Physical modeling of buried PVC pipes overlying localized ground subsidence

The last half-century has witnessed a proliferation in the use of polyvinyl chloride (PVC) pipes in civil engineering applications. However, little physical data are available to date to assess conformance with performance limits of these pipes subjected to events involving localized ground subsiden...

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Principais autores: Costa, Yuri Daniel Jatobá, Zornberg, Jorge G., Costa, Carina Maia Lins
Formato: article
Idioma:English
Publicado em: Springer
Assuntos:
Ground subsidence
Physical modeling
PVC pipe
Soil arching
Trapdoor
Endereço do item:https://repositorio.ufrn.br/handle/123456789/30549
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spelling ri-123456789-305492020-11-15T08:07:07Z Physical modeling of buried PVC pipes overlying localized ground subsidence Costa, Yuri Daniel Jatobá Zornberg, Jorge G. Costa, Carina Maia Lins Ground subsidence Physical modeling PVC pipe Soil arching Trapdoor The last half-century has witnessed a proliferation in the use of polyvinyl chloride (PVC) pipes in civil engineering applications. However, little physical data are available to date to assess conformance with performance limits of these pipes subjected to events involving localized ground subsidence. In this study, experimental results are generated and evaluated from a series of physical models involving a buried PVC pipe overlying a localized subsiding bedding zone. Ground subsidence was simulated using a precisely controlled trapdoor system positioned at mid-length of the pipe. A technique including the use of a custommade displacement transducer was developed as part of this study to facilitate collection of continuous deflection profiles along the axis of the pipes. The progressive development of soil arching was also monitored using earth pressure sensors placed on the top, sides, and at several locations beneath the pipe, both within and beyond the zone of ground subsidence. Strains in the external wall of the pipe were also monitored. The results indicate that significant bending developed in the portion of the pipe traversing the subsidence zone, especially at the pipe crown. Beyond this point, radial deflections of the pipe cross section continued to be detected along the pipe length to distances of approximately four pipe diameters. Ground subsidence induced a severe redistribution of the earth pressures measured in the soil mass surrounding the pipe. A significant increase in vertical soil pressures beneath the pipe was captured within a distance of about one pipe diameter outside the subsidence zone. The overall response of the PVC pipe to localized ground subsidence was found to improve with increasing backfill density and decreasing soil confinement 2020-11-09T20:00:42Z 2020-11-09T20:00:42Z 2020-09-05 article COSTA, Y. D. J.; ZORNBERG, J. G.; COSTA, C. M. L.. Physical modeling of buried PVC pipes overlying localized ground subsidence. Acta Geotechnica, v. (), p. 1, 2020. Disponível em: https://link.springer.com/article/10.1007%2Fs11440-020-01058-9. Acesso em: 28 out. 2020. https://doi.org/10.1007/s11440-020-01058-9 1861-1133 1861-1125 https://repositorio.ufrn.br/handle/123456789/30549 10.1007/s11440-020-01058-9 en Attribution 3.0 Brazil http://creativecommons.org/licenses/by/3.0/br/ application/pdf Springer
institution Repositório Institucional
collection RI - UFRN
language English
topic Ground subsidence
Physical modeling
PVC pipe
Soil arching
Trapdoor
spellingShingle Ground subsidence
Physical modeling
PVC pipe
Soil arching
Trapdoor
Costa, Yuri Daniel Jatobá
Zornberg, Jorge G.
Costa, Carina Maia Lins
Physical modeling of buried PVC pipes overlying localized ground subsidence
description The last half-century has witnessed a proliferation in the use of polyvinyl chloride (PVC) pipes in civil engineering applications. However, little physical data are available to date to assess conformance with performance limits of these pipes subjected to events involving localized ground subsidence. In this study, experimental results are generated and evaluated from a series of physical models involving a buried PVC pipe overlying a localized subsiding bedding zone. Ground subsidence was simulated using a precisely controlled trapdoor system positioned at mid-length of the pipe. A technique including the use of a custommade displacement transducer was developed as part of this study to facilitate collection of continuous deflection profiles along the axis of the pipes. The progressive development of soil arching was also monitored using earth pressure sensors placed on the top, sides, and at several locations beneath the pipe, both within and beyond the zone of ground subsidence. Strains in the external wall of the pipe were also monitored. The results indicate that significant bending developed in the portion of the pipe traversing the subsidence zone, especially at the pipe crown. Beyond this point, radial deflections of the pipe cross section continued to be detected along the pipe length to distances of approximately four pipe diameters. Ground subsidence induced a severe redistribution of the earth pressures measured in the soil mass surrounding the pipe. A significant increase in vertical soil pressures beneath the pipe was captured within a distance of about one pipe diameter outside the subsidence zone. The overall response of the PVC pipe to localized ground subsidence was found to improve with increasing backfill density and decreasing soil confinement
format article
author Costa, Yuri Daniel Jatobá
Zornberg, Jorge G.
Costa, Carina Maia Lins
author_facet Costa, Yuri Daniel Jatobá
Zornberg, Jorge G.
Costa, Carina Maia Lins
author_sort Costa, Yuri Daniel Jatobá
title Physical modeling of buried PVC pipes overlying localized ground subsidence
title_short Physical modeling of buried PVC pipes overlying localized ground subsidence
title_full Physical modeling of buried PVC pipes overlying localized ground subsidence
title_fullStr Physical modeling of buried PVC pipes overlying localized ground subsidence
title_full_unstemmed Physical modeling of buried PVC pipes overlying localized ground subsidence
title_sort physical modeling of buried pvc pipes overlying localized ground subsidence
publisher Springer
publishDate 2020
url https://repositorio.ufrn.br/handle/123456789/30549
work_keys_str_mv AT costayuridanieljatoba physicalmodelingofburiedpvcpipesoverlyinglocalizedgroundsubsidence
AT zornbergjorgeg physicalmodelingofburiedpvcpipesoverlyinglocalizedgroundsubsidence
AT costacarinamaialins physicalmodelingofburiedpvcpipesoverlyinglocalizedgroundsubsidence
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