Characteristics of developing scour-holes at a sand-embedded cylinder

Link, Óscar; Pfleger, Florian; Zanke, Ulrich

doi:10.1016/s1001-6279(08)60023-2

Cited by 69 publications

(30 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They recorded the sediment bed through a transparent window that was covering the surface of the flow to observe how the patterns of sediment transport vary as scour grows. Also, in [25] a laser range finder was mounted on a motorized carriage inside a transparent cylinder and obtained multiple bathymetric measurements within an evolving scour hole. In their study, complete topographies were measured in an asynchronous manner using 30-180 s per topography scan and a few of them were presented to discuss some morphological characteristics of the bed, such as volumes and slopes around the scour hole.…”

Section: Introductionmentioning

confidence: 99%

Quantitative Spatio-Temporal Characterization of Scour at the Base of a Cylinder

Bouratsis¹,

Diplas

Dancey

et al. 2017

Water

View full text Add to dashboard Cite

Abstract:The measurement of the morphologic characteristics of evolving sediment beds around hydraulic structures is crucial for the understanding of the physical processes that drive scour. Although there has been significant progress towards the experimental characterization of the flow field in setups with complex geometries, little has been done with respect to the quantitative investigation of dynamic sediment bed geometry, mainly due to the limited capabilities of conventional instrumentation. Here, a recently developed computer vision technique is applied to obtain high-resolution topographic measurements of the evolving bed at the base of a cylinder during clear water scour, without interrupting the experiment. The topographic data is processed to derive the morphologic characteristics of the bed such as the excavated volume and the slopes of the bed. Subsequently, the rates of scour and the bathymetry at multiple locations are statistically investigated. The results of this investigation are compared with existing flow measurements from previous studies to describe the physical processes that take place inside a developing scour hole. Two distinct temporal phases (initial and development) as well as three spatial regions (front, side and wake) are defined and expressions for the statistical modelling of the bed features are derived.

show abstract

Section: Introductionmentioning

confidence: 99%

Quantitative Spatio-Temporal Characterization of Scour at the Base of a Cylinder

Bouratsis¹,

Diplas

Dancey

et al. 2017

Water

View full text Add to dashboard Cite

show abstract

“…Others concentrated on the flow field around the cylinder, via experimental measurements (Dey and Raikar, 2007;Graf and Istiarto, 2002;Graf and Yulistiyanto, 1998;Unger and Hager, 2007) and numerical experiments (Gobert et al, 2010;Kirkil et al, 2008Kirkil et al, , 2009Rolound et al, 2005). Link et al (2008) and Diab et al (2010) presented detailed measurements of developing and equilibrium scour holes around cylinders in fine sand and gravel, respectively. Scour manuals and design guidelines offer a comprehensive description of scour at cylinders in steady currents (e.g.…”

Section: Introductionmentioning

confidence: 99%

Equilibrium scour depths around piles in noncohesive sediments under currents and waves

Zanke

Hsu

Roland

et al. 2011

Coastal Engineering

Self Cite

View full text Add to dashboard Cite

“…This unexpected lows of water can signiicantly damage bridge structures crossing these watercourses (see, e.g. Cajka and Manasek, 2005;Link et al, 2008;Pasiok and Stilger-Szydlo, 2010;Burns et al, 2011;Wang et al, 2011;Yu et al, 2011;Khosronejad et al, 2012;Collins et al, 2013;Lin et al, 2014;Afzali, 2015;Ehteram and Meymand, 2015;Klinga and Alipour, 2015;Fael et al, 2016;Mohamed et al, 2016). In association with this growing risk, a study examining efects of scour to a bridge abutment was elaborated.…”

Section: Introductionmentioning

confidence: 99%

Influence of Contact Stress Model on the Stability of Bridge Abutment

Čajka¹,

Pustka²,

Sekanina³

2017

Proceedings of the 2nd Czech-China Scientific Conference 2016

View full text Add to dashboard Cite

This chapter deals with the behaviour of an abutment pier on subsoil subjected to lood changes. The loods increase the cross-section of the river bed and change the properties of the foundation soil under the foundation. First, the soil saturates with water. Then, ine-grained particles will wash away and inally parts of the basement rock will be washed of. Finite element method has been used for the calculation of the interaction between the foundation and the subsoil. The foundation has been modelled in a 2D environment using spatial components. For the subsoil, an element with efects of an elastic foundation has been used. The stifness of the bedrock has been characterized by the C parameter. The chapter describes situations related to the collapse of the structure.

show abstract

Characteristics of developing scour-holes at a sand-embedded cylinder

Cited by 69 publications

References 14 publications

Quantitative Spatio-Temporal Characterization of Scour at the Base of a Cylinder

Quantitative Spatio-Temporal Characterization of Scour at the Base of a Cylinder

Equilibrium scour depths around piles in noncohesive sediments under currents and waves

Influence of Contact Stress Model on the Stability of Bridge Abutment

Contact Info

Product

Resources

About