Scour depth estimation methods around pile groups

Hosseini, Rashed; Amini, Ata

doi:10.1007/s12205-015-0594-7

Cited by 46 publications

(14 citation statements)

References 30 publications

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“…Therefore, transportation of bed material around the front pier is facilitated and the scour depth, d s , at the upstream of the front pier increases compared to the single pier case. The intensity of this mechanism decreases with an increase in pier spacing [7].…”

Section: Scour Mechanisms In Dual Piersmentioning

confidence: 96%

Reliability-based evaluation of scour around dual bridge piers

Yılmaz¹,

Çalamak²,

Yanmaz³

2019

JCE

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The causes of uncertainty involved in temporal variation of the depth of cavern formation due to clear water scouring at dual piers with tandem arrangement are identified in this study. In an example, the probability of failure induced by scouring around dual piers is estimated for various pier spacing using probabilistic analysis. The effects of changes in the coefficient of variation of probabilistic scouring variables and probability distributions on the probability of the loss of stability, are also investigated. It was established that the effects of variations in the coefficient of variation on the probability of the loss of stability are more significant compared to that on the probability distributions of the scour depth. Key words: bridge, pier, probability of the loss of stability, scour, tandem arrangement, uncertainty Prethodno priopćenje Meric Yilmaz, Melih Calamak, A. Melih YanmazOcjena podlokavanja oko dvojnih stupova mosta primjenom analize pouzdanosti U ovom se istraživanju određuju uzroci nepouzdanosti uslijed vremenske varijacije dubine kaverne nastale podlokavanjem u uvjetima bistre vode na mjestu dvojnih stupova tandemskog razmještaja. Na primjeru se probabilističkom analizom ocjenjuje vjerojatnost gubitka stabilnosti uslijed podlokavanja oko dvojnih stupova, za razne razmake stupova. Istraženi su i utjecaji promjene koeficijenta varijacije probabilističkih varijabli podlokavanja, te funkcije razdiobe vjerojatnosti, na vjerojatnost gubitka stabilnosti. Utvrđeno je da su utjecaji promjene koeficijenta varijacije na vjerojatnost gubitka stabilnosti značajniji od razdiobe vjerojatnosti dubine podlokavanja. Ključne riječi: most, stup, vjerojatnost gubitka stabilnosti, podlokavanje, tandemski razmještaj, nepouzdanost Vorherige Mitteilung Meric Yilmaz, Melih Calamak, A. Melih Yanmaz Beurteilung der Unterspülung um die Doppelpfeiler einer Brücke anhand einer Zuverlässigkeitsanalyse In dieser Studie werden die Ursachen für die Unzuverlässigkeit durch die zeitliche Variation der Tiefe der Kaverne bestimmt, die durch Unterspülung mit klaren Wasserbedingungen am Standort von Doppelpfeilern in Tandemanordnung erzeugt wird. Am Beispiel wird mittels der probabilistischen Analyse die Wahrscheinlichkeit eines Stabilitätsverlusts aufgrund der Unterspülung von Doppelpfeilern mit unterschiedlichen Säulenabständen bewertet. Die Auswirkungen der Änderung des Variationskoeffizienten probabilistischer Variablen der Unterspülung sowie der Wahrscheinlichkeitsverteilungsfunktion auf die Wahrscheinlichkeit eines Stabilitätsverlusts wurden ebenfalls untersucht. Es wurde festgestellt, dass die Auswirkungen der Änderung des Variationskoeffizienten auf die Wahrscheinlichkeit eines Stabilitätsverlusts signifikanter waren als die Wahrscheinlichkeitsverteilung der Unterspülungstiefe.

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Section: Scour Mechanisms In Dual Piersmentioning

confidence: 96%

Reliability-based evaluation of scour around dual bridge piers

Yılmaz¹,

Çalamak²,

Yanmaz³

2019

JCE

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“…The local scour may occur in two types: clear-water and live-bed scour. Generally, in the clear-water scour there is no movement of bed materials [Brandimarte et al, 2006;Hosseini, Amini, 2015]. In the waters of the considered rivers, sediments are transported; hence, the intensity of erosion and accumulation processes are significant.…”

Section: Contraction and Local Scourmentioning

confidence: 99%

The Impact of Bridges on the Process of Water Turbidity on the Example of Large Lowland Rivers

Szatten¹,

Habel²,

Babiński³

et al. 2019

J. Ecol. Eng.

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The transformations of river channels as a result of human activity may reflect the level of anthropogenic pressure. Recorded in macroscale, they are indicators of transformations for the larger part of the river basin, while in the microscale they usually refer to its fragment. The human activity that has the strongest influence on the fluvial processes, including suspended sediment transport, is the interference in the riverbed, such as hydrotechnical construction (create of water stages) or transformation of the river banks (concreting of the river banks). The aim of the research was to determine the impact of bridges on the process of water turbidity in the longitudinal profile of large lowland rivers. The research area was the lower reach of Vistula-bridge profiles: Torun, Bydgoszcz, Kiezmark (Poland) and bridge profile on Sukhona-a tributary of the Northern Dvina River near the city of Veliky Ustyug (Russia-Arkhangelsk Oblast). The research conducted in the years 2013-2017 included the measurements of water turbidity in the cross-sections of the above-mentioned rivers. The determinations of water turbidity were carried out using traditional (granulometry analysis) and nephelometric methods (devices: LISST-25X and turbidimeter). The impact of bridges on the variability of water turbidity was determined. The obtained results were related to the variability of depth conditions (bathymetric measurements) and hydrodynamics in the cross-section profile of the channel.

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“…Böylece, taban malzemesi ön ayak etrafındaki oyulma çukurundan kolayca taşınır ve ayağın memba yüzündeki oyulma derinliği, tekil ayak durumuna göreceli olarak artar. Güçlendirme mekanizmasının şiddeti, artan ayaklar arası mesafe ve akım açısı ile birlikte azalır [17].…”

Section: İlgi̇li̇ Li̇teratüre Genel Bakişunclassified

İkili Köprü Ayaklarında Temiz Su Oyulmasının Zamansal Gelişimi

Yılmaz¹,

Yanmaz²,

Köken³

2018

Teknik Dergi

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Alüvyonlu akarsu tabanına inşa edilen köprülerde, köprü ayaklarının emniyetli tasarımı için ayaklar etrafında oluşan maksimum oyulma derinliğinin pik tasarım debisine erişme süresine kadarki zamansal gelişimini incelemek gerekmektedir. Bu çalışmada, akım doğrultusuna paralel arka arkaya konumlanmış ikili köprü ayakları etrafında, temiz su ve üniform taban malzemesi koşullarında oluşan oyulma çukurunun yüzey özelliklerini incelemek amacıyla deneysel bir araştırma yürütülmüştür. Deneyler, değişik ayak çapı ve ayaklar arası mesafelerde ikili özdeş silindir ayaklar kullanılarak değişik akım şiddetleri ile gerçekleştirilmiştir. Çalışmanın sonucunda, maksimum temiz su oyulmasının zamansal değişimini tahmin eden bir denklem üretilmiştir. Deneylerin test aralığında, önerilen denklemin deneysel bulgularla uyum gösterdiği gözlenmiştir.

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Scour depth estimation methods around pile groups

Cited by 46 publications

References 30 publications

Reliability-based evaluation of scour around dual bridge piers

Reliability-based evaluation of scour around dual bridge piers

The Impact of Bridges on the Process of Water Turbidity on the Example of Large Lowland Rivers

İkili Köprü Ayaklarında Temiz Su Oyulmasının Zamansal Gelişimi

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