The effect of pile spacing and arrangement on bed formation and scour hole dimensions in pile groups

Autor: Ata Amini, Hossein Banejad, Pezhman Taherei Ghazvinei, Nina Solaimani
Rok vydání: 2017
Předmět:
Zdroj: International Journal of River Basin Management. 15:219-225
ISSN: 1814-2060
1571-5124
DOI: 10.1080/15715124.2016.1274321
Popis: Pile scour is the main cause of bridge failure. A physical model used in this research to study scour around a group of piles in clear-water conditions. The study examined changes in stream bed, volume and area of scour holes due to changes in pile spacing and arrangements. For this purpose, width, length and depth of scour hole variation and also changes in channel bed formation owing to pile groups, their arrangement and spacing were studied. An experimental channel with a length of 10 m, a width of 0.83 m and a depth of 0.5 m was used. The channel bed was covered with medium-sized uniform sediments for 0.9 mm. The discharge and flow velocity were adjusted to clear-water conditions. In each experiment, the channel bed changes and the scour hole were recorded and analysed. The results showed that the piles’ arrangement and their spacing affected the area and volume of scour hole so that with increasing pile spacing, despite the scour depth, volume and area of the scour hole increased. The channel...
Databáze: OpenAIRE
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