The Study of Rate of Scour at Cylindrical, Square and Round Nosed Piers
Journal Title: Journal of Scientific Research and Reports - Year 2017, Vol 14, Issue 3
Abstract
Rate of scour adjacent to piled foundations may result in rapidly loss of skin friction and load bearing capacity of the piles. The piles may be subjected to unplanned bending stresses, from lateral loads and hydrodynamic forces. The knowledge related to the time taken by different piers to achieve a certain scour depth is limited. In this study experiments were conducted using wooden pier models in the re-circulating glass sided tilting flume of 12,5 m length, 300 mm width and 450 mm deep. In all three tests water depth, discharge, and mean approach flow velocity in the channel were kept constant. The flume was filled with cohessionless bed material (artificial sand) average grain diameter of 0.203 mm to a uniform thickness. The scour depths observed from experiments were 30 mm, 16 mm and 14 mm in square, cylindrical and round nosed piers respectively. It was observed that, it takes more time for the cylindrical and round nosed piers to achieve scour depth of 22.2 mm and 20 mm respectively as estimated by Breusers and Raudkivi 1991. The results also showed that: it takes shorter time for a square nosed pier to achieve its empirical scour depth value of 26.7 mm. This indicates that the rate of scour depth development in square nosed pier is higher than that of the cylindrical and round nosed piers at a given time.
Authors and Affiliations
Livingstone Swilla, Shija Kazumba
Keywords
Related Articles
- EP ID EP323351
- DOI 10.9734/JSRR/2017/33019
- Views 101
- Downloads 0
Properties of Fired Clay Bricks Mixed with Waste Glass
This study is to investigate the effect of adding waste glass on the properties of fired clay bricks. Two different particle sizes (smaller than 150 μm and 600 μm) of waste glass are added to clay mixes at contents of 0,...
Habitat Selection of Invasive Sika Deer Cervus nippon Living in a UK Lowland Heathland-Woodland-Grassland Mosaic: Implications for Habitat Conservation Management
Understanding the factors determining the choice and use of habitats by invasive species is key to the conservation management of habitats and may also enable species to be harnessed as conservation tools. Here we explor...
Development of a Hybrid Simulation and Optimization Model for Rural Electrification
Optimal sizing of hybrid renewable energy system is very important in determining the overall performance of hybrid system in terms of cost, reliability and system integrity. However, most of the existing Hybrid Power Sy...
The Study of Rate of Scour at Cylindrical, Square and Round Nosed Piers
Rate of scour adjacent to piled foundations may result in rapidly loss of skin friction and load bearing capacity of the piles. The piles may be subjected to unplanned bending stresses, from lateral loads and hydrodynami...
Infant Sleep Practices and Knowledge of Sudden Infant Death Syndrome among Mothers of Infants Attending the Paediatric Clinics of a Tertiary Hospital in Sokoto, Nigeria
Background: Sudden infant death syndrome (SIDS) is a sudden unexpected death of an infant, the cause of which remains unexplained after a thorough investigation. Supine sleep positioning recommended by the American Acade...