Das Verhalten des Bodens unter Lasten

Schoklitsch, Armin

doi:10.1007/978-3-7091-5032-0_4

Cited by 8 publications

(12 citation statements)

References 2 publications

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“…Figure 1b,c display that the riverbed level had been apparently lowered down 4.5 m deep near the pier with a diameter of 3.6 m. Many researchers devoted themselves to studying local scour below drop structures and at bridge piers (Dey 2014) [1]. Some researchers focused on the local scour below drop structures; for example, Schoklitsch (1932) has been the pioneering researcher and proposed an empirical relationship to estimate the equilibrium scour depth for flow-over structures [2]. Moore (1943), Rand (1955), Akram (1979), and Little and Murphey (1982) studied the energy change due to the drop [3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

A Study on Interaction between Overfall Types and Scour at Bridge Piers with a Moving-Bed Experiment

Lee

Huang

2021

Water

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River slopes can be changed due to an extreme event, e.g., a large-scale earthquake. This can uplift a riverbed greatly and thereby change the behavior of the river flow into a free or submerged overfall. Corresponding damage, including extreme erosion, on bridge piers located in the river can take place due to the aforementioned flow conditions. A reconstructed bridge pier in the same location would also experience a similar impact if the flow condition is not changed. It is important to identify these phenomena and research the mechanism in the interaction between overfall types and scour at bridge piers. Therefore, this paper is aimed at studying a mechanism of free and submerged overfall flow impacts on bridge piers with different distances by a series of moving-bed experiments. The experiment results showed clearly that bridge pier protection requires attention particularly when the pier is located in the maximum scour hole induced by the submerged overfall due to the z directional flow eddies. In many other cases, such as when the location of the bridge pier was at the upstream slope of a scour hole induced by a flow drop, a deposition mound could be observed at the back of the pier. This indicates that, while a pier is at this location, an additional protection takes place on the bridge pier.

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Section: Introductionmentioning

confidence: 99%

A Study on Interaction between Overfall Types and Scour at Bridge Piers with a Moving-Bed Experiment

Lee

Huang

2021

Water

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“…Plunge pool scour is an important issue in water resources engineering. Many approaches are empirically based, and they furnish practical relationships whose validity is limited to the tested conditions and configurations, as shown in [1][2][3][4]. A detailed literature review on the topic can be found in [5,6].…”

Section: Introductionmentioning

confidence: 99%

“…In particular, [12] related equilibrium scour condition to the excess of shear stress acting on the scour surface. They considered a 2D configuration caused by a jet originating from weirs and grade-control structures, evidencing that the maximum scour depth mainly depends on the parameters reported in Equation (1). Similarly, [13,14] provided semi-theoretical analysis including the temporal scour depth evolution.…”

Section: Introductionmentioning

confidence: 99%

“…An alternative semi-theoretical approach was proposed by [16,17] for the 2D and 3D cases, respectively. Namely, applying Newton's second law, [16,17] derived an equation to predict the variable ∆ + D, having the same analytical expression of Equation (1). Nevertheless, the dependence of the proposed equation on granulometric characteristics of bed material was empirically addressed.…”

Section: Introductionmentioning

confidence: 99%

“…They derived a theoretical expression for the variable ∆ + D assuming that the Turbulent Kinetic Energy (TKE) per unit mass in the scour hole is governed by the scales associated with the largest eddies and the TKE cascades from large to small scales at the same rate of the large scales (inviscid mechanism). They also provided the theoretical values of exponents appearing in Equation (1). Nevertheless, their analysis has been only recently validated with experimental and field data.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Pressure Fluctuations and Flow Confinement on Shear Stress in Jet-Driven Scour Processes

Pagliara

Palermo

2020

Water

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The effect of pressure fluctuations and flow confinement on shear stress still represents a challenging problem for hydraulic engineers. Only a few studies investigated such aspects, but they did not focus on jet-driven scour processes in granular bed material. Following a recent theoretical framework, this paper presents a novel analytical procedure to assess the effect of pressure fluctuations on the average shear stress for 2D equilibrium configuration, under steady, black water flow conditions. The analysis of experimental data evidences that published formulas underestimate the maximum shear stress, because of the significant flow confinement and the presence of rotating material in the scour hole. Therefore, based on the hydrodynamic similitude characterizing the jet diffusion in a confined environment, a new shear stress coefficient and a novel equation are proposed to estimate the maximum shear stress for the tested configuration.

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Armin Schoklitsch: Wasserbau-Karriere in Brünn (Teil 2)

Hager

2015

Österr Wasser- und Abfallw

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Zusammenfassung Das Werk und Leben von Armin Schoklitsch von seiner Ernennung im Jahr 1926 zum Wasserbau-Professor an der Deutschen Technischen Hochschule in Brünn über die Rückkehr an die TH Graz bis zur Übersiedlung nach Argentinien wird beschrieben. In diesem Zeitabschnitt entstanden verschiedene wichtige Bücher des Wasser-und Flussbaus, die im Lichte der Entwicklungen dieser Fachgebiete erläutert werden. Der Einfluss der Forschungen Schoklitschs insbesondere auf den Sedimenttransport wird dabei beleuchtet. Weiterhin soll das Leben des Wasserbau-Ingenieurs in den Zwischenkriegsjahren beschrieben werden. Schließlich wird Schoklitschs Rolle in Graz während der letzten Kriegsjahre besprochen.

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Das Verhalten des Bodens unter Lasten

Cited by 8 publications

References 2 publications

A Study on Interaction between Overfall Types and Scour at Bridge Piers with a Moving-Bed Experiment

A Study on Interaction between Overfall Types and Scour at Bridge Piers with a Moving-Bed Experiment

Effect of Pressure Fluctuations and Flow Confinement on Shear Stress in Jet-Driven Scour Processes

Armin Schoklitsch: Wasserbau-Karriere in Brünn (Teil 2)

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