IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 35th IAHR Congress - Chengdu (2013) : THEME 5 - FLUVIAL HYDRAULICS AND RIVER MANAGEMENT : Cohesive Soil Erosion at Bridge Contractions
Cohesive Soil Erosion at Bridge Contractions
Author : Meilan Qi
River bed scour in cohesive soil at bridge contractions is a difficult problem to solve, in which many factors are included such as density, water contents, clay contents, mineral component and structure of the cohesive soil. Bridge contraction increases water flow velocity at cross section. Field investigation data collected at 34 bridge opening sites from China were used to analyze the effect of the plastic index on the scour. Furtherly, based on mechanic equilibrium relationship between the two forces of the cohesive soil, shear strength of the cohesive soil and water flow shear stress, critical shear stress for cohesive soils scour was obtained. An estimation equation of equilibrium contraction scour depth in cohesive soils was derived.
File Size : 202,117 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 35th IAHR Congress - Chengdu (2013)
Date Published : 18/07/2016
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