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Rasoul Daneshfaraz

Rasoul Daneshfaraz

Academic rank: Professor
ORCID:
Education: PhD.
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Research

Title
Effects of Hydraulic Characteristics, Sedimentary Parameters, and Mining of Bed Material on Scour Depth of Bridge Pier Groups
Type
JournalPaper
Keywords
Scour pattern; Pier group; Bed grading; Mining materials.
Year
2021
Journal JOURNAL OF PERFORMANCE OF CONSTRUCTED FACILITIES
DOI
Researchers Mahdi Majedi-Asl ، Rasoul Daneshfaraz ، JOHN ABRAHAM ، saeedeh valizadeh

Abstract

The purpose of this study is to investigate the effect on flow hydrodynamics of grading of the bed and the mining of sand from the river bed around a bridge pier group. In total, 22 experiments with two different bed gradings (‘A’ and ‘B’), three different discharge rates, and Froude numbers were performed. In order to investigate the effect of mining on scour rate, the mining of material was carried out both upstream and downstream of the pier group. It was observed that the mining from downstream locations led to an increased scouring around the pier group. At a Froude number of 0.5, the existence of a pit hole downstream of the pier group causes a 3% and 9.7% increase in the maximum scour depth for grading ‘A’ and ‘B’, respectively. On the other hand, mining materials from upstream locations and for the same Froude number decreased scouring by 9% for ‘A’ grading and 8.1% for ‘B’ grading. A regression method was used to provide an equation that can be used to estimate the scour depth.