Experimental analysis of scour under circular pier

For economical design, scour around the bridge piers is required to be controlled. In the present study, an attempt has been made to minimize scour depth by placing a triangular prism on the downstream side of a circular pier (35 mm dia) with one of its noses facing the direction of flow and other f...

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Autores principales:	Ashish Malik, S. K. Singh, Mohit Kumar
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	circular pier flow altering device open channel flow scouring triangular prism Water supply for domestic and industrial purposes TD201-500 River, lake, and water-supply engineering (General) TC401-506
Acceso en línea:	https://doaj.org/article/79396bc26fca4fa796f98a3c7e08abc0
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spelling	oai:doaj.org-article:79396bc26fca4fa796f98a3c7e08abc02021-11-06T07:04:57ZExperimental analysis of scour under circular pier1606-97491607-079810.2166/ws.2020.318https://doaj.org/article/79396bc26fca4fa796f98a3c7e08abc02021-02-01T00:00:00Zhttp://ws.iwaponline.com/content/21/1/422https://doaj.org/toc/1606-9749https://doaj.org/toc/1607-0798For economical design, scour around the bridge piers is required to be controlled. In the present study, an attempt has been made to minimize scour depth by placing a triangular prism on the downstream side of a circular pier (35 mm dia) with one of its noses facing the direction of flow and other facing opposite to the direction of flow. Three different bed samples collected from Ghaggar, Patialki-Rao and the Kotla super-passage have been placed in a rectangular flume. Discharge values were varied from 0.0015 to 0.0186 m3/sec. Results are compared for observed scour-depth for upstream (U/S) and downstream (D/S) piers with and without protection. Arrangement with a triangular prism of 2.5 times the diameter of the circular pier in the upstream direction of the flow is very effective in reducing scour depth. Further, it is possible to reduce the scour depth with an average efficiency of 65% for Ghaggar, 56% for Patialaki-Rao and 64% for the Kotla super-passage with respect to the circular pier. The comparison of observed values of scour-depth with computed values of Lacey's scour-depth was underestimated with a maximum of ±70%. Hence, a new site-specific relationship between scour depth, discharge intensity and silt factor has been proposed. Validation of the new proposed relationship with observed data is in a good agreement ±20%.Ashish MalikS. K. SinghMohit KumarIWA Publishingarticlecircular pierflow altering deviceopen channel flowscouringtriangular prismWater supply for domestic and industrial purposesTD201-500River, lake, and water-supply engineering (General)TC401-506ENWater Supply, Vol 21, Iss 1, Pp 422-430 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	circular pier flow altering device open channel flow scouring triangular prism Water supply for domestic and industrial purposes TD201-500 River, lake, and water-supply engineering (General) TC401-506
spellingShingle	circular pier flow altering device open channel flow scouring triangular prism Water supply for domestic and industrial purposes TD201-500 River, lake, and water-supply engineering (General) TC401-506 Ashish Malik S. K. Singh Mohit Kumar Experimental analysis of scour under circular pier
description	For economical design, scour around the bridge piers is required to be controlled. In the present study, an attempt has been made to minimize scour depth by placing a triangular prism on the downstream side of a circular pier (35 mm dia) with one of its noses facing the direction of flow and other facing opposite to the direction of flow. Three different bed samples collected from Ghaggar, Patialki-Rao and the Kotla super-passage have been placed in a rectangular flume. Discharge values were varied from 0.0015 to 0.0186 m3/sec. Results are compared for observed scour-depth for upstream (U/S) and downstream (D/S) piers with and without protection. Arrangement with a triangular prism of 2.5 times the diameter of the circular pier in the upstream direction of the flow is very effective in reducing scour depth. Further, it is possible to reduce the scour depth with an average efficiency of 65% for Ghaggar, 56% for Patialaki-Rao and 64% for the Kotla super-passage with respect to the circular pier. The comparison of observed values of scour-depth with computed values of Lacey's scour-depth was underestimated with a maximum of ±70%. Hence, a new site-specific relationship between scour depth, discharge intensity and silt factor has been proposed. Validation of the new proposed relationship with observed data is in a good agreement ±20%.
format	article
author	Ashish Malik S. K. Singh Mohit Kumar
author_facet	Ashish Malik S. K. Singh Mohit Kumar
author_sort	Ashish Malik
title	Experimental analysis of scour under circular pier
title_short	Experimental analysis of scour under circular pier
title_full	Experimental analysis of scour under circular pier
title_fullStr	Experimental analysis of scour under circular pier
title_full_unstemmed	Experimental analysis of scour under circular pier
title_sort	experimental analysis of scour under circular pier
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/79396bc26fca4fa796f98a3c7e08abc0
work_keys_str_mv	AT ashishmalik experimentalanalysisofscourundercircularpier AT sksingh experimentalanalysisofscourundercircularpier AT mohitkumar experimentalanalysisofscourundercircularpier
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Experimental analysis of scour under circular pier

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