Erosion Stability of Wide-Graded Quarry-Stone Material under Unidirectional Current

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Schendel, A.; Goseberg, N.; Schlurmann, T.: Erosion Stability of Wide-Graded Quarry-Stone Material under Unidirectional Current. In: Journal of Waterway Port Coastal and Ocean Engineering 142 (2016), Nr. 3. DOI: https://doi.org/10.1061/(ASCE)WW.1943-5460.0000321

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Sum total of downloads: 112




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Abstract: 
Scour protection around hydraulic structures in fluvial, estuarine, and coastal waters is an essential component of a meaningful and durable design. The continuous optimization of scour protection systems and design approaches leads to faster and more cost-effective construction processes. Although scour protection now often consists of a two-layer design, approaches that incorporate only one layer depict a major step forward. Therefore, this research focuses on the stability of a wide-graded quarry-stone mixture consisting of crushed granodiorite (Jelsa quarry, Norway) with fractions ranging from 0.063 to 200 mm. The material was exposed to an incrementally increased unidirectional current in a closed-circuit flume. The induced flow field and leading parameters were measured at various positions horizontally and vertically, whereas the erosion rates were determined behind the test bed specimen. With increasing flow velocity the development of a static armor layer was observed at the bed surface. Bed-shear stresses were determined to be strongly variable across the rough test bed. Fractional critical shear stresses indicate highly selective mobility of individual fractions. Least-square fitting of the determined critical shear stresses based on the dimensionless reference grain size d(i)/d(sigma) (with d(sigma) as the product of the geometric mean size d(g) and the geometric standard deviation sigma(g)) is suitable for describing the stability behavior of the investigated material.
License of this version: CC BY 4.0 Unported
Document Type: Article
Publishing status: publishedVersion
Issue Date: 2016
Appears in Collections:Fakultät für Bauingenieurwesen und Geodäsie

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pos. country downloads
total perc.
1 image of flag of Germany Germany 73 65.18%
2 image of flag of United States United States 14 12.50%
3 image of flag of China China 8 7.14%
4 image of flag of Iran, Islamic Republic of Iran, Islamic Republic of 3 2.68%
5 image of flag of India India 3 2.68%
6 image of flag of Portugal Portugal 2 1.79%
7 image of flag of Nigeria Nigeria 1 0.89%
8 image of flag of Greece Greece 1 0.89%
9 image of flag of Canada Canada 1 0.89%
10 image of flag of Bulgaria Bulgaria 1 0.89%
    other countries 5 4.46%

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