Details
| Originalsprache | Englisch |
|---|---|
| Aufsatznummer | 04015023 |
| Fachzeitschrift | Journal of Waterway, Port, Coastal and Ocean Engineering |
| Jahrgang | 142 |
| Ausgabenummer | 3 |
| Publikationsstatus | Veröffentlicht - 30 Dez. 2015 |
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 di/dσ (with dσ as the product of the geometric mean size dg and the geometric standard deviation σg) is suitable for describing the stability behavior of the investigated material.
Schlagwörter
- Erosion stability, Incipient motion, Laboratory tests, Scour protection, Shear stress, Cost effectiveness, Equipment testing, Erosion, Flow velocity, Optimization, Quarries, Stability, Continuous optimization, Critical shear stress, Erosion stabilities, Geometric standard deviations, Laboratory test, Least-square fitting, erosion control, erosion rate, flow field, flow velocity, granodiorite, quarry, scour, shear stress, stability analysis
ASJC Scopus Sachgebiete
- Ingenieurwesen (insg.)
- Tief- und Ingenieurbau
- Umweltwissenschaften (insg.)
- Gewässerkunde und -technologie
- Ingenieurwesen (insg.)
- Meerestechnik
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in: Journal of Waterway, Port, Coastal and Ocean Engineering, Jahrgang 142, Nr. 3, 04015023, 30.12.2015.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Erosion stability of wide-graded quarry-stone material under unidirectional current
AU - Schendel, A.
AU - Goseberg, N.
AU - Schlurmann, T.
N1 - Cited By :12 Export Date: 1 February 2021
PY - 2015/12/30
Y1 - 2015/12/30
N2 - 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 di/dσ (with dσ as the product of the geometric mean size dg and the geometric standard deviation σg) is suitable for describing the stability behavior of the investigated material.
AB - 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 di/dσ (with dσ as the product of the geometric mean size dg and the geometric standard deviation σg) is suitable for describing the stability behavior of the investigated material.
KW - Erosion stability
KW - Incipient motion
KW - Laboratory tests
KW - Scour protection
KW - Shear stress
KW - Cost effectiveness
KW - Equipment testing
KW - Erosion
KW - Flow velocity
KW - Optimization
KW - Quarries
KW - Stability
KW - Continuous optimization
KW - Critical shear stress
KW - Erosion stabilities
KW - Geometric standard deviations
KW - Laboratory test
KW - Least-square fitting
KW - erosion control
KW - erosion rate
KW - flow field
KW - flow velocity
KW - granodiorite
KW - quarry
KW - scour
KW - shear stress
KW - stability analysis
UR - http://www.scopus.com/inward/record.url?scp=84964683947&partnerID=8YFLogxK
U2 - 10.1061/(ASCE)WW.1943-5460.0000321
DO - 10.1061/(ASCE)WW.1943-5460.0000321
M3 - Article
AN - SCOPUS:84964683947
VL - 142
JO - Journal of Waterway, Port, Coastal and Ocean Engineering
JF - Journal of Waterway, Port, Coastal and Ocean Engineering
SN - 0733-950X
IS - 3
M1 - 04015023
ER -