
• Rocznik: 2020
• Tom: Vol. 28, no. 1 (139)
• Strony: 87--92
• Opis fizyczny: Bibliogr. 35 poz., rys., tab.

Twórcy

autor

Miszkowska Anna

• Warsaw University of Life Sciences, Faculty of Civil and Environmental Engineering, Nowoursynowska 159, 02-776 Warsaw, Poland

autor

Koda Eugeniusz

• Warsaw University of Life Sciences, Faculty of Civil and Environmental Engineering, Nowoursynowska 159, 02-776 Warsaw, Poland

autor

Krzywosz Zygmunt

• Warsaw University of Life Sciences, Faculty of Civil and Environmental Engineering, Nowoursynowska 159, 02-776 Warsaw, Poland

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).