Results 71 to 80 of about 6,112,351 (103)

Propagation modes of 3D scour below a submarine pipeline in oblique steady currents and waves [PDF]

, 2016
This paper presents experimental results on 3D scour propagation along a pipeline under oblique-incidence currents and waves. Different modes of 3D scour propagation were discovered after the local scour was initiated below the pipeline.
Cheng L, 臧志鹏, Tang G
core   +1 more source

Assessment of the impacts of local scour at bridge piers on the stability of ice jams – An experimental study

Hydrology Research
Local scour at the bottom of bridge piers further affects the stability of ice jams. In this study, the experimental study on the influence of local scour on the stability of ice jams at the pier was carried out, and the test conditions of different ...
Zhixing Hou, Zhipeng Zhong, Jun Wang
doaj   +1 more source

A semi-empirical prediction model for scour depth around riprap-protected monopiles under steady currents

Applied Ocean Research
Local scour around monopiles remains a major concern for offshore foundations, and riprap protection is widely used to mitigate scour. However, residual deformation and scour within riprap protection layers may still occur, and their prediction remains ...
Xinzhu Yang, Yaling Qin, Shaopeng Yang, Minxi Zhang, Guoliang Yu   +4 more
doaj   +1 more source

Evaluation of empirical equations for scour downstream grade-control weirs

, 2018
The grade control structures are frequently adopted in the Mountain Rivers and streams to prevent severe bed degradation and channel incision. These structures are constructed as a staircase-like sequence of transverse weirs or bed sills.
Wang, L, Lu Wang, Bruce W. Melville, Dawei Guan, Guan, D, Melville, BW   +5 more
core   +1 more source

Sacrificial piles as a countermeasure against local scour around underwater pipelines

Water Science and Engineering
Local scour around pipelines crossing rivers or in marine environments is a significant concern. It can lead to failure of the pipelines resulting in environmental side effects and economic losses.
Forough Raeisi, Seyed Mohammad Ali Zomorodian, Masih Zolghadr, Hazi Mohammad Azamathulla   +3 more
doaj   +1 more source

Temporal variation of local scour at bridge piers with complex geometries

, 2012
Scour at uniform cylindrical piers founded in cohesionless sediments has received much attention over the last decades and there are extensive laboratory data for these conditions in literature.
OLIVETO, Giuseppe
core   +1 more source

A review of recent advances in numerical modelling of local scour problems

, 2014
A review is presented of recent advances in numerical modelling of local scour problems. The review is organized in five sections: Highlights of numerical modelling of local scour; Influence of turbulence on scour; Backfilling of scour holes; Scour ...
B Sumer, Sumer, B. Mutlu
core   +1 more source

Pier shape and alignment effects on local scour [PDF]

, 2014
Bridge piers may have several horizontal shapes and be built with different alignment angles towards the flow direction. The effects of pier shape and alignment have been studied by only a few researchers, the most well-known being Laursen and Toch [1956]
Fael, Cristina, Lança, Rui, Cardoso, António   +2 more
core  

Local Scour at Straight Guide Banks in Plain Rivers

The local scour at abutments, elliptical and straight guide banks in plain rivers was studied. The flow pattern and the scour hole parameters at abutments, elliptical and straight guide banks are different.
Neilands, Roberts, Klīve, Guntis, Gjunsburgs, Boriss   +2 more
core  

Clear-water scour at single piers and pile groups [PDF]

, 2013
The major damage to bridges at river crossings occurs during floods. Damage is caused for various reasons, one of the main reasons being the riverbed scour at bridge foundations.
Lança, Rui Miguel Madeira
core